Avnet / Mbed 2 deprecated WNCInterface_tls_client_example

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Dependencies:   WNCInterface mbed-rtos mbed

main.cpp@16:3bac55ad2049, 2016-11-02 (annotated)

Committer:
JMF
Date:
Wed Nov 02 19:20:20 2016 +0000
Revision:
16:3bac55ad2049
Parent:
13:1ae41c231014 
An example program showing how to perform HTTPS interactions.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Janos Follath 0:fc70c47eecb4 1 /*
Janos Follath 0:fc70c47eecb4 2 * Hello world example of a TLS client: fetch an HTTPS page
Janos Follath 0:fc70c47eecb4 3 *
Janos Follath 0:fc70c47eecb4 4 * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
Janos Follath 0:fc70c47eecb4 5 * SPDX-License-Identifier: Apache-2.0
Janos Follath 0:fc70c47eecb4 6 *
Janos Follath 0:fc70c47eecb4 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Janos Follath 0:fc70c47eecb4 8 * not use this file except in compliance with the License.
Janos Follath 0:fc70c47eecb4 9 * You may obtain a copy of the License at
Janos Follath 0:fc70c47eecb4 10 *
Janos Follath 0:fc70c47eecb4 11 * http://www.apache.org/licenses/LICENSE-2.0
Janos Follath 0:fc70c47eecb4 12 *
Janos Follath 0:fc70c47eecb4 13 * Unless required by applicable law or agreed to in writing, software
Janos Follath 0:fc70c47eecb4 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Janos Follath 0:fc70c47eecb4 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Janos Follath 0:fc70c47eecb4 16 * See the License for the specific language governing permissions and
Janos Follath 0:fc70c47eecb4 17 * limitations under the License.
Janos Follath 0:fc70c47eecb4 18 *
Janos Follath 0:fc70c47eecb4 19 * This file is part of mbed TLS (https://tls.mbed.org)
mbed_official 13:1ae41c231014 20 */
Janos Follath 0:fc70c47eecb4 21
Janos Follath 0:fc70c47eecb4 22 /** \file main.cpp
Janos Follath 0:fc70c47eecb4 23 * \brief An example TLS Client application
Janos Follath 0:fc70c47eecb4 24 * This application sends an HTTPS request to developer.mbed.org and searches for a string in
Janos Follath 0:fc70c47eecb4 25 * the result.
Janos Follath 0:fc70c47eecb4 26 *
Janos Follath 0:fc70c47eecb4 27 * This example is implemented as a logic class (HelloHTTPS) wrapping a TCP socket.
Janos Follath 0:fc70c47eecb4 28 * The logic class handles all events, leaving the main loop to just check if the process
Janos Follath 0:fc70c47eecb4 29 * has finished.
Janos Follath 0:fc70c47eecb4 30 */
Janos Follath 0:fc70c47eecb4 31
Janos Follath 0:fc70c47eecb4 32 /* Change to a number between 1 and 4 to debug the TLS connection */
Janos Follath 0:fc70c47eecb4 33 #define DEBUG_LEVEL 0
Janos Follath 0:fc70c47eecb4 34
Janos Follath 0:fc70c47eecb4 35 #include "mbed.h"
JMF 16:3bac55ad2049 36 //#include "NetworkStack.h"
Janos Follath 0:fc70c47eecb4 37
JMF 16:3bac55ad2049 38 #include "WNCInterface.h"
JMF 16:3bac55ad2049 39 #include "TCPSocketConnection.h"
Janos Follath 0:fc70c47eecb4 40
Janos Follath 0:fc70c47eecb4 41 #include "mbedtls/platform.h"
Janos Follath 0:fc70c47eecb4 42 #include "mbedtls/ssl.h"
Janos Follath 0:fc70c47eecb4 43 #include "mbedtls/entropy.h"
Janos Follath 0:fc70c47eecb4 44 #include "mbedtls/ctr_drbg.h"
Janos Follath 0:fc70c47eecb4 45 #include "mbedtls/error.h"
mbed_official 13:1ae41c231014 46
JMF 16:3bac55ad2049 47 #define CRLF "\r\n"
JMF 16:3bac55ad2049 48
Janos Follath 0:fc70c47eecb4 49 #if DEBUG_LEVEL > 0
Janos Follath 0:fc70c47eecb4 50 #include "mbedtls/debug.h"
Janos Follath 0:fc70c47eecb4 51 #endif
Janos Follath 0:fc70c47eecb4 52
Janos Follath 0:fc70c47eecb4 53 namespace {
Janos Follath 0:fc70c47eecb4 54
Janos Follath 0:fc70c47eecb4 55 const char *HTTPS_SERVER_NAME = "developer.mbed.org";
Janos Follath 0:fc70c47eecb4 56 const int HTTPS_SERVER_PORT = 443;
Janos Follath 0:fc70c47eecb4 57 const int RECV_BUFFER_SIZE = 600;
Janos Follath 0:fc70c47eecb4 58
Janos Follath 0:fc70c47eecb4 59 const char HTTPS_PATH[] = "/media/uploads/mbed_official/hello.txt";
JMF 16:3bac55ad2049 60 //const size_t HTTPS_PATH_LEN = sizeof(HTTPS_PATH) - 1;
Janos Follath 0:fc70c47eecb4 61
Janos Follath 0:fc70c47eecb4 62 /* Test related data */
Janos Follath 0:fc70c47eecb4 63 const char *HTTPS_OK_STR = "200 OK";
Janos Follath 0:fc70c47eecb4 64 const char *HTTPS_HELLO_STR = "Hello world!";
Janos Follath 0:fc70c47eecb4 65
Janos Follath 0:fc70c47eecb4 66 /* personalization string for the drbg */
Janos Follath 0:fc70c47eecb4 67 const char *DRBG_PERS = "mbed TLS helloword client";
Janos Follath 0:fc70c47eecb4 68
Janos Follath 0:fc70c47eecb4 69 /* List of trusted root CA certificates
Janos Follath 0:fc70c47eecb4 70 * currently only GlobalSign, the CA for developer.mbed.org
Janos Follath 0:fc70c47eecb4 71 *
Janos Follath 0:fc70c47eecb4 72 * To add more than one root, just concatenate them.
Janos Follath 0:fc70c47eecb4 73 */
mbed_official 13:1ae41c231014 74 const char SSL_CA_PEM[] = "-----BEGIN CERTIFICATE-----\n"
mbed_official 13:1ae41c231014 75 "MIIDdTCCAl2gAwIBAgILBAAAAAABFUtaw5QwDQYJKoZIhvcNAQEFBQAwVzELMAkG\n"
mbed_official 13:1ae41c231014 76 "A1UEBhMCQkUxGTAXBgNVBAoTEEdsb2JhbFNpZ24gbnYtc2ExEDAOBgNVBAsTB1Jv\n"
mbed_official 13:1ae41c231014 77 "b3QgQ0ExGzAZBgNVBAMTEkdsb2JhbFNpZ24gUm9vdCBDQTAeFw05ODA5MDExMjAw\n"
mbed_official 13:1ae41c231014 78 "MDBaFw0yODAxMjgxMjAwMDBaMFcxCzAJBgNVBAYTAkJFMRkwFwYDVQQKExBHbG9i\n"
mbed_official 13:1ae41c231014 79 "YWxTaWduIG52LXNhMRAwDgYDVQQLEwdSb290IENBMRswGQYDVQQDExJHbG9iYWxT\n"
mbed_official 13:1ae41c231014 80 "aWduIFJvb3QgQ0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDaDuaZ\n"
mbed_official 13:1ae41c231014 81 "jc6j40+Kfvvxi4Mla+pIH/EqsLmVEQS98GPR4mdmzxzdzxtIK+6NiY6arymAZavp\n"
mbed_official 13:1ae41c231014 82 "xy0Sy6scTHAHoT0KMM0VjU/43dSMUBUc71DuxC73/OlS8pF94G3VNTCOXkNz8kHp\n"
mbed_official 13:1ae41c231014 83 "1Wrjsok6Vjk4bwY8iGlbKk3Fp1S4bInMm/k8yuX9ifUSPJJ4ltbcdG6TRGHRjcdG\n"
mbed_official 13:1ae41c231014 84 "snUOhugZitVtbNV4FpWi6cgKOOvyJBNPc1STE4U6G7weNLWLBYy5d4ux2x8gkasJ\n"
mbed_official 13:1ae41c231014 85 "U26Qzns3dLlwR5EiUWMWea6xrkEmCMgZK9FGqkjWZCrXgzT/LCrBbBlDSgeF59N8\n"
mbed_official 13:1ae41c231014 86 "9iFo7+ryUp9/k5DPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMBAf8E\n"
mbed_official 13:1ae41c231014 87 "BTADAQH/MB0GA1UdDgQWBBRge2YaRQ2XyolQL30EzTSo//z9SzANBgkqhkiG9w0B\n"
mbed_official 13:1ae41c231014 88 "AQUFAAOCAQEA1nPnfE920I2/7LqivjTFKDK1fPxsnCwrvQmeU79rXqoRSLblCKOz\n"
mbed_official 13:1ae41c231014 89 "yj1hTdNGCbM+w6DjY1Ub8rrvrTnhQ7k4o+YviiY776BQVvnGCv04zcQLcFGUl5gE\n"
mbed_official 13:1ae41c231014 90 "38NflNUVyRRBnMRddWQVDf9VMOyGj/8N7yy5Y0b2qvzfvGn9LhJIZJrglfCm7ymP\n"
mbed_official 13:1ae41c231014 91 "AbEVtQwdpf5pLGkkeB6zpxxxYu7KyJesF12KwvhHhm4qxFYxldBniYUr+WymXUad\n"
mbed_official 13:1ae41c231014 92 "DKqC5JlR3XC321Y9YeRq4VzW9v493kHMB65jUr9TU/Qr6cf9tveCX4XSQRjbgbME\n"
mbed_official 13:1ae41c231014 93 "HMUfpIBvFSDJ3gyICh3WZlXi/EjJKSZp4A==\n"
mbed_official 13:1ae41c231014 94 "-----END CERTIFICATE-----\n";
Janos Follath 0:fc70c47eecb4 95
Janos Follath 0:fc70c47eecb4 96 }
Janos Follath 0:fc70c47eecb4 97
Janos Follath 0:fc70c47eecb4 98 /**
Janos Follath 0:fc70c47eecb4 99 * \brief HelloHTTPS implements the logic for fetching a file from a webserver
Janos Follath 0:fc70c47eecb4 100 * using a TCP socket and parsing the result.
Janos Follath 0:fc70c47eecb4 101 */
Janos Follath 0:fc70c47eecb4 102 class HelloHTTPS {
Janos Follath 0:fc70c47eecb4 103 public:
Janos Follath 0:fc70c47eecb4 104 /**
Janos Follath 0:fc70c47eecb4 105 * HelloHTTPS Constructor
Janos Follath 0:fc70c47eecb4 106 * Initializes the TCP socket, sets up event handlers and flags.
Janos Follath 0:fc70c47eecb4 107 *
Janos Follath 0:fc70c47eecb4 108 * @param[in] domain The domain name to fetch from
Janos Follath 0:fc70c47eecb4 109 * @param[in] port The port of the HTTPS server
Janos Follath 0:fc70c47eecb4 110 */
JMF 16:3bac55ad2049 111 HelloHTTPS(const char * domain, const uint16_t port, WNCInterface *net_iface) :
Janos Follath 0:fc70c47eecb4 112 _domain(domain), _port(port)
Janos Follath 0:fc70c47eecb4 113 {
Janos Follath 0:fc70c47eecb4 114
Janos Follath 0:fc70c47eecb4 115 _error = false;
Janos Follath 0:fc70c47eecb4 116 _gothello = false;
Janos Follath 0:fc70c47eecb4 117 _got200 = false;
Janos Follath 0:fc70c47eecb4 118 _bpos = 0;
Janos Follath 0:fc70c47eecb4 119 _request_sent = 0;
JMF 16:3bac55ad2049 120 _tcpsocket = new TCPSocketConnection;
Janos Follath 0:fc70c47eecb4 121
Janos Follath 0:fc70c47eecb4 122 mbedtls_entropy_init(&_entropy);
Janos Follath 0:fc70c47eecb4 123 mbedtls_ctr_drbg_init(&_ctr_drbg);
Janos Follath 0:fc70c47eecb4 124 mbedtls_x509_crt_init(&_cacert);
Janos Follath 0:fc70c47eecb4 125 mbedtls_ssl_init(&_ssl);
Janos Follath 0:fc70c47eecb4 126 mbedtls_ssl_config_init(&_ssl_conf);
Janos Follath 0:fc70c47eecb4 127 }
Janos Follath 0:fc70c47eecb4 128 /**
Janos Follath 0:fc70c47eecb4 129 * HelloHTTPS Desctructor
Janos Follath 0:fc70c47eecb4 130 */
Janos Follath 0:fc70c47eecb4 131 ~HelloHTTPS() {
Janos Follath 0:fc70c47eecb4 132 mbedtls_entropy_free(&_entropy);
Janos Follath 0:fc70c47eecb4 133 mbedtls_ctr_drbg_free(&_ctr_drbg);
Janos Follath 0:fc70c47eecb4 134 mbedtls_x509_crt_free(&_cacert);
Janos Follath 0:fc70c47eecb4 135 mbedtls_ssl_free(&_ssl);
Janos Follath 0:fc70c47eecb4 136 mbedtls_ssl_config_free(&_ssl_conf);
Janos Follath 0:fc70c47eecb4 137 }
Janos Follath 0:fc70c47eecb4 138 /**
Janos Follath 0:fc70c47eecb4 139 * Start the test.
Janos Follath 0:fc70c47eecb4 140 *
Janos Follath 0:fc70c47eecb4 141 * Starts by clearing test flags, then resolves the address with DNS.
Janos Follath 0:fc70c47eecb4 142 *
Janos Follath 0:fc70c47eecb4 143 * @param[in] path The path of the file to fetch from the HTTPS server
Janos Follath 0:fc70c47eecb4 144 * @return SOCKET_ERROR_NONE on success, or an error code on failure
Janos Follath 0:fc70c47eecb4 145 */
Janos Follath 0:fc70c47eecb4 146 void startTest(const char *path) {
Janos Follath 0:fc70c47eecb4 147 /* Initialize the flags */
Janos Follath 0:fc70c47eecb4 148 _got200 = false;
Janos Follath 0:fc70c47eecb4 149 _gothello = false;
Janos Follath 0:fc70c47eecb4 150 _error = false;
Janos Follath 0:fc70c47eecb4 151 _disconnected = false;
Janos Follath 0:fc70c47eecb4 152 _request_sent = false;
Janos Follath 0:fc70c47eecb4 153 /* Fill the request buffer */
Janos Follath 0:fc70c47eecb4 154 _bpos = snprintf(_buffer, sizeof(_buffer) - 1, "GET %s HTTP/1.1\nHost: %s\n\n", path, HTTPS_SERVER_NAME);
Janos Follath 0:fc70c47eecb4 155
Janos Follath 0:fc70c47eecb4 156 /*
Janos Follath 0:fc70c47eecb4 157 * Initialize TLS-related stuf.
Janos Follath 0:fc70c47eecb4 158 */
Janos Follath 0:fc70c47eecb4 159 int ret;
Janos Follath 0:fc70c47eecb4 160 if ((ret = mbedtls_ctr_drbg_seed(&_ctr_drbg, mbedtls_entropy_func, &_entropy,
Janos Follath 0:fc70c47eecb4 161 (const unsigned char *) DRBG_PERS,
Janos Follath 0:fc70c47eecb4 162 sizeof (DRBG_PERS))) != 0) {
Janos Follath 0:fc70c47eecb4 163 print_mbedtls_error("mbedtls_crt_drbg_init", ret);
Janos Follath 0:fc70c47eecb4 164 _error = true;
Janos Follath 0:fc70c47eecb4 165 return;
Janos Follath 0:fc70c47eecb4 166 }
Janos Follath 0:fc70c47eecb4 167
Janos Follath 0:fc70c47eecb4 168 if ((ret = mbedtls_x509_crt_parse(&_cacert, (const unsigned char *) SSL_CA_PEM,
Janos Follath 0:fc70c47eecb4 169 sizeof (SSL_CA_PEM))) != 0) {
Janos Follath 0:fc70c47eecb4 170 print_mbedtls_error("mbedtls_x509_crt_parse", ret);
Janos Follath 0:fc70c47eecb4 171 _error = true;
Janos Follath 0:fc70c47eecb4 172 return;
Janos Follath 0:fc70c47eecb4 173 }
Janos Follath 0:fc70c47eecb4 174
Janos Follath 0:fc70c47eecb4 175 if ((ret = mbedtls_ssl_config_defaults(&_ssl_conf,
Janos Follath 0:fc70c47eecb4 176 MBEDTLS_SSL_IS_CLIENT,
Janos Follath 0:fc70c47eecb4 177 MBEDTLS_SSL_TRANSPORT_STREAM,
Janos Follath 0:fc70c47eecb4 178 MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
Janos Follath 0:fc70c47eecb4 179 print_mbedtls_error("mbedtls_ssl_config_defaults", ret);
Janos Follath 0:fc70c47eecb4 180 _error = true;
Janos Follath 0:fc70c47eecb4 181 return;
Janos Follath 0:fc70c47eecb4 182 }
Janos Follath 0:fc70c47eecb4 183
Janos Follath 0:fc70c47eecb4 184 mbedtls_ssl_conf_ca_chain(&_ssl_conf, &_cacert, NULL);
Janos Follath 0:fc70c47eecb4 185 mbedtls_ssl_conf_rng(&_ssl_conf, mbedtls_ctr_drbg_random, &_ctr_drbg);
Janos Follath 0:fc70c47eecb4 186
mbed_official 13:1ae41c231014 187 /* It is possible to disable authentication by passing
mbed_official 13:1ae41c231014 188 * MBEDTLS_SSL_VERIFY_NONE in the call to mbedtls_ssl_conf_authmode()
mbed_official 13:1ae41c231014 189 */
mbed_official 13:1ae41c231014 190 mbedtls_ssl_conf_authmode(&_ssl_conf, MBEDTLS_SSL_VERIFY_REQUIRED);
Janos Follath 0:fc70c47eecb4 191
Janos Follath 0:fc70c47eecb4 192 #if DEBUG_LEVEL > 0
Janos Follath 0:fc70c47eecb4 193 mbedtls_ssl_conf_verify(&_ssl_conf, my_verify, NULL);
Janos Follath 0:fc70c47eecb4 194 mbedtls_ssl_conf_dbg(&_ssl_conf, my_debug, NULL);
Janos Follath 0:fc70c47eecb4 195 mbedtls_debug_set_threshold(DEBUG_LEVEL);
Janos Follath 0:fc70c47eecb4 196 #endif
Janos Follath 0:fc70c47eecb4 197
Janos Follath 0:fc70c47eecb4 198 if ((ret = mbedtls_ssl_setup(&_ssl, &_ssl_conf)) != 0) {
Janos Follath 0:fc70c47eecb4 199 print_mbedtls_error("mbedtls_ssl_setup", ret);
Janos Follath 0:fc70c47eecb4 200 _error = true;
Janos Follath 0:fc70c47eecb4 201 return;
Janos Follath 0:fc70c47eecb4 202 }
Janos Follath 0:fc70c47eecb4 203
Janos Follath 0:fc70c47eecb4 204 mbedtls_ssl_set_hostname(&_ssl, HTTPS_SERVER_NAME);
Janos Follath 0:fc70c47eecb4 205
Janos Follath 0:fc70c47eecb4 206 mbedtls_ssl_set_bio(&_ssl, static_cast<void *>(_tcpsocket),
Janos Follath 0:fc70c47eecb4 207 ssl_send, ssl_recv, NULL );
Janos Follath 0:fc70c47eecb4 208
Janos Follath 0:fc70c47eecb4 209
Janos Follath 0:fc70c47eecb4 210 /* Connect to the server */
Janos Follath 0:fc70c47eecb4 211 mbedtls_printf("Connecting with %s\r\n", _domain);
mbed_official 13:1ae41c231014 212 ret = _tcpsocket->connect(_domain, _port);
JMF 16:3bac55ad2049 213 _tcpsocket->set_blocking (false,1500);
JMF 16:3bac55ad2049 214
Janos Follath 0:fc70c47eecb4 215 /* Start the handshake, the rest will be done in onReceive() */
Janos Follath 0:fc70c47eecb4 216 mbedtls_printf("Starting the TLS handshake...\r\n");
Janos Follath 0:fc70c47eecb4 217 ret = mbedtls_ssl_handshake(&_ssl);
Janos Follath 0:fc70c47eecb4 218 if (ret < 0) {
Janos Follath 0:fc70c47eecb4 219 if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
Janos Follath 0:fc70c47eecb4 220 ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
Janos Follath 0:fc70c47eecb4 221 print_mbedtls_error("mbedtls_ssl_handshake", ret);
Janos Follath 0:fc70c47eecb4 222 onError(_tcpsocket, -1 );
Janos Follath 0:fc70c47eecb4 223 }
Janos Follath 0:fc70c47eecb4 224 return;
Janos Follath 0:fc70c47eecb4 225 }
Janos Follath 0:fc70c47eecb4 226
Janos Follath 0:fc70c47eecb4 227 ret = mbedtls_ssl_write(&_ssl, (const unsigned char *) _buffer, _bpos);
Janos Follath 0:fc70c47eecb4 228 if (ret < 0) {
Janos Follath 0:fc70c47eecb4 229 if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
Janos Follath 0:fc70c47eecb4 230 ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
Janos Follath 0:fc70c47eecb4 231 print_mbedtls_error("mbedtls_ssl_write", ret);
Janos Follath 0:fc70c47eecb4 232 onError(_tcpsocket, -1 );
Janos Follath 0:fc70c47eecb4 233 }
Janos Follath 0:fc70c47eecb4 234 return;
Janos Follath 0:fc70c47eecb4 235 }
Janos Follath 0:fc70c47eecb4 236
Janos Follath 0:fc70c47eecb4 237 /* It also means the handshake is done, time to print info */
JMF 16:3bac55ad2049 238 mbedtls_printf("TLS connection to %s established\r\n", HTTPS_SERVER_NAME);
Janos Follath 0:fc70c47eecb4 239
mbed_official 9:1ac74f2d7bda 240 const uint32_t buf_size = 1024;
mbed_official 9:1ac74f2d7bda 241 char *buf = new char[buf_size];
mbed_official 9:1ac74f2d7bda 242 mbedtls_x509_crt_info(buf, buf_size, "\r ",
Janos Follath 0:fc70c47eecb4 243 mbedtls_ssl_get_peer_cert(&_ssl));
Janos Follath 0:fc70c47eecb4 244 mbedtls_printf("Server certificate:\r\n%s\r", buf);
Janos Follath 0:fc70c47eecb4 245
Janos Follath 0:fc70c47eecb4 246 uint32_t flags = mbedtls_ssl_get_verify_result(&_ssl);
Janos Follath 0:fc70c47eecb4 247 if( flags != 0 )
Janos Follath 0:fc70c47eecb4 248 {
mbed_official 9:1ac74f2d7bda 249 mbedtls_x509_crt_verify_info(buf, buf_size, "\r ! ", flags);
JMF 16:3bac55ad2049 250 mbedtls_printf("Certificate verification failed:\r\n%s\r\r\n", buf);
Janos Follath 0:fc70c47eecb4 251 }
Janos Follath 0:fc70c47eecb4 252 else
JMF 16:3bac55ad2049 253 mbedtls_printf("Certificate verification passed\r\n\r\n");
Janos Follath 0:fc70c47eecb4 254
Janos Follath 0:fc70c47eecb4 255
Janos Follath 0:fc70c47eecb4 256 /* Read data out of the socket */
Janos Follath 0:fc70c47eecb4 257 ret = mbedtls_ssl_read(&_ssl, (unsigned char *) _buffer, sizeof(_buffer));
Janos Follath 0:fc70c47eecb4 258 if (ret < 0) {
Janos Follath 0:fc70c47eecb4 259 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
Janos Follath 0:fc70c47eecb4 260 print_mbedtls_error("mbedtls_ssl_read", ret);
Janos Follath 0:fc70c47eecb4 261 onError(_tcpsocket, -1 );
Janos Follath 0:fc70c47eecb4 262 }
mbed_official 9:1ac74f2d7bda 263 delete[] buf;
Janos Follath 0:fc70c47eecb4 264 return;
Janos Follath 0:fc70c47eecb4 265 }
Janos Follath 0:fc70c47eecb4 266 _bpos = static_cast<size_t>(ret);
Janos Follath 0:fc70c47eecb4 267
Janos Follath 0:fc70c47eecb4 268 _buffer[_bpos] = 0;
Janos Follath 0:fc70c47eecb4 269
Janos Follath 0:fc70c47eecb4 270 /* Check each of the flags */
Janos Follath 0:fc70c47eecb4 271 _got200 = _got200 || strstr(_buffer, HTTPS_OK_STR) != NULL;
Janos Follath 0:fc70c47eecb4 272 _gothello = _gothello || strstr(_buffer, HTTPS_HELLO_STR) != NULL;
Janos Follath 0:fc70c47eecb4 273
Janos Follath 0:fc70c47eecb4 274 /* Print status messages */
Janos Follath 0:fc70c47eecb4 275 mbedtls_printf("HTTPS: Received %d chars from server\r\n", _bpos);
Janos Follath 0:fc70c47eecb4 276 mbedtls_printf("HTTPS: Received 200 OK status ... %s\r\n", _got200 ? "[OK]" : "[FAIL]");
Janos Follath 0:fc70c47eecb4 277 mbedtls_printf("HTTPS: Received '%s' status ... %s\r\n", HTTPS_HELLO_STR, _gothello ? "[OK]" : "[FAIL]");
Janos Follath 0:fc70c47eecb4 278 mbedtls_printf("HTTPS: Received message:\r\n\r\n");
Janos Follath 0:fc70c47eecb4 279 mbedtls_printf("%s", _buffer);
Janos Follath 0:fc70c47eecb4 280 _error = !(_got200 && _gothello);
Janos Follath 0:fc70c47eecb4 281
Janos Follath 0:fc70c47eecb4 282 _tcpsocket->close();
mbed_official 9:1ac74f2d7bda 283 delete[] buf;
Janos Follath 0:fc70c47eecb4 284 }
Janos Follath 0:fc70c47eecb4 285 protected:
Janos Follath 0:fc70c47eecb4 286 /**
Janos Follath 0:fc70c47eecb4 287 * Helper for pretty-printing mbed TLS error codes
Janos Follath 0:fc70c47eecb4 288 */
Janos Follath 0:fc70c47eecb4 289 static void print_mbedtls_error(const char *name, int err) {
Janos Follath 0:fc70c47eecb4 290 char buf[128];
Janos Follath 0:fc70c47eecb4 291 mbedtls_strerror(err, buf, sizeof (buf));
Janos Follath 0:fc70c47eecb4 292 mbedtls_printf("%s() failed: -0x%04x (%d): %s\r\n", name, -err, err, buf);
Janos Follath 0:fc70c47eecb4 293 }
Janos Follath 0:fc70c47eecb4 294
Janos Follath 0:fc70c47eecb4 295 #if DEBUG_LEVEL > 0
Janos Follath 0:fc70c47eecb4 296 /**
Janos Follath 0:fc70c47eecb4 297 * Debug callback for mbed TLS
Janos Follath 0:fc70c47eecb4 298 * Just prints on the USB serial port
Janos Follath 0:fc70c47eecb4 299 */
Janos Follath 0:fc70c47eecb4 300 static void my_debug(void *ctx, int level, const char *file, int line,
Janos Follath 0:fc70c47eecb4 301 const char *str)
Janos Follath 0:fc70c47eecb4 302 {
Janos Follath 0:fc70c47eecb4 303 const char *p, *basename;
Janos Follath 0:fc70c47eecb4 304 (void) ctx;
Janos Follath 0:fc70c47eecb4 305
Janos Follath 0:fc70c47eecb4 306 /* Extract basename from file */
Janos Follath 0:fc70c47eecb4 307 for(p = basename = file; *p != '\0'; p++) {
Janos Follath 0:fc70c47eecb4 308 if(*p == '/' || *p == '\\') {
Janos Follath 0:fc70c47eecb4 309 basename = p + 1;
Janos Follath 0:fc70c47eecb4 310 }
Janos Follath 0:fc70c47eecb4 311 }
Janos Follath 0:fc70c47eecb4 312
Janos Follath 0:fc70c47eecb4 313 mbedtls_printf("%s:%04d: |%d| %s", basename, line, level, str);
Janos Follath 0:fc70c47eecb4 314 }
Janos Follath 0:fc70c47eecb4 315
Janos Follath 0:fc70c47eecb4 316 /**
Janos Follath 0:fc70c47eecb4 317 * Certificate verification callback for mbed TLS
Janos Follath 0:fc70c47eecb4 318 * Here we only use it to display information on each cert in the chain
Janos Follath 0:fc70c47eecb4 319 */
Janos Follath 0:fc70c47eecb4 320 static int my_verify(void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags)
Janos Follath 0:fc70c47eecb4 321 {
mbed_official 9:1ac74f2d7bda 322 const uint32_t buf_size = 1024;
mbed_official 9:1ac74f2d7bda 323 char *buf = new char[buf_size];
Janos Follath 0:fc70c47eecb4 324 (void) data;
Janos Follath 0:fc70c47eecb4 325
Janos Follath 0:fc70c47eecb4 326 mbedtls_printf("\nVerifying certificate at depth %d:\n", depth);
mbed_official 9:1ac74f2d7bda 327 mbedtls_x509_crt_info(buf, buf_size - 1, " ", crt);
Janos Follath 0:fc70c47eecb4 328 mbedtls_printf("%s", buf);
Janos Follath 0:fc70c47eecb4 329
Janos Follath 0:fc70c47eecb4 330 if (*flags == 0)
Janos Follath 0:fc70c47eecb4 331 mbedtls_printf("No verification issue for this certificate\n");
Janos Follath 0:fc70c47eecb4 332 else
Janos Follath 0:fc70c47eecb4 333 {
mbed_official 9:1ac74f2d7bda 334 mbedtls_x509_crt_verify_info(buf, buf_size, " ! ", *flags);
Janos Follath 0:fc70c47eecb4 335 mbedtls_printf("%s\n", buf);
Janos Follath 0:fc70c47eecb4 336 }
Janos Follath 0:fc70c47eecb4 337
mbed_official 9:1ac74f2d7bda 338 delete[] buf;
Janos Follath 0:fc70c47eecb4 339 return 0;
Janos Follath 0:fc70c47eecb4 340 }
Janos Follath 0:fc70c47eecb4 341 #endif
Janos Follath 0:fc70c47eecb4 342
Janos Follath 0:fc70c47eecb4 343 /**
Janos Follath 0:fc70c47eecb4 344 * Receive callback for mbed TLS
Janos Follath 0:fc70c47eecb4 345 */
Janos Follath 0:fc70c47eecb4 346 static int ssl_recv(void *ctx, unsigned char *buf, size_t len) {
JMF 16:3bac55ad2049 347 TCPSocketConnection *socket = static_cast<TCPSocketConnection *>(ctx);
JMF 16:3bac55ad2049 348 return (int)socket->receive((char*)buf, len);
Janos Follath 0:fc70c47eecb4 349 }
Janos Follath 0:fc70c47eecb4 350
Janos Follath 0:fc70c47eecb4 351 /**
Janos Follath 0:fc70c47eecb4 352 * Send callback for mbed TLS
Janos Follath 0:fc70c47eecb4 353 */
Janos Follath 0:fc70c47eecb4 354 static int ssl_send(void *ctx, const unsigned char *buf, size_t len) {
JMF 16:3bac55ad2049 355 TCPSocketConnection *socket = static_cast<TCPSocketConnection *>(ctx);
JMF 16:3bac55ad2049 356 return socket->send((char*)buf, len);
Janos Follath 0:fc70c47eecb4 357 }
Janos Follath 0:fc70c47eecb4 358
JMF 16:3bac55ad2049 359 void onError(TCPSocketConnection *s, int error) {
JMF 16:3bac55ad2049 360 mbedtls_printf("MBED: Socket Error: %d\r\n", error);
Janos Follath 0:fc70c47eecb4 361 s->close();
Janos Follath 0:fc70c47eecb4 362 _error = true;
Janos Follath 0:fc70c47eecb4 363 }
Janos Follath 0:fc70c47eecb4 364
Janos Follath 0:fc70c47eecb4 365 protected:
JMF 16:3bac55ad2049 366 TCPSocketConnection* _tcpsocket;
Janos Follath 0:fc70c47eecb4 367
Janos Follath 0:fc70c47eecb4 368 const char *_domain; /**< The domain name of the HTTPS server */
Janos Follath 0:fc70c47eecb4 369 const uint16_t _port; /**< The HTTPS server port */
Janos Follath 0:fc70c47eecb4 370 char _buffer[RECV_BUFFER_SIZE]; /**< The response buffer */
Janos Follath 0:fc70c47eecb4 371 size_t _bpos; /**< The current offset in the response buffer */
Janos Follath 0:fc70c47eecb4 372 volatile bool _got200; /**< Status flag for HTTPS 200 */
Janos Follath 0:fc70c47eecb4 373 volatile bool _gothello; /**< Status flag for finding the test string */
Janos Follath 0:fc70c47eecb4 374 volatile bool _error; /**< Status flag for an error */
Janos Follath 0:fc70c47eecb4 375 volatile bool _disconnected;
Janos Follath 0:fc70c47eecb4 376 volatile bool _request_sent;
Janos Follath 0:fc70c47eecb4 377
Janos Follath 0:fc70c47eecb4 378 mbedtls_entropy_context _entropy;
Janos Follath 0:fc70c47eecb4 379 mbedtls_ctr_drbg_context _ctr_drbg;
Janos Follath 0:fc70c47eecb4 380 mbedtls_x509_crt _cacert;
Janos Follath 0:fc70c47eecb4 381 mbedtls_ssl_context _ssl;
Janos Follath 0:fc70c47eecb4 382 mbedtls_ssl_config _ssl_conf;
Janos Follath 0:fc70c47eecb4 383 };
Janos Follath 0:fc70c47eecb4 384
JMF 16:3bac55ad2049 385 MODSERIAL pc(USBTX,USBRX,256,256);
JMF 16:3bac55ad2049 386
JMF 16:3bac55ad2049 387 #ifdef __cplusplus
JMF 16:3bac55ad2049 388 extern "C" {
JMF 16:3bac55ad2049 389 #endif
JMF 16:3bac55ad2049 390
JMF 16:3bac55ad2049 391 int myprintf( const char* format, ... ) {
JMF 16:3bac55ad2049 392 extern MODSERIAL pc;
JMF 16:3bac55ad2049 393 string buff;
JMF 16:3bac55ad2049 394
JMF 16:3bac55ad2049 395 va_list valist;
JMF 16:3bac55ad2049 396 buff.reserve(2048);
JMF 16:3bac55ad2049 397 va_start(valist, format);
JMF 16:3bac55ad2049 398 vsprintf(&buff[0],format,valist);
JMF 16:3bac55ad2049 399 pc.puts(buff.c_str());
JMF 16:3bac55ad2049 400 va_end(valist);
JMF 16:3bac55ad2049 401 return 0;
JMF 16:3bac55ad2049 402 }
JMF 16:3bac55ad2049 403
JMF 16:3bac55ad2049 404 #ifdef __cplusplus
JMF 16:3bac55ad2049 405 }
JMF 16:3bac55ad2049 406 #endif
Janos Follath 0:fc70c47eecb4 407 /**
Janos Follath 0:fc70c47eecb4 408 * The main loop of the HTTPS Hello World test
Janos Follath 0:fc70c47eecb4 409 */
Janos Follath 0:fc70c47eecb4 410 int main() {
JMF 16:3bac55ad2049 411 int ret;
Janos Follath 0:fc70c47eecb4 412 /* The default 9600 bps is too slow to print full TLS debug info and could
Janos Follath 0:fc70c47eecb4 413 * cause the other party to time out. */
Janos Follath 0:fc70c47eecb4 414
Janos Follath 0:fc70c47eecb4 415 /* Inititalise with DHCP, connect, and start up the stack */
JMF 16:3bac55ad2049 416 WNCInterface eth_iface;
JMF 16:3bac55ad2049 417
JMF 16:3bac55ad2049 418 pc.baud(115200);
JMF 16:3bac55ad2049 419 pc.printf(CRLF "Starting HTTPS File Download Example for TLS use WNC Data Module" CRLF);
JMF 16:3bac55ad2049 420
JMF 16:3bac55ad2049 421 ret = eth_iface.init(NULL, &pc);
JMF 16:3bac55ad2049 422 pc.printf("WNC Module %s initialized (%02X)." CRLF, ret?"IS":"IS NOT", ret);
JMF 16:3bac55ad2049 423 if( !ret ) {
JMF 16:3bac55ad2049 424 pc.printf(" - - - - - - - ALL DONE - - - - - - - " CRLF);
JMF 16:3bac55ad2049 425 while(1);
JMF 16:3bac55ad2049 426 }
JMF 16:3bac55ad2049 427
Janos Follath 0:fc70c47eecb4 428 eth_iface.connect();
JMF 16:3bac55ad2049 429 pc.printf("IP Address: %s " CRLF CRLF, eth_iface.getIPAddress());
Janos Follath 0:fc70c47eecb4 430
mbed_official 9:1ac74f2d7bda 431 HelloHTTPS *hello = new HelloHTTPS(HTTPS_SERVER_NAME, HTTPS_SERVER_PORT, &eth_iface);
mbed_official 9:1ac74f2d7bda 432 hello->startTest(HTTPS_PATH);
JMF 16:3bac55ad2049 433 pc.printf(" >>> DONE <<<\r\n");
mbed_official 9:1ac74f2d7bda 434 delete hello;
Janos Follath 0:fc70c47eecb4 435 }