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source/tls_socket.h@28:9a04ed79d67e, 2018-03-27 (annotated)

Committer:
Jan Jongboom
Date:
Tue Mar 27 11:07:02 2018 +0200
Revision:
28:9a04ed79d67e
Parent:
27:42b319540a74 
Merge default

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Jan Jongboom 13:992d953ecfb9 1 /*
Jan Jongboom 13:992d953ecfb9 2 * PackageLicenseDeclared: Apache-2.0
Jan Jongboom 13:992d953ecfb9 3 * Copyright (c) 2017 ARM Limited
Jan Jongboom 13:992d953ecfb9 4 *
Jan Jongboom 13:992d953ecfb9 5 * Licensed under the Apache License, Version 2.0 (the "License");
Jan Jongboom 13:992d953ecfb9 6 * you may not use this file except in compliance with the License.
Jan Jongboom 13:992d953ecfb9 7 * You may obtain a copy of the License at
Jan Jongboom 13:992d953ecfb9 8 *
Jan Jongboom 13:992d953ecfb9 9 * http://www.apache.org/licenses/LICENSE-2.0
Jan Jongboom 13:992d953ecfb9 10 *
Jan Jongboom 13:992d953ecfb9 11 * Unless required by applicable law or agreed to in writing, software
Jan Jongboom 13:992d953ecfb9 12 * distributed under the License is distributed on an "AS IS" BASIS,
Jan Jongboom 13:992d953ecfb9 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Jan Jongboom 13:992d953ecfb9 14 * See the License for the specific language governing permissions and
Jan Jongboom 13:992d953ecfb9 15 * limitations under the License.
Jan Jongboom 13:992d953ecfb9 16 */
Jan Jongboom 13:992d953ecfb9 17
Jan Jongboom 13:992d953ecfb9 18 #ifndef _MBED_HTTPS_TLS_SOCKET_H_
Jan Jongboom 13:992d953ecfb9 19 #define _MBED_HTTPS_TLS_SOCKET_H_
Jan Jongboom 13:992d953ecfb9 20
Jan Jongboom 13:992d953ecfb9 21 /* Change to a number between 1 and 4 to debug the TLS connection */
Jan Jongboom 13:992d953ecfb9 22 #define DEBUG_LEVEL 0
Jan Jongboom 13:992d953ecfb9 23
Jan Jongboom 13:992d953ecfb9 24 #include <string>
Jan Jongboom 13:992d953ecfb9 25 #include <vector>
Jan Jongboom 13:992d953ecfb9 26 #include <map>
Jan Jongboom 27:42b319540a74 27 #include "TCPSocket.h"
Jan Jongboom 13:992d953ecfb9 28 #include "http_parser.h"
Jan Jongboom 13:992d953ecfb9 29 #include "http_response.h"
Jan Jongboom 13:992d953ecfb9 30 #include "http_request_builder.h"
Jan Jongboom 15:ffc77f212382 31 #include "http_request_parser.h"
Jan Jongboom 13:992d953ecfb9 32 #include "http_parsed_url.h"
Jan Jongboom 13:992d953ecfb9 33
Jan Jongboom 13:992d953ecfb9 34 #include "mbedtls/platform.h"
Jan Jongboom 13:992d953ecfb9 35 #include "mbedtls/ssl.h"
Jan Jongboom 13:992d953ecfb9 36 #include "mbedtls/entropy.h"
Jan Jongboom 13:992d953ecfb9 37 #include "mbedtls/ctr_drbg.h"
Jan Jongboom 13:992d953ecfb9 38 #include "mbedtls/error.h"
Jan Jongboom 13:992d953ecfb9 39
Jan Jongboom 13:992d953ecfb9 40 #if DEBUG_LEVEL > 0
Jan Jongboom 13:992d953ecfb9 41 #include "mbedtls/debug.h"
Jan Jongboom 13:992d953ecfb9 42 #endif
Jan Jongboom 13:992d953ecfb9 43
Jan Jongboom 13:992d953ecfb9 44 /**
Jan Jongboom 13:992d953ecfb9 45 * \brief TLSSocket a wrapper around TCPSocket for interacting with TLS servers
Jan Jongboom 13:992d953ecfb9 46 */
Jan Jongboom 13:992d953ecfb9 47 class TLSSocket {
Jan Jongboom 13:992d953ecfb9 48 public:
Jan Jongboom 13:992d953ecfb9 49 TLSSocket(NetworkInterface* net_iface, const char* hostname, uint16_t port, const char* ssl_ca_pem) {
Jan Jongboom 13:992d953ecfb9 50 _tcpsocket = new TCPSocket(net_iface);
Jan Jongboom 13:992d953ecfb9 51 _ssl_ca_pem = ssl_ca_pem;
Jan Jongboom 13:992d953ecfb9 52 _is_connected = false;
Jan Jongboom 13:992d953ecfb9 53 _debug = false;
Jan Jongboom 13:992d953ecfb9 54 _hostname = hostname;
Jan Jongboom 13:992d953ecfb9 55 _port = port;
Jan Jongboom 13:992d953ecfb9 56 _error = 0;
Jan Jongboom 13:992d953ecfb9 57
Jan Jongboom 13:992d953ecfb9 58 DRBG_PERS = "mbed TLS helloword client";
Jan Jongboom 13:992d953ecfb9 59
Jan Jongboom 13:992d953ecfb9 60 mbedtls_entropy_init(&_entropy);
Jan Jongboom 13:992d953ecfb9 61 mbedtls_ctr_drbg_init(&_ctr_drbg);
Jan Jongboom 13:992d953ecfb9 62 mbedtls_x509_crt_init(&_cacert);
Jan Jongboom 13:992d953ecfb9 63 mbedtls_ssl_init(&_ssl);
Jan Jongboom 13:992d953ecfb9 64 mbedtls_ssl_config_init(&_ssl_conf);
Jan Jongboom 13:992d953ecfb9 65 }
Jan Jongboom 13:992d953ecfb9 66
Jan Jongboom 13:992d953ecfb9 67 ~TLSSocket() {
Jan Jongboom 13:992d953ecfb9 68 mbedtls_entropy_free(&_entropy);
Jan Jongboom 13:992d953ecfb9 69 mbedtls_ctr_drbg_free(&_ctr_drbg);
Jan Jongboom 13:992d953ecfb9 70 mbedtls_x509_crt_free(&_cacert);
Jan Jongboom 13:992d953ecfb9 71 mbedtls_ssl_free(&_ssl);
Jan Jongboom 13:992d953ecfb9 72 mbedtls_ssl_config_free(&_ssl_conf);
Jan Jongboom 13:992d953ecfb9 73
Jan Jongboom 13:992d953ecfb9 74 if (_tcpsocket) {
Jan Jongboom 13:992d953ecfb9 75 _tcpsocket->close();
Jan Jongboom 13:992d953ecfb9 76 delete _tcpsocket;
Jan Jongboom 13:992d953ecfb9 77 }
Jan Jongboom 13:992d953ecfb9 78
Jan Jongboom 13:992d953ecfb9 79 // @todo: free DRBG_PERS ?
Jan Jongboom 13:992d953ecfb9 80 }
Jan Jongboom 13:992d953ecfb9 81
Jan Jongboom 13:992d953ecfb9 82 nsapi_error_t connect() {
Jan Jongboom 13:992d953ecfb9 83 /* Initialize the flags */
Jan Jongboom 13:992d953ecfb9 84 /*
Jan Jongboom 13:992d953ecfb9 85 * Initialize TLS-related stuf.
Jan Jongboom 13:992d953ecfb9 86 */
Jan Jongboom 13:992d953ecfb9 87 int ret;
Jan Jongboom 13:992d953ecfb9 88 if ((ret = mbedtls_ctr_drbg_seed(&_ctr_drbg, mbedtls_entropy_func, &_entropy,
Jan Jongboom 13:992d953ecfb9 89 (const unsigned char *) DRBG_PERS,
Jan Jongboom 13:992d953ecfb9 90 sizeof (DRBG_PERS))) != 0) {
Jan Jongboom 13:992d953ecfb9 91 print_mbedtls_error("mbedtls_crt_drbg_init", ret);
Jan Jongboom 13:992d953ecfb9 92 _error = ret;
Jan Jongboom 13:992d953ecfb9 93 return _error;
Jan Jongboom 13:992d953ecfb9 94 }
Jan Jongboom 13:992d953ecfb9 95
Jan Jongboom 13:992d953ecfb9 96 if ((ret = mbedtls_x509_crt_parse(&_cacert, (const unsigned char *)_ssl_ca_pem,
Jan Jongboom 13:992d953ecfb9 97 strlen(_ssl_ca_pem) + 1)) != 0) {
Jan Jongboom 13:992d953ecfb9 98 print_mbedtls_error("mbedtls_x509_crt_parse", ret);
Jan Jongboom 13:992d953ecfb9 99 _error = ret;
Jan Jongboom 13:992d953ecfb9 100 return _error;
Jan Jongboom 13:992d953ecfb9 101 }
Jan Jongboom 13:992d953ecfb9 102
Jan Jongboom 13:992d953ecfb9 103 if ((ret = mbedtls_ssl_config_defaults(&_ssl_conf,
Jan Jongboom 13:992d953ecfb9 104 MBEDTLS_SSL_IS_CLIENT,
Jan Jongboom 13:992d953ecfb9 105 MBEDTLS_SSL_TRANSPORT_STREAM,
Jan Jongboom 13:992d953ecfb9 106 MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
Jan Jongboom 13:992d953ecfb9 107 print_mbedtls_error("mbedtls_ssl_config_defaults", ret);
Jan Jongboom 13:992d953ecfb9 108 _error = ret;
Jan Jongboom 13:992d953ecfb9 109 return _error;
Jan Jongboom 13:992d953ecfb9 110 }
Jan Jongboom 13:992d953ecfb9 111
Jan Jongboom 13:992d953ecfb9 112 mbedtls_ssl_conf_ca_chain(&_ssl_conf, &_cacert, NULL);
Jan Jongboom 13:992d953ecfb9 113 mbedtls_ssl_conf_rng(&_ssl_conf, mbedtls_ctr_drbg_random, &_ctr_drbg);
Jan Jongboom 13:992d953ecfb9 114
Jan Jongboom 13:992d953ecfb9 115 /* It is possible to disable authentication by passing
Jan Jongboom 13:992d953ecfb9 116 * MBEDTLS_SSL_VERIFY_NONE in the call to mbedtls_ssl_conf_authmode()
Jan Jongboom 13:992d953ecfb9 117 */
Jan Jongboom 13:992d953ecfb9 118 mbedtls_ssl_conf_authmode(&_ssl_conf, MBEDTLS_SSL_VERIFY_REQUIRED);
Jan Jongboom 13:992d953ecfb9 119
Jan Jongboom 13:992d953ecfb9 120 #if DEBUG_LEVEL > 0
Jan Jongboom 13:992d953ecfb9 121 mbedtls_ssl_conf_verify(&_ssl_conf, my_verify, NULL);
Jan Jongboom 13:992d953ecfb9 122 mbedtls_ssl_conf_dbg(&_ssl_conf, my_debug, NULL);
Jan Jongboom 13:992d953ecfb9 123 mbedtls_debug_set_threshold(DEBUG_LEVEL);
Jan Jongboom 13:992d953ecfb9 124 #endif
Jan Jongboom 13:992d953ecfb9 125
Jan Jongboom 13:992d953ecfb9 126 if ((ret = mbedtls_ssl_setup(&_ssl, &_ssl_conf)) != 0) {
Jan Jongboom 13:992d953ecfb9 127 print_mbedtls_error("mbedtls_ssl_setup", ret);
Jan Jongboom 13:992d953ecfb9 128 _error = ret;
Jan Jongboom 13:992d953ecfb9 129 return _error;
Jan Jongboom 13:992d953ecfb9 130 }
Jan Jongboom 13:992d953ecfb9 131
Jan Jongboom 13:992d953ecfb9 132 mbedtls_ssl_set_hostname(&_ssl, _hostname);
Jan Jongboom 13:992d953ecfb9 133
Jan Jongboom 13:992d953ecfb9 134 mbedtls_ssl_set_bio(&_ssl, static_cast<void *>(_tcpsocket),
Jan Jongboom 13:992d953ecfb9 135 ssl_send, ssl_recv, NULL );
Jan Jongboom 13:992d953ecfb9 136
Jan Jongboom 13:992d953ecfb9 137 /* Connect to the server */
Jan Jongboom 13:992d953ecfb9 138 if (_debug) mbedtls_printf("Connecting to %s:%d\r\n", _hostname, _port);
Jan Jongboom 13:992d953ecfb9 139 ret = _tcpsocket->connect(_hostname, _port);
Jan Jongboom 13:992d953ecfb9 140 if (ret != NSAPI_ERROR_OK) {
Jan Jongboom 13:992d953ecfb9 141 if (_debug) mbedtls_printf("Failed to connect\r\n");
Jan Jongboom 13:992d953ecfb9 142 onError(_tcpsocket, -1);
Jan Jongboom 13:992d953ecfb9 143 return _error;
Jan Jongboom 13:992d953ecfb9 144 }
Jan Jongboom 13:992d953ecfb9 145
Jan Jongboom 13:992d953ecfb9 146 /* Start the handshake, the rest will be done in onReceive() */
Jan Jongboom 13:992d953ecfb9 147 if (_debug) mbedtls_printf("Starting the TLS handshake...\r\n");
Jan Jongboom 13:992d953ecfb9 148 ret = mbedtls_ssl_handshake(&_ssl);
Jan Jongboom 13:992d953ecfb9 149 if (ret < 0) {
Jan Jongboom 13:992d953ecfb9 150 if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
Jan Jongboom 13:992d953ecfb9 151 ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
Jan Jongboom 13:992d953ecfb9 152 print_mbedtls_error("mbedtls_ssl_handshake", ret);
Jan Jongboom 13:992d953ecfb9 153 onError(_tcpsocket, -1);
Jan Jongboom 13:992d953ecfb9 154 }
Jan Jongboom 13:992d953ecfb9 155 else {
Jan Jongboom 13:992d953ecfb9 156 _error = ret;
Jan Jongboom 13:992d953ecfb9 157 }
Jan Jongboom 13:992d953ecfb9 158 return _error;
Jan Jongboom 13:992d953ecfb9 159 }
Jan Jongboom 13:992d953ecfb9 160
Jan Jongboom 13:992d953ecfb9 161 /* It also means the handshake is done, time to print info */
Jan Jongboom 13:992d953ecfb9 162 if (_debug) mbedtls_printf("TLS connection to %s:%d established\r\n", _hostname, _port);
Jan Jongboom 13:992d953ecfb9 163
Jan Jongboom 13:992d953ecfb9 164 const uint32_t buf_size = 1024;
Jan Jongboom 18:f7a85895a941 165 char buf[buf_size] = { 0 };
Jan Jongboom 13:992d953ecfb9 166 mbedtls_x509_crt_info(buf, buf_size, "\r ",
Jan Jongboom 13:992d953ecfb9 167 mbedtls_ssl_get_peer_cert(&_ssl));
Jan Jongboom 13:992d953ecfb9 168 if (_debug) mbedtls_printf("Server certificate:\r\n%s\r", buf);
Jan Jongboom 13:992d953ecfb9 169
Jan Jongboom 13:992d953ecfb9 170 uint32_t flags = mbedtls_ssl_get_verify_result(&_ssl);
Jan Jongboom 13:992d953ecfb9 171 if( flags != 0 )
Jan Jongboom 13:992d953ecfb9 172 {
Jan Jongboom 13:992d953ecfb9 173 mbedtls_x509_crt_verify_info(buf, buf_size, "\r ! ", flags);
Jan Jongboom 13:992d953ecfb9 174 if (_debug) mbedtls_printf("Certificate verification failed:\r\n%s\r\r\n", buf);
Jan Jongboom 13:992d953ecfb9 175 }
Jan Jongboom 13:992d953ecfb9 176 else {
Jan Jongboom 13:992d953ecfb9 177 if (_debug) mbedtls_printf("Certificate verification passed\r\n\r\n");
Jan Jongboom 13:992d953ecfb9 178 }
Jan Jongboom 13:992d953ecfb9 179
Jan Jongboom 13:992d953ecfb9 180 _is_connected = true;
Jan Jongboom 13:992d953ecfb9 181
Jan Jongboom 13:992d953ecfb9 182 return 0;
Jan Jongboom 13:992d953ecfb9 183 }
Jan Jongboom 13:992d953ecfb9 184
Jan Jongboom 13:992d953ecfb9 185 bool connected() {
Jan Jongboom 13:992d953ecfb9 186 return _is_connected;
Jan Jongboom 13:992d953ecfb9 187 }
Jan Jongboom 13:992d953ecfb9 188
Jan Jongboom 13:992d953ecfb9 189 nsapi_error_t error() {
Jan Jongboom 13:992d953ecfb9 190 return _error;
Jan Jongboom 13:992d953ecfb9 191 }
Jan Jongboom 13:992d953ecfb9 192
Jan Jongboom 13:992d953ecfb9 193 TCPSocket* get_tcp_socket() {
Jan Jongboom 13:992d953ecfb9 194 return _tcpsocket;
Jan Jongboom 13:992d953ecfb9 195 }
Jan Jongboom 13:992d953ecfb9 196
Jan Jongboom 13:992d953ecfb9 197 mbedtls_ssl_context* get_ssl_context() {
Jan Jongboom 13:992d953ecfb9 198 return &_ssl;
Jan Jongboom 13:992d953ecfb9 199 }
Jan Jongboom 13:992d953ecfb9 200
Jan Jongboom 13:992d953ecfb9 201 /**
Jan Jongboom 13:992d953ecfb9 202 * Set the debug flag.
Jan Jongboom 13:992d953ecfb9 203 *
Jan Jongboom 13:992d953ecfb9 204 * If this flag is set, debug information from mbed TLS will be logged to stdout.
Jan Jongboom 13:992d953ecfb9 205 */
Jan Jongboom 13:992d953ecfb9 206 void set_debug(bool debug) {
Jan Jongboom 13:992d953ecfb9 207 _debug = debug;
Jan Jongboom 13:992d953ecfb9 208 }
Jan Jongboom 13:992d953ecfb9 209
Jan Jongboom 13:992d953ecfb9 210 protected:
Jan Jongboom 13:992d953ecfb9 211 /**
Jan Jongboom 13:992d953ecfb9 212 * Helper for pretty-printing mbed TLS error codes
Jan Jongboom 13:992d953ecfb9 213 */
Jan Jongboom 13:992d953ecfb9 214 static void print_mbedtls_error(const char *name, int err) {
Jan Jongboom 13:992d953ecfb9 215 char buf[128];
Jan Jongboom 13:992d953ecfb9 216 mbedtls_strerror(err, buf, sizeof (buf));
Jan Jongboom 13:992d953ecfb9 217 mbedtls_printf("%s() failed: -0x%04x (%d): %s\r\n", name, -err, err, buf);
Jan Jongboom 13:992d953ecfb9 218 }
Jan Jongboom 13:992d953ecfb9 219
Jan Jongboom 13:992d953ecfb9 220 #if DEBUG_LEVEL > 0
Jan Jongboom 13:992d953ecfb9 221 /**
Jan Jongboom 13:992d953ecfb9 222 * Debug callback for mbed TLS
Jan Jongboom 13:992d953ecfb9 223 * Just prints on the USB serial port
Jan Jongboom 13:992d953ecfb9 224 */
Jan Jongboom 13:992d953ecfb9 225 static void my_debug(void *ctx, int level, const char *file, int line,
Jan Jongboom 13:992d953ecfb9 226 const char *str)
Jan Jongboom 13:992d953ecfb9 227 {
Jan Jongboom 13:992d953ecfb9 228 const char *p, *basename;
Jan Jongboom 13:992d953ecfb9 229 (void) ctx;
Jan Jongboom 13:992d953ecfb9 230
Jan Jongboom 13:992d953ecfb9 231 /* Extract basename from file */
Jan Jongboom 13:992d953ecfb9 232 for(p = basename = file; *p != '\0'; p++) {
Jan Jongboom 13:992d953ecfb9 233 if(*p == '/' || *p == '\\') {
Jan Jongboom 13:992d953ecfb9 234 basename = p + 1;
Jan Jongboom 13:992d953ecfb9 235 }
Jan Jongboom 13:992d953ecfb9 236 }
Jan Jongboom 13:992d953ecfb9 237
Jan Jongboom 13:992d953ecfb9 238 if (_debug) {
Jan Jongboom 13:992d953ecfb9 239 mbedtls_printf("%s:%04d: |%d| %s", basename, line, level, str);
Jan Jongboom 13:992d953ecfb9 240 }
Jan Jongboom 13:992d953ecfb9 241 }
Jan Jongboom 13:992d953ecfb9 242
Jan Jongboom 13:992d953ecfb9 243 /**
Jan Jongboom 13:992d953ecfb9 244 * Certificate verification callback for mbed TLS
Jan Jongboom 13:992d953ecfb9 245 * Here we only use it to display information on each cert in the chain
Jan Jongboom 13:992d953ecfb9 246 */
Jan Jongboom 13:992d953ecfb9 247 static int my_verify(void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags)
Jan Jongboom 13:992d953ecfb9 248 {
Jan Jongboom 13:992d953ecfb9 249 const uint32_t buf_size = 1024;
Jan Jongboom 13:992d953ecfb9 250 char *buf = new char[buf_size];
Jan Jongboom 13:992d953ecfb9 251 (void) data;
Jan Jongboom 13:992d953ecfb9 252
Jan Jongboom 13:992d953ecfb9 253 if (_debug) mbedtls_printf("\nVerifying certificate at depth %d:\n", depth);
Jan Jongboom 13:992d953ecfb9 254 mbedtls_x509_crt_info(buf, buf_size - 1, " ", crt);
Jan Jongboom 13:992d953ecfb9 255 if (_debug) mbedtls_printf("%s", buf);
Jan Jongboom 13:992d953ecfb9 256
Jan Jongboom 13:992d953ecfb9 257 if (*flags == 0)
Jan Jongboom 13:992d953ecfb9 258 if (_debug) mbedtls_printf("No verification issue for this certificate\n");
Jan Jongboom 13:992d953ecfb9 259 else
Jan Jongboom 13:992d953ecfb9 260 {
Jan Jongboom 13:992d953ecfb9 261 mbedtls_x509_crt_verify_info(buf, buf_size, " ! ", *flags);
Jan Jongboom 13:992d953ecfb9 262 if (_debug) mbedtls_printf("%s\n", buf);
Jan Jongboom 13:992d953ecfb9 263 }
Jan Jongboom 13:992d953ecfb9 264
Jan Jongboom 13:992d953ecfb9 265 delete[] buf;
Jan Jongboom 13:992d953ecfb9 266 return 0;
Jan Jongboom 13:992d953ecfb9 267 }
Jan Jongboom 13:992d953ecfb9 268 #endif
Jan Jongboom 13:992d953ecfb9 269
Jan Jongboom 13:992d953ecfb9 270 /**
Jan Jongboom 13:992d953ecfb9 271 * Receive callback for mbed TLS
Jan Jongboom 13:992d953ecfb9 272 */
Jan Jongboom 13:992d953ecfb9 273 static int ssl_recv(void *ctx, unsigned char *buf, size_t len) {
Jan Jongboom 13:992d953ecfb9 274 int recv = -1;
Jan Jongboom 13:992d953ecfb9 275 TCPSocket *socket = static_cast<TCPSocket *>(ctx);
Jan Jongboom 13:992d953ecfb9 276 recv = socket->recv(buf, len);
Jan Jongboom 13:992d953ecfb9 277
Jan Jongboom 13:992d953ecfb9 278 if (NSAPI_ERROR_WOULD_BLOCK == recv) {
Jan Jongboom 13:992d953ecfb9 279 return MBEDTLS_ERR_SSL_WANT_READ;
Jan Jongboom 13:992d953ecfb9 280 }
Jan Jongboom 13:992d953ecfb9 281 else if (recv < 0) {
Jan Jongboom 13:992d953ecfb9 282 return -1;
Jan Jongboom 13:992d953ecfb9 283 }
Jan Jongboom 13:992d953ecfb9 284 else {
Jan Jongboom 13:992d953ecfb9 285 return recv;
Jan Jongboom 13:992d953ecfb9 286 }
Jan Jongboom 13:992d953ecfb9 287 }
Jan Jongboom 13:992d953ecfb9 288
Jan Jongboom 13:992d953ecfb9 289 /**
Jan Jongboom 13:992d953ecfb9 290 * Send callback for mbed TLS
Jan Jongboom 13:992d953ecfb9 291 */
Jan Jongboom 13:992d953ecfb9 292 static int ssl_send(void *ctx, const unsigned char *buf, size_t len) {
Jan Jongboom 13:992d953ecfb9 293 int size = -1;
Jan Jongboom 13:992d953ecfb9 294 TCPSocket *socket = static_cast<TCPSocket *>(ctx);
Jan Jongboom 13:992d953ecfb9 295 size = socket->send(buf, len);
Jan Jongboom 13:992d953ecfb9 296
Jan Jongboom 13:992d953ecfb9 297 if(NSAPI_ERROR_WOULD_BLOCK == size) {
Jan Jongboom 13:992d953ecfb9 298 return len;
Jan Jongboom 13:992d953ecfb9 299 }
Jan Jongboom 13:992d953ecfb9 300 else if (size < 0){
Jan Jongboom 13:992d953ecfb9 301 return -1;
Jan Jongboom 13:992d953ecfb9 302 }
Jan Jongboom 13:992d953ecfb9 303 else {
Jan Jongboom 13:992d953ecfb9 304 return size;
Jan Jongboom 13:992d953ecfb9 305 }
Jan Jongboom 13:992d953ecfb9 306 }
Jan Jongboom 13:992d953ecfb9 307
Jan Jongboom 13:992d953ecfb9 308 private:
Jan Jongboom 13:992d953ecfb9 309 void onError(TCPSocket *s, int error) {
Jan Jongboom 13:992d953ecfb9 310 s->close();
Jan Jongboom 13:992d953ecfb9 311 _error = error;
Jan Jongboom 13:992d953ecfb9 312 }
Jan Jongboom 13:992d953ecfb9 313
Jan Jongboom 13:992d953ecfb9 314 TCPSocket* _tcpsocket;
Jan Jongboom 13:992d953ecfb9 315
Jan Jongboom 13:992d953ecfb9 316 const char* DRBG_PERS;
Jan Jongboom 13:992d953ecfb9 317 const char* _ssl_ca_pem;
Jan Jongboom 13:992d953ecfb9 318 const char* _hostname;
Jan Jongboom 13:992d953ecfb9 319 uint16_t _port;
Jan Jongboom 13:992d953ecfb9 320
Jan Jongboom 13:992d953ecfb9 321 bool _debug;
Jan Jongboom 13:992d953ecfb9 322 bool _is_connected;
Jan Jongboom 13:992d953ecfb9 323
Jan Jongboom 13:992d953ecfb9 324 nsapi_error_t _error;
Jan Jongboom 13:992d953ecfb9 325
Jan Jongboom 13:992d953ecfb9 326 mbedtls_entropy_context _entropy;
Jan Jongboom 13:992d953ecfb9 327 mbedtls_ctr_drbg_context _ctr_drbg;
Jan Jongboom 13:992d953ecfb9 328 mbedtls_x509_crt _cacert;
Jan Jongboom 13:992d953ecfb9 329 mbedtls_ssl_context _ssl;
Jan Jongboom 13:992d953ecfb9 330 mbedtls_ssl_config _ssl_conf;
Jan Jongboom 13:992d953ecfb9 331 };
Jan Jongboom 13:992d953ecfb9 332
Jan Jongboom 13:992d953ecfb9 333 #endif // _MBED_HTTPS_TLS_SOCKET_H_