291 lines
8.8 KiB
C
291 lines
8.8 KiB
C
/* client-tls-callback.c
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/* the usual suspects */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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/* ESP specific */
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#include "wifi_connect.h"
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/* socket includes */
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#include "lwip/netdb.h"
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#include "lwip/sockets.h"
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/* wolfSSL */
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#include <wolfssl/wolfcrypt/settings.h>
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#include <wolfssl/ssl.h>
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#include <wolfssl/certs_test.h>
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#ifdef WOLFSSL_TRACK_MEMORY
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#include <wolfssl/wolfcrypt/mem_track.h>
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#endif
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static const char* const TAG = "tls_client";
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#if defined(DEBUG_WOLFSSL)
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static void ShowCiphers(void)
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{
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char ciphers[4096];
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int ret = wolfSSL_get_ciphers(ciphers, (int)sizeof(ciphers));
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if (ret == WOLFSSL_SUCCESS)
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printf("%s\n", ciphers);
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}
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#endif
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#if defined(WOLFSSL_ESPWROOM32SE) && defined(HAVE_PK_CALLBACKS) \
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&& defined(WOLFSSL_ATECC508A)
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#include "wolfssl/wolfcrypt/port/atmel/atmel.h"
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/* when you want to use custom slot allocation */
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/* enable the definition CUSTOM_SLOT_ALLOCATION.*/
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#if defined(CUSTOM_SLOT_ALLOCATION)
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static byte mSlotList[ATECC_MAX_SLOT];
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int atmel_set_slot_allocator(atmel_slot_alloc_cb alloc,
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atmel_slot_dealloc_cb dealloc);
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/* initialize slot array */
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void my_atmel_slotInit()
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{
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int i;
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for(i=0;i<ATECC_MAX_SLOT; i++) {
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mSlotList[i] = ATECC_INVALID_SLOT;
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}
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}
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/* allocate slot depending on slotType */
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int my_atmel_alloc(int slotType)
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{
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int i, slot = -1;
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switch(slotType){
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case ATMEL_SLOT_ENCKEY:
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slot = 2;
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break;
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case ATMEL_SLOT_DEVICE:
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slot = 0;
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break;
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case ATMEL_SLOT_ECDHE:
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slot = 0;
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break;
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case ATMEL_SLOT_ECDHE_ENC:
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slot = 4;
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break;
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case ATMEL_SLOT_ANY:
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for(i=0;i<ATECC_MAX_SLOT;i++){
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if(mSlotList[i] == ATECC_INVALID_SLOT){
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slot = i;
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break;
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}
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}
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}
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return slot;
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}
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/* free slot array */
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void my_atmel_free(int slotId)
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{
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if(slotId >= 0 && slotId < ATECC_MAX_SLOT){
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mSlotList[slotId] = ATECC_INVALID_SLOT;
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}
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}
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#endif /* CUSTOM_SLOT_ALLOCATION */
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#endif /* WOLFSSL_ESPWROOM32SE && HAVE_PK_CALLBACK && WOLFSSL_ATECC508A */
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/* client task */
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void tls_smp_client_task()
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{
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int ret;
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int sockfd;
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int doPeerCheck;
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int sendGet;
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struct sockaddr_in servAddr;
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char buff[256];
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const char* ch = TLS_SMP_TARGET_HOST;
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size_t len;
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struct hostent *hp;
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struct ip4_addr *ip4_addr;
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const char sndMsg[] = "GET /index.html HTTP/1.0\r\n\r\n";
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/* declare wolfSSL objects */
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WOLFSSL_CTX *ctx;
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WOLFSSL *ssl;
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WOLFSSL_ENTER("tls_smp_client_task");
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doPeerCheck = 0;
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sendGet = 0;
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#ifdef DEBUG_WOLFSSL
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WOLFSSL_MSG("Debug ON");
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wolfSSL_Debugging_ON();
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ShowCiphers();
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#endif
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/* Initialize wolfSSL */
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wolfSSL_Init();
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/* Create a socket that uses an internet IPv4 address,
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* Sets the socket to be stream based (TCP),
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* 0 means choose the default protocol. */
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if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
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ESP_LOGE(TAG,"ERROR: failed to create the socket\n");
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}
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ESP_LOGI(TAG, "get target IP address");
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hp = gethostbyname(TLS_SMP_TARGET_HOST);
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if (!hp) {
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ESP_LOGE(TAG, "Failed to get host name.");
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ip4_addr = NULL;
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} else {
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ip4_addr = (struct ip4_addr *)hp->h_addr;
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ESP_LOGI(TAG, IPSTR, IP2STR(ip4_addr));
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}
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/* Create and initialize WOLFSSL_CTX */
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if ((ctx = wolfSSL_CTX_new(wolfSSLv23_client_method())) == NULL) {
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ESP_LOGE(TAG,"ERROR: failed to create WOLFSSL_CTX\n");
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}
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WOLFSSL_MSG("Loading...cert");
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/* Load client certificates into WOLFSSL_CTX */
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if ((ret = wolfSSL_CTX_load_verify_buffer(ctx, ca_cert_der_2048,
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sizeof_ca_cert_der_2048, WOLFSSL_FILETYPE_ASN1)) != SSL_SUCCESS) {
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ESP_LOGE(TAG,"ERROR: failed to load %d, please check the file.\n",ret);
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}
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/* not peer check */
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if( doPeerCheck == 0 ){
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wolfSSL_CTX_set_verify(ctx, WOLFSSL_VERIFY_NONE, 0);
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} else {
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WOLFSSL_MSG("Loading... our cert");
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/* load our certificate */
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if ((ret = wolfSSL_CTX_use_certificate_chain_buffer_format(ctx, client_cert_der_2048,
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sizeof_client_cert_der_2048, WOLFSSL_FILETYPE_ASN1)) != SSL_SUCCESS) {
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ESP_LOGE(TAG,"ERROR: failed to load chain %d, please check the file.\n",ret);
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}
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if ((ret = wolfSSL_CTX_use_PrivateKey_buffer(ctx, client_key_der_2048,
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sizeof_client_key_der_2048, WOLFSSL_FILETYPE_ASN1)) != SSL_SUCCESS) {
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wolfSSL_CTX_free(ctx); ctx = NULL;
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ESP_LOGE(TAG,"ERROR: failed to load key %d, please check the file.\n", ret);
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}
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wolfSSL_CTX_set_verify(ctx, WOLFSSL_VERIFY_PEER, 0);
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}
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/* Initialize the server address struct with zeros */
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memset(&servAddr, 0, sizeof(servAddr));
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/* Fill in the server address */
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servAddr.sin_family = AF_INET; /* using IPv4 */
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servAddr.sin_port = htons(DEFAULT_PORT); /* on DEFAULT_PORT */
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if(*ch >= '1' && *ch <= '9') {
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/* Get the server IPv4 address from the command line call */
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WOLFSSL_MSG("inet_pton");
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if ((ret = inet_pton(AF_INET, TLS_SMP_TARGET_HOST,
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&servAddr.sin_addr)) != 1) {
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ESP_LOGE(TAG,"ERROR: invalid address ret=%d\n", ret);
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}
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} else {
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servAddr.sin_addr.s_addr = ip4_addr->addr;
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}
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/* Connect to the server */
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sprintf(buff, "Connecting to server....%s(port:%d)", TLS_SMP_TARGET_HOST
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, DEFAULT_PORT);
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WOLFSSL_MSG(buff);
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printf("%s\n",buff);
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if ((ret = connect(sockfd, (struct sockaddr *)&servAddr,
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sizeof(servAddr))) == -1){
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ESP_LOGE(TAG,"ERROR: failed to connect ret=%d\n", ret);
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}
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WOLFSSL_MSG("Create a WOLFSSL object");
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/* Create a WOLFSSL object */
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if ((ssl = wolfSSL_new(ctx)) == NULL) {
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ESP_LOGE(TAG,"ERROR: failed to create WOLFSSL object\n");
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}
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/* when using atecc608a on esp32-wroom-32se */
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#if defined(WOLFSSL_ESPWROOM32SE) && defined(HAVE_PK_CALLBACKS) \
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&& defined(WOLFSSL_ATECC508A)
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atcatls_set_callbacks(ctx);
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/* when using custom slot-allocation */
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#if defined(CUSTOM_SLOT_ALLOCATION)
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my_atmel_slotInit();
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atmel_set_slot_allocator(my_atmel_alloc, my_atmel_free);
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#endif
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#endif
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/* Attach wolfSSL to the socket */
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wolfSSL_set_fd(ssl, sockfd);
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WOLFSSL_MSG("Connect to wolfSSL on the server side");
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/* Connect to wolfSSL on the server side */
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if (wolfSSL_connect(ssl) != SSL_SUCCESS) {
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ESP_LOGE(TAG,"ERROR: failed to connect to wolfSSL\n");
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}
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/* Get a message for the server from stdin */
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WOLFSSL_MSG("Message for server: ");
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memset(buff, 0, sizeof(buff));
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if(sendGet){
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printf("SSL connect ok, sending GET...\n");
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len = XSTRLEN(sndMsg);
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strncpy(buff, sndMsg, len);
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buff[len] = '\0';
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} else {
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sprintf(buff, "message from esp32 tls client\n");
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len = strnlen(buff, sizeof(buff));
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}
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/* Send the message to the server */
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if (wolfSSL_write(ssl, buff, len) != len) {
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ESP_LOGE(TAG,"ERROR: failed to write\n");
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}
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/* Read the server data into our buff array */
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memset(buff, 0, sizeof(buff));
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if (wolfSSL_read(ssl, buff, sizeof(buff) - 1) == -1) {
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ESP_LOGE(TAG,"ERROR: failed to read\n");
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}
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/* Print to stdout any data the server sends */
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printf("Server:");
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printf("%s", buff);
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/* Cleanup and return */
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wolfSSL_free(ssl); /* Free the wolfSSL object */
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wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
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wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
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close(sockfd); /* Close the connection to the server */
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vTaskDelete(NULL);
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return; /* Return reporting a success */
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}
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