/****************************************************************************** * * Copyright (C) 1999-2012 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ /****************************************************************************** * * This file contains functions for the Bluetooth Security Manager * ******************************************************************************/ //#define LOG_TAG "bt_btm_sec" #include #include #include "stack/bt_types.h" #include "device/controller.h" #include "stack/hcimsgs.h" #include "stack/btu.h" #include "btm_int.h" #include "l2c_int.h" #include "osi/fixed_queue.h" #include "osi/alarm.h" #if (BT_USE_TRACES == TRUE && BT_TRACE_VERBOSE == FALSE) /* needed for sprintf() */ #include #endif #if BLE_INCLUDED == TRUE #include "gatt_int.h" #endif #define BTM_SEC_MAX_COLLISION_DELAY (5000) #ifdef APPL_AUTH_WRITE_EXCEPTION BOOLEAN (APPL_AUTH_WRITE_EXCEPTION)(BD_ADDR bd_addr); #endif /******************************************************************************** ** L O C A L F U N C T I O N P R O T O T Y P E S * *********************************************************************************/ #if (SMP_INCLUDED == TRUE) static tBTM_SEC_SERV_REC *btm_sec_find_next_serv (tBTM_SEC_SERV_REC *p_cur); static tBTM_SEC_SERV_REC *btm_sec_find_mx_serv (UINT8 is_originator, UINT16 psm, UINT32 mx_proto_id, UINT32 mx_chan_id); static tBTM_STATUS btm_sec_execute_procedure (tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_sec_start_get_name (tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_sec_start_authentication (tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_sec_start_encryption (tBTM_SEC_DEV_REC *p_dev_rec); static void btm_sec_collision_timeout (TIMER_LIST_ENT *p_tle); static void btm_restore_mode(void); static void btm_sec_pairing_timeout (TIMER_LIST_ENT *p_tle); static tBTM_STATUS btm_sec_dd_create_conn (tBTM_SEC_DEV_REC *p_dev_rec); static void btm_sec_change_pairing_state (tBTM_PAIRING_STATE new_state); #endif ///SMP_INCLUDED == TRUE #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) static char *btm_pair_state_descr (tBTM_PAIRING_STATE state); #endif #if (SMP_INCLUDED == TRUE) static void btm_sec_check_pending_reqs(void); static BOOLEAN btm_sec_queue_mx_request (BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_orig, UINT32 mx_proto_id, UINT32 mx_chan_id, tBTM_SEC_CALLBACK *p_callback, void *p_ref_data); static void btm_sec_bond_cancel_complete (void); static void btm_send_link_key_notif (tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_sec_check_prefetch_pin (tBTM_SEC_DEV_REC *p_dev_rec); static UINT8 btm_sec_start_authorization (tBTM_SEC_DEV_REC *p_dev_rec); #endif ///SMP_INCLUDED == TRUE BOOLEAN btm_sec_are_all_trusted(UINT32 p_mask[]); #if (SMP_INCLUDED == TRUE) static tBTM_STATUS btm_sec_send_hci_disconnect (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 reason, UINT16 conn_handle); #endif ///SMP_INCLUDED == TRUE UINT8 btm_sec_start_role_switch (tBTM_SEC_DEV_REC *p_dev_rec); tBTM_SEC_DEV_REC *btm_sec_find_dev_by_sec_state (UINT8 state); static BOOLEAN btm_sec_set_security_level ( CONNECTION_TYPE conn_type, const char *p_name, UINT8 service_id, UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id, UINT32 mx_chan_id); #if (SMP_INCLUDED == TRUE) static BOOLEAN btm_dev_authenticated(tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_dev_encrypted(tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_dev_authorized(tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_serv_trusted(tBTM_SEC_DEV_REC *p_dev_rec, tBTM_SEC_SERV_REC *p_serv_rec); static BOOLEAN btm_sec_is_serv_level0 (UINT16 psm); static UINT16 btm_sec_set_serv_level4_flags (UINT16 cur_security, BOOLEAN is_originator); static BOOLEAN btm_sec_queue_encrypt_request (BD_ADDR bd_addr, tBT_TRANSPORT transport, tBTM_SEC_CALLBACK *p_callback, void *p_ref_data); static void btm_sec_check_pending_enc_req (tBTM_SEC_DEV_REC *p_dev_rec, tBT_TRANSPORT transport, UINT8 encr_enable); static BOOLEAN btm_sec_use_smp_br_chnl(tBTM_SEC_DEV_REC *p_dev_rec); static BOOLEAN btm_sec_is_master(tBTM_SEC_DEV_REC *p_dev_rec); #endif ///SMP_INCLUDED == TRUE /* TRUE - authenticated link key is possible */ static const BOOLEAN btm_sec_io_map [BTM_IO_CAP_MAX][BTM_IO_CAP_MAX] = { /* OUT, IO, IN, NONE */ /* OUT */ {FALSE, FALSE, TRUE, FALSE}, /* IO */ {FALSE, TRUE, TRUE, FALSE}, /* IN */ {TRUE, TRUE, TRUE, FALSE}, /* NONE */ {FALSE, FALSE, FALSE, FALSE} }; /* BTM_IO_CAP_OUT 0 DisplayOnly */ /* BTM_IO_CAP_IO 1 DisplayYesNo */ /* BTM_IO_CAP_IN 2 KeyboardOnly */ /* BTM_IO_CAP_NONE 3 NoInputNoOutput */ /******************************************************************************* ** ** Function btm_dev_authenticated ** ** Description check device is authenticated ** ** Returns BOOLEAN TRUE or FALSE ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static BOOLEAN btm_dev_authenticated (tBTM_SEC_DEV_REC *p_dev_rec) { if (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED) { return (TRUE); } return (FALSE); } /******************************************************************************* ** ** Function btm_dev_encrypted ** ** Description check device is encrypted ** ** Returns BOOLEAN TRUE or FALSE ** *******************************************************************************/ static BOOLEAN btm_dev_encrypted (tBTM_SEC_DEV_REC *p_dev_rec) { if (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) { return (TRUE); } return (FALSE); } /******************************************************************************* ** ** Function btm_dev_authorized ** ** Description check device is authorized ** ** Returns BOOLEAN TRUE or FALSE ** *******************************************************************************/ static BOOLEAN btm_dev_authorized (tBTM_SEC_DEV_REC *p_dev_rec) { if (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED) { return (TRUE); } return (FALSE); } /******************************************************************************* ** ** Function btm_dev_16_digit_authenticated ** ** Description check device is authenticated by using 16 digit pin or MITM ** ** Returns BOOLEAN TRUE or FALSE ** *******************************************************************************/ static BOOLEAN btm_dev_16_digit_authenticated(tBTM_SEC_DEV_REC *p_dev_rec) { // BTM_SEC_16_DIGIT_PIN_AUTHED is set if MITM or 16 digit pin is used if (p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED) { return (TRUE); } return (FALSE); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_serv_trusted ** ** Description check service is trusted ** ** Returns BOOLEAN TRUE or FALSE ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static BOOLEAN btm_serv_trusted(tBTM_SEC_DEV_REC *p_dev_rec, tBTM_SEC_SERV_REC *p_serv_rec) { if (BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask, p_serv_rec->service_id)) { return (TRUE); } return (FALSE); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_SecRegister ** ** Description Application manager calls this function to register for ** security services. There can be one and only one application ** saving link keys. BTM allows only first registration. ** ** Returns TRUE if registered OK, else FALSE ** *******************************************************************************/ BOOLEAN BTM_SecRegister(tBTM_APPL_INFO *p_cb_info) { #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE BT_OCTET16 temp_value = {0}; #endif BTM_TRACE_EVENT("%s application registered\n", __func__); #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE BTM_TRACE_DEBUG("%s p_cb_info->p_le_callback == 0x%p\n", __func__, p_cb_info->p_le_callback); if (p_cb_info->p_le_callback) { BTM_TRACE_EVENT("%s SMP_Register( btm_proc_smp_cback )\n", __func__); SMP_Register(btm_proc_smp_cback); /* if no IR is loaded, need to regenerate all the keys */ if (memcmp(btm_cb.devcb.id_keys.ir, &temp_value, sizeof(BT_OCTET16)) == 0) { btm_ble_reset_id(); } } else { BTM_TRACE_WARNING("%s p_cb_info->p_le_callback == NULL\n", __func__); } #endif btm_cb.api = *p_cb_info; #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE BTM_TRACE_DEBUG("%s btm_cb.api.p_le_callback = 0x%p\n", __func__, btm_cb.api.p_le_callback); #endif BTM_TRACE_EVENT("%s application registered\n", __func__); return (TRUE); } /******************************************************************************* ** ** Function BTM_SecRegisterLinkKeyNotificationCallback ** ** Description Application manager calls this function to register for ** link key notification. When there is nobody registered ** we should avoid changing link key ** ** Returns TRUE if registered OK, else FALSE ** *******************************************************************************/ BOOLEAN BTM_SecRegisterLinkKeyNotificationCallback (tBTM_LINK_KEY_CALLBACK *p_callback) { btm_cb.api.p_link_key_callback = p_callback; return TRUE; } /******************************************************************************* ** ** Function BTM_SecAddRmtNameNotifyCallback ** ** Description Any profile can register to be notified when name of the ** remote device is resolved. ** ** Returns TRUE if registered OK, else FALSE ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) || (CLASSIC_BT_INCLUDED == TRUE) BOOLEAN BTM_SecAddRmtNameNotifyCallback (tBTM_RMT_NAME_CALLBACK *p_callback) { int i; for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) { if (btm_cb.p_rmt_name_callback[i] == NULL) { btm_cb.p_rmt_name_callback[i] = p_callback; return (TRUE); } } return (FALSE); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_SecDeleteRmtNameNotifyCallback ** ** Description Any profile can deregister notification when a new Link Key ** is generated per connection. ** ** Returns TRUE if OK, else FALSE ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) || (CLASSIC_BT_INCLUDED == TRUE) BOOLEAN BTM_SecDeleteRmtNameNotifyCallback (tBTM_RMT_NAME_CALLBACK *p_callback) { int i; for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) { if (btm_cb.p_rmt_name_callback[i] == p_callback) { btm_cb.p_rmt_name_callback[i] = NULL; return (TRUE); } } return (FALSE); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_GetSecurityFlags ** ** Description Get security flags for the device ** ** Returns BOOLEAN TRUE or FALSE is device found ** *******************************************************************************/ BOOLEAN BTM_GetSecurityFlags (BD_ADDR bd_addr, UINT8 *p_sec_flags) { tBTM_SEC_DEV_REC *p_dev_rec; if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) { *p_sec_flags = (UINT8) p_dev_rec->sec_flags; return (TRUE); } BTM_TRACE_ERROR ("BTM_GetSecurityFlags false"); return (FALSE); } /******************************************************************************* ** ** Function BTM_GetSecurityFlagsByTransport ** ** Description Get security flags for the device on a particular transport ** ** Returns BOOLEAN TRUE or FALSE is device found ** *******************************************************************************/ BOOLEAN BTM_GetSecurityFlagsByTransport (BD_ADDR bd_addr, UINT8 *p_sec_flags, tBT_TRANSPORT transport) { tBTM_SEC_DEV_REC *p_dev_rec; if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) { if (transport == BT_TRANSPORT_BR_EDR) { *p_sec_flags = (UINT8) p_dev_rec->sec_flags; } else { *p_sec_flags = (UINT8) (p_dev_rec->sec_flags >> 8); } return (TRUE); } BTM_TRACE_ERROR ("BTM_GetSecurityFlags false\n"); return (FALSE); } /******************************************************************************* ** ** Function BTM_SetPinType ** ** Description Set PIN type for the device. ** ** Returns void ** *******************************************************************************/ void BTM_SetPinType (UINT8 pin_type, PIN_CODE pin_code, UINT8 pin_code_len) { BTM_TRACE_API ("BTM_SetPinType: pin type %d [variable-0, fixed-1], code %s, length %d\n", pin_type, (char *) pin_code, pin_code_len); /* If device is not up security mode will be set as a part of startup */ if ( (btm_cb.cfg.pin_type != pin_type) && controller_get_interface()->get_is_ready() ) { btsnd_hcic_write_pin_type (pin_type); } btm_cb.cfg.pin_type = pin_type; btm_cb.cfg.pin_code_len = pin_code_len; memcpy (btm_cb.cfg.pin_code, pin_code, pin_code_len); } /******************************************************************************* ** ** Function BTM_SetPairableMode ** ** Description Enable or disable pairing ** ** Parameters allow_pairing - (TRUE or FALSE) whether or not the device ** allows pairing. ** connect_only_paired - (TRUE or FALSE) whether or not to ** only allow paired devices to connect. ** ** Returns void ** *******************************************************************************/ void BTM_SetPairableMode (BOOLEAN allow_pairing, BOOLEAN connect_only_paired) { BTM_TRACE_API ("BTM_SetPairableMode() allow_pairing: %u connect_only_paired: %u\n", allow_pairing, connect_only_paired); btm_cb.pairing_disabled = !allow_pairing; btm_cb.connect_only_paired = connect_only_paired; } /******************************************************************************* ** ** Function BTM_SetSecureConnectionsOnly ** ** Description Enable or disable default treatment for Mode 4 Level 0 services ** ** Parameter secure_connections_only_mode - (TRUE or FALSE) whether or not the device ** TRUE means that the device should treat Mode 4 Level 0 services as ** services of other levels. (Secure_connections_only_mode) ** FALSE means that the device should provide default treatment for ** Mode 4 Level 0 services. ** ** Returns void ** *******************************************************************************/ void BTM_SetSecureConnectionsOnly (BOOLEAN secure_connections_only_mode) { BTM_TRACE_API("%s: Mode : %u\n", __FUNCTION__, secure_connections_only_mode); btm_cb.devcb.secure_connections_only = secure_connections_only_mode; btm_cb.security_mode = BTM_SEC_MODE_SC; } #define BTM_NO_AVAIL_SEC_SERVICES ((UINT16) 0xffff) /******************************************************************************* ** ** Function BTM_SetSecurityLevel ** ** Description Register service security level with Security Manager ** ** Parameters: is_originator - TRUE if originating the connection, FALSE if not ** p_name - Name of the service relevant only if ** authorization will show this name to user. ignored ** if BTM_SEC_SERVICE_NAME_LEN is 0. ** service_id - service ID for the service passed to authorization callback ** sec_level - bit mask of the security features ** psm - L2CAP PSM ** mx_proto_id - protocol ID of multiplexing proto below ** mx_chan_id - channel ID of multiplexing proto below ** ** Returns TRUE if registered OK, else FALSE ** *******************************************************************************/ BOOLEAN BTM_SetSecurityLevel (BOOLEAN is_originator, const char *p_name, UINT8 service_id, UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id, UINT32 mx_chan_id) { #if (L2CAP_UCD_INCLUDED == TRUE) CONNECTION_TYPE conn_type; if (is_originator) { conn_type = CONN_ORIENT_ORIG; } else { conn_type = CONN_ORIENT_TERM; } return (btm_sec_set_security_level (conn_type, p_name, service_id, sec_level, psm, mx_proto_id, mx_chan_id)); #else return (btm_sec_set_security_level (is_originator, p_name, service_id, sec_level, psm, mx_proto_id, mx_chan_id)); #endif } /******************************************************************************* ** ** Function btm_sec_set_security_level ** ** Description Register service security level with Security Manager ** ** Parameters: conn_type - TRUE if originating the connection, FALSE if not ** p_name - Name of the service relevant only if ** authorization will show this name to user. ignored ** if BTM_SEC_SERVICE_NAME_LEN is 0. ** service_id - service ID for the service passed to authorization callback ** sec_level - bit mask of the security features ** psm - L2CAP PSM ** mx_proto_id - protocol ID of multiplexing proto below ** mx_chan_id - channel ID of multiplexing proto below ** ** Returns TRUE if registered OK, else FALSE ** *******************************************************************************/ static BOOLEAN btm_sec_set_security_level (CONNECTION_TYPE conn_type, const char *p_name, UINT8 service_id, UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id, UINT32 mx_chan_id) { #if (SMP_INCLUDED == TRUE) tBTM_SEC_SERV_REC *p_srec; UINT16 index; UINT16 first_unused_record = BTM_NO_AVAIL_SEC_SERVICES; BOOLEAN record_allocated = FALSE; BOOLEAN is_originator; #if (L2CAP_UCD_INCLUDED == TRUE) BOOLEAN is_ucd; if (conn_type & CONNECTION_TYPE_ORIG_MASK) { is_originator = TRUE; } else { is_originator = FALSE; } if (conn_type & CONNECTION_TYPE_CONNLESS_MASK ) { is_ucd = TRUE; } else { is_ucd = FALSE; } #else is_originator = conn_type; #endif BTM_TRACE_API("%s : sec: 0x%x\n", __func__, sec_level); /* See if the record can be reused (same service name, psm, mx_proto_id, service_id, and mx_chan_id), or obtain the next unused record */ p_srec = &btm_cb.sec_serv_rec[0]; for (index = 0; index < BTM_SEC_MAX_SERVICE_RECORDS; index++, p_srec++) { /* Check if there is already a record for this service */ if (p_srec->security_flags & BTM_SEC_IN_USE) { #if BTM_SEC_SERVICE_NAME_LEN > 0 if (p_srec->psm == psm && p_srec->mx_proto_id == mx_proto_id && service_id == p_srec->service_id && (!strncmp (p_name, (char *) p_srec->orig_service_name, BTM_SEC_SERVICE_NAME_LEN) || !strncmp (p_name, (char *) p_srec->term_service_name, BTM_SEC_SERVICE_NAME_LEN))) #else if (p_srec->psm == psm && p_srec->mx_proto_id == mx_proto_id && service_id == p_srec->service_id) #endif { record_allocated = TRUE; break; } } /* Mark the first available service record */ else if (!record_allocated) { memset (p_srec, 0, sizeof(tBTM_SEC_SERV_REC)); record_allocated = TRUE; first_unused_record = index; } } if (!record_allocated) { BTM_TRACE_WARNING("BTM_SEC_REG: Out of Service Records (%d)\n", BTM_SEC_MAX_SERVICE_RECORDS); return (record_allocated); } /* Process the request if service record is valid */ /* If a duplicate service wasn't found, use the first available */ if (index >= BTM_SEC_MAX_SERVICE_RECORDS) { index = first_unused_record; p_srec = &btm_cb.sec_serv_rec[index]; } p_srec->psm = psm; p_srec->service_id = service_id; p_srec->mx_proto_id = mx_proto_id; if (is_originator) { p_srec->orig_mx_chan_id = mx_chan_id; #if BTM_SEC_SERVICE_NAME_LEN > 0 BCM_STRNCPY_S ((char *)p_srec->orig_service_name, sizeof(p_srec->orig_service_name), p_name, BTM_SEC_SERVICE_NAME_LEN); #endif /* clear out the old setting, just in case it exists */ #if (L2CAP_UCD_INCLUDED == TRUE) if ( is_ucd ) { p_srec->ucd_security_flags &= ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM | BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE); } else #endif { p_srec->security_flags &= ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM | BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE); } /* Parameter validation. Originator should not set requirements for incoming connections */ sec_level &= ~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM | BTM_SEC_IN_MIN_16_DIGIT_PIN ); if (btm_cb.security_mode == BTM_SEC_MODE_SP || btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG || btm_cb.security_mode == BTM_SEC_MODE_SC) { if (sec_level & BTM_SEC_OUT_AUTHENTICATE) { sec_level |= BTM_SEC_OUT_MITM; } } /* Make sure the authenticate bit is set, when encrypt bit is set */ if (sec_level & BTM_SEC_OUT_ENCRYPT) { sec_level |= BTM_SEC_OUT_AUTHENTICATE; } /* outgoing connections usually set the security level right before * the connection is initiated. * set it to be the outgoing service */ #if (L2CAP_UCD_INCLUDED == TRUE) if ( is_ucd == FALSE ) #endif { btm_cb.p_out_serv = p_srec; } } else { p_srec->term_mx_chan_id = mx_chan_id; #if BTM_SEC_SERVICE_NAME_LEN > 0 BCM_STRNCPY_S ((char *)p_srec->term_service_name, sizeof(p_srec->term_service_name), p_name, BTM_SEC_SERVICE_NAME_LEN); #endif /* clear out the old setting, just in case it exists */ #if (L2CAP_UCD_INCLUDED == TRUE) if ( is_ucd ) { p_srec->ucd_security_flags &= ~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM | BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE | BTM_SEC_IN_MIN_16_DIGIT_PIN); } else #endif { p_srec->security_flags &= ~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM | BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE | BTM_SEC_IN_MIN_16_DIGIT_PIN); } /* Parameter validation. Acceptor should not set requirements for outgoing connections */ sec_level &= ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM); if (btm_cb.security_mode == BTM_SEC_MODE_SP || btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG || btm_cb.security_mode == BTM_SEC_MODE_SC) { if (sec_level & BTM_SEC_IN_AUTHENTICATE) { sec_level |= BTM_SEC_IN_MITM; } } /* Make sure the authenticate bit is set, when encrypt bit is set */ if (sec_level & BTM_SEC_IN_ENCRYPT) { sec_level |= BTM_SEC_IN_AUTHENTICATE; } } #if (L2CAP_UCD_INCLUDED == TRUE) if ( is_ucd ) { p_srec->security_flags |= (UINT16)(BTM_SEC_IN_USE); p_srec->ucd_security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE); } else { p_srec->security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE); } BTM_TRACE_API("BTM_SEC_REG[%d]: id %d, conn_type 0x%x, psm 0x%04x, proto_id %d, chan_id %d\n", index, service_id, conn_type, psm, mx_proto_id, mx_chan_id); BTM_TRACE_API(" : security_flags: 0x%04x, ucd_security_flags: 0x%04x\n", p_srec->security_flags, p_srec->ucd_security_flags); #if BTM_SEC_SERVICE_NAME_LEN > 0 BTM_TRACE_API(" : service name [%s] (up to %d chars saved)\n", p_name, BTM_SEC_SERVICE_NAME_LEN); #endif #else p_srec->security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE); BTM_TRACE_API("BTM_SEC_REG[%d]: id %d, is_orig %d, psm 0x%04x, proto_id %d, chan_id %d\n", index, service_id, is_originator, psm, mx_proto_id, mx_chan_id); #if BTM_SEC_SERVICE_NAME_LEN > 0 BTM_TRACE_API(" : sec: 0x%x, service name [%s] (up to %d chars saved)\n", p_srec->security_flags, p_name, BTM_SEC_SERVICE_NAME_LEN); #endif #endif return (record_allocated); #else return FALSE; #endif ///SMP_INCLUDED == TRUE } /******************************************************************************* ** ** Function BTM_SecClrService ** ** Description Removes specified service record(s) from the security database. ** All service records with the specified name are removed. ** Typically used only by devices with limited RAM so that it can ** reuse an old security service record. ** ** Note: Unpredictable results may occur if a service is cleared ** that is still in use by an application/profile. ** ** Parameters Service ID - Id of the service to remove. ('0' removes all service ** records (except SDP). ** ** Returns Number of records that were freed. ** *******************************************************************************/ #if (SDP_INCLUDED == TRUE) UINT8 BTM_SecClrService (UINT8 service_id) { tBTM_SEC_SERV_REC *p_srec = &btm_cb.sec_serv_rec[0]; UINT8 num_freed = 0; int i; for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_srec++) { /* Delete services with specified name (if in use and not SDP) */ if ((p_srec->security_flags & BTM_SEC_IN_USE) && (p_srec->psm != BT_PSM_SDP) && (!service_id || (service_id == p_srec->service_id))) { BTM_TRACE_API("BTM_SEC_CLR[%d]: id %d\n", i, service_id); p_srec->security_flags = 0; #if (L2CAP_UCD_INCLUDED == TRUE) p_srec->ucd_security_flags = 0; #endif num_freed++; } } return (num_freed); } #endif ///SDP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_clr_service_by_psm ** ** Description Removes specified service record from the security database. ** All service records with the specified psm are removed. ** Typically used by L2CAP to free up the service record used ** by dynamic PSM clients when the channel is closed. ** The given psm must be a virtual psm. ** ** Parameters Service ID - Id of the service to remove. ('0' removes all service ** records (except SDP). ** ** Returns Number of records that were freed. ** *******************************************************************************/ #if (SDP_INCLUDED== TRUE) UINT8 btm_sec_clr_service_by_psm (UINT16 psm) { tBTM_SEC_SERV_REC *p_srec = &btm_cb.sec_serv_rec[0]; UINT8 num_freed = 0; int i; for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_srec++) { /* Delete services with specified name (if in use and not SDP) */ if ((p_srec->security_flags & BTM_SEC_IN_USE) && (p_srec->psm == psm) ) { BTM_TRACE_API("BTM_SEC_CLR[%d]: id %d\n", i, p_srec->service_id); p_srec->security_flags = 0; num_freed++; } } BTM_TRACE_API("btm_sec_clr_service_by_psm psm:0x%x num_freed:%d\n", psm, num_freed); return (num_freed); } #endif ///SDP_INCLUDED== TRUE /******************************************************************************* ** ** Function btm_sec_clr_temp_auth_service ** ** Description Removes specified device record's temporary authorization ** flag from the security database. ** ** Parameters Device address to be cleared ** ** Returns void. ** *******************************************************************************/ void btm_sec_clr_temp_auth_service (BD_ADDR bda) { tBTM_SEC_DEV_REC *p_dev_rec; if ((p_dev_rec = btm_find_dev (bda)) == NULL) { BTM_TRACE_WARNING ("btm_sec_clr_temp_auth_service() - no dev CB\n"); return; } /* Reset the temporary authorized flag so that next time (untrusted) service is accessed autorization will take place */ if (p_dev_rec->last_author_service_id != BTM_SEC_NO_LAST_SERVICE_ID && p_dev_rec->p_cur_service) { BTM_TRACE_DEBUG ("btm_sec_clr_auth_service_by_psm [clearing device: %02x:%02x:%02x:%02x:%02x:%02x]\n", bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]); p_dev_rec->last_author_service_id = BTM_SEC_NO_LAST_SERVICE_ID; } } /******************************************************************************* ** ** Function BTM_PINCodeReply ** ** Description This function is called after Security Manager submitted ** PIN code request to the UI. ** ** Parameters: bd_addr - Address of the device for which PIN was requested ** res - result of the operation BTM_SUCCESS if success ** pin_len - length in bytes of the PIN Code ** p_pin - pointer to array with the PIN Code ** trusted_mask - bitwise OR of trusted services (array of UINT32) ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void BTM_PINCodeReply (BD_ADDR bd_addr, UINT8 res, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[]) { tBTM_SEC_DEV_REC *p_dev_rec; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_API ("BTM_PINCodeReply(): PairState: %s PairFlags: 0x%02x PinLen:%d Result:%d\n", btm_pair_state_descr(btm_cb.pairing_state), btm_cb.pairing_flags, pin_len, res); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE /* If timeout already expired or has been canceled, ignore the reply */ if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_PIN) { BTM_TRACE_WARNING ("BTM_PINCodeReply() - Wrong State: %d\n", btm_cb.pairing_state); return; } if (memcmp (bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) != 0) { BTM_TRACE_ERROR ("BTM_PINCodeReply() - Wrong BD Addr\n"); return; } if ((p_dev_rec = btm_find_dev (bd_addr)) == NULL) { BTM_TRACE_ERROR ("BTM_PINCodeReply() - no dev CB\n"); return; } if ( (pin_len > PIN_CODE_LEN) || (pin_len == 0) || (p_pin == NULL) ) { res = BTM_ILLEGAL_VALUE; } if (res != BTM_SUCCESS) { /* if peer started dd OR we started dd and pre-fetch pin was not used send negative reply */ if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PEER_STARTED_DD) || ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE)) ) { /* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed event */ btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY; btsnd_hcic_pin_code_neg_reply (bd_addr); } else { p_dev_rec->security_required = BTM_SEC_NONE; btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); } return; } if (trusted_mask) { BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask); } p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED; if (pin_len >= 16) { p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED; } if ( (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) && (p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE) && (btm_cb.security_mode_changed == FALSE) ) { /* This is start of the dedicated bonding if local device is 2.0 */ btm_cb.pin_code_len = pin_len; p_dev_rec->pin_code_length = pin_len; memcpy (btm_cb.pin_code, p_pin, pin_len); btm_cb.security_mode_changed = TRUE; #ifdef APPL_AUTH_WRITE_EXCEPTION if (!(APPL_AUTH_WRITE_EXCEPTION)(p_dev_rec->bd_addr)) #endif { btsnd_hcic_write_auth_enable (TRUE); } btm_cb.acl_disc_reason = 0xff ; /* if we rejected incoming connection request, we have to wait HCI_Connection_Complete event */ /* before originating */ if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) { BTM_TRACE_WARNING ("BTM_PINCodeReply(): waiting HCI_Connection_Complete after rejected incoming connection\n"); /* we change state little bit early so btm_sec_connected() will originate connection */ /* when existing ACL link is down completely */ btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ); } /* if we already accepted incoming connection from pairing device */ else if (p_dev_rec->sm4 & BTM_SM4_CONN_PEND) { BTM_TRACE_WARNING ("BTM_PINCodeReply(): link is connecting so wait pin code request from peer\n"); btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ); } else if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) { btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_AUTHED; if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_ERR_AUTH_FAILURE); } } return; } btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); btm_cb.acl_disc_reason = HCI_SUCCESS; #ifdef PORCHE_PAIRING_CONFLICT BTM_TRACE_EVENT("BTM_PINCodeReply(): Saving pin_len: %d btm_cb.pin_code_len: %d\n", pin_len, btm_cb.pin_code_len); /* if this was not pre-fetched, save the PIN */ if (btm_cb.pin_code_len == 0) { memcpy (btm_cb.pin_code, p_pin, pin_len); } btm_cb.pin_code_len_saved = pin_len; #endif btsnd_hcic_pin_code_req_reply (bd_addr, pin_len, p_pin); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_bond_by_transport ** ** Description this is the bond function that will start either SSP or SMP. ** ** Parameters: bd_addr - Address of the device to bond ** pin_len - length in bytes of the PIN Code ** p_pin - pointer to array with the PIN Code ** trusted_mask - bitwise OR of trusted services (array of UINT32) ** ** Note: After 2.1 parameters are not used and preserved here not to change API *******************************************************************************/ #if (SMP_INCLUDED == TRUE) tBTM_STATUS btm_sec_bond_by_transport (BD_ADDR bd_addr, tBT_TRANSPORT transport, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[]) { tBTM_SEC_DEV_REC *p_dev_rec; tBTM_STATUS status; UINT8 *p_features; UINT8 ii; tACL_CONN *p = btm_bda_to_acl(bd_addr, transport); BTM_TRACE_API ("btm_sec_bond_by_transport BDA: %02x:%02x:%02x:%02x:%02x:%02x\n", bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5]); BTM_TRACE_DEBUG("btm_sec_bond_by_transport: Transport used %d\n" , transport); /* Other security process is in progress */ if (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_ERROR ("BTM_SecBond: already busy in state: %s\n", btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE return (BTM_WRONG_MODE); } if ((p_dev_rec = btm_find_or_alloc_dev (bd_addr)) == NULL) { return (BTM_NO_RESOURCES); } BTM_TRACE_DEBUG ("before update sec_flags=0x%x\n", p_dev_rec->sec_flags); /* Finished if connection is active and already paired */ if ( ((p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE) && transport == BT_TRANSPORT_BR_EDR && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) #if (BLE_INCLUDED == TRUE) || ((p_dev_rec->ble_hci_handle != BTM_SEC_INVALID_HANDLE) && transport == BT_TRANSPORT_LE && (p_dev_rec->sec_flags & BTM_SEC_LE_AUTHENTICATED)) #endif ) { BTM_TRACE_WARNING("BTM_SecBond -> Already Paired\n"); return (BTM_SUCCESS); } /* Tell controller to get rid of the link key if it has one stored */ if ((BTM_DeleteStoredLinkKey (bd_addr, NULL)) != BTM_SUCCESS) { return (BTM_NO_RESOURCES); } /* Save the PIN code if we got a valid one */ if (p_pin && (pin_len <= PIN_CODE_LEN) && (pin_len != 0)) { btm_cb.pin_code_len = pin_len; p_dev_rec->pin_code_length = pin_len; memcpy (btm_cb.pin_code, p_pin, PIN_CODE_LEN); } memcpy (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN); btm_cb.pairing_flags = BTM_PAIR_FLAGS_WE_STARTED_DD; p_dev_rec->security_required = BTM_SEC_OUT_AUTHENTICATE; p_dev_rec->is_originator = TRUE; if (trusted_mask) { BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask); } #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE if (transport == BT_TRANSPORT_LE) { btm_ble_init_pseudo_addr (p_dev_rec, bd_addr); p_dev_rec->sec_flags &= ~ BTM_SEC_LE_MASK; if (SMP_Pair(bd_addr) == SMP_STARTED) { btm_cb.pairing_flags |= BTM_PAIR_FLAGS_LE_ACTIVE; p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING; btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); return BTM_CMD_STARTED; } btm_cb.pairing_flags = 0; return (BTM_NO_RESOURCES); } #endif p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED | BTM_SEC_ROLE_SWITCHED | BTM_SEC_LINK_KEY_AUTHED); BTM_TRACE_DEBUG ("after update sec_flags=0x%x\n", p_dev_rec->sec_flags); if (!controller_get_interface()->supports_simple_pairing()) { /* The special case when we authenticate keyboard. Set pin type to fixed */ /* It would be probably better to do it from the application, but it is */ /* complicated */ if (((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) == BTM_COD_MAJOR_PERIPHERAL) && (p_dev_rec->dev_class[2] & BTM_COD_MINOR_KEYBOARD) && (btm_cb.cfg.pin_type != HCI_PIN_TYPE_FIXED)) { btm_cb.pin_type_changed = TRUE; btsnd_hcic_write_pin_type (HCI_PIN_TYPE_FIXED); } } for (ii = 0; ii <= HCI_EXT_FEATURES_PAGE_MAX; ii++) { p_features = p_dev_rec->features[ii]; BTM_TRACE_EVENT(" remote_features page[%1d] = %02x-%02x-%02x-%02x\n", ii, p_features[0], p_features[1], p_features[2], p_features[3]); BTM_TRACE_EVENT(" %02x-%02x-%02x-%02x\n", p_features[4], p_features[5], p_features[6], p_features[7]); } BTM_TRACE_EVENT ("BTM_SecBond: Remote sm4: 0x%x HCI Handle: 0x%04x\n", p_dev_rec->sm4, p_dev_rec->hci_handle); #if BTM_SEC_FORCE_RNR_FOR_DBOND == TRUE p_dev_rec->sec_flags &= ~BTM_SEC_NAME_KNOWN; #endif /* If connection already exists... */ if (p && p->hci_handle != BTM_SEC_INVALID_HANDLE) { if (!btm_sec_start_authentication (p_dev_rec)) { return (BTM_NO_RESOURCES); } btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ); /* Mark lcb as bonding */ l2cu_update_lcb_4_bonding (bd_addr, TRUE); return (BTM_CMD_STARTED); } BTM_TRACE_DEBUG ("sec mode: %d sm4:x%x\n", btm_cb.security_mode, p_dev_rec->sm4); if (!controller_get_interface()->supports_simple_pairing() || (p_dev_rec->sm4 == BTM_SM4_KNOWN)) { if ( btm_sec_check_prefetch_pin (p_dev_rec) ) { return (BTM_CMD_STARTED); } } if ((btm_cb.security_mode == BTM_SEC_MODE_SP || btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG || btm_cb.security_mode == BTM_SEC_MODE_SC) && BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) { /* local is 2.1 and peer is unknown */ if ((p_dev_rec->sm4 & BTM_SM4_CONN_PEND) == 0) { /* we are not accepting connection request from peer * -> RNR (to learn if peer is 2.1) * RNR when no ACL causes HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT */ btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME); BTM_ReadRemoteDeviceName(bd_addr, NULL, BT_TRANSPORT_BR_EDR); } else { /* We are accepting connection request from peer */ btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ); } #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_DEBUG ("State:%s sm4: 0x%x sec_state:%d\n", btm_pair_state_descr (btm_cb.pairing_state), p_dev_rec->sm4, p_dev_rec->sec_state); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE return BTM_CMD_STARTED; } /* both local and peer are 2.1 */ status = btm_sec_dd_create_conn(p_dev_rec); if (status != BTM_CMD_STARTED) { btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); } return status; } /******************************************************************************* ** ** Function BTM_SecBondByTransport ** ** Description This function is called to perform bonding with peer device. ** If the connection is already up, but not secure, pairing ** is attempted. If already paired BTM_SUCCESS is returned. ** ** Parameters: bd_addr - Address of the device to bond ** transport - doing SSP over BR/EDR or SMP over LE ** pin_len - length in bytes of the PIN Code ** p_pin - pointer to array with the PIN Code ** trusted_mask - bitwise OR of trusted services (array of UINT32) ** ** Note: After 2.1 parameters are not used and preserved here not to change API *******************************************************************************/ tBTM_STATUS BTM_SecBondByTransport (BD_ADDR bd_addr, tBT_TRANSPORT transport, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[]) { tBT_DEVICE_TYPE dev_type; tBLE_ADDR_TYPE addr_type; BTM_ReadDevInfo(bd_addr, &dev_type, &addr_type); /* LE device, do SMP pairing */ if ((transport == BT_TRANSPORT_LE && (dev_type & BT_DEVICE_TYPE_BLE) == 0) || (transport == BT_TRANSPORT_BR_EDR && (dev_type & BT_DEVICE_TYPE_BREDR) == 0)) { return BTM_ILLEGAL_ACTION; } return btm_sec_bond_by_transport(bd_addr, transport, pin_len, p_pin, trusted_mask); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_SecBond ** ** Description This function is called to perform bonding with peer device. ** If the connection is already up, but not secure, pairing ** is attempted. If already paired BTM_SUCCESS is returned. ** ** Parameters: bd_addr - Address of the device to bond ** pin_len - length in bytes of the PIN Code ** p_pin - pointer to array with the PIN Code ** trusted_mask - bitwise OR of trusted services (array of UINT32) ** ** Note: After 2.1 parameters are not used and preserved here not to change API *******************************************************************************/ #if (SMP_INCLUDED == TRUE) tBTM_STATUS BTM_SecBond (BD_ADDR bd_addr, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[]) { tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR; if (BTM_UseLeLink(bd_addr)) { transport = BT_TRANSPORT_LE; } return btm_sec_bond_by_transport(bd_addr, transport, pin_len, p_pin, trusted_mask); } /******************************************************************************* ** ** Function BTM_SecBondCancel ** ** Description This function is called to cancel ongoing bonding process ** with peer device. ** ** Parameters: bd_addr - Address of the peer device ** transport - FALSE for BR/EDR link; TRUE for LE link ** *******************************************************************************/ tBTM_STATUS BTM_SecBondCancel (BD_ADDR bd_addr) { tBTM_SEC_DEV_REC *p_dev_rec; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_API ("BTM_SecBondCancel() State: %s flags:0x%x\n", btm_pair_state_descr (btm_cb.pairing_state), btm_cb.pairing_flags); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE if (((p_dev_rec = btm_find_dev (bd_addr)) == NULL) || (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) { return BTM_UNKNOWN_ADDR; } #if SMP_INCLUDED == TRUE if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_LE_ACTIVE) { if (p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING) { BTM_TRACE_DEBUG ("Cancel LE pairing\n"); if (SMP_PairCancel(bd_addr)) { return BTM_CMD_STARTED; } } return BTM_WRONG_MODE; } #endif BTM_TRACE_DEBUG ("hci_handle:0x%x sec_state:%d\n", p_dev_rec->hci_handle, p_dev_rec->sec_state ); if (BTM_PAIR_STATE_WAIT_LOCAL_PIN == btm_cb.pairing_state && BTM_PAIR_FLAGS_WE_STARTED_DD & btm_cb.pairing_flags) { /* pre-fetching pin for dedicated bonding */ btm_sec_bond_cancel_complete(); return BTM_SUCCESS; } /* If this BDA is in a bonding procedure */ if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)) { /* If the HCI link is up */ if (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE) { /* If some other thread disconnecting, we do not send second command */ if ((p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING) || (p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING_BOTH)) { return (BTM_CMD_STARTED); } /* If the HCI link was set up by Bonding process */ if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) { return btm_sec_send_hci_disconnect(p_dev_rec, HCI_ERR_PEER_USER, p_dev_rec->hci_handle); } else { l2cu_update_lcb_4_bonding(bd_addr, FALSE); } return BTM_NOT_AUTHORIZED; } else { /*HCI link is not up */ /* If the HCI link creation was started by Bonding process */ if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) { if (btsnd_hcic_create_conn_cancel(bd_addr)) { return BTM_CMD_STARTED; } return BTM_NO_RESOURCES; } if (btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME) { BTM_CancelRemoteDeviceName(); btm_cb.pairing_flags |= BTM_PAIR_FLAGS_WE_CANCEL_DD; return BTM_CMD_STARTED; } return BTM_NOT_AUTHORIZED; } } return BTM_WRONG_MODE; } /******************************************************************************* ** ** Function BTM_SecGetDeviceLinkKey ** ** Description This function is called to obtain link key for the device ** it returns BTM_SUCCESS if link key is available, or ** BTM_UNKNOWN_ADDR if Security Manager does not know about ** the device or device record does not contain link key info ** ** Parameters: bd_addr - Address of the device ** link_key - Link Key is copied into this array ** *******************************************************************************/ tBTM_STATUS BTM_SecGetDeviceLinkKey (BD_ADDR bd_addr, LINK_KEY link_key) { tBTM_SEC_DEV_REC *p_dev_rec; if (((p_dev_rec = btm_find_dev (bd_addr)) != NULL) && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) { memcpy (link_key, p_dev_rec->link_key, LINK_KEY_LEN); return (BTM_SUCCESS); } return (BTM_UNKNOWN_ADDR); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_SecGetDeviceLinkKeyType ** ** Description This function is called to obtain link key type for the ** device. ** it returns BTM_SUCCESS if link key is available, or ** BTM_UNKNOWN_ADDR if Security Manager does not know about ** the device or device record does not contain link key info ** ** Returns BTM_LKEY_TYPE_IGNORE if link key is unknown, link type ** otherwise. ** *******************************************************************************/ tBTM_LINK_KEY_TYPE BTM_SecGetDeviceLinkKeyType (BD_ADDR bd_addr) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); if ((p_dev_rec != NULL) && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) { return p_dev_rec->link_key_type; } return BTM_LKEY_TYPE_IGNORE; } /******************************************************************************* ** ** Function BTM_SetEncryption ** ** Description This function is called to ensure that connection is ** encrypted. Should be called only on an open connection. ** Typically only needed for connections that first want to ** bring up unencrypted links, then later encrypt them. ** ** Parameters: bd_addr - Address of the peer device ** p_callback - Pointer to callback function called if ** this function returns PENDING after required ** procedures are completed. Can be set to NULL ** if status is not desired. ** p_ref_data - pointer to any data the caller wishes to receive ** in the callback function upon completion. * can be set to NULL if not used. ** transport - TRUE to encryption the link over LE transport ** or FALSE for BR/EDR transport ** ** Returns BTM_SUCCESS - already encrypted ** BTM_PENDING - command will be returned in the callback ** BTM_WRONG_MODE- connection not up. ** BTM_BUSY - security procedures are currently active ** BTM_MODE_UNSUPPORTED - if security manager not linked in. ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) tBTM_STATUS BTM_SetEncryption (BD_ADDR bd_addr, tBT_TRANSPORT transport, tBTM_SEC_CBACK *p_callback, void *p_ref_data) { tBTM_STATUS rc = 0; tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); if (!p_dev_rec || (transport == BT_TRANSPORT_BR_EDR && p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE) #if BLE_INCLUDED == TRUE || (transport == BT_TRANSPORT_LE && p_dev_rec->ble_hci_handle == BTM_SEC_INVALID_HANDLE) #endif ) { /* Connection should be up and runnning */ BTM_TRACE_WARNING ("Security Manager: BTM_SetEncryption not connected\n"); if (p_callback) { (*p_callback) (bd_addr, transport, p_ref_data, BTM_WRONG_MODE); } return (BTM_WRONG_MODE); } if ((transport == BT_TRANSPORT_BR_EDR && (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED)) #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE || (transport == BT_TRANSPORT_LE && (p_dev_rec->sec_flags & BTM_SEC_LE_ENCRYPTED)) #endif ) { BTM_TRACE_EVENT ("Security Manager: BTM_SetEncryption already encrypted\n"); if (p_callback) { (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS); } return (BTM_SUCCESS); } p_dev_rec->enc_init_by_we = TRUE; /* enqueue security request if security is active */ if (p_dev_rec->p_callback || (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE)) { BTM_TRACE_WARNING ("Security Manager: BTM_SetEncryption busy, enqueue request\n"); if (btm_sec_queue_encrypt_request(bd_addr, transport, p_callback, p_ref_data)) { return BTM_CMD_STARTED; } else { if (p_callback) { (*p_callback) (bd_addr, transport, p_ref_data, BTM_NO_RESOURCES); } return BTM_NO_RESOURCES; } } p_dev_rec->p_callback = p_callback; p_dev_rec->p_ref_data = p_ref_data; p_dev_rec->security_required |= (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT); p_dev_rec->is_originator = FALSE; BTM_TRACE_API ("Security Manager: BTM_SetEncryption Handle:%d State:%d Flags:0x%x Required:0x%x\n", p_dev_rec->hci_handle, p_dev_rec->sec_state, p_dev_rec->sec_flags, p_dev_rec->security_required); #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE if (transport == BT_TRANSPORT_LE) { tACL_CONN *p = btm_bda_to_acl(bd_addr, transport); if (p) { rc = btm_ble_set_encryption(bd_addr, p_ref_data, p->link_role); } else { rc = BTM_WRONG_MODE; BTM_TRACE_WARNING("%s: cannot call btm_ble_set_encryption, p is NULL\n", __FUNCTION__); } } else #endif { rc = btm_sec_execute_procedure (p_dev_rec); } if (rc != BTM_CMD_STARTED && rc != BTM_BUSY) { if (p_callback) { p_dev_rec->p_callback = NULL; (*p_callback) (bd_addr, transport, p_dev_rec->p_ref_data, rc); } } return (rc); } /******************************************************************************* * disconnect the ACL link, if it's not done yet. *******************************************************************************/ static tBTM_STATUS btm_sec_send_hci_disconnect (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 reason, UINT16 conn_handle) { UINT8 old_state = p_dev_rec->sec_state; tBTM_STATUS status = BTM_CMD_STARTED; BTM_TRACE_EVENT ("btm_sec_send_hci_disconnect: handle:0x%x, reason=0x%x\n", conn_handle, reason); /* send HCI_Disconnect on a transport only once */ switch (old_state) { case BTM_SEC_STATE_DISCONNECTING: if (conn_handle == p_dev_rec->hci_handle) { return status; } p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH; break; #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE case BTM_SEC_STATE_DISCONNECTING_BLE: if (conn_handle == p_dev_rec->ble_hci_handle) { return status; } p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH; break; case BTM_SEC_STATE_DISCONNECTING_BOTH: return status; #endif default: p_dev_rec->sec_state = (conn_handle == p_dev_rec->hci_handle) ? BTM_SEC_STATE_DISCONNECTING : BTM_SEC_STATE_DISCONNECTING_BLE; break; } /* If a role switch is in progress, delay the HCI Disconnect to avoid controller problem */ if (p_dev_rec->rs_disc_pending == BTM_SEC_RS_PENDING && p_dev_rec->hci_handle == conn_handle) { BTM_TRACE_DEBUG("RS in progress - Set DISC Pending flag in btm_sec_send_hci_disconnect to delay disconnect\n"); p_dev_rec->rs_disc_pending = BTM_SEC_DISC_PENDING; status = BTM_SUCCESS; } /* Tear down the HCI link */ else if (!btsnd_hcic_disconnect (conn_handle, reason)) { /* could not send disconnect. restore old state */ p_dev_rec->sec_state = old_state; status = BTM_NO_RESOURCES; } return status; } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_ConfirmReqReply ** ** Description This function is called to confirm the numeric value for ** Simple Pairing in response to BTM_SP_CFM_REQ_EVT ** ** Parameters: res - result of the operation BTM_SUCCESS if success ** bd_addr - Address of the peer device ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void BTM_ConfirmReqReply(tBTM_STATUS res, BD_ADDR bd_addr) { tBTM_SEC_DEV_REC *p_dev_rec; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("BTM_ConfirmReqReply() State: %s Res: %u", btm_pair_state_descr(btm_cb.pairing_state), res); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE /* If timeout already expired or has been canceled, ignore the reply */ if ( (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM) || (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) { return; } btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); if ( (res == BTM_SUCCESS) || (res == BTM_SUCCESS_NO_SECURITY) ) { btm_cb.acl_disc_reason = HCI_SUCCESS; if (res == BTM_SUCCESS) { if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) { p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED; } p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED; } btsnd_hcic_user_conf_reply (bd_addr, TRUE); } else { /* Report authentication failed event from state BTM_PAIR_STATE_WAIT_AUTH_COMPLETE */ btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY; btsnd_hcic_user_conf_reply (bd_addr, FALSE); } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_PasskeyReqReply ** ** Description This function is called to provide the passkey for ** Simple Pairing in response to BTM_SP_KEY_REQ_EVT ** ** Parameters: res - result of the operation BTM_SUCCESS if success ** bd_addr - Address of the peer device ** passkey - numeric value in the range of ** BTM_MIN_PASSKEY_VAL(0) - BTM_MAX_PASSKEY_VAL(999999(0xF423F)). ** *******************************************************************************/ #if (BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE) void BTM_PasskeyReqReply(tBTM_STATUS res, BD_ADDR bd_addr, UINT32 passkey) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_API ("BTM_PasskeyReqReply: State: %s res:%d\n", btm_pair_state_descr(btm_cb.pairing_state), res); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE if ( (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) || (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) { return; } /* If timeout already expired or has been canceled, ignore the reply */ if ( (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_AUTH_COMPLETE) && (res != BTM_SUCCESS) ) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); if (p_dev_rec != NULL) { btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY; if (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE) { btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle); } else { BTM_SecBondCancel(bd_addr); } p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_AUTHED | BTM_SEC_LINK_KEY_KNOWN); btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); return; } } else if (btm_cb.pairing_state != BTM_PAIR_STATE_KEY_ENTRY) { return; } if (passkey > BTM_MAX_PASSKEY_VAL) { res = BTM_ILLEGAL_VALUE; } btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); if (res != BTM_SUCCESS) { /* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed event */ btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY; btsnd_hcic_user_passkey_neg_reply (bd_addr); } else { btm_cb.acl_disc_reason = HCI_SUCCESS; btsnd_hcic_user_passkey_reply (bd_addr, passkey); } } #endif ///BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_SendKeypressNotif ** ** Description This function is used during the passkey entry model ** by a device with KeyboardOnly IO capabilities ** (very likely to be a HID Device). ** It is called by a HID Device to inform the remote device when ** a key has been entered or erased. ** ** Parameters: bd_addr - Address of the peer device ** type - notification type ** *******************************************************************************/ #if (BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE) void BTM_SendKeypressNotif(BD_ADDR bd_addr, tBTM_SP_KEY_TYPE type) { /* This API only make sense between PASSKEY_REQ and SP complete */ if (btm_cb.pairing_state == BTM_PAIR_STATE_KEY_ENTRY) { btsnd_hcic_send_keypress_notif (bd_addr, type); } } #endif ///BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE #if BTM_OOB_INCLUDED == TRUE && SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_IoCapRsp ** ** Description This function is called in response to BTM_SP_IO_REQ_EVT ** When the event data io_req.oob_data is set to BTM_OOB_UNKNOWN ** by the tBTM_SP_CALLBACK implementation, this function is ** called to provide the actual response ** ** Parameters: bd_addr - Address of the peer device ** io_cap - The IO capability of local device. ** oob - BTM_OOB_NONE or BTM_OOB_PRESENT. ** auth_req- MITM protection required or not. ** *******************************************************************************/ void BTM_IoCapRsp(BD_ADDR bd_addr, tBTM_IO_CAP io_cap, tBTM_OOB_DATA oob, tBTM_AUTH_REQ auth_req) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("BTM_IoCapRsp: state: %s oob: %d io_cap: %d\n", btm_pair_state_descr(btm_cb.pairing_state), oob, io_cap); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE if ( (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS) || (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) { return; } if (oob < BTM_OOB_UNKNOWN && io_cap < BTM_IO_CAP_MAX) { btm_cb.devcb.loc_auth_req = auth_req; btm_cb.devcb.loc_io_caps = io_cap; if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) { auth_req = (BTM_AUTH_DD_BOND | (auth_req & BTM_AUTH_YN_BIT)); } btsnd_hcic_io_cap_req_reply (bd_addr, io_cap, oob, auth_req); } } /******************************************************************************* ** ** Function BTM_ReadLocalOobData ** ** Description This function is called to read the local OOB data from ** LM ** *******************************************************************************/ tBTM_STATUS BTM_ReadLocalOobData(void) { tBTM_STATUS status = BTM_SUCCESS; if (btsnd_hcic_read_local_oob_data() == FALSE) { status = BTM_NO_RESOURCES; } return status; } /******************************************************************************* ** ** Function BTM_RemoteOobDataReply ** ** Description This function is called to provide the remote OOB data for ** Simple Pairing in response to BTM_SP_RMT_OOB_EVT ** ** Parameters: bd_addr - Address of the peer device ** c - simple pairing Hash C. ** r - simple pairing Randomizer C. ** *******************************************************************************/ void BTM_RemoteOobDataReply(tBTM_STATUS res, BD_ADDR bd_addr, BT_OCTET16 c, BT_OCTET16 r) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("%s() - State: %s res: %d\n", __func__, btm_pair_state_descr(btm_cb.pairing_state), res); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE /* If timeout already expired or has been canceled, ignore the reply */ if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP) { return; } btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); if (res != BTM_SUCCESS) { /* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed event */ btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY; btsnd_hcic_rem_oob_neg_reply (bd_addr); } else { btm_cb.acl_disc_reason = HCI_SUCCESS; btsnd_hcic_rem_oob_reply (bd_addr, c, r); } } /******************************************************************************* ** ** Function BTM_BuildOobData ** ** Description This function is called to build the OOB data payload to ** be sent over OOB (non-Bluetooth) link ** ** Parameters: p_data - the location for OOB data ** max_len - p_data size. ** c - simple pairing Hash C. ** r - simple pairing Randomizer C. ** name_len- 0, local device name would not be included. ** otherwise, the local device name is included for ** up to this specified length ** ** Returns Number of bytes in p_data. ** *******************************************************************************/ UINT16 BTM_BuildOobData(UINT8 *p_data, UINT16 max_len, BT_OCTET16 c, BT_OCTET16 r, UINT8 name_len) { UINT8 *p = p_data; UINT16 len = 0; #if BTM_MAX_LOC_BD_NAME_LEN > 0 UINT16 name_size; UINT8 name_type = BTM_EIR_SHORTENED_LOCAL_NAME_TYPE; #endif if (p_data && max_len >= BTM_OOB_MANDATORY_SIZE) { /* add mandatory part */ UINT16_TO_STREAM(p, len); BDADDR_TO_STREAM(p, controller_get_interface()->get_address()->address); len = BTM_OOB_MANDATORY_SIZE; max_len -= len; /* now optional part */ /* add Hash C */ UINT16 delta = BTM_OOB_HASH_C_SIZE + 2; if (max_len >= delta) { *p++ = BTM_OOB_HASH_C_SIZE + 1; *p++ = BTM_EIR_OOB_SSP_HASH_C_TYPE; ARRAY_TO_STREAM(p, c, BTM_OOB_HASH_C_SIZE); len += delta; max_len -= delta; } /* add Rand R */ delta = BTM_OOB_RAND_R_SIZE + 2; if (max_len >= delta) { *p++ = BTM_OOB_RAND_R_SIZE + 1; *p++ = BTM_EIR_OOB_SSP_RAND_R_TYPE; ARRAY_TO_STREAM(p, r, BTM_OOB_RAND_R_SIZE); len += delta; max_len -= delta; } /* add class of device */ delta = BTM_OOB_COD_SIZE + 2; if (max_len >= delta) { *p++ = BTM_OOB_COD_SIZE + 1; *p++ = BTM_EIR_OOB_COD_TYPE; DEVCLASS_TO_STREAM(p, btm_cb.devcb.dev_class); len += delta; max_len -= delta; } #if BTM_MAX_LOC_BD_NAME_LEN > 0 name_size = name_len; if (name_size > strlen(btm_cb.cfg.bd_name)) { name_type = BTM_EIR_COMPLETE_LOCAL_NAME_TYPE; name_size = (UINT16)strlen(btm_cb.cfg.bd_name); } delta = name_size + 2; if (max_len >= delta) { *p++ = name_size + 1; *p++ = name_type; ARRAY_TO_STREAM (p, btm_cb.cfg.bd_name, name_size); len += delta; max_len -= delta; } #endif /* update len */ p = p_data; UINT16_TO_STREAM(p, len); } return len; } /******************************************************************************* ** ** Function BTM_BothEndsSupportSecureConnections ** ** Description This function is called to check if both the local device and the peer device ** specified by bd_addr support BR/EDR Secure Connections. ** ** Parameters: bd_addr - address of the peer ** ** Returns TRUE if BR/EDR Secure Connections are supported by both local ** and the remote device. ** else FALSE. ** *******************************************************************************/ BOOLEAN BTM_BothEndsSupportSecureConnections(BD_ADDR bd_addr) { return ((controller_get_interface()->supports_secure_connections()) && (BTM_PeerSupportsSecureConnections(bd_addr))); } /******************************************************************************* ** ** Function BTM_PeerSupportsSecureConnections ** ** Description This function is called to check if the peer supports ** BR/EDR Secure Connections. ** ** Parameters: bd_addr - address of the peer ** ** Returns TRUE if BR/EDR Secure Connections are supported by the peer, ** else FALSE. ** *******************************************************************************/ BOOLEAN BTM_PeerSupportsSecureConnections(BD_ADDR bd_addr) { tBTM_SEC_DEV_REC *p_dev_rec; if ((p_dev_rec = btm_find_dev(bd_addr)) == NULL) { BTM_TRACE_WARNING("%s: unknown BDA: %08x%04x\n", __FUNCTION__, (bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3], (bd_addr[4] << 8) + bd_addr[5]); return FALSE; } return (p_dev_rec->remote_supports_secure_connections); } /******************************************************************************* ** ** Function BTM_ReadOobData ** ** Description This function is called to parse the OOB data payload ** received over OOB (non-Bluetooth) link ** ** Parameters: p_data - the location for OOB data ** eir_tag - The associated EIR tag to read the data. ** *p_len(output) - the length of the data with the given tag. ** ** Returns the beginning of the data with the given tag. ** NULL, if the tag is not found. ** *******************************************************************************/ UINT8 *BTM_ReadOobData(UINT8 *p_data, UINT8 eir_tag, UINT8 *p_len) { UINT8 *p = p_data; UINT16 max_len; UINT8 len, type; UINT8 *p_ret = NULL; UINT8 ret_len = 0; if (p_data) { STREAM_TO_UINT16(max_len, p); if (max_len >= BTM_OOB_MANDATORY_SIZE) { if (BTM_EIR_OOB_BD_ADDR_TYPE == eir_tag) { p_ret = p; /* the location for bd_addr */ ret_len = BTM_OOB_BD_ADDR_SIZE; } else { p += BD_ADDR_LEN; max_len -= BTM_OOB_MANDATORY_SIZE; /* now the optional data in EIR format */ while (max_len > 0) { len = *p++; /* tag data len + 1 */ type = *p++; if (eir_tag == type) { p_ret = p; ret_len = len - 1; break; } /* the data size of this tag is len + 1 (tag data len + 2) */ if (max_len > len) { max_len -= len; max_len--; len--; p += len; } else { max_len = 0; } } } } } if (p_len) { *p_len = ret_len; } return p_ret; } #endif ///BTM_OOB_INCLUDED == TRUE && SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_SetOutService ** ** Description This function is called to set the service for ** outgoing connections. ** ** If the profile/application calls BTM_SetSecurityLevel ** before initiating a connection, this function does not ** need to be called. ** ** Returns void ** *******************************************************************************/ #if (CLASSIC_BT_INCLUDED == TRUE) void BTM_SetOutService(BD_ADDR bd_addr, UINT8 service_id, UINT32 mx_chan_id) { tBTM_SEC_DEV_REC *p_dev_rec; tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0]; btm_cb.p_out_serv = p_serv_rec; p_dev_rec = btm_find_dev (bd_addr); for (int i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) { if ((p_serv_rec->security_flags & BTM_SEC_IN_USE) && (p_serv_rec->service_id == service_id) && (p_serv_rec->orig_mx_chan_id == mx_chan_id)) { BTM_TRACE_API("BTM_SetOutService p_out_serv id %d, psm 0x%04x, proto_id %d, chan_id %d\n", p_serv_rec->service_id, p_serv_rec->psm, p_serv_rec->mx_proto_id, p_serv_rec->orig_mx_chan_id); btm_cb.p_out_serv = p_serv_rec; if (p_dev_rec) { p_dev_rec->p_cur_service = p_serv_rec; } break; } } } #endif ///CLASSIC_BT_INCLUDED == TRUE /************************************************************************ ** I N T E R N A L F U N C T I O N S *************************************************************************/ /******************************************************************************* ** ** Function btm_sec_is_upgrade_possible ** ** Description This function returns TRUE if the existing link key ** can be upgraded or if the link key does not exist. ** ** Returns BOOLEAN ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static BOOLEAN btm_sec_is_upgrade_possible(tBTM_SEC_DEV_REC *p_dev_rec, BOOLEAN is_originator) { UINT16 mtm_check = is_originator ? BTM_SEC_OUT_MITM : BTM_SEC_IN_MITM; BOOLEAN is_possible = TRUE; if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) { is_possible = FALSE; if (p_dev_rec->p_cur_service) { BTM_TRACE_DEBUG ("%s() id: %d, link_key_typet: %d, rmt_io_caps: %d, chk flags: 0x%x, flags: 0x%x\n", __func__, p_dev_rec->p_cur_service->service_id, p_dev_rec->link_key_type, p_dev_rec->rmt_io_caps, mtm_check, p_dev_rec->p_cur_service->security_flags); } else { BTM_TRACE_DEBUG ("%s() link_key_typet: %d, rmt_io_caps: %d, chk flags: 0x%x\n", __func__, p_dev_rec->link_key_type, p_dev_rec->rmt_io_caps, mtm_check); } /* Already have a link key to the connected peer. Is the link key secure enough? ** Is a link key upgrade even possible? */ if ((p_dev_rec->security_required & mtm_check) /* needs MITM */ && ((p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB) || (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256)) /* has unauthenticated link key */ && (p_dev_rec->rmt_io_caps < BTM_IO_CAP_MAX) /* a valid peer IO cap */ && (btm_sec_io_map[p_dev_rec->rmt_io_caps][btm_cb.devcb.loc_io_caps])) /* authenticated link key is possible */ { /* upgrade is possible: check if the application wants the upgrade. * If the application is configured to use a global MITM flag, * it probably would not want to upgrade the link key based on the security level database */ is_possible = TRUE; } } BTM_TRACE_DEBUG ("%s() is_possible: %d sec_flags: 0x%x\n", __func__, is_possible, p_dev_rec->sec_flags); return is_possible; } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_check_upgrade ** ** Description This function is called to check if the existing link key ** needs to be upgraded. ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_sec_check_upgrade(tBTM_SEC_DEV_REC *p_dev_rec, BOOLEAN is_originator) { BTM_TRACE_DEBUG ("%s()\n", __func__); /* Only check if link key already exists */ if (!(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) { return; } if (btm_sec_is_upgrade_possible (p_dev_rec, is_originator) == TRUE) { BTM_TRACE_DEBUG ("need upgrade!! sec_flags:0x%x\n", p_dev_rec->sec_flags); /* upgrade is possible: check if the application wants the upgrade. * If the application is configured to use a global MITM flag, * it probably would not want to upgrade the link key based on the security level database */ tBTM_SP_UPGRADE evt_data; memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN); evt_data.upgrade = TRUE; if (btm_cb.api.p_sp_callback) { (*btm_cb.api.p_sp_callback) (BTM_SP_UPGRADE_EVT, (tBTM_SP_EVT_DATA *)&evt_data); } BTM_TRACE_DEBUG ("evt_data.upgrade:0x%x\n", evt_data.upgrade); if (evt_data.upgrade) { /* if the application confirms the upgrade, set the upgrade bit */ p_dev_rec->sm4 |= BTM_SM4_UPGRADE; /* Clear the link key known to go through authentication/pairing again */ p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED); p_dev_rec->sec_flags &= ~BTM_SEC_AUTHENTICATED; BTM_TRACE_DEBUG ("sec_flags:0x%x\n", p_dev_rec->sec_flags); } } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_l2cap_access_req ** ** Description This function is called by the L2CAP to grant permission to ** establish L2CAP connection to or from the peer device. ** ** Parameters: bd_addr - Address of the peer device ** psm - L2CAP PSM ** is_originator - TRUE if protocol above L2CAP originates ** connection ** p_callback - Pointer to callback function called if ** this function returns PENDING after required ** procedures are complete. MUST NOT BE NULL. ** ** Returns tBTM_STATUS ** *******************************************************************************/ tBTM_STATUS btm_sec_l2cap_access_req (BD_ADDR bd_addr, UINT16 psm, UINT16 handle, CONNECTION_TYPE conn_type, tBTM_SEC_CALLBACK *p_callback, void *p_ref_data) { #if (SMP_INCLUDED == TRUE) tBTM_SEC_DEV_REC *p_dev_rec; tBTM_SEC_SERV_REC *p_serv_rec; UINT16 security_required; UINT16 old_security_required; BOOLEAN old_is_originator; tBTM_STATUS rc = BTM_SUCCESS; BOOLEAN chk_acp_auth_done = FALSE; BOOLEAN is_originator; BOOLEAN transport = FALSE; /* should check PSM range in LE connection oriented L2CAP connection */ #if (L2CAP_UCD_INCLUDED == TRUE) if (conn_type & CONNECTION_TYPE_ORIG_MASK) { is_originator = TRUE; } else { is_originator = FALSE; } BTM_TRACE_DEBUG ("%s() conn_type: 0x%x, %p\n", __func__, conn_type, p_ref_data); #else is_originator = conn_type; BTM_TRACE_DEBUG ("%s() is_originator:%d, %p\n", __func__, is_originator, p_ref_data); #endif /* Find or get oldest record */ p_dev_rec = btm_find_or_alloc_dev (bd_addr); p_dev_rec->hci_handle = handle; /* Find the service record for the PSM */ p_serv_rec = btm_sec_find_first_serv (conn_type, psm); /* If there is no application registered with this PSM do not allow connection */ if (!p_serv_rec) { BTM_TRACE_WARNING ("%s() PSM: %d no application registerd\n", __func__, psm); (*p_callback) (bd_addr, transport, p_ref_data, BTM_MODE_UNSUPPORTED); return (BTM_MODE_UNSUPPORTED); } /* Services level0 by default have no security */ if ((btm_sec_is_serv_level0(psm)) && (!btm_cb.devcb.secure_connections_only)) { (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS_NO_SECURITY); return (BTM_SUCCESS); } #if (L2CAP_UCD_INCLUDED == TRUE) if ( conn_type & CONNECTION_TYPE_CONNLESS_MASK ) { if (btm_cb.security_mode == BTM_SEC_MODE_SC) { security_required = btm_sec_set_serv_level4_flags (p_serv_rec->ucd_security_flags, is_originator); } else { security_required = p_serv_rec->ucd_security_flags; } rc = BTM_CMD_STARTED; if (is_originator) { if (((security_required & BTM_SEC_OUT_FLAGS) == 0) || ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_AUTHENTICATE) && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))) || ((((security_required & BTM_SEC_OUT_FLAGS) == (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) && (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) || ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_FLAGS) && (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED))) ) { rc = BTM_SUCCESS; } } else { if (((security_required & BTM_SEC_IN_FLAGS) == 0) || ((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHENTICATE) && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))) || ((((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) && (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) || ((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_FLAGS) && (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED))) ) { // Check for 16 digits (or MITM) if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) || (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == BTM_SEC_IN_MIN_16_DIGIT_PIN) && btm_dev_16_digit_authenticated(p_dev_rec))) { rc = BTM_SUCCESS; } } } if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) && (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) { rc = BTM_CMD_STARTED; } if (rc == BTM_SUCCESS) { if (p_callback) { (*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_SUCCESS); } return (BTM_SUCCESS); } } else #endif { if (btm_cb.security_mode == BTM_SEC_MODE_SC) { security_required = btm_sec_set_serv_level4_flags (p_serv_rec->security_flags, is_originator); } else { security_required = p_serv_rec->security_flags; } } BTM_TRACE_DEBUG("%s: security_required 0x%04x, is_originator 0x%02x, psm 0x%04x\n", __FUNCTION__, security_required, is_originator, psm); if ((!is_originator) && (security_required & BTM_SEC_MODE4_LEVEL4)) { BOOLEAN local_supports_sc = controller_get_interface()->supports_secure_connections(); /* acceptor receives L2CAP Channel Connect Request for Secure Connections Only service */ if (!(local_supports_sc) || !(p_dev_rec->remote_supports_secure_connections)) { BTM_TRACE_DEBUG("%s: SC only service, local_support_for_sc %d\n" "rmt_support_for_sc : %d -> fail pairing\n", __FUNCTION__, local_supports_sc, p_dev_rec->remote_supports_secure_connections); if (p_callback) { (*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_MODE4_LEVEL4_NOT_SUPPORTED); } return (BTM_MODE4_LEVEL4_NOT_SUPPORTED); } } /* there are some devices (moto KRZR) which connects to several services at the same time */ /* we will process one after another */ if ( (p_dev_rec->p_callback) || (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) ) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("%s() - busy - PSM:%d delayed state: %s mode:%d, sm4:0x%x\n", __func__, psm, btm_pair_state_descr(btm_cb.pairing_state), btm_cb.security_mode, p_dev_rec->sm4); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE BTM_TRACE_EVENT ("security_flags:x%x, sec_flags:x%x\n", security_required, p_dev_rec->sec_flags); rc = BTM_CMD_STARTED; if ((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED || btm_cb.security_mode == BTM_SEC_MODE_NONE || btm_cb.security_mode == BTM_SEC_MODE_SERVICE || btm_cb.security_mode == BTM_SEC_MODE_LINK) || (BTM_SM4_KNOWN == p_dev_rec->sm4) || (BTM_SEC_IS_SM4(p_dev_rec->sm4) && (btm_sec_is_upgrade_possible(p_dev_rec, is_originator) == FALSE))) { /* legacy mode - local is legacy or local is lisbon/peer is legacy * or SM4 with no possibility of link key upgrade */ if (is_originator) { if (((security_required & BTM_SEC_OUT_FLAGS) == 0) || ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec))) || ((((security_required & BTM_SEC_OUT_FLAGS) == (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) && btm_dev_encrypted(p_dev_rec))) || ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_FLAGS) && btm_dev_authorized(p_dev_rec) && btm_dev_encrypted(p_dev_rec))) ) { rc = BTM_SUCCESS; } } else { if (((security_required & BTM_SEC_IN_FLAGS) == 0) || (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec)) || (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) && btm_dev_encrypted(p_dev_rec)) || (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHORIZE) && (btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec))) || (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_AUTHORIZE)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_authenticated(p_dev_rec))) || (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHORIZE)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_encrypted(p_dev_rec))) || (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_FLAGS) && btm_dev_encrypted(p_dev_rec) && (btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)))) { // Check for 16 digits (or MITM) if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) || (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == BTM_SEC_IN_MIN_16_DIGIT_PIN) && btm_dev_16_digit_authenticated(p_dev_rec))) { rc = BTM_SUCCESS; } } } if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) && (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) { rc = BTM_CMD_STARTED; } if (rc == BTM_SUCCESS) { if (p_callback) { (*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_SUCCESS); } return (BTM_SUCCESS); } } btm_cb.sec_req_pending = TRUE; return (BTM_CMD_STARTED); } /* Save pointer to service record */ p_dev_rec->p_cur_service = p_serv_rec; /* Modify security_required in btm_sec_l2cap_access_req for Lisbon */ if (btm_cb.security_mode == BTM_SEC_MODE_SP || btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG || btm_cb.security_mode == BTM_SEC_MODE_SC) { if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) { if (is_originator) { /* SM4 to SM4 -> always authenticate & encrypt */ security_required |= (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT); } else { /* acceptor */ /* SM4 to SM4: the acceptor needs to make sure the authentication is already done */ chk_acp_auth_done = TRUE; /* SM4 to SM4 -> always authenticate & encrypt */ security_required |= (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT); } } else if (!(BTM_SM4_KNOWN & p_dev_rec->sm4)) { /* the remote features are not known yet */ BTM_TRACE_DEBUG("%s: (%s) remote features unknown!!sec_flags:0x%02x\n", __FUNCTION__, (is_originator) ? "initiator" : "acceptor", p_dev_rec->sec_flags); p_dev_rec->sm4 |= BTM_SM4_REQ_PEND; return (BTM_CMD_STARTED); } } BTM_TRACE_DEBUG ("%s() sm4:0x%x, sec_flags:0x%x, security_required:0x%x chk:%d\n", __func__, p_dev_rec->sm4, p_dev_rec->sec_flags, security_required, chk_acp_auth_done); old_security_required = p_dev_rec->security_required; old_is_originator = p_dev_rec->is_originator; p_dev_rec->security_required = security_required; p_dev_rec->p_ref_data = p_ref_data; p_dev_rec->is_originator = is_originator; #if (L2CAP_UCD_INCLUDED == TRUE) if ( conn_type & CONNECTION_TYPE_CONNLESS_MASK ) { p_dev_rec->is_ucd = TRUE; } else { p_dev_rec->is_ucd = FALSE; } #endif /* If there are multiple service records used through the same PSM */ /* leave security decision for the multiplexor on the top */ #if (L2CAP_UCD_INCLUDED == TRUE) if (((btm_sec_find_next_serv (p_serv_rec)) != NULL) && (!( conn_type & CONNECTION_TYPE_CONNLESS_MASK ))) /* if not UCD */ #else if ((btm_sec_find_next_serv (p_serv_rec)) != NULL) #endif { BTM_TRACE_DEBUG ("no next_serv sm4:0x%x, chk:%d\n", p_dev_rec->sm4, chk_acp_auth_done); if (!BTM_SEC_IS_SM4(p_dev_rec->sm4)) { BTM_TRACE_EVENT ("Security Manager: l2cap_access_req PSM:%d postponed for multiplexer\n", psm); /* pre-Lisbon: restore the old settings */ p_dev_rec->security_required = old_security_required; p_dev_rec->is_originator = old_is_originator; (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS); return (BTM_SUCCESS); } } /* if the originator is using dynamic PSM in legacy mode, do not start any security process now * The layer above L2CAP needs to carry out the security requirement after L2CAP connect * response is received */ if (is_originator && ((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED || btm_cb.security_mode == BTM_SEC_MODE_NONE || btm_cb.security_mode == BTM_SEC_MODE_SERVICE || btm_cb.security_mode == BTM_SEC_MODE_LINK) || !BTM_SEC_IS_SM4(p_dev_rec->sm4)) && (psm >= 0x1001)) { BTM_TRACE_EVENT ("dynamic PSM:0x%x in legacy mode - postponed for upper layer\n", psm); /* restore the old settings */ p_dev_rec->security_required = old_security_required; p_dev_rec->is_originator = old_is_originator; (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS); return (BTM_SUCCESS); } if (chk_acp_auth_done) { BTM_TRACE_DEBUG ("(SM4 to SM4) btm_sec_l2cap_access_req rspd. authenticated: x%x, enc: x%x\n", (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED), (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED)); /* SM4, but we do not know for sure which level of security we need. * as long as we have a link key, it's OK */ if ((0 == (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) || (0 == (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) { rc = BTM_DELAY_CHECK; /* 2046 may report HCI_Encryption_Change and L2C Connection Request out of sequence because of data path issues. Delay this disconnect a little bit */ BTM_TRACE_API("%s peer should have initiated security process by now (SM4 to SM4)\n", __func__); p_dev_rec->p_callback = p_callback; p_dev_rec->sec_state = BTM_SEC_STATE_DELAY_FOR_ENC; (*p_callback) (bd_addr, transport, p_ref_data, rc); return BTM_SUCCESS; } } p_dev_rec->p_callback = p_callback; if (p_dev_rec->last_author_service_id == BTM_SEC_NO_LAST_SERVICE_ID || p_dev_rec->last_author_service_id != p_dev_rec->p_cur_service->service_id) { /* Although authentication and encryption are per connection ** authorization is per access request. For example when serial connection ** is up and authorized and client requests to read file (access to other ** scn), we need to request user's permission again. */ p_dev_rec->sec_flags &= ~BTM_SEC_AUTHORIZED; } if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) { if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) && (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) { /* BTM_LKEY_TYPE_AUTH_COMB_P_256 is the only acceptable key in this case */ if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) != 0) { p_dev_rec->sm4 |= BTM_SM4_UPGRADE; } p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED | BTM_SEC_AUTHENTICATED); BTM_TRACE_DEBUG ("%s: sec_flags:0x%x", __FUNCTION__, p_dev_rec->sec_flags); } else { /* If we already have a link key to the connected peer, is it secure enough? */ btm_sec_check_upgrade(p_dev_rec, is_originator); } } BTM_TRACE_EVENT ("%s() PSM:%d Handle:%d State:%d Flags: 0x%x Required: 0x%x Service ID:%d\n", __func__, psm, handle, p_dev_rec->sec_state, p_dev_rec->sec_flags, p_dev_rec->security_required, p_dev_rec->p_cur_service->service_id); if ((rc = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED) { p_dev_rec->p_callback = NULL; (*p_callback) (bd_addr, transport, p_dev_rec->p_ref_data, (UINT8)rc); } return (rc); #else return BTM_MODE_UNSUPPORTED; #endif ///SMP_INCLUDED == TRUE } /******************************************************************************* ** ** Function btm_sec_mx_access_request ** ** Description This function is called by all Multiplexing Protocols during ** establishing connection to or from peer device to grant ** permission to establish application connection. ** ** Parameters: bd_addr - Address of the peer device ** psm - L2CAP PSM ** is_originator - TRUE if protocol above L2CAP originates ** connection ** mx_proto_id - protocol ID of the multiplexer ** mx_chan_id - multiplexer channel to reach application ** p_callback - Pointer to callback function called if ** this function returns PENDING after required ** procedures are completed ** p_ref_data - Pointer to any reference data needed by the ** the callback function. ** ** Returns BTM_CMD_STARTED ** *******************************************************************************/ tBTM_STATUS btm_sec_mx_access_request (BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_originator, UINT32 mx_proto_id, UINT32 mx_chan_id, tBTM_SEC_CALLBACK *p_callback, void *p_ref_data) { #if (SMP_INCLUDED == TRUE) tBTM_SEC_DEV_REC *p_dev_rec; tBTM_SEC_SERV_REC *p_serv_rec; tBTM_STATUS rc; UINT16 security_required; BOOLEAN transport = FALSE;/* should check PSM range in LE connection oriented L2CAP connection */ BTM_TRACE_DEBUG ("%s() is_originator: %d\n", __func__, is_originator); /* Find or get oldest record */ p_dev_rec = btm_find_or_alloc_dev (bd_addr); /* Find the service record for the PSM */ p_serv_rec = btm_sec_find_mx_serv (is_originator, psm, mx_proto_id, mx_chan_id); /* If there is no application registered with this PSM do not allow connection */ if (!p_serv_rec) { if (p_callback) { (*p_callback) (bd_addr, transport, p_ref_data, BTM_MODE_UNSUPPORTED); } BTM_TRACE_ERROR ("Security Manager: MX service not found PSM:%d Proto:%d SCN:%d\n", psm, mx_proto_id, mx_chan_id); return BTM_NO_RESOURCES; } if ((btm_cb.security_mode == BTM_SEC_MODE_SC) && (!btm_sec_is_serv_level0(psm))) { security_required = btm_sec_set_serv_level4_flags (p_serv_rec->security_flags, is_originator); } else { security_required = p_serv_rec->security_flags; } /* there are some devices (moto phone) which connects to several services at the same time */ /* we will process one after another */ if ( (p_dev_rec->p_callback) || (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) ) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("%s() service PSM:%d Proto:%d SCN:%d delayed state: %s\n", __func__, psm, mx_proto_id, mx_chan_id, btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE rc = BTM_CMD_STARTED; if ((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED || btm_cb.security_mode == BTM_SEC_MODE_NONE || btm_cb.security_mode == BTM_SEC_MODE_SERVICE || btm_cb.security_mode == BTM_SEC_MODE_LINK) || (BTM_SM4_KNOWN == p_dev_rec->sm4) || (BTM_SEC_IS_SM4(p_dev_rec->sm4) && (btm_sec_is_upgrade_possible(p_dev_rec, is_originator) == FALSE))) { /* legacy mode - local is legacy or local is lisbon/peer is legacy * or SM4 with no possibility of link key upgrade */ if (is_originator) { if (((security_required & BTM_SEC_OUT_FLAGS) == 0) || ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec))) || ((((security_required & BTM_SEC_OUT_FLAGS) == (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) && btm_dev_encrypted(p_dev_rec))) ) { rc = BTM_SUCCESS; } } else { if (((security_required & BTM_SEC_IN_FLAGS) == 0) || ((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec))) || (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHORIZE) && (btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec))) || (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_AUTHENTICATE)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_authenticated(p_dev_rec))) || (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_encrypted(p_dev_rec))) || ((((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) && btm_dev_encrypted(p_dev_rec))) ) { // Check for 16 digits (or MITM) if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) || (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == BTM_SEC_IN_MIN_16_DIGIT_PIN) && btm_dev_16_digit_authenticated(p_dev_rec))) { rc = BTM_SUCCESS; } } } if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) && (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) { rc = BTM_CMD_STARTED; } } if (rc == BTM_SUCCESS) { BTM_TRACE_EVENT("%s: allow to bypass, checking authorization\n", __FUNCTION__); /* the security in BTM_SEC_IN_FLAGS is fullfilled so far, check the requirements in */ /* btm_sec_execute_procedure */ if ((is_originator && (p_serv_rec->security_flags & BTM_SEC_OUT_AUTHORIZE)) || (!is_originator && (p_serv_rec->security_flags & BTM_SEC_IN_AUTHORIZE))) { BTM_TRACE_EVENT("%s: still need authorization\n", __FUNCTION__); rc = BTM_CMD_STARTED; } } /* Check whether there is a pending security procedure, if so we should always queue */ /* the new security request */ if (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE) { BTM_TRACE_EVENT("%s: There is a pending security procedure\n", __FUNCTION__); rc = BTM_CMD_STARTED; } if (rc == BTM_CMD_STARTED) { BTM_TRACE_EVENT("%s: call btm_sec_queue_mx_request\n", __FUNCTION__); btm_sec_queue_mx_request (bd_addr, psm, is_originator, mx_proto_id, mx_chan_id, p_callback, p_ref_data); } else { /* rc == BTM_SUCCESS */ /* access granted */ if (p_callback) { (*p_callback) (bd_addr, transport, p_ref_data, (UINT8)rc); } } #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT("%s: return with rc = 0x%02x in delayed state %s\n", __FUNCTION__, rc, btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE return rc; } if ((!is_originator) && ((security_required & BTM_SEC_MODE4_LEVEL4) || (btm_cb.security_mode == BTM_SEC_MODE_SC))) { BOOLEAN local_supports_sc = controller_get_interface()->supports_secure_connections(); /* acceptor receives service connection establishment Request for */ /* Secure Connections Only service */ if (!(local_supports_sc) || !(p_dev_rec->remote_supports_secure_connections)) { BTM_TRACE_DEBUG("%s: SC only service,local_support_for_sc %d,\n" "remote_support_for_sc %d: fail pairing\n", __FUNCTION__, local_supports_sc, p_dev_rec->remote_supports_secure_connections); if (p_callback) { (*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_MODE4_LEVEL4_NOT_SUPPORTED); } return (BTM_MODE4_LEVEL4_NOT_SUPPORTED); } } p_dev_rec->p_cur_service = p_serv_rec; p_dev_rec->security_required = security_required; if (btm_cb.security_mode == BTM_SEC_MODE_SP || btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG || btm_cb.security_mode == BTM_SEC_MODE_SC) { if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) { if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) && (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) { /* BTM_LKEY_TYPE_AUTH_COMB_P_256 is the only acceptable key in this case */ if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) != 0) { p_dev_rec->sm4 |= BTM_SM4_UPGRADE; } p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED | BTM_SEC_AUTHENTICATED); BTM_TRACE_DEBUG("%s: sec_flags:0x%x\n", __FUNCTION__, p_dev_rec->sec_flags); } else { /* If we already have a link key, check if that link key is good enough */ btm_sec_check_upgrade(p_dev_rec, is_originator); } } } p_dev_rec->is_originator = is_originator; p_dev_rec->p_callback = p_callback; p_dev_rec->p_ref_data = p_ref_data; /* Although authentication and encryption are per connection */ /* authorization is per access request. For example when serial connection */ /* is up and authorized and client requests to read file (access to other */ /* scn, we need to request user's permission again. */ p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED); BTM_TRACE_EVENT ("%s() proto_id:%d chan_id:%d State:%d Flags:0x%x Required:0x%x Service ID:%d\n", __func__, mx_proto_id, mx_chan_id, p_dev_rec->sec_state, p_dev_rec->sec_flags, p_dev_rec->security_required, p_dev_rec->p_cur_service->service_id); if ((rc = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED) { if (p_callback) { p_dev_rec->p_callback = NULL; (*p_callback) (bd_addr, transport, p_ref_data, (UINT8)rc); } } return rc; #else return BTM_MODE_UNSUPPORTED; #endif ///SMP_INCLUDED == TRUE } /******************************************************************************* ** ** Function btm_sec_conn_req ** ** Description This function is when the peer device is requesting ** connection ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_conn_req (UINT8 *bda, UINT8 *dc) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda); /* Some device may request a connection before we are done with the HCI_Reset sequence */ if (!controller_get_interface()->get_is_ready()) { BTM_TRACE_ERROR ("Security Manager: connect request when device not ready\n"); btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE); return; } /* Security guys wants us not to allow connection from not paired devices */ /* Check if connection is allowed for only paired devices */ if (btm_cb.connect_only_paired) { if (!p_dev_rec || !(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)) { BTM_TRACE_ERROR ("Security Manager: connect request from non-paired device\n"); btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE); return; } } #if BTM_ALLOW_CONN_IF_NONDISCOVER == FALSE /* If non-discoverable, only allow known devices to connect */ if (btm_cb.btm_inq_vars.discoverable_mode == BTM_NON_DISCOVERABLE) { if (!p_dev_rec) { BTM_TRACE_ERROR ("Security Manager: connect request from not paired device\n"); btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE); return; } } #endif if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) && (!memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN))) { BTM_TRACE_ERROR ("Security Manager: reject connect request from bonding device\n"); /* incoming connection from bonding device is rejected */ btm_cb.pairing_flags |= BTM_PAIR_FLAGS_REJECTED_CONNECT; btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE); return; } /* Host is not interested or approved connection. Save BDA and DC and */ /* pass request to L2CAP */ memcpy (btm_cb.connecting_bda, bda, BD_ADDR_LEN); memcpy (btm_cb.connecting_dc, dc, DEV_CLASS_LEN); if (l2c_link_hci_conn_req (bda)) { if (!p_dev_rec) { /* accept the connection -> allocate a device record */ p_dev_rec = btm_sec_alloc_dev (bda); } if (p_dev_rec) { p_dev_rec->sm4 |= BTM_SM4_CONN_PEND; } } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_bond_cancel_complete ** ** Description This function is called to report bond cancel complete ** event. ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_sec_bond_cancel_complete (void) { tBTM_SEC_DEV_REC *p_dev_rec; if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) || (BTM_PAIR_STATE_WAIT_LOCAL_PIN == btm_cb.pairing_state && BTM_PAIR_FLAGS_WE_STARTED_DD & btm_cb.pairing_flags) || (btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME && BTM_PAIR_FLAGS_WE_CANCEL_DD & btm_cb.pairing_flags)) { /* for dedicated bonding in legacy mode, authentication happens at "link level" * btm_sec_connected is called with failed status. * In theory, the code that handles is_pairing_device/TRUE should clean out security related code. * However, this function may clean out the security related flags and btm_sec_connected would not know * this function also needs to do proper clean up. */ if ((p_dev_rec = btm_find_dev (btm_cb.pairing_bda)) != NULL) { p_dev_rec->security_required = BTM_SEC_NONE; } btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); /* Notify application that the cancel succeeded */ if (btm_cb.api.p_bond_cancel_cmpl_callback) { btm_cb.api.p_bond_cancel_cmpl_callback(BTM_SUCCESS); } } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_create_conn_cancel_complete ** ** Description This function is called when the command complete message ** is received from the HCI for the create connection cancel ** command. ** ** Returns void ** *******************************************************************************/ void btm_create_conn_cancel_complete (UINT8 *p) { UINT8 status; STREAM_TO_UINT8 (status, p); //BTM_TRACE_EVENT ("btm_create_conn_cancel_complete(): in State: %s status:%d\n", // btm_pair_state_descr(btm_cb.pairing_state), status); /* if the create conn cancel cmd was issued by the bond cancel, ** the application needs to be notified that bond cancel succeeded */ switch (status) { case HCI_SUCCESS: #if (SMP_INCLUDED == TRUE) btm_sec_bond_cancel_complete(); #endif ///SMP_INCLUDED == TRUE break; case HCI_ERR_CONNECTION_EXISTS: case HCI_ERR_NO_CONNECTION: default: /* Notify application of the error */ if (btm_cb.api.p_bond_cancel_cmpl_callback) { btm_cb.api.p_bond_cancel_cmpl_callback(BTM_ERR_PROCESSING); } break; } } /******************************************************************************* ** ** Function btm_sec_check_pending_reqs ** ** Description This function is called at the end of the security procedure ** to let L2CAP and RFCOMM know to re-submit any pending requests ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_check_pending_reqs (void) { tBTM_SEC_QUEUE_ENTRY *p_e; fixed_queue_t *bq; if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) { /* First, resubmit L2CAP requests */ if (btm_cb.sec_req_pending) { btm_cb.sec_req_pending = FALSE; #if (CLASSIC_BT_INCLUDED == TRUE) l2cu_resubmit_pending_sec_req (NULL); #endif ///SMP_INCLUDED == TRUE } /* Now, re-submit anything in the mux queue */ bq = btm_cb.sec_pending_q; btm_cb.sec_pending_q = fixed_queue_new(QUEUE_SIZE_MAX); while ((p_e = (tBTM_SEC_QUEUE_ENTRY *)fixed_queue_try_dequeue(bq)) != NULL) { /* Check that the ACL is still up before starting security procedures */ if (btm_bda_to_acl(p_e->bd_addr, p_e->transport) != NULL) { if (p_e->psm != 0) { BTM_TRACE_EVENT("%s PSM:0x%04x Is_Orig:%u mx_proto_id:%u mx_chan_id:%u\n", __FUNCTION__, p_e->psm, p_e->is_orig, p_e->mx_proto_id, p_e->mx_chan_id); btm_sec_mx_access_request (p_e->bd_addr, p_e->psm, p_e->is_orig, p_e->mx_proto_id, p_e->mx_chan_id, p_e->p_callback, p_e->p_ref_data); } else { BTM_SetEncryption(p_e->bd_addr, p_e->transport, p_e->p_callback, p_e->p_ref_data); } } osi_free (p_e); } fixed_queue_free(bq, NULL); } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_init ** ** Description This function is on the SEC startup ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_init (UINT8 sec_mode) { btm_cb.security_mode = sec_mode; memset (btm_cb.pairing_bda, 0xff, BD_ADDR_LEN); btm_cb.max_collision_delay = BTM_SEC_MAX_COLLISION_DELAY; } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_device_down ** ** Description This function should be called when device is disabled or ** turned off ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_device_down (void) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("%s() State: %s\n", __func__, btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_dev_reset ** ** Description This function should be called after device reset ** ** Returns void ** *******************************************************************************/ void btm_sec_dev_reset (void) { if (controller_get_interface()->supports_simple_pairing()) { /* set the default IO capabilities */ btm_cb.devcb.loc_io_caps = BTM_LOCAL_IO_CAPS; /* add mx service to use no security */ BTM_SetSecurityLevel(FALSE, "RFC_MUX\n", BTM_SEC_SERVICE_RFC_MUX, BTM_SEC_NONE, BT_PSM_RFCOMM, BTM_SEC_PROTO_RFCOMM, 0); } else { btm_cb.security_mode = BTM_SEC_MODE_SERVICE; } BTM_TRACE_DEBUG ("btm_sec_dev_reset sec mode: %d\n", btm_cb.security_mode); } /******************************************************************************* ** ** Function btm_sec_abort_access_req ** ** Description This function is called by the L2CAP or RFCOMM to abort ** the pending operation. ** ** Parameters: bd_addr - Address of the peer device ** ** Returns void ** *******************************************************************************/ void btm_sec_abort_access_req (BD_ADDR bd_addr) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); if (!p_dev_rec) { return; } if ((p_dev_rec->sec_state != BTM_SEC_STATE_AUTHORIZING) && (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING)) { return; } p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; p_dev_rec->p_callback = NULL; } /******************************************************************************* ** ** Function btm_sec_dd_create_conn ** ** Description This function is called to create the ACL connection for ** the dedicated boding process ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static tBTM_STATUS btm_sec_dd_create_conn (tBTM_SEC_DEV_REC *p_dev_rec) { tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR); if (p_lcb && (p_lcb->link_state == LST_CONNECTED || p_lcb->link_state == LST_CONNECTING)) { BTM_TRACE_WARNING("%s Connection already exists\n", __func__); return BTM_CMD_STARTED; } /* Make sure an L2cap link control block is available */ if (!p_lcb && (p_lcb = l2cu_allocate_lcb (p_dev_rec->bd_addr, TRUE, BT_TRANSPORT_BR_EDR)) == NULL) { BTM_TRACE_WARNING ("Security Manager: failed allocate LCB [%02x%02x%02x%02x%02x%02x]\n", p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2], p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]); return (BTM_NO_RESOURCES); } /* set up the control block to indicated dedicated bonding */ btm_cb.pairing_flags |= BTM_PAIR_FLAGS_DISC_WHEN_DONE; if (l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR) == FALSE) { BTM_TRACE_WARNING ("Security Manager: failed create [%02x%02x%02x%02x%02x%02x]\n", p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2], p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]); l2cu_release_lcb(p_lcb); return (BTM_NO_RESOURCES); } btm_acl_update_busy_level (BTM_BLI_PAGE_EVT); BTM_TRACE_DEBUG ("Security Manager: btm_sec_dd_create_conn [%02x%02x%02x%02x%02x%02x]\n", p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2], p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]); btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ); return (BTM_CMD_STARTED); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_rmt_name_request_complete ** ** Description This function is called when remote name was obtained from ** the peer device ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_rmt_name_request_complete (UINT8 *p_bd_addr, UINT8 *p_bd_name, UINT8 status) { tBTM_SEC_DEV_REC *p_dev_rec; int i; DEV_CLASS dev_class; UINT8 old_sec_state; BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete\n"); if (((p_bd_addr == NULL) && !BTM_ACL_IS_CONNECTED(btm_cb.connecting_bda)) || ((p_bd_addr != NULL) && !BTM_ACL_IS_CONNECTED(p_bd_addr))) { btm_acl_resubmit_page(); } /* If remote name request failed, p_bd_addr is null and we need to search */ /* based on state assuming that we are doing 1 at a time */ if (p_bd_addr) { p_dev_rec = btm_find_dev (p_bd_addr); } else { p_dev_rec = &btm_cb.sec_dev_rec[0]; for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) { if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE) && (p_dev_rec->sec_state == BTM_SEC_STATE_GETTING_NAME)) { p_bd_addr = p_dev_rec->bd_addr; break; } } if (i == BTM_SEC_MAX_DEVICE_RECORDS) { p_dev_rec = NULL; } } /* Commenting out trace due to obf/compilation problems. */ #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) if (!p_bd_name) { p_bd_name = (UINT8 *)""; } if (p_dev_rec) { BTM_TRACE_EVENT ("Security Manager: rmt_name_complete PairState: %s RemName: %s status: %d State:%d p_dev_rec: %p \n", btm_pair_state_descr (btm_cb.pairing_state), p_bd_name, status, p_dev_rec->sec_state, p_dev_rec); } else { BTM_TRACE_EVENT ("Security Manager: rmt_name_complete PairState: %s RemName: %s status: %d\n", btm_pair_state_descr (btm_cb.pairing_state), p_bd_name, status); } #endif if (p_dev_rec) { old_sec_state = p_dev_rec->sec_state; if (status == HCI_SUCCESS) { BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, sizeof (p_dev_rec->sec_bd_name), (char *)p_bd_name, BTM_MAX_REM_BD_NAME_LEN); p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN; BTM_TRACE_EVENT ("setting BTM_SEC_NAME_KNOWN sec_flags:0x%x\n", p_dev_rec->sec_flags); } else { /* Notify all clients waiting for name to be resolved even if it failed so clients can continue */ p_dev_rec->sec_bd_name[0] = 0; } if (p_dev_rec->sec_state == BTM_SEC_STATE_GETTING_NAME) { p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; } /* Notify all clients waiting for name to be resolved */ for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) { if (btm_cb.p_rmt_name_callback[i] && p_bd_addr) { (*btm_cb.p_rmt_name_callback[i])(p_bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name); } } } else { dev_class[0] = 0; dev_class[1] = 0; dev_class[2] = 0; /* Notify all clients waiting for name to be resolved even if not found so clients can continue */ for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) { if (btm_cb.p_rmt_name_callback[i] && p_bd_addr) { (*btm_cb.p_rmt_name_callback[i])(p_bd_addr, dev_class, (UINT8 *)""); } } return; } /* If we were delaying asking UI for a PIN because name was not resolved, ask now */ if ( (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_LOCAL_PIN) && p_bd_addr && (memcmp (btm_cb.pairing_bda, p_bd_addr, BD_ADDR_LEN) == 0) ) { BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete() delayed pin now being requested flags:0x%x, (p_pin_callback=%p)\n", btm_cb.pairing_flags, btm_cb.api.p_pin_callback); if (((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) == 0) && ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PIN_REQD) == 0) && btm_cb.api.p_pin_callback) { BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete() calling pin_callback\n"); btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD; (*btm_cb.api.p_pin_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_bd_name, (p_dev_rec->p_cur_service == NULL) ? FALSE : (p_dev_rec->p_cur_service->security_flags & BTM_SEC_IN_MIN_16_DIGIT_PIN)); } /* Set the same state again to force the timer to be restarted */ btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN); return; } /* Check if we were delaying bonding because name was not resolved */ if ( btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME) { if (p_bd_addr && memcmp (btm_cb.pairing_bda, p_bd_addr, BD_ADDR_LEN) == 0) { BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete() continue bonding sm4: 0x%04x, status:0x%x\n", p_dev_rec->sm4, status); if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_CANCEL_DD) { btm_sec_bond_cancel_complete(); return; } if (status != HCI_SUCCESS) { btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); if (btm_cb.api.p_auth_complete_callback) (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, status); return; } /* if peer is very old legacy devices, HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT is not reported */ if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) { /* set the KNOWN flag only if BTM_PAIR_FLAGS_REJECTED_CONNECT is not set.*/ /* If it is set, there may be a race condition */ BTM_TRACE_DEBUG ("btm_sec_rmt_name_request_complete IS_SM4_UNKNOWN Flags:0x%04x\n", btm_cb.pairing_flags); if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) == 0) { p_dev_rec->sm4 |= BTM_SM4_KNOWN; } } BTM_TRACE_DEBUG("%s, SM4 Value: %x, Legacy:%d,IS SM4:%d, Unknown:%d\n", __FUNCTION__, p_dev_rec->sm4, BTM_SEC_IS_SM4_LEGACY(p_dev_rec->sm4), BTM_SEC_IS_SM4(p_dev_rec->sm4), BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)); /* BT 2.1 or carkit, bring up the connection to force the peer to request PIN. ** Else prefetch (btm_sec_check_prefetch_pin will do the prefetching if needed) */ if ((p_dev_rec->sm4 != BTM_SM4_KNOWN) || !btm_sec_check_prefetch_pin(p_dev_rec)) { /* if we rejected incoming connection request, we have to wait HCI_Connection_Complete event */ /* before originating */ if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) { BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete: waiting HCI_Connection_Complete after rejecting connection\n"); } /* Both we and the peer are 2.1 - continue to create connection */ else if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) { BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete: failed to start connection\n"); btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_ERR_MEMORY_FULL); } } } return; } else { BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete: wrong BDA, retry with pairing BDA\n"); BTM_ReadRemoteDeviceName (btm_cb.pairing_bda, NULL, BT_TRANSPORT_BR_EDR); return; } } /* check if we were delaying link_key_callback because name was not resolved */ if (p_dev_rec->link_key_not_sent) { /* If HCI connection complete has not arrived, wait for it */ if (p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE) { return; } p_dev_rec->link_key_not_sent = FALSE; btm_send_link_key_notif(p_dev_rec); /* If its not us who perform authentication, we should tell stackserver */ /* that some authentication has been completed */ /* This is required when different entities receive link notification and auth complete */ if (!(p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE)) { if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_SUCCESS); } } } /* If this is a bonding procedure can disconnect the link now */ if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) { BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete (none/ce)\n"); p_dev_rec->security_required &= ~(BTM_SEC_OUT_AUTHENTICATE); l2cu_start_post_bond_timer(p_dev_rec->hci_handle); return; } if (old_sec_state != BTM_SEC_STATE_GETTING_NAME) { return; } /* If get name failed, notify the waiting layer */ if (status != HCI_SUCCESS) { btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE); return; } if (p_dev_rec->sm4 & BTM_SM4_REQ_PEND) { BTM_TRACE_EVENT ("waiting for remote features!!\n"); return; } /* Remote Name succeeded, execute the next security procedure, if any */ status = (UINT8)btm_sec_execute_procedure (p_dev_rec); /* If result is pending reply from the user or from the device is pending */ if (status == BTM_CMD_STARTED) { return; } /* There is no next procedure or start of procedure failed, notify the waiting layer */ btm_sec_dev_rec_cback_event (p_dev_rec, status, FALSE); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_rmt_host_support_feat_evt ** ** Description This function is called when the ** HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT is received ** ** Returns void ** *******************************************************************************/ void btm_sec_rmt_host_support_feat_evt (UINT8 *p) { tBTM_SEC_DEV_REC *p_dev_rec; BD_ADDR bd_addr; /* peer address */ BD_FEATURES features; STREAM_TO_BDADDR (bd_addr, p); p_dev_rec = btm_find_or_alloc_dev (bd_addr); BTM_TRACE_EVENT ("btm_sec_rmt_host_support_feat_evt sm4: 0x%x p[0]: 0x%x\n", p_dev_rec->sm4, p[0]); if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) { p_dev_rec->sm4 = BTM_SM4_KNOWN; STREAM_TO_ARRAY(features, p, HCI_FEATURE_BYTES_PER_PAGE); if (HCI_SSP_HOST_SUPPORTED(features)) { p_dev_rec->sm4 = BTM_SM4_TRUE; } BTM_TRACE_EVENT ("btm_sec_rmt_host_support_feat_evt sm4: 0x%x features[0]: 0x%x\n", p_dev_rec->sm4, features[0]); } } /******************************************************************************* ** ** Function btm_io_capabilities_req ** ** Description This function is called when LM request for the IO ** capability of the local device and ** if the OOB data is present for the device in the event ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_io_capabilities_req (UINT8 *p) { tBTM_SP_IO_REQ evt_data; UINT8 err_code = 0; tBTM_SEC_DEV_REC *p_dev_rec; BOOLEAN is_orig = TRUE; UINT8 callback_rc = BTM_SUCCESS; STREAM_TO_BDADDR (evt_data.bd_addr, p); /* setup the default response according to compile options */ /* assume that the local IO capability does not change * loc_io_caps is initialized with the default value */ evt_data.io_cap = btm_cb.devcb.loc_io_caps; evt_data.oob_data = BTM_OOB_NONE; evt_data.auth_req = BTM_DEFAULT_AUTH_REQ; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT("%s: State: %s\n", __FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE p_dev_rec = btm_find_or_alloc_dev (evt_data.bd_addr); BTM_TRACE_DEBUG("%s:Security mode: %d, Num Read Remote Feat pages: %d\n", __FUNCTION__, btm_cb.security_mode, p_dev_rec->num_read_pages); if ((btm_cb.security_mode == BTM_SEC_MODE_SC) && (p_dev_rec->num_read_pages == 0)) { BTM_TRACE_EVENT("%s: Device security mode is SC only.\n" "To continue need to know remote features.\n", __FUNCTION__); p_dev_rec->remote_features_needed = TRUE; return; } p_dev_rec->sm4 |= BTM_SM4_TRUE; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT("%s: State: %s Flags: 0x%04x p_cur_service: %p\n", __FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state), btm_cb.pairing_flags, p_dev_rec->p_cur_service); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE if (p_dev_rec->p_cur_service) { BTM_TRACE_EVENT("%s: cur_service psm: 0x%04x, security_flags: 0x%04x\n", __FUNCTION__, p_dev_rec->p_cur_service->psm, p_dev_rec->p_cur_service->security_flags); } switch (btm_cb.pairing_state) { /* initiator connecting */ case BTM_PAIR_STATE_IDLE: //TODO: Handle Idle pairing state //security_required = p_dev_rec->security_required; break; /* received IO capability response already->acceptor */ case BTM_PAIR_STATE_INCOMING_SSP: is_orig = FALSE; if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_PEER_STARTED_DD) { /* acceptor in dedicated bonding */ evt_data.auth_req = BTM_DEFAULT_DD_AUTH_REQ; } break; /* initiator, at this point it is expected to be dedicated bonding initiated by local device */ case BTM_PAIR_STATE_WAIT_PIN_REQ: if (!memcmp (evt_data.bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN)) { evt_data.auth_req = BTM_DEFAULT_DD_AUTH_REQ; } else { err_code = HCI_ERR_HOST_BUSY_PAIRING; } break; /* any other state is unexpected */ default: err_code = HCI_ERR_HOST_BUSY_PAIRING; BTM_TRACE_ERROR("%s: Unexpected Pairing state received %d\n", __FUNCTION__, btm_cb.pairing_state); break; } if (btm_cb.pairing_disabled) { /* pairing is not allowed */ BTM_TRACE_DEBUG("%s: Pairing is not allowed -> fail pairing.\n", __FUNCTION__); err_code = HCI_ERR_PAIRING_NOT_ALLOWED; } else if (btm_cb.security_mode == BTM_SEC_MODE_SC) { BOOLEAN local_supports_sc = controller_get_interface()->supports_secure_connections(); /* device in Secure Connections Only mode */ if (!(local_supports_sc) || !(p_dev_rec->remote_supports_secure_connections)) { BTM_TRACE_DEBUG("%s: SC only service, local_support_for_sc %d,\n" " remote_support_for_sc 0x%02x -> fail pairing\n", __FUNCTION__, local_supports_sc, p_dev_rec->remote_supports_secure_connections); err_code = HCI_ERR_PAIRING_NOT_ALLOWED; } } if (err_code != 0) { /* coverity[uninit_use_in_call] Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp" False-positive: evt_data.bd_addr is set at the beginning with: STREAM_TO_BDADDR (evt_data.bd_addr, p); */ btsnd_hcic_io_cap_req_neg_reply(evt_data.bd_addr, err_code); return; } evt_data.is_orig = is_orig; if (is_orig) { /* local device initiated the pairing non-bonding -> use p_cur_service */ if (!(btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) && p_dev_rec->p_cur_service && (p_dev_rec->p_cur_service->security_flags & BTM_SEC_OUT_AUTHENTICATE)) { if (btm_cb.security_mode == BTM_SEC_MODE_SC) { /* SC only mode device requires MITM protection */ evt_data.auth_req = BTM_AUTH_SP_YES; } else { evt_data.auth_req = (p_dev_rec->p_cur_service->security_flags & BTM_SEC_OUT_MITM) ? BTM_AUTH_SP_YES : BTM_AUTH_SP_NO; } } } /* Notify L2CAP to increase timeout */ l2c_pin_code_request (evt_data.bd_addr); memcpy (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN); /* coverity[uninit_use_in_call] Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp" False-positive: False-positive: evt_data.bd_addr is set at the beginning with: STREAM_TO_BDADDR (evt_data.bd_addr, p); */ if (!memcmp (evt_data.bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN)) { memcpy (p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN); } btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS); callback_rc = BTM_SUCCESS; if (p_dev_rec->sm4 & BTM_SM4_UPGRADE) { p_dev_rec->sm4 &= ~BTM_SM4_UPGRADE; /* link key upgrade: always use SPGB_YES - assuming we want to save the link key */ evt_data.auth_req = BTM_AUTH_SPGB_YES; } else if (btm_cb.api.p_sp_callback) { /* the callback function implementation may change the IO capability... */ callback_rc = (*btm_cb.api.p_sp_callback) (BTM_SP_IO_REQ_EVT, (tBTM_SP_EVT_DATA *)&evt_data); } #if BTM_OOB_INCLUDED == TRUE if ((callback_rc == BTM_SUCCESS) || (BTM_OOB_UNKNOWN != evt_data.oob_data)) #else if (callback_rc == BTM_SUCCESS) #endif { if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)) { evt_data.auth_req = (BTM_AUTH_DD_BOND | (evt_data.auth_req & BTM_AUTH_YN_BIT)); } if (btm_cb.security_mode == BTM_SEC_MODE_SC) { /* At this moment we know that both sides are SC capable, device in */ /* SC only mode requires MITM for any service so let's set MITM bit */ evt_data.auth_req |= BTM_AUTH_YN_BIT; BTM_TRACE_DEBUG("%s: for device in \"SC only\" mode set auth_req to 0x%02x\n", __FUNCTION__, evt_data.auth_req); } /* if the user does not indicate "reply later" by setting the oob_data to unknown */ /* send the response right now. Save the current IO capability in the control block */ btm_cb.devcb.loc_auth_req = evt_data.auth_req; btm_cb.devcb.loc_io_caps = evt_data.io_cap; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT("%s: State: %s IO_CAP:%d oob_data:%d auth_req:%d", __FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state), evt_data.io_cap, evt_data.oob_data, evt_data.auth_req); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE btsnd_hcic_io_cap_req_reply(evt_data.bd_addr, evt_data.io_cap, evt_data.oob_data, evt_data.auth_req); } } /******************************************************************************* ** ** Function btm_io_capabilities_rsp ** ** Description This function is called when the IO capability of the ** specified device is received ** ** Returns void ** *******************************************************************************/ void btm_io_capabilities_rsp (UINT8 *p) { tBTM_SEC_DEV_REC *p_dev_rec; tBTM_SP_IO_RSP evt_data; STREAM_TO_BDADDR (evt_data.bd_addr, p); STREAM_TO_UINT8 (evt_data.io_cap, p); STREAM_TO_UINT8 (evt_data.oob_data, p); STREAM_TO_UINT8 (evt_data.auth_req, p); /* Allocate a new device record or reuse the oldest one */ p_dev_rec = btm_find_or_alloc_dev (evt_data.bd_addr); /* If no security is in progress, this indicates incoming security */ if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) { memcpy (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN); btm_sec_change_pairing_state (BTM_PAIR_STATE_INCOMING_SSP); /* Make sure we reset the trusted mask to help against attacks */ BTM_SEC_CLR_TRUSTED_DEVICE(p_dev_rec->trusted_mask); /* work around for FW bug */ btm_inq_stop_on_ssp(); } /* Notify L2CAP to increase timeout */ l2c_pin_code_request (evt_data.bd_addr); /* We must have a device record here. * Use the connecting device's CoD for the connection */ /* coverity[uninit_use_in_call] Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp" FALSE-POSITIVE error from Coverity test-tool. evt_data.bd_addr is set at the beginning with: STREAM_TO_BDADDR (evt_data.bd_addr, p); */ if (!memcmp (evt_data.bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN)) { memcpy (p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN); } /* peer sets dedicated bonding bit and we did not initiate dedicated bonding */ if (btm_cb.pairing_state == BTM_PAIR_STATE_INCOMING_SSP /* peer initiated bonding */ && (evt_data.auth_req & BTM_AUTH_DD_BOND) ) { /* and dedicated bonding bit is set */ btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PEER_STARTED_DD; } /* save the IO capability in the device record */ p_dev_rec->rmt_io_caps = evt_data.io_cap; p_dev_rec->rmt_auth_req = evt_data.auth_req; if (btm_cb.api.p_sp_callback) { (*btm_cb.api.p_sp_callback) (BTM_SP_IO_RSP_EVT, (tBTM_SP_EVT_DATA *)&evt_data); } } /******************************************************************************* ** ** Function btm_proc_sp_req_evt ** ** Description This function is called to process/report ** HCI_USER_CONFIRMATION_REQUEST_EVT ** or HCI_USER_PASSKEY_REQUEST_EVT ** or HCI_USER_PASSKEY_NOTIFY_EVT ** ** Returns void ** *******************************************************************************/ void btm_proc_sp_req_evt (tBTM_SP_EVT event, UINT8 *p) { tBTM_STATUS status = BTM_ERR_PROCESSING; tBTM_SP_EVT_DATA evt_data; UINT8 *p_bda = evt_data.cfm_req.bd_addr; tBTM_SEC_DEV_REC *p_dev_rec; /* All events start with bd_addr */ STREAM_TO_BDADDR (p_bda, p); #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("btm_proc_sp_req_evt() BDA: %08x%04x event: 0x%x, State: %s\n", (p_bda[0] << 24) + (p_bda[1] << 16) + (p_bda[2] << 8) + p_bda[3], (p_bda[4] << 8) + p_bda[5], event, btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE if ( ((p_dev_rec = btm_find_dev (p_bda)) != NULL) && (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN) == 0) ) { memcpy (evt_data.cfm_req.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN); memcpy (evt_data.cfm_req.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN); BCM_STRNCPY_S ((char *)evt_data.cfm_req.bd_name, sizeof(evt_data.cfm_req.bd_name), (char *)p_dev_rec->sec_bd_name, BTM_MAX_REM_BD_NAME_LEN); switch (event) { case BTM_SP_CFM_REQ_EVT: /* Numeric confirmation. Need user to conf the passkey */ btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM); /* The device record must be allocated in the "IO cap exchange" step */ STREAM_TO_UINT32 (evt_data.cfm_req.num_val, p); evt_data.cfm_req.just_works = TRUE; /* process user confirm req in association with the auth_req param */ // #if (BTM_LOCAL_IO_CAPS == BTM_IO_CAP_IO) if ( (p_dev_rec->rmt_io_caps == BTM_IO_CAP_IO) && (btm_cb.devcb.loc_io_caps == BTM_IO_CAP_IO) && ((p_dev_rec->rmt_auth_req & BTM_AUTH_SP_YES) || (btm_cb.devcb.loc_auth_req & BTM_AUTH_SP_YES)) ) { /* Both devices are DisplayYesNo and one or both devices want to authenticate -> use authenticated link key */ evt_data.cfm_req.just_works = FALSE; } // #endif BTM_TRACE_DEBUG ("btm_proc_sp_req_evt() just_works:%d, io loc:%d, rmt:%d, auth loc:%d, rmt:%d\n", evt_data.cfm_req.just_works, btm_cb.devcb.loc_io_caps, p_dev_rec->rmt_io_caps, btm_cb.devcb.loc_auth_req, p_dev_rec->rmt_auth_req); evt_data.cfm_req.loc_auth_req = btm_cb.devcb.loc_auth_req; evt_data.cfm_req.rmt_auth_req = p_dev_rec->rmt_auth_req; evt_data.cfm_req.loc_io_caps = btm_cb.devcb.loc_io_caps; evt_data.cfm_req.rmt_io_caps = p_dev_rec->rmt_io_caps; break; case BTM_SP_KEY_NOTIF_EVT: /* Passkey notification (other side is a keyboard) */ STREAM_TO_UINT32 (evt_data.key_notif.passkey, p); BTM_TRACE_DEBUG ("BTM_SP_KEY_NOTIF_EVT: passkey: %u\n", evt_data.key_notif.passkey); btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); break; #if (BT_SSP_INCLUDED == TRUE) case BTM_SP_KEY_REQ_EVT: /* HCI_USER_PASSKEY_REQUEST_EVT */ btm_sec_change_pairing_state (BTM_PAIR_STATE_KEY_ENTRY); break; #endif } if (btm_cb.api.p_sp_callback) { status = (*btm_cb.api.p_sp_callback) (event, (tBTM_SP_EVT_DATA *)&evt_data); if (status != BTM_NOT_AUTHORIZED) { return; } /* else BTM_NOT_AUTHORIZED means when the app wants to reject the req right now */ } else if ( (event == BTM_SP_CFM_REQ_EVT) && (evt_data.cfm_req.just_works == TRUE) ) { /* automatically reply with just works if no sp_cback */ status = BTM_SUCCESS; } if (event == BTM_SP_CFM_REQ_EVT) { BTM_TRACE_DEBUG ("calling BTM_ConfirmReqReply with status: %d\n", status); BTM_ConfirmReqReply (status, p_bda); } #if (BT_SSP_INCLUDED == TRUE) else if (event == BTM_SP_KEY_REQ_EVT) { BTM_PasskeyReqReply(status, p_bda, 0); } #endif return; } /* Something bad. we can only fail this connection */ btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY; if (BTM_SP_CFM_REQ_EVT == event) { btsnd_hcic_user_conf_reply (p_bda, FALSE); } else if (BTM_SP_KEY_NOTIF_EVT == event) { /* do nothing -> it very unlikely to happen. This event is most likely to be received by a HID host when it first connects to a HID device. Usually the Host initiated the connection in this case. On Mobile platforms, if there's a security process happening, the host probably can not initiate another connection. BTW (PC) is another story. */ if (NULL != (p_dev_rec = btm_find_dev (p_bda)) ) { btm_sec_disconnect (p_dev_rec->hci_handle, HCI_ERR_AUTH_FAILURE); } } #if (BT_SSP_INCLUDED == TRUE) else { btsnd_hcic_user_passkey_neg_reply(p_bda); } #endif } /******************************************************************************* ** ** Function btm_keypress_notif_evt ** ** Description This function is called when a key press notification is ** received ** ** Returns void ** *******************************************************************************/ void btm_keypress_notif_evt (UINT8 *p) { tBTM_SP_KEYPRESS evt_data; UINT8 *p_bda; /* parse & report BTM_SP_KEYPRESS_EVT */ if (btm_cb.api.p_sp_callback) { p_bda = evt_data.bd_addr; STREAM_TO_BDADDR (p_bda, p); evt_data.notif_type = *p; (*btm_cb.api.p_sp_callback) (BTM_SP_KEYPRESS_EVT, (tBTM_SP_EVT_DATA *)&evt_data); } } /******************************************************************************* ** ** Function btm_simple_pair_complete ** ** Description This function is called when simple pairing process is ** complete ** ** Returns void ** *******************************************************************************/ void btm_simple_pair_complete (UINT8 *p) { tBTM_SP_COMPLT evt_data; tBTM_SEC_DEV_REC *p_dev_rec; UINT8 status; BOOLEAN disc = FALSE; status = *p++; STREAM_TO_BDADDR (evt_data.bd_addr, p); if ((p_dev_rec = btm_find_dev (evt_data.bd_addr)) == NULL) { BTM_TRACE_ERROR ("btm_simple_pair_complete() with unknown BDA: %08x%04x\n", (evt_data.bd_addr[0] << 24) + (evt_data.bd_addr[1] << 16) + (evt_data.bd_addr[2] << 8) + evt_data.bd_addr[3], (evt_data.bd_addr[4] << 8) + evt_data.bd_addr[5]); return; } #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("btm_simple_pair_complete() Pair State: %s Status:%d sec_state: %u\n", btm_pair_state_descr(btm_cb.pairing_state), status, p_dev_rec->sec_state); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE evt_data.status = BTM_ERR_PROCESSING; if (status == HCI_SUCCESS) { evt_data.status = BTM_SUCCESS; p_dev_rec->sec_flags |= BTM_SEC_AUTHENTICATED; } else { if (status == HCI_ERR_PAIRING_NOT_ALLOWED) { /* The test spec wants the peer device to get this failure code. */ btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_DISCONNECT); /* Change the timer to 1 second */ btu_start_timer (&btm_cb.pairing_tle, BTU_TTYPE_USER_FUNC, BT_1SEC_TIMEOUT); } else if (memcmp (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN) == 0) { /* stop the timer */ btu_stop_timer (&btm_cb.pairing_tle); if (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING) { /* the initiating side: will receive auth complete event. disconnect ACL at that time */ disc = TRUE; } } else { disc = TRUE; } } /* Let the pairing state stay active, p_auth_complete_callback will report the failure */ memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN); memcpy (evt_data.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN); if (btm_cb.api.p_sp_callback) { (*btm_cb.api.p_sp_callback) (BTM_SP_COMPLT_EVT, (tBTM_SP_EVT_DATA *)&evt_data); } if (disc) { /* simple pairing failed */ /* Avoid sending disconnect on HCI_ERR_PEER_USER */ if ((status != HCI_ERR_PEER_USER) && (status != HCI_ERR_CONN_CAUSE_LOCAL_HOST)) { btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle); } } } #endif ///SMP_INCLUDED == TRUE #if BTM_OOB_INCLUDED == TRUE && SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_rem_oob_req ** ** Description This function is called to process/report ** HCI_REMOTE_OOB_DATA_REQUEST_EVT ** ** Returns void ** *******************************************************************************/ void btm_rem_oob_req (UINT8 *p) { UINT8 *p_bda; tBTM_SP_RMT_OOB evt_data; tBTM_SEC_DEV_REC *p_dev_rec; BT_OCTET16 c; BT_OCTET16 r; p_bda = evt_data.bd_addr; STREAM_TO_BDADDR (p_bda, p); BTM_TRACE_EVENT ("btm_rem_oob_req() BDA: %02x:%02x:%02x:%02x:%02x:%02x\n", p_bda[0], p_bda[1], p_bda[2], p_bda[3], p_bda[4], p_bda[5]); if ( (NULL != (p_dev_rec = btm_find_dev (p_bda))) && btm_cb.api.p_sp_callback) { memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN); memcpy (evt_data.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN); BCM_STRNCPY_S((char *)evt_data.bd_name, sizeof(evt_data.bd_name), (char *)p_dev_rec->sec_bd_name, BTM_MAX_REM_BD_NAME_LEN + 1); evt_data.bd_name[BTM_MAX_REM_BD_NAME_LEN] = 0; btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP); if ((*btm_cb.api.p_sp_callback) (BTM_SP_RMT_OOB_EVT, (tBTM_SP_EVT_DATA *)&evt_data) == BTM_NOT_AUTHORIZED) { BTM_RemoteOobDataReply(TRUE, p_bda, c, r); } return; } /* something bad. we can only fail this connection */ btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY; btsnd_hcic_rem_oob_neg_reply (p_bda); } /******************************************************************************* ** ** Function btm_read_local_oob_complete ** ** Description This function is called when read local oob data is ** completed by the LM ** ** Returns void ** *******************************************************************************/ void btm_read_local_oob_complete (UINT8 *p) { tBTM_SP_LOC_OOB evt_data; UINT8 status = *p++; BTM_TRACE_EVENT ("btm_read_local_oob_complete:%d\n", status); if (status == HCI_SUCCESS) { evt_data.status = BTM_SUCCESS; STREAM_TO_ARRAY16(evt_data.c, p); STREAM_TO_ARRAY16(evt_data.r, p); } else { evt_data.status = BTM_ERR_PROCESSING; } if (btm_cb.api.p_sp_callback) { (*btm_cb.api.p_sp_callback) (BTM_SP_LOC_OOB_EVT, (tBTM_SP_EVT_DATA *)&evt_data); } } #endif /* BTM_OOB_INCLUDED */ /******************************************************************************* ** ** Function btm_sec_auth_collision ** ** Description This function is called when authentication or encryption ** needs to be retried at a later time. ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_sec_auth_collision (UINT16 handle) { tBTM_SEC_DEV_REC *p_dev_rec; if (!btm_cb.collision_start_time) { btm_cb.collision_start_time = osi_time_get_os_boottime_ms(); } if ((osi_time_get_os_boottime_ms() - btm_cb.collision_start_time) < btm_cb.max_collision_delay) { if (handle == BTM_SEC_INVALID_HANDLE) { if ((p_dev_rec = btm_sec_find_dev_by_sec_state (BTM_SEC_STATE_AUTHENTICATING)) == NULL) { p_dev_rec = btm_sec_find_dev_by_sec_state (BTM_SEC_STATE_ENCRYPTING); } } else { p_dev_rec = btm_find_dev_by_handle (handle); } if (p_dev_rec != NULL) { BTM_TRACE_DEBUG ("btm_sec_auth_collision: state %d (retrying in a moment...)\n", p_dev_rec->sec_state); /* We will restart authentication after timeout */ if (p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING || p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING) { p_dev_rec->sec_state = 0; } btm_cb.p_collided_dev_rec = p_dev_rec; btm_cb.sec_collision_tle.param = (UINT32) btm_sec_collision_timeout; btu_start_timer (&btm_cb.sec_collision_tle, BTU_TTYPE_USER_FUNC, BT_1SEC_TIMEOUT); } } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_auth_complete ** ** Description This function is when authentication of the connection is ** completed by the LM ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_auth_complete (UINT16 handle, UINT8 status) { UINT8 old_sm4; tBTM_PAIRING_STATE old_state = btm_cb.pairing_state; tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle); BOOLEAN are_bonding = FALSE; /* Commenting out trace due to obf/compilation problems. */ #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) if (p_dev_rec) { BTM_TRACE_EVENT ("Security Manager: auth_complete PairState: %s handle:%u status:%d dev->sec_state: %u Bda:%08x, RName:%s\n", btm_pair_state_descr (btm_cb.pairing_state), handle, status, p_dev_rec->sec_state, (p_dev_rec->bd_addr[2] << 24) + (p_dev_rec->bd_addr[3] << 16) + (p_dev_rec->bd_addr[4] << 8) + p_dev_rec->bd_addr[5], p_dev_rec->sec_bd_name); } else { BTM_TRACE_EVENT ("Security Manager: auth_complete PairState: %s handle:%u status:%d\n", btm_pair_state_descr (btm_cb.pairing_state), handle, status); } #endif /* For transaction collision we need to wait and repeat. There is no need */ /* for random timeout because only slave should receive the result */ if ((status == HCI_ERR_LMP_ERR_TRANS_COLLISION) || (status == HCI_ERR_DIFF_TRANSACTION_COLLISION)) { btm_sec_auth_collision(handle); return; } btm_cb.collision_start_time = 0; btm_restore_mode(); /* Check if connection was made just to do bonding. If we authenticate the connection that is up, this is the last event received. */ if (p_dev_rec && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) && !(btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE)) { p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE; l2cu_start_post_bond_timer (p_dev_rec->hci_handle); } if (!p_dev_rec) { return; } /* keep the old sm4 flag and clear the retry bit in control block */ old_sm4 = p_dev_rec->sm4; p_dev_rec->sm4 &= ~BTM_SM4_RETRY; if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) && (memcmp (p_dev_rec->bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) ) { are_bonding = TRUE; } if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (p_dev_rec->bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) ) { btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); } if (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING) { if ( (btm_cb.api.p_auth_complete_callback && status != HCI_SUCCESS) && (old_state != BTM_PAIR_STATE_IDLE) ) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, status); } return; } /* There can be a race condition, when we are starting authentication and ** the peer device is doing encryption. ** If first we receive encryption change up, then initiated authentication ** can not be performed. According to the spec we can not do authentication ** on the encrypted link, so device is correct. */ if ((status == HCI_ERR_COMMAND_DISALLOWED) && ((p_dev_rec->sec_flags & (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED)) == (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED))) { status = HCI_SUCCESS; } /* Currently we do not notify user if it is a keyboard which connects */ /* User probably Disabled the keyboard while it was asleap. Let her try */ if (btm_cb.api.p_auth_complete_callback) { /* report the suthentication status */ if (old_state != BTM_PAIR_STATE_IDLE) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, status); } } p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; /* If this is a bonding procedure can disconnect the link now */ if (are_bonding) { p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE; if (status != HCI_SUCCESS) { if (((status != HCI_ERR_PEER_USER) && (status != HCI_ERR_CONN_CAUSE_LOCAL_HOST))) { btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_PEER_USER, p_dev_rec->hci_handle); } } else { BTM_TRACE_DEBUG ("TRYING TO DECIDE IF CAN USE SMP_BR_CHNL\n"); if (p_dev_rec->new_encryption_key_is_p256 && (btm_sec_use_smp_br_chnl(p_dev_rec)) /* no LE keys are available, do deriving */ && (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN) || /* or BR key is higher security than existing LE keys */ (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED) && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)))) { BTM_TRACE_DEBUG ("link encrypted afer dedic bonding can use SMP_BR_CHNL\n"); if (btm_sec_is_master(p_dev_rec)) { // Encryption is required to start SM over BR/EDR // indicate that this is encryption after authentication BTM_SetEncryption(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR, NULL, NULL); } } l2cu_start_post_bond_timer (p_dev_rec->hci_handle); } return; } /* If authentication failed, notify the waiting layer */ if (status != HCI_SUCCESS) { if ((old_sm4 & BTM_SM4_RETRY) == 0) { /* allow retry only once */ if (status == HCI_ERR_LMP_ERR_TRANS_COLLISION) { /* not retried yet. set the retry bit */ p_dev_rec->sm4 |= BTM_SM4_RETRY; BTM_TRACE_DEBUG ("Collision retry sm4:x%x sec_flags:0x%x\n", p_dev_rec->sm4, p_dev_rec->sec_flags); } /* this retry for missing key is for Lisbon or later only. * Legacy device do not need this. the controller will drive the retry automatically */ else if (HCI_ERR_KEY_MISSING == status && BTM_SEC_IS_SM4(p_dev_rec->sm4)) { /* not retried yet. set the retry bit */ p_dev_rec->sm4 |= BTM_SM4_RETRY; p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_KNOWN; BTM_TRACE_DEBUG ("Retry for missing key sm4:x%x sec_flags:0x%x\n", p_dev_rec->sm4, p_dev_rec->sec_flags); /* With BRCM controller, we do not need to delete the stored link key in controller. If the stack may sit on top of other controller, we may need this BTM_DeleteStoredLinkKey (bd_addr, NULL); */ } if (p_dev_rec->sm4 & BTM_SM4_RETRY) { btm_sec_execute_procedure (p_dev_rec); return; } } btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE); if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) { btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle); } return; } p_dev_rec->sec_flags |= BTM_SEC_AUTHENTICATED; if (p_dev_rec->pin_code_length >= 16 || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) { // If we have MITM protection we have a higher level of security than // provided by 16 digits PIN p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED; } /* Authentication succeeded, execute the next security procedure, if any */ status = btm_sec_execute_procedure (p_dev_rec); /* If there is no next procedure, or procedure failed to start, notify the caller */ if (status != BTM_CMD_STARTED) { btm_sec_dev_rec_cback_event (p_dev_rec, status, FALSE); } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_encrypt_change ** ** Description This function is when encryption of the connection is ** completed by the LM ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_encrypt_change (UINT16 handle, UINT8 status, UINT8 encr_enable) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle); #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE tACL_CONN *p_acl = NULL; UINT8 acl_idx = btm_handle_to_acl_index(handle); #endif BTM_TRACE_EVENT ("Security Manager: encrypt_change status:%d State:%d, encr_enable = %d\n", status, (p_dev_rec) ? p_dev_rec->sec_state : 0, encr_enable); BTM_TRACE_DEBUG ("before update p_dev_rec->sec_flags=0x%x\n", (p_dev_rec) ? p_dev_rec->sec_flags : 0 ); /* For transaction collision we need to wait and repeat. There is no need */ /* for random timeout because only slave should receive the result */ if ((status == HCI_ERR_LMP_ERR_TRANS_COLLISION) || (status == HCI_ERR_DIFF_TRANSACTION_COLLISION)) { btm_sec_auth_collision(handle); return; } btm_cb.collision_start_time = 0; if (!p_dev_rec) { return; } if ((status == HCI_SUCCESS) && encr_enable) { if (p_dev_rec->hci_handle == handle) { p_dev_rec->sec_flags |= (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED); if (p_dev_rec->pin_code_length >= 16 || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) { p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED; } } else { p_dev_rec->sec_flags |= (BTM_SEC_LE_AUTHENTICATED | BTM_SEC_LE_ENCRYPTED); } } /* It is possible that we decrypted the link to perform role switch */ /* mark link not to be encrypted, so that when we execute security next time it will kick in again */ if ((status == HCI_SUCCESS) && !encr_enable) { if (p_dev_rec->hci_handle == handle) { p_dev_rec->sec_flags &= ~BTM_SEC_ENCRYPTED; } else { p_dev_rec->sec_flags &= ~BTM_SEC_LE_ENCRYPTED; } } BTM_TRACE_DEBUG ("after update p_dev_rec->sec_flags=0x%x\n", p_dev_rec->sec_flags ); #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE if (acl_idx != MAX_L2CAP_LINKS) { p_acl = &btm_cb.acl_db[acl_idx]; } if (p_acl != NULL) { btm_sec_check_pending_enc_req(p_dev_rec, p_acl->transport, encr_enable); } if (p_acl && p_acl->transport == BT_TRANSPORT_LE) { if (status == HCI_ERR_KEY_MISSING || status == HCI_ERR_AUTH_FAILURE || status == HCI_ERR_ENCRY_MODE_NOT_ACCEPTABLE) { p_dev_rec->sec_flags &= ~ (BTM_SEC_LE_LINK_KEY_KNOWN); p_dev_rec->ble.key_type = BTM_LE_KEY_NONE; } btm_ble_link_encrypted(p_dev_rec->ble.pseudo_addr, encr_enable); return; } else { /* BR/EDR connection, update the encryption key size to be 16 as always */ p_dev_rec->enc_key_size = 16; } BTM_TRACE_DEBUG ("in %s new_encr_key_256 is %d\n", __func__, p_dev_rec->new_encryption_key_is_p256); if ((status == HCI_SUCCESS) && encr_enable && (p_dev_rec->hci_handle == handle)) { if (p_dev_rec->new_encryption_key_is_p256) { if (btm_sec_use_smp_br_chnl(p_dev_rec) && btm_sec_is_master(p_dev_rec) && /* if LE key is not known, do deriving */ (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN) || /* or BR key is higher security than existing LE keys */ (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED) && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)))) { /* BR/EDR is encrypted with LK that can be used to derive LE LTK */ p_dev_rec->new_encryption_key_is_p256 = FALSE; if (p_dev_rec->no_smp_on_br) { BTM_TRACE_DEBUG ("%s NO SM over BR/EDR\n", __func__); } else { BTM_TRACE_DEBUG ("%s start SM over BR/EDR\n", __func__); SMP_BR_PairWith(p_dev_rec->bd_addr); } } } else { // BR/EDR is successfully encrypted. Correct LK type if needed // (BR/EDR LK derived from LE LTK was used for encryption) if ((encr_enable == 1) && /* encryption is ON for SSP */ /* LK type is for BR/EDR SC */ (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256 || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256)) { if (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256) { p_dev_rec->link_key_type = BTM_LKEY_TYPE_UNAUTH_COMB; } else { /* BTM_LKEY_TYPE_AUTH_COMB_P_256 */ p_dev_rec->link_key_type = BTM_LKEY_TYPE_AUTH_COMB; } BTM_TRACE_DEBUG("updated link key type to %d\n", p_dev_rec->link_key_type); btm_send_link_key_notif(p_dev_rec); } } } #else btm_sec_check_pending_enc_req (p_dev_rec, BT_TRANSPORT_BR_EDR, encr_enable); #endif /* BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE */ /* If this encryption was started by peer do not need to do anything */ if (p_dev_rec->sec_state != BTM_SEC_STATE_ENCRYPTING) { if (BTM_SEC_STATE_DELAY_FOR_ENC == p_dev_rec->sec_state) { p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; p_dev_rec->p_callback = NULL; #if (CLASSIC_BT_INCLUDED == TRUE) l2cu_resubmit_pending_sec_req (p_dev_rec->bd_addr); #endif ///CLASSIC_BT_INCLUDED == TRUE } return; } p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; /* If encryption setup failed, notify the waiting layer */ if (status != HCI_SUCCESS) { btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE); return; } /* Encryption setup succeeded, execute the next security procedure, if any */ status = (UINT8)btm_sec_execute_procedure (p_dev_rec); /* If there is no next procedure, or procedure failed to start, notify the caller */ if (status != BTM_CMD_STARTED) { btm_sec_dev_rec_cback_event (p_dev_rec, status, FALSE); } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_connect_after_reject_timeout ** ** Description Connection for bonding could not start because of the collision ** Initiate outgoing connection ** ** Returns Pointer to the TLE struct ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_sec_connect_after_reject_timeout (TIMER_LIST_ENT *p_tle) { tBTM_SEC_DEV_REC *p_dev_rec = btm_cb.p_collided_dev_rec; UNUSED(p_tle); BTM_TRACE_EVENT ("btm_sec_connect_after_reject_timeout()\n"); btm_cb.sec_collision_tle.param = 0; btm_cb.p_collided_dev_rec = 0; if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) { BTM_TRACE_WARNING ("Security Manager: btm_sec_connect_after_reject_timeout: failed to start connection\n"); btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_ERR_MEMORY_FULL); } } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_connected ** ** Description This function is when a connection to the peer device is ** establsihed ** ** Returns void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) void btm_sec_connected (UINT8 *bda, UINT16 handle, UINT8 status, UINT8 enc_mode) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda); UINT8 res; BOOLEAN is_pairing_device = FALSE; tACL_CONN *p_acl_cb; UINT8 bit_shift = 0; btm_acl_resubmit_page(); /* Commenting out trace due to obf/compilation problems. */ #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) if (p_dev_rec) { BTM_TRACE_EVENT ("Security Manager: btm_sec_connected in state: %s handle:%d status:%d enc_mode:%d bda:%x RName:%s\n", btm_pair_state_descr(btm_cb.pairing_state), handle, status, enc_mode, (bda[2] << 24) + (bda[3] << 16) + (bda[4] << 8) + bda[5], p_dev_rec->sec_bd_name); } else { BTM_TRACE_EVENT ("Security Manager: btm_sec_connected in state: %s handle:%d status:%d enc_mode:%d bda:%x \n", btm_pair_state_descr(btm_cb.pairing_state), handle, status, enc_mode, (bda[2] << 24) + (bda[3] << 16) + (bda[4] << 8) + bda[5]); } #endif if (!p_dev_rec) { /* There is no device record for new connection. Allocate one */ if (status == HCI_SUCCESS) { p_dev_rec = btm_sec_alloc_dev (bda); } else { /* If the device matches with stored paring address * reset the paring state to idle */ if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN) == 0)) { btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE); } /* can not find the device record and the status is error, * just ignore it */ return; } } else { /* Update the timestamp for this device */ #if BLE_INCLUDED == TRUE bit_shift = (handle == p_dev_rec->ble_hci_handle) ? 8 : 0; #endif p_dev_rec->timestamp = btm_cb.dev_rec_count++; if (p_dev_rec->sm4 & BTM_SM4_CONN_PEND) { /* tell L2CAP it's a bonding connection. */ if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0) && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) ) { /* if incoming connection failed while pairing, then try to connect and continue */ /* Motorola S9 disconnects without asking pin code */ if ((status != HCI_SUCCESS) && (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_PIN_REQ)) { BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: incoming connection failed without asking PIN\n"); p_dev_rec->sm4 &= ~BTM_SM4_CONN_PEND; if (p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) { /* Start timer with 0 to initiate connection with new LCB */ /* because L2CAP will delete current LCB with this event */ btm_cb.p_collided_dev_rec = p_dev_rec; btm_cb.sec_collision_tle.param = (UINT32) btm_sec_connect_after_reject_timeout; btu_start_timer (&btm_cb.sec_collision_tle, BTU_TTYPE_USER_FUNC, 0); } else { btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME); BTM_ReadRemoteDeviceName(p_dev_rec->bd_addr, NULL, BT_TRANSPORT_BR_EDR); } #if BTM_DISC_DURING_RS == TRUE p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */ #endif return; } else { l2cu_update_lcb_4_bonding(p_dev_rec->bd_addr, TRUE); } } /* always clear the pending flag */ p_dev_rec->sm4 &= ~BTM_SM4_CONN_PEND; } } #if BLE_INCLUDED == TRUE p_dev_rec->device_type |= BT_DEVICE_TYPE_BREDR; #endif #if BTM_DISC_DURING_RS == TRUE p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */ #endif p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */ if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN) == 0) ) { /* if we rejected incoming connection from bonding device */ if ((status == HCI_ERR_HOST_REJECT_DEVICE) && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT)) { BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: HCI_Conn_Comp Flags:0x%04x, sm4: 0x%x\n", btm_cb.pairing_flags, p_dev_rec->sm4); btm_cb.pairing_flags &= ~BTM_PAIR_FLAGS_REJECTED_CONNECT; if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) { /* Try again: RNR when no ACL causes HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT */ btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME); BTM_ReadRemoteDeviceName(bda, NULL, BT_TRANSPORT_BR_EDR); return; } /* if we already have pin code */ if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_PIN) { /* Start timer with 0 to initiate connection with new LCB */ /* because L2CAP will delete current LCB with this event */ btm_cb.p_collided_dev_rec = p_dev_rec; btm_cb.sec_collision_tle.param = (UINT32) btm_sec_connect_after_reject_timeout; btu_start_timer (&btm_cb.sec_collision_tle, BTU_TTYPE_USER_FUNC, 0); } return; } /* wait for incoming connection without resetting pairing state */ else if (status == HCI_ERR_CONNECTION_EXISTS) { BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: Wait for incoming connection\n"); return; } is_pairing_device = TRUE; } /* If connection was made to do bonding restore link security if changed */ btm_restore_mode(); /* if connection fails during pin request, notify application */ if (status != HCI_SUCCESS) { /* If connection failed because of during pairing, need to tell user */ if (is_pairing_device) { p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE; p_dev_rec->sec_flags &= ~((BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED) << bit_shift); BTM_TRACE_DEBUG ("security_required:%x \n", p_dev_rec->security_required ); btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); /* We need to notify host that the key is not known any more */ if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, status); } } /* Do not send authentication failure, if following conditions hold good 1. BTM Sec Pairing state is idle 2. Link key for the remote device is present. 3. Remote is SSP capable. */ else if ((p_dev_rec->link_key_type <= BTM_LKEY_TYPE_REMOTE_UNIT) && (((status == HCI_ERR_AUTH_FAILURE) || (status == HCI_ERR_KEY_MISSING) || (status == HCI_ERR_HOST_REJECT_SECURITY) || (status == HCI_ERR_PAIRING_NOT_ALLOWED) || (status == HCI_ERR_UNIT_KEY_USED) || (status == HCI_ERR_PAIRING_WITH_UNIT_KEY_NOT_SUPPORTED) || (status == HCI_ERR_ENCRY_MODE_NOT_ACCEPTABLE) || (status == HCI_ERR_REPEATED_ATTEMPTS)))) { p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE; p_dev_rec->sec_flags &= ~ (BTM_SEC_LE_LINK_KEY_KNOWN << bit_shift); #ifdef BRCM_NOT_4_BTE /* If we rejected pairing, pass this special result code */ if (btm_cb.acl_disc_reason == HCI_ERR_HOST_REJECT_SECURITY) { status = HCI_ERR_HOST_REJECT_SECURITY; } #endif /* We need to notify host that the key is not known any more */ if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, status); } } if (status == HCI_ERR_CONNECTION_TOUT || status == HCI_ERR_LMP_RESPONSE_TIMEOUT || status == HCI_ERR_UNSPECIFIED || status == HCI_ERR_PAGE_TIMEOUT) { btm_sec_dev_rec_cback_event (p_dev_rec, BTM_DEVICE_TIMEOUT, FALSE); } else { btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE); } return; } /* If initiated dedicated bonding, return the link key now, and initiate disconnect */ /* If dedicated bonding, and we now have a link key, we are all done */ if ( is_pairing_device && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) ) { if (p_dev_rec->link_key_not_sent) { p_dev_rec->link_key_not_sent = FALSE; btm_send_link_key_notif(p_dev_rec); } p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE; /* remember flag before it is initialized */ if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) { res = TRUE; } else { res = FALSE; } if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_SUCCESS); } btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); if ( res ) { /* Let l2cap start bond timer */ l2cu_update_lcb_4_bonding (p_dev_rec->bd_addr, TRUE); } return; } p_dev_rec->hci_handle = handle; /* role may not be correct here, it will be updated by l2cap, but we need to */ /* notify btm_acl that link is up, so starting of rmt name request will not */ /* set paging flag up */ p_acl_cb = btm_bda_to_acl(bda, BT_TRANSPORT_BR_EDR); if (p_acl_cb) { /* whatever is in btm_establish_continue() without reporting the BTM_BL_CONN_EVT event */ #if (!defined(BTM_BYPASS_EXTRA_ACL_SETUP) || BTM_BYPASS_EXTRA_ACL_SETUP == FALSE) /* For now there are a some devices that do not like sending */ /* commands events and data at the same time. */ /* Set the packet types to the default allowed by the device */ btm_set_packet_types (p_acl_cb, btm_cb.btm_acl_pkt_types_supported); if (btm_cb.btm_def_link_policy) { BTM_SetLinkPolicy (p_acl_cb->remote_addr, &btm_cb.btm_def_link_policy); } #endif } btm_acl_created (bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, handle, HCI_ROLE_SLAVE, BT_TRANSPORT_BR_EDR); /* Initialize security flags. We need to do that because some */ /* authorization complete could have come after the connection is dropped */ /* and that would set wrong flag that link has been authorized already */ p_dev_rec->sec_flags &= ~((BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED | BTM_SEC_ROLE_SWITCHED) << bit_shift); if (enc_mode != HCI_ENCRYPT_MODE_DISABLED) { p_dev_rec->sec_flags |= ((BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED) << bit_shift); } if (btm_cb.security_mode == BTM_SEC_MODE_LINK) { p_dev_rec->sec_flags |= (BTM_SEC_AUTHENTICATED << bit_shift); } if (p_dev_rec->pin_code_length >= 16 || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) { p_dev_rec->sec_flags |= (BTM_SEC_16_DIGIT_PIN_AUTHED << bit_shift); } p_dev_rec->link_key_changed = FALSE; /* After connection is established we perform security if we do not know */ /* the name, or if we are originator because some procedure can have */ /* been scheduled while connection was down */ BTM_TRACE_DEBUG ("is_originator:%d \n", p_dev_rec->is_originator); if (!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) || p_dev_rec->is_originator) { if ((res = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED) { btm_sec_dev_rec_cback_event (p_dev_rec, res, FALSE); } } return; } /******************************************************************************* ** ** Function btm_sec_disconnect ** ** Description This function is called to disconnect HCI link ** ** Returns btm status ** *******************************************************************************/ tBTM_STATUS btm_sec_disconnect (UINT16 handle, UINT8 reason) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle); /* In some weird race condition we may not have a record */ if (!p_dev_rec) { btsnd_hcic_disconnect (handle, reason); return (BTM_SUCCESS); } /* If we are in the process of bonding we need to tell client that auth failed */ if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0) && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) ) { /* we are currently doing bonding. Link will be disconnected when done */ btm_cb.pairing_flags |= BTM_PAIR_FLAGS_DISC_WHEN_DONE; return (BTM_BUSY); } return (btm_sec_send_hci_disconnect(p_dev_rec, reason, handle)); } /******************************************************************************* ** ** Function btm_sec_disconnected ** ** Description This function is when a connection to the peer device is ** dropped ** ** Returns void ** *******************************************************************************/ void btm_sec_disconnected (UINT16 handle, UINT8 reason) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle); UINT8 old_pairing_flags = btm_cb.pairing_flags; int result = HCI_ERR_AUTH_FAILURE; tBTM_SEC_CALLBACK *p_callback = NULL; tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR; /* If page was delayed for disc complete, can do it now */ btm_cb.discing = FALSE; btm_acl_resubmit_page(); if (!p_dev_rec) { return; } p_dev_rec->enc_init_by_we = FALSE; transport = (handle == p_dev_rec->hci_handle) ? BT_TRANSPORT_BR_EDR : BT_TRANSPORT_LE; p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */ #if BTM_DISC_DURING_RS == TRUE p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */ #endif /* clear unused flags */ p_dev_rec->sm4 &= BTM_SM4_TRUE; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) uint8_t *bd_addr = (uint8_t *)p_dev_rec->bd_addr; BTM_TRACE_EVENT("%s sec_req:x%x state:%s reason:%d bd_addr:%02x:%02x:%02x:%02x:%02x:%02x" " remote_name:%s\n", __func__, p_dev_rec->security_required, btm_pair_state_descr(btm_cb.pairing_state), reason, bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5], p_dev_rec->sec_bd_name); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE BTM_TRACE_EVENT("%s before update sec_flags=0x%x\n", __func__, p_dev_rec->sec_flags); /* If we are in the process of bonding we need to tell client that auth failed */ if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0)) { btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_KNOWN; if (btm_cb.api.p_auth_complete_callback) { /* If the disconnection reason is REPEATED_ATTEMPTS, send this error message to complete callback function to display the error message of Repeated attempts. All others, send HCI_ERR_AUTH_FAILURE. */ if (reason == HCI_ERR_REPEATED_ATTEMPTS) { result = HCI_ERR_REPEATED_ATTEMPTS; } else if (old_pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) { result = HCI_ERR_HOST_REJECT_SECURITY; } (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, result); } } #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE btm_ble_update_mode_operation(HCI_ROLE_UNKNOWN, p_dev_rec->bd_addr, HCI_SUCCESS); /* see sec_flags processing in btm_acl_removed */ if (transport == BT_TRANSPORT_LE) { p_dev_rec->ble_hci_handle = BTM_SEC_INVALID_HANDLE; p_dev_rec->sec_flags &= ~(BTM_SEC_LE_AUTHENTICATED | BTM_SEC_LE_ENCRYPTED); p_dev_rec->enc_key_size = 0; } else #endif { p_dev_rec->hci_handle = BTM_SEC_INVALID_HANDLE; p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED | BTM_SEC_ROLE_SWITCHED | BTM_SEC_16_DIGIT_PIN_AUTHED); } #if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE if (p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING_BOTH) { p_dev_rec->sec_state = (transport == BT_TRANSPORT_LE) ? BTM_SEC_STATE_DISCONNECTING : BTM_SEC_STATE_DISCONNECTING_BLE; return; } #endif p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; p_dev_rec->security_required = BTM_SEC_NONE; p_callback = p_dev_rec->p_callback; /* if security is pending, send callback to clean up the security state */ if (p_callback) { p_dev_rec->p_callback = NULL; /* when the peer device time out the authentication before we do, this call back must be reset here */ (*p_callback) (p_dev_rec->bd_addr, transport, p_dev_rec->p_ref_data, BTM_ERR_PROCESSING); } BTM_TRACE_EVENT("%s after update sec_flags=0x%x\n", __func__, p_dev_rec->sec_flags); } /******************************************************************************* ** ** Function btm_sec_link_key_notification ** ** Description This function is called when a new connection link key is ** generated ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ void btm_sec_link_key_notification (UINT8 *p_bda, UINT8 *p_link_key, UINT8 key_type) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_bda); BOOLEAN we_are_bonding = FALSE; BOOLEAN ltk_derived_lk = FALSE; BTM_TRACE_EVENT ("btm_sec_link_key_notification() BDA:%04x%08x, TYPE: %d\n", (p_bda[0] << 8) + p_bda[1], (p_bda[2] << 24) + (p_bda[3] << 16) + (p_bda[4] << 8) + p_bda[5], key_type); if ((key_type >= BTM_LTK_DERIVED_LKEY_OFFSET + BTM_LKEY_TYPE_COMBINATION) && (key_type <= BTM_LTK_DERIVED_LKEY_OFFSET + BTM_LKEY_TYPE_AUTH_COMB_P_256)) { ltk_derived_lk = TRUE; key_type -= BTM_LTK_DERIVED_LKEY_OFFSET; } /* If connection was made to do bonding restore link security if changed */ btm_restore_mode(); if (key_type != BTM_LKEY_TYPE_CHANGED_COMB) { p_dev_rec->link_key_type = key_type; } p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_KNOWN; /* * Until this point in time, we do not know if MITM was enabled, hence we * add the extended security flag here. */ if (p_dev_rec->pin_code_length >= 16 || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB || p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) { p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED; } #if (BLE_INCLUDED == TRUE) /* BR/EDR connection, update the encryption key size to be 16 as always */ p_dev_rec->enc_key_size = 16; #endif memcpy (p_dev_rec->link_key, p_link_key, LINK_KEY_LEN); if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) && (memcmp (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN) == 0) ) { if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) { we_are_bonding = TRUE; } else { btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); } } /* save LTK derived LK no matter what */ if (ltk_derived_lk) { if (btm_cb.api.p_link_key_callback) { BTM_TRACE_DEBUG ("%s() Save LTK derived LK (key_type = %d)\n", __FUNCTION__, p_dev_rec->link_key_type); (*btm_cb.api.p_link_key_callback) (p_bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, p_link_key, p_dev_rec->link_key_type); } } else { if ((p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256) || (p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256)) { p_dev_rec->new_encryption_key_is_p256 = TRUE; BTM_TRACE_DEBUG ("%s set new_encr_key_256 to %d\n", __func__, p_dev_rec->new_encryption_key_is_p256); } } /* If name is not known at this point delay calling callback until the name is */ /* resolved. Unless it is a HID Device and we really need to send all link keys. */ if ((!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) && ((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) != BTM_COD_MAJOR_PERIPHERAL)) && !ltk_derived_lk) { BTM_TRACE_EVENT ("btm_sec_link_key_notification() Delayed BDA: %08x%04x Type:%d\n", (p_bda[0] << 24) + (p_bda[1] << 16) + (p_bda[2] << 8) + p_bda[3], (p_bda[4] << 8) + p_bda[5], key_type); p_dev_rec->link_key_not_sent = TRUE; /* If it is for bonding nothing else will follow, so we need to start name resolution */ if (we_are_bonding) { if (!(btsnd_hcic_rmt_name_req (p_bda, HCI_PAGE_SCAN_REP_MODE_R1, HCI_MANDATARY_PAGE_SCAN_MODE, 0))) { btm_inq_rmt_name_failed(); } } BTM_TRACE_EVENT ("rmt_io_caps:%d, sec_flags:x%x, dev_class[1]:x%02x\n", p_dev_rec->rmt_io_caps, p_dev_rec->sec_flags, p_dev_rec->dev_class[1]) return; } /* If its not us who perform authentication, we should tell stackserver */ /* that some authentication has been completed */ /* This is required when different entities receive link notification and auth complete */ if (!(p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE) /* for derived key, always send authentication callback for BR channel */ || ltk_derived_lk) { if (btm_cb.api.p_auth_complete_callback) { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_SUCCESS); } } /* We will save link key only if the user authorized it - BTE report link key in all cases */ #ifdef BRCM_NONE_BTE if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED) #endif { if (btm_cb.api.p_link_key_callback) { if (ltk_derived_lk) { BTM_TRACE_DEBUG ("btm_sec_link_key_notification() LTK derived LK is saved already" " (key_type = %d)\n", p_dev_rec->link_key_type); } else { (*btm_cb.api.p_link_key_callback) (p_bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, p_link_key, p_dev_rec->link_key_type); } } } } /******************************************************************************* ** ** Function btm_sec_link_key_request ** ** Description This function is called when controller requests link key ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ void btm_sec_link_key_request (UINT8 *p_bda) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_bda); BTM_TRACE_EVENT ("btm_sec_link_key_request() BDA: %02x:%02x:%02x:%02x:%02x:%02x\n", p_bda[0], p_bda[1], p_bda[2], p_bda[3], p_bda[4], p_bda[5]); if ( (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_PIN_REQ) && (btm_cb.collision_start_time != 0) && (memcmp (btm_cb.p_collided_dev_rec->bd_addr, p_bda, BD_ADDR_LEN) == 0) ) { BTM_TRACE_EVENT ("btm_sec_link_key_request() rejecting link key req " "State: %d START_TIMEOUT : %d\n", btm_cb.pairing_state, btm_cb.collision_start_time); btsnd_hcic_link_key_neg_reply (p_bda); return; } if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) { btsnd_hcic_link_key_req_reply (p_bda, p_dev_rec->link_key); return; } /* Notify L2CAP to increase timeout */ l2c_pin_code_request (p_bda); /* The link key is not in the database and it is not known to the manager */ btsnd_hcic_link_key_neg_reply (p_bda); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_pairing_timeout ** ** Description This function is called when host does not provide PIN ** within requested time ** ** Returns Pointer to the TLE struct ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_sec_pairing_timeout (TIMER_LIST_ENT *p_tle) { tBTM_CB *p_cb = &btm_cb; tBTM_SEC_DEV_REC *p_dev_rec; #if BTM_OOB_INCLUDED == TRUE #if (BTM_LOCAL_IO_CAPS == BTM_IO_CAP_NONE) tBTM_AUTH_REQ auth_req = BTM_AUTH_AP_NO; #else tBTM_AUTH_REQ auth_req = BTM_AUTH_AP_YES; #endif #endif UINT8 name[2]; UNUSED(p_tle); p_cb->pairing_tle.param = 0; /* Coverity: FALSE-POSITIVE error from Coverity tool. Please do NOT remove following comment. */ /* coverity[UNUSED_VALUE] pointer p_dev_rec is actually used several times... This is a Coverity false-positive, i.e. a fake issue. */ p_dev_rec = btm_find_dev (p_cb->pairing_bda); #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("btm_sec_pairing_timeout() State: %s Flags: %u\n", btm_pair_state_descr(p_cb->pairing_state), p_cb->pairing_flags); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE switch (p_cb->pairing_state) { case BTM_PAIR_STATE_WAIT_PIN_REQ: btm_sec_bond_cancel_complete(); break; case BTM_PAIR_STATE_WAIT_LOCAL_PIN: if ( (btm_cb.pairing_flags & BTM_PAIR_FLAGS_PRE_FETCH_PIN) == 0) { btsnd_hcic_pin_code_neg_reply (p_cb->pairing_bda); } btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); /* We need to notify the UI that no longer need the PIN */ if (btm_cb.api.p_auth_complete_callback) { if (p_dev_rec == NULL) { name[0] = 0; (*btm_cb.api.p_auth_complete_callback) (p_cb->pairing_bda, NULL, name, HCI_ERR_CONNECTION_TOUT); } else { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_ERR_CONNECTION_TOUT); } } break; case BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM: btsnd_hcic_user_conf_reply (p_cb->pairing_bda, FALSE); /* btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); */ break; #if (BT_SSP_INCLUDED == TRUE) case BTM_PAIR_STATE_KEY_ENTRY: btsnd_hcic_user_passkey_neg_reply(p_cb->pairing_bda); /* btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); */ break; #endif /* !BTM_IO_CAP_NONE */ #if BTM_OOB_INCLUDED == TRUE case BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS: if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) { auth_req |= BTM_AUTH_DD_BOND; } btsnd_hcic_io_cap_req_reply (p_cb->pairing_bda, btm_cb.devcb.loc_io_caps, BTM_OOB_NONE, auth_req); btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); break; case BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP: btsnd_hcic_rem_oob_neg_reply (p_cb->pairing_bda); btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); break; #endif /* BTM_OOB_INCLUDED */ case BTM_PAIR_STATE_WAIT_DISCONNECT: /* simple pairing failed. Started a 1-sec timer at simple pairing complete. * now it's time to tear down the ACL link*/ if (p_dev_rec == NULL) { BTM_TRACE_ERROR ("btm_sec_pairing_timeout() BTM_PAIR_STATE_WAIT_DISCONNECT unknown BDA: %08x%04x\n", (p_cb->pairing_bda[0] << 24) + (p_cb->pairing_bda[1] << 16) + (p_cb->pairing_bda[2] << 8) + p_cb->pairing_bda[3], (p_cb->pairing_bda[4] << 8) + p_cb->pairing_bda[5]); break; } btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle); btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); break; case BTM_PAIR_STATE_WAIT_AUTH_COMPLETE: case BTM_PAIR_STATE_GET_REM_NAME: /* We need to notify the UI that timeout has happened while waiting for authentication*/ btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); if (btm_cb.api.p_auth_complete_callback) { if (p_dev_rec == NULL) { name[0] = 0; (*btm_cb.api.p_auth_complete_callback) (p_cb->pairing_bda, NULL, name, HCI_ERR_CONNECTION_TOUT); } else { (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, HCI_ERR_CONNECTION_TOUT); } } break; default: #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_WARNING ("btm_sec_pairing_timeout() not processed state: %s\n", btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); break; } } /******************************************************************************* ** ** Function btm_sec_pin_code_request ** ** Description This function is called when controller requests PIN code ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ void btm_sec_pin_code_request (UINT8 *p_bda) { tBTM_SEC_DEV_REC *p_dev_rec; tBTM_CB *p_cb = &btm_cb; #ifdef PORCHE_PAIRING_CONFLICT UINT8 default_pin_code_len = 4; PIN_CODE default_pin_code = {0x30, 0x30, 0x30, 0x30}; #endif #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("btm_sec_pin_code_request() State: %s, BDA:%04x%08x\n", btm_pair_state_descr(btm_cb.pairing_state), (p_bda[0] << 8) + p_bda[1], (p_bda[2] << 24) + (p_bda[3] << 16) + (p_bda[4] << 8) + p_bda[5] ); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE if (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) { if ( (memcmp (p_bda, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) && (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_AUTH_COMPLETE) ) { /* fake this out - porshe carkit issue - */ // btm_cb.pairing_state = BTM_PAIR_STATE_IDLE; if (! btm_cb.pin_code_len_saved) { btsnd_hcic_pin_code_neg_reply (p_bda); return; } else { btsnd_hcic_pin_code_req_reply (p_bda, btm_cb.pin_code_len_saved, p_cb->pin_code); return; } } else if ((btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_PIN_REQ) || memcmp (p_bda, btm_cb.pairing_bda, BD_ADDR_LEN) != 0) { #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_WARNING ("btm_sec_pin_code_request() rejected - state: %s\n", btm_pair_state_descr(btm_cb.pairing_state)); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE #ifdef PORCHE_PAIRING_CONFLICT /* reply pin code again due to counter in_rand when local initiates pairing */ BTM_TRACE_EVENT ("btm_sec_pin_code_request from remote dev. for local initiated pairing\n"); if (! btm_cb.pin_code_len_saved) { btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); btsnd_hcic_pin_code_req_reply (p_bda, default_pin_code_len, default_pin_code); } else { btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); btsnd_hcic_pin_code_req_reply (p_bda, btm_cb.pin_code_len_saved, p_cb->pin_code); } #else btsnd_hcic_pin_code_neg_reply (p_bda); #endif return; } } p_dev_rec = btm_find_or_alloc_dev (p_bda); /* received PIN code request. must be non-sm4 */ p_dev_rec->sm4 = BTM_SM4_KNOWN; if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) { memcpy (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN); btm_cb.pairing_flags = BTM_PAIR_FLAGS_PEER_STARTED_DD; /* Make sure we reset the trusted mask to help against attacks */ BTM_SEC_CLR_TRUSTED_DEVICE(p_dev_rec->trusted_mask); } if (!p_cb->pairing_disabled && (p_cb->cfg.pin_type == HCI_PIN_TYPE_FIXED)) { BTM_TRACE_EVENT ("btm_sec_pin_code_request fixed pin replying\n"); btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); btsnd_hcic_pin_code_req_reply (p_bda, p_cb->cfg.pin_code_len, p_cb->cfg.pin_code); return; } /* Use the connecting device's CoD for the connection */ if ( (!memcmp (p_bda, p_cb->connecting_bda, BD_ADDR_LEN)) && (p_cb->connecting_dc[0] || p_cb->connecting_dc[1] || p_cb->connecting_dc[2]) ) { memcpy (p_dev_rec->dev_class, p_cb->connecting_dc, DEV_CLASS_LEN); } /* We could have started connection after asking user for the PIN code */ if (btm_cb.pin_code_len != 0) { BTM_TRACE_EVENT ("btm_sec_pin_code_request bonding sending reply\n"); btsnd_hcic_pin_code_req_reply (p_bda, btm_cb.pin_code_len, p_cb->pin_code); #ifdef PORCHE_PAIRING_CONFLICT btm_cb.pin_code_len_saved = btm_cb.pin_code_len; #endif /* Mark that we forwarded received from the user PIN code */ btm_cb.pin_code_len = 0; /* We can change mode back right away, that other connection being established */ /* is not forced to be secure - found a FW issue, so we can not do this btm_restore_mode(); */ btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE); } /* If pairing disabled OR (no PIN callback and not bonding) */ /* OR we could not allocate entry in the database reject pairing request */ else if (p_cb->pairing_disabled || (p_cb->api.p_pin_callback == NULL) /* OR Microsoft keyboard can for some reason try to establish connection */ /* the only thing we can do here is to shut it up. Normally we will be originator */ /* for keyboard bonding */ || (!p_dev_rec->is_originator && ((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) == BTM_COD_MAJOR_PERIPHERAL) && (p_dev_rec->dev_class[2] & BTM_COD_MINOR_KEYBOARD)) ) { BTM_TRACE_WARNING("btm_sec_pin_code_request(): Pairing disabled:%d; PIN callback:%p, Dev Rec:%p!\n", p_cb->pairing_disabled, p_cb->api.p_pin_callback, p_dev_rec); btsnd_hcic_pin_code_neg_reply (p_bda); } /* Notify upper layer of PIN request and start expiration timer */ else { btm_cb.pin_code_len_saved = 0; btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN); /* Pin code request can not come at the same time as connection request */ memcpy (p_cb->connecting_bda, p_bda, BD_ADDR_LEN); memcpy (p_cb->connecting_dc, p_dev_rec->dev_class, DEV_CLASS_LEN); BTM_TRACE_EVENT ("btm_sec_pin_code_request going for callback\n"); btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD; if (p_cb->api.p_pin_callback) { (*p_cb->api.p_pin_callback) (p_bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, (p_dev_rec->p_cur_service == NULL) ? FALSE : (p_dev_rec->p_cur_service->security_flags & BTM_SEC_IN_MIN_16_DIGIT_PIN)); } } return; } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_update_clock_offset ** ** Description This function is called to update clock offset ** ** Returns void ** *******************************************************************************/ void btm_sec_update_clock_offset (UINT16 handle, UINT16 clock_offset) { tBTM_SEC_DEV_REC *p_dev_rec; tBTM_INQ_INFO *p_inq_info; if ((p_dev_rec = btm_find_dev_by_handle (handle)) == NULL) { return; } p_dev_rec->clock_offset = clock_offset | BTM_CLOCK_OFFSET_VALID; if ((p_inq_info = BTM_InqDbRead(p_dev_rec->bd_addr)) == NULL) { return; } p_inq_info->results.clock_offset = clock_offset | BTM_CLOCK_OFFSET_VALID; } /****************************************************************** ** S T A T I C F U N C T I O N S *******************************************************************/ /******************************************************************************* ** ** Function btm_sec_execute_procedure ** ** Description This function is called to start required security ** procedure. There is a case when multiplexing protocol ** calls this function on the originating side, connection to ** the peer will not be established. This function in this ** case performs only authorization. ** ** Returns BTM_SUCCESS - permission is granted ** BTM_CMD_STARTED - in process ** BTM_NO_RESOURCES - permission declined ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static tBTM_STATUS btm_sec_execute_procedure (tBTM_SEC_DEV_REC *p_dev_rec) { BTM_TRACE_EVENT ("btm_sec_execute_procedure: Required:0x%x Flags:0x%x State:%d\n", p_dev_rec->security_required, p_dev_rec->sec_flags, p_dev_rec->sec_state); /* There is a chance that we are getting name. Wait until done. */ if (p_dev_rec->sec_state != 0) { return (BTM_CMD_STARTED); } /* If any security is required, get the name first */ if (!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) && (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE)) { BTM_TRACE_EVENT ("Security Manager: Start get name\n"); if (!btm_sec_start_get_name (p_dev_rec)) { return (BTM_NO_RESOURCES); } return (BTM_CMD_STARTED); } /* If connection is not authenticated and authentication is required */ /* start authentication and return PENDING to the caller */ if ((((!(p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) && (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE)) || (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_AUTHENTICATE)))) || (!(p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED) && (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN)))) && (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE)) { /* * We rely on BTM_SEC_16_DIGIT_PIN_AUTHED being set if MITM is in use, * as 16 DIGIT is only needed if MITM is not used. Unfortunately, the * BTM_SEC_AUTHENTICATED is used for both MITM and non-MITM * authenticated connections, hence we cannot distinguish here. */ #if (L2CAP_UCD_INCLUDED == TRUE) /* if incoming UCD packet, discard it */ if ( !p_dev_rec->is_originator && (p_dev_rec->is_ucd == TRUE )) { return (BTM_FAILED_ON_SECURITY); } #endif BTM_TRACE_EVENT ("Security Manager: Start authentication\n"); /* * If we do have a link-key, but we end up here because we need an * upgrade, then clear the link-key known and authenticated flag before * restarting authentication. * WARNING: If the controller has link-key, it is optional and * recommended for the controller to send a Link_Key_Request. * In case we need an upgrade, the only alternative would be to delete * the existing link-key. That could lead to very bad user experience * or even IOP issues, if a reconnect causes a new connection that * requires an upgrade. */ if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) && (!(p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED) && (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN)))) { p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED | BTM_SEC_AUTHENTICATED); } if (!btm_sec_start_authentication (p_dev_rec)) { return (BTM_NO_RESOURCES); } return (BTM_CMD_STARTED); } /* If connection is not encrypted and encryption is required */ /* start encryption and return PENDING to the caller */ if (!(p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) && (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_ENCRYPT)) || (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_ENCRYPT))) && (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE)) { #if (L2CAP_UCD_INCLUDED == TRUE) /* if incoming UCD packet, discard it */ if ( !p_dev_rec->is_originator && (p_dev_rec->is_ucd == TRUE )) { return (BTM_FAILED_ON_SECURITY); } #endif BTM_TRACE_EVENT ("Security Manager: Start encryption\n"); if (!btm_sec_start_encryption (p_dev_rec)) { return (BTM_NO_RESOURCES); } return (BTM_CMD_STARTED); } if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) && (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) { BTM_TRACE_EVENT("%s: Security Manager: SC only service, but link key type is 0x%02x -" "security failure\n", __FUNCTION__, p_dev_rec->link_key_type); return (BTM_FAILED_ON_SECURITY); } /* If connection is not authorized and authorization is required */ /* start authorization and return PENDING to the caller */ if (!(p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED) && (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_AUTHORIZE)) || (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_AUTHORIZE)))) { BTM_TRACE_EVENT ("service id:%d, is trusted:%d\n", p_dev_rec->p_cur_service->service_id, (BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask, p_dev_rec->p_cur_service->service_id))); if ((btm_sec_are_all_trusted(p_dev_rec->trusted_mask) == FALSE) && (p_dev_rec->p_cur_service->service_id < BTM_SEC_MAX_SERVICES) && (BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask, p_dev_rec->p_cur_service->service_id) == FALSE)) { BTM_TRACE_EVENT ("Security Manager: Start authorization\n"); return (btm_sec_start_authorization (p_dev_rec)); } } /* All required security procedures already established */ p_dev_rec->security_required &= ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_IN_AUTHORIZE | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT | BTM_SEC_IN_ENCRYPT | BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE); BTM_TRACE_EVENT ("Security Manager: trusted:0x%04x%04x\n", p_dev_rec->trusted_mask[1], p_dev_rec->trusted_mask[0]); BTM_TRACE_EVENT ("Security Manager: access granted\n"); return (BTM_SUCCESS); } /******************************************************************************* ** ** Function btm_sec_start_get_name ** ** Description This function is called to start get name procedure ** ** Returns TRUE if started ** *******************************************************************************/ static BOOLEAN btm_sec_start_get_name (tBTM_SEC_DEV_REC *p_dev_rec) { UINT8 tempstate = p_dev_rec->sec_state; p_dev_rec->sec_state = BTM_SEC_STATE_GETTING_NAME; /* Device should be connected, no need to provide correct page params */ /* 0 and NULL are as timeout and callback params because they are not used in security get name case */ if ((btm_initiate_rem_name (p_dev_rec->bd_addr, NULL, BTM_RMT_NAME_SEC, 0, NULL)) != BTM_CMD_STARTED) { p_dev_rec->sec_state = tempstate; return (FALSE); } return (TRUE); } /******************************************************************************* ** ** Function btm_sec_start_authentication ** ** Description This function is called to start authentication ** ** Returns TRUE if started ** *******************************************************************************/ static BOOLEAN btm_sec_start_authentication (tBTM_SEC_DEV_REC *p_dev_rec) { p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING; return (btsnd_hcic_auth_request (p_dev_rec->hci_handle)); } /******************************************************************************* ** ** Function btm_sec_start_encryption ** ** Description This function is called to start encryption ** ** Returns TRUE if started ** *******************************************************************************/ static BOOLEAN btm_sec_start_encryption (tBTM_SEC_DEV_REC *p_dev_rec) { if (!btsnd_hcic_set_conn_encrypt (p_dev_rec->hci_handle, TRUE)) { return (FALSE); } p_dev_rec->sec_state = BTM_SEC_STATE_ENCRYPTING; return (TRUE); } /******************************************************************************* ** ** Function btm_sec_start_authorization ** ** Description This function is called to start authorization ** ** Returns TRUE if started ** *******************************************************************************/ static UINT8 btm_sec_start_authorization (tBTM_SEC_DEV_REC *p_dev_rec) { UINT8 result; UINT8 *p_service_name = NULL; UINT8 service_id; if ((p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) || (p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE)) { if (!btm_cb.api.p_authorize_callback) { return (BTM_MODE_UNSUPPORTED); } if (p_dev_rec->p_cur_service) { #if BTM_SEC_SERVICE_NAME_LEN > 0 if (p_dev_rec->is_originator) { p_service_name = p_dev_rec->p_cur_service->orig_service_name; } else { p_service_name = p_dev_rec->p_cur_service->term_service_name; } #endif service_id = p_dev_rec->p_cur_service->service_id; } else { service_id = 0; } /* Send authorization request if not already sent during this service connection */ if (p_dev_rec->last_author_service_id == BTM_SEC_NO_LAST_SERVICE_ID || p_dev_rec->last_author_service_id != service_id) { p_dev_rec->sec_state = BTM_SEC_STATE_AUTHORIZING; result = (*btm_cb.api.p_authorize_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, p_service_name, service_id, p_dev_rec->is_originator); } else { /* Already authorized once for this L2CAP bringup */ BTM_TRACE_DEBUG ("btm_sec_start_authorization: (Ignoring extra Authorization prompt for service %d)\n", service_id); return (BTM_SUCCESS); } if (result == BTM_SUCCESS) { p_dev_rec->sec_flags |= BTM_SEC_AUTHORIZED; /* Save the currently authorized service in case we are asked again by another multiplexer layer */ if (!p_dev_rec->is_originator) { p_dev_rec->last_author_service_id = service_id; } p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; } return (result); } btm_sec_start_get_name (p_dev_rec); return (BTM_CMD_STARTED); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_are_all_trusted ** ** Description This function is called check if all services are trusted ** ** Returns TRUE if all are trusted, otherwise FALSE ** *******************************************************************************/ BOOLEAN btm_sec_are_all_trusted(UINT32 p_mask[]) { UINT32 trusted_inx; for (trusted_inx = 0; trusted_inx < BTM_SEC_SERVICE_ARRAY_SIZE; trusted_inx++) { if (p_mask[trusted_inx] != BTM_SEC_TRUST_ALL) { return (FALSE); } } return (TRUE); } /******************************************************************************* ** ** Function btm_sec_find_first_serv ** ** Description Look for the first record in the service database ** with specified PSM ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) tBTM_SEC_SERV_REC *btm_sec_find_first_serv (CONNECTION_TYPE conn_type, UINT16 psm) { tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0]; int i; BOOLEAN is_originator; #if (L2CAP_UCD_INCLUDED == TRUE) if ( conn_type & CONNECTION_TYPE_ORIG_MASK ) { is_originator = TRUE; } else { is_originator = FALSE; } #else is_originator = conn_type; #endif if (is_originator && btm_cb.p_out_serv && btm_cb.p_out_serv->psm == psm) { /* If this is outgoing connection and the PSM matches p_out_serv, * use it as the current service */ return btm_cb.p_out_serv; } /* otherwise, just find the first record with the specified PSM */ for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) { if ( (p_serv_rec->security_flags & BTM_SEC_IN_USE) && (p_serv_rec->psm == psm) ) { return (p_serv_rec); } } return (NULL); } /******************************************************************************* ** ** Function btm_sec_find_next_serv ** ** Description Look for the next record in the service database ** with specified PSM ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ static tBTM_SEC_SERV_REC *btm_sec_find_next_serv (tBTM_SEC_SERV_REC *p_cur) { tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0]; int i; for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) { if ((p_serv_rec->security_flags & BTM_SEC_IN_USE) && (p_serv_rec->psm == p_cur->psm) ) { if (p_cur != p_serv_rec) { return (p_serv_rec); } } } return (NULL); } /******************************************************************************* ** ** Function btm_sec_find_mx_serv ** ** Description Look for the record in the service database with specified ** PSM and multiplexor channel information ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ static tBTM_SEC_SERV_REC *btm_sec_find_mx_serv (UINT8 is_originator, UINT16 psm, UINT32 mx_proto_id, UINT32 mx_chan_id) { tBTM_SEC_SERV_REC *p_out_serv = btm_cb.p_out_serv; tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0]; int i; BTM_TRACE_DEBUG ("%s()\n", __func__); if (is_originator && p_out_serv && p_out_serv->psm == psm && p_out_serv->mx_proto_id == mx_proto_id && p_out_serv->orig_mx_chan_id == mx_chan_id) { /* If this is outgoing connection and the parameters match p_out_serv, * use it as the current service */ return btm_cb.p_out_serv; } /* otherwise, the old way */ for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) { if ((p_serv_rec->security_flags & BTM_SEC_IN_USE) && (p_serv_rec->psm == psm) && (p_serv_rec->mx_proto_id == mx_proto_id) && (( is_originator && (p_serv_rec->orig_mx_chan_id == mx_chan_id)) || (!is_originator && (p_serv_rec->term_mx_chan_id == mx_chan_id)))) { return (p_serv_rec); } } return (NULL); } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_collision_timeout ** ** Description Encryption could not start because of the collision ** try to do it again ** ** Returns Pointer to the TLE struct ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_sec_collision_timeout (TIMER_LIST_ENT *p_tle) { UNUSED(p_tle); BTM_TRACE_EVENT ("%s()\n", __func__); btm_cb.sec_collision_tle.param = 0; tBTM_STATUS status = btm_sec_execute_procedure (btm_cb.p_collided_dev_rec); /* If result is pending reply from the user or from the device is pending */ if (status != BTM_CMD_STARTED) { /* There is no next procedure or start of procedure failed, notify the waiting layer */ btm_sec_dev_rec_cback_event (btm_cb.p_collided_dev_rec, status, FALSE); } } /******************************************************************************* ** ** Function btm_send_link_key_notif ** ** Description This function is called when controller requests link key ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ static void btm_send_link_key_notif (tBTM_SEC_DEV_REC *p_dev_rec) { if (btm_cb.api.p_link_key_callback) { (*btm_cb.api.p_link_key_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, p_dev_rec->link_key, p_dev_rec->link_key_type); } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function BTM_ReadTrustedMask ** ** Description Get trusted mask for the peer device ** ** Parameters: bd_addr - Address of the device ** ** Returns NULL, if the device record is not found. ** otherwise, the trusted mask ** *******************************************************************************/ UINT32 *BTM_ReadTrustedMask (BD_ADDR bd_addr) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); if (p_dev_rec != NULL) { return (p_dev_rec->trusted_mask); } return NULL; } /******************************************************************************* ** ** Function btm_restore_mode ** ** Description This function returns the security mode to previous setting ** if it was changed during bonding. ** ** ** Parameters: void ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_restore_mode(void) { if (btm_cb.security_mode_changed) { btm_cb.security_mode_changed = FALSE; BTM_TRACE_DEBUG("%s() Auth enable -> %d\n", __func__, (btm_cb.security_mode == BTM_SEC_MODE_LINK)); btsnd_hcic_write_auth_enable ((UINT8)(btm_cb.security_mode == BTM_SEC_MODE_LINK)); } if (btm_cb.pin_type_changed) { btm_cb.pin_type_changed = FALSE; btsnd_hcic_write_pin_type (btm_cb.cfg.pin_type); } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_find_dev_by_sec_state ** ** Description Look for the record in the device database for the device ** which is being authenticated or encrypted ** ** Returns Pointer to the record or NULL ** *******************************************************************************/ tBTM_SEC_DEV_REC *btm_sec_find_dev_by_sec_state (UINT8 state) { #if (SMP_INCLUDED == TRUE) tBTM_SEC_DEV_REC *p_dev_rec = &btm_cb.sec_dev_rec[0]; for (int i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) { if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE) && (p_dev_rec->sec_state == state)) { return (p_dev_rec); } } #endif ///SMP_INCLUDED == TRUE return (NULL); } /******************************************************************************* ** ** Function btm_sec_change_pairing_state ** ** Description This function is called to change pairing state ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static void btm_sec_change_pairing_state (tBTM_PAIRING_STATE new_state) { tBTM_PAIRING_STATE old_state = btm_cb.pairing_state; #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) BTM_TRACE_EVENT ("%s() Old: %s\n", __func__, btm_pair_state_descr(btm_cb.pairing_state)); BTM_TRACE_EVENT ("%s() New: %s pairing_flags:0x%x\n\n", __func__, btm_pair_state_descr(new_state), btm_cb.pairing_flags); #endif ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE btm_cb.pairing_state = new_state; if (new_state == BTM_PAIR_STATE_IDLE) { btu_stop_timer (&btm_cb.pairing_tle); btm_cb.pairing_flags = 0; btm_cb.pin_code_len = 0; /* Make sure the the lcb shows we are not bonding */ l2cu_update_lcb_4_bonding (btm_cb.pairing_bda, FALSE); btm_restore_mode(); btm_sec_check_pending_reqs(); btm_inq_clear_ssp(); memset (btm_cb.pairing_bda, 0xFF, BD_ADDR_LEN); } else { /* If transitionng out of idle, mark the lcb as bonding */ if (old_state == BTM_PAIR_STATE_IDLE) { l2cu_update_lcb_4_bonding (btm_cb.pairing_bda, TRUE); } btm_cb.pairing_tle.param = (TIMER_PARAM_TYPE)btm_sec_pairing_timeout; btu_start_timer (&btm_cb.pairing_tle, BTU_TTYPE_USER_FUNC, BTM_SEC_TIMEOUT_VALUE); } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_pair_state_descr ** ** Description Return state description for tracing ** *******************************************************************************/ #if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE) static char *btm_pair_state_descr (tBTM_PAIRING_STATE state) { #if (BT_TRACE_VERBOSE == TRUE) switch (state) { case BTM_PAIR_STATE_IDLE: return ("IDLE"); case BTM_PAIR_STATE_GET_REM_NAME: return ("GET_REM_NAME"); case BTM_PAIR_STATE_WAIT_PIN_REQ: return ("WAIT_PIN_REQ"); case BTM_PAIR_STATE_WAIT_LOCAL_PIN: return ("WAIT_LOCAL_PIN"); case BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM: return ("WAIT_NUM_CONFIRM"); case BTM_PAIR_STATE_KEY_ENTRY: return ("KEY_ENTRY"); case BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP: return ("WAIT_LOCAL_OOB_RSP"); case BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS: return ("WAIT_LOCAL_IOCAPS"); case BTM_PAIR_STATE_INCOMING_SSP: return ("INCOMING_SSP"); case BTM_PAIR_STATE_WAIT_AUTH_COMPLETE: return ("WAIT_AUTH_COMPLETE"); case BTM_PAIR_STATE_WAIT_DISCONNECT: return ("WAIT_DISCONNECT"); } return ("???"); #else sprintf(btm_cb.state_temp_buffer, "%d", state); return (btm_cb.state_temp_buffer); #endif } #endif /******************************************************************************* ** ** Function btm_sec_dev_rec_cback_event ** ** Description This function calls the callback function with the given ** result and clear the callback function. ** ** Parameters: void ** *******************************************************************************/ void btm_sec_dev_rec_cback_event (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 res, BOOLEAN is_le_transport) { tBTM_SEC_CALLBACK *p_callback = p_dev_rec->p_callback; if (p_dev_rec->p_callback) { p_dev_rec->p_callback = NULL; #if BLE_INCLUDED == TRUE if (is_le_transport) { (*p_callback) (p_dev_rec->ble.pseudo_addr, BT_TRANSPORT_LE, p_dev_rec->p_ref_data, res); } else #endif { (*p_callback) (p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR, p_dev_rec->p_ref_data, res); } } #if (SMP_INCLUDED == TRUE) btm_sec_check_pending_reqs(); #endif ///SMP_INCLUDED == TRUE } /******************************************************************************* ** ** Function btm_sec_queue_mx_request ** ** Description Return state description for tracing ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static BOOLEAN btm_sec_queue_mx_request (BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_orig, UINT32 mx_proto_id, UINT32 mx_chan_id, tBTM_SEC_CALLBACK *p_callback, void *p_ref_data) { tBTM_SEC_QUEUE_ENTRY *p_e = (tBTM_SEC_QUEUE_ENTRY *)osi_malloc (sizeof(tBTM_SEC_QUEUE_ENTRY)); if (p_e) { p_e->psm = psm; p_e->is_orig = is_orig; p_e->p_callback = p_callback; p_e->p_ref_data = p_ref_data; p_e->mx_proto_id = mx_proto_id; p_e->mx_chan_id = mx_chan_id; p_e->transport = BT_TRANSPORT_BR_EDR; memcpy (p_e->bd_addr, bd_addr, BD_ADDR_LEN); BTM_TRACE_EVENT ("%s() PSM: 0x%04x Is_Orig: %u mx_proto_id: %u mx_chan_id: %u\n", __func__, psm, is_orig, mx_proto_id, mx_chan_id); fixed_queue_enqueue(btm_cb.sec_pending_q, p_e); return (TRUE); } return (FALSE); } static BOOLEAN btm_sec_check_prefetch_pin (tBTM_SEC_DEV_REC *p_dev_rec) { UINT8 major = (UINT8)(p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK); UINT8 minor = (UINT8)(p_dev_rec->dev_class[2] & BTM_COD_MINOR_CLASS_MASK); BOOLEAN rv = FALSE; if ((major == BTM_COD_MAJOR_AUDIO) && ((minor == BTM_COD_MINOR_CONFM_HANDSFREE) || (minor == BTM_COD_MINOR_CAR_AUDIO)) ) { BTM_TRACE_EVENT ("%s() Skipping pre-fetch PIN for carkit COD Major: 0x%02x Minor: 0x%02x\n", __func__, major, minor); if (btm_cb.security_mode_changed == FALSE) { btm_cb.security_mode_changed = TRUE; #ifdef APPL_AUTH_WRITE_EXCEPTION if (!(APPL_AUTH_WRITE_EXCEPTION)(p_dev_rec->bd_addr)) #endif { btsnd_hcic_write_auth_enable (TRUE); } } } else { btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN); /* If we got a PIN, use that, else try to get one */ if (btm_cb.pin_code_len) { BTM_PINCodeReply (p_dev_rec->bd_addr, BTM_SUCCESS, btm_cb.pin_code_len, btm_cb.pin_code, p_dev_rec->trusted_mask); } else { /* pin was not supplied - pre-fetch pin code now */ if (btm_cb.api.p_pin_callback && ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PIN_REQD) == 0)) { BTM_TRACE_DEBUG("%s() PIN code callback called\n", __func__); if (btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR) == NULL) { btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD; } (btm_cb.api.p_pin_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, (p_dev_rec->p_cur_service == NULL) ? FALSE : (p_dev_rec->p_cur_service->security_flags & BTM_SEC_IN_MIN_16_DIGIT_PIN)); } } rv = TRUE; } return rv; } /******************************************************************************* ** ** Function btm_sec_auth_payload_tout ** ** Description Processes the HCI Autheniticated Payload Timeout Event ** indicating that a packet containing a valid MIC on the ** connection handle was not received within the programmed ** timeout value. (Spec Default is 30 secs, but can be ** changed via the BTM_SecSetAuthPayloadTimeout() function. ** *******************************************************************************/ void btm_sec_auth_payload_tout (UINT8 *p, UINT16 hci_evt_len) { UINT16 handle; STREAM_TO_UINT16 (handle, p); handle = HCID_GET_HANDLE (handle); /* Will be exposed to upper layers in the future if/when determined necessary */ BTM_TRACE_ERROR ("%s on handle 0x%02x\n", __func__, handle); } /******************************************************************************* ** ** Function btm_sec_queue_encrypt_request ** ** Description encqueue encryption request when device has active security ** process pending. ** *******************************************************************************/ static BOOLEAN btm_sec_queue_encrypt_request (BD_ADDR bd_addr, tBT_TRANSPORT transport, tBTM_SEC_CALLBACK *p_callback, void *p_ref_data) { tBTM_SEC_QUEUE_ENTRY *p_e; p_e = (tBTM_SEC_QUEUE_ENTRY *)osi_malloc(sizeof(tBTM_SEC_QUEUE_ENTRY) + 1); if (p_e) { p_e->psm = 0; /* if PSM 0, encryption request */ p_e->p_callback = p_callback; p_e->p_ref_data = (void *)(p_e + 1); *(UINT8 *)p_e->p_ref_data = *(UINT8 *)(p_ref_data); p_e->transport = transport; memcpy(p_e->bd_addr, bd_addr, BD_ADDR_LEN); fixed_queue_enqueue(btm_cb.sec_pending_q, p_e); return TRUE; } return FALSE; } /******************************************************************************* ** ** Function btm_sec_set_peer_sec_caps ** ** Description This function is called to set sm4 and rmt_sec_caps fields ** based on the available peer device features. ** ** Returns void ** *******************************************************************************/ void btm_sec_set_peer_sec_caps(tACL_CONN *p_acl_cb, tBTM_SEC_DEV_REC *p_dev_rec) { BD_ADDR rem_bd_addr; UINT8 *p_rem_bd_addr; if ((btm_cb.security_mode == BTM_SEC_MODE_SP || btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG || btm_cb.security_mode == BTM_SEC_MODE_SC) && HCI_SSP_HOST_SUPPORTED(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_1])) { p_dev_rec->sm4 = BTM_SM4_TRUE; p_dev_rec->remote_supports_secure_connections = (HCI_SC_HOST_SUPPORTED(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_1])); } else { p_dev_rec->sm4 = BTM_SM4_KNOWN; p_dev_rec->remote_supports_secure_connections = FALSE; } BTM_TRACE_API("%s: sm4: 0x%02x, rmt_support_for_secure_connections %d\n", __FUNCTION__, p_dev_rec->sm4, p_dev_rec->remote_supports_secure_connections); if (p_dev_rec->remote_features_needed) { BTM_TRACE_EVENT("%s: Now device in SC Only mode, waiting for peer remote features!\n", __FUNCTION__); p_rem_bd_addr = (UINT8 *) rem_bd_addr; BDADDR_TO_STREAM(p_rem_bd_addr, p_dev_rec->bd_addr); p_rem_bd_addr = (UINT8 *) rem_bd_addr; btm_io_capabilities_req(p_rem_bd_addr); p_dev_rec->remote_features_needed = FALSE; } } /******************************************************************************* ** ** Function btm_sec_is_serv_level0 ** ** Description This function is called to check if the service corresponding ** to PSM is security mode 4 level 0 service. ** ** Returns TRUE if the service is security mode 4 level 0 service ** *******************************************************************************/ static BOOLEAN btm_sec_is_serv_level0(UINT16 psm) { if (psm == BT_PSM_SDP) { BTM_TRACE_DEBUG("%s: PSM: 0x%04x -> mode 4 level 0 service\n", __FUNCTION__, psm); return TRUE; } return FALSE; } /******************************************************************************* ** ** Function btm_sec_check_pending_enc_req ** ** Description This function is called to send pending encryption callback if ** waiting ** ** Returns void ** *******************************************************************************/ static void btm_sec_check_pending_enc_req (tBTM_SEC_DEV_REC *p_dev_rec, tBT_TRANSPORT transport, UINT8 encr_enable) { if (fixed_queue_is_empty(btm_cb.sec_pending_q)) { return; } UINT8 res = encr_enable ? BTM_SUCCESS : BTM_ERR_PROCESSING; list_t *list = fixed_queue_get_list(btm_cb.sec_pending_q); for (const list_node_t *node = list_begin(list); node != list_end(list); ) { tBTM_SEC_QUEUE_ENTRY *p_e = (tBTM_SEC_QUEUE_ENTRY *)list_node(node); node = list_next(node); if (memcmp(p_e->bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0 && p_e->psm == 0 #if BLE_INCLUDED == TRUE && p_e->transport == transport #endif ) { #if BLE_INCLUDED == TRUE UINT8 sec_act = *(UINT8 *)(p_e->p_ref_data); #endif if (encr_enable == 0 || transport == BT_TRANSPORT_BR_EDR #if BLE_INCLUDED == TRUE || (sec_act == BTM_BLE_SEC_ENCRYPT || sec_act == BTM_BLE_SEC_ENCRYPT_NO_MITM) || (sec_act == BTM_BLE_SEC_ENCRYPT_MITM && p_dev_rec->sec_flags & BTM_SEC_LE_AUTHENTICATED) #endif ) { if (p_e->p_callback) { (*p_e->p_callback) (p_dev_rec->bd_addr, transport, p_e->p_ref_data, res); } fixed_queue_try_remove_from_queue(btm_cb.sec_pending_q, (void *)p_e); } } } } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_set_serv_level4_flags ** ** Description This function is called to set security mode 4 level 4 flags. ** ** Returns service security requirements updated to include secure ** connections only mode. ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static UINT16 btm_sec_set_serv_level4_flags(UINT16 cur_security, BOOLEAN is_originator) { UINT16 sec_level4_flags = is_originator ? BTM_SEC_OUT_LEVEL4_FLAGS : BTM_SEC_IN_LEVEL4_FLAGS; return cur_security | sec_level4_flags; } #endif ///SMP_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sec_clear_ble_keys ** ** Description This function is called to clear out the BLE keys. ** Typically when devices are removed in BTM_SecDeleteDevice, ** or when a new BT Link key is generated. ** ** Returns void ** *******************************************************************************/ void btm_sec_clear_ble_keys (tBTM_SEC_DEV_REC *p_dev_rec) { BTM_TRACE_DEBUG ("%s() Clearing BLE Keys\n", __func__); #if (SMP_INCLUDED== TRUE) p_dev_rec->ble.key_type = BTM_LE_KEY_NONE; memset (&p_dev_rec->ble.keys, 0, sizeof(tBTM_SEC_BLE_KEYS)); #if (BLE_PRIVACY_SPT == TRUE) btm_ble_resolving_list_remove_dev(p_dev_rec); #endif #endif } /******************************************************************************* ** ** Function btm_sec_is_a_bonded_dev ** ** Description Is the specified device is a bonded device ** ** Returns TRUE - dev is bonded ** *******************************************************************************/ BOOLEAN btm_sec_is_a_bonded_dev (BD_ADDR bda) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda); BOOLEAN is_bonded = FALSE; if (p_dev_rec && #if (SMP_INCLUDED == TRUE) ((p_dev_rec->ble.key_type && (p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN)) || #else ( #endif (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN))) { is_bonded = TRUE; } BTM_TRACE_DEBUG ("%s() is_bonded=%d\n", __func__, is_bonded); return (is_bonded); } /******************************************************************************* ** ** Function btm_sec_is_le_capable_dev ** ** Description Is the specified device is dual mode or LE only device ** ** Returns TRUE - dev is a dual mode ** *******************************************************************************/ BOOLEAN btm_sec_is_le_capable_dev (BD_ADDR bda) { tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda); BOOLEAN le_capable = FALSE; #if (BLE_INCLUDED== TRUE) if (p_dev_rec && (p_dev_rec->device_type & BT_DEVICE_TYPE_BLE) == BT_DEVICE_TYPE_BLE) { le_capable = TRUE; } #endif return le_capable; } /******************************************************************************* ** ** Function btm_sec_find_bonded_dev ** ** Description Find a bonded device starting from the specified index ** ** Returns TRUE - found a bonded device ** *******************************************************************************/ BOOLEAN btm_sec_find_bonded_dev (UINT8 start_idx, UINT8 *p_found_idx, tBTM_SEC_DEV_REC **p_rec) { BOOLEAN found = FALSE; #if (SMP_INCLUDED== TRUE) tBTM_SEC_DEV_REC *p_dev_rec; int i; if (start_idx >= BTM_SEC_MAX_DEVICE_RECORDS) { BTM_TRACE_DEBUG ("LE bonded device not found\n"); return found; } p_dev_rec = &btm_cb.sec_dev_rec[start_idx]; for (i = start_idx; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) { if (p_dev_rec->ble.key_type || (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) { *p_found_idx = i; *p_rec = p_dev_rec; break; } } BTM_TRACE_DEBUG ("%s() found=%d\n", __func__, found); #endif return (found); } /******************************************************************************* ** ** Function btm_sec_use_smp_br_chnl ** ** Description The function checks if SMP BR connection can be used with ** the peer. ** Is called when authentication for dedicated bonding is ** successfully completed. ** ** Returns TRUE - if SMP BR connection can be used (the link key is ** generated from P-256 and the peer supports Security ** Manager over BR). ** *******************************************************************************/ #if (SMP_INCLUDED == TRUE) static BOOLEAN btm_sec_use_smp_br_chnl(tBTM_SEC_DEV_REC *p_dev_rec) { UINT32 ext_feat; UINT8 chnl_mask[L2CAP_FIXED_CHNL_ARRAY_SIZE]; BTM_TRACE_DEBUG ("%s() link_key_type = 0x%x\n", __func__, p_dev_rec->link_key_type); if ((p_dev_rec->link_key_type != BTM_LKEY_TYPE_UNAUTH_COMB_P_256) && (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) { return FALSE; } if (!L2CA_GetPeerFeatures (p_dev_rec->bd_addr, &ext_feat, chnl_mask)) { return FALSE; } if (!(chnl_mask[0] & L2CAP_FIXED_CHNL_SMP_BR_BIT)) { return FALSE; } return TRUE; } /******************************************************************************* ** ** Function btm_sec_is_master ** ** Description The function checks if the device is BR/EDR master after ** pairing is completed. ** ** Returns TRUE - if the device is master. ** *******************************************************************************/ static BOOLEAN btm_sec_is_master(tBTM_SEC_DEV_REC *p_dev_rec) { tACL_CONN *p = btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR); return (p && (p->link_role == BTM_ROLE_MASTER)); } #endif ///SMP_INCLUDED == TRUE