- Added ssl_fork_server example program
diff --git a/programs/ssl/ssl_fork_server.c b/programs/ssl/ssl_fork_server.c
new file mode 100644
index 0000000..cba605f
--- /dev/null
+++ b/programs/ssl/ssl_fork_server.c
@@ -0,0 +1,438 @@
+/*
+ * SSL server demonstration program
+ *
+ * Copyright (C) 2006-2010, 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
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+
+#include "polarssl/havege.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"
+
+/*
+ * 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( void )
+{
+ int ret, len, cnt = 0, pid;
+ int listen_fd;
+ int client_fd;
+ unsigned char buf[1024];
+
+ havege_state hs;
+ ssl_context ssl;
+ ssl_session ssn;
+ x509_cert srvcert;
+ rsa_context rsa;
+
+ signal( SIGCHLD, SIG_IGN );
+
+ /*
+ * 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" );
+
+ 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 )
+ {
+ close( client_fd );
+ continue;
+ }
+
+ close( listen_fd );
+
+ /*
+ * 4. Setup stuff
+ */
+ printf( " . Setting up the RNG and SSL data...." );
+ fflush( stdout );
+
+ havege_init( &hs );
+
+ 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, havege_rand, &hs );
+ 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 ) );
+
+#ifdef WIN32
+ printf( " Press Enter to exit this program.\n" );
+ fflush( stdout ); getchar();
+#endif
+
+ return( ret );
+}