378 lines
10 KiB
C
378 lines
10 KiB
C
/*
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* SSL server demonstration program using fork() for handling multiple clients
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "polarssl/config.h"
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#if defined(_WIN32)
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#include <windows.h>
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <signal.h>
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#if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32)
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#include <unistd.h>
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#endif
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#include "polarssl/entropy.h"
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#include "polarssl/ctr_drbg.h"
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#include "polarssl/certs.h"
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#include "polarssl/x509.h"
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#include "polarssl/ssl.h"
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#include "polarssl/net.h"
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#include "polarssl/timing.h"
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#define HTTP_RESPONSE \
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"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
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"<h2>PolarSSL Test Server</h2>\r\n" \
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"<p>Successful connection using: %s</p>\r\n"
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#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_CERTS_C) || \
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!defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_SSL_TLS_C) || \
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!defined(POLARSSL_SSL_SRV_C) || !defined(POLARSSL_NET_C) || \
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!defined(POLARSSL_RSA_C) || !defined(POLARSSL_CTR_DRBG_C) || \
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!defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_TIMING_C)
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int main( int argc, char *argv[] )
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{
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((void) argc);
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((void) argv);
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printf("POLARSSL_BIGNUM_C and/or POLARSSL_CERTS_C and/or POLARSSL_ENTROPY_C "
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"and/or POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_SRV_C and/or "
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"POLARSSL_NET_C and/or POLARSSL_RSA_C and/or "
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"POLARSSL_CTR_DRBG_C and/or POLARSSL_X509_CRT_PARSE_C and/or "
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"POLARSSL_TIMING_C not defined.\n");
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return( 0 );
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}
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#elif defined(_WIN32)
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int main( int argc, char *argv[] )
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{
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((void) argc);
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((void) argv);
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printf("_WIN32 defined. This application requires fork() and signals "
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"to work correctly.\n");
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return( 0 );
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}
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#else
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#define DEBUG_LEVEL 0
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static void my_debug( void *ctx, int level, const char *str )
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{
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if( level < DEBUG_LEVEL )
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{
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fprintf( (FILE *) ctx, "%s", str );
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fflush( (FILE *) ctx );
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}
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}
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int main( int argc, char *argv[] )
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{
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int ret, len, cnt = 0, pid;
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int listen_fd;
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int client_fd = -1;
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unsigned char buf[1024];
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const char *pers = "ssl_fork_server";
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entropy_context entropy;
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ctr_drbg_context ctr_drbg;
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ssl_context ssl;
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x509_crt srvcert;
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pk_context pkey;
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((void) argc);
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((void) argv);
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signal( SIGCHLD, SIG_IGN );
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/*
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* 0. Initial seeding of the RNG
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*/
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printf( "\n . Initial seeding of the random generator..." );
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fflush( stdout );
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entropy_init( &entropy );
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if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
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(const unsigned char *) pers,
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strlen( pers ) ) ) != 0 )
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{
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printf( " failed\n ! ctr_drbg_init returned %d\n", ret );
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goto exit;
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}
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printf( " ok\n" );
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/*
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* 1. Load the certificates and private RSA key
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*/
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printf( " . Loading the server cert. and key..." );
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fflush( stdout );
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x509_crt_init( &srvcert );
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/*
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* This demonstration program uses embedded test certificates.
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* Instead, you may want to use x509_crt_parse_file() to read the
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* server and CA certificates, as well as pk_parse_keyfile().
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*/
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ret = x509_crt_parse( &srvcert, (const unsigned char *) test_srv_crt,
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strlen( test_srv_crt ) );
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if( ret != 0 )
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{
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printf( " failed\n ! x509_crt_parse returned %d\n\n", ret );
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goto exit;
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}
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ret = x509_crt_parse( &srvcert, (const unsigned char *) test_ca_list,
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strlen( test_ca_list ) );
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if( ret != 0 )
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{
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printf( " failed\n ! x509_crt_parse returned %d\n\n", ret );
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goto exit;
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}
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pk_init( &pkey );
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ret = pk_parse_key( &pkey, (const unsigned char *) test_srv_key,
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strlen( test_srv_key ), NULL, 0 );
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if( ret != 0 )
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{
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printf( " failed\n ! pk_parse_key returned %d\n\n", ret );
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goto exit;
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}
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printf( " ok\n" );
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/*
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* 2. Setup the listening TCP socket
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*/
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printf( " . Bind on https://localhost:4433/ ..." );
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fflush( stdout );
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if( ( ret = net_bind( &listen_fd, NULL, 4433 ) ) != 0 )
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{
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printf( " failed\n ! net_bind returned %d\n\n", ret );
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goto exit;
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}
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printf( " ok\n" );
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while( 1 )
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{
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/*
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* 3. Wait until a client connects
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*/
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client_fd = -1;
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memset( &ssl, 0, sizeof( ssl ) );
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printf( " . Waiting for a remote connection ..." );
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fflush( stdout );
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if( ( ret = net_accept( listen_fd, &client_fd, NULL ) ) != 0 )
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{
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printf( " failed\n ! net_accept returned %d\n\n", ret );
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goto exit;
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}
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printf( " ok\n" );
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/*
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* 3.5. Forking server thread
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*/
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pid = fork();
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printf( " . Forking to handle connection ..." );
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fflush( stdout );
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if( pid < 0 )
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{
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printf(" failed\n ! fork returned %d\n\n", pid );
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goto exit;
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}
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printf( " ok\n" );
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if( pid != 0 )
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{
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if( ( ret = ctr_drbg_reseed( &ctr_drbg,
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(const unsigned char *) "parent",
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6 ) ) != 0 )
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{
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printf( " failed\n ! ctr_drbg_reseed returned %d\n", ret );
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goto exit;
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}
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close( client_fd );
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continue;
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}
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close( listen_fd );
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/*
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* 4. Setup stuff
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*/
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printf( " . Setting up the SSL data...." );
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fflush( stdout );
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if( ( ret = ctr_drbg_reseed( &ctr_drbg,
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(const unsigned char *) "child",
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5 ) ) != 0 )
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{
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printf( " failed\n ! ctr_drbg_reseed returned %d\n", ret );
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goto exit;
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}
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if( ( ret = ssl_init( &ssl ) ) != 0 )
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{
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printf( " failed\n ! ssl_init returned %d\n\n", ret );
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goto exit;
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}
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printf( " ok\n" );
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ssl_set_endpoint( &ssl, SSL_IS_SERVER );
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ssl_set_authmode( &ssl, SSL_VERIFY_NONE );
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ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
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ssl_set_dbg( &ssl, my_debug, stdout );
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ssl_set_bio( &ssl, net_recv, &client_fd,
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net_send, &client_fd );
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ssl_set_ca_chain( &ssl, srvcert.next, NULL, NULL );
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ssl_set_own_cert( &ssl, &srvcert, &pkey );
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/*
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* 5. Handshake
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*/
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printf( " . Performing the SSL/TLS handshake..." );
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fflush( stdout );
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while( ( ret = ssl_handshake( &ssl ) ) != 0 )
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{
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if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
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{
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printf( " failed\n ! ssl_handshake returned %d\n\n", ret );
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goto exit;
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}
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}
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printf( " ok\n" );
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/*
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* 6. Read the HTTP Request
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*/
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printf( " < Read from client:" );
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fflush( stdout );
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do
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{
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len = sizeof( buf ) - 1;
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memset( buf, 0, sizeof( buf ) );
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ret = ssl_read( &ssl, buf, len );
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if( ret == POLARSSL_ERR_NET_WANT_READ || ret == POLARSSL_ERR_NET_WANT_WRITE )
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continue;
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if( ret <= 0 )
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{
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switch( ret )
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{
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case POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY:
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printf( " connection was closed gracefully\n" );
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break;
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case POLARSSL_ERR_NET_CONN_RESET:
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printf( " connection was reset by peer\n" );
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break;
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default:
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printf( " ssl_read returned %d\n", ret );
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break;
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}
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break;
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}
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len = ret;
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printf( " %d bytes read\n\n%s", len, (char *) buf );
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}
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while( 0 );
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/*
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* 7. Write the 200 Response
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*/
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printf( " > Write to client:" );
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fflush( stdout );
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len = sprintf( (char *) buf, HTTP_RESPONSE,
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ssl_get_ciphersuite( &ssl ) );
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while( cnt < 100 )
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{
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while( ( ret = ssl_write( &ssl, buf, len ) ) <= 0 )
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{
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if( ret == POLARSSL_ERR_NET_CONN_RESET )
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{
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printf( " failed\n ! peer closed the connection\n\n" );
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goto exit;
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}
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if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
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{
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printf( " failed\n ! ssl_write returned %d\n\n", ret );
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goto exit;
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}
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}
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len = ret;
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printf( " %d bytes written\n\n%s\n", len, (char *) buf );
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m_sleep( 1000 );
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}
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ssl_close_notify( &ssl );
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goto exit;
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}
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exit:
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net_close( client_fd );
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x509_crt_free( &srvcert );
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pk_free( &pkey );
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ssl_free( &ssl );
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entropy_free( &entropy );
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#if defined(_WIN32)
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printf( " Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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return( ret );
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}
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#endif /* POLARSSL_BIGNUM_C && POLARSSL_CERTS_C && POLARSSL_ENTROPY_C &&
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POLARSSL_SSL_TLS_C && POLARSSL_SSL_SRV_C && POLARSSL_NET_C &&
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POLARSSL_RSA_C && POLARSSL_CTR_DRBG_C */
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