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mbedtls/programs/ssl/ssl_server.c
Paul Bakker 29b64761fd - Added predefined DHM groups from RFC 5114
2012-09-25 09:36:44 +00:00

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/*
* SSL server 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
#if defined(_WIN32)
#include <windows.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "polarssl/config.h"
#include "polarssl/entropy.h"
#include "polarssl/ctr_drbg.h"
#include "polarssl/certs.h"
#include "polarssl/x509.h"
#include "polarssl/ssl.h"
#include "polarssl/net.h"
#include "polarssl/error.h"
#define HTTP_RESPONSE \
"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
"<h2>PolarSSL Test Server</h2>\r\n" \
"<p>Successful connection using: %s</p>\r\n"
/*
* Computing a "safe" DH prime can take a very
* long time. RFC 5114 provides precomputed and standardized
* values.
*/
char *my_dhm_P = POLARSSL_DHM_RFC5114_MODP_1024_P;
char *my_dhm_G = POLARSSL_DHM_RFC5114_MODP_1024_G;
/*
* Sorted by order of preference
*/
int my_ciphersuites[] =
{
#if defined(POLARSSL_DHM_C)
#if defined(POLARSSL_AES_C)
#if defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_AES_256_SHA256,
SSL_EDH_RSA_AES_128_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_EDH_RSA_AES_256_SHA,
SSL_EDH_RSA_AES_128_SHA,
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
SSL_EDH_RSA_AES_256_GCM_SHA384,
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_AES_128_GCM_SHA256,
#endif
#endif
#if defined(POLARSSL_CAMELLIA_C)
#if defined(POLARSSL_SHA2_C)
SSL_EDH_RSA_CAMELLIA_256_SHA256,
SSL_EDH_RSA_CAMELLIA_128_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_EDH_RSA_CAMELLIA_256_SHA,
SSL_EDH_RSA_CAMELLIA_128_SHA,
#endif
#if defined(POLARSSL_DES_C)
SSL_EDH_RSA_DES_168_SHA,
#endif
#endif
#if defined(POLARSSL_AES_C)
#if defined(POLARSSL_SHA2_C)
SSL_RSA_AES_256_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_RSA_AES_256_SHA,
#endif
#if defined(POLARSSL_CAMELLIA_C)
#if defined(POLARSSL_SHA2_C)
SSL_RSA_CAMELLIA_256_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_RSA_CAMELLIA_256_SHA,
#endif
#if defined(POLARSSL_AES_C)
#if defined(POLARSSL_SHA2_C)
SSL_RSA_AES_128_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_RSA_AES_128_SHA,
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
SSL_RSA_AES_256_GCM_SHA384,
#endif
#if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
SSL_RSA_AES_128_GCM_SHA256,
#endif
#endif
#if defined(POLARSSL_CAMELLIA_C)
#if defined(POLARSSL_SHA2_C)
SSL_RSA_CAMELLIA_128_SHA256,
#endif /* POLARSSL_SHA2_C */
SSL_RSA_CAMELLIA_128_SHA,
#endif
#if defined(POLARSSL_DES_C)
SSL_RSA_DES_168_SHA,
#endif
#if defined(POLARSSL_ARC4_C)
SSL_RSA_RC4_128_SHA,
SSL_RSA_RC4_128_MD5,
#endif
#if defined(POLARSSL_ENABLE_WEAK_CIPHERSUITES)
#if defined(POLARSSL_DES_C)
SSL_EDH_RSA_DES_SHA,
SSL_RSA_DES_SHA,
#endif
#if defined(POLARSSL_CIPHER_NULL_CIPHER)
SSL_RSA_NULL_MD5,
SSL_RSA_NULL_SHA,
SSL_RSA_NULL_SHA256,
#endif
#endif
0
};
#define DEBUG_LEVEL 0
void my_debug( void *ctx, int level, const char *str )
{
if( level < DEBUG_LEVEL )
{
fprintf( (FILE *) ctx, "%s", str );
fflush( (FILE *) ctx );
}
}
/*
* These session callbacks use a simple chained list
* to store and retrieve the session information.
*/
ssl_session *s_list_1st = NULL;
ssl_session *cur, *prv;
static int my_get_session( ssl_context *ssl )
{
time_t t = time( NULL );
if( ssl->resume == 0 )
return( 1 );
cur = s_list_1st;
prv = NULL;
while( cur != NULL )
{
prv = cur;
cur = cur->next;
if( ssl->timeout != 0 && (int) ( t - prv->start ) > ssl->timeout )
continue;
if( ssl->session->ciphersuite != prv->ciphersuite ||
ssl->session->length != prv->length )
continue;
if( memcmp( ssl->session->id, prv->id, prv->length ) != 0 )
continue;
memcpy( ssl->session->master, prv->master, 48 );
return( 0 );
}
return( 1 );
}
static int my_set_session( ssl_context *ssl )
{
time_t t = time( NULL );
cur = s_list_1st;
prv = NULL;
while( cur != NULL )
{
if( ssl->timeout != 0 && (int) ( t - cur->start ) > ssl->timeout )
break; /* expired, reuse this slot */
if( memcmp( ssl->session->id, cur->id, cur->length ) == 0 )
break; /* client reconnected */
prv = cur;
cur = cur->next;
}
if( cur == NULL )
{
cur = (ssl_session *) malloc( sizeof( ssl_session ) );
if( cur == NULL )
return( 1 );
if( prv == NULL )
s_list_1st = cur;
else prv->next = cur;
}
memcpy( cur, ssl->session, sizeof( ssl_session ) );
return( 0 );
}
#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_CERTS_C) || \
!defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_SSL_TLS_C) || \
!defined(POLARSSL_SSL_SRV_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_CERTS_C and/or POLARSSL_ENTROPY_C "
"and/or POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_SRV_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;
int listen_fd;
int client_fd = -1;
unsigned char buf[1024];
char *pers = "ssl_server";
entropy_context entropy;
ctr_drbg_context ctr_drbg;
ssl_context ssl;
ssl_session ssn;
x509_cert srvcert;
rsa_context rsa;
((void) argc);
((void) argv);
memset( &ssl, 0, sizeof( ssl_context ) );
/*
* 1. Load the certificates and private RSA key
*/
printf( "\n . Loading the server cert. and key..." );
fflush( stdout );
memset( &srvcert, 0, sizeof( x509_cert ) );
/*
* This demonstration program uses embedded test certificates.
* Instead, you may want to use x509parse_crtfile() to read the
* server and CA certificates, as well as x509parse_keyfile().
*/
ret = x509parse_crt( &srvcert, (unsigned char *) test_srv_crt,
strlen( test_srv_crt ) );
if( ret != 0 )
{
printf( " failed\n ! x509parse_crt returned %d\n\n", ret );
goto exit;
}
ret = x509parse_crt( &srvcert, (unsigned char *) test_ca_crt,
strlen( test_ca_crt ) );
if( ret != 0 )
{
printf( " failed\n ! x509parse_crt returned %d\n\n", ret );
goto exit;
}
rsa_init( &rsa, RSA_PKCS_V15, 0 );
ret = x509parse_key( &rsa, (unsigned char *) test_srv_key,
strlen( test_srv_key ), NULL, 0 );
if( ret != 0 )
{
printf( " failed\n ! x509parse_key returned %d\n\n", ret );
goto exit;
}
printf( " ok\n" );
/*
* 2. Setup the listening TCP socket
*/
printf( " . Bind on https://localhost:4433/ ..." );
fflush( stdout );
if( ( ret = net_bind( &listen_fd, NULL, 4433 ) ) != 0 )
{
printf( " failed\n ! net_bind returned %d\n\n", ret );
goto exit;
}
printf( " ok\n" );
/*
* 3. Seed the RNG
*/
printf( " . 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" );
/*
* 4. Setup stuff
*/
printf( " . Setting up the SSL data...." );
fflush( stdout );
if( ( ret = ssl_init( &ssl ) ) != 0 )
{
printf( " failed\n ! ssl_init returned %d\n\n", ret );
goto exit;
}
ssl_set_endpoint( &ssl, SSL_IS_SERVER );
ssl_set_authmode( &ssl, SSL_VERIFY_NONE );
ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
ssl_set_dbg( &ssl, my_debug, stdout );
ssl_set_scb( &ssl, my_get_session,
my_set_session );
ssl_set_ciphersuites( &ssl, my_ciphersuites );
ssl_set_session( &ssl, 1, 0, &ssn );
memset( &ssn, 0, sizeof( ssl_session ) );
ssl_set_ca_chain( &ssl, srvcert.next, NULL, NULL );
ssl_set_own_cert( &ssl, &srvcert, &rsa );
#if defined(POLARSSL_DHM_C)
ssl_set_dh_param( &ssl, my_dhm_P, my_dhm_G );
#endif
printf( " ok\n" );
reset:
#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
if( client_fd != -1 )
net_close( client_fd );
ssl_session_reset( &ssl );
/*
* 3. Wait until a client connects
*/
#if defined(_WIN32_WCE)
{
SHELLEXECUTEINFO sei;
ZeroMemory( &sei, sizeof( SHELLEXECUTEINFO ) );
sei.cbSize = sizeof( SHELLEXECUTEINFO );
sei.fMask = 0;
sei.hwnd = 0;
sei.lpVerb = _T( "open" );
sei.lpFile = _T( "https://localhost:4433/" );
sei.lpParameters = NULL;
sei.lpDirectory = NULL;
sei.nShow = SW_SHOWNORMAL;
ShellExecuteEx( &sei );
}
#elif defined(_WIN32)
ShellExecute( NULL, "open", "https://localhost:4433/",
NULL, NULL, SW_SHOWNORMAL );
#endif
client_fd = -1;
printf( " . Waiting for a remote connection ..." );
fflush( stdout );
if( ( ret = net_accept( listen_fd, &client_fd, NULL ) ) != 0 )
{
printf( " failed\n ! net_accept returned %d\n\n", ret );
goto exit;
}
ssl_set_bio( &ssl, net_recv, &client_fd,
net_send, &client_fd );
printf( " ok\n" );
/*
* 5. 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 %d\n\n", ret );
goto reset;
}
}
printf( " ok\n" );
/*
* 6. Read the HTTP Request
*/
printf( " < Read from client:" );
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 <= 0 )
{
switch( ret )
{
case POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY:
printf( " connection was closed gracefully\n" );
break;
case POLARSSL_ERR_NET_CONN_RESET:
printf( " connection was reset by peer\n" );
break;
default:
printf( " ssl_read returned -0x%x\n", -ret );
break;
}
break;
}
len = ret;
printf( " %d bytes read\n\n%s", len, (char *) buf );
if( ret > 0 )
break;
}
while( 1 );
/*
* 7. Write the 200 Response
*/
printf( " > Write to client:" );
fflush( stdout );
len = sprintf( (char *) buf, HTTP_RESPONSE,
ssl_get_ciphersuite( &ssl ) );
while( ( ret = ssl_write( &ssl, buf, len ) ) <= 0 )
{
if( ret == POLARSSL_ERR_NET_CONN_RESET )
{
printf( " failed\n ! peer closed the connection\n\n" );
goto reset;
}
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\n", len, (char *) buf );
ret = 0;
goto reset;
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
net_close( client_fd );
x509_free( &srvcert );
rsa_free( &rsa );
ssl_session_free( &ssn );
ssl_session_free( s_list_1st );
ssl_free( &ssl );
#if defined(_WIN32)
printf( " Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
#endif /* POLARSSL_BIGNUM_C && POLARSSL_CERTS_C && POLARSSL_ENTROPY_C &&
POLARSSL_SSL_TLS_C && POLARSSL_SSL_SRV_C && POLARSSL_NET_C &&
POLARSSL_RSA_C && POLARSSL_CTR_DRBG_C */
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