coap: refactor examples, stylistic cleanups, move certs to independent dir
This commit is contained in:
parent
10c3b42f71
commit
a8bfe59bd1
14 changed files with 202 additions and 248 deletions
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@ -37,17 +37,12 @@ Example Connection Configuration --->
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* Set WiFi Password under Example Configuration
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* Set WiFi Password under Example Configuration
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Example CoAP Client Configuration --->
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Example CoAP Client Configuration --->
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* Set CoAP Target Uri
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* Set CoAP Target Uri
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* Set encryption method definitions (None, PSK or PKI)
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* If PSK, Set CoAP Preshared Key to use in connection to the server
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* If PSK Set CoAP Preshared Key to use in connection to the server
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* If PSK, Set CoAP PSK Client identity (username)
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* If PSK Set CoAP PSK Client identity (username)
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Enable CoAP debugging if required
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Component config --->
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Component config --->
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mbedTLS --->
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CoAP Configuration --->
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[*] Enable mbedtls certificate expiry check
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* Set encryption method definition, PSK (default) or PKI
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TLS Key Exchange Methods --->
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* Enable CoAP debugging if required
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[*] Enable pre-shared-key ciphersuites
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[*] Enable PSK based ciphersuite modes
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[*] Support DTLS protocol (all versions)
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### Build and Flash
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### Build and Flash
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@ -103,6 +98,4 @@ optional `path`, and begins with `coap://`, `coaps://` or `coap+tcp://`
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for a coap server that supports TCP
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for a coap server that supports TCP
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(not all do including coap+tcp://californium.eclipse.org).
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(not all do including coap+tcp://californium.eclipse.org).
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* CoAP logging can be enabled by running 'make menuconfig' and enable debugging
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* CoAP logging can be enabled by running 'idf.py menuconfig -> Component config -> CoAP Configuration' and setting appropriate log level
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* Encryption (MbedTLS) can be enabled by running 'make menuconfig' and enable debugging
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@ -1,4 +1,4 @@
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# Embed CA, certificate & key directly into binary
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# Embed CA, certificate & key directly into binary
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idf_component_register(SRCS "coap_client_example_main.c"
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idf_component_register(SRCS "coap_client_example_main.c"
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INCLUDE_DIRS "."
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INCLUDE_DIRS "."
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EMBED_TXTFILES coap_ca.pem coap_client.crt coap_client.key)
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EMBED_TXTFILES certs/coap_ca.pem certs/coap_client.crt certs/coap_client.key)
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@ -17,6 +17,7 @@
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#include <string.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netdb.h>
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#include <sys/param.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/task.h"
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@ -49,8 +50,8 @@
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instead of coap:// and the PSK must be one that the server supports
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instead of coap:// and the PSK must be one that the server supports
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(potentially associated with the IDENTITY)
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(potentially associated with the IDENTITY)
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*/
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*/
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#define EXAMPLE_COAP_PSK_KEY CONFIG_COAP_PSK_KEY
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#define EXAMPLE_COAP_PSK_KEY CONFIG_EXAMPLE_COAP_PSK_KEY
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#define EXAMPLE_COAP_PSK_IDENTITY CONFIG_COAP_PSK_IDENTITY
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#define EXAMPLE_COAP_PSK_IDENTITY CONFIG_EXAMPLE_COAP_PSK_IDENTITY
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/* The examples use uri Logging Level that
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/* The examples use uri Logging Level that
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you can set via 'make menuconfig'.
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you can set via 'make menuconfig'.
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@ -65,9 +66,9 @@
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you can set via the project configuration (idf.py menuconfig)
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you can set via the project configuration (idf.py menuconfig)
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If you'd rather not, just change the below entries to strings with
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If you'd rather not, just change the below entries to strings with
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the config you want - ie #define COAP_DEFAULT_DEMO_URI "coap://californium.eclipse.org"
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the config you want - ie #define COAP_DEFAULT_DEMO_URI "coaps://californium.eclipse.org"
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*/
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*/
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#define COAP_DEFAULT_DEMO_URI CONFIG_TARGET_DOMAIN_URI
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#define COAP_DEFAULT_DEMO_URI CONFIG_EXAMPLE_TARGET_DOMAIN_URI
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const static char *TAG = "CoAP_client";
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const static char *TAG = "CoAP_client";
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@ -75,11 +76,30 @@ static int resp_wait = 1;
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static coap_optlist_t *optlist = NULL;
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static coap_optlist_t *optlist = NULL;
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static int wait_ms;
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static int wait_ms;
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#ifdef CONFIG_COAP_MBEDTLS_PKI
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/* CA cert, taken from coap_ca.pem
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Client cert, taken from coap_client.crt
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Client key, taken from coap_client.key
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The PEM, CRT and KEY file are examples taken from the wpa2 enterprise
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example.
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To embed it in the app binary, the PEM, CRT and KEY file is named
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in the component.mk COMPONENT_EMBED_TXTFILES variable.
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*/
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extern uint8_t ca_pem_start[] asm("_binary_coap_ca_pem_start");
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extern uint8_t ca_pem_end[] asm("_binary_coap_ca_pem_end");
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extern uint8_t client_crt_start[] asm("_binary_coap_client_crt_start");
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extern uint8_t client_crt_end[] asm("_binary_coap_client_crt_end");
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extern uint8_t client_key_start[] asm("_binary_coap_client_key_start");
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extern uint8_t client_key_end[] asm("_binary_coap_client_key_end");
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#endif /* CONFIG_COAP_MBEDTLS_PKI */
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static void message_handler(coap_context_t *ctx, coap_session_t *session,
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static void message_handler(coap_context_t *ctx, coap_session_t *session,
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coap_pdu_t *sent, coap_pdu_t *received,
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coap_pdu_t *sent, coap_pdu_t *received,
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const coap_tid_t id)
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const coap_tid_t id)
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{
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{
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unsigned char* data = NULL;
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unsigned char *data = NULL;
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size_t data_len;
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size_t data_len;
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coap_pdu_t *pdu = NULL;
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coap_pdu_t *pdu = NULL;
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coap_opt_t *block_opt;
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coap_opt_t *block_opt;
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@ -106,8 +126,8 @@ static void message_handler(coap_context_t *ctx, coap_session_t *session,
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/* create pdu with request for next block */
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/* create pdu with request for next block */
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pdu = coap_new_pdu(session);
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pdu = coap_new_pdu(session);
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if (!pdu) {
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if (!pdu) {
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ESP_LOGE(TAG, "coap_new_pdu() failed");
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ESP_LOGE(TAG, "coap_new_pdu() failed");
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goto clean_up;
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goto clean_up;
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}
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}
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pdu->type = COAP_MESSAGE_CON;
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pdu->type = COAP_MESSAGE_CON;
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pdu->tid = coap_new_message_id(session);
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pdu->tid = coap_new_message_id(session);
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@ -121,7 +141,7 @@ static void message_handler(coap_context_t *ctx, coap_session_t *session,
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case COAP_OPTION_URI_PATH :
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case COAP_OPTION_URI_PATH :
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case COAP_OPTION_URI_QUERY :
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case COAP_OPTION_URI_QUERY :
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coap_add_option(pdu, option->number, option->length,
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coap_add_option(pdu, option->number, option->length,
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option->data);
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option->data);
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break;
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break;
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default:
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default:
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; /* skip other options */
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; /* skip other options */
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@ -133,8 +153,8 @@ static void message_handler(coap_context_t *ctx, coap_session_t *session,
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coap_add_option(pdu,
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coap_add_option(pdu,
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blktype,
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blktype,
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coap_encode_var_safe(buf, sizeof(buf),
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coap_encode_var_safe(buf, sizeof(buf),
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((coap_opt_block_num(block_opt) + 1) << 4) |
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((coap_opt_block_num(block_opt) + 1) << 4) |
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COAP_OPT_BLOCK_SZX(block_opt)), buf);
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COAP_OPT_BLOCK_SZX(block_opt)), buf);
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tid = coap_send(session, pdu);
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tid = coap_send(session, pdu);
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@ -155,41 +175,31 @@ clean_up:
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resp_wait = 0;
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resp_wait = 0;
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}
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}
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#ifdef CONFIG_MBEDTLS_COAP_PKI
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#ifdef CONFIG_COAP_MBEDTLS_PKI
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#ifdef __GNUC__
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#define UNUSED_PARAM __attribute__ ((unused))
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#else /* not a GCC */
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#define UNUSED_PARAM
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#endif /* GCC */
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#ifndef min
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#define min(a,b) ((a) < (b) ? (a) : (b))
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#endif
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static int
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static int
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verify_cn_callback(const char *cn,
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verify_cn_callback(const char *cn,
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const uint8_t *asn1_public_cert UNUSED_PARAM,
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const uint8_t *asn1_public_cert,
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size_t asn1_length UNUSED_PARAM,
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size_t asn1_length,
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coap_session_t *session UNUSED_PARAM,
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coap_session_t *session,
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unsigned depth,
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unsigned depth,
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int validated UNUSED_PARAM,
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int validated,
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void *arg UNUSED_PARAM
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void *arg
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) {
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)
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coap_log(LOG_INFO, "CN '%s' presented by server (%s)\n",
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{
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cn, depth ? "CA" : "Certificate");
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coap_log(LOG_INFO, "CN '%s' presented by server (%s)\n",
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return 1;
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cn, depth ? "CA" : "Certificate");
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return 1;
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}
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}
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#endif /* CONFIG_MBEDTLS_COAP_PKI */
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#endif /* CONFIG_COAP_MBEDTLS_PKI */
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static void coap_example_client(void *p)
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static void coap_example_client(void *p)
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{
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{
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struct hostent *hp;
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struct hostent *hp;
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coap_address_t dst_addr;
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coap_address_t dst_addr;
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static coap_uri_t uri;
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static coap_uri_t uri;
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const char* server_uri = COAP_DEFAULT_DEMO_URI;
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const char *server_uri = COAP_DEFAULT_DEMO_URI;
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char* phostname = NULL;
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char *phostname = NULL;
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coap_set_log_level(EXAMPLE_COAP_LOG_DEFAULT_LEVEL);
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coap_set_log_level(EXAMPLE_COAP_LOG_DEFAULT_LEVEL);
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@ -209,17 +219,16 @@ static void coap_example_client(void *p)
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break;
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break;
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}
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}
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if ((uri.scheme==COAP_URI_SCHEME_COAPS && !coap_dtls_is_supported()) ||
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if ((uri.scheme == COAP_URI_SCHEME_COAPS && !coap_dtls_is_supported()) ||
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(uri.scheme==COAP_URI_SCHEME_COAPS_TCP && !coap_tls_is_supported())) {
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(uri.scheme == COAP_URI_SCHEME_COAPS_TCP && !coap_tls_is_supported())) {
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ESP_LOGE(TAG, "CoAP server uri scheme is not supported");
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ESP_LOGE(TAG, "CoAP server uri scheme is not supported");
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break;
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break;
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}
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}
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phostname = (char *)calloc(1, uri.host.length + 1);
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phostname = (char *)calloc(1, uri.host.length + 1);
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if (phostname == NULL) {
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if (phostname == NULL) {
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ESP_LOGE(TAG, "calloc failed");
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ESP_LOGE(TAG, "calloc failed");
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continue;
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break;
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}
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}
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memcpy(phostname, uri.host.s, uri.host.length);
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memcpy(phostname, uri.host.s, uri.host.length);
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@ -230,12 +239,11 @@ static void coap_example_client(void *p)
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ESP_LOGE(TAG, "DNS lookup failed");
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ESP_LOGE(TAG, "DNS lookup failed");
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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free(phostname);
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free(phostname);
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goto clean_up;
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continue;
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}
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}
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{
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char tmpbuf[INET6_ADDRSTRLEN];
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char tmpbuf[INET6_ADDRSTRLEN];
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coap_address_init(&dst_addr);
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coap_address_init(&dst_addr);
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switch (hp->h_addrtype) {
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switch (hp->h_addrtype) {
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case AF_INET:
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case AF_INET:
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dst_addr.addr.sin.sin_family = AF_INET;
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dst_addr.addr.sin.sin_family = AF_INET;
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dst_addr.addr.sin.sin_port = htons(uri.port);
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dst_addr.addr.sin.sin_port = htons(uri.port);
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@ -253,7 +261,6 @@ static void coap_example_client(void *p)
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default:
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default:
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ESP_LOGE(TAG, "DNS lookup response failed");
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ESP_LOGE(TAG, "DNS lookup response failed");
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goto clean_up;
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goto clean_up;
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}
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}
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}
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if (uri.path.length) {
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if (uri.path.length) {
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@ -263,9 +270,9 @@ static void coap_example_client(void *p)
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while (res--) {
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while (res--) {
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coap_insert_optlist(&optlist,
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coap_insert_optlist(&optlist,
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coap_new_optlist(COAP_OPTION_URI_PATH,
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coap_new_optlist(COAP_OPTION_URI_PATH,
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coap_opt_length(buf),
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coap_opt_length(buf),
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coap_opt_value(buf)));
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coap_opt_value(buf)));
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buf += coap_opt_size(buf);
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buf += coap_opt_size(buf);
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}
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}
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@ -278,9 +285,9 @@ static void coap_example_client(void *p)
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while (res--) {
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while (res--) {
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coap_insert_optlist(&optlist,
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coap_insert_optlist(&optlist,
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coap_new_optlist(COAP_OPTION_URI_QUERY,
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coap_new_optlist(COAP_OPTION_URI_QUERY,
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coap_opt_length(buf),
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coap_opt_length(buf),
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coap_opt_value(buf)));
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coap_opt_value(buf)));
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buf += coap_opt_size(buf);
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buf += coap_opt_size(buf);
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}
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}
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@ -288,8 +295,8 @@ static void coap_example_client(void *p)
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ctx = coap_new_context(NULL);
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ctx = coap_new_context(NULL);
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if (!ctx) {
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if (!ctx) {
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ESP_LOGE(TAG, "coap_new_context() failed");
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ESP_LOGE(TAG, "coap_new_context() failed");
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goto clean_up;
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goto clean_up;
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}
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}
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/*
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/*
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@ -300,32 +307,16 @@ static void coap_example_client(void *p)
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* so COAP_URI_SCHEME_COAPS_TCP will have failed in a test above,
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* so COAP_URI_SCHEME_COAPS_TCP will have failed in a test above,
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* but the code is left in for completeness.
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* but the code is left in for completeness.
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*/
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*/
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if (uri.scheme==COAP_URI_SCHEME_COAPS || uri.scheme==COAP_URI_SCHEME_COAPS_TCP) {
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if (uri.scheme == COAP_URI_SCHEME_COAPS || uri.scheme == COAP_URI_SCHEME_COAPS_TCP) {
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#ifdef CONFIG_MBEDTLS_COAP_PSK
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#ifdef CONFIG_COAP_MBEDTLS_PSK
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session = coap_new_client_session_psk(ctx, NULL, &dst_addr,
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session = coap_new_client_session_psk(ctx, NULL, &dst_addr,
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uri.scheme==COAP_URI_SCHEME_COAPS ? COAP_PROTO_DTLS : COAP_PROTO_TLS,
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uri.scheme == COAP_URI_SCHEME_COAPS ? COAP_PROTO_DTLS : COAP_PROTO_TLS,
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EXAMPLE_COAP_PSK_IDENTITY,
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EXAMPLE_COAP_PSK_IDENTITY,
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(const uint8_t*)EXAMPLE_COAP_PSK_KEY,
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(const uint8_t *)EXAMPLE_COAP_PSK_KEY,
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sizeof(EXAMPLE_COAP_PSK_KEY)-1);
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sizeof(EXAMPLE_COAP_PSK_KEY) - 1);
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#endif /* CONFIG_MBEDTLS_COAP_PSK */
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#endif /* CONFIG_COAP_MBEDTLS_PSK */
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#ifdef CONFIG_MBEDTLS_COAP_PKI
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#ifdef CONFIG_COAP_MBEDTLS_PKI
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/* CA cert, taken from coap_ca.pem
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Client cert, taken from coap_client.crt
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Client key, taken from coap_client.key
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The PEM, CRT and KEY file are examples taken from the wpa2 enterprise
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example.
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To embed it in the app binary, the PEM, CRT and KEY file is named
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|
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in the component.mk COMPONENT_EMBED_TXTFILES variable.
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*/
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extern uint8_t ca_pem_start[] asm("_binary_coap_ca_pem_start");
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extern uint8_t ca_pem_end[] asm("_binary_coap_ca_pem_end");
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extern uint8_t client_crt_start[] asm("_binary_coap_client_crt_start");
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extern uint8_t client_crt_end[] asm("_binary_coap_client_crt_end");
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extern uint8_t client_key_start[] asm("_binary_coap_client_key_start");
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extern uint8_t client_key_end[] asm("_binary_coap_client_key_end");
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unsigned int ca_pem_bytes = ca_pem_end - ca_pem_start;
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unsigned int ca_pem_bytes = ca_pem_end - ca_pem_start;
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unsigned int client_crt_bytes = client_crt_end - client_crt_start;
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unsigned int client_crt_bytes = client_crt_end - client_crt_start;
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unsigned int client_key_bytes = client_key_end - client_key_start;
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unsigned int client_key_bytes = client_key_end - client_key_start;
|
||||||
|
@ -360,10 +351,11 @@ extern uint8_t client_key_end[] asm("_binary_coap_client_key_end");
|
||||||
dtls_pki.validate_sni_call_back = NULL;
|
dtls_pki.validate_sni_call_back = NULL;
|
||||||
dtls_pki.sni_call_back_arg = NULL;
|
dtls_pki.sni_call_back_arg = NULL;
|
||||||
memset(client_sni, 0, sizeof(client_sni));
|
memset(client_sni, 0, sizeof(client_sni));
|
||||||
if (uri.host.length)
|
if (uri.host.length) {
|
||||||
memcpy(client_sni, uri.host.s, min(uri.host.length, sizeof(client_sni)));
|
memcpy(client_sni, uri.host.s, MIN(uri.host.length, sizeof(client_sni)));
|
||||||
else
|
} else {
|
||||||
memcpy(client_sni, "localhost", 9);
|
memcpy(client_sni, "localhost", 9);
|
||||||
|
}
|
||||||
dtls_pki.client_sni = client_sni;
|
dtls_pki.client_sni = client_sni;
|
||||||
}
|
}
|
||||||
dtls_pki.pki_key.key_type = COAP_PKI_KEY_PEM_BUF;
|
dtls_pki.pki_key.key_type = COAP_PKI_KEY_PEM_BUF;
|
||||||
|
@ -375,30 +367,25 @@ extern uint8_t client_key_end[] asm("_binary_coap_client_key_end");
|
||||||
dtls_pki.pki_key.key.pem_buf.ca_cert_len = ca_pem_bytes;
|
dtls_pki.pki_key.key.pem_buf.ca_cert_len = ca_pem_bytes;
|
||||||
|
|
||||||
session = coap_new_client_session_pki(ctx, NULL, &dst_addr,
|
session = coap_new_client_session_pki(ctx, NULL, &dst_addr,
|
||||||
uri.scheme==COAP_URI_SCHEME_COAPS ? COAP_PROTO_DTLS : COAP_PROTO_TLS,
|
uri.scheme == COAP_URI_SCHEME_COAPS ? COAP_PROTO_DTLS : COAP_PROTO_TLS,
|
||||||
&dtls_pki);
|
&dtls_pki);
|
||||||
#endif /* CONFIG_MBEDTLS_COAP_PKI */
|
#endif /* CONFIG_COAP_MBEDTLS_PKI */
|
||||||
|
|
||||||
#ifdef CONFIG_MBEDTLS_COAP_NONE
|
|
||||||
session = coap_new_client_session(ctx, NULL, &dst_addr,
|
|
||||||
uri.scheme==COAP_URI_SCHEME_COAPS ? COAP_PROTO_DTLS : COAP_PROTO_TLS);
|
|
||||||
#endif /* CONFIG_MBEDTLS_COAP_NONE */
|
|
||||||
} else {
|
} else {
|
||||||
session = coap_new_client_session(ctx, NULL, &dst_addr,
|
session = coap_new_client_session(ctx, NULL, &dst_addr,
|
||||||
uri.scheme==COAP_URI_SCHEME_COAP_TCP ? COAP_PROTO_TCP :
|
uri.scheme == COAP_URI_SCHEME_COAP_TCP ? COAP_PROTO_TCP :
|
||||||
COAP_PROTO_UDP);
|
COAP_PROTO_UDP);
|
||||||
}
|
}
|
||||||
if (!session) {
|
if (!session) {
|
||||||
ESP_LOGE(TAG, "coap_new_client_session() failed");
|
ESP_LOGE(TAG, "coap_new_client_session() failed");
|
||||||
goto clean_up;
|
goto clean_up;
|
||||||
}
|
}
|
||||||
|
|
||||||
coap_register_response_handler(ctx, message_handler);
|
coap_register_response_handler(ctx, message_handler);
|
||||||
|
|
||||||
request = coap_new_pdu(session);
|
request = coap_new_pdu(session);
|
||||||
if (!request) {
|
if (!request) {
|
||||||
ESP_LOGE(TAG, "coap_new_pdu() failed");
|
ESP_LOGE(TAG, "coap_new_pdu() failed");
|
||||||
goto clean_up;
|
goto clean_up;
|
||||||
}
|
}
|
||||||
request->type = COAP_MESSAGE_CON;
|
request->type = COAP_MESSAGE_CON;
|
||||||
request->tid = coap_new_message_id(session);
|
request->tid = coap_new_message_id(session);
|
||||||
|
@ -413,12 +400,12 @@ extern uint8_t client_key_end[] asm("_binary_coap_client_key_end");
|
||||||
while (resp_wait) {
|
while (resp_wait) {
|
||||||
int result = coap_run_once(ctx, wait_ms > 1000 ? 1000 : wait_ms);
|
int result = coap_run_once(ctx, wait_ms > 1000 ? 1000 : wait_ms);
|
||||||
if (result >= 0) {
|
if (result >= 0) {
|
||||||
if (result >= wait_ms) {
|
if (result >= wait_ms) {
|
||||||
ESP_LOGE(TAG, "select timeout");
|
ESP_LOGE(TAG, "select timeout");
|
||||||
break;
|
break;
|
||||||
} else {
|
} else {
|
||||||
wait_ms -= result;
|
wait_ms -= result;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
clean_up:
|
clean_up:
|
||||||
|
@ -426,8 +413,12 @@ clean_up:
|
||||||
coap_delete_optlist(optlist);
|
coap_delete_optlist(optlist);
|
||||||
optlist = NULL;
|
optlist = NULL;
|
||||||
}
|
}
|
||||||
if (session) coap_session_release(session);
|
if (session) {
|
||||||
if (ctx) coap_free_context(ctx);
|
coap_session_release(session);
|
||||||
|
}
|
||||||
|
if (ctx) {
|
||||||
|
coap_free_context(ctx);
|
||||||
|
}
|
||||||
coap_cleanup();
|
coap_cleanup();
|
||||||
/*
|
/*
|
||||||
* change the following line to something like sleep(2)
|
* change the following line to something like sleep(2)
|
||||||
|
@ -445,14 +436,6 @@ void app_main(void)
|
||||||
tcpip_adapter_init();
|
tcpip_adapter_init();
|
||||||
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
||||||
|
|
||||||
#if 0
|
|
||||||
/* See https://github.com/Ebiroll/qemu_esp32 for further information */
|
|
||||||
#include "emul_ip.h"
|
|
||||||
if (is_running_qemu()) {
|
|
||||||
xTaskCreate(task_lwip_init, "task_lwip_init", 2*4096, NULL, 20, NULL);
|
|
||||||
}
|
|
||||||
else
|
|
||||||
#endif
|
|
||||||
/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
|
/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
|
||||||
* Read "Establishing Wi-Fi or Ethernet Connection" section in
|
* Read "Establishing Wi-Fi or Ethernet Connection" section in
|
||||||
* examples/protocols/README.md for more information about this function.
|
* examples/protocols/README.md for more information about this function.
|
||||||
|
|
|
@ -5,6 +5,4 @@
|
||||||
|
|
||||||
# embed files from the "certs" directory as binary data symbols
|
# embed files from the "certs" directory as binary data symbols
|
||||||
# in the app
|
# in the app
|
||||||
COMPONENT_EMBED_TXTFILES := coap_ca.pem
|
COMPONENT_EMBED_TXTFILES := certs/coap_ca.pem certs/coap_client.crt certs/coap_client.key
|
||||||
COMPONENT_EMBED_TXTFILES += coap_client.crt
|
|
||||||
COMPONENT_EMBED_TXTFILES += coap_client.key
|
|
||||||
|
|
|
@ -35,18 +35,11 @@ Example Connection Configuration --->
|
||||||
* Set WiFi SSID under Example Configuration
|
* Set WiFi SSID under Example Configuration
|
||||||
* Set WiFi Password under Example Configuration
|
* Set WiFi Password under Example Configuration
|
||||||
Example CoAP Client Configuration --->
|
Example CoAP Client Configuration --->
|
||||||
* Set CoAP Target Uri
|
* If PSK, Set CoAP Preshared Key to use in connection to the server
|
||||||
* Set encryption method definitions (None, PSK or PKI)
|
|
||||||
* If PSK Set CoAP Preshared Key to use in connection to the server
|
|
||||||
* If PSK Set CoAP PSK Client identity (username)
|
|
||||||
Enable CoAP debugging if required
|
|
||||||
Component config --->
|
Component config --->
|
||||||
mbedTLS --->
|
CoAP Configuration --->
|
||||||
[*] Enable mbedtls certificate expiry check
|
* Set encryption method definition, PSK (default) or PKI
|
||||||
TLS Key Exchange Methods --->
|
* Enable CoAP debugging if required
|
||||||
[*] Enable pre-shared-key ciphersuites
|
|
||||||
[*] Enable PSK based ciphersuite modes
|
|
||||||
[*] Support DTLS protocol (all versions)
|
|
||||||
|
|
||||||
### Build and Flash
|
### Build and Flash
|
||||||
|
|
||||||
|
@ -90,7 +83,4 @@ This can be found at https://libcoap.net/doc/reference/4.2.0/
|
||||||
* Please make sure CoAP client fetchs or puts data under path: `/Espressif` or
|
* Please make sure CoAP client fetchs or puts data under path: `/Espressif` or
|
||||||
fetches `/.well-known/core`
|
fetches `/.well-known/core`
|
||||||
|
|
||||||
* CoAP logging can be enabled by running 'make menuconfig' and enable debugging
|
* CoAP logging can be enabled by running 'idf.py menuconfig -> Component config -> CoAP Configuration' and setting appropriate log level
|
||||||
|
|
||||||
* Encryption (MbedTLS) can be enabled by running 'make menuconfig' and enable debugging
|
|
||||||
|
|
||||||
|
|
|
@ -1,3 +1,3 @@
|
||||||
idf_component_register(SRCS "coap_server_example_main.c"
|
idf_component_register(SRCS "coap_server_example_main.c"
|
||||||
INCLUDE_DIRS "."
|
INCLUDE_DIRS "."
|
||||||
EMBED_TXTFILES coap_ca.pem coap_server.crt coap_server.key)
|
EMBED_TXTFILES certs/coap_ca.pem certs/coap_server.crt certs/coap_server.key)
|
||||||
|
|
|
@ -46,7 +46,7 @@
|
||||||
instead of coap:// and the PSK must be one that the server supports
|
instead of coap:// and the PSK must be one that the server supports
|
||||||
(potentially associated with the IDENTITY)
|
(potentially associated with the IDENTITY)
|
||||||
*/
|
*/
|
||||||
#define EXAMPLE_COAP_PSK_KEY CONFIG_COAP_PSK_KEY
|
#define EXAMPLE_COAP_PSK_KEY CONFIG_EXAMPLE_COAP_PSK_KEY
|
||||||
|
|
||||||
/* The examples use CoAP Logging Level that
|
/* The examples use CoAP Logging Level that
|
||||||
you can set via 'make menuconfig'.
|
you can set via 'make menuconfig'.
|
||||||
|
@ -57,9 +57,30 @@
|
||||||
*/
|
*/
|
||||||
#define EXAMPLE_COAP_LOG_DEFAULT_LEVEL CONFIG_COAP_LOG_DEFAULT_LEVEL
|
#define EXAMPLE_COAP_LOG_DEFAULT_LEVEL CONFIG_COAP_LOG_DEFAULT_LEVEL
|
||||||
|
|
||||||
|
const static char *TAG = "CoAP_server";
|
||||||
|
|
||||||
static char espressif_data[100];
|
static char espressif_data[100];
|
||||||
static int espressif_data_len = 0;
|
static int espressif_data_len = 0;
|
||||||
|
|
||||||
|
#ifdef CONFIG_COAP_MBEDTLS_PKI
|
||||||
|
/* CA cert, taken from coap_ca.pem
|
||||||
|
Server cert, taken from coap_server.crt
|
||||||
|
Server key, taken from coap_server.key
|
||||||
|
|
||||||
|
The PEM, CRT and KEY file are examples taken from the wpa2 enterprise
|
||||||
|
example.
|
||||||
|
|
||||||
|
To embed it in the app binary, the PEM, CRT and KEY file is named
|
||||||
|
in the component.mk COMPONENT_EMBED_TXTFILES variable.
|
||||||
|
*/
|
||||||
|
extern uint8_t ca_pem_start[] asm("_binary_coap_ca_pem_start");
|
||||||
|
extern uint8_t ca_pem_end[] asm("_binary_coap_ca_pem_end");
|
||||||
|
extern uint8_t server_crt_start[] asm("_binary_coap_server_crt_start");
|
||||||
|
extern uint8_t server_crt_end[] asm("_binary_coap_server_crt_end");
|
||||||
|
extern uint8_t server_key_start[] asm("_binary_coap_server_key_start");
|
||||||
|
extern uint8_t server_key_end[] asm("_binary_coap_server_key_end");
|
||||||
|
#endif /* CONFIG_COAP_MBEDTLS_PKI */
|
||||||
|
|
||||||
#define INITIAL_DATA "Hello World!"
|
#define INITIAL_DATA "Hello World!"
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -93,8 +114,7 @@ hnd_espressif_put(coap_context_t *ctx,
|
||||||
|
|
||||||
if (strcmp (espressif_data, INITIAL_DATA) == 0) {
|
if (strcmp (espressif_data, INITIAL_DATA) == 0) {
|
||||||
response->code = COAP_RESPONSE_CODE(201);
|
response->code = COAP_RESPONSE_CODE(201);
|
||||||
}
|
} else {
|
||||||
else {
|
|
||||||
response->code = COAP_RESPONSE_CODE(204);
|
response->code = COAP_RESPONSE_CODE(204);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -125,32 +145,23 @@ hnd_espressif_delete(coap_context_t *ctx,
|
||||||
response->code = COAP_RESPONSE_CODE(202);
|
response->code = COAP_RESPONSE_CODE(202);
|
||||||
}
|
}
|
||||||
|
|
||||||
#ifdef CONFIG_MBEDTLS_COAP_PKI
|
#ifdef CONFIG_COAP_MBEDTLS_PKI
|
||||||
|
|
||||||
#ifdef __GNUC__
|
|
||||||
#define UNUSED_PARAM __attribute__ ((unused))
|
|
||||||
#else /* not a GCC */
|
|
||||||
#define UNUSED_PARAM
|
|
||||||
#endif /* GCC */
|
|
||||||
|
|
||||||
#ifndef min
|
|
||||||
#define min(a,b) ((a) < (b) ? (a) : (b))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
static int
|
static int
|
||||||
verify_cn_callback(const char *cn,
|
verify_cn_callback(const char *cn,
|
||||||
const uint8_t *asn1_public_cert UNUSED_PARAM,
|
const uint8_t *asn1_public_cert,
|
||||||
size_t asn1_length UNUSED_PARAM,
|
size_t asn1_length,
|
||||||
coap_session_t *session UNUSED_PARAM,
|
coap_session_t *session,
|
||||||
unsigned depth,
|
unsigned depth,
|
||||||
int validated UNUSED_PARAM,
|
int validated,
|
||||||
void *arg UNUSED_PARAM
|
void *arg
|
||||||
) {
|
)
|
||||||
coap_log(LOG_INFO, "CN '%s' presented by server (%s)\n",
|
{
|
||||||
cn, depth ? "CA" : "Certificate");
|
coap_log(LOG_INFO, "CN '%s' presented by server (%s)\n",
|
||||||
return 1;
|
cn, depth ? "CA" : "Certificate");
|
||||||
|
return 1;
|
||||||
}
|
}
|
||||||
#endif /* CONFIG_MBEDTLS_COAP_PKI */
|
#endif /* CONFIG_COAP_MBEDTLS_PKI */
|
||||||
|
|
||||||
static void coap_example_server(void *p)
|
static void coap_example_server(void *p)
|
||||||
{
|
{
|
||||||
|
@ -174,96 +185,85 @@ static void coap_example_server(void *p)
|
||||||
|
|
||||||
ctx = coap_new_context(NULL);
|
ctx = coap_new_context(NULL);
|
||||||
if (!ctx) {
|
if (!ctx) {
|
||||||
continue;
|
ESP_LOGE(TAG, "coap_new_context() failed");
|
||||||
|
continue;
|
||||||
}
|
}
|
||||||
#ifdef CONFIG_MBEDTLS_COAP_PSK
|
#ifdef CONFIG_COAP_MBEDTLS_PSK
|
||||||
/* Need PSK setup before we set up endpoints */
|
/* Need PSK setup before we set up endpoints */
|
||||||
coap_context_set_psk(ctx, "CoAP",
|
coap_context_set_psk(ctx, "CoAP",
|
||||||
(const uint8_t*)EXAMPLE_COAP_PSK_KEY,
|
(const uint8_t *)EXAMPLE_COAP_PSK_KEY,
|
||||||
sizeof(EXAMPLE_COAP_PSK_KEY)-1);
|
sizeof(EXAMPLE_COAP_PSK_KEY) - 1);
|
||||||
#endif /* CONFIG_MBEDTLS_COAP_PSK */
|
#endif /* CONFIG_COAP_MBEDTLS_PSK */
|
||||||
|
|
||||||
#ifdef CONFIG_MBEDTLS_COAP_PKI
|
#ifdef CONFIG_COAP_MBEDTLS_PKI
|
||||||
/* CA cert, taken from coap_ca.pem
|
unsigned int ca_pem_bytes = ca_pem_end - ca_pem_start;
|
||||||
Server cert, taken from coap_server.crt
|
unsigned int server_crt_bytes = server_crt_end - server_crt_start;
|
||||||
Server key, taken from coap_server.key
|
unsigned int server_key_bytes = server_key_end - server_key_start;
|
||||||
|
coap_dtls_pki_t dtls_pki;
|
||||||
|
|
||||||
The PEM, CRT and KEY file are examples taken from the wpa2 enterprise
|
memset (&dtls_pki, 0, sizeof(dtls_pki));
|
||||||
example.
|
dtls_pki.version = COAP_DTLS_PKI_SETUP_VERSION;
|
||||||
|
if (ca_pem_bytes) {
|
||||||
|
/*
|
||||||
|
* Add in additional certificate checking.
|
||||||
|
* This list of enabled can be tuned for the specific
|
||||||
|
* requirements - see 'man coap_encryption'.
|
||||||
|
*
|
||||||
|
* Note: A list of root ca file can be setup separately using
|
||||||
|
* coap_context_set_pki_root_cas(), but the below is used to
|
||||||
|
* define what checking actually takes place.
|
||||||
|
*/
|
||||||
|
dtls_pki.verify_peer_cert = 1;
|
||||||
|
dtls_pki.require_peer_cert = 1;
|
||||||
|
dtls_pki.allow_self_signed = 1;
|
||||||
|
dtls_pki.allow_expired_certs = 1;
|
||||||
|
dtls_pki.cert_chain_validation = 1;
|
||||||
|
dtls_pki.cert_chain_verify_depth = 2;
|
||||||
|
dtls_pki.check_cert_revocation = 1;
|
||||||
|
dtls_pki.allow_no_crl = 1;
|
||||||
|
dtls_pki.allow_expired_crl = 1;
|
||||||
|
dtls_pki.allow_bad_md_hash = 1;
|
||||||
|
dtls_pki.allow_short_rsa_length = 1;
|
||||||
|
dtls_pki.validate_cn_call_back = verify_cn_callback;
|
||||||
|
dtls_pki.cn_call_back_arg = NULL;
|
||||||
|
dtls_pki.validate_sni_call_back = NULL;
|
||||||
|
dtls_pki.sni_call_back_arg = NULL;
|
||||||
|
}
|
||||||
|
dtls_pki.pki_key.key_type = COAP_PKI_KEY_PEM_BUF;
|
||||||
|
dtls_pki.pki_key.key.pem_buf.public_cert = server_crt_start;
|
||||||
|
dtls_pki.pki_key.key.pem_buf.public_cert_len = server_crt_bytes;
|
||||||
|
dtls_pki.pki_key.key.pem_buf.private_key = server_key_start;
|
||||||
|
dtls_pki.pki_key.key.pem_buf.private_key_len = server_key_bytes;
|
||||||
|
dtls_pki.pki_key.key.pem_buf.ca_cert = ca_pem_start;
|
||||||
|
dtls_pki.pki_key.key.pem_buf.ca_cert_len = ca_pem_bytes;
|
||||||
|
|
||||||
To embed it in the app binary, the PEM, CRT and KEY file is named
|
coap_context_set_pki(ctx, &dtls_pki);
|
||||||
in the component.mk COMPONENT_EMBED_TXTFILES variable.
|
#endif /* CONFIG_COAP_MBEDTLS_PKI */
|
||||||
*/
|
|
||||||
extern uint8_t ca_pem_start[] asm("_binary_coap_ca_pem_start");
|
|
||||||
extern uint8_t ca_pem_end[] asm("_binary_coap_ca_pem_end");
|
|
||||||
extern uint8_t server_crt_start[] asm("_binary_coap_server_crt_start");
|
|
||||||
extern uint8_t server_crt_end[] asm("_binary_coap_server_crt_end");
|
|
||||||
extern uint8_t server_key_start[] asm("_binary_coap_server_key_start");
|
|
||||||
extern uint8_t server_key_end[] asm("_binary_coap_server_key_end");
|
|
||||||
unsigned int ca_pem_bytes = ca_pem_end - ca_pem_start;
|
|
||||||
unsigned int server_crt_bytes = server_crt_end - server_crt_start;
|
|
||||||
unsigned int server_key_bytes = server_key_end - server_key_start;
|
|
||||||
coap_dtls_pki_t dtls_pki;
|
|
||||||
|
|
||||||
memset (&dtls_pki, 0, sizeof(dtls_pki));
|
|
||||||
dtls_pki.version = COAP_DTLS_PKI_SETUP_VERSION;
|
|
||||||
if (ca_pem_bytes) {
|
|
||||||
/*
|
|
||||||
* Add in additional certificate checking.
|
|
||||||
* This list of enabled can be tuned for the specific
|
|
||||||
* requirements - see 'man coap_encryption'.
|
|
||||||
*
|
|
||||||
* Note: A list of root ca file can be setup separately using
|
|
||||||
* coap_context_set_pki_root_cas(), but the below is used to
|
|
||||||
* define what checking actually takes place.
|
|
||||||
*/
|
|
||||||
dtls_pki.verify_peer_cert = 1;
|
|
||||||
dtls_pki.require_peer_cert = 1;
|
|
||||||
dtls_pki.allow_self_signed = 1;
|
|
||||||
dtls_pki.allow_expired_certs = 1;
|
|
||||||
dtls_pki.cert_chain_validation = 1;
|
|
||||||
dtls_pki.cert_chain_verify_depth = 2;
|
|
||||||
dtls_pki.check_cert_revocation = 1;
|
|
||||||
dtls_pki.allow_no_crl = 1;
|
|
||||||
dtls_pki.allow_expired_crl = 1;
|
|
||||||
dtls_pki.allow_bad_md_hash = 1;
|
|
||||||
dtls_pki.allow_short_rsa_length = 1;
|
|
||||||
dtls_pki.validate_cn_call_back = verify_cn_callback;
|
|
||||||
dtls_pki.cn_call_back_arg = NULL;
|
|
||||||
dtls_pki.validate_sni_call_back = NULL;
|
|
||||||
dtls_pki.sni_call_back_arg = NULL;
|
|
||||||
}
|
|
||||||
dtls_pki.pki_key.key_type = COAP_PKI_KEY_PEM_BUF;
|
|
||||||
dtls_pki.pki_key.key.pem_buf.public_cert = server_crt_start;
|
|
||||||
dtls_pki.pki_key.key.pem_buf.public_cert_len = server_crt_bytes;
|
|
||||||
dtls_pki.pki_key.key.pem_buf.private_key = server_key_start;
|
|
||||||
dtls_pki.pki_key.key.pem_buf.private_key_len = server_key_bytes;
|
|
||||||
dtls_pki.pki_key.key.pem_buf.ca_cert = ca_pem_start;
|
|
||||||
dtls_pki.pki_key.key.pem_buf.ca_cert_len = ca_pem_bytes;
|
|
||||||
|
|
||||||
coap_context_set_pki(ctx, &dtls_pki);
|
|
||||||
#endif /* CONFIG_MBEDTLS_COAP_PKI */
|
|
||||||
|
|
||||||
ep = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_UDP);
|
ep = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_UDP);
|
||||||
if (!ep) {
|
if (!ep) {
|
||||||
goto clean_up;
|
ESP_LOGE(TAG, "udp: coap_new_endpoint() failed");
|
||||||
|
goto clean_up;
|
||||||
}
|
}
|
||||||
ep = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_TCP);
|
ep = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_TCP);
|
||||||
if (!ep) {
|
if (!ep) {
|
||||||
goto clean_up;
|
ESP_LOGE(TAG, "tcp: coap_new_endpoint() failed");
|
||||||
|
goto clean_up;
|
||||||
}
|
}
|
||||||
#if defined(CONFIG_MBEDTLS_COAP_PSK) || defined(CONFIG_MBEDTLS_COAP_PKI)
|
#if defined(CONFIG_COAP_MBEDTLS_PSK) || defined(CONFIG_COAP_MBEDTLS_PKI)
|
||||||
if (coap_dtls_is_supported()) {
|
if (coap_dtls_is_supported()) {
|
||||||
serv_addr.addr.sin.sin_port = htons(COAPS_DEFAULT_PORT);
|
serv_addr.addr.sin.sin_port = htons(COAPS_DEFAULT_PORT);
|
||||||
ep = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_DTLS);
|
ep = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_DTLS);
|
||||||
if (!ep) {
|
if (!ep) {
|
||||||
goto clean_up;
|
ESP_LOGE(TAG, "dtls: coap_new_endpoint() failed");
|
||||||
|
goto clean_up;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
#endif /* CONFIG_MBEDTLS_COAP_PSK CONFIG_MBEDTLS_COAP_PKI */
|
#endif /* CONFIG_COAP_MBEDTLS_PSK CONFIG_COAP_MBEDTLS_PKI */
|
||||||
resource = coap_resource_init(coap_make_str_const("Espressif"), 0);
|
resource = coap_resource_init(coap_make_str_const("Espressif"), 0);
|
||||||
if (!resource) {
|
if (!resource) {
|
||||||
goto clean_up;
|
ESP_LOGE(TAG, "coap_resource_init() failed");
|
||||||
|
goto clean_up;
|
||||||
}
|
}
|
||||||
coap_register_handler(resource, COAP_REQUEST_GET, hnd_espressif_get);
|
coap_register_handler(resource, COAP_REQUEST_GET, hnd_espressif_get);
|
||||||
coap_register_handler(resource, COAP_REQUEST_PUT, hnd_espressif_put);
|
coap_register_handler(resource, COAP_REQUEST_PUT, hnd_espressif_put);
|
||||||
|
@ -301,14 +301,6 @@ void app_main(void)
|
||||||
tcpip_adapter_init();
|
tcpip_adapter_init();
|
||||||
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
||||||
|
|
||||||
#if 0
|
|
||||||
/* See https://github.com/Ebiroll/qemu_esp32 for further information */
|
|
||||||
#include "emul_ip.h"
|
|
||||||
if (is_running_qemu()) {
|
|
||||||
xTaskCreate(task_lwip_init, "task_lwip_init", 2*4096, NULL, 20, NULL);
|
|
||||||
}
|
|
||||||
else
|
|
||||||
#endif
|
|
||||||
/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
|
/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
|
||||||
* Read "Establishing Wi-Fi or Ethernet Connection" section in
|
* Read "Establishing Wi-Fi or Ethernet Connection" section in
|
||||||
* examples/protocols/README.md for more information about this function.
|
* examples/protocols/README.md for more information about this function.
|
||||||
|
|
|
@ -5,6 +5,4 @@
|
||||||
|
|
||||||
# embed files from the "certs" directory as binary data symbols
|
# embed files from the "certs" directory as binary data symbols
|
||||||
# in the app
|
# in the app
|
||||||
COMPONENT_EMBED_TXTFILES := coap_ca.pem
|
COMPONENT_EMBED_TXTFILES := certs/coap_ca.pem certs/coap_server.crt certs/coap_server.key
|
||||||
COMPONENT_EMBED_TXTFILES += coap_server.crt
|
|
||||||
COMPONENT_EMBED_TXTFILES += coap_server.key
|
|
||||||
|
|
Loading…
Reference in a new issue