samples/net/mbedtls_sslclient/src/mini_client.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  *  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
  *
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */

 #include <zephyr.h>
 #if defined(CONFIG_STDOUT_CONSOLE)
 #include <stdio.h>
 #define PRINT           printf
 #else
 #include <misc/printk.h>
 #define PRINT           printk
 #endif

 #include <errno.h>

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

 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
 #else
 #include <stdlib.h>
 #define mbedtls_time_t       time_t
 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
 #endif

 #include <string.h>
 #include "tcp.h"
 #include "tcp_cfg.h"

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

 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
 #include "mbedtls/memory_buffer_alloc.h"
 static unsigned char heap[20480];
 #endif

 /*
  * Hardcoded values for server host and port
  */
 #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,
 };

 static int entropy_source(void *data, unsigned char *output, size_t len,
 			  size_t *olen)
 {
 	u32_t seed;

 	ARG_UNUSED(data);

 	seed = sys_rand32_get();

 	if (len > sizeof(seed)) {
 		len = sizeof(seed);
 	}

 	memcpy(output, &seed, len);

 	*olen = len;

 	return 0;
 }

 void tls_client(void)
 {
 	int ret = exit_ok;
 	struct tcp_context ctx;

 	ctx.timeout = MBEDTLS_NETWORK_TIMEOUT;

 #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);

 	mbedtls_platform_set_printf(PRINT);

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

 	mbedtls_printf("\n  . Seeding the random number generator...");
 	mbedtls_entropy_init(&entropy);
 	mbedtls_entropy_add_source(&entropy, entropy_source, NULL,
 				   MBEDTLS_ENTROPY_MAX_GATHER,
 				   MBEDTLS_ENTROPY_SOURCE_STRONG);

 	if (mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
 				  (const unsigned char *)pers,
 				  strlen(pers)) != 0) {
 		ret = ctr_drbg_seed_failed;
 		mbedtls_printf
 		    (" failed\n  ! mbedtls_ctr_drbg_seed returned -0x%x\n",
 		     -ret);
 		goto exit;
 	}
 	mbedtls_printf(" ok\n");

 	mbedtls_printf("  . Setting up the SSL/TLS structure...");
 	if (mbedtls_ssl_config_defaults(&conf,
 					MBEDTLS_SSL_IS_CLIENT,
 					MBEDTLS_SSL_TRANSPORT_STREAM,
 					MBEDTLS_SSL_PRESET_DEFAULT) != 0) {
 		ret = ssl_config_defaults_failed;
 		mbedtls_printf
 		    (" failed\n  ! mbedtls_ssl_config_defaults returned -0x%x\n\n",
 		     -ret);
 		goto exit;
 	}

 	mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);

 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
 	mbedtls_memory_buffer_alloc_init(heap, sizeof(heap));
 #endif

 #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;
 		mbedtls_printf
 		    (" failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n",
 		     -ret);
 		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;
 		mbedtls_printf
 		    (" failed\n  ! mbedtls_ssl_setup returned -0x%x\n\n", -ret);
 		goto exit;
 	}
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 	if (mbedtls_ssl_set_hostname(&ssl, HOSTNAME) != 0) {
 		ret = hostname_failed;
 		mbedtls_printf
 		    (" failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n",
 		     ret);
 		goto exit;
 	}
 #endif
 	mbedtls_printf(" ok\n");

 	/*
 	 * 1. Start the connection
 	 */

 	mbedtls_printf("  . Connecting to tcp %s...", SERVER_ADDR);

 	if (tcp_set_local_addr(&ctx, LOCAL_ADDR) != 0) {
 		printk("tcp set_local_addr error\n");
 		goto exit;
 	}

 	if (tcp_init(&ctx, SERVER_ADDR, SERVER_PORT) != 0) {
 		ret = connect_failed;
 		mbedtls_printf(" failed\n  ! tcp_init returned -0x%x\n\n",
 			       -ret);
 		goto exit;
 	}

 	mbedtls_printf(" ok\n");

 	mbedtls_ssl_set_bio(&ssl, &ctx, tcp_tx, tcp_rx, NULL);

 	mbedtls_printf("  . Performing the SSL/TLS handshake...");
 	if (mbedtls_ssl_handshake(&ssl) != 0) {
 		ret = ssl_handshake_failed;
 		mbedtls_printf
 		    (" failed\n  ! mbedtls_ssl_handshake returned -0x%x\n",
 		     -ret);
 		goto exit;
 	}
 	mbedtls_printf(" ok\n");

 	/*
 	 * 2. Write the GET request and close the connection
 	 */
 	mbedtls_printf("  > Write to server:");
 	if (mbedtls_ssl_write(&ssl, (const unsigned char *)GET_REQUEST,
 			      sizeof(GET_REQUEST) - 1) <= 0) {
 		ret = ssl_write_failed;
 		mbedtls_printf
 		    (" failed\n  ! mbedtls_ssl_write returned -0x%x\n\n", -ret);
 		goto exit;
 	}
 	mbedtls_printf(" ok\n");

 	mbedtls_printf("  . Closing the connection...");
 	mbedtls_ssl_close_notify(&ssl);
 	mbedtls_printf(" done\n");
 exit:

 	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

 }

 #define STACK_SIZE		8192
 u8_t stack[STACK_SIZE];
 static struct k_thread tls_thread;

 void main(void)
 {
 	k_thread_create(&tls_thread, stack, STACK_SIZE,
 			(k_thread_entry_t) tls_client,
 			NULL, NULL, NULL, K_PRIO_COOP(7), 0, 0);
 }
	/*
	* 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
	*
	* This file is part of mbed TLS (https://tls.mbed.org)
	*/

	#include <zephyr.h>
	#if defined(CONFIG_STDOUT_CONSOLE)
	#include <stdio.h>
	#define PRINT printf
	#else
	#include <misc/printk.h>
	#define PRINT printk
	#endif

	#include <errno.h>

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

	#if defined(MBEDTLS_PLATFORM_C)
	#include "mbedtls/platform.h"
	#else
	#include <stdlib.h>
	#define mbedtls_time_t time_t
	#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
	#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
	#endif

	#include <string.h>
	#include "tcp.h"
	#include "tcp_cfg.h"

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

	#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
	#include "mbedtls/memory_buffer_alloc.h"
	static unsigned char heap[20480];
	#endif

	/*
	* Hardcoded values for server host and port
	*/
	#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,
	};

	static int entropy_source(void data, unsigned char output, size_t len,
	size_t *olen)
	{
	u32_t seed;

	ARG_UNUSED(data);

	seed = sys_rand32_get();

	if (len > sizeof(seed)) {
	len = sizeof(seed);
	}

	memcpy(output, &seed, len);

	*olen = len;

	return 0;
	}

	void tls_client(void)
	{
	int ret = exit_ok;
	struct tcp_context ctx;

	ctx.timeout = MBEDTLS_NETWORK_TIMEOUT;

	#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);

	mbedtls_platform_set_printf(PRINT);

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

	mbedtls_printf("\n . Seeding the random number generator...");
	mbedtls_entropy_init(&entropy);
	mbedtls_entropy_add_source(&entropy, entropy_source, NULL,
	MBEDTLS_ENTROPY_MAX_GATHER,
	MBEDTLS_ENTROPY_SOURCE_STRONG);

	if (mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
	(const unsigned char *)pers,
	strlen(pers)) != 0) {
	ret = ctr_drbg_seed_failed;
	mbedtls_printf
	(" failed\n ! mbedtls_ctr_drbg_seed returned -0x%x\n",
	-ret);
	goto exit;
	}
	mbedtls_printf(" ok\n");

	mbedtls_printf(" . Setting up the SSL/TLS structure...");
	if (mbedtls_ssl_config_defaults(&conf,
	MBEDTLS_SSL_IS_CLIENT,
	MBEDTLS_SSL_TRANSPORT_STREAM,
	MBEDTLS_SSL_PRESET_DEFAULT) != 0) {
	ret = ssl_config_defaults_failed;
	mbedtls_printf
	(" failed\n ! mbedtls_ssl_config_defaults returned -0x%x\n\n",
	-ret);
	goto exit;
	}

	mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);

	#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
	mbedtls_memory_buffer_alloc_init(heap, sizeof(heap));
	#endif

	#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;
	mbedtls_printf
	(" failed\n ! mbedtls_x509_crt_parse returned -0x%x\n\n",
	-ret);
	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;
	mbedtls_printf
	(" failed\n ! mbedtls_ssl_setup returned -0x%x\n\n", -ret);
	goto exit;
	}
	#if defined(MBEDTLS_X509_CRT_PARSE_C)
	if (mbedtls_ssl_set_hostname(&ssl, HOSTNAME) != 0) {
	ret = hostname_failed;
	mbedtls_printf
	(" failed\n ! mbedtls_ssl_set_hostname returned %d\n\n",
	ret);
	goto exit;
	}
	#endif
	mbedtls_printf(" ok\n");

	/*
	* 1. Start the connection
	*/

	mbedtls_printf(" . Connecting to tcp %s...", SERVER_ADDR);

	if (tcp_set_local_addr(&ctx, LOCAL_ADDR) != 0) {
	printk("tcp set_local_addr error\n");
	goto exit;
	}

	if (tcp_init(&ctx, SERVER_ADDR, SERVER_PORT) != 0) {
	ret = connect_failed;
	mbedtls_printf(" failed\n ! tcp_init returned -0x%x\n\n",
	-ret);
	goto exit;
	}

	mbedtls_printf(" ok\n");

	mbedtls_ssl_set_bio(&ssl, &ctx, tcp_tx, tcp_rx, NULL);

	mbedtls_printf(" . Performing the SSL/TLS handshake...");
	if (mbedtls_ssl_handshake(&ssl) != 0) {
	ret = ssl_handshake_failed;
	mbedtls_printf
	(" failed\n ! mbedtls_ssl_handshake returned -0x%x\n",
	-ret);
	goto exit;
	}
	mbedtls_printf(" ok\n");

	/*
	* 2. Write the GET request and close the connection
	*/
	mbedtls_printf(" > Write to server:");
	if (mbedtls_ssl_write(&ssl, (const unsigned char *)GET_REQUEST,
	sizeof(GET_REQUEST) - 1) <= 0) {
	ret = ssl_write_failed;
	mbedtls_printf
	(" failed\n ! mbedtls_ssl_write returned -0x%x\n\n", -ret);
	goto exit;
	}
	mbedtls_printf(" ok\n");

	mbedtls_printf(" . Closing the connection...");
	mbedtls_ssl_close_notify(&ssl);
	mbedtls_printf(" done\n");
	exit:

	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

	}

	#define STACK_SIZE 8192
	u8_t stack[STACK_SIZE];
	static struct k_thread tls_thread;

	void main(void)
	{
	k_thread_create(&tls_thread, stack, STACK_SIZE,
	(k_thread_entry_t) tls_client,
	NULL, NULL, NULL, K_PRIO_COOP(7), 0, 0);
	}