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TencentOS-tiny/components/connectivity/iotkit-embedded-3.0.1/3rdparty/wrappers/tls/HAL_DTLS_mbedtls.c
dcxajichu 8c24d921b0 support aliyun sdk on TencentOS tiny 
sample: examples\aliyun_iotkit_csdk_mqtt
project: board\TencentOS_tiny_EVB_MX_Plus\KEIL\aliyun_iotkit_csdk_mqtt
2019-10-31 16:36:28 +08:00

518 lines
16 KiB
C
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/*
* Copyright (C) 2015-2018 Alibaba Group Holding Limited
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "infra_config.h"
#ifdef COAP_DTLS_SUPPORT
#include "wrappers_defs.h"
#include "mbedtls/ssl.h"
#include "mbedtls/platform.h"
#include "mbedtls/sha256.h"
#include "mbedtls/debug.h"
#include "mbedtls/timing.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/entropy.h"
#include "mbedtls/ssl_cookie.h"
#include "mbedtls/net_sockets.h"
void *HAL_Malloc(uint32_t size);
void HAL_Free(void *ptr);
void HAL_Printf(const char *fmt, ...);
#define DTLS_TRC(...) HAL_Printf("[trc] "), HAL_Printf(__VA_ARGS__)
#define DTLS_DUMP(...) HAL_Printf("[dump] "), HAL_Printf(__VA_ARGS__)
#define DTLS_DEBUG(...) HAL_Printf("[dbg] "), HAL_Printf(__VA_ARGS__)
#define DTLS_INFO(...) HAL_Printf("[inf] "), HAL_Printf(__VA_ARGS__)
#define DTLS_ERR(...) HAL_Printf("[err] "), HAL_Printf(__VA_ARGS__)
#ifdef DTLS_SESSION_SAVE
mbedtls_ssl_session *saved_session = NULL;
#endif
typedef struct {
mbedtls_ssl_context context;
mbedtls_ssl_config conf;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_entropy_context entropy;
#ifdef MBEDTLS_X509_CRT_PARSE_C
mbedtls_x509_crt cacert;
#endif
mbedtls_net_context fd;
mbedtls_timing_delay_context timer;
mbedtls_ssl_cookie_ctx cookie_ctx;
} dtls_session_t;
#define MBEDTLS_MEM_TEST 1
#ifdef MBEDTLS_MEM_TEST
#define MBEDTLS_MEM_INFO_MAGIC 0x12345678
static unsigned int mbedtls_mem_used = 0;
static unsigned int mbedtls_max_mem_used = 0;
static dtls_hooks_t g_dtls_hooks = {HAL_Malloc, HAL_Free};
typedef struct {
int magic;
int size;
} mbedtls_mem_info_t;
void *_DTLSCalloc_wrapper(size_t n, size_t size)
{
void *buf = NULL;
mbedtls_mem_info_t *mem_info = NULL;
if (n == 0 || size == 0) {
return NULL;
}
buf = g_dtls_hooks.malloc(n * size + sizeof(mbedtls_mem_info_t));
if (NULL == buf) {
return NULL;
} else {
memset(buf, 0, n * size + sizeof(mbedtls_mem_info_t));
}
mem_info = (mbedtls_mem_info_t *)buf;
mem_info->magic = MBEDTLS_MEM_INFO_MAGIC;
mem_info->size = n * size;
buf += sizeof(mbedtls_mem_info_t);
mbedtls_mem_used += mem_info->size;
if (mbedtls_mem_used > mbedtls_max_mem_used) {
mbedtls_max_mem_used = mbedtls_mem_used;
}
/* DTLS_TRC("INFO -- mbedtls malloc: %p %d total used: %d max used: %d\r\n",
buf, (int)size, mbedtls_mem_used, mbedtls_max_mem_used); */
return buf;
}
void _DTLSFree_wrapper(void *ptr)
{
mbedtls_mem_info_t *mem_info = NULL;
if (NULL == ptr) {
return;
}
mem_info = ptr - sizeof(mbedtls_mem_info_t);
if (mem_info->magic != MBEDTLS_MEM_INFO_MAGIC) {
DTLS_TRC("Warning - invalid mem info magic: 0x%x\r\n", mem_info->magic);
return;
}
mbedtls_mem_used -= mem_info->size;
/* DTLS_TRC("INFO mbedtls free: %p %d total used: %d max used: %d\r\n",
ptr, mem_info->size, mbedtls_mem_used, mbedtls_max_mem_used);*/
g_dtls_hooks.free(mem_info);
}
#else
static void *_DTLSCalloc_wrapper(size_t n, size_t s)
{
void *ptr = NULL;
size_t len = n * s;
ptr = HAL_Malloc(len);
if (NULL != ptr) {
memset(ptr, 0x00, len);
}
return ptr;
}
static void _DTLSFree_wrapper(void *ptr)
{
if (NULL != ptr) {
HAL_Free(ptr);
ptr = NULL;
}
}
#endif
#ifdef DTLS_SESSION_SAVE
static int _DTLSSession_save(const mbedtls_ssl_session *session,
unsigned char *buf, size_t buf_len,
size_t *olen)
{
unsigned char *p = buf;
size_t left = buf_len;
#if defined(MBEDTLS_X509_CRT_PARSE_C)
size_t cert_len;
#endif /* MBEDTLS_X509_CRT_PARSE_C */
if (left < sizeof(mbedtls_ssl_session)) {
return (MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL);
}
memcpy(p, session, sizeof(mbedtls_ssl_session));
p += sizeof(mbedtls_ssl_session);
left -= sizeof(mbedtls_ssl_session);
#if defined(MBEDTLS_X509_CRT_PARSE_C)
if (session->peer_cert == NULL) {
cert_len = 0;
} else {
cert_len = session->peer_cert->raw.len;
}
if (left < 3 + cert_len) {
return (MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL);
}
*p++ = (unsigned char)(cert_len >> 16 & 0xFF);
*p++ = (unsigned char)(cert_len >> 8 & 0xFF);
*p++ = (unsigned char)(cert_len & 0xFF);
if (session->peer_cert != NULL) {
memcpy(p, session->peer_cert->raw.p, cert_len);
}
p += cert_len;
#endif /* MBEDTLS_X509_CRT_PARSE_C */
*olen = p - buf;
return (0);
}
#endif
static unsigned int _DTLSVerifyOptions_set(dtls_session_t *p_dtls_session, unsigned char *p_ca_cert_pem, char *host)
{
int result;
unsigned int err_code = DTLS_SUCCESS;
#ifdef MBEDTLS_X509_CRT_PARSE_C
if (p_ca_cert_pem != NULL) {
mbedtls_ssl_conf_authmode(&p_dtls_session->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
if (strstr(host, "pre.iot-as-coap")) {
DTLS_TRC("host = '%s' so verify server OPTIONAL\r\n", host);
mbedtls_ssl_conf_authmode(&p_dtls_session->conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
}
DTLS_TRC("Call mbedtls_ssl_conf_authmode\r\n");
DTLS_TRC("x509 ca cert pem len %d\r\n%s\r\n", (int)strlen((char *)p_ca_cert_pem) + 1, p_ca_cert_pem);
result = mbedtls_x509_crt_parse(&p_dtls_session->cacert,
p_ca_cert_pem,
strlen((const char *)p_ca_cert_pem) + 1);
DTLS_TRC("mbedtls_x509_crt_parse result 0x%04x\r\n", result);
if (0 != result) {
err_code = DTLS_INVALID_CA_CERTIFICATE;
} else {
mbedtls_ssl_conf_ca_chain(&p_dtls_session->conf, &p_dtls_session->cacert, NULL);
}
} else
#endif
{
mbedtls_ssl_conf_authmode(&p_dtls_session->conf, MBEDTLS_SSL_VERIFY_NONE);
}
return err_code;
}
static void _DTLSLog_wrapper(void *p_ctx, int level,
const char *p_file, int line, const char *p_str)
{
DTLS_INFO("[mbedTLS]:[%s]:[%d]: %s\r\n", p_file, line, p_str);
}
static unsigned int _DTLSContext_setup(dtls_session_t *p_dtls_session, coap_dtls_options_t *p_options)
{
int result = 0;
mbedtls_ssl_init(&p_dtls_session->context);
result = mbedtls_ssl_setup(&p_dtls_session->context, &p_dtls_session->conf);
DTLS_TRC("mbedtls_ssl_setup result 0x%04x\r\n", result);
if (result == 0) {
if (p_dtls_session->conf.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM) {
mbedtls_ssl_set_timer_cb(&p_dtls_session->context,
(void *)&p_dtls_session->timer,
mbedtls_timing_set_delay,
mbedtls_timing_get_delay);
}
#ifdef MBEDTLS_X509_CRT_PARSE_C
DTLS_TRC("mbedtls_ssl_set_hostname %s\r\n", p_options->p_host);
mbedtls_ssl_set_hostname(&p_dtls_session->context, p_options->p_host);
#endif
mbedtls_ssl_set_bio(&p_dtls_session->context,
(void *)&p_dtls_session->fd,
mbedtls_net_send,
mbedtls_net_recv,
mbedtls_net_recv_timeout);
DTLS_TRC("mbedtls_ssl_set_bio result 0x%04x\r\n", result);
#ifdef DTLS_SESSION_SAVE
if (NULL != saved_session) {
result = mbedtls_ssl_set_session(&p_dtls_session->context, saved_session);
DTLS_TRC("mbedtls_ssl_set_session return 0x%04x\r\n", result);
}
#endif
do {
result = mbedtls_ssl_handshake(&p_dtls_session->context);
} while (result == MBEDTLS_ERR_SSL_WANT_READ ||
result == MBEDTLS_ERR_SSL_WANT_WRITE);
DTLS_TRC("mbedtls_ssl_handshake result 0x%04x\r\n", result);
#ifdef MBEDTLS_MEM_TEST
DTLS_TRC("mbedtls handshake memory total used: %d max used: %d\r\n",
mbedtls_mem_used, mbedtls_max_mem_used);
#endif
#ifdef DTLS_SESSION_SAVE
if (0 == result) {
if (NULL == saved_session) {
saved_session = HAL_Malloc(sizeof(mbedtls_ssl_session));
}
if (NULL != saved_session) {
memset(saved_session, 0x00, sizeof(mbedtls_ssl_session));
result = mbedtls_ssl_get_session(&p_dtls_session->context, saved_session);
DTLS_TRC("mbedtls_ssl_get_session return 0x%04x\r\n", result);
}
}
#endif
}
return (result ? DTLS_HANDSHAKE_FAILED : DTLS_SUCCESS);
}
dtls_session_t *_DTLSSession_init()
{
dtls_session_t *p_dtls_session = NULL;
p_dtls_session = HAL_Malloc(sizeof(dtls_session_t));
mbedtls_debug_set_threshold(0);
#ifdef MBEDTLS_MEM_TEST
mbedtls_mem_used = 0;
mbedtls_max_mem_used = 0;
#endif
mbedtls_platform_set_calloc_free(_DTLSCalloc_wrapper, _DTLSFree_wrapper);
if (NULL != p_dtls_session) {
mbedtls_net_init(&p_dtls_session->fd);
mbedtls_ssl_init(&p_dtls_session->context);
mbedtls_ssl_config_init(&p_dtls_session->conf);
mbedtls_net_init(&p_dtls_session->fd);
mbedtls_ssl_cookie_init(&p_dtls_session->cookie_ctx);
#ifdef MBEDTLS_X509_CRT_PARSE_C
mbedtls_x509_crt_init(&p_dtls_session->cacert);
#endif
mbedtls_ctr_drbg_init(&p_dtls_session->ctr_drbg);
mbedtls_entropy_init(&p_dtls_session->entropy);
DTLS_INFO("HAL_DTLSSession_init success\r\n");
}
return p_dtls_session;
}
unsigned int _DTLSSession_deinit(dtls_session_t *p_dtls_session)
{
int ret;
if (p_dtls_session != NULL) {
do {
ret = mbedtls_ssl_close_notify(&p_dtls_session->context);
} while (ret == MBEDTLS_ERR_SSL_WANT_WRITE);
mbedtls_net_free(&p_dtls_session->fd);
#ifdef MBEDTLS_X509_CRT_PARSE_C
mbedtls_x509_crt_free(&p_dtls_session->cacert);
#endif
mbedtls_ssl_cookie_free(&p_dtls_session->cookie_ctx);
mbedtls_ssl_config_free(&p_dtls_session->conf);
mbedtls_ssl_free(&p_dtls_session->context);
mbedtls_ctr_drbg_free(&p_dtls_session->ctr_drbg);
mbedtls_entropy_free(&p_dtls_session->entropy);
HAL_Free(p_dtls_session);
}
return DTLS_SUCCESS;
}
int HAL_DTLSHooks_set(dtls_hooks_t *hooks)
{
if (hooks == NULL || hooks->malloc == NULL || hooks->free == NULL) {
return DTLS_INVALID_PARAM;
}
g_dtls_hooks.malloc = hooks->malloc;
g_dtls_hooks.free = hooks->free;
return DTLS_SUCCESS;
}
DTLSContext *HAL_DTLSSession_create(coap_dtls_options_t *p_options)
{
char port[6] = {0};
int result = 0;
dtls_session_t *p_dtls_session = NULL;
p_dtls_session = _DTLSSession_init();
if (NULL != p_dtls_session) {
mbedtls_ssl_config_init(&p_dtls_session->conf);
result = mbedtls_ctr_drbg_seed(&p_dtls_session->ctr_drbg, mbedtls_entropy_func, &p_dtls_session->entropy,
(const unsigned char *)"IoTx",
strlen("IoTx"));
if (0 != result) {
DTLS_ERR("mbedtls_ctr_drbg_seed result 0x%04x\r\n", result);
goto error;
}
result = mbedtls_ssl_config_defaults(&p_dtls_session->conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_DATAGRAM,
MBEDTLS_SSL_PRESET_DEFAULT);
if (0 != result) {
DTLS_ERR("mbedtls_ssl_config_defaults result 0x%04x\r\n", result);
goto error;
}
mbedtls_ssl_conf_rng(&p_dtls_session->conf, mbedtls_ctr_drbg_random, &p_dtls_session->ctr_drbg);
mbedtls_ssl_conf_dbg(&p_dtls_session->conf, _DTLSLog_wrapper, NULL);
result = mbedtls_ssl_cookie_setup(&p_dtls_session->cookie_ctx,
mbedtls_ctr_drbg_random, &p_dtls_session->ctr_drbg);
if (0 != result) {
DTLS_ERR("mbedtls_ssl_cookie_setup result 0x%04x\r\n", result);
goto error;
}
#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
mbedtls_ssl_conf_dtls_cookies(&p_dtls_session->conf, mbedtls_ssl_cookie_write,
mbedtls_ssl_cookie_check, &p_dtls_session->cookie_ctx);
#endif
result = _DTLSVerifyOptions_set(p_dtls_session, p_options->p_ca_cert_pem, p_options->p_host);
if (DTLS_SUCCESS != result) {
DTLS_ERR("DTLSVerifyOptions_set result 0x%04x\r\n", result);
goto error;
}
sprintf(port, "%u", p_options->port);
result = mbedtls_net_connect(&p_dtls_session->fd, p_options->p_host,
port, MBEDTLS_NET_PROTO_UDP);
if (0 != result) {
DTLS_ERR("mbedtls_net_connect result 0x%04x\r\n", result);
goto error;
}
#ifdef MBEDTLS_SSL_PROTO_DTLS
if (p_dtls_session->conf.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM) {
mbedtls_ssl_conf_min_version(&p_dtls_session->conf,
MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_3);
mbedtls_ssl_conf_max_version(&p_dtls_session->conf,
MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_3);
mbedtls_ssl_conf_handshake_timeout(&p_dtls_session->conf,
(MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN * 2),
(MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN * 2 * 4));
}
#endif
result = _DTLSContext_setup(p_dtls_session, p_options);
if (DTLS_SUCCESS != result) {
DTLS_ERR("DTLSVerifyOptions_set result 0x%04x\r\n", result);
goto error;
}
return (DTLSContext *)p_dtls_session;
}
error:
if (NULL != p_dtls_session) {
_DTLSSession_deinit(p_dtls_session);
}
return NULL;
}
unsigned int HAL_DTLSSession_write(DTLSContext *context,
const unsigned char *p_data,
unsigned int *p_datalen)
{
int len = 0;
unsigned int err_code = DTLS_SUCCESS;
dtls_session_t *p_dtls_session = (dtls_session_t *)context;
if (NULL != p_dtls_session && NULL != p_data && p_datalen != NULL) {
len = (*p_datalen);
len = mbedtls_ssl_write(&p_dtls_session->context, p_data, len);
if (len < 0) {
if (len == MBEDTLS_ERR_SSL_CONN_EOF) {
if (p_dtls_session->context.state < MBEDTLS_SSL_HANDSHAKE_OVER) {
err_code = DTLS_HANDSHAKE_IN_PROGRESS;
}
}
} else {
(*p_datalen) = len;
err_code = DTLS_SUCCESS;
}
}
return err_code;
}
unsigned int HAL_DTLSSession_read(DTLSContext *context,
unsigned char *p_data,
unsigned int *p_datalen,
unsigned int timeout)
{
int len = 0;
unsigned int err_code = DTLS_READ_DATA_FAILED;
dtls_session_t *p_dtls_session = (dtls_session_t *)context;
if (NULL != p_dtls_session && NULL != p_data && p_datalen != NULL) {
mbedtls_ssl_conf_read_timeout(&(p_dtls_session->conf), timeout);
len = mbedtls_ssl_read(&p_dtls_session->context, p_data, *p_datalen);
if (0 < len) {
*p_datalen = len;
err_code = DTLS_SUCCESS;
DTLS_TRC("mbedtls_ssl_read len %d bytes\r\n", len);
} else {
*p_datalen = 0;
if (MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE == len) {
err_code = DTLS_FATAL_ALERT_MESSAGE;
DTLS_INFO("Recv peer fatal alert message\r\n");
} else if (MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY == len) {
err_code = DTLS_PEER_CLOSE_NOTIFY;
DTLS_INFO("The DTLS session was closed by peer\r\n");
} else if (MBEDTLS_ERR_SSL_TIMEOUT == len) {
err_code = DTLS_SUCCESS;
DTLS_TRC("DTLS recv timeout\r\n");
} else {
DTLS_TRC("mbedtls_ssl_read error result (-0x%04x)\r\n", len);
}
}
}
return err_code;
}
unsigned int HAL_DTLSSession_free(DTLSContext *context)
{
dtls_session_t *p_dtls_session = NULL;
if (NULL != context) {
p_dtls_session = (dtls_session_t *)context;
return _DTLSSession_deinit(p_dtls_session);
}
return DTLS_INVALID_PARAM;
}
#endif
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