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

 /*
  *  SSL server demonstration program using fork() for handling multiple clients
  *
  *  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 <unistd.h>
 #include <signal.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/timing.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"

 #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 );
 }
 #elif defined(_WIN32)
 int main( int argc, char *argv[] )
 {
     ((void) argc);
     ((void) argv);

     printf("_WIN32 defined. This application requires fork() and signals "
            "to work correctly.\n");
     return( 0 );
 }
 #else
 /*
  * Computing a "safe" DH-1024 prime can take a very
  * long time, so a precomputed value is provided below.
  * You may run dh_genprime to generate a new value.
  */
 char *my_dhm_P =
     "E4004C1F94182000103D883A448B3F80" \
     "2CE4B44A83301270002C20D0321CFD00" \
     "11CCEF784C26A400F43DFB901BCA7538" \
     "F2C6B176001CF5A0FD16D2C48B1D0C1C" \
     "F6AC8E1DA6BCC3B4E1F96B0564965300" \
     "FFA1D0B601EB2800F489AA512C4B248C" \
     "01F76949A60BB7F00A40B1EAB64BDD48" \
     "E8A700D60B7F1200FA8E77B0A979DABF";

 char *my_dhm_G = "4";

 /*
  * Sorted by order of preference
  */
 int my_ciphersuites[] =
 {
     SSL_EDH_RSA_AES_256_SHA,
     SSL_EDH_RSA_CAMELLIA_256_SHA,
     SSL_EDH_RSA_AES_128_SHA,
     SSL_EDH_RSA_CAMELLIA_128_SHA,
     SSL_EDH_RSA_DES_168_SHA,
     SSL_RSA_AES_256_SHA,
     SSL_RSA_CAMELLIA_256_SHA,
     SSL_RSA_AES_128_SHA,
     SSL_RSA_CAMELLIA_128_SHA,
     SSL_RSA_DES_168_SHA,
     SSL_RSA_RC4_128_SHA,
     SSL_RSA_RC4_128_MD5,
     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 && 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 && 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 );
 }

 int main( int argc, char *argv[] )
 {
     int ret, len, cnt = 0, pid;
     int listen_fd;
     int client_fd;
     unsigned char buf[1024];
     char *pers = "ssl_fork_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);

     signal( SIGCHLD, SIG_IGN );

     /*
      * 0. Initial seeding of the RNG
      */
     printf( "\n  . Initial seeding of the random 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" );

     /*
      * 1. Load the certificates and private RSA key
      */
     printf( "  . 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" );

     while( 1 )
     {
         /*
          * 3. Wait until a client connects
          */
         client_fd = -1;
         memset( &ssl, 0, sizeof( ssl ) );

         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;
         }

         printf( " ok\n" );

         /*
          * 3.5. Forking server thread
          */

         pid = fork();

         printf( "  . Forking to handle connection ..." );
         fflush( stdout );

         if( pid < 0 )
         {
             printf(" failed\n  ! fork returned %d\n\n", pid );
             goto exit;
         }

         printf( " ok\n" );

         if( pid != 0 )
         {
             if( ( ret = ctr_drbg_reseed( &ctr_drbg,
                                          (unsigned char* ) "parent", 6 ) ) != 0 )
             {
                 printf( " failed\n  ! ctr_drbg_reseed returned %d\n", ret );
                 goto exit;
             }

             close( client_fd );
             continue;
         }

         close( listen_fd );

         /*
          * 4. Setup stuff
          */
         printf( "  . Setting up the SSL data...." );
         fflush( stdout );

         if( ( ret = ctr_drbg_reseed( &ctr_drbg,
                                      (unsigned char *) "child", 5 ) ) != 0 )
         {
             printf( " failed\n  ! ctr_drbg_reseed returned %d\n", ret );
             goto exit;
         }

         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_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_bio( &ssl, net_recv, &client_fd,
                            net_send, &client_fd );
         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 );
         ssl_set_dh_param( &ssl, my_dhm_P, my_dhm_G );

         /*
          * 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 exit;
             }
         }

         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 %d\n", ret );
                         break;
                 }

                 break;
             }

             len = ret;
             printf( " %d bytes read\n\n%s", len, (char *) buf );
         }
         while( 0 );

         /*
          * 7. Write the 200 Response
          */
         printf( "  > Write to client:" );
         fflush( stdout );

         len = sprintf( (char *) buf, HTTP_RESPONSE,
                 ssl_get_ciphersuite( &ssl ) );

         while( cnt < 100 )
         {
             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 exit;
                 }

                 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 );

             m_sleep( 1000 );
         }

         ssl_close_notify( &ssl );
         goto exit;
     }

 exit:

     net_close( client_fd );
     x509_free( &srvcert );
     rsa_free( &rsa );
     ssl_free( &ssl );

     cur = s_list_1st;
     while( cur != NULL )
     {
         prv = cur;
         cur = cur->next;
         memset( prv, 0, sizeof( ssl_session ) );
         free( prv );
     }

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

 #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 */
	/*
	* SSL server demonstration program using fork() for handling multiple clients
	*
	* 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 <unistd.h>
	#include <signal.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/timing.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"

	#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 );
	}
	#elif defined(_WIN32)
	int main( int argc, char *argv[] )
	{
	((void) argc);
	((void) argv);

	printf("_WIN32 defined. This application requires fork() and signals "
	"to work correctly.\n");
	return( 0 );
	}
	#else
	/*
	* Computing a "safe" DH-1024 prime can take a very
	* long time, so a precomputed value is provided below.
	* You may run dh_genprime to generate a new value.
	*/
	char *my_dhm_P =
	"E4004C1F94182000103D883A448B3F80" \
	"2CE4B44A83301270002C20D0321CFD00" \
	"11CCEF784C26A400F43DFB901BCA7538" \
	"F2C6B176001CF5A0FD16D2C48B1D0C1C" \
	"F6AC8E1DA6BCC3B4E1F96B0564965300" \
	"FFA1D0B601EB2800F489AA512C4B248C" \
	"01F76949A60BB7F00A40B1EAB64BDD48" \
	"E8A700D60B7F1200FA8E77B0A979DABF";

	char *my_dhm_G = "4";

	/*
	* Sorted by order of preference
	*/
	int my_ciphersuites[] =
	{
	SSL_EDH_RSA_AES_256_SHA,
	SSL_EDH_RSA_CAMELLIA_256_SHA,
	SSL_EDH_RSA_AES_128_SHA,
	SSL_EDH_RSA_CAMELLIA_128_SHA,
	SSL_EDH_RSA_DES_168_SHA,
	SSL_RSA_AES_256_SHA,
	SSL_RSA_CAMELLIA_256_SHA,
	SSL_RSA_AES_128_SHA,
	SSL_RSA_CAMELLIA_128_SHA,
	SSL_RSA_DES_168_SHA,
	SSL_RSA_RC4_128_SHA,
	SSL_RSA_RC4_128_MD5,
	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 && 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 && 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 );
	}

	int main( int argc, char *argv[] )
	{
	int ret, len, cnt = 0, pid;
	int listen_fd;
	int client_fd;
	unsigned char buf[1024];
	char *pers = "ssl_fork_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);

	signal( SIGCHLD, SIG_IGN );

	/*
	* 0. Initial seeding of the RNG
	*/
	printf( "\n . Initial seeding of the random 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" );

	/*
	* 1. Load the certificates and private RSA key
	*/
	printf( " . 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" );

	while( 1 )
	{
	/*
	* 3. Wait until a client connects
	*/
	client_fd = -1;
	memset( &ssl, 0, sizeof( ssl ) );

	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;
	}

	printf( " ok\n" );

	/*
	* 3.5. Forking server thread
	*/

	pid = fork();

	printf( " . Forking to handle connection ..." );
	fflush( stdout );

	if( pid < 0 )
	{
	printf(" failed\n ! fork returned %d\n\n", pid );
	goto exit;
	}

	printf( " ok\n" );

	if( pid != 0 )
	{
	if( ( ret = ctr_drbg_reseed( &ctr_drbg,
	(unsigned char* ) "parent", 6 ) ) != 0 )
	{
	printf( " failed\n ! ctr_drbg_reseed returned %d\n", ret );
	goto exit;
	}

	close( client_fd );
	continue;
	}

	close( listen_fd );

	/*
	* 4. Setup stuff
	*/
	printf( " . Setting up the SSL data...." );
	fflush( stdout );

	if( ( ret = ctr_drbg_reseed( &ctr_drbg,
	(unsigned char *) "child", 5 ) ) != 0 )
	{
	printf( " failed\n ! ctr_drbg_reseed returned %d\n", ret );
	goto exit;
	}

	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_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_bio( &ssl, net_recv, &client_fd,
	net_send, &client_fd );
	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 );
	ssl_set_dh_param( &ssl, my_dhm_P, my_dhm_G );

	/*
	* 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 exit;
	}
	}

	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 %d\n", ret );
	break;
	}

	break;
	}

	len = ret;
	printf( " %d bytes read\n\n%s", len, (char *) buf );
	}
	while( 0 );

	/*
	* 7. Write the 200 Response
	*/
	printf( " > Write to client:" );
	fflush( stdout );

	len = sprintf( (char *) buf, HTTP_RESPONSE,
	ssl_get_ciphersuite( &ssl ) );

	while( cnt < 100 )
	{
	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 exit;
	}

	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 );

	m_sleep( 1000 );
	}

	ssl_close_notify( &ssl );
	goto exit;
	}

	exit:

	net_close( client_fd );
	x509_free( &srvcert );
	rsa_free( &rsa );
	ssl_free( &ssl );

	cur = s_list_1st;
	while( cur != NULL )
	{
	prv = cur;
	cur = cur->next;
	memset( prv, 0, sizeof( ssl_session ) );
	free( prv );
	}

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

	#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 */