attiot / Mbed OS ATT_AWS_IoT_demo_v06

V.06 11/3

Dependencies:   FT6206 SDFileSystem SPI_TFT_ILI9341 TFT_fonts

Fork of ATT_AWS_IoT_demo by attiot

AWS_openssl/aws_iot_src/protocol/mqtt/aws_iot_embedded_client_wrapper/platform_mbed_os/mbedtls/network_mbedtls_wrapper.cpp@28:54d9a550adf1, 2017-10-09 (annotated)

Committer:
jilee
Date:
Mon Oct 09 21:13:49 2017 +0000
Revision:
28:54d9a550adf1
Parent:
18:6370da1de572
Child:
29:f71a0be59b99
V.01

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ampembeng 15:6f2798e45099 1 /*
ampembeng 15:6f2798e45099 2 * Copyright 2010-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
ampembeng 15:6f2798e45099 3 *
ampembeng 15:6f2798e45099 4 * Licensed under the Apache License, Version 2.0 (the "License").
ampembeng 15:6f2798e45099 5 * You may not use this file except in compliance with the License.
ampembeng 15:6f2798e45099 6 * A copy of the License is located at
ampembeng 15:6f2798e45099 7 *
ampembeng 15:6f2798e45099 8 * http://aws.amazon.com/apache2.0
ampembeng 15:6f2798e45099 9 *
ampembeng 15:6f2798e45099 10 * or in the "license" file accompanying this file. This file is distributed
ampembeng 15:6f2798e45099 11 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
ampembeng 15:6f2798e45099 12 * express or implied. See the License for the specific language governing
ampembeng 15:6f2798e45099 13 * permissions and limitations under the License.
ampembeng 15:6f2798e45099 14 */
ampembeng 15:6f2798e45099 15
ampembeng 15:6f2798e45099 16 #include <stdbool.h>
ampembeng 15:6f2798e45099 17 #include <string.h>
ampembeng 15:6f2798e45099 18
ampembeng 15:6f2798e45099 19 #include "aws_iot_config.h"
ampembeng 15:6f2798e45099 20 #include "aws_iot_error.h"
ampembeng 15:6f2798e45099 21 #include "aws_iot_log.h"
ampembeng 15:6f2798e45099 22 #include "network_interface.h"
ampembeng 15:6f2798e45099 23 #include "mbedtls/config.h"
ampembeng 15:6f2798e45099 24
ampembeng 15:6f2798e45099 25 #include "mbedtls/net.h"
ampembeng 15:6f2798e45099 26 #include "mbedtls/ssl.h"
ampembeng 15:6f2798e45099 27 #include "mbedtls/entropy.h"
ampembeng 15:6f2798e45099 28 #include "mbedtls/ctr_drbg.h"
ampembeng 15:6f2798e45099 29 #include "mbedtls/certs.h"
ampembeng 15:6f2798e45099 30 #include "mbedtls/x509.h"
ampembeng 15:6f2798e45099 31 #include "mbedtls/error.h"
ampembeng 15:6f2798e45099 32 #include "mbedtls/debug.h"
ampembeng 15:6f2798e45099 33 #include "mbedtls/timing.h"
ampembeng 15:6f2798e45099 34 #include "mbedtls/net_sockets.h"
ampembeng 15:6f2798e45099 35 #include "pem.h"
ampembeng 15:6f2798e45099 36
ampembeng 15:6f2798e45099 37 #include "platform.h"
ampembeng 15:6f2798e45099 38 #include "WNCTCPSocketConnection.h"
ampembeng 15:6f2798e45099 39
ampembeng 15:6f2798e45099 40 #ifdef USING_AVNET_SHIELD
ampembeng 15:6f2798e45099 41 // Used for BIO connections
ampembeng 15:6f2798e45099 42 extern WNCTCPSocketConnection* _tcpsocket;
ampembeng 15:6f2798e45099 43 #endif
ampembeng 15:6f2798e45099 44
ampembeng 18:6370da1de572 45 // SD File System
ampembeng 18:6370da1de572 46 #include "SDFileSystem.h"
ampembeng 18:6370da1de572 47
ampembeng 18:6370da1de572 48 // SD defines
ampembeng 18:6370da1de572 49 #define CERT_MAX_SIZE 4096
ampembeng 18:6370da1de572 50
ampembeng 18:6370da1de572 51 // SD file pointer/buffer
ampembeng 18:6370da1de572 52 FILE *fp;
ampembeng 18:6370da1de572 53 char fp_buffer[CERT_MAX_SIZE];
ampembeng 18:6370da1de572 54
ampembeng 18:6370da1de572 55 // From main.cpp
ampembeng 18:6370da1de572 56 extern char HostAddress[255];
ampembeng 18:6370da1de572 57 extern char MqttClientID[32];
ampembeng 18:6370da1de572 58 extern char ThingName[32];
ampembeng 18:6370da1de572 59 extern char PortString[4];
ampembeng 18:6370da1de572 60
ampembeng 15:6f2798e45099 61 /*
ampembeng 15:6f2798e45099 62 * This is a function to do further verification if needed on the cert received
ampembeng 15:6f2798e45099 63 */
ampembeng 15:6f2798e45099 64 static int myCertVerify(void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags) {
ampembeng 15:6f2798e45099 65 char buf[1024];
ampembeng 15:6f2798e45099 66 ((void) data);
ampembeng 15:6f2798e45099 67
ampembeng 15:6f2798e45099 68 DEBUG("\nVerify requested for (Depth %d):\n", depth);
ampembeng 15:6f2798e45099 69 mbedtls_x509_crt_info(buf, sizeof(buf) - 1, "", crt);
ampembeng 15:6f2798e45099 70 DEBUG("%s", buf);
ampembeng 15:6f2798e45099 71
ampembeng 15:6f2798e45099 72 if ((*flags) == 0) {
ampembeng 15:6f2798e45099 73 DEBUG(" This certificate has no flags\n");
ampembeng 15:6f2798e45099 74 } else {
ampembeng 15:6f2798e45099 75 DEBUG(buf, sizeof(buf), " ! ", *flags); DEBUG("%s\n", buf);
ampembeng 15:6f2798e45099 76 }
ampembeng 15:6f2798e45099 77
ampembeng 15:6f2798e45099 78 return (0);
ampembeng 15:6f2798e45099 79 }
ampembeng 15:6f2798e45099 80
ampembeng 15:6f2798e45099 81 static int ret = 0, i;
ampembeng 15:6f2798e45099 82 static mbedtls_entropy_context entropy;
ampembeng 15:6f2798e45099 83 static mbedtls_ctr_drbg_context ctr_drbg;
ampembeng 15:6f2798e45099 84 static mbedtls_ssl_context ssl;
ampembeng 15:6f2798e45099 85 static mbedtls_ssl_config conf;
ampembeng 15:6f2798e45099 86 static uint32_t flags;
ampembeng 15:6f2798e45099 87 static mbedtls_x509_crt cacert;
ampembeng 15:6f2798e45099 88 static mbedtls_x509_crt clicert;
ampembeng 15:6f2798e45099 89 static mbedtls_pk_context pkey;
ampembeng 15:6f2798e45099 90 static mbedtls_net_context server_fd;
ampembeng 15:6f2798e45099 91
ampembeng 18:6370da1de572 92 // Used to zero the given buffer
ampembeng 18:6370da1de572 93 static void mbedtls_zeroize( char *v, size_t n ) {
ampembeng 18:6370da1de572 94 volatile char *p = v; while( n-- ) *p++ = 0;
ampembeng 18:6370da1de572 95 }
ampembeng 18:6370da1de572 96
ampembeng 18:6370da1de572 97 // Parser sub function
ampembeng 18:6370da1de572 98 int mqtt_parse_sub(std::string *search_str, char *param, const char *str_to_find)
ampembeng 15:6f2798e45099 99 {
ampembeng 18:6370da1de572 100 int index_start, index_end;
ampembeng 18:6370da1de572 101 mbedtls_zeroize(param, strlen(param));
ampembeng 18:6370da1de572 102
ampembeng 18:6370da1de572 103 index_start = search_str->find(str_to_find);
ampembeng 18:6370da1de572 104 if (index_start < 0)
ampembeng 18:6370da1de572 105 return -1;
ampembeng 18:6370da1de572 106
ampembeng 18:6370da1de572 107 index_end = search_str->find("\n", index_start);
ampembeng 18:6370da1de572 108 if (index_end < 0)
ampembeng 18:6370da1de572 109 index_end = search_str->find("\0", index_start);
ampembeng 18:6370da1de572 110
ampembeng 18:6370da1de572 111 if (index_end < 0)
ampembeng 18:6370da1de572 112 return -1;
ampembeng 18:6370da1de572 113
ampembeng 18:6370da1de572 114 index_start += strlen(str_to_find);
ampembeng 18:6370da1de572 115 strcpy(param, search_str->substr(index_start, index_end-index_start-1).c_str());
ampembeng 18:6370da1de572 116
ampembeng 18:6370da1de572 117 return 0;
ampembeng 18:6370da1de572 118 }
ampembeng 18:6370da1de572 119
ampembeng 18:6370da1de572 120 // Read MQTT config info
ampembeng 18:6370da1de572 121 int mbedtls_mqtt_config_parse_file(ShadowParameters_t *sp, const char *path )
ampembeng 18:6370da1de572 122 {
ampembeng 18:6370da1de572 123 int ret, size;
ampembeng 18:6370da1de572 124 mbedtls_zeroize(fp_buffer, CERT_MAX_SIZE);
ampembeng 15:6f2798e45099 125
ampembeng 18:6370da1de572 126 INFO("...Reading MQTT data from SD");
ampembeng 18:6370da1de572 127 fp = fopen(path, "r");
ampembeng 18:6370da1de572 128 if (fp != NULL) {
ampembeng 18:6370da1de572 129 size = fread(fp_buffer, sizeof(char), CERT_MAX_SIZE, fp);
ampembeng 18:6370da1de572 130 DEBUG("...Number of data read: %d, text from file: %s", size, fp_buffer);
ampembeng 18:6370da1de572 131 fclose(fp);
ampembeng 18:6370da1de572 132 }
ampembeng 18:6370da1de572 133 else {
ampembeng 18:6370da1de572 134 ERROR("Could not open file: %s", path);
ampembeng 18:6370da1de572 135 return -1;
ampembeng 18:6370da1de572 136 }
ampembeng 18:6370da1de572 137
ampembeng 18:6370da1de572 138 std::string filestr(fp_buffer);
ampembeng 18:6370da1de572 139
ampembeng 18:6370da1de572 140 ret = mqtt_parse_sub(&filestr, HostAddress, "AWS_IOT_MQTT_HOST=");
ampembeng 18:6370da1de572 141 sp->pHost = HostAddress;
ampembeng 18:6370da1de572 142 INFO("...Host=%s", sp->pHost);
ampembeng 18:6370da1de572 143 if (ret < 0) {
ampembeng 18:6370da1de572 144 ERROR("Could not parse AWS_IOT_MQTT_HOST string.");
ampembeng 18:6370da1de572 145 return ret;
ampembeng 15:6f2798e45099 146 }
ampembeng 15:6f2798e45099 147
ampembeng 18:6370da1de572 148 ret = mqtt_parse_sub(&filestr, PortString, "AWS_IOT_MQTT_PORT=");
ampembeng 18:6370da1de572 149 sp->port = atoi(PortString);
ampembeng 18:6370da1de572 150 INFO("...Port=%d", sp->port);
ampembeng 18:6370da1de572 151 if (ret < 0) {
ampembeng 18:6370da1de572 152 ERROR("Could not parse AWS_IOT_MQTT_PORT string.");
ampembeng 18:6370da1de572 153 return ret;
ampembeng 18:6370da1de572 154 }
ampembeng 15:6f2798e45099 155
ampembeng 18:6370da1de572 156 ret = mqtt_parse_sub(&filestr, MqttClientID, "AWS_IOT_MQTT_CLIENT_ID=");
ampembeng 18:6370da1de572 157 sp->pMqttClientId = MqttClientID;
ampembeng 18:6370da1de572 158 INFO("...pMqttClientId=%s", sp->pMqttClientId);
ampembeng 18:6370da1de572 159 if (ret < 0) {
ampembeng 18:6370da1de572 160 ERROR("Could not parse AWS_IOT_MQTT_CLIENT_ID string.");
ampembeng 18:6370da1de572 161 return ret;
ampembeng 18:6370da1de572 162 }
ampembeng 18:6370da1de572 163
ampembeng 18:6370da1de572 164 ret = mqtt_parse_sub(&filestr, ThingName, "AWS_IOT_MY_THING_NAME=");
ampembeng 18:6370da1de572 165 sp->pMyThingName = ThingName;
ampembeng 18:6370da1de572 166 INFO("...pMyThingName=%s", sp->pMyThingName);
ampembeng 18:6370da1de572 167 if (ret < 0) {
ampembeng 18:6370da1de572 168 ERROR("Could not parse AWS_IOT_MY_THING_NAME string.");
ampembeng 18:6370da1de572 169 return ret;
ampembeng 15:6f2798e45099 170 }
ampembeng 15:6f2798e45099 171
ampembeng 18:6370da1de572 172 return( ret );
ampembeng 18:6370da1de572 173 }
ampembeng 15:6f2798e45099 174
ampembeng 18:6370da1de572 175 // Override function: Parses CRT from SD
ampembeng 15:6f2798e45099 176 int mbedtls_x509_crt_parse_file( mbedtls_x509_crt *chain, const char *path )
ampembeng 15:6f2798e45099 177 {
ampembeng 18:6370da1de572 178 int ret, size;
ampembeng 18:6370da1de572 179 mbedtls_zeroize(fp_buffer, CERT_MAX_SIZE);
ampembeng 18:6370da1de572 180
ampembeng 18:6370da1de572 181 INFO("...Reading CERT data from SD");
ampembeng 18:6370da1de572 182 fp = fopen(path, "r");
ampembeng 18:6370da1de572 183 if (fp != NULL) {
ampembeng 18:6370da1de572 184 size = fread(fp_buffer, sizeof(char), CERT_MAX_SIZE, fp);
ampembeng 18:6370da1de572 185 DEBUG("...Number of data read: %d, text from file: %s", size, fp_buffer);
ampembeng 18:6370da1de572 186 fclose(fp);
ampembeng 18:6370da1de572 187 }
ampembeng 18:6370da1de572 188 else {
ampembeng 18:6370da1de572 189 ERROR("Could not open file: %s", path);
ampembeng 18:6370da1de572 190 return -1;
ampembeng 18:6370da1de572 191 }
ampembeng 15:6f2798e45099 192
ampembeng 15:6f2798e45099 193 DEBUG("...CRT Parse");
ampembeng 18:6370da1de572 194 ret = mbedtls_x509_crt_parse( chain, (unsigned char *)fp_buffer, size+2);
ampembeng 18:6370da1de572 195
ampembeng 15:6f2798e45099 196 return( ret );
ampembeng 15:6f2798e45099 197 }
ampembeng 18:6370da1de572 198
ampembeng 18:6370da1de572 199 // Override function: Parses KEY from SD
ampembeng 15:6f2798e45099 200 int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
ampembeng 18:6370da1de572 201 const char *path, const char *pwd )
ampembeng 15:6f2798e45099 202 {
ampembeng 18:6370da1de572 203 int ret, size;
ampembeng 18:6370da1de572 204 mbedtls_zeroize(fp_buffer, CERT_MAX_SIZE);
ampembeng 15:6f2798e45099 205
ampembeng 18:6370da1de572 206 INFO("...Reading KEY data from SD");
ampembeng 18:6370da1de572 207 fp = fopen(path, "r");
ampembeng 18:6370da1de572 208 if (fp != NULL) {
ampembeng 18:6370da1de572 209 size = fread(fp_buffer, sizeof(char), CERT_MAX_SIZE, fp);
ampembeng 18:6370da1de572 210 DEBUG("...Number of data read: %d, text from file: %s", size, fp_buffer);
ampembeng 18:6370da1de572 211 fclose(fp);
ampembeng 18:6370da1de572 212 }
ampembeng 18:6370da1de572 213 else {
ampembeng 18:6370da1de572 214 ERROR("Could not open file: %s", path);
ampembeng 18:6370da1de572 215 return -1;
ampembeng 18:6370da1de572 216 }
ampembeng 15:6f2798e45099 217
ampembeng 15:6f2798e45099 218 DEBUG("...Key Parse");
ampembeng 15:6f2798e45099 219 if( pwd == NULL ) {
ampembeng 15:6f2798e45099 220 DEBUG("...Using PWD");
ampembeng 18:6370da1de572 221 ret = mbedtls_pk_parse_key( ctx, (unsigned char *)fp_buffer, size+1, NULL, 0 );
ampembeng 15:6f2798e45099 222 }
ampembeng 15:6f2798e45099 223 else {
ampembeng 15:6f2798e45099 224 DEBUG("...No PWD");
ampembeng 18:6370da1de572 225 ret = mbedtls_pk_parse_key( ctx, (unsigned char *)fp_buffer, size+1, (const unsigned char *) pwd, strlen( pwd ) );
ampembeng 15:6f2798e45099 226 }
ampembeng 18:6370da1de572 227
ampembeng 15:6f2798e45099 228 return( ret );
ampembeng 15:6f2798e45099 229 }
ampembeng 18:6370da1de572 230
ampembeng 15:6f2798e45099 231
ampembeng 15:6f2798e45099 232 /* personalization string for the drbg */
ampembeng 15:6f2798e45099 233 const char *DRBG_PERS = "mbed TLS helloword client";
ampembeng 15:6f2798e45099 234
ampembeng 15:6f2798e45099 235 int iot_tls_init(Network *pNetwork) {
ampembeng 15:6f2798e45099 236 IoT_Error_t ret_val = NONE_ERROR;
ampembeng 15:6f2798e45099 237 const char *pers = "aws_iot_tls_wrapper";
ampembeng 15:6f2798e45099 238 unsigned char buf[MBEDTLS_SSL_MAX_CONTENT_LEN + 1];
ampembeng 15:6f2798e45099 239
ampembeng 15:6f2798e45099 240 mbedtls_net_init(&server_fd);
ampembeng 15:6f2798e45099 241 mbedtls_ssl_init(&ssl);
ampembeng 15:6f2798e45099 242 mbedtls_ssl_config_init(&conf);
ampembeng 15:6f2798e45099 243 mbedtls_ctr_drbg_init(&ctr_drbg);
ampembeng 15:6f2798e45099 244 mbedtls_x509_crt_init(&cacert);
ampembeng 15:6f2798e45099 245 mbedtls_x509_crt_init(&clicert);
ampembeng 15:6f2798e45099 246 mbedtls_pk_init(&pkey);
ampembeng 15:6f2798e45099 247
ampembeng 15:6f2798e45099 248 DEBUG("...Seeding the random number generator");
ampembeng 15:6f2798e45099 249 mbedtls_entropy_init(&entropy);
ampembeng 15:6f2798e45099 250 if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, (const unsigned char *) DRBG_PERS, sizeof (DRBG_PERS))) != 0) {
ampembeng 15:6f2798e45099 251 ERROR(" failed\n ! mbedtls_ctr_drbg_seed returned -0x%x\n", -ret);
ampembeng 15:6f2798e45099 252 return ret_val;
ampembeng 15:6f2798e45099 253 }
ampembeng 15:6f2798e45099 254 DEBUG(" ok\n");
ampembeng 15:6f2798e45099 255
ampembeng 15:6f2798e45099 256 pNetwork->my_socket = 0;
ampembeng 15:6f2798e45099 257 pNetwork->connect = iot_tls_connect;
ampembeng 15:6f2798e45099 258 pNetwork->mqttread = iot_tls_read;
ampembeng 15:6f2798e45099 259 pNetwork->mqttwrite = iot_tls_write;
ampembeng 15:6f2798e45099 260 pNetwork->disconnect = iot_tls_disconnect;
ampembeng 15:6f2798e45099 261 pNetwork->isConnected = iot_tls_is_connected;
ampembeng 15:6f2798e45099 262 pNetwork->destroy = iot_tls_destroy;
ampembeng 15:6f2798e45099 263
ampembeng 15:6f2798e45099 264 return ret_val;
ampembeng 15:6f2798e45099 265 }
ampembeng 15:6f2798e45099 266
ampembeng 15:6f2798e45099 267 int iot_tls_is_connected(Network *pNetwork) {
ampembeng 15:6f2798e45099 268 /* Use this to add implementation which can check for physical layer disconnect */
ampembeng 15:6f2798e45099 269 return 1;
ampembeng 15:6f2798e45099 270 }
ampembeng 15:6f2798e45099 271
ampembeng 15:6f2798e45099 272 int iot_tls_connect(Network *pNetwork, TLSConnectParams params) {
ampembeng 15:6f2798e45099 273 const char *pers = "aws_iot_tls_wrapper";
ampembeng 15:6f2798e45099 274
ampembeng 15:6f2798e45099 275 DEBUG("...Loading the CA root certificate");
ampembeng 18:6370da1de572 276 #ifdef USING_SD_CARD
ampembeng 18:6370da1de572 277 ret = mbedtls_x509_crt_parse_file(&cacert, AWS_IOT_ROOT_CA_FILENAME);
ampembeng 18:6370da1de572 278 #else
jilee 28:54d9a550adf1 279 ret = mbedtls_x509_crt_parse(&cacert, (const unsigned char *)AWS_IOT_ROOT_CA, AWS_IOT_ROOT_CA_LENGTH);
jilee 28:54d9a550adf1 280 //ret = mbedtls_x509_crt_parse(&cacert, (const unsigned char *)AWS_IOT_ROOT_CA, 1239);
jilee 28:54d9a550adf1 281 //ret = mbedtls_x509_crt_parse(&cacert, (const unsigned char *)AWS_IOT_ROOT_CA, strlen ((const char *)AWS_IOT_ROOT_CA)+1);
ampembeng 18:6370da1de572 282 #endif
ampembeng 15:6f2798e45099 283 if (ret < 0) {
jilee 28:54d9a550adf1 284 ERROR(" failed\n ! mbedtls_x509_crt_parse for root returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 285 return ret;
ampembeng 15:6f2798e45099 286 }
ampembeng 15:6f2798e45099 287 DEBUG(" ok (%d skipped)", ret);
ampembeng 15:6f2798e45099 288
ampembeng 15:6f2798e45099 289
ampembeng 15:6f2798e45099 290 DEBUG("...Loading the client cert");
ampembeng 18:6370da1de572 291 #ifdef USING_SD_CARD
ampembeng 18:6370da1de572 292 ret = mbedtls_x509_crt_parse_file(&clicert, AWS_IOT_CERTIFICATE_FILENAME);
ampembeng 18:6370da1de572 293 #else
jilee 28:54d9a550adf1 294 ret = mbedtls_x509_crt_parse(&clicert, (const unsigned char *)AWS_IOT_CERTIFICATE, AWS_IOT_CERTIFICATE_LENGTH);
jilee 28:54d9a550adf1 295 //ret = mbedtls_x509_crt_parse(&clicert, (const unsigned char *)AWS_IOT_CERTIFICATE, 862);
jilee 28:54d9a550adf1 296 //ret = mbedtls_x509_crt_parse(&clicert, (const unsigned char *)AWS_IOT_CERTIFICATE, strlen ((const char *)AWS_IOT_CERTIFICATE)+1);
ampembeng 18:6370da1de572 297 #endif
ampembeng 15:6f2798e45099 298 if (ret != 0) {
jilee 28:54d9a550adf1 299 ERROR(" failed\n ! mbedtls_x509_crt_parse IOT returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 300 return ret;
ampembeng 15:6f2798e45099 301 }
ampembeng 15:6f2798e45099 302 DEBUG(" ok");
ampembeng 15:6f2798e45099 303
ampembeng 15:6f2798e45099 304 DEBUG("...Loading the client key");
ampembeng 18:6370da1de572 305 #ifdef USING_SD_CARD
ampembeng 18:6370da1de572 306 ret = mbedtls_pk_parse_keyfile(&pkey, AWS_IOT_PRIVATE_KEY_FILENAME, "");
ampembeng 18:6370da1de572 307 #else
jilee 28:54d9a550adf1 308 ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *)AWS_IOT_PRIVATE_KEY, AWS_IOT_PRIVATE_KEY_LENGTH, NULL, 0 );
jilee 28:54d9a550adf1 309 //ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *)AWS_IOT_PRIVATE_KEY, 1191, NULL, 0 );
jilee 28:54d9a550adf1 310 //ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *)AWS_IOT_PRIVATE_KEY, strlen ((const char *)AWS_IOT_PRIVATE_KEY)+1, NULL, 0 );
ampembeng 18:6370da1de572 311 #endif
ampembeng 15:6f2798e45099 312 if (ret != 0) {
ampembeng 15:6f2798e45099 313 ERROR(" failed\n ! mbedtls_pk_parse_key returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 314 return ret;
ampembeng 15:6f2798e45099 315 }
ampembeng 15:6f2798e45099 316 DEBUG(" ok");
ampembeng 15:6f2798e45099 317
ampembeng 15:6f2798e45099 318 char portBuffer[6];
ampembeng 15:6f2798e45099 319 sprintf(portBuffer, "%d", params.DestinationPort);
ampembeng 15:6f2798e45099 320 DEBUG("...Connecting to %s/%s", params.pDestinationURL, portBuffer);
ampembeng 15:6f2798e45099 321 if ((ret = mbedtls_net_connect(&server_fd, params.pDestinationURL, portBuffer, MBEDTLS_NET_PROTO_TCP)) != 0) {
ampembeng 15:6f2798e45099 322 ERROR(" failed\n ! mbedtls_net_connect returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 323 return ret;
ampembeng 15:6f2798e45099 324 }
ampembeng 15:6f2798e45099 325
ampembeng 15:6f2798e45099 326
ampembeng 15:6f2798e45099 327 ret = mbedtls_net_set_block(&server_fd);
ampembeng 15:6f2798e45099 328 if (ret != 0) {
ampembeng 15:6f2798e45099 329 ERROR(" failed\n ! net_set_(non)block() returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 330 return ret;
ampembeng 15:6f2798e45099 331 }
ampembeng 15:6f2798e45099 332 DEBUG(" ok");
ampembeng 15:6f2798e45099 333
ampembeng 15:6f2798e45099 334
ampembeng 15:6f2798e45099 335 DEBUG("...Setting up the SSL/TLS structure");
ampembeng 15:6f2798e45099 336 if ((ret = mbedtls_ssl_config_defaults(&conf, MBEDTLS_SSL_IS_CLIENT, MBEDTLS_SSL_TRANSPORT_STREAM,
ampembeng 15:6f2798e45099 337 MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
ampembeng 15:6f2798e45099 338 ERROR(" failed\n ! mbedtls_ssl_config_defaults returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 339 return ret;
ampembeng 15:6f2798e45099 340 }
ampembeng 15:6f2798e45099 341
ampembeng 15:6f2798e45099 342
ampembeng 15:6f2798e45099 343 mbedtls_ssl_conf_verify(&conf, myCertVerify, NULL);
ampembeng 15:6f2798e45099 344 if (params.ServerVerificationFlag == true) {
ampembeng 15:6f2798e45099 345 mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_REQUIRED);
ampembeng 15:6f2798e45099 346 } else {
ampembeng 15:6f2798e45099 347 mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
ampembeng 15:6f2798e45099 348 }
ampembeng 15:6f2798e45099 349 mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
ampembeng 15:6f2798e45099 350
ampembeng 15:6f2798e45099 351 mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
ampembeng 15:6f2798e45099 352 if ((ret = mbedtls_ssl_conf_own_cert(&conf, &clicert, &pkey)) != 0) {
ampembeng 15:6f2798e45099 353 ERROR(" failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret);
ampembeng 15:6f2798e45099 354 return ret;
ampembeng 15:6f2798e45099 355 }
ampembeng 15:6f2798e45099 356
ampembeng 15:6f2798e45099 357 mbedtls_ssl_conf_read_timeout(&conf, params.timeout_ms);
ampembeng 15:6f2798e45099 358
ampembeng 15:6f2798e45099 359 if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
ampembeng 15:6f2798e45099 360 ERROR(" failed\n ! mbedtls_ssl_setup returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 361 return ret;
ampembeng 15:6f2798e45099 362 }
ampembeng 15:6f2798e45099 363 if ((ret = mbedtls_ssl_set_hostname(&ssl, params.pDestinationURL)) != 0) {
ampembeng 15:6f2798e45099 364 ERROR(" failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret);
ampembeng 15:6f2798e45099 365 return ret;
ampembeng 15:6f2798e45099 366 }
ampembeng 15:6f2798e45099 367
ampembeng 15:6f2798e45099 368 DEBUG("...Set Socket I/O Functions");
ampembeng 15:6f2798e45099 369 mbedtls_ssl_set_bio(&ssl, static_cast<void *>(_tcpsocket), mbedtls_net_send, NULL, mbedtls_net_recv_timeout );
ampembeng 15:6f2798e45099 370 DEBUG(" ok");
ampembeng 15:6f2798e45099 371
ampembeng 15:6f2798e45099 372
ampembeng 15:6f2798e45099 373 DEBUG("...Performing the SSL/TLS handshake");
ampembeng 15:6f2798e45099 374 while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
ampembeng 15:6f2798e45099 375 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
ampembeng 15:6f2798e45099 376 ERROR(" failed\n ! mbedtls_ssl_handshake returned -0x%x\n", -ret);
ampembeng 15:6f2798e45099 377 if (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED) {
ampembeng 15:6f2798e45099 378 ERROR(" Unable to verify the server's certificate. "
ampembeng 15:6f2798e45099 379 "Either it is invalid,\n"
ampembeng 15:6f2798e45099 380 " or you didn't set ca_file or ca_path "
ampembeng 15:6f2798e45099 381 "to an appropriate value.\n"
ampembeng 15:6f2798e45099 382 " Alternatively, you may want to use "
ampembeng 15:6f2798e45099 383 "auth_mode=optional for testing purposes.\n");
ampembeng 15:6f2798e45099 384 }
ampembeng 15:6f2798e45099 385 return ret;
ampembeng 15:6f2798e45099 386 }
ampembeng 15:6f2798e45099 387 }
ampembeng 15:6f2798e45099 388
ampembeng 15:6f2798e45099 389
ampembeng 15:6f2798e45099 390 DEBUG(" ok\n [ Protocol is %s ]\n [ Ciphersuite is %s ]\n", mbedtls_ssl_get_version(&ssl), mbedtls_ssl_get_ciphersuite(&ssl));
ampembeng 15:6f2798e45099 391 if ((ret = mbedtls_ssl_get_record_expansion(&ssl)) >= 0) {
ampembeng 15:6f2798e45099 392 DEBUG(" [ Record expansion is %d ]\n", ret);
ampembeng 15:6f2798e45099 393 } else {
ampembeng 15:6f2798e45099 394 DEBUG(" [ Record expansion is unknown (compression) ]\n");
ampembeng 15:6f2798e45099 395 }
ampembeng 15:6f2798e45099 396
ampembeng 15:6f2798e45099 397
ampembeng 15:6f2798e45099 398 DEBUG("...Verifying peer X.509 certificate");
ampembeng 15:6f2798e45099 399 if (params.ServerVerificationFlag == true) {
ampembeng 15:6f2798e45099 400 if ((flags = mbedtls_ssl_get_verify_result(&ssl)) != 0) {
ampembeng 15:6f2798e45099 401 char vrfy_buf[512];
ampembeng 15:6f2798e45099 402 ERROR(" failed\n");
ampembeng 15:6f2798e45099 403 mbedtls_x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), " ! ", flags);
ampembeng 15:6f2798e45099 404 ERROR("%s\n", vrfy_buf);
ampembeng 15:6f2798e45099 405 } else {
ampembeng 15:6f2798e45099 406 DEBUG(" ok\n");
ampembeng 15:6f2798e45099 407 ret = NONE_ERROR;
ampembeng 15:6f2798e45099 408 }
ampembeng 15:6f2798e45099 409 } else {
ampembeng 15:6f2798e45099 410 DEBUG(" Server Verification skipped\n");
ampembeng 15:6f2798e45099 411 ret = NONE_ERROR;
ampembeng 15:6f2798e45099 412 }
ampembeng 15:6f2798e45099 413
ampembeng 15:6f2798e45099 414
ampembeng 15:6f2798e45099 415 DEBUG("...SSL get peer cert");
ampembeng 15:6f2798e45099 416 if (mbedtls_ssl_get_peer_cert(&ssl) != NULL) {
ampembeng 15:6f2798e45099 417 DEBUG("...Peer certificate information");
ampembeng 15:6f2798e45099 418 const uint32_t buf_size = 1024;
ampembeng 15:6f2798e45099 419 char *buf = new char[buf_size];
ampembeng 15:6f2798e45099 420 mbedtls_x509_crt_info(buf, buf_size, " ", mbedtls_ssl_get_peer_cert(&ssl));
ampembeng 15:6f2798e45099 421 DEBUG("...Server certificate:\r\n%s\r", buf);
ampembeng 15:6f2798e45099 422 }
ampembeng 15:6f2798e45099 423
ampembeng 15:6f2798e45099 424 mbedtls_ssl_conf_read_timeout(&conf, 10);
ampembeng 15:6f2798e45099 425
ampembeng 15:6f2798e45099 426 return ret;
ampembeng 15:6f2798e45099 427 }
ampembeng 15:6f2798e45099 428
ampembeng 15:6f2798e45099 429 int iot_tls_write(Network *pNetwork, unsigned char *pMsg, int len, int timeout_ms) {
ampembeng 15:6f2798e45099 430
ampembeng 15:6f2798e45099 431 int written;
ampembeng 15:6f2798e45099 432 int frags;
ampembeng 15:6f2798e45099 433
ampembeng 15:6f2798e45099 434 for (written = 0, frags = 0; written < len; written += ret, frags++) {
ampembeng 15:6f2798e45099 435 while ((ret = mbedtls_ssl_write(&ssl, pMsg + written, len - written)) <= 0) {
ampembeng 15:6f2798e45099 436 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
ampembeng 15:6f2798e45099 437 ERROR(" failed\n ! mbedtls_ssl_write returned -0x%x\n\n", -ret);
ampembeng 15:6f2798e45099 438 return ret;
ampembeng 15:6f2798e45099 439 }
ampembeng 15:6f2798e45099 440 }
ampembeng 15:6f2798e45099 441 }
ampembeng 15:6f2798e45099 442
ampembeng 15:6f2798e45099 443 return written;
ampembeng 15:6f2798e45099 444 }
ampembeng 15:6f2798e45099 445
ampembeng 15:6f2798e45099 446 int iot_tls_read(Network *pNetwork, unsigned char *pMsg, int len, int timeout_ms) {
ampembeng 15:6f2798e45099 447 int rxLen = 0;
ampembeng 15:6f2798e45099 448 bool isErrorFlag = false;
ampembeng 15:6f2798e45099 449 bool isCompleteFlag = false;
ampembeng 15:6f2798e45099 450
ampembeng 15:6f2798e45099 451 // TODO check this against base
ampembeng 15:6f2798e45099 452 //mbedtls_ssl_conf_read_timeout(&conf, timeout_ms);
ampembeng 15:6f2798e45099 453
ampembeng 15:6f2798e45099 454 do {
ampembeng 15:6f2798e45099 455 ret = mbedtls_ssl_read(&ssl, pMsg, len);
ampembeng 15:6f2798e45099 456 if (ret > 0) {
ampembeng 15:6f2798e45099 457 rxLen += ret;
ampembeng 15:6f2798e45099 458 } else if (ret != MBEDTLS_ERR_SSL_WANT_READ) {
ampembeng 15:6f2798e45099 459 isErrorFlag = true;
ampembeng 15:6f2798e45099 460 }
ampembeng 15:6f2798e45099 461 if (rxLen >= len) {
ampembeng 15:6f2798e45099 462 isCompleteFlag = true;
ampembeng 15:6f2798e45099 463 }
ampembeng 15:6f2798e45099 464 } while (!isErrorFlag && !isCompleteFlag);
ampembeng 15:6f2798e45099 465
ampembeng 15:6f2798e45099 466 return ret;
ampembeng 15:6f2798e45099 467 }
ampembeng 15:6f2798e45099 468
ampembeng 15:6f2798e45099 469 void iot_tls_disconnect(Network *pNetwork) {
ampembeng 15:6f2798e45099 470 do {
ampembeng 15:6f2798e45099 471 ret = mbedtls_ssl_close_notify(&ssl);
ampembeng 15:6f2798e45099 472 } while (ret == MBEDTLS_ERR_SSL_WANT_WRITE);
ampembeng 15:6f2798e45099 473 }
ampembeng 15:6f2798e45099 474
ampembeng 15:6f2798e45099 475 int iot_tls_destroy(Network *pNetwork) {
ampembeng 15:6f2798e45099 476
ampembeng 15:6f2798e45099 477 mbedtls_net_free(&server_fd);
ampembeng 15:6f2798e45099 478
ampembeng 15:6f2798e45099 479 mbedtls_x509_crt_free(&clicert);
ampembeng 15:6f2798e45099 480 mbedtls_x509_crt_free(&cacert);
ampembeng 15:6f2798e45099 481 mbedtls_pk_free(&pkey);
ampembeng 15:6f2798e45099 482 mbedtls_ssl_free(&ssl);
ampembeng 15:6f2798e45099 483 mbedtls_ssl_config_free(&conf);
ampembeng 15:6f2798e45099 484 mbedtls_ctr_drbg_free(&ctr_drbg);
ampembeng 15:6f2798e45099 485 mbedtls_entropy_free(&entropy);
ampembeng 15:6f2798e45099 486
ampembeng 15:6f2798e45099 487 return 0;
ampembeng 15:6f2798e45099 488 }
ampembeng 15:6f2798e45099 489
ampembeng 15:6f2798e45099 490