programs/ssl/mini_client.c - security/mbedtls - Rivoreo Source Code Repositories

 /*
  *  Minimal SSL client, used for memory measurements.
  *  (meant to be used with config-suite-b.h or config-ccm-psk-tls1_2.h)
  *
  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *  SPDX-License-Identifier: Apache-2.0
  *
  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
  *  not use this file except in compliance with the License.
  *  You may obtain a copy of the License at
  *
  *  http://www.apache.org/licenses/LICENSE-2.0
  *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  *
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */

 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
 #else
 #include MBEDTLS_CONFIG_FILE
 #endif

 /*
  * We're creating and connecting the socket "manually" rather than using the
  * NET module, in order to avoid the overhead of getaddrinfo() which tends to
  * dominate memory usage in small configurations. For the sake of simplicity,
  * only a Unix version is implemented.
  *
  * Warning: we are breaking some of the abtractions from the NET layer here.
  * This is not a good example for general use. This programs has the specific
  * goal of minimizing use of the libc functions on full-blown OSes.
  */
 #if defined(unix) || defined(__unix__) || defined(__unix) || defined(__APPLE__)
 #define UNIX
 #endif

 #if !defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_ENTROPY_C) || \
     !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_SSL_CLI_C) || \
     !defined(UNIX)

 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
 #define mbedtls_printf printf
 #endif

 int main( void )
 {
     mbedtls_printf( "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_ENTROPY_C and/or "
             "MBEDTLS_NET_C and/or MBEDTLS_SSL_CLI_C and/or UNIX "
             "not defined.\n");
     return( 0 );
 }
 #else

 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
 #else
 #include <stdlib.h>
 #endif

 #include <string.h>

 #include "mbedtls/net.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"

 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>

 /*
  * Hardcoded values for server host and port
  */
 #define PORT_BE 0x1151      /* 4433 */
 #define PORT_LE 0x5111
 #define ADDR_BE 0x7f000001  /* 127.0.0.1 */
 #define ADDR_LE 0x0100007f
 #define HOSTNAME "localhost" /* for cert verification if enabled */

 #define GET_REQUEST "GET / HTTP/1.0\r\n\r\n"

 const char *pers = "mini_client";

 #if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
 const unsigned char psk[] = {
     0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
 };
 const char psk_id[] = "Client_identity";
 #endif

 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 /* This is tests/data_files/test-ca2.crt, a CA using EC secp384r1 */
 const unsigned char ca_cert[] = {
     0x30, 0x82, 0x02, 0x52, 0x30, 0x82, 0x01, 0xd7, 0xa0, 0x03, 0x02, 0x01,
     0x02, 0x02, 0x09, 0x00, 0xc1, 0x43, 0xe2, 0x7e, 0x62, 0x43, 0xcc, 0xe8,
     0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02,
     0x30, 0x3e, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13,
     0x02, 0x4e, 0x4c, 0x31, 0x11, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x04, 0x0a,
     0x13, 0x08, 0x50, 0x6f, 0x6c, 0x61, 0x72, 0x53, 0x53, 0x4c, 0x31, 0x1c,
     0x30, 0x1a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x13, 0x50, 0x6f, 0x6c,
     0x61, 0x72, 0x73, 0x73, 0x6c, 0x20, 0x54, 0x65, 0x73, 0x74, 0x20, 0x45,
     0x43, 0x20, 0x43, 0x41, 0x30, 0x1e, 0x17, 0x0d, 0x31, 0x33, 0x30, 0x39,
     0x32, 0x34, 0x31, 0x35, 0x34, 0x39, 0x34, 0x38, 0x5a, 0x17, 0x0d, 0x32,
     0x33, 0x30, 0x39, 0x32, 0x32, 0x31, 0x35, 0x34, 0x39, 0x34, 0x38, 0x5a,
     0x30, 0x3e, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13,
     0x02, 0x4e, 0x4c, 0x31, 0x11, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x04, 0x0a,
     0x13, 0x08, 0x50, 0x6f, 0x6c, 0x61, 0x72, 0x53, 0x53, 0x4c, 0x31, 0x1c,
     0x30, 0x1a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x13, 0x50, 0x6f, 0x6c,
     0x61, 0x72, 0x73, 0x73, 0x6c, 0x20, 0x54, 0x65, 0x73, 0x74, 0x20, 0x45,
     0x43, 0x20, 0x43, 0x41, 0x30, 0x76, 0x30, 0x10, 0x06, 0x07, 0x2a, 0x86,
     0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x05, 0x2b, 0x81, 0x04, 0x00, 0x22,
     0x03, 0x62, 0x00, 0x04, 0xc3, 0xda, 0x2b, 0x34, 0x41, 0x37, 0x58, 0x2f,
     0x87, 0x56, 0xfe, 0xfc, 0x89, 0xba, 0x29, 0x43, 0x4b, 0x4e, 0xe0, 0x6e,
     0xc3, 0x0e, 0x57, 0x53, 0x33, 0x39, 0x58, 0xd4, 0x52, 0xb4, 0x91, 0x95,
     0x39, 0x0b, 0x23, 0xdf, 0x5f, 0x17, 0x24, 0x62, 0x48, 0xfc, 0x1a, 0x95,
     0x29, 0xce, 0x2c, 0x2d, 0x87, 0xc2, 0x88, 0x52, 0x80, 0xaf, 0xd6, 0x6a,
     0xab, 0x21, 0xdd, 0xb8, 0xd3, 0x1c, 0x6e, 0x58, 0xb8, 0xca, 0xe8, 0xb2,
     0x69, 0x8e, 0xf3, 0x41, 0xad, 0x29, 0xc3, 0xb4, 0x5f, 0x75, 0xa7, 0x47,
     0x6f, 0xd5, 0x19, 0x29, 0x55, 0x69, 0x9a, 0x53, 0x3b, 0x20, 0xb4, 0x66,
     0x16, 0x60, 0x33, 0x1e, 0xa3, 0x81, 0xa0, 0x30, 0x81, 0x9d, 0x30, 0x1d,
     0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0x9d, 0x6d, 0x20,
     0x24, 0x49, 0x01, 0x3f, 0x2b, 0xcb, 0x78, 0xb5, 0x19, 0xbc, 0x7e, 0x24,
     0xc9, 0xdb, 0xfb, 0x36, 0x7c, 0x30, 0x6e, 0x06, 0x03, 0x55, 0x1d, 0x23,
     0x04, 0x67, 0x30, 0x65, 0x80, 0x14, 0x9d, 0x6d, 0x20, 0x24, 0x49, 0x01,
     0x3f, 0x2b, 0xcb, 0x78, 0xb5, 0x19, 0xbc, 0x7e, 0x24, 0xc9, 0xdb, 0xfb,
     0x36, 0x7c, 0xa1, 0x42, 0xa4, 0x40, 0x30, 0x3e, 0x31, 0x0b, 0x30, 0x09,
     0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x4e, 0x4c, 0x31, 0x11, 0x30,
     0x0f, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x08, 0x50, 0x6f, 0x6c, 0x61,
     0x72, 0x53, 0x53, 0x4c, 0x31, 0x1c, 0x30, 0x1a, 0x06, 0x03, 0x55, 0x04,
     0x03, 0x13, 0x13, 0x50, 0x6f, 0x6c, 0x61, 0x72, 0x73, 0x73, 0x6c, 0x20,
     0x54, 0x65, 0x73, 0x74, 0x20, 0x45, 0x43, 0x20, 0x43, 0x41, 0x82, 0x09,
     0x00, 0xc1, 0x43, 0xe2, 0x7e, 0x62, 0x43, 0xcc, 0xe8, 0x30, 0x0c, 0x06,
     0x03, 0x55, 0x1d, 0x13, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xff, 0x30,
     0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02, 0x03,
     0x69, 0x00, 0x30, 0x66, 0x02, 0x31, 0x00, 0xc3, 0xb4, 0x62, 0x73, 0x56,
     0x28, 0x95, 0x00, 0x7d, 0x78, 0x12, 0x26, 0xd2, 0x71, 0x7b, 0x19, 0xf8,
     0x8a, 0x98, 0x3e, 0x92, 0xfe, 0x33, 0x9e, 0xe4, 0x79, 0xd2, 0xfe, 0x7a,
     0xb7, 0x87, 0x74, 0x3c, 0x2b, 0xb8, 0xd7, 0x69, 0x94, 0x0b, 0xa3, 0x67,
     0x77, 0xb8, 0xb3, 0xbe, 0xd1, 0x36, 0x32, 0x02, 0x31, 0x00, 0xfd, 0x67,
     0x9c, 0x94, 0x23, 0x67, 0xc0, 0x56, 0xba, 0x4b, 0x33, 0x15, 0x00, 0xc6,
     0xe3, 0xcc, 0x31, 0x08, 0x2c, 0x9c, 0x8b, 0xda, 0xa9, 0x75, 0x23, 0x2f,
     0xb8, 0x28, 0xe7, 0xf2, 0x9c, 0x14, 0x3a, 0x40, 0x01, 0x5c, 0xaf, 0x0c,
     0xb2, 0xcf, 0x74, 0x7f, 0x30, 0x9f, 0x08, 0x43, 0xad, 0x20,
 };
 #endif /* MBEDTLS_X509_CRT_PARSE_C */

 enum exit_codes
 {
     exit_ok = 0,
     ctr_drbg_seed_failed,
     ssl_config_defaults_failed,
     ssl_setup_failed,
     hostname_failed,
     socket_failed,
     connect_failed,
     x509_crt_parse_failed,
     ssl_handshake_failed,
     ssl_write_failed,
 };

 int main( void )
 {
     int ret = exit_ok;
     mbedtls_net_context server_fd;
     struct sockaddr_in addr;
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     mbedtls_x509_crt ca;
 #endif

     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
     mbedtls_ssl_context ssl;
     mbedtls_ssl_config conf;
     mbedtls_ctr_drbg_init( &ctr_drbg );

     /*
      * 0. Initialize and setup stuff
      */
     mbedtls_net_init( &server_fd );
     mbedtls_ssl_init( &ssl );
     mbedtls_ssl_config_init( &conf );
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     mbedtls_x509_crt_init( &ca );
 #endif

     mbedtls_entropy_init( &entropy );
     if( mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
                        (const unsigned char *) pers, strlen( pers ) ) != 0 )
     {
         ret = ctr_drbg_seed_failed;
         goto exit;
     }

     if( mbedtls_ssl_config_defaults( &conf,
                 MBEDTLS_SSL_IS_CLIENT,
                 MBEDTLS_SSL_TRANSPORT_STREAM,
                 MBEDTLS_SSL_PRESET_DEFAULT ) != 0 )
     {
         ret = ssl_config_defaults_failed;
         goto exit;
     }

     mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );

 #if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
     mbedtls_ssl_conf_psk( &conf, psk, sizeof( psk ),
                 (const unsigned char *) psk_id, sizeof( psk_id ) - 1 );
 #endif

 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     if( mbedtls_x509_crt_parse_der( &ca, ca_cert, sizeof( ca_cert ) ) != 0 )
     {
         ret = x509_crt_parse_failed;
         goto exit;
     }

     mbedtls_ssl_conf_ca_chain( &conf, &ca, NULL );
     mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_REQUIRED );
 #endif

     if( mbedtls_ssl_setup( &ssl, &conf ) != 0 )
     {
         ret = ssl_setup_failed;
         goto exit;
     }

 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     if( mbedtls_ssl_set_hostname( &ssl, HOSTNAME ) != 0 )
     {
         ret = hostname_failed;
         goto exit;
     }
 #endif

     /*
      * 1. Start the connection
      */
     memset( &addr, 0, sizeof( addr ) );
     addr.sin_family = AF_INET;

     ret = 1; /* for endianness detection */
     addr.sin_port = *((char *) &ret) == ret ? PORT_LE : PORT_BE;
     addr.sin_addr.s_addr = *((char *) &ret) == ret ? ADDR_LE : ADDR_BE;
     ret = 0;

     if( ( server_fd.fd = socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
     {
         ret = socket_failed;
         goto exit;
     }

     if( connect( server_fd.fd,
                 (const struct sockaddr *) &addr, sizeof( addr ) ) < 0 )
     {
         ret = connect_failed;
         goto exit;
     }

     mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );

     if( mbedtls_ssl_handshake( &ssl ) != 0 )
     {
         ret = ssl_handshake_failed;
         goto exit;
     }

     /*
      * 2. Write the GET request and close the connection
      */
     if( mbedtls_ssl_write( &ssl, (const unsigned char *) GET_REQUEST,
                          sizeof( GET_REQUEST ) - 1 ) <= 0 )
     {
         ret = ssl_write_failed;
         goto exit;
     }

     mbedtls_ssl_close_notify( &ssl );

 exit:
     mbedtls_net_free( &server_fd );

     mbedtls_ssl_free( &ssl );
     mbedtls_ssl_config_free( &conf );
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     mbedtls_x509_crt_free( &ca );
 #endif

     return( ret );
 }
 #endif
	/*
	* Minimal SSL client, used for memory measurements.
	* (meant to be used with config-suite-b.h or config-ccm-psk-tls1_2.h)
	*
	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
	* SPDX-License-Identifier: Apache-2.0
	*
	* Licensed under the Apache License, Version 2.0 (the "License"); you may
	* not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	* This file is part of mbed TLS (https://tls.mbed.org)
	*/

	#if !defined(MBEDTLS_CONFIG_FILE)
	#include "mbedtls/config.h"
	#else
	#include MBEDTLS_CONFIG_FILE
	#endif

	/*
	* We're creating and connecting the socket "manually" rather than using the
	* NET module, in order to avoid the overhead of getaddrinfo() which tends to
	* dominate memory usage in small configurations. For the sake of simplicity,
	* only a Unix version is implemented.
	*
	* Warning: we are breaking some of the abtractions from the NET layer here.
	* This is not a good example for general use. This programs has the specific
	* goal of minimizing use of the libc functions on full-blown OSes.
	*/
	#if defined(unix) \|\| defined(__unix__) \|\| defined(__unix) \|\| defined(__APPLE__)
	#define UNIX
	#endif

	#if !defined(MBEDTLS_CTR_DRBG_C) \|\| !defined(MBEDTLS_ENTROPY_C) \|\| \
	!defined(MBEDTLS_NET_C) \|\| !defined(MBEDTLS_SSL_CLI_C) \|\| \
	!defined(UNIX)

	#if defined(MBEDTLS_PLATFORM_C)
	#include "mbedtls/platform.h"
	#else
	#include <stdio.h>
	#define mbedtls_printf printf
	#endif

	int main( void )
	{
	mbedtls_printf( "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_ENTROPY_C and/or "
	"MBEDTLS_NET_C and/or MBEDTLS_SSL_CLI_C and/or UNIX "
	"not defined.\n");
	return( 0 );
	}
	#else

	#if defined(MBEDTLS_PLATFORM_C)
	#include "mbedtls/platform.h"
	#else
	#include <stdlib.h>
	#endif

	#include <string.h>

	#include "mbedtls/net.h"
	#include "mbedtls/ssl.h"
	#include "mbedtls/entropy.h"
	#include "mbedtls/ctr_drbg.h"

	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>

	/*
	* Hardcoded values for server host and port
	*/
	#define PORT_BE 0x1151 /* 4433 */
	#define PORT_LE 0x5111
	#define ADDR_BE 0x7f000001 /* 127.0.0.1 */
	#define ADDR_LE 0x0100007f
	#define HOSTNAME "localhost" /* for cert verification if enabled */

	#define GET_REQUEST "GET / HTTP/1.0\r\n\r\n"

	const char *pers = "mini_client";

	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
	const unsigned char psk[] = {
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
	};
	const char psk_id[] = "Client_identity";
	#endif

	#if defined(MBEDTLS_X509_CRT_PARSE_C)
	/* This is tests/data_files/test-ca2.crt, a CA using EC secp384r1 */
	const unsigned char ca_cert[] = {
	0x30, 0x82, 0x02, 0x52, 0x30, 0x82, 0x01, 0xd7, 0xa0, 0x03, 0x02, 0x01,
	0x02, 0x02, 0x09, 0x00, 0xc1, 0x43, 0xe2, 0x7e, 0x62, 0x43, 0xcc, 0xe8,
	0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02,
	0x30, 0x3e, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13,
	0x02, 0x4e, 0x4c, 0x31, 0x11, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x04, 0x0a,
	0x13, 0x08, 0x50, 0x6f, 0x6c, 0x61, 0x72, 0x53, 0x53, 0x4c, 0x31, 0x1c,
	0x30, 0x1a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x13, 0x50, 0x6f, 0x6c,
	0x61, 0x72, 0x73, 0x73, 0x6c, 0x20, 0x54, 0x65, 0x73, 0x74, 0x20, 0x45,
	0x43, 0x20, 0x43, 0x41, 0x30, 0x1e, 0x17, 0x0d, 0x31, 0x33, 0x30, 0x39,
	0x32, 0x34, 0x31, 0x35, 0x34, 0x39, 0x34, 0x38, 0x5a, 0x17, 0x0d, 0x32,
	0x33, 0x30, 0x39, 0x32, 0x32, 0x31, 0x35, 0x34, 0x39, 0x34, 0x38, 0x5a,
	0x30, 0x3e, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13,
	0x02, 0x4e, 0x4c, 0x31, 0x11, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x04, 0x0a,
	0x13, 0x08, 0x50, 0x6f, 0x6c, 0x61, 0x72, 0x53, 0x53, 0x4c, 0x31, 0x1c,
	0x30, 0x1a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x13, 0x50, 0x6f, 0x6c,
	0x61, 0x72, 0x73, 0x73, 0x6c, 0x20, 0x54, 0x65, 0x73, 0x74, 0x20, 0x45,
	0x43, 0x20, 0x43, 0x41, 0x30, 0x76, 0x30, 0x10, 0x06, 0x07, 0x2a, 0x86,
	0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x05, 0x2b, 0x81, 0x04, 0x00, 0x22,
	0x03, 0x62, 0x00, 0x04, 0xc3, 0xda, 0x2b, 0x34, 0x41, 0x37, 0x58, 0x2f,
	0x87, 0x56, 0xfe, 0xfc, 0x89, 0xba, 0x29, 0x43, 0x4b, 0x4e, 0xe0, 0x6e,
	0xc3, 0x0e, 0x57, 0x53, 0x33, 0x39, 0x58, 0xd4, 0x52, 0xb4, 0x91, 0x95,
	0x39, 0x0b, 0x23, 0xdf, 0x5f, 0x17, 0x24, 0x62, 0x48, 0xfc, 0x1a, 0x95,
	0x29, 0xce, 0x2c, 0x2d, 0x87, 0xc2, 0x88, 0x52, 0x80, 0xaf, 0xd6, 0x6a,
	0xab, 0x21, 0xdd, 0xb8, 0xd3, 0x1c, 0x6e, 0x58, 0xb8, 0xca, 0xe8, 0xb2,
	0x69, 0x8e, 0xf3, 0x41, 0xad, 0x29, 0xc3, 0xb4, 0x5f, 0x75, 0xa7, 0x47,
	0x6f, 0xd5, 0x19, 0x29, 0x55, 0x69, 0x9a, 0x53, 0x3b, 0x20, 0xb4, 0x66,
	0x16, 0x60, 0x33, 0x1e, 0xa3, 0x81, 0xa0, 0x30, 0x81, 0x9d, 0x30, 0x1d,
	0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0x9d, 0x6d, 0x20,
	0x24, 0x49, 0x01, 0x3f, 0x2b, 0xcb, 0x78, 0xb5, 0x19, 0xbc, 0x7e, 0x24,
	0xc9, 0xdb, 0xfb, 0x36, 0x7c, 0x30, 0x6e, 0x06, 0x03, 0x55, 0x1d, 0x23,
	0x04, 0x67, 0x30, 0x65, 0x80, 0x14, 0x9d, 0x6d, 0x20, 0x24, 0x49, 0x01,
	0x3f, 0x2b, 0xcb, 0x78, 0xb5, 0x19, 0xbc, 0x7e, 0x24, 0xc9, 0xdb, 0xfb,
	0x36, 0x7c, 0xa1, 0x42, 0xa4, 0x40, 0x30, 0x3e, 0x31, 0x0b, 0x30, 0x09,
	0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x4e, 0x4c, 0x31, 0x11, 0x30,
	0x0f, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x08, 0x50, 0x6f, 0x6c, 0x61,
	0x72, 0x53, 0x53, 0x4c, 0x31, 0x1c, 0x30, 0x1a, 0x06, 0x03, 0x55, 0x04,
	0x03, 0x13, 0x13, 0x50, 0x6f, 0x6c, 0x61, 0x72, 0x73, 0x73, 0x6c, 0x20,
	0x54, 0x65, 0x73, 0x74, 0x20, 0x45, 0x43, 0x20, 0x43, 0x41, 0x82, 0x09,
	0x00, 0xc1, 0x43, 0xe2, 0x7e, 0x62, 0x43, 0xcc, 0xe8, 0x30, 0x0c, 0x06,
	0x03, 0x55, 0x1d, 0x13, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xff, 0x30,
	0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02, 0x03,
	0x69, 0x00, 0x30, 0x66, 0x02, 0x31, 0x00, 0xc3, 0xb4, 0x62, 0x73, 0x56,
	0x28, 0x95, 0x00, 0x7d, 0x78, 0x12, 0x26, 0xd2, 0x71, 0x7b, 0x19, 0xf8,
	0x8a, 0x98, 0x3e, 0x92, 0xfe, 0x33, 0x9e, 0xe4, 0x79, 0xd2, 0xfe, 0x7a,
	0xb7, 0x87, 0x74, 0x3c, 0x2b, 0xb8, 0xd7, 0x69, 0x94, 0x0b, 0xa3, 0x67,
	0x77, 0xb8, 0xb3, 0xbe, 0xd1, 0x36, 0x32, 0x02, 0x31, 0x00, 0xfd, 0x67,
	0x9c, 0x94, 0x23, 0x67, 0xc0, 0x56, 0xba, 0x4b, 0x33, 0x15, 0x00, 0xc6,
	0xe3, 0xcc, 0x31, 0x08, 0x2c, 0x9c, 0x8b, 0xda, 0xa9, 0x75, 0x23, 0x2f,
	0xb8, 0x28, 0xe7, 0xf2, 0x9c, 0x14, 0x3a, 0x40, 0x01, 0x5c, 0xaf, 0x0c,
	0xb2, 0xcf, 0x74, 0x7f, 0x30, 0x9f, 0x08, 0x43, 0xad, 0x20,
	};
	#endif /* MBEDTLS_X509_CRT_PARSE_C */

	enum exit_codes
	{
	exit_ok = 0,
	ctr_drbg_seed_failed,
	ssl_config_defaults_failed,
	ssl_setup_failed,
	hostname_failed,
	socket_failed,
	connect_failed,
	x509_crt_parse_failed,
	ssl_handshake_failed,
	ssl_write_failed,
	};

	int main( void )
	{
	int ret = exit_ok;
	mbedtls_net_context server_fd;
	struct sockaddr_in addr;
	#if defined(MBEDTLS_X509_CRT_PARSE_C)
	mbedtls_x509_crt ca;
	#endif

	mbedtls_entropy_context entropy;
	mbedtls_ctr_drbg_context ctr_drbg;
	mbedtls_ssl_context ssl;
	mbedtls_ssl_config conf;
	mbedtls_ctr_drbg_init( &ctr_drbg );

	/*
	* 0. Initialize and setup stuff
	*/
	mbedtls_net_init( &server_fd );
	mbedtls_ssl_init( &ssl );
	mbedtls_ssl_config_init( &conf );
	#if defined(MBEDTLS_X509_CRT_PARSE_C)
	mbedtls_x509_crt_init( &ca );
	#endif

	mbedtls_entropy_init( &entropy );
	if( mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
	(const unsigned char *) pers, strlen( pers ) ) != 0 )
	{
	ret = ctr_drbg_seed_failed;
	goto exit;
	}

	if( mbedtls_ssl_config_defaults( &conf,
	MBEDTLS_SSL_IS_CLIENT,
	MBEDTLS_SSL_TRANSPORT_STREAM,
	MBEDTLS_SSL_PRESET_DEFAULT ) != 0 )
	{
	ret = ssl_config_defaults_failed;
	goto exit;
	}

	mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );

	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
	mbedtls_ssl_conf_psk( &conf, psk, sizeof( psk ),
	(const unsigned char *) psk_id, sizeof( psk_id ) - 1 );
	#endif

	#if defined(MBEDTLS_X509_CRT_PARSE_C)
	if( mbedtls_x509_crt_parse_der( &ca, ca_cert, sizeof( ca_cert ) ) != 0 )
	{
	ret = x509_crt_parse_failed;
	goto exit;
	}

	mbedtls_ssl_conf_ca_chain( &conf, &ca, NULL );
	mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_REQUIRED );
	#endif

	if( mbedtls_ssl_setup( &ssl, &conf ) != 0 )
	{
	ret = ssl_setup_failed;
	goto exit;
	}

	#if defined(MBEDTLS_X509_CRT_PARSE_C)
	if( mbedtls_ssl_set_hostname( &ssl, HOSTNAME ) != 0 )
	{
	ret = hostname_failed;
	goto exit;
	}
	#endif

	/*
	* 1. Start the connection
	*/
	memset( &addr, 0, sizeof( addr ) );
	addr.sin_family = AF_INET;

	ret = 1; /* for endianness detection */
	addr.sin_port = ((char ) &ret) == ret ? PORT_LE : PORT_BE;
	addr.sin_addr.s_addr = ((char ) &ret) == ret ? ADDR_LE : ADDR_BE;
	ret = 0;

	if( ( server_fd.fd = socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
	{
	ret = socket_failed;
	goto exit;
	}

	if( connect( server_fd.fd,
	(const struct sockaddr *) &addr, sizeof( addr ) ) < 0 )
	{
	ret = connect_failed;
	goto exit;
	}

	mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );

	if( mbedtls_ssl_handshake( &ssl ) != 0 )
	{
	ret = ssl_handshake_failed;
	goto exit;
	}

	/*
	* 2. Write the GET request and close the connection
	*/
	if( mbedtls_ssl_write( &ssl, (const unsigned char *) GET_REQUEST,
	sizeof( GET_REQUEST ) - 1 ) <= 0 )
	{
	ret = ssl_write_failed;
	goto exit;
	}

	mbedtls_ssl_close_notify( &ssl );

	exit:
	mbedtls_net_free( &server_fd );

	mbedtls_ssl_free( &ssl );
	mbedtls_ssl_config_free( &conf );
	mbedtls_ctr_drbg_free( &ctr_drbg );
	mbedtls_entropy_free( &entropy );
	#if defined(MBEDTLS_X509_CRT_PARSE_C)
	mbedtls_x509_crt_free( &ca );
	#endif

	return( ret );
	}
	#endif