programs/ssl/ssl_client1.c - security/mbedtls - Rivoreo Source Code Repositories

 /*
  *  SSL client demonstration program
  *
  *  Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
  *
  *  This file is part of mbed TLS (https://www.polarssl.org)
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

 #if !defined(POLARSSL_CONFIG_FILE)
 #include "polarssl/config.h"
 #else
 #include POLARSSL_CONFIG_FILE
 #endif

 #include <string.h>
 #include <stdio.h>

 #include "polarssl/net.h"
 #include "polarssl/debug.h"
 #include "polarssl/ssl.h"
 #include "polarssl/entropy.h"
 #include "polarssl/ctr_drbg.h"
 #include "polarssl/error.h"
 #include "polarssl/certs.h"

 #if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_ENTROPY_C) ||  \
     !defined(POLARSSL_SSL_TLS_C) || !defined(POLARSSL_SSL_CLI_C) || \
     !defined(POLARSSL_NET_C) || !defined(POLARSSL_RSA_C) ||         \
     !defined(POLARSSL_CTR_DRBG_C) || !defined(POLARSSL_X509_CRT_PARSE_C)
 int main( int argc, char *argv[] )
 {
     ((void) argc);
     ((void) argv);

     printf("POLARSSL_BIGNUM_C and/or POLARSSL_ENTROPY_C and/or "
            "POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_CLI_C and/or "
            "POLARSSL_NET_C and/or POLARSSL_RSA_C and/or "
            "POLARSSL_CTR_DRBG_C and/or POLARSSL_X509_CRT_PARSE_C "
            "not defined.\n");
     return( 0 );
 }
 #else

 #define SERVER_PORT 4433
 #define SERVER_NAME "localhost"
 #define GET_REQUEST "GET / HTTP/1.0\r\n\r\n"

 #define DEBUG_LEVEL 1

 static void my_debug( void *ctx, int level, const char *str )
 {
     ((void) level);

     fprintf( (FILE *) ctx, "%s", str );
     fflush(  (FILE *) ctx  );
 }

 int main( int argc, char *argv[] )
 {
     int ret, len, server_fd = -1;
     unsigned char buf[1024];
     const char *pers = "ssl_client1";

     entropy_context entropy;
     ctr_drbg_context ctr_drbg;
     ssl_context ssl;
     x509_crt cacert;

     ((void) argc);
     ((void) argv);

 #if defined(POLARSSL_DEBUG_C)
     debug_set_threshold( DEBUG_LEVEL );
 #endif

     /*
      * 0. Initialize the RNG and the session data
      */
     memset( &ssl, 0, sizeof( ssl_context ) );
     x509_crt_init( &cacert );

     printf( "\n  . Seeding the random number generator..." );
     fflush( stdout );

     entropy_init( &entropy );
     if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
                                (const unsigned char *) pers,
                                strlen( pers ) ) ) != 0 )
     {
         printf( " failed\n  ! ctr_drbg_init returned %d\n", ret );
         goto exit;
     }

     printf( " ok\n" );

     /*
      * 0. Initialize certificates
      */
     printf( "  . Loading the CA root certificate ..." );
     fflush( stdout );

 #if defined(POLARSSL_CERTS_C)
     ret = x509_crt_parse( &cacert, (const unsigned char *) test_ca_list,
                           strlen( test_ca_list ) );
 #else
     ret = 1;
     printf("POLARSSL_CERTS_C not defined.");
 #endif

     if( ret < 0 )
     {
         printf( " failed\n  !  x509_crt_parse returned -0x%x\n\n", -ret );
         goto exit;
     }

     printf( " ok (%d skipped)\n", ret );

     /*
      * 1. Start the connection
      */
     printf( "  . Connecting to tcp/%s/%4d...", SERVER_NAME,
                                                SERVER_PORT );
     fflush( stdout );

     if( ( ret = net_connect( &server_fd, SERVER_NAME,
                                          SERVER_PORT ) ) != 0 )
     {
         printf( " failed\n  ! net_connect returned %d\n\n", ret );
         goto exit;
     }

     printf( " ok\n" );

     /*
      * 2. Setup stuff
      */
     printf( "  . Setting up the SSL/TLS structure..." );
     fflush( stdout );

     if( ( ret = ssl_init( &ssl ) ) != 0 )
     {
         printf( " failed\n  ! ssl_init returned %d\n\n", ret );
         goto exit;
     }

     printf( " ok\n" );

     ssl_set_endpoint( &ssl, SSL_IS_CLIENT );
     /* OPTIONAL is not optimal for security,
      * but makes interop easier in this simplified example */
     ssl_set_authmode( &ssl, SSL_VERIFY_OPTIONAL );
     ssl_set_ca_chain( &ssl, &cacert, NULL, "PolarSSL Server 1" );

     /* SSLv3 is deprecated, set minimum to TLS 1.0 */
     ssl_set_min_version( &ssl, SSL_MAJOR_VERSION_3, SSL_MINOR_VERSION_1 );
     /* RC4 is deprecated, disable it */
     ssl_set_arc4_support( &ssl, SSL_ARC4_DISABLED );

     ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
     ssl_set_dbg( &ssl, my_debug, stdout );
     ssl_set_bio( &ssl, net_recv, &server_fd,
                        net_send, &server_fd );

     /*
      * 4. Handshake
      */
     printf( "  . Performing the SSL/TLS handshake..." );
     fflush( stdout );

     while( ( ret = ssl_handshake( &ssl ) ) != 0 )
     {
         if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
         {
             printf( " failed\n  ! ssl_handshake returned -0x%x\n\n", -ret );
             goto exit;
         }
     }

     printf( " ok\n" );

     /*
      * 5. Verify the server certificate
      */
     printf( "  . Verifying peer X.509 certificate..." );

     /* In real life, we may want to bail out when ret != 0 */
     if( ( ret = ssl_get_verify_result( &ssl ) ) != 0 )
     {
         printf( " failed\n" );

         if( ( ret & BADCERT_EXPIRED ) != 0 )
             printf( "  ! server certificate has expired\n" );

         if( ( ret & BADCERT_REVOKED ) != 0 )
             printf( "  ! server certificate has been revoked\n" );

         if( ( ret & BADCERT_CN_MISMATCH ) != 0 )
             printf( "  ! CN mismatch (expected CN=%s)\n", "PolarSSL Server 1" );

         if( ( ret & BADCERT_NOT_TRUSTED ) != 0 )
             printf( "  ! self-signed or not signed by a trusted CA\n" );

         printf( "\n" );
     }
     else
         printf( " ok\n" );

     /*
      * 3. Write the GET request
      */
     printf( "  > Write to server:" );
     fflush( stdout );

     len = sprintf( (char *) buf, GET_REQUEST );

     while( ( ret = ssl_write( &ssl, buf, len ) ) <= 0 )
     {
         if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
         {
             printf( " failed\n  ! ssl_write returned %d\n\n", ret );
             goto exit;
         }
     }

     len = ret;
     printf( " %d bytes written\n\n%s", len, (char *) buf );

     /*
      * 7. Read the HTTP response
      */
     printf( "  < Read from server:" );
     fflush( stdout );

     do
     {
         len = sizeof( buf ) - 1;
         memset( buf, 0, sizeof( buf ) );
         ret = ssl_read( &ssl, buf, len );

         if( ret == POLARSSL_ERR_NET_WANT_READ || ret == POLARSSL_ERR_NET_WANT_WRITE )
             continue;

         if( ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY )
             break;

         if( ret < 0 )
         {
             printf( "failed\n  ! ssl_read returned %d\n\n", ret );
             break;
         }

         if( ret == 0 )
         {
             printf( "\n\nEOF\n\n" );
             break;
         }

         len = ret;
         printf( " %d bytes read\n\n%s", len, (char *) buf );
     }
     while( 1 );

     ssl_close_notify( &ssl );

 exit:

 #ifdef POLARSSL_ERROR_C
     if( ret != 0 )
     {
         char error_buf[100];
         polarssl_strerror( ret, error_buf, 100 );
         printf("Last error was: %d - %s\n\n", ret, error_buf );
     }
 #endif

     if( server_fd != -1 )
         net_close( server_fd );

     x509_crt_free( &cacert );
     ssl_free( &ssl );
     ctr_drbg_free( &ctr_drbg );
     entropy_free( &entropy );

     memset( &ssl, 0, sizeof( ssl ) );

 #if defined(_WIN32)
     printf( "  + Press Enter to exit this program.\n" );
     fflush( stdout ); getchar();
 #endif

     return( ret );
 }
 #endif /* POLARSSL_BIGNUM_C && POLARSSL_ENTROPY_C && POLARSSL_SSL_TLS_C &&
           POLARSSL_SSL_CLI_C && POLARSSL_NET_C && POLARSSL_RSA_C &&
           POLARSSL_CTR_DRBG_C */
	/*
	* SSL client demonstration program
	*
	* Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
	*
	* This file is part of mbed TLS (https://www.polarssl.org)
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/

	#if !defined(POLARSSL_CONFIG_FILE)
	#include "polarssl/config.h"
	#else
	#include POLARSSL_CONFIG_FILE
	#endif

	#include <string.h>
	#include <stdio.h>

	#include "polarssl/net.h"
	#include "polarssl/debug.h"
	#include "polarssl/ssl.h"
	#include "polarssl/entropy.h"
	#include "polarssl/ctr_drbg.h"
	#include "polarssl/error.h"
	#include "polarssl/certs.h"

	#if !defined(POLARSSL_BIGNUM_C) \|\| !defined(POLARSSL_ENTROPY_C) \|\| \
	!defined(POLARSSL_SSL_TLS_C) \|\| !defined(POLARSSL_SSL_CLI_C) \|\| \
	!defined(POLARSSL_NET_C) \|\| !defined(POLARSSL_RSA_C) \|\| \
	!defined(POLARSSL_CTR_DRBG_C) \|\| !defined(POLARSSL_X509_CRT_PARSE_C)
	int main( int argc, char *argv[] )
	{
	((void) argc);
	((void) argv);

	printf("POLARSSL_BIGNUM_C and/or POLARSSL_ENTROPY_C and/or "
	"POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_CLI_C and/or "
	"POLARSSL_NET_C and/or POLARSSL_RSA_C and/or "
	"POLARSSL_CTR_DRBG_C and/or POLARSSL_X509_CRT_PARSE_C "
	"not defined.\n");
	return( 0 );
	}
	#else

	#define SERVER_PORT 4433
	#define SERVER_NAME "localhost"
	#define GET_REQUEST "GET / HTTP/1.0\r\n\r\n"

	#define DEBUG_LEVEL 1

	static void my_debug( void ctx, int level, const char str )
	{
	((void) level);

	fprintf( (FILE *) ctx, "%s", str );
	fflush( (FILE *) ctx );
	}

	int main( int argc, char *argv[] )
	{
	int ret, len, server_fd = -1;
	unsigned char buf[1024];
	const char *pers = "ssl_client1";

	entropy_context entropy;
	ctr_drbg_context ctr_drbg;
	ssl_context ssl;
	x509_crt cacert;

	((void) argc);
	((void) argv);

	#if defined(POLARSSL_DEBUG_C)
	debug_set_threshold( DEBUG_LEVEL );
	#endif

	/*
	* 0. Initialize the RNG and the session data
	*/
	memset( &ssl, 0, sizeof( ssl_context ) );
	x509_crt_init( &cacert );

	printf( "\n . Seeding the random number generator..." );
	fflush( stdout );

	entropy_init( &entropy );
	if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
	(const unsigned char *) pers,
	strlen( pers ) ) ) != 0 )
	{
	printf( " failed\n ! ctr_drbg_init returned %d\n", ret );
	goto exit;
	}

	printf( " ok\n" );

	/*
	* 0. Initialize certificates
	*/
	printf( " . Loading the CA root certificate ..." );
	fflush( stdout );

	#if defined(POLARSSL_CERTS_C)
	ret = x509_crt_parse( &cacert, (const unsigned char *) test_ca_list,
	strlen( test_ca_list ) );
	#else
	ret = 1;
	printf("POLARSSL_CERTS_C not defined.");
	#endif

	if( ret < 0 )
	{
	printf( " failed\n ! x509_crt_parse returned -0x%x\n\n", -ret );
	goto exit;
	}

	printf( " ok (%d skipped)\n", ret );

	/*
	* 1. Start the connection
	*/
	printf( " . Connecting to tcp/%s/%4d...", SERVER_NAME,
	SERVER_PORT );
	fflush( stdout );

	if( ( ret = net_connect( &server_fd, SERVER_NAME,
	SERVER_PORT ) ) != 0 )
	{
	printf( " failed\n ! net_connect returned %d\n\n", ret );
	goto exit;
	}

	printf( " ok\n" );

	/*
	* 2. Setup stuff
	*/
	printf( " . Setting up the SSL/TLS structure..." );
	fflush( stdout );

	if( ( ret = ssl_init( &ssl ) ) != 0 )
	{
	printf( " failed\n ! ssl_init returned %d\n\n", ret );
	goto exit;
	}

	printf( " ok\n" );

	ssl_set_endpoint( &ssl, SSL_IS_CLIENT );
	/* OPTIONAL is not optimal for security,
	* but makes interop easier in this simplified example */
	ssl_set_authmode( &ssl, SSL_VERIFY_OPTIONAL );
	ssl_set_ca_chain( &ssl, &cacert, NULL, "PolarSSL Server 1" );

	/* SSLv3 is deprecated, set minimum to TLS 1.0 */
	ssl_set_min_version( &ssl, SSL_MAJOR_VERSION_3, SSL_MINOR_VERSION_1 );
	/* RC4 is deprecated, disable it */
	ssl_set_arc4_support( &ssl, SSL_ARC4_DISABLED );

	ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
	ssl_set_dbg( &ssl, my_debug, stdout );
	ssl_set_bio( &ssl, net_recv, &server_fd,
	net_send, &server_fd );

	/*
	* 4. Handshake
	*/
	printf( " . Performing the SSL/TLS handshake..." );
	fflush( stdout );

	while( ( ret = ssl_handshake( &ssl ) ) != 0 )
	{
	if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
	{
	printf( " failed\n ! ssl_handshake returned -0x%x\n\n", -ret );
	goto exit;
	}
	}

	printf( " ok\n" );

	/*
	* 5. Verify the server certificate
	*/
	printf( " . Verifying peer X.509 certificate..." );

	/* In real life, we may want to bail out when ret != 0 */
	if( ( ret = ssl_get_verify_result( &ssl ) ) != 0 )
	{
	printf( " failed\n" );

	if( ( ret & BADCERT_EXPIRED ) != 0 )
	printf( " ! server certificate has expired\n" );

	if( ( ret & BADCERT_REVOKED ) != 0 )
	printf( " ! server certificate has been revoked\n" );

	if( ( ret & BADCERT_CN_MISMATCH ) != 0 )
	printf( " ! CN mismatch (expected CN=%s)\n", "PolarSSL Server 1" );

	if( ( ret & BADCERT_NOT_TRUSTED ) != 0 )
	printf( " ! self-signed or not signed by a trusted CA\n" );

	printf( "\n" );
	}
	else
	printf( " ok\n" );

	/*
	* 3. Write the GET request
	*/
	printf( " > Write to server:" );
	fflush( stdout );

	len = sprintf( (char *) buf, GET_REQUEST );

	while( ( ret = ssl_write( &ssl, buf, len ) ) <= 0 )
	{
	if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
	{
	printf( " failed\n ! ssl_write returned %d\n\n", ret );
	goto exit;
	}
	}

	len = ret;
	printf( " %d bytes written\n\n%s", len, (char *) buf );

	/*
	* 7. Read the HTTP response
	*/
	printf( " < Read from server:" );
	fflush( stdout );

	do
	{
	len = sizeof( buf ) - 1;
	memset( buf, 0, sizeof( buf ) );
	ret = ssl_read( &ssl, buf, len );

	if( ret == POLARSSL_ERR_NET_WANT_READ \|\| ret == POLARSSL_ERR_NET_WANT_WRITE )
	continue;

	if( ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY )
	break;

	if( ret < 0 )
	{
	printf( "failed\n ! ssl_read returned %d\n\n", ret );
	break;
	}

	if( ret == 0 )
	{
	printf( "\n\nEOF\n\n" );
	break;
	}

	len = ret;
	printf( " %d bytes read\n\n%s", len, (char *) buf );
	}
	while( 1 );

	ssl_close_notify( &ssl );

	exit:

	#ifdef POLARSSL_ERROR_C
	if( ret != 0 )
	{
	char error_buf[100];
	polarssl_strerror( ret, error_buf, 100 );
	printf("Last error was: %d - %s\n\n", ret, error_buf );
	}
	#endif

	if( server_fd != -1 )
	net_close( server_fd );

	x509_crt_free( &cacert );
	ssl_free( &ssl );
	ctr_drbg_free( &ctr_drbg );
	entropy_free( &entropy );

	memset( &ssl, 0, sizeof( ssl ) );

	#if defined(_WIN32)
	printf( " + Press Enter to exit this program.\n" );
	fflush( stdout ); getchar();
	#endif

	return( ret );
	}
	#endif /* POLARSSL_BIGNUM_C && POLARSSL_ENTROPY_C && POLARSSL_SSL_TLS_C &&
	POLARSSL_SSL_CLI_C && POLARSSL_NET_C && POLARSSL_RSA_C &&
	POLARSSL_CTR_DRBG_C */