- Added ssl_fork_server example program

programs/Makefile

@@ -16,7 +16,8 @@ APPS =	aes/aescrypt2	aes/crypt_and_hash	\
 	pkey/rsa_sign		pkey/rsa_verify		\
 	pkey/rsa_sign_pss	pkey/rsa_verify_pss \
 	ssl/ssl_client1		ssl/ssl_client2		\
-	ssl/ssl_server		random/gen_random	\
+	ssl/ssl_server		ssl/ssl_fork_server	\
+	random/gen_random						\
 	test/ssl_cert_test	test/benchmark		\
 	test/selftest		test/ssl_test		\
 	x509/cert_app		x509/crl_app
@@ -105,6 +106,10 @@ ssl/ssl_server: ssl/ssl_server.c ../library/libpolarssl.a
 	echo   "  CC    ssl/ssl_server.c"
 	$(CC) $(CFLAGS) $(OFLAGS) ssl/ssl_server.c   $(LDFLAGS) -o $@
 
+ssl/ssl_fork_server: ssl/ssl_fork_server.c ../library/libpolarssl.a
+	echo   "  CC    ssl/ssl_fork_server.c"
+	$(CC) $(CFLAGS) $(OFLAGS) ssl/ssl_fork_server.c   $(LDFLAGS) -o $@
+
 test/ssl_cert_test: test/ssl_cert_test.c ../library/libpolarssl.a
 	echo   "  CC    test/ssl_cert_test.c"
 	$(CC) $(CFLAGS) $(OFLAGS) test/ssl_cert_test.c   $(LDFLAGS) -o $@

programs/ssl/CMakeLists.txt

@@ -15,6 +15,9 @@ target_link_libraries(ssl_client2 ${libs})
 add_executable(ssl_server ssl_server.c)
 target_link_libraries(ssl_server ${libs})
 
-INSTALL(TARGETS ssl_client1 ssl_client2 ssl_server
+add_executable(ssl_fork_server ssl_fork_server.c)
+target_link_libraries(ssl_fork_server ${libs})
+
+INSTALL(TARGETS ssl_client1 ssl_client2 ssl_server ssl_fork_server
         DESTINATION "bin"
         PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)

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 );
+}