/programs/ssl/ssl_client1.c
C | 293 lines | 188 code | 55 blank | 50 comment | 44 complexity | f4df3f1d36f38b64932cda17df696bce MD5 | raw file
Possible License(s): GPL-2.0
- /*
- * SSL client demonstration program
- *
- * Copyright (C) 2006-2011, Brainspark B.V.
- *
- * This file is part of PolarSSL (http://www.polarssl.org)
- * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
- *
- * All rights reserved.
- *
- * 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.
- */
- #ifndef _CRT_SECURE_NO_DEPRECATE
- #define _CRT_SECURE_NO_DEPRECATE 1
- #endif
- #include <string.h>
- #include <stdio.h>
- #include "polarssl/config.h"
- #include "polarssl/net.h"
- #include "polarssl/ssl.h"
- #include "polarssl/entropy.h"
- #include "polarssl/ctr_drbg.h"
- #include "polarssl/error.h"
- #include "polarssl/certs.h"
- #define SERVER_PORT 4433
- #define SERVER_NAME "localhost"
- #define GET_REQUEST "GET / HTTP/1.0\r\n\r\n"
- #define DEBUG_LEVEL 1
- void my_debug( void *ctx, int level, const char *str )
- {
- if( level < DEBUG_LEVEL )
- {
- fprintf( (FILE *) ctx, "%s", str );
- fflush( (FILE *) ctx );
- }
- }
- #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)
- 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 not defined.\n");
- return( 0 );
- }
- #else
- int main( int argc, char *argv[] )
- {
- int ret, len, server_fd;
- unsigned char buf[1024];
- char *pers = "ssl_client1";
- entropy_context entropy;
- ctr_drbg_context ctr_drbg;
- ssl_context ssl;
- x509_cert cacert;
- ((void) argc);
- ((void) argv);
- /*
- * 0. Initialize the RNG and the session data
- */
- memset( &ssl, 0, sizeof( ssl_context ) );
- memset( &cacert, 0, sizeof( x509_cert ) );
- printf( "\n . Seeding the random number generator..." );
- fflush( stdout );
- entropy_init( &entropy );
- if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
- (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 = x509parse_crt( &cacert, (unsigned char *) test_ca_crt,
- strlen( test_ca_crt ) );
- #else
- ret = 1;
- printf("POLARSSL_CERTS_C not defined.");
- #endif
- if( ret < 0 )
- {
- printf( " failed\n ! x509parse_crt 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 );
- ssl_set_authmode( &ssl, SSL_VERIFY_OPTIONAL );
- ssl_set_ca_chain( &ssl, &cacert, NULL, "PolarSSL Server 1" );
- 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..." );
- 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];
- error_strerror( ret, error_buf, 100 );
- printf("Last error was: %d - %s\n\n", ret, error_buf );
- }
- #endif
- x509_free( &cacert );
- net_close( server_fd );
- ssl_free( &ssl );
- 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 */