mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-12-24 12:45:35 +00:00
522 lines
18 KiB
C++
522 lines
18 KiB
C++
/*
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* Hello world example of a TLS client: fetch an HTTPS page
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(TARGET_LIKE_MBED)
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#include <stdio.h>
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int main() {
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printf("this program only works on mbed OS\n");
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return 0;
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}
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#else
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/** \file main.cpp
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* \brief An example TLS Client application
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* This application sends an HTTPS request to developer.mbed.org and searches for a string in
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* the result.
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*
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* This example is implemented as a logic class (HelloHTTPS) wrapping a TCP socket.
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* The logic class handles all events, leaving the main loop to just check if the process
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* has finished.
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*/
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/* Change to a number between 1 and 4 to debug the TLS connection */
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#define DEBUG_LEVEL 0
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/* Change to 1 to skip certificate verification (UNSAFE, for debug only!) */
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#define UNSAFE 0
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#include "mbed.h"
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#include "EthernetInterface.h"
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#include "mbed-net-sockets/TCPStream.h"
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#include "test_env.h"
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#include "minar/minar.h"
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#include "lwipv4_init.h"
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#include "mbedtls/ssl.h"
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include "mbedtls/error.h"
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#if DEBUG_LEVEL > 0
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#include "mbedtls/debug.h"
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#endif
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namespace {
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const char *HTTPS_SERVER_NAME = "developer.mbed.org";
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const int HTTPS_SERVER_PORT = 443;
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const int RECV_BUFFER_SIZE = 600;
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const char HTTPS_PATH[] = "/media/uploads/mbed_official/hello.txt";
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const size_t HTTPS_PATH_LEN = sizeof(HTTPS_PATH) - 1;
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/* Test related data */
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const char *HTTPS_OK_STR = "200 OK";
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const char *HTTPS_HELLO_STR = "Hello world!";
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/* personalization string for the drbg */
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const char *DRBG_PERS = "mbed TLS helloword client";
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/* List of trusted root CA certificates
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* currently only GlobalSign, the CA for developer.mbed.org
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*
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* To add more than one root, just concatenate them.
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*/
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const char SSL_CA_PEM[] =
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/* GlobalSign Root R1 SHA1/RSA/2048
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* Serial no. 04 00 00 00 00 01 15 4b 5a c3 94 */
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"-----BEGIN CERTIFICATE-----\n"
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"MIIDdTCCAl2gAwIBAgILBAAAAAABFUtaw5QwDQYJKoZIhvcNAQEFBQAwVzELMAkG\n"
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"A1UEBhMCQkUxGTAXBgNVBAoTEEdsb2JhbFNpZ24gbnYtc2ExEDAOBgNVBAsTB1Jv\n"
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"b3QgQ0ExGzAZBgNVBAMTEkdsb2JhbFNpZ24gUm9vdCBDQTAeFw05ODA5MDExMjAw\n"
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"MDBaFw0yODAxMjgxMjAwMDBaMFcxCzAJBgNVBAYTAkJFMRkwFwYDVQQKExBHbG9i\n"
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"YWxTaWduIG52LXNhMRAwDgYDVQQLEwdSb290IENBMRswGQYDVQQDExJHbG9iYWxT\n"
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"aWduIFJvb3QgQ0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDaDuaZ\n"
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"jc6j40+Kfvvxi4Mla+pIH/EqsLmVEQS98GPR4mdmzxzdzxtIK+6NiY6arymAZavp\n"
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"xy0Sy6scTHAHoT0KMM0VjU/43dSMUBUc71DuxC73/OlS8pF94G3VNTCOXkNz8kHp\n"
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"1Wrjsok6Vjk4bwY8iGlbKk3Fp1S4bInMm/k8yuX9ifUSPJJ4ltbcdG6TRGHRjcdG\n"
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"snUOhugZitVtbNV4FpWi6cgKOOvyJBNPc1STE4U6G7weNLWLBYy5d4ux2x8gkasJ\n"
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"U26Qzns3dLlwR5EiUWMWea6xrkEmCMgZK9FGqkjWZCrXgzT/LCrBbBlDSgeF59N8\n"
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"9iFo7+ryUp9/k5DPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMBAf8E\n"
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"BTADAQH/MB0GA1UdDgQWBBRge2YaRQ2XyolQL30EzTSo//z9SzANBgkqhkiG9w0B\n"
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"AQUFAAOCAQEA1nPnfE920I2/7LqivjTFKDK1fPxsnCwrvQmeU79rXqoRSLblCKOz\n"
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"yj1hTdNGCbM+w6DjY1Ub8rrvrTnhQ7k4o+YviiY776BQVvnGCv04zcQLcFGUl5gE\n"
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"38NflNUVyRRBnMRddWQVDf9VMOyGj/8N7yy5Y0b2qvzfvGn9LhJIZJrglfCm7ymP\n"
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"AbEVtQwdpf5pLGkkeB6zpxxxYu7KyJesF12KwvhHhm4qxFYxldBniYUr+WymXUad\n"
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"DKqC5JlR3XC321Y9YeRq4VzW9v493kHMB65jUr9TU/Qr6cf9tveCX4XSQRjbgbME\n"
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"HMUfpIBvFSDJ3gyICh3WZlXi/EjJKSZp4A==\n"
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"-----END CERTIFICATE-----\n";
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}
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using namespace mbed::Sockets::v0;
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/**
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* \brief HelloHTTPS implements the logic for fetching a file from a webserver
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* using a TCP socket and parsing the result.
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*/
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class HelloHTTPS {
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public:
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/**
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* HelloHTTPS Constructor
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* Initializes the TCP socket, sets up event handlers and flags.
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*
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* @param[in] domain The domain name to fetch from
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* @param[in] port The port of the HTTPS server
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*/
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HelloHTTPS(const char * domain, const uint16_t port) :
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_stream(SOCKET_STACK_LWIP_IPV4), _domain(domain), _port(port)
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{
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_error = false;
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_gothello = false;
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_got200 = false;
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_bpos = 0;
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_request_sent = 0;
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_stream.open(SOCKET_AF_INET4);
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mbedtls_entropy_init(&_entropy);
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mbedtls_ctr_drbg_init(&_ctr_drbg);
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mbedtls_x509_crt_init(&_cacert);
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mbedtls_ssl_init(&_ssl);
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mbedtls_ssl_config_init(&_ssl_conf);
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}
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/**
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* HelloHTTPS Desctructor
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*/
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~HelloHTTPS() {
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mbedtls_entropy_free(&_entropy);
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mbedtls_ctr_drbg_free(&_ctr_drbg);
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mbedtls_x509_crt_free(&_cacert);
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mbedtls_ssl_free(&_ssl);
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mbedtls_ssl_config_free(&_ssl_conf);
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}
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/**
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* Initiate the test.
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*
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* Starts by clearing test flags, then resolves the address with DNS.
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*
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* @param[in] path The path of the file to fetch from the HTTPS server
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* @return SOCKET_ERROR_NONE on success, or an error code on failure
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*/
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void startTest(const char *path) {
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/* Initialize the flags */
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_got200 = false;
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_gothello = false;
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_error = false;
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_disconnected = false;
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_request_sent = false;
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/* Fill the request buffer */
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_bpos = snprintf(_buffer, sizeof(_buffer) - 1, "GET %s HTTP/1.1\nHost: %s\n\n", path, HTTPS_SERVER_NAME);
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/*
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* Initialize TLS-related stuf.
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*/
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int ret;
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if ((ret = mbedtls_ctr_drbg_seed(&_ctr_drbg, mbedtls_entropy_func, &_entropy,
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(const unsigned char *) DRBG_PERS,
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sizeof (DRBG_PERS))) != 0) {
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print_mbedtls_error("mbedtls_crt_drbg_init", ret);
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_error = true;
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return;
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}
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if ((ret = mbedtls_x509_crt_parse(&_cacert, (const unsigned char *) SSL_CA_PEM,
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sizeof (SSL_CA_PEM))) != 0) {
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print_mbedtls_error("mbedtls_x509_crt_parse", ret);
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_error = true;
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return;
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}
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if ((ret = mbedtls_ssl_config_defaults(&_ssl_conf,
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MBEDTLS_SSL_IS_CLIENT,
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MBEDTLS_SSL_TRANSPORT_STREAM,
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MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
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print_mbedtls_error("mbedtls_ssl_config_defaults", ret);
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_error = true;
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return;
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}
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mbedtls_ssl_conf_ca_chain(&_ssl_conf, &_cacert, NULL);
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mbedtls_ssl_conf_rng(&_ssl_conf, mbedtls_ctr_drbg_random, &_ctr_drbg);
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#if UNSAFE
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mbedtls_ssl_conf_authmode(&_ssl_conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
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#endif
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#if DEBUG_LEVEL > 0
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mbedtls_ssl_conf_verify(&_ssl_conf, my_verify, NULL);
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mbedtls_ssl_conf_dbg(&_ssl_conf, my_debug, NULL);
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mbedtls_debug_set_threshold(DEBUG_LEVEL);
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#endif
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if ((ret = mbedtls_ssl_setup(&_ssl, &_ssl_conf)) != 0) {
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print_mbedtls_error("mbedtls_ssl_setup", ret);
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_error = true;
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return;
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}
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mbedtls_ssl_set_hostname(&_ssl, HTTPS_SERVER_NAME);
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mbedtls_ssl_set_bio(&_ssl, static_cast<void *>(&_stream),
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ssl_send, ssl_recv, NULL );
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/* Connect to the server */
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printf("Starting DNS lookup for %s\r\n", _domain);
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/* Resolve the domain name: */
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socket_error_t err = _stream.resolve(_domain, TCPStream::DNSHandler_t(this, &HelloHTTPS::onDNS));
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_stream.error_check(err);
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}
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/**
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* Check if the test has completed.
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* @return Returns true if done, false otherwise.
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*/
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bool done() {
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return _error || (_got200 && _gothello);
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}
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/**
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* Check if there was an error
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* @return Returns true if there was an error, false otherwise.
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*/
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bool error() {
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return _error;
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}
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/**
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* Closes the TCP socket
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*/
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void close() {
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_stream.close();
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while (!_disconnected)
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__WFI();
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}
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protected:
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/**
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* Helper for pretty-printing mbed TLS error codes
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*/
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static void print_mbedtls_error(const char *name, int err) {
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char buf[128];
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mbedtls_strerror(err, buf, sizeof (buf));
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printf("%s() failed: -0x%04x (%d): %s\r\n", name, -err, err, buf);
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}
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#if DEBUG_LEVEL > 0
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/**
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* Debug callback for mbed TLS
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* Just prints on the USB serial port
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*/
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static void my_debug(void *ctx, int level, const char *file, int line,
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const char *str)
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{
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const char *p, *basename;
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(void) ctx;
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/* Extract basename from file */
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for(p = basename = file; *p != '\0'; p++) {
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if(*p == '/' || *p == '\\') {
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basename = p + 1;
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}
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}
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printf("%s:%04d: |%d| %s", basename, line, level, str);
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}
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/**
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* Certificate verification callback for mbed TLS
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* Here we only use it to display information on each cert in the chain
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*/
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static int my_verify(void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags)
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{
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char buf[1024];
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(void) data;
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printf("\nVerifying certificate at depth %d:\n", depth);
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mbedtls_x509_crt_info(buf, sizeof (buf) - 1, " ", crt);
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printf("%s", buf);
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if (*flags == 0)
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printf("No verification issue for this certificate\n");
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else
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{
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mbedtls_x509_crt_verify_info(buf, sizeof (buf), " ! ", *flags);
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printf("%s\n", buf);
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}
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return 0;
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}
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#endif
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/**
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* Receive callback for mbed TLS
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*/
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static int ssl_recv(void *ctx, unsigned char *buf, size_t len) {
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TCPStream *stream = static_cast<TCPStream *>(ctx);
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socket_error_t err = stream->recv(buf, &len);
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if (err == SOCKET_ERROR_NONE) {
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return static_cast<int>(len);
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} else if (err == SOCKET_ERROR_WOULD_BLOCK) {
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return MBEDTLS_ERR_SSL_WANT_READ;
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} else {
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return -1;
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}
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}
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/**
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* Send callback for mbed TLS
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*/
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static int ssl_send(void *ctx, const unsigned char *buf, size_t len) {
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TCPStream *stream = static_cast<TCPStream *>(ctx);
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socket_error_t err = stream->send(buf, len);
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if (err == SOCKET_ERROR_NONE) {
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return static_cast<int>(len);
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} else if (err == SOCKET_ERROR_WOULD_BLOCK) {
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return MBEDTLS_ERR_SSL_WANT_WRITE;
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} else {
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return -1;
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}
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}
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void onError(Socket *s, socket_error_t err) {
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(void) s;
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printf("MBED: Socket Error: %s (%d)\r\n", socket_strerror(err), err);
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_stream.close();
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_error = true;
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MBED_HOSTTEST_RESULT(false);
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}
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/**
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* On Connect handler
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* Starts the TLS handshake
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*/
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void onConnect(TCPStream *s) {
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char buf[16];
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_remoteAddr.fmtIPv4(buf,sizeof(buf));
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printf("Connected to %s:%d\r\n", buf, _port);
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s->setOnReadable(TCPStream::ReadableHandler_t(this, &HelloHTTPS::onReceive));
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s->setOnDisconnect(TCPStream::DisconnectHandler_t(this, &HelloHTTPS::onDisconnect));
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/* Start the handshake, the rest will be done in onReceive() */
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printf("Starting the TLS handshake...\r\n");
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int ret = mbedtls_ssl_handshake(&_ssl);
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if (ret < 0) {
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if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
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ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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print_mbedtls_error("mbedtls_ssl_handshake", ret);
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onError(s, SOCKET_ERROR_UNKNOWN);
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}
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return;
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}
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}
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/**
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* On Receive handler
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* Parses the response from the server, to check for the HTTPS 200 status code and the expected response ("Hello World!")
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*/
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void onReceive(Socket *s) {
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/* Send request if not done yet */
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if (!_request_sent) {
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int ret = mbedtls_ssl_write(&_ssl, (const unsigned char *) _buffer, _bpos);
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if (ret < 0) {
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if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
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ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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print_mbedtls_error("mbedtls_ssl_write", ret);
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onError(s, SOCKET_ERROR_UNKNOWN);
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}
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return;
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}
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/* If we get here, the request was sent */
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_request_sent = 1;
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/* It also means the handshake is done, time to print info */
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printf("TLS connection to %s established\r\n", HTTPS_SERVER_NAME);
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{
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char buf[1024];
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mbedtls_x509_crt_info(buf, sizeof(buf), "\r ",
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mbedtls_ssl_get_peer_cert(&_ssl));
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printf("Server certificate:\r\n%s\r", buf);
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#if defined(UNSAFE)
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uint32_t flags = mbedtls_ssl_get_verify_result(&_ssl);
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if( flags != 0 )
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{
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mbedtls_x509_crt_verify_info(buf, sizeof (buf), "\r ! ", flags);
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printf("Certificate verification failed:\r\n%s\r\r\n", buf);
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}
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else
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#endif
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printf("Certificate verification passed\r\n\r\n");
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}
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}
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/* Read data out of the socket */
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int ret = mbedtls_ssl_read(&_ssl, (unsigned char *) _buffer, sizeof(_buffer));
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if (ret < 0) {
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if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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print_mbedtls_error("mbedtls_ssl_read", ret);
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onError(s, SOCKET_ERROR_UNKNOWN);
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}
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return;
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}
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_bpos = static_cast<size_t>(ret);
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_buffer[_bpos] = 0;
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/* Check each of the flags */
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_got200 = _got200 || strstr(_buffer, HTTPS_OK_STR) != NULL;
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_gothello = _gothello || strstr(_buffer, HTTPS_HELLO_STR) != NULL;
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/* Print status messages */
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printf("HTTPS: Received %d chars from server\r\n", _bpos);
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printf("HTTPS: Received 200 OK status ... %s\r\n", _got200 ? "[OK]" : "[FAIL]");
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printf("HTTPS: Received '%s' status ... %s\r\n", HTTPS_HELLO_STR, _gothello ? "[OK]" : "[FAIL]");
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printf("HTTPS: Received message:\r\n\r\n");
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printf("%s", _buffer);
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_error = !(_got200 && _gothello);
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s->close();
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}
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/**
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* On DNS Handler
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* Reads the address returned by DNS, then starts the connect process.
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*/
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void onDNS(Socket *s, struct socket_addr addr, const char *domain) {
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/* Check that the result is a valid DNS response */
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if (socket_addr_is_any(&addr)) {
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/* Could not find DNS entry */
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printf("Could not find DNS entry for %s", HTTPS_SERVER_NAME);
|
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onError(s, SOCKET_ERROR_DNS_FAILED);
|
|
} else {
|
|
/* Start connecting to the remote host */
|
|
char buf[16];
|
|
_remoteAddr.setAddr(&addr);
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|
_remoteAddr.fmtIPv4(buf,sizeof(buf));
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|
printf("DNS Response Received:\r\n%s: %s\r\n", domain, buf);
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|
printf("Connecting to %s:%d\r\n", buf, _port);
|
|
socket_error_t err = _stream.connect(_remoteAddr, _port, TCPStream::ConnectHandler_t(this, &HelloHTTPS::onConnect));
|
|
|
|
if (err != SOCKET_ERROR_NONE) {
|
|
onError(s, err);
|
|
}
|
|
}
|
|
}
|
|
void onDisconnect(TCPStream *s) {
|
|
s->close();
|
|
MBED_HOSTTEST_RESULT(!error());
|
|
}
|
|
|
|
protected:
|
|
TCPStream _stream; /**< The TCP Socket */
|
|
const char *_domain; /**< The domain name of the HTTPS server */
|
|
const uint16_t _port; /**< The HTTPS server port */
|
|
char _buffer[RECV_BUFFER_SIZE]; /**< The response buffer */
|
|
size_t _bpos; /**< The current offset in the response buffer */
|
|
SocketAddr _remoteAddr; /**< The remote address */
|
|
volatile bool _got200; /**< Status flag for HTTPS 200 */
|
|
volatile bool _gothello; /**< Status flag for finding the test string */
|
|
volatile bool _error; /**< Status flag for an error */
|
|
volatile bool _disconnected;
|
|
volatile bool _request_sent;
|
|
|
|
mbedtls_entropy_context _entropy;
|
|
mbedtls_ctr_drbg_context _ctr_drbg;
|
|
mbedtls_x509_crt _cacert;
|
|
mbedtls_ssl_context _ssl;
|
|
mbedtls_ssl_config _ssl_conf;
|
|
};
|
|
|
|
/**
|
|
* The main loop of the HTTPS Hello World test
|
|
*/
|
|
EthernetInterface eth;
|
|
HelloHTTPS *hello;
|
|
|
|
void app_start(int, char*[]) {
|
|
/* The default 9600 bps is too slow to print full TLS debug info and could
|
|
* cause the other party to time out. Select a higher baud rate for
|
|
* printf(), regardless of debug level for the sake of uniformity. */
|
|
Serial pc(USBTX, USBRX);
|
|
pc.baud(115200);
|
|
|
|
MBED_HOSTTEST_TIMEOUT(120);
|
|
MBED_HOSTTEST_SELECT(default);
|
|
MBED_HOSTTEST_DESCRIPTION(mbed TLS example HTTPS client);
|
|
MBED_HOSTTEST_START("MBEDTLS_EX_HTTPS_CLIENT");
|
|
|
|
/* Initialise with DHCP, connect, and start up the stack */
|
|
eth.init();
|
|
eth.connect();
|
|
lwipv4_socket_init();
|
|
|
|
hello = new HelloHTTPS(HTTPS_SERVER_NAME, HTTPS_SERVER_PORT);
|
|
|
|
printf("Client IP Address is %s\r\n", eth.getIPAddress());
|
|
|
|
mbed::FunctionPointer1<void, const char*> fp(hello, &HelloHTTPS::startTest);
|
|
minar::Scheduler::postCallback(fp.bind(HTTPS_PATH));
|
|
}
|
|
|
|
#endif /* TARGET_LIKE_MBED */
|