static int tls_server_accept(void)
{
int ret;
mbedtls_net_context client;
mbedtls_net_init(&client);
ret = mbedtls_net_accept(&stls.fd, &client, NULL, 0, NULL);
if (ret || ccnt >= MAXCLIENTS) {
printf("max clients\n");
goto err;
}
struct client *c = ctls + ccnt;
c->fd = client;
mbedtls_ssl_init(&c->ssl);
ret = mbedtls_ssl_setup(&c->ssl, &stls.conf);
if (ret) {
printf("cannot setup the ssl session\n");
goto err;
}
mbedtls_ssl_set_bio(&c->ssl, &c->fd, mbedtls_net_send, mbedtls_net_recv, NULL);
c->handler = tls_client_handshake;
ccnt++;
return 0;
err:
mbedtls_net_free(&client);
return -1;
}
int websocket_connect(websocket_t *client, char *host, const char *port)
{
int r;
int tls_hs_retry = WEBSOCKET_MAX_TLS_HANDSHAKE;
TLS_HS_RETRY:
if ((r = connect_socket(client, host, port)) != WEBSOCKET_SUCCESS) {
return r;
}
if (websocket_config_socket(client->fd) != WEBSOCKET_SUCCESS) {
WEBSOCKET_CLOSE(client->fd);
return WEBSOCKET_SOCKET_ERROR;
}
if (client->tls_enabled) {
if ((r = websocket_tls_handshake(client, host, client->auth_mode)) != WEBSOCKET_SUCCESS) {
if (r == MBEDTLS_ERR_NET_SEND_FAILED || r == MBEDTLS_ERR_NET_RECV_FAILED || r == MBEDTLS_ERR_SSL_CONN_EOF) {
if (tls_hs_retry-- > 0) {
WEBSOCKET_DEBUG("Handshake again.... \n");
mbedtls_net_free(&(client->tls_net));
mbedtls_ssl_free(client->tls_ssl);
mbedtls_ssl_init(client->tls_ssl);
goto TLS_HS_RETRY;
}
}
return WEBSOCKET_TLS_HANDSHAKE_ERROR;
}
}
return r;
}
static void ssl_free( SSLExt* ext )
{
mbedtls_net_free( &ext->nc );
mbedtls_ssl_free( &ext->sc );
mbedtls_ssl_config_free( &ext->conf );
mbedtls_ctr_drbg_free( &ext->ctr_drbg );
mbedtls_entropy_free( &ext->entropy );
}
static void session_free(EV_P_ session_context *sc) {
log_debug("session_free - sc=%x", sc);
ev_io_stop(EV_A_ & sc->backend_rd_watcher);
ev_io_stop(EV_A_ & sc->backend_wr_watcher);
ev_io_stop(EV_A_ & sc->client_rd_watcher);
ev_io_stop(EV_A_ & sc->client_wr_watcher);
ev_timer_stop(EV_A_ & sc->inactivity_timer);
mbedtls_net_free(&sc->backend_fd);
mbedtls_net_free(&sc->client_fd);
mbedtls_ssl_free(&sc->ssl);
LL_PURGE(sc->from_client);
LL_PURGE(sc->from_backend);
log_info("(%s:%d) Session closed", sc->client_ip_str, sc->client_port);
free(sc);
}
static void tls_server_free(struct server *s)
{
mbedtls_net_free(&s->fd);
mbedtls_pk_free(&s->pkey);
mbedtls_x509_crt_free(&s->srvcert);
mbedtls_x509_crt_free(&s->cacert);
mbedtls_ssl_config_free(&s->conf);
mbedtls_ctr_drbg_free(&s->ctr_drbg);
mbedtls_entropy_free(&s->entropy);
}
static
void broker_server_new_client(uv_poll_t *poll,
int status, int events) {
(void) status;
(void) events;
Server *server = poll->data;
Client *client = dslink_calloc(1, sizeof(Client));
if (!client) {
goto fail;
}
client->server = server;
client->sock = dslink_socket_init(0);
if (!client->sock) {
dslink_free(client);
goto fail;
}
if (mbedtls_net_accept(&server->srv, &client->sock->socket_ctx,
NULL, 0, NULL) != 0) {
log_warn("Failed to accept a client connection\n");
goto fail_poll_setup;
}
uv_poll_t *clientPoll = dslink_malloc(sizeof(uv_poll_t));
if (!clientPoll) {
goto fail_poll_setup;
}
uv_loop_t *loop = poll->loop;
if (uv_poll_init(loop, clientPoll,
client->sock->socket_ctx.fd) != 0) {
dslink_free(clientPoll);
goto fail_poll_setup;
}
clientPoll->data = client;
client->poll = clientPoll;
uv_poll_start(clientPoll, UV_READABLE, broker_server_client_ready);
log_debug("Accepted a client connection\n");
return;
fail:
{
mbedtls_net_context tmp;
mbedtls_net_init(&tmp);
mbedtls_net_accept(&server->srv, &tmp, NULL, 0, NULL);
mbedtls_net_free(&tmp);
}
return;
fail_poll_setup:
dslink_socket_free(client->sock);
dslink_free(client);
}
int ssl_destroy(SSLConnection* conn) {
mbedtls_net_free(&conn->net_ctx);
mbedtls_ssl_free(&conn->ssl_ctx);
mbedtls_ssl_config_free(&conn->ssl_conf);
mbedtls_ctr_drbg_free(&conn->drbg_ctx);
mbedtls_entropy_free(&conn->entropy_ctx);
mbedtls_x509_crt_free(&conn->ca_cert);
mbedtls_x509_crt_free(&conn->client_cert);
mbedtls_pk_free(&conn->client_key);
return 0;
}
/*
* if websocket server is initiated from http(s), you just can call this function.
* see the comment of websocket_server_open to know what is different.
*/
websocket_return_t websocket_server_init(websocket_t *server)
{
int r = WEBSOCKET_SUCCESS;
struct websocket_info_t *socket_data = NULL;
if (server == NULL) {
WEBSOCKET_DEBUG("NULL parameter\n");
return WEBSOCKET_ALLOCATION_ERROR;
}
socket_data = calloc(1, sizeof(struct websocket_info_t));
if (socket_data == NULL) {
WEBSOCKET_DEBUG("fail to allocate memory\n");
r = WEBSOCKET_ALLOCATION_ERROR;
goto EXIT_SERVER_INIT;
}
socket_data->data = server;
if (wslay_event_context_server_init(&(server->ctx), server->cb, socket_data) != WEBSOCKET_SUCCESS) {
WEBSOCKET_DEBUG("fail to initiate websocket server\n");
r = WEBSOCKET_INIT_ERROR;
goto EXIT_SERVER_INIT;
}
if (websocket_config_socket(server->fd) != WEBSOCKET_SUCCESS) {
r = WEBSOCKET_SOCKET_ERROR;
goto EXIT_SERVER_INIT;
}
WEBSOCKET_DEBUG("start websocket server handling loop\n");
r = websocket_handler(server);
EXIT_SERVER_INIT:
WEBSOCKET_CLOSE(server->fd);
if (server->ctx) {
wslay_event_context_free(server->ctx);
server->ctx = NULL;
}
if (server->tls_enabled) {
mbedtls_net_free(&(server->tls_net));
mbedtls_ssl_free(server->tls_ssl);
WEBSOCKET_FREE(server->tls_ssl);
}
websocket_update_state(server, WEBSOCKET_STOP);
return r;
}
int iot_tls_destroy(Network *pNetwork) {
mbedtls_net_free(&server_fd);
mbedtls_x509_crt_free(&clicert);
mbedtls_x509_crt_free(&cacert);
mbedtls_pk_free(&pkey);
mbedtls_ssl_free(&ssl);
mbedtls_ssl_config_free(&conf);
mbedtls_ctr_drbg_free(&ctr_drbg);
mbedtls_entropy_free(&entropy);
return 0;
}
IoT_Error_t iot_tls_destroy(Network *pNetwork) {
TLSDataParams *tlsDataParams = &(pNetwork->tlsDataParams);
mbedtls_net_free(&(tlsDataParams->server_fd));
mbedtls_x509_crt_free(&(tlsDataParams->clicert));
mbedtls_x509_crt_free(&(tlsDataParams->cacert));
mbedtls_pk_free(&(tlsDataParams->pkey));
mbedtls_ssl_free(&(tlsDataParams->ssl));
mbedtls_ssl_config_free(&(tlsDataParams->conf));
mbedtls_ctr_drbg_free(&(tlsDataParams->ctr_drbg));
mbedtls_entropy_free(&(tlsDataParams->entropy));
return SUCCESS;
}
// 接続をクローズします。
// 未接続や未初期化の状態で呼んでも副作用はありません。
int
mtls_close(mtlsctx_t* ctx)
{
TRACE("called\n");
if (ctx->initialized) {
if (ctx->usessl) {
mbedtls_ssl_close_notify(&ctx->ssl);
}
// mbedtls_net_free() という名前だが実は close。
mbedtls_net_free(&ctx->net);
}
return 0;
}
static int global_deinit(global_context *gc) {
int ret = 0;
mbedtls_net_free(&gc->listen_fd);
mbedtls_x509_crt_free(&gc->cacert);
mbedtls_ssl_config_free(&gc->conf);
mbedtls_ssl_cookie_free(&gc->cookie_ctx);
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_free(&gc->cache);
#endif
mbedtls_ctr_drbg_free(&gc->ctr_drbg);
mbedtls_entropy_free(&gc->entropy);
return ret == 0 ? 0 : 1;
}
static void mbedtls_cleanup(esp_tls_t *tls)
{
if (!tls) {
return;
}
if (tls->cacert_ptr != global_cacert) {
mbedtls_x509_crt_free(tls->cacert_ptr);
}
tls->cacert_ptr = NULL;
mbedtls_x509_crt_free(&tls->cacert);
mbedtls_x509_crt_free(&tls->clientcert);
mbedtls_pk_free(&tls->clientkey);
mbedtls_entropy_free(&tls->entropy);
mbedtls_ssl_config_free(&tls->conf);
mbedtls_ctr_drbg_free(&tls->ctr_drbg);
mbedtls_ssl_free(&tls->ssl);
mbedtls_net_free(&tls->server_fd);
}
int websocket_server_authenticate(websocket_t *server)
{
int r;
if (server->tls_enabled) {
server->tls_ssl = malloc(sizeof(mbedtls_ssl_context));
if (server->tls_ssl == NULL) {
WEBSOCKET_DEBUG("fail to allocate memory for server\n");
r = WEBSOCKET_ALLOCATION_ERROR;
goto EXIT_SERVER_START;
}
mbedtls_ssl_init(server->tls_ssl);
mbedtls_net_init(&(server->tls_net));
if ((r = websocket_tls_handshake(server, NULL, server->auth_mode)) != WEBSOCKET_SUCCESS) {
WEBSOCKET_DEBUG("fail to tls handshake\n");
r = WEBSOCKET_TLS_HANDSHAKE_ERROR;
goto EXIT_SERVER_START;
}
}
if (websocket_server_handshake(server) != WEBSOCKET_SUCCESS) {
WEBSOCKET_DEBUG("fail to handshake\n");
r = WEBSOCKET_HANDSHAKE_ERROR;
goto EXIT_SERVER_START;
}
return websocket_server_init(server);
EXIT_SERVER_START:
WEBSOCKET_CLOSE(server->fd);
if (server->tls_enabled) {
mbedtls_ssl_free(server->tls_ssl);
mbedtls_net_free(&(server->tls_net));
WEBSOCKET_FREE(server->tls_ssl);
}
websocket_update_state(server, WEBSOCKET_STOP);
return r;
}
void dslink_socket_close(Socket *sock) {
if (!sock) {
return;
}
if (sock->secure) {
SslSocket *s = (SslSocket *) sock;
mbedtls_ssl_close_notify(s->ssl);
mbedtls_entropy_free(s->entropy);
mbedtls_ctr_drbg_free(s->drbg);
mbedtls_ssl_free(s->ssl);
mbedtls_ssl_config_free(s->conf);
free(s->entropy);
free(s->drbg);
free(s->ssl);
free(s->conf);
}
mbedtls_net_free(sock->socket_fd);
free(sock->socket_fd);
free(sock);
}
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);
coap_free(p_dtls_session);
}
return DTLS_SUCCESS;
}
void http_get_task(void *pvParameters)
{
int successes = 0, failures = 0, ret;
printf("HTTP get task starting...\n");
uint32_t flags;
unsigned char buf[1024];
const char *pers = "ssl_client1";
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_x509_crt cacert;
mbedtls_ssl_config conf;
mbedtls_net_context server_fd;
/*
* 0. Initialize the RNG and the session data
*/
mbedtls_ssl_init(&ssl);
mbedtls_x509_crt_init(&cacert);
mbedtls_ctr_drbg_init(&ctr_drbg);
printf("\n . Seeding the random number generator...");
mbedtls_ssl_config_init(&conf);
mbedtls_entropy_init(&entropy);
if((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen(pers))) != 0)
{
printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret);
abort();
}
printf(" ok\n");
/*
* 0. Initialize certificates
*/
printf(" . Loading the CA root certificate ...");
ret = mbedtls_x509_crt_parse(&cacert, (uint8_t*)server_root_cert, strlen(server_root_cert)+1);
if(ret < 0)
{
printf(" failed\n ! mbedtls_x509_crt_parse returned -0x%x\n\n", -ret);
abort();
}
printf(" ok (%d skipped)\n", ret);
/* Hostname set here should match CN in server certificate */
if((ret = mbedtls_ssl_set_hostname(&ssl, WEB_SERVER)) != 0)
{
printf(" failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret);
abort();
}
/*
* 2. Setup stuff
*/
printf(" . Setting up the SSL/TLS structure...");
if((ret = mbedtls_ssl_config_defaults(&conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT)) != 0)
{
printf(" failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret);
goto exit;
}
printf(" ok\n");
/* OPTIONAL is not optimal for security, in this example it will print
a warning if CA verification fails but it will continue to connect.
*/
mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
#ifdef MBEDTLS_DEBUG_C
mbedtls_debug_set_threshold(DEBUG_LEVEL);
mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
#endif
if((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0)
{
printf(" failed\n ! mbedtls_ssl_setup returned %d\n\n", ret);
goto exit;
}
/* Wait until we can resolve the DNS for the server, as an indication
our network is probably working...
*/
printf("Waiting for server DNS to resolve... ");
err_t dns_err;
ip_addr_t host_ip;
do {
vTaskDelay(500 / portTICK_PERIOD_MS);
dns_err = netconn_gethostbyname(WEB_SERVER, &host_ip);
} while(dns_err != ERR_OK);
printf("done.\n");
while(1) {
mbedtls_net_init(&server_fd);
printf("top of loop, free heap = %u\n", xPortGetFreeHeapSize());
/*
* 1. Start the connection
*/
printf(" . Connecting to %s:%s...", WEB_SERVER, WEB_PORT);
if((ret = mbedtls_net_connect(&server_fd, WEB_SERVER,
WEB_PORT, MBEDTLS_NET_PROTO_TCP)) != 0)
{
printf(" failed\n ! mbedtls_net_connect returned %d\n\n", ret);
goto exit;
}
printf(" ok\n");
mbedtls_ssl_set_bio(&ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL);
/*
* 4. Handshake
*/
printf(" . Performing the SSL/TLS handshake...");
while((ret = mbedtls_ssl_handshake(&ssl)) != 0)
{
if(ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE)
{
printf(" failed\n ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret);
goto exit;
}
}
printf(" ok\n");
/*
* 5. Verify the server certificate
*/
printf(" . Verifying peer X.509 certificate...");
/* In real life, we probably want to bail out when ret != 0 */
if((flags = mbedtls_ssl_get_verify_result(&ssl)) != 0)
{
char vrfy_buf[512];
printf(" failed\n");
mbedtls_x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), " ! ", flags);
printf("%s\n", vrfy_buf);
}
else
printf(" ok\n");
/*
* 3. Write the GET request
*/
printf(" > Write to server:");
int len = sprintf((char *) buf, GET_REQUEST);
while((ret = mbedtls_ssl_write(&ssl, buf, len)) <= 0)
{
if(ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE)
{
printf(" failed\n ! mbedtls_ssl_write returned %d\n\n", ret);
goto exit;
}
}
len = ret;
printf(" %d bytes written\n\n%s", len, (char *) buf);
/*
* 7. Read the HTTP response
*/
printf(" < Read from server:");
do
{
len = sizeof(buf) - 1;
memset(buf, 0, sizeof(buf));
ret = mbedtls_ssl_read(&ssl, buf, len);
if(ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE)
continue;
if(ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) {
ret = 0;
break;
}
if(ret < 0)
{
printf("failed\n ! mbedtls_ssl_read returned %d\n\n", ret);
break;
}
if(ret == 0)
{
printf("\n\nEOF\n\n");
break;
}
len = ret;
printf(" %d bytes read\n\n%s", len, (char *) buf);
} while(1);
mbedtls_ssl_close_notify(&ssl);
exit:
mbedtls_ssl_session_reset(&ssl);
mbedtls_net_free(&server_fd);
if(ret != 0)
{
char error_buf[100];
mbedtls_strerror(ret, error_buf, 100);
printf("\n\nLast error was: %d - %s\n\n", ret, error_buf);
failures++;
} else {
successes++;
}
printf("\n\nsuccesses = %d failures = %d\n", successes, failures);
for(int countdown = successes ? 10 : 5; countdown >= 0; countdown--) {
printf("%d... ", countdown);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
printf("\nStarting again!\n");
}
}
int main( void )
{
int ret = exit_ok;
mbedtls_net_context server_fd;
struct sockaddr_in addr;
#if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedtls_x509_crt ca;
#endif
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_ctr_drbg_init( &ctr_drbg );
/*
* 0. Initialize and setup stuff
*/
mbedtls_net_init( &server_fd );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedtls_x509_crt_init( &ca );
#endif
mbedtls_entropy_init( &entropy );
if( mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers, strlen( pers ) ) != 0 )
{
ret = ctr_drbg_seed_failed;
goto exit;
}
if( mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) != 0 )
{
ret = ssl_config_defaults_failed;
goto exit;
}
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
mbedtls_ssl_conf_psk( &conf, psk, sizeof( psk ),
(const unsigned char *) psk_id, sizeof( psk_id ) - 1 );
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
if( mbedtls_x509_crt_parse_der( &ca, ca_cert, sizeof( ca_cert ) ) != 0 )
{
ret = x509_crt_parse_failed;
goto exit;
}
mbedtls_ssl_conf_ca_chain( &conf, &ca, NULL );
mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_REQUIRED );
#endif
if( mbedtls_ssl_setup( &ssl, &conf ) != 0 )
{
ret = ssl_setup_failed;
goto exit;
}
#if defined(MBEDTLS_X509_CRT_PARSE_C)
if( mbedtls_ssl_set_hostname( &ssl, HOSTNAME ) != 0 )
{
ret = hostname_failed;
goto exit;
}
#endif
/*
* 1. Start the connection
*/
memset( &addr, 0, sizeof( addr ) );
addr.sin_family = AF_INET;
ret = 1; /* for endianness detection */
addr.sin_port = *((char *) &ret) == ret ? PORT_LE : PORT_BE;
addr.sin_addr.s_addr = *((char *) &ret) == ret ? ADDR_LE : ADDR_BE;
ret = 0;
if( ( server_fd.fd = socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
{
ret = socket_failed;
goto exit;
}
if( connect( server_fd.fd,
(const struct sockaddr *) &addr, sizeof( addr ) ) < 0 )
{
ret = connect_failed;
goto exit;
}
mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
if( mbedtls_ssl_handshake( &ssl ) != 0 )
{
ret = ssl_handshake_failed;
goto exit;
}
/*
* 2. Write the GET request and close the connection
*/
if( mbedtls_ssl_write( &ssl, (const unsigned char *) GET_REQUEST,
sizeof( GET_REQUEST ) - 1 ) <= 0 )
{
ret = ssl_write_failed;
goto exit;
}
mbedtls_ssl_close_notify( &ssl );
exit:
mbedtls_net_free( &server_fd );
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedtls_x509_crt_free( &ca );
#endif
return( ret );
}
int main( void )
{
int ret, len, written;
mbedtls_net_context server_fd;
unsigned char buf[1024];
const char *pers = "pinning_client";
/* XXX create some state for our verify callback */
struct vrfy_state vrfy_state = {
.pins = pins,
};
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_x509_crt cacert;
/* Ensure valid memory references */
mbedtls_net_init( &server_fd );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
mbedtls_x509_crt_init( &cacert );
mbedtls_ctr_drbg_init( &ctr_drbg );
mbedtls_entropy_init( &entropy );
/*
* 0. Initialize the RNG and the session data
*/
mbedtls_printf( "\n . Seeding the random number generator..." );
fflush( stdout );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1. Load certificates
*/
mbedtls_printf( " . Loading the CA root certificate ..." );
fflush( stdout );
ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_cas_pem,
mbedtls_test_cas_pem_len );
if( ret < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned -0x%x\n\n", -ret );
goto exit;
}
mbedtls_printf( " ok (%d skipped)\n", ret );
/*
* 2. Start the TCP connection
*/
mbedtls_printf( " . Connecting to tcp/%s/%s...", SERVER_NAME, SERVER_PORT );
fflush( stdout );
if( ( ret = mbedtls_net_connect( &server_fd, SERVER_NAME,
SERVER_PORT, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 3. Setup SSL/TSL stuff
*/
mbedtls_printf( " . Setting up the SSL/TLS structure..." );
fflush( stdout );
if( ( ret = mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
#if defined(MBEDTLS_DEBUG_C)
mbedtls_debug_set_threshold( DEBUG_LEVEL );
#endif
mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
/* XXX: register our certificate verification callback */
mbedtls_ssl_conf_verify( &conf, my_verify, &vrfy_state );
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_set_hostname( &ssl, SERVER_NAME ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
mbedtls_printf( " ok\n" );
/*
* 4. Handshake
*/
mbedtls_printf( " . Performing the SSL/TLS handshake..." );
fflush( stdout );
while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret );
goto exit;
}
}
mbedtls_printf( " ok\n" );
/*
* 5. Write request
*/
mbedtls_printf( " > Write to server:" );
fflush( stdout );
len = snprintf( (char *) buf, sizeof( buf ), GET_REQUEST );
if( len < 0 || (size_t) len > sizeof( buf ) )
{
mbedtls_printf( " failed\n ! buffer too small for request\n\n" );
goto exit;
}
for( written = 0; written < len; written += ret )
{
while( ( ret = mbedtls_ssl_write( &ssl, buf + written, len - written ) )
<= 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_write returned -0x%x\n\n", -ret );
goto exit;
}
}
}
mbedtls_printf( " %d bytes written\n\n%s", written, (char *) buf );
/*
* 6. Read the HTTP response
*/
mbedtls_printf( " < Read from server:" );
fflush( stdout );
do
{
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
ret = mbedtls_ssl_read( &ssl, buf, len );
if( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE )
continue;
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
mbedtls_printf( " connection was closed gracefully\n" );
ret = 0;
goto close_notify;
case 0:
case MBEDTLS_ERR_NET_CONN_RESET:
mbedtls_printf( " connection was reset by peer\n" );
ret = 0;
goto exit;
default:
mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n", -ret );
goto exit;
}
}
len = ret;
buf[len] = '\0';
mbedtls_printf( " %d bytes read\n\n%s", len, (char *) buf );
/* End of message should be detected according to the syntax of the
* application protocol (eg HTTP), just use a dummy test here. */
if( ret > 0 && buf[len-1] == '\n' )
{
ret = 0;
break;
}
}
while( 1 );
/*
* 8. Done, cleanly close the connection
*/
close_notify:
mbedtls_printf( " . Closing the connection..." );
fflush( stdout );
/* No error checking, the connection might be closed already */
do ret = mbedtls_ssl_close_notify( &ssl );
while( ret == MBEDTLS_ERR_SSL_WANT_WRITE );
ret = 0;
mbedtls_printf( " done\n" );
exit:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf );
}
#endif
mbedtls_net_free( &server_fd );
mbedtls_x509_crt_free( &cacert );
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret != 0 );
}
int main( int argc, char *argv[] )
{
int ret;
mbedtls_net_context listen_fd, client_fd, server_fd;
int nb_fds;
fd_set read_fds;
mbedtls_net_init( &listen_fd );
mbedtls_net_init( &client_fd );
mbedtls_net_init( &server_fd );
get_options( argc, argv );
/*
* Decisions to drop/delay/duplicate packets are pseudo-random: dropping
* exactly 1 in N packets would lead to problems when a flight has exactly
* N packets: the same packet would be dropped on every resend.
*
* In order to be able to reproduce problems reliably, the seed may be
* specified explicitly.
*/
if( opt.seed == 0 )
{
opt.seed = (unsigned int) time( NULL );
mbedtls_printf( " . Pseudo-random seed: %u\n", opt.seed );
}
srand( opt.seed );
/*
* 0. "Connect" to the server
*/
mbedtls_printf( " . Connect to server on UDP/%s/%s ...",
opt.server_addr, opt.server_port );
fflush( stdout );
if( ( ret = mbedtls_net_connect( &server_fd, opt.server_addr, opt.server_port,
MBEDTLS_NET_PROTO_UDP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1. Setup the "listening" UDP socket
*/
mbedtls_printf( " . Bind on UDP/%s/%s ...",
opt.listen_addr, opt.listen_port );
fflush( stdout );
if( ( ret = mbedtls_net_bind( &listen_fd, opt.listen_addr, opt.listen_port,
MBEDTLS_NET_PROTO_UDP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 2. Wait until a client connects
*/
accept:
mbedtls_net_free( &client_fd );
mbedtls_printf( " . Waiting for a remote connection ..." );
fflush( stdout );
if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
NULL, 0, NULL ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_accept returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 3. Forward packets forever (kill the process to terminate it)
*/
clear_pending();
memset( dropped, 0, sizeof( dropped ) );
nb_fds = client_fd.fd;
if( nb_fds < server_fd.fd )
nb_fds = server_fd.fd;
if( nb_fds < listen_fd.fd )
nb_fds = listen_fd.fd;
++nb_fds;
while( 1 )
{
FD_ZERO( &read_fds );
FD_SET( server_fd.fd, &read_fds );
FD_SET( client_fd.fd, &read_fds );
FD_SET( listen_fd.fd, &read_fds );
if( ( ret = select( nb_fds, &read_fds, NULL, NULL, NULL ) ) <= 0 )
{
perror( "select" );
goto exit;
}
if( FD_ISSET( listen_fd.fd, &read_fds ) )
goto accept;
if( FD_ISSET( client_fd.fd, &read_fds ) )
{
if( ( ret = handle_message( "S <- C",
&server_fd, &client_fd ) ) != 0 )
goto accept;
}
if( FD_ISSET( server_fd.fd, &read_fds ) )
{
if( ( ret = handle_message( "S -> C",
&client_fd, &server_fd ) ) != 0 )
goto accept;
}
}
exit:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf( "Last error was: -0x%04X - %s\n\n", - ret, error_buf );
fflush( stdout );
}
#endif
mbedtls_net_free( &client_fd );
mbedtls_net_free( &server_fd );
mbedtls_net_free( &listen_fd );
#if defined(_WIN32)
mbedtls_printf( " Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret != 0 );
}
int main( void )
{
int ret;
mbedtls_net_context listen_fd, client_fd;
const char pers[] = "ssl_pthread_server";
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_config conf;
mbedtls_x509_crt srvcert;
mbedtls_x509_crt cachain;
mbedtls_pk_context pkey;
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
unsigned char alloc_buf[100000];
#endif
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_context cache;
#endif
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
mbedtls_memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
#endif
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_init( &cache );
#endif
mbedtls_x509_crt_init( &srvcert );
mbedtls_x509_crt_init( &cachain );
mbedtls_ssl_config_init( &conf );
mbedtls_ctr_drbg_init( &ctr_drbg );
memset( threads, 0, sizeof(threads) );
mbedtls_net_init( &listen_fd );
mbedtls_net_init( &client_fd );
mbedtls_mutex_init( &debug_mutex );
base_info.config = &conf;
/*
* We use only a single entropy source that is used in all the threads.
*/
mbedtls_entropy_init( &entropy );
/*
* 1. Load the certificates and private RSA key
*/
mbedtls_printf( "\n . Loading the server cert. and key..." );
fflush( stdout );
/*
* This demonstration program uses embedded test certificates.
* Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
* server and CA certificates, as well as mbedtls_pk_parse_keyfile().
*/
ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
mbedtls_test_srv_crt_len );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
ret = mbedtls_x509_crt_parse( &cachain, (const unsigned char *) mbedtls_test_cas_pem,
mbedtls_test_cas_pem_len );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
mbedtls_pk_init( &pkey );
ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
mbedtls_test_srv_key_len, NULL, 0 );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1b. Seed the random number generator
*/
mbedtls_printf( " . Seeding the random number generator..." );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed: mbedtls_ctr_drbg_seed returned -0x%04x\n",
-ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1c. Prepare SSL configuration
*/
mbedtls_printf( " . Setting up the SSL data...." );
if( ( ret = mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_SERVER,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed: mbedtls_ssl_config_defaults returned -0x%04x\n",
-ret );
goto exit;
}
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_mutexed_debug, stdout );
/* mbedtls_ssl_cache_get() and mbedtls_ssl_cache_set() are thread-safe if
* MBEDTLS_THREADING_C is set.
*/
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_conf_session_cache( &conf, &cache,
mbedtls_ssl_cache_get,
mbedtls_ssl_cache_set );
#endif
mbedtls_ssl_conf_ca_chain( &conf, &cachain, NULL );
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 2. Setup the listening TCP socket
*/
mbedtls_printf( " . Bind on https://localhost:4433/ ..." );
fflush( stdout );
if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
reset:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf( " [ main ] Last error was: -0x%04x - %s\n", -ret, error_buf );
}
#endif
/*
* 3. Wait until a client connects
*/
mbedtls_printf( " [ main ] Waiting for a remote connection\n" );
if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
NULL, 0, NULL ) ) != 0 )
{
mbedtls_printf( " [ main ] failed: mbedtls_net_accept returned -0x%04x\n", ret );
goto exit;
}
mbedtls_printf( " [ main ] ok\n" );
mbedtls_printf( " [ main ] Creating a new thread\n" );
if( ( ret = thread_create( &client_fd ) ) != 0 )
{
mbedtls_printf( " [ main ] failed: thread_create returned %d\n", ret );
mbedtls_net_free( &client_fd );
goto reset;
}
ret = 0;
goto reset;
exit:
mbedtls_x509_crt_free( &srvcert );
mbedtls_pk_free( &pkey );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_free( &cache );
#endif
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
mbedtls_ssl_config_free( &conf );
mbedtls_net_free( &listen_fd );
mbedtls_mutex_free( &debug_mutex );
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
mbedtls_memory_buffer_alloc_free();
#endif
#if defined(_WIN32)
mbedtls_printf( " Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
int dtlsclient_main( int argc, char *argv[] )
{
int ret, len;
mbedtls_net_context server_fd;
uint32_t flags;
unsigned char buf[1024];
const char *pers = "dtls_client";
int retry_left = MAX_RETRY;
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_x509_crt cacert;
mbedtls_timing_delay_context timer;
((void) argc);
((void) argv);
#if defined(MBEDTLS_DEBUG_C)
mbedtls_debug_set_threshold( DEBUG_LEVEL );
#endif
/*
* 0. Initialize the RNG and the session data
*/
mbedtls_net_init( &server_fd );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
mbedtls_x509_crt_init( &cacert );
mbedtls_ctr_drbg_init( &ctr_drbg );
mbedtls_printf( "\n . Seeding the random number generator..." );
fflush( stdout );
mbedtls_entropy_init( &entropy );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 0. Load certificates
*/
mbedtls_printf( " . Loading the CA root certificate ..." );
fflush( stdout );
ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_cas_pem,
mbedtls_test_cas_pem_len );
if( ret < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned -0x%x\n\n", -ret );
goto exit;
}
mbedtls_printf( " ok (%d skipped)\n", ret );
/*
* 1. Start the connection
*/
mbedtls_printf( " . Connecting to udp/%s/%s...", SERVER_NAME, SERVER_PORT );
fflush( stdout );
if( ( ret = mbedtls_net_connect( &server_fd, SERVER_ADDR,
SERVER_PORT, MBEDTLS_NET_PROTO_UDP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 2. Setup stuff
*/
mbedtls_printf( " . Setting up the DTLS structure..." );
fflush( stdout );
if( ( ret = mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_DATAGRAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
/* OPTIONAL is usually a bad choice for security, but makes interop easier
* in this simplified example, in which the ca chain is hardcoded.
* Production code should set a proper ca chain and use REQUIRED. */
mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_OPTIONAL );
mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_set_hostname( &ssl, SERVER_NAME ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_set_bio( &ssl, &server_fd,
mbedtls_net_send, mbedtls_net_recv, mbedtls_net_recv_timeout );
mbedtls_ssl_set_timer_cb( &ssl, &timer, mbedtls_timing_set_delay,
mbedtls_timing_get_delay );
mbedtls_printf( " ok\n" );
/*
* 4. Handshake
*/
mbedtls_printf( " . Performing the SSL/TLS handshake..." );
fflush( stdout );
do ret = mbedtls_ssl_handshake( &ssl );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 5. Verify the server certificate
*/
mbedtls_printf( " . Verifying peer X.509 certificate..." );
/* In real life, we would have used MBEDTLS_SSL_VERIFY_REQUIRED so that the
* handshake would not succeed if the peer's cert is bad. Even if we used
* MBEDTLS_SSL_VERIFY_OPTIONAL, we would bail out here if ret != 0 */
if( ( flags = mbedtls_ssl_get_verify_result( &ssl ) ) != 0 )
{
char vrfy_buf[512];
mbedtls_printf( " failed\n" );
mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
mbedtls_printf( "%s\n", vrfy_buf );
}
else
mbedtls_printf( " ok\n" );
/*
* 6. Write the echo request
*/
send_request:
mbedtls_printf( " > Write to server:" );
fflush( stdout );
len = sizeof( MESSAGE ) - 1;
do ret = mbedtls_ssl_write( &ssl, (unsigned char *) MESSAGE, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
goto exit;
}
len = ret;
mbedtls_printf( " %d bytes written\n\n%s\n\n", len, MESSAGE );
/*
* 7. Read the echo response
*/
mbedtls_printf( " < Read from server:" );
fflush( stdout );
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
do ret = mbedtls_ssl_read( &ssl, buf, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_TIMEOUT:
mbedtls_printf( " timeout\n\n" );
if( retry_left-- > 0 )
goto send_request;
goto exit;
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
mbedtls_printf( " connection was closed gracefully\n" );
ret = 0;
goto close_notify;
default:
mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n\n", -ret );
goto exit;
}
}
len = ret;
mbedtls_printf( " %d bytes read\n\n%s\n\n", len, buf );
/*
* 8. Done, cleanly close the connection
*/
close_notify:
mbedtls_printf( " . Closing the connection..." );
/* No error checking, the connection might be closed already */
do ret = mbedtls_ssl_close_notify( &ssl );
while( ret == MBEDTLS_ERR_SSL_WANT_WRITE );
ret = 0;
mbedtls_printf( " done\n" );
/*
* 9. Final clean-ups and exit
*/
exit:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf( "Last error was: %d - %s\n\n", ret, error_buf );
}
#endif
mbedtls_net_free( &server_fd );
mbedtls_x509_crt_free( &cacert );
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
/* Shell can not handle large exit numbers -> 1 for errors */
if( ret < 0 )
ret = 1;
return( ret );
}
static void tls_client_free(struct client *c)
{
mbedtls_ssl_close_notify(&c->ssl);
mbedtls_net_free(&c->fd);
}
int main( void )
{
int ret, len, cnt = 0, pid;
mbedtls_net_context listen_fd, client_fd;
unsigned char buf[1024];
const char *pers = "ssl_fork_server";
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_x509_crt srvcert;
mbedtls_pk_context pkey;
mbedtls_net_init( &listen_fd );
mbedtls_net_init( &client_fd );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
mbedtls_entropy_init( &entropy );
mbedtls_pk_init( &pkey );
mbedtls_x509_crt_init( &srvcert );
mbedtls_ctr_drbg_init( &ctr_drbg );
signal( SIGCHLD, SIG_IGN );
/*
* 0. Initial seeding of the RNG
*/
mbedtls_printf( "\n . Initial seeding of the random generator..." );
fflush( stdout );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1. Load the certificates and private RSA key
*/
mbedtls_printf( " . Loading the server cert. and key..." );
fflush( stdout );
/*
* This demonstration program uses embedded test certificates.
* Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
* server and CA certificates, as well as mbedtls_pk_parse_keyfile().
*/
ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
mbedtls_test_srv_crt_len );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_cas_pem,
mbedtls_test_cas_pem_len );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
mbedtls_test_srv_key_len, NULL, 0 );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1b. Prepare SSL configuration
*/
mbedtls_printf( " . Configuring SSL..." );
fflush( stdout );
if( ( ret = mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_SERVER,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
mbedtls_ssl_conf_ca_chain( &conf, srvcert.next, NULL );
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 2. Setup the listening TCP socket
*/
mbedtls_printf( " . Bind on https://localhost:4433/ ..." );
fflush( stdout );
if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
while( 1 )
{
/*
* 3. Wait until a client connects
*/
mbedtls_net_init( &client_fd );
mbedtls_ssl_init( &ssl );
mbedtls_printf( " . Waiting for a remote connection ..." );
fflush( stdout );
if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
NULL, 0, NULL ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_accept returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 3.5. Forking server thread
*/
pid = fork();
mbedtls_printf( " . Forking to handle connection ..." );
fflush( stdout );
if( pid < 0 )
{
mbedtls_printf(" failed\n ! fork returned %d\n\n", pid );
goto exit;
}
mbedtls_printf( " ok\n" );
if( pid != 0 )
{
if( ( ret = mbedtls_ctr_drbg_reseed( &ctr_drbg,
(const unsigned char *) "parent",
6 ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_reseed returned %d\n", ret );
goto exit;
}
mbedtls_net_free( &client_fd );
continue;
}
mbedtls_net_free( &listen_fd );
/*
* 4. Setup stuff
*/
mbedtls_printf( " . Setting up the SSL data...." );
fflush( stdout );
if( ( ret = mbedtls_ctr_drbg_reseed( &ctr_drbg,
(const unsigned char *) "child",
5 ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_reseed returned %d\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_set_bio( &ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
mbedtls_printf( " ok\n" );
/*
* 5. Handshake
*/
mbedtls_printf( " . Performing the SSL/TLS handshake..." );
fflush( stdout );
while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret );
goto exit;
}
}
mbedtls_printf( " ok\n" );
/*
* 6. Read the HTTP Request
*/
mbedtls_printf( " < Read from client:" );
fflush( stdout );
do
{
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
ret = mbedtls_ssl_read( &ssl, buf, len );
if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
continue;
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
mbedtls_printf( " connection was closed gracefully\n" );
break;
case MBEDTLS_ERR_NET_CONN_RESET:
mbedtls_printf( " connection was reset by peer\n" );
break;
default:
mbedtls_printf( " mbedtls_ssl_read returned %d\n", ret );
break;
}
break;
}
len = ret;
mbedtls_printf( " %d bytes read\n\n%s", len, (char *) buf );
if( ret > 0 )
break;
}
while( 1 );
/*
* 7. Write the 200 Response
*/
mbedtls_printf( " > Write to client:" );
fflush( stdout );
len = sprintf( (char *) buf, HTTP_RESPONSE,
mbedtls_ssl_get_ciphersuite( &ssl ) );
while( cnt++ < 100 )
{
while( ( ret = mbedtls_ssl_write( &ssl, buf, len ) ) <= 0 )
{
if( ret == MBEDTLS_ERR_NET_CONN_RESET )
{
mbedtls_printf( " failed\n ! peer closed the connection\n\n" );
goto exit;
}
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
goto exit;
}
}
len = ret;
mbedtls_printf( " %d bytes written\n\n%s\n", len, (char *) buf );
mbedtls_net_usleep( 1000000 );
}
mbedtls_ssl_close_notify( &ssl );
goto exit;
}
exit:
mbedtls_net_free( &client_fd );
mbedtls_net_free( &listen_fd );
mbedtls_x509_crt_free( &srvcert );
mbedtls_pk_free( &pkey );
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(_WIN32)
mbedtls_printf( " Press Enter to exit this program.\n" );
fflush( stdout );
getchar();
#endif
return( ret );
}
static void https_get_task(void *pvParameters)
{
char buf[512];
int ret, flags, len;
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_x509_crt cacert;
mbedtls_ssl_config conf;
mbedtls_net_context server_fd;
mbedtls_ssl_init(&ssl);
mbedtls_x509_crt_init(&cacert);
mbedtls_ctr_drbg_init(&ctr_drbg);
ESP_LOGI(TAG, "Seeding the random number generator");
mbedtls_ssl_config_init(&conf);
mbedtls_entropy_init(&entropy);
if((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
NULL, 0)) != 0)
{
ESP_LOGE(TAG, "mbedtls_ctr_drbg_seed returned %d", ret);
abort();
}
ESP_LOGI(TAG, "Loading the CA root certificate...");
ret = mbedtls_x509_crt_parse(&cacert, server_root_cert_pem_start,
server_root_cert_pem_end-server_root_cert_pem_start);
if(ret < 0)
{
ESP_LOGE(TAG, "mbedtls_x509_crt_parse returned -0x%x\n\n", -ret);
abort();
}
ESP_LOGI(TAG, "Setting hostname for TLS session...");
/* Hostname set here should match CN in server certificate */
if((ret = mbedtls_ssl_set_hostname(&ssl, WEB_SERVER)) != 0)
{
ESP_LOGE(TAG, "mbedtls_ssl_set_hostname returned -0x%x", -ret);
abort();
}
ESP_LOGI(TAG, "Setting up the SSL/TLS structure...");
if((ret = mbedtls_ssl_config_defaults(&conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT)) != 0)
{
ESP_LOGE(TAG, "mbedtls_ssl_config_defaults returned %d", ret);
goto exit;
}
/* MBEDTLS_SSL_VERIFY_OPTIONAL is bad for security, in this example it will print
a warning if CA verification fails but it will continue to connect.
You should consider using MBEDTLS_SSL_VERIFY_REQUIRED in your own code.
*/
mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
#ifdef CONFIG_MBEDTLS_DEBUG
mbedtls_esp_enable_debug_log(&conf, 4);
#endif
if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0)
{
ESP_LOGE(TAG, "mbedtls_ssl_setup returned -0x%x\n\n", -ret);
goto exit;
}
while(1) {
/* Wait for the callback to set the CONNECTED_BIT in the
event group.
*/
xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
false, true, portMAX_DELAY);
ESP_LOGI(TAG, "Connected to AP");
mbedtls_net_init(&server_fd);
ESP_LOGI(TAG, "Connecting to %s:%s...", WEB_SERVER, WEB_PORT);
if ((ret = mbedtls_net_connect(&server_fd, WEB_SERVER,
WEB_PORT, MBEDTLS_NET_PROTO_TCP)) != 0)
{
ESP_LOGE(TAG, "mbedtls_net_connect returned -%x", -ret);
goto exit;
}
ESP_LOGI(TAG, "Connected.");
mbedtls_ssl_set_bio(&ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL);
ESP_LOGI(TAG, "Performing the SSL/TLS handshake...");
while ((ret = mbedtls_ssl_handshake(&ssl)) != 0)
{
if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE)
{
ESP_LOGE(TAG, "mbedtls_ssl_handshake returned -0x%x", -ret);
goto exit;
}
}
ESP_LOGI(TAG, "Verifying peer X.509 certificate...");
if ((flags = mbedtls_ssl_get_verify_result(&ssl)) != 0)
{
/* In real life, we probably want to close connection if ret != 0 */
ESP_LOGW(TAG, "Failed to verify peer certificate!");
bzero(buf, sizeof(buf));
mbedtls_x509_crt_verify_info(buf, sizeof(buf), " ! ", flags);
ESP_LOGW(TAG, "verification info: %s", buf);
}
else {
ESP_LOGI(TAG, "Certificate verified.");
}
ESP_LOGI(TAG, "Cipher suite is %s", mbedtls_ssl_get_ciphersuite(&ssl));
ESP_LOGI(TAG, "Writing HTTP request...");
size_t written_bytes = 0;
do {
ret = mbedtls_ssl_write(&ssl,
(const unsigned char *)REQUEST + written_bytes,
strlen(REQUEST) - written_bytes);
if (ret >= 0) {
ESP_LOGI(TAG, "%d bytes written", ret);
written_bytes += ret;
} else if (ret != MBEDTLS_ERR_SSL_WANT_WRITE && ret != MBEDTLS_ERR_SSL_WANT_READ) {
ESP_LOGE(TAG, "mbedtls_ssl_write returned -0x%x", -ret);
goto exit;
}
} while(written_bytes < strlen(REQUEST));
ESP_LOGI(TAG, "Reading HTTP response...");
do
{
len = sizeof(buf) - 1;
bzero(buf, sizeof(buf));
ret = mbedtls_ssl_read(&ssl, (unsigned char *)buf, len);
if(ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE)
continue;
if(ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) {
ret = 0;
break;
}
if(ret < 0)
{
ESP_LOGE(TAG, "mbedtls_ssl_read returned -0x%x", -ret);
break;
}
if(ret == 0)
{
ESP_LOGI(TAG, "connection closed");
break;
}
len = ret;
ESP_LOGD(TAG, "%d bytes read", len);
/* Print response directly to stdout as it is read */
for(int i = 0; i < len; i++) {
putchar(buf[i]);
}
} while(1);
mbedtls_ssl_close_notify(&ssl);
exit:
mbedtls_ssl_session_reset(&ssl);
mbedtls_net_free(&server_fd);
if(ret != 0)
{
mbedtls_strerror(ret, buf, 100);
ESP_LOGE(TAG, "Last error was: -0x%x - %s", -ret, buf);
}
putchar('\n'); // JSON output doesn't have a newline at end
static int request_count;
ESP_LOGI(TAG, "Completed %d requests", ++request_count);
for(int countdown = 10; countdown >= 0; countdown--) {
ESP_LOGI(TAG, "%d...", countdown);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
ESP_LOGI(TAG, "Starting again!");
}
}
int main( int argc, const char *argv[] )
{
/* Client and server declarations. */
int ret;
int len;
#if SOCKET_COMMUNICATION
mbedtls_net_context listen_fd, client_fd, server_fd;
#endif
unsigned char buf[1024];
/* Handshake step counter */
size_t step = 1;
int flags;
mbedtls_ssl_context s_ssl, c_ssl;
mbedtls_ssl_config s_conf, c_conf;
mbedtls_x509_crt srvcert;
mbedtls_pk_context pkey;
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_context cache;
#endif
if( argc == 3)
{
packet_in_num = atoi(argv[1]);
packet_in_file = argv[2];
}
else if( argc != 1)
{
usage(argv[0]);
exit(1);
}
/* Server init */
#if SOCKET_COMMUNICATION
mbedtls_net_init( &listen_fd );
mbedtls_net_init( &client_fd );
#endif
mbedtls_ssl_init( &s_ssl );
mbedtls_ssl_config_init( &s_conf );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_init( &cache );
#endif
mbedtls_x509_crt_init( &srvcert );
mbedtls_pk_init( &pkey );
/* Client init */
#if SOCKET_COMMUNICATION
mbedtls_net_init( &server_fd );
#endif
mbedtls_ssl_init( &c_ssl );
mbedtls_ssl_config_init( &c_conf );
/*mbedtls_x509_crt_init( &cacert );*/
#if defined(MBEDTLS_DEBUG_C)
mbedtls_debug_set_threshold( DEBUG_LEVEL );
#endif
/*
* Server:
* Load the certificates and private RSA key
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Loading the server cert. and key..." );
fflush( stdout );
}
/*
* This demonstration program uses embedded test certificates.
* Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
* server and CA certificates, as well as mbedtls_pk_parse_keyfile().
*/
ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
mbedtls_test_srv_crt_len );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_cas_pem,
mbedtls_test_cas_pem_len );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
mbedtls_test_srv_key_len, NULL, 0 );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
goto exit;
}
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
/*
* Server:
* Setup stuff
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Server: Setting up the SSL data...." );
fflush( stdout );
}
if( ( ret = mbedtls_ssl_config_defaults( &s_conf,
MBEDTLS_SSL_IS_SERVER,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_conf_rng( &s_conf, mbedtls_ctr_drbg_deterministic, NULL );
mbedtls_ssl_conf_dbg( &s_conf, my_debug, stdout );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_conf_session_cache( &s_conf, &cache,
mbedtls_ssl_cache_get,
mbedtls_ssl_cache_set );
#endif
mbedtls_ssl_conf_ca_chain( &s_conf, srvcert.next, NULL );
if( ( ret = mbedtls_ssl_conf_own_cert( &s_conf, &srvcert, &pkey ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_setup( &s_ssl, &s_conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto exit;
}
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
mbedtls_ssl_session_reset( &s_ssl );
#if SOCKET_COMMUNICATION
/*
* Server:
* Setup the listening TCP socket
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Bind on https://localhost:%s/ ...", SERVER_PORT );
fflush( stdout );
}
if( ( ret = mbedtls_net_bind( &listen_fd, NULL, SERVER_PORT, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
goto exit;
}
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
/*
* Client:
* Start the connection
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Connecting to tcp/%s/%s...", SERVER_NAME, SERVER_PORT );
fflush( stdout );
}
if( ( ret = mbedtls_net_connect( &server_fd, SERVER_NAME,
SERVER_PORT, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
goto exit;
}
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
/*
* Server:
* Start listening for client connections
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Waiting for a remote connection ..." );
fflush( stdout );
}
/*
* Server:
* Accept client connection (socket is set non-blocking in
* library/net.c)
*/
if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
NULL, 0, NULL ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_accept returned %d\n\n", ret );
goto exit;
}
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
mbedtls_ssl_set_bio( &s_ssl, &client_fd, mbedtls_send_custom, mbedtls_recv_custom, NULL );
#else
mbedtls_ssl_set_bio( &s_ssl, NULL, mbedtls_server_send_buf, mbedtls_server_recv_buf, NULL );
#endif
/*
* Client:
* Setup stuff
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Client: Setting up the SSL/TLS structure..." );
fflush( stdout );
}
if( ( ret = mbedtls_ssl_config_defaults( &c_conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
/* OPTIONAL is not optimal for security,
* but makes interop easier in this simplified example */
mbedtls_ssl_conf_authmode( &c_conf, MBEDTLS_SSL_VERIFY_OPTIONAL );
/* NONE permits man-in-the-middle attacks. */
/*mbedtls_ssl_conf_authmode( &c_conf, MBEDTLS_SSL_VERIFY_NONE );*/
/*mbedtls_ssl_conf_authmode( &c_conf, MBEDTLS_SSL_VERIFY_REQUIRED );*/
mbedtls_ssl_conf_ca_chain( &c_conf, &srvcert, NULL );
mbedtls_ssl_conf_rng( &c_conf, mbedtls_ctr_drbg_deterministic, NULL );
mbedtls_ssl_conf_dbg( &c_conf, my_debug, stdout );
if( ( ret = mbedtls_ssl_setup( &c_ssl, &c_conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_set_hostname( &c_ssl, "mbed TLS Server 1" ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
goto exit;
}
#if SOCKET_COMMUNICATION
mbedtls_ssl_set_bio( &c_ssl, &server_fd, mbedtls_send_custom, mbedtls_recv_custom, NULL );
#else
mbedtls_ssl_set_bio( &c_ssl, NULL, mbedtls_client_send_buf, mbedtls_client_recv_buf, NULL );
#endif
if( packet_in_num == 0 )
{
mbedtls_printf( " . Performing the SSL/TLS handshake...\n" );
fflush( stdout );
}
/*
* The following number of steps are hardcoded to ensure
* that the client and server complete the handshake without
* waiting infinitely for the other side to send data.
*
* 1 2 3 4 5 6 7 8 9 10
*/
int client_steps[] = { 2, 1, 1, 1, 4, 2, 1, 1, 2, 1 };
int server_steps[] = { 3, 1, 1, 2, 3, 1, 2, 1, 1, 1 };
do {
/*
* Client:
* Handshake step
*/
int i;
int no_steps;
if( c_ssl.state == MBEDTLS_SSL_HANDSHAKE_OVER) {
no_steps = 0;
} else {
no_steps = client_steps[step - 1];
}
for (i = 0; i < no_steps; i++) {
if( ( ret = mbedtls_ssl_handshake_step( &c_ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret );
goto exit;
}
}
}
if( packet_in_num == 0 )
{
mbedtls_printf( "--- client handshake step %zd ok\n", step );
}
/*
* Server:
* Handshake step
*/
if( s_ssl.state == MBEDTLS_SSL_HANDSHAKE_OVER) {
no_steps = 0;
} else {
no_steps = server_steps[step - 1];
}
for (i = 0; i < no_steps; i++) {
if( ( ret = mbedtls_ssl_handshake_step( &s_ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret );
goto exit;
}
}
}
if( packet_in_num == 0 )
{
mbedtls_printf( "--- server handshake step %zd ok\n", step );
}
step++;
} while( ((c_ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER)
|| (s_ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER))
&& (step <= MAX_HANDSHAKE_STEPS) );
if( packet_in_num == 0 )
{
mbedtls_printf( "c_ssl.state: %d\n", c_ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER );
mbedtls_printf( "s_ssl.state: %d\n", s_ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER );
}
/*
* Client:
* Verify the server certificate
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Verifying peer X.509 certificate..." );
}
/* In real life, we probably want to bail out when ret != 0 */
if( ( flags = mbedtls_ssl_get_verify_result( &c_ssl ) ) != 0 )
{
char vrfy_buf[512];
mbedtls_printf( " failed\n" );
mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
mbedtls_printf( "%s\n", vrfy_buf );
}
else if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
/*
* Client:
* Write the GET request
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " > Write to server:" );
fflush( stdout );
}
len = sprintf( (char *) buf, GET_REQUEST );
while( ( ret = mbedtls_ssl_write( &c_ssl, buf, len ) ) <= 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
goto exit;
}
}
len = ret;
if( packet_in_num == 0 )
{
mbedtls_printf( " %d bytes written\n\n%s", len, (char *) buf );
}
/*
* Server:
* Read the HTTP Request
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " < Read from client:" );
fflush( stdout );
}
do
{
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
ret = mbedtls_ssl_read( &s_ssl, buf, len );
if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
continue;
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
mbedtls_printf( " connection was closed gracefully\n" );
break;
case MBEDTLS_ERR_NET_CONN_RESET:
mbedtls_printf( " connection was reset by peer\n" );
break;
default:
mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n", -ret );
break;
}
break;
}
len = ret;
if( packet_in_num == 0 )
{
mbedtls_printf( " %d bytes read\n\n%s", len, (char *) buf );
}
if( ret > 0 )
break;
}
while( 1 );
/*
* Server:
* Write the 200 Response
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " > Write to client:" );
fflush( stdout );
}
len = sprintf( (char *) buf, HTTP_RESPONSE,
mbedtls_ssl_get_ciphersuite( &s_ssl ) );
while( ( ret = mbedtls_ssl_write( &s_ssl, buf, len ) ) <= 0 )
{
if( ret == MBEDTLS_ERR_NET_CONN_RESET )
{
mbedtls_printf( " failed\n ! peer closed the connection\n\n" );
goto exit;
}
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
goto exit;
}
}
len = ret;
if( packet_in_num == 0 )
{
mbedtls_printf( " %d bytes written\n\n%s\n", len, (char *) buf );
}
/*
* Client:
* Read the HTTP response
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " < Read from server:" );
fflush( stdout );
}
do
{
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
ret = mbedtls_ssl_read( &c_ssl, buf, len );
if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
continue;
if( ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY )
{
ret = 0;
break;
}
if( ret < 0 )
{
mbedtls_printf( "failed\n ! mbedtls_ssl_read returned %d\n\n", ret );
break;
}
if( ret == 0 )
{
mbedtls_printf( "\n\nEOF\n\n" );
break;
}
len = ret;
if( packet_in_num == 0 )
{
mbedtls_printf( " %d bytes read\n\n%s", len, (char *) buf );
}
/*
* Server:
* Client read response. Close connection.
*/
if ( packet_in_num == 0 )
{
mbedtls_printf( " . Closing the connection..." );
fflush( stdout );
}
while( ( ret = mbedtls_ssl_close_notify( &s_ssl ) ) < 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_close_notify returned %d\n\n", ret );
goto exit;
}
}
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
}
while( 1 );
/*
* Client:
* Close connection.
*/
if( packet_in_num == 0 )
{
mbedtls_printf( " . Closing the connection..." );
fflush( stdout );
}
mbedtls_ssl_close_notify( &c_ssl );
if( packet_in_num == 0 )
{
mbedtls_printf( " ok\n" );
}
/*
* Server:
* We do not have multiple clients and therefore do not goto reset.
*/
/*ret = 0;*/
/*goto reset;*/
exit:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf );
}
#endif
#if SOCKET_COMMUNICATION
mbedtls_net_free( &client_fd );
mbedtls_net_free( &listen_fd );
mbedtls_net_free( &server_fd );
#endif
mbedtls_x509_crt_free( &srvcert );
mbedtls_pk_free( &pkey );
mbedtls_ssl_free( &s_ssl );
mbedtls_ssl_free( &c_ssl );
mbedtls_ssl_config_free( &s_conf );
mbedtls_ssl_config_free( &c_conf );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_free( &cache );
#endif
#if defined(_WIN32)
mbedtls_printf( " Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
int main( void )
{
int ret, len;
mbedtls_net_context listen_fd, client_fd;
unsigned char buf[1024];
const char *pers = "dtls_server";
unsigned char client_ip[16] = { 0 };
size_t cliip_len;
mbedtls_ssl_cookie_ctx cookie_ctx;
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_x509_crt srvcert;
mbedtls_pk_context pkey;
mbedtls_timing_delay_context timer;
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_context cache;
#endif
mbedtls_net_init( &listen_fd );
mbedtls_net_init( &client_fd );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
mbedtls_ssl_cookie_init( &cookie_ctx );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_init( &cache );
#endif
mbedtls_x509_crt_init( &srvcert );
mbedtls_pk_init( &pkey );
mbedtls_entropy_init( &entropy );
mbedtls_ctr_drbg_init( &ctr_drbg );
#if defined(MBEDTLS_DEBUG_C)
mbedtls_debug_set_threshold( DEBUG_LEVEL );
#endif
/*
* 1. Load the certificates and private RSA key
*/
printf( "\n . Loading the server cert. and key..." );
fflush( stdout );
/*
* This demonstration program uses embedded test certificates.
* Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
* server and CA certificates, as well as mbedtls_pk_parse_keyfile().
*/
ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
mbedtls_test_srv_crt_len );
if( ret != 0 )
{
printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_cas_pem,
mbedtls_test_cas_pem_len );
if( ret != 0 )
{
printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
mbedtls_test_srv_key_len, NULL, 0 );
if( ret != 0 )
{
printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
goto exit;
}
printf( " ok\n" );
/*
* 2. Setup the "listening" UDP socket
*/
printf( " . Bind on udp/*/4433 ..." );
fflush( stdout );
if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_UDP ) ) != 0 )
{
printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
goto exit;
}
printf( " ok\n" );
/*
* 3. Seed the RNG
*/
printf( " . Seeding the random number generator..." );
fflush( stdout );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
goto exit;
}
printf( " ok\n" );
/*
* 4. Setup stuff
*/
printf( " . Setting up the DTLS data..." );
fflush( stdout );
if( ( ret = mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_SERVER,
MBEDTLS_SSL_TRANSPORT_DATAGRAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_conf_session_cache( &conf, &cache,
mbedtls_ssl_cache_get,
mbedtls_ssl_cache_set );
#endif
mbedtls_ssl_conf_ca_chain( &conf, srvcert.next, NULL );
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
{
printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_cookie_setup( &cookie_ctx,
mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
{
printf( " failed\n ! mbedtls_ssl_cookie_setup returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_conf_dtls_cookies( &conf, mbedtls_ssl_cookie_write, mbedtls_ssl_cookie_check,
&cookie_ctx );
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
{
printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_set_timer_cb( &ssl, &timer, mbedtls_timing_set_delay,
mbedtls_timing_get_delay );
printf( " ok\n" );
reset:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
printf("Last error was: %d - %s\n\n", ret, error_buf );
}
#endif
mbedtls_net_free( &client_fd );
mbedtls_ssl_session_reset( &ssl );
/*
* 3. Wait until a client connects
*/
printf( " . Waiting for a remote connection ..." );
fflush( stdout );
if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
client_ip, sizeof( client_ip ), &cliip_len ) ) != 0 )
{
printf( " failed\n ! mbedtls_net_accept returned %d\n\n", ret );
goto exit;
}
/* For HelloVerifyRequest cookies */
if( ( ret = mbedtls_ssl_set_client_transport_id( &ssl,
client_ip, cliip_len ) ) != 0 )
{
printf( " failed\n ! "
"mbedtls_ssl_set_client_transport_id() returned -0x%x\n\n", -ret );
goto exit;
}
mbedtls_ssl_set_bio( &ssl, &client_fd,
mbedtls_net_send, mbedtls_net_recv, mbedtls_net_recv_timeout );
printf( " ok\n" );
/*
* 5. Handshake
*/
printf( " . Performing the DTLS handshake..." );
fflush( stdout );
do ret = mbedtls_ssl_handshake( &ssl );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED )
{
printf( " hello verification requested\n" );
ret = 0;
goto reset;
}
else if( ret != 0 )
{
printf( " failed\n ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret );
goto reset;
}
printf( " ok\n" );
/*
* 6. Read the echo Request
*/
printf( " < Read from client:" );
fflush( stdout );
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
do ret = mbedtls_ssl_read( &ssl, buf, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_TIMEOUT:
printf( " timeout\n\n" );
goto reset;
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
printf( " connection was closed gracefully\n" );
ret = 0;
goto close_notify;
default:
printf( " mbedtls_ssl_read returned -0x%x\n\n", -ret );
goto reset;
}
}
len = ret;
printf( " %d bytes read\n\n%s\n\n", len, buf );
/*
* 7. Write the 200 Response
*/
printf( " > Write to client:" );
fflush( stdout );
do ret = mbedtls_ssl_write( &ssl, buf, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret < 0 )
{
printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
goto exit;
}
len = ret;
printf( " %d bytes written\n\n%s\n\n", len, buf );
/*
* 8. Done, cleanly close the connection
*/
close_notify:
printf( " . Closing the connection..." );
/* No error checking, the connection might be closed already */
do ret = mbedtls_ssl_close_notify( &ssl );
while( ret == MBEDTLS_ERR_SSL_WANT_WRITE );
ret = 0;
printf( " done\n" );
goto reset;
/*
* Final clean-ups and exit
*/
exit:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
printf( "Last error was: %d - %s\n\n", ret, error_buf );
}
#endif
mbedtls_net_free( &client_fd );
mbedtls_net_free( &listen_fd );
mbedtls_x509_crt_free( &srvcert );
mbedtls_pk_free( &pkey );
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ssl_cookie_free( &cookie_ctx );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_free( &cache );
#endif
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(_WIN32)
printf( " Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
/* Shell can not handle large exit numbers -> 1 for errors */
if( ret < 0 )
ret = 1;
return( ret );
}
int main( void )
{
FILE *f;
int ret;
size_t n, buflen;
mbedtls_net_context server_fd;
unsigned char *p, *end;
unsigned char buf[2048];
unsigned char hash[32];
const char *pers = "dh_client";
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_rsa_context rsa;
mbedtls_dhm_context dhm;
mbedtls_aes_context aes;
mbedtls_net_init( &server_fd );
mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_SHA256 );
mbedtls_dhm_init( &dhm );
mbedtls_aes_init( &aes );
mbedtls_ctr_drbg_init( &ctr_drbg );
/*
* 1. Setup the RNG
*/
mbedtls_printf( "\n . Seeding the random number generator" );
fflush( stdout );
mbedtls_entropy_init( &entropy );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
goto exit;
}
/*
* 2. Read the server's public RSA key
*/
mbedtls_printf( "\n . Reading public key from rsa_pub.txt" );
fflush( stdout );
if( ( f = fopen( "rsa_pub.txt", "rb" ) ) == NULL )
{
ret = 1;
mbedtls_printf( " failed\n ! Could not open rsa_pub.txt\n" \
" ! Please run rsa_genkey first\n\n" );
goto exit;
}
mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
if( ( ret = mbedtls_mpi_read_file( &rsa.N, 16, f ) ) != 0 ||
( ret = mbedtls_mpi_read_file( &rsa.E, 16, f ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
goto exit;
}
rsa.len = ( mbedtls_mpi_bitlen( &rsa.N ) + 7 ) >> 3;
fclose( f );
/*
* 3. Initiate the connection
*/
mbedtls_printf( "\n . Connecting to tcp/%s/%s", SERVER_NAME,
SERVER_PORT );
fflush( stdout );
if( ( ret = mbedtls_net_connect( &server_fd, SERVER_NAME,
SERVER_PORT, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
goto exit;
}
/*
* 4a. First get the buffer length
*/
mbedtls_printf( "\n . Receiving the server's DH parameters" );
fflush( stdout );
memset( buf, 0, sizeof( buf ) );
if( ( ret = mbedtls_net_recv( &server_fd, buf, 2 ) ) != 2 )
{
mbedtls_printf( " failed\n ! mbedtls_net_recv returned %d\n\n", ret );
goto exit;
}
n = buflen = ( buf[0] << 8 ) | buf[1];
if( buflen < 1 || buflen > sizeof( buf ) )
{
mbedtls_printf( " failed\n ! Got an invalid buffer length\n\n" );
goto exit;
}
/*
* 4b. Get the DHM parameters: P, G and Ys = G^Xs mod P
*/
memset( buf, 0, sizeof( buf ) );
if( ( ret = mbedtls_net_recv( &server_fd, buf, n ) ) != (int) n )
{
mbedtls_printf( " failed\n ! mbedtls_net_recv returned %d\n\n", ret );
goto exit;
}
p = buf, end = buf + buflen;
if( ( ret = mbedtls_dhm_read_params( &dhm, &p, end ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_dhm_read_params returned %d\n\n", ret );
goto exit;
}
if( dhm.len < 64 || dhm.len > 512 )
{
ret = 1;
mbedtls_printf( " failed\n ! Invalid DHM modulus size\n\n" );
goto exit;
}
/*
* 5. Check that the server's RSA signature matches
* the SHA-256 hash of (P,G,Ys)
*/
mbedtls_printf( "\n . Verifying the server's RSA signature" );
fflush( stdout );
p += 2;
if( ( n = (size_t) ( end - p ) ) != rsa.len )
{
ret = 1;
mbedtls_printf( " failed\n ! Invalid RSA signature size\n\n" );
goto exit;
}
mbedtls_sha1( buf, (int)( p - 2 - buf ), hash );
if( ( ret = mbedtls_rsa_pkcs1_verify( &rsa, NULL, NULL, MBEDTLS_RSA_PUBLIC,
MBEDTLS_MD_SHA256, 0, hash, p ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_verify returned %d\n\n", ret );
goto exit;
}
/*
* 6. Send our public value: Yc = G ^ Xc mod P
*/
mbedtls_printf( "\n . Sending own public value to server" );
fflush( stdout );
n = dhm.len;
if( ( ret = mbedtls_dhm_make_public( &dhm, (int) dhm.len, buf, n,
mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_dhm_make_public returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_net_send( &server_fd, buf, n ) ) != (int) n )
{
mbedtls_printf( " failed\n ! mbedtls_net_send returned %d\n\n", ret );
goto exit;
}
/*
* 7. Derive the shared secret: K = Ys ^ Xc mod P
*/
mbedtls_printf( "\n . Shared secret: " );
fflush( stdout );
if( ( ret = mbedtls_dhm_calc_secret( &dhm, buf, sizeof( buf ), &n,
mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_dhm_calc_secret returned %d\n\n", ret );
goto exit;
}
for( n = 0; n < 16; n++ )
mbedtls_printf( "%02x", buf[n] );
/*
* 8. Setup the AES-256 decryption key
*
* This is an overly simplified example; best practice is
* to hash the shared secret with a random value to derive
* the keying material for the encryption/decryption keys,
* IVs and MACs.
*/
mbedtls_printf( "...\n . Receiving and decrypting the ciphertext" );
fflush( stdout );
mbedtls_aes_setkey_dec( &aes, buf, 256 );
memset( buf, 0, sizeof( buf ) );
if( ( ret = mbedtls_net_recv( &server_fd, buf, 16 ) ) != 16 )
{
mbedtls_printf( " failed\n ! mbedtls_net_recv returned %d\n\n", ret );
goto exit;
}
mbedtls_aes_crypt_ecb( &aes, MBEDTLS_AES_DECRYPT, buf, buf );
buf[16] = '\0';
mbedtls_printf( "\n . Plaintext is \"%s\"\n\n", (char *) buf );
exit:
mbedtls_net_free( &server_fd );
mbedtls_aes_free( &aes );
mbedtls_rsa_free( &rsa );
mbedtls_dhm_free( &dhm );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
int main( int argc, char *argv[] )
{
int ret = 0, len;
mbedtls_net_context server_fd;
unsigned char buf[1024];
#if defined(MBEDTLS_BASE64_C)
unsigned char base[1024];
#endif
char hostname[32];
const char *pers = "ssl_mail_client";
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_x509_crt cacert;
mbedtls_x509_crt clicert;
mbedtls_pk_context pkey;
int i;
size_t n;
char *p, *q;
const int *list;
/*
* Make sure memory references are valid in case we exit early.
*/
mbedtls_net_init( &server_fd );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
memset( &buf, 0, sizeof( buf ) );
mbedtls_x509_crt_init( &cacert );
mbedtls_x509_crt_init( &clicert );
mbedtls_pk_init( &pkey );
mbedtls_ctr_drbg_init( &ctr_drbg );
if( argc == 0 )
{
usage:
mbedtls_printf( USAGE );
list = mbedtls_ssl_list_ciphersuites();
while( *list )
{
mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name( *list ) );
list++;
}
mbedtls_printf("\n");
goto exit;
}
opt.server_name = DFL_SERVER_NAME;
opt.server_port = DFL_SERVER_PORT;
opt.debug_level = DFL_DEBUG_LEVEL;
opt.authentication = DFL_AUTHENTICATION;
opt.mode = DFL_MODE;
opt.user_name = DFL_USER_NAME;
opt.user_pwd = DFL_USER_PWD;
opt.mail_from = DFL_MAIL_FROM;
opt.mail_to = DFL_MAIL_TO;
opt.ca_file = DFL_CA_FILE;
opt.crt_file = DFL_CRT_FILE;
opt.key_file = DFL_KEY_FILE;
opt.force_ciphersuite[0]= DFL_FORCE_CIPHER;
for( i = 1; i < argc; i++ )
{
p = argv[i];
if( ( q = strchr( p, '=' ) ) == NULL )
goto usage;
*q++ = '\0';
if( strcmp( p, "server_name" ) == 0 )
opt.server_name = q;
else if( strcmp( p, "server_port" ) == 0 )
opt.server_port = q;
else if( strcmp( p, "debug_level" ) == 0 )
{
opt.debug_level = atoi( q );
if( opt.debug_level < 0 || opt.debug_level > 65535 )
goto usage;
}
else if( strcmp( p, "authentication" ) == 0 )
{
opt.authentication = atoi( q );
if( opt.authentication < 0 || opt.authentication > 1 )
goto usage;
}
else if( strcmp( p, "mode" ) == 0 )
{
opt.mode = atoi( q );
if( opt.mode < 0 || opt.mode > 1 )
goto usage;
}
else if( strcmp( p, "user_name" ) == 0 )
opt.user_name = q;
else if( strcmp( p, "user_pwd" ) == 0 )
opt.user_pwd = q;
else if( strcmp( p, "mail_from" ) == 0 )
opt.mail_from = q;
else if( strcmp( p, "mail_to" ) == 0 )
opt.mail_to = q;
else if( strcmp( p, "ca_file" ) == 0 )
opt.ca_file = q;
else if( strcmp( p, "crt_file" ) == 0 )
opt.crt_file = q;
else if( strcmp( p, "key_file" ) == 0 )
opt.key_file = q;
else if( strcmp( p, "force_ciphersuite" ) == 0 )
{
opt.force_ciphersuite[0] = -1;
opt.force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id( q );
if( opt.force_ciphersuite[0] <= 0 )
goto usage;
opt.force_ciphersuite[1] = 0;
}
else
goto usage;
}
/*
* 0. Initialize the RNG and the session data
*/
mbedtls_printf( "\n . Seeding the random number generator..." );
fflush( stdout );
mbedtls_entropy_init( &entropy );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1.1. Load the trusted CA
*/
mbedtls_printf( " . Loading the CA root certificate ..." );
fflush( stdout );
#if defined(MBEDTLS_FS_IO)
if( strlen( opt.ca_file ) )
ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file );
else
#endif
#if defined(MBEDTLS_CERTS_C)
ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_cas_pem,
mbedtls_test_cas_pem_len );
#else
{
ret = 1;
mbedtls_printf("MBEDTLS_CERTS_C not defined.");
}
#endif
if( ret < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok (%d skipped)\n", ret );
/*
* 1.2. Load own certificate and private key
*
* (can be skipped if client authentication is not required)
*/
mbedtls_printf( " . Loading the client cert. and key..." );
fflush( stdout );
#if defined(MBEDTLS_FS_IO)
if( strlen( opt.crt_file ) )
ret = mbedtls_x509_crt_parse_file( &clicert, opt.crt_file );
else
#endif
#if defined(MBEDTLS_CERTS_C)
ret = mbedtls_x509_crt_parse( &clicert, (const unsigned char *) mbedtls_test_cli_crt,
mbedtls_test_cli_crt_len );
#else
{
ret = -1;
mbedtls_printf("MBEDTLS_CERTS_C not defined.");
}
#endif
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
goto exit;
}
#if defined(MBEDTLS_FS_IO)
if( strlen( opt.key_file ) )
ret = mbedtls_pk_parse_keyfile( &pkey, opt.key_file, "" );
else
#endif
#if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_PEM_PARSE_C)
ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_cli_key,
mbedtls_test_cli_key_len, NULL, 0 );
#else
{
ret = -1;
mbedtls_printf("MBEDTLS_CERTS_C or MBEDTLS_PEM_PARSE_C not defined.");
}
#endif
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 2. Start the connection
*/
mbedtls_printf( " . Connecting to tcp/%s/%s...", opt.server_name,
opt.server_port );
fflush( stdout );
if( ( ret = mbedtls_net_connect( &server_fd, opt.server_name,
opt.server_port, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 3. Setup stuff
*/
mbedtls_printf( " . Setting up the SSL/TLS structure..." );
fflush( stdout );
if( ( ret = mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
/* OPTIONAL is not optimal for security,
* but makes interop easier in this simplified example */
mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_OPTIONAL );
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
if( opt.force_ciphersuite[0] != DFL_FORCE_CIPHER )
mbedtls_ssl_conf_ciphersuites( &conf, opt.force_ciphersuite );
mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &clicert, &pkey ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto exit;
}
if( ( ret = mbedtls_ssl_set_hostname( &ssl, opt.server_name ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
mbedtls_printf( " ok\n" );
if( opt.mode == MODE_SSL_TLS )
{
if( do_handshake( &ssl ) != 0 )
goto exit;
mbedtls_printf( " > Get header from server:" );
fflush( stdout );
ret = write_ssl_and_get_response( &ssl, buf, 0 );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write EHLO to server:" );
fflush( stdout );
gethostname( hostname, 32 );
len = sprintf( (char *) buf, "EHLO %s\r\n", hostname );
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
}
else
{
mbedtls_printf( " > Get header from server:" );
fflush( stdout );
ret = write_and_get_response( &server_fd, buf, 0 );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write EHLO to server:" );
fflush( stdout );
gethostname( hostname, 32 );
len = sprintf( (char *) buf, "EHLO %s\r\n", hostname );
ret = write_and_get_response( &server_fd, buf, len );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write STARTTLS to server:" );
fflush( stdout );
gethostname( hostname, 32 );
len = sprintf( (char *) buf, "STARTTLS\r\n" );
ret = write_and_get_response( &server_fd, buf, len );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
if( do_handshake( &ssl ) != 0 )
goto exit;
}
#if defined(MBEDTLS_BASE64_C)
if( opt.authentication )
{
mbedtls_printf( " > Write AUTH LOGIN to server:" );
fflush( stdout );
len = sprintf( (char *) buf, "AUTH LOGIN\r\n" );
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 200 || ret > 399 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write username to server: %s", opt.user_name );
fflush( stdout );
ret = mbedtls_base64_encode( base, sizeof( base ), &n, (const unsigned char *) opt.user_name,
strlen( opt.user_name ) );
if( ret != 0 ) {
mbedtls_printf( " failed\n ! mbedtls_base64_encode returned %d\n\n", ret );
goto exit;
}
len = sprintf( (char *) buf, "%s\r\n", base );
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 300 || ret > 399 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write password to server: %s", opt.user_pwd );
fflush( stdout );
ret = mbedtls_base64_encode( base, sizeof( base ), &n, (const unsigned char *) opt.user_pwd,
strlen( opt.user_pwd ) );
if( ret != 0 ) {
mbedtls_printf( " failed\n ! mbedtls_base64_encode returned %d\n\n", ret );
goto exit;
}
len = sprintf( (char *) buf, "%s\r\n", base );
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 200 || ret > 399 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
}
#endif
mbedtls_printf( " > Write MAIL FROM to server:" );
fflush( stdout );
len = sprintf( (char *) buf, "MAIL FROM:<%s>\r\n", opt.mail_from );
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write RCPT TO to server:" );
fflush( stdout );
len = sprintf( (char *) buf, "RCPT TO:<%s>\r\n", opt.mail_to );
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write DATA to server:" );
fflush( stdout );
len = sprintf( (char *) buf, "DATA\r\n" );
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 300 || ret > 399 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_printf( " > Write content to server:" );
fflush( stdout );
len = sprintf( (char *) buf, "From: %s\r\nSubject: mbed TLS Test mail\r\n\r\n"
"This is a simple test mail from the "
"mbed TLS mail client example.\r\n"
"\r\n"
"Enjoy!", opt.mail_from );
ret = write_ssl_data( &ssl, buf, len );
len = sprintf( (char *) buf, "\r\n.\r\n");
ret = write_ssl_and_get_response( &ssl, buf, len );
if( ret < 200 || ret > 299 )
{
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
goto exit;
}
mbedtls_printf(" ok\n" );
mbedtls_ssl_close_notify( &ssl );
exit:
mbedtls_net_free( &server_fd );
mbedtls_x509_crt_free( &clicert );
mbedtls_x509_crt_free( &cacert );
mbedtls_pk_free( &pkey );
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
static void *handle_ssl_connection( void *data )
{
int ret, len;
thread_info_t *thread_info = (thread_info_t *) data;
mbedtls_net_context *client_fd = &thread_info->client_fd;
long int thread_id = (long int) pthread_self();
unsigned char buf[1024];
mbedtls_ssl_context ssl;
/* Make sure memory references are valid */
mbedtls_ssl_init( &ssl );
mbedtls_printf( " [ #%ld ] Setting up SSL/TLS data\n", thread_id );
/*
* 4. Get the SSL context ready
*/
if( ( ret = mbedtls_ssl_setup( &ssl, thread_info->config ) ) != 0 )
{
mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_setup returned -0x%04x\n",
thread_id, -ret );
goto thread_exit;
}
mbedtls_ssl_set_bio( &ssl, client_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
/*
* 5. Handshake
*/
mbedtls_printf( " [ #%ld ] Performing the SSL/TLS handshake\n", thread_id );
while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_handshake returned -0x%04x\n",
thread_id, -ret );
goto thread_exit;
}
}
mbedtls_printf( " [ #%ld ] ok\n", thread_id );
/*
* 6. Read the HTTP Request
*/
mbedtls_printf( " [ #%ld ] < Read from client\n", thread_id );
do
{
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
ret = mbedtls_ssl_read( &ssl, buf, len );
if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
continue;
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
mbedtls_printf( " [ #%ld ] connection was closed gracefully\n",
thread_id );
goto thread_exit;
case MBEDTLS_ERR_NET_CONN_RESET:
mbedtls_printf( " [ #%ld ] connection was reset by peer\n",
thread_id );
goto thread_exit;
default:
mbedtls_printf( " [ #%ld ] mbedtls_ssl_read returned -0x%04x\n",
thread_id, -ret );
goto thread_exit;
}
}
len = ret;
mbedtls_printf( " [ #%ld ] %d bytes read\n=====\n%s\n=====\n",
thread_id, len, (char *) buf );
if( ret > 0 )
break;
}
while( 1 );
/*
* 7. Write the 200 Response
*/
mbedtls_printf( " [ #%ld ] > Write to client:\n", thread_id );
len = sprintf( (char *) buf, HTTP_RESPONSE,
mbedtls_ssl_get_ciphersuite( &ssl ) );
while( ( ret = mbedtls_ssl_write( &ssl, buf, len ) ) <= 0 )
{
if( ret == MBEDTLS_ERR_NET_CONN_RESET )
{
mbedtls_printf( " [ #%ld ] failed: peer closed the connection\n",
thread_id );
goto thread_exit;
}
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_write returned -0x%04x\n",
thread_id, ret );
goto thread_exit;
}
}
len = ret;
mbedtls_printf( " [ #%ld ] %d bytes written\n=====\n%s\n=====\n",
thread_id, len, (char *) buf );
mbedtls_printf( " [ #%ld ] . Closing the connection...", thread_id );
while( ( ret = mbedtls_ssl_close_notify( &ssl ) ) < 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_close_notify returned -0x%04x\n",
thread_id, ret );
goto thread_exit;
}
}
mbedtls_printf( " ok\n" );
ret = 0;
thread_exit:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf(" [ #%ld ] Last error was: -0x%04x - %s\n\n",
thread_id, -ret, error_buf );
}
#endif
mbedtls_net_free( client_fd );
mbedtls_ssl_free( &ssl );
thread_info->thread_complete = 1;
return( NULL );
}
