Added version of the SSL pthread server example

ChangeLog

@@ -9,6 +9,7 @@ Features
    * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites
    * Support for IPv6 in the NET module
    * AES-NI support for AES, AES-GCM and AES key scheduling
+   * SSL Pthread-based server example added (ssl_pthread_server)
 
 Changes
    * gen_prime() speedup

programs/Makefile

@@ -49,6 +49,10 @@ ifdef OPENSSL
 APPS +=	test/o_p_test
 endif
 
+ifdef PTHREAD
+APPS +=	ssl/ssl_pthread_server
+endif
+
 .SILENT:
 
 all: $(APPS)
@@ -189,6 +193,10 @@ 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 $@
 
+ssl/ssl_pthread_server: ssl/ssl_pthread_server.c ../library/libpolarssl.a
+	echo   "  CC    ssl/ssl_pthread_server.c"
+	$(CC) $(CFLAGS) $(OFLAGS) ssl/ssl_pthread_server.c   $(LDFLAGS) -o $@ -lpthread
+
 ssl/ssl_mail_client: ssl/ssl_mail_client.c ../library/libpolarssl.a
 	echo   "  CC    ssl/ssl_mail_client.c"
 	$(CC) $(CFLAGS) $(OFLAGS) ssl/ssl_mail_client.c   $(LDFLAGS) -o $@

programs/ssl/CMakeLists.txt

@@ -1,7 +1,17 @@
+find_package(Threads)
+
 set(libs
      polarssl
 )
 
+set(targets
+     ssl_client1
+     ssl_client2
+     ssl_server
+     ssl_fork_server
+     ssl_mail_client
+)
+
 if(USE_PKCS11_HELPER_LIBRARY)
     set(libs ${libs} pkcs11-helper)
 endif(USE_PKCS11_HELPER_LIBRARY)
@@ -28,6 +38,12 @@ target_link_libraries(ssl_fork_server ${libs})
 add_executable(ssl_mail_client ssl_mail_client.c)
 target_link_libraries(ssl_mail_client ${libs})
 
-install(TARGETS ssl_client1 ssl_client2 ssl_server ssl_fork_server ssl_mail_client
+if(THREADS_FOUND)
+    add_executable(ssl_pthread_server ssl_pthread_server.c)
+    target_link_libraries(ssl_pthread_server ${libs} pthread)
+    set(targets ${targets} ssl_pthread_server)
+endif(THREADS_FOUND)
+
+install(TARGETS ${targets}
         DESTINATION "bin"
         PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)

programs/ssl/ssl_pthread_server.c

@@ -0,0 +1,491 @@
+/*
+ *  SSL server demonstration program using pthread for handling multiple
+ *  clients.
+ *
+ *  Copyright (C) 2006-2013, 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.
+ */
+
+#include "polarssl/config.h"
+
+#if defined(_WIN32)
+#include <windows.h>
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.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"
+
+#if defined(POLARSSL_SSL_CACHE_C)
+#include "polarssl/ssl_cache.h"
+#endif
+
+#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C)
+#include "polarssl/memory.h"
+#endif
+
+#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) ||            \
+    !defined(POLARSSL_X509_CRT_PARSE_C) ||                                  \
+    !defined(POLARSSL_THREADING_C) || !defined(POLARSSL_THREADING_PTHREAD)
+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 and/or POLARSSL_X509_CRT_PARSE_C and/or "
+           "POLARSSL_THREADING_C and/or POLARSSL_THREADING_PTHREAD "
+           "not defined.\n");
+    return( 0 );
+}
+#else
+
+#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"
+
+#define DEBUG_LEVEL 0
+
+threading_mutex_t debug_mutex;
+
+static void my_mutexed_debug( void *ctx, int level, const char *str )
+{
+    polarssl_mutex_lock( &debug_mutex );
+    if( level < DEBUG_LEVEL )
+    {
+        fprintf( (FILE *) ctx, "%s", str );
+        fflush(  (FILE *) ctx  );
+    }
+    polarssl_mutex_unlock( &debug_mutex );
+}
+
+typedef struct {
+    int client_fd;
+    int thread_complete;
+    entropy_context *entropy;
+#if defined(POLARSSL_SSL_CACHE_C)
+    ssl_cache_context *cache;
+#endif
+    x509_crt *ca_chain;
+    x509_crt *server_cert;
+    pk_context *server_key;
+} thread_info_t;
+
+typedef struct {
+    int active;
+    thread_info_t   data;
+    pthread_t       thread;
+} pthread_info_t;
+
+#define MAX_NUM_THREADS 5
+
+static thread_info_t    base_info;
+static pthread_info_t   threads[MAX_NUM_THREADS];
+
+static void *handle_ssl_connection( void *data )
+{
+    int ret, len;
+    thread_info_t *thread_info = (thread_info_t *) data;
+    int client_fd = thread_info->client_fd;
+    int thread_id = (int) pthread_self();
+    unsigned char buf[1024];
+    char pers[50];
+    ssl_context ssl;
+    ctr_drbg_context ctr_drbg;
+
+    snprintf( pers, sizeof(pers), "SSL Pthread Thread %d", thread_id );
+    printf( "  [ #%d ]  Client FD %d\n", thread_id, client_fd );
+    printf( "  [ #%d ]  Seeding the random number generator...\n", thread_id );
+
+    /* entropy_func() is thread-safe if POLARSSL_THREADING_C is set
+     */
+    if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, thread_info->entropy,
+                               (const unsigned char *) pers,
+                               strlen( pers ) ) ) != 0 )
+    {
+        printf( "  [ #%d ]  failed: ctr_drbg_init returned -0x%04x\n",
+                thread_id, -ret );
+        goto thread_exit;
+    }
+
+    printf( "  [ #%d ]  ok\n", thread_id );
+
+    /*
+     * 4. Setup stuff
+     */
+    printf( "  [ #%d ]  Setting up the SSL data....\n", thread_id );
+
+    if( ( ret = ssl_init( &ssl ) ) != 0 )
+    {
+        printf( "  [ #%d ]  failed: ssl_init returned -0x%04x\n",
+                thread_id, -ret );
+        goto thread_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_mutexed_debug, stdout );
+
+    /* ssl_cache_get() and ssl_cache_set() are thread-safe if
+     * POLARSSL_THREADING_C is set.
+     */
+#if defined(POLARSSL_SSL_CACHE_C)
+    ssl_set_session_cache( &ssl, ssl_cache_get, thread_info->cache,
+                                 ssl_cache_set, thread_info->cache );
+#endif
+
+    ssl_set_ca_chain( &ssl, thread_info->ca_chain, NULL, NULL );
+    ssl_set_own_cert( &ssl, thread_info->server_cert, thread_info->server_key );
+
+    printf( "  [ #%d ]  ok\n", thread_id );
+
+    ssl_set_bio( &ssl, net_recv, &client_fd,
+                       net_send, &client_fd );
+
+    printf( "  [ #%d ]  ok\n", thread_id );
+
+    /*
+     * 5. Handshake
+     */
+    printf( "  [ #%d ]  Performing the SSL/TLS handshake\n", thread_id );
+
+    while( ( ret = ssl_handshake( &ssl ) ) != 0 )
+    {
+        if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
+        {
+            printf( "  [ #%d ]  failed: ssl_handshake returned -0x%04x\n",
+                    thread_id, -ret );
+            goto thread_exit;
+        }
+    }
+
+    printf( "  [ #%d ]  ok\n", thread_id );
+
+    /*
+     * 6. Read the HTTP Request
+     */
+    printf( "  [ #%d ]  < Read from client\n", thread_id );
+
+    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( "  [ #%d ]  connection was closed gracefully\n",
+                            thread_id );
+                    goto thread_exit;
+
+                case POLARSSL_ERR_NET_CONN_RESET:
+                    printf( "  [ #%d ]  connection was reset by peer\n",
+                            thread_id );
+                    goto thread_exit;
+
+                default:
+                    printf( "  [ #%d ]  ssl_read returned -0x%04x\n",
+                            thread_id, -ret );
+                    goto thread_exit;
+            }
+
+            break;
+        }
+
+        len = ret;
+        printf( "  [ #%d ]  %d bytes read\n=====\n%s\n=====\n",
+                thread_id, len, (char *) buf );
+
+        if( ret > 0 )
+            break;
+    }
+    while( 1 );
+
+    /*
+     * 7. Write the 200 Response
+     */
+    printf( "  [ #%d ]  > Write to client:\n", thread_id );
+
+    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( "  [ #%d ]  failed: peer closed the connection\n",
+                    thread_id );
+            goto thread_exit;
+        }
+
+        if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
+        {
+            printf( "  [ #%d ]  failed: ssl_write returned -0x%04x\n",
+                    thread_id, ret );
+            goto thread_exit;
+        }
+    }
+
+    len = ret;
+    printf( "  [ #%d ]  %d bytes written\n=====\n%s\n=====\n",
+            thread_id, len, (char *) buf );
+
+    ret = 0;
+
+thread_exit:
+
+#ifdef POLARSSL_ERROR_C
+    if( ret != 0 )
+    {
+        char error_buf[100];
+        polarssl_strerror( ret, error_buf, 100 );
+        printf("  [ #%d ]  Last error was: -0x%04x - %s\n\n",
+               thread_id, -ret, error_buf );
+    }
+#endif
+
+    net_close( client_fd );
+    ssl_free( &ssl );
+
+    thread_info->thread_complete = 1;
+
+    return( NULL );
+}
+
+static int thread_create( int client_fd )
+{
+    int ret, i;
+
+    /*
+     * Find in-active or finished thread slot
+     */
+    for( i = 0; i < MAX_NUM_THREADS; i++ )
+    {
+        if( threads[i].active == 0 )
+            break;
+
+        if( threads[i].data.thread_complete == 1 )
+        {
+            printf( "  [ main ]  Cleaning up thread %d\n", i );
+            pthread_join(threads[i].thread, NULL );
+            memset( &threads[i], 0, sizeof(pthread_info_t) );
+            break;
+        }
+    }
+
+    if( i == MAX_NUM_THREADS )
+        return( -1 );
+
+    /*
+     * Fill thread-info for thread
+     */
+    memcpy( &threads[i].data, &base_info, sizeof(base_info) );
+    threads[i].active = 1;
+    threads[i].data.client_fd = client_fd;
+
+    if( ( ret = pthread_create( &threads[i].thread, NULL, handle_ssl_connection,                                &threads[i].data ) ) != 0 )
+    {
+        return( ret );
+    }
+
+    return( 0 );
+}
+
+int main( int argc, char *argv[] )
+{
+    int ret;
+    int listen_fd;
+    int client_fd = -1;
+
+    entropy_context entropy;
+    x509_crt srvcert;
+    pk_context pkey;
+#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C)
+    unsigned char alloc_buf[100000];
+#endif
+#if defined(POLARSSL_SSL_CACHE_C)
+    ssl_cache_context cache;
+#endif
+
+    ((void) argc);
+    ((void) argv);
+
+#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C)
+    memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
+#endif
+
+#if defined(POLARSSL_SSL_CACHE_C)
+    ssl_cache_init( &cache );
+    base_info.cache = &cache;
+#endif
+
+    memset( threads, 0, sizeof(threads) );
+
+    polarssl_mutex_init( &debug_mutex );
+
+    /*
+     * We use only a single entropy source that is used in all the threads.
+     */
+    entropy_init( &entropy );
+    base_info.entropy = &entropy;
+
+    /*
+     * 1. Load the certificates and private RSA key
+     */
+    printf( "\n  . Loading the server cert. and key..." );
+    fflush( stdout );
+
+    x509_crt_init( &srvcert );
+
+    /*
+     * This demonstration program uses embedded test certificates.
+     * Instead, you may want to use x509_crt_parse_file() to read the
+     * server and CA certificates, as well as pk_parse_keyfile().
+     */
+    ret = x509_crt_parse( &srvcert, (const unsigned char *) test_srv_crt,
+                          strlen( test_srv_crt ) );
+    if( ret != 0 )
+    {
+        printf( " failed\n  !  x509_crt_parse returned %d\n\n", ret );
+        goto exit;
+    }
+
+    ret = x509_crt_parse( &srvcert, (const unsigned char *) test_ca_list,
+                          strlen( test_ca_list ) );
+    if( ret != 0 )
+    {
+        printf( " failed\n  !  x509_crt_parse returned %d\n\n", ret );
+        goto exit;
+    }
+
+    pk_init( &pkey );
+    ret =  pk_parse_key( &pkey, (const unsigned char *) test_srv_key,
+                         strlen( test_srv_key ), NULL, 0 );
+    if( ret != 0 )
+    {
+        printf( " failed\n  !  pk_parse_key returned %d\n\n", ret );
+        goto exit;
+    }
+
+    base_info.ca_chain = srvcert.next;
+    base_info.server_cert = &srvcert;
+    base_info.server_key = &pkey;
+
+    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" );
+
+reset:
+#ifdef POLARSSL_ERROR_C
+    if( ret != 0 )
+    {
+        char error_buf[100];
+        polarssl_strerror( ret, error_buf, 100 );
+        printf( "  [ main ]  Last error was: -0x%04x - %s\n", -ret, error_buf );
+    }
+#endif
+
+    /*
+     * 3. Wait until a client connects
+     */
+    client_fd = -1;
+
+    printf( "  [ main ]  Waiting for a remote connection\n" );
+
+    if( ( ret = net_accept( listen_fd, &client_fd, NULL ) ) != 0 )
+    {
+        printf( "  [ main ] failed: net_accept returned -0x%04x\n", ret );
+        goto exit;
+    }
+
+    printf( "  [ main ]  ok\n" );
+    printf( "  [ main ]  Creating a new thread\n" );
+
+    if( ( ret = thread_create( client_fd ) ) != 0 )
+    {
+        printf( "  [ main ]  failed: thread_create returned %d\n", ret );
+        net_close( client_fd );
+        goto reset;
+    }
+
+    ret = 0;
+    goto reset;
+
+exit:
+    x509_crt_free( &srvcert );
+    pk_free( &pkey );
+#if defined(POLARSSL_SSL_CACHE_C)
+    ssl_cache_free( &cache );
+#endif
+    entropy_free( &entropy );
+
+    polarssl_mutex_free( &debug_mutex );
+
+#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C)
+    memory_buffer_alloc_free();
+#endif
+
+#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 && POLARSSL_THREADING_C &&
+          POLARSSL_THREADING_PTHREAD */