Add dlts_client.c and dtls_server.c
diff --git a/programs/ssl/dtls_server.c b/programs/ssl/dtls_server.c
new file mode 100644
index 0000000..2f1f2c4
--- /dev/null
+++ b/programs/ssl/dtls_server.c
@@ -0,0 +1,410 @@
+/*
+ * Simple DTLS server demonstration program
+ *
+ * Copyright (C) 2014, 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.
+ */
+
+#if !defined(POLARSSL_CONFIG_FILE)
+#include "polarssl/config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
+
+#if !defined(POLARSSL_SSL_SRV_C) || !defined(POLARSSL_SSL_PROTO_DTLS) || \
+ !defined(POLARSSL_SSL_COOKIE_C) || !defined(POLARSSL_NET_C) || \
+ !defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C) || \
+ !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_RSA_C) || \
+ !defined(POLARSSL_CERTS_C)
+
+#include <stdio.h>
+int main( void )
+{
+ printf( "POLARSSL_SSL_SRV_C and/or POLARSSL_SSL_PROTO_DTLS and/or "
+ "POLARSSL_SSL_COOKIE_C and/or POLARSSL_NET_C and/or "
+ "POLARSSL_ENTROPY_C and/or POLARSSL_CTR_DRBG_C and/or "
+ "POLARSSL_X509_CRT_PARSE_C and/or POLARSSL_RSA_C and/or "
+ "POLARSSL_CERTS_C not defined.\n" );
+ return( 0 );
+}
+#else
+
+#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/ssl_cookie.h"
+#include "polarssl/net.h"
+#include "polarssl/error.h"
+#include "polarssl/debug.h"
+
+#if defined(POLARSSL_SSL_CACHE_C)
+#include "polarssl/ssl_cache.h"
+#endif
+
+#define READ_TIMEOUT_MS 10000 /* 5 seconds */
+#define DEBUG_LEVEL 0
+
+static void my_debug( void *ctx, int level, const char *str )
+{
+ ((void) level);
+
+ fprintf( (FILE *) ctx, "%s", str );
+ fflush( (FILE *) ctx );
+}
+
+int main( void )
+{
+ int ret, len;
+ int listen_fd;
+ int client_fd = -1;
+ unsigned char buf[1024];
+ const char *pers = "dtls_server";
+ unsigned char client_ip[16] = { 0 };
+ ssl_cookie_ctx cookie_ctx;
+
+ entropy_context entropy;
+ ctr_drbg_context ctr_drbg;
+ ssl_context ssl;
+ x509_crt srvcert;
+ pk_context pkey;
+#if defined(POLARSSL_SSL_CACHE_C)
+ ssl_cache_context cache;
+#endif
+
+ memset( &ssl, 0, sizeof(ssl_context) );
+ ssl_cookie_init( &cookie_ctx );
+#if defined(POLARSSL_SSL_CACHE_C)
+ ssl_cache_init( &cache );
+#endif
+ x509_crt_init( &srvcert );
+ pk_init( &pkey );
+ entropy_init( &entropy );
+
+#if defined(POLARSSL_DEBUG_C)
+ debug_set_threshold( DEBUG_LEVEL );
+#endif
+
+ /*
+ * 1. Load the certificates and private RSA key
+ */
+ printf( "\n . Loading the server cert. and key..." );
+ fflush( stdout );
+
+ /*
+ * 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;
+ }
+
+ 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;
+ }
+
+ printf( " ok\n" );
+
+ /*
+ * 2. Setup the "listening" UDP socket
+ */
+ printf( " . Bind on udp/*/4433 ..." );
+ fflush( stdout );
+
+ if( ( ret = net_bind( &listen_fd, NULL, 4433, NET_PROTO_UDP ) ) != 0 )
+ {
+ printf( " failed\n ! net_bind returned %d\n\n", ret );
+ goto exit;
+ }
+
+ printf( " ok\n" );
+
+ /*
+ * 3. Seed the RNG
+ */
+ printf( " . Seeding the random number generator..." );
+ fflush( stdout );
+
+ if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
+ (const unsigned char *) pers,
+ strlen( pers ) ) ) != 0 )
+ {
+ printf( " failed\n ! ctr_drbg_init returned %d\n", ret );
+ goto exit;
+ }
+
+ printf( " ok\n" );
+
+ /*
+ * 4. Setup stuff
+ */
+ printf( " . Setting up the DTLS data..." );
+ fflush( stdout );
+
+ if( ( ret = ssl_init( &ssl ) ) != 0 )
+ {
+ printf( " failed\n ! ssl_init returned %d\n\n", ret );
+ goto exit;
+ }
+
+ ssl_set_endpoint( &ssl, SSL_IS_SERVER );
+ ssl_set_transport( &ssl, SSL_TRANSPORT_DATAGRAM );
+ ssl_set_authmode( &ssl, SSL_VERIFY_NONE );
+
+ ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
+ ssl_set_dbg( &ssl, my_debug, stdout );
+
+#if defined(POLARSSL_SSL_CACHE_C)
+ ssl_set_session_cache( &ssl, ssl_cache_get, &cache,
+ ssl_cache_set, &cache );
+#endif
+
+ ssl_set_ca_chain( &ssl, srvcert.next, NULL, NULL );
+ if( ( ret = ssl_set_own_cert( &ssl, &srvcert, &pkey ) ) != 0 )
+ {
+ printf( " failed\n ! ssl_set_own_cert returned %d\n\n", ret );
+ goto exit;
+ }
+
+ if( ( ret = ssl_cookie_setup( &cookie_ctx,
+ ctr_drbg_random, &ctr_drbg ) ) != 0 )
+ {
+ printf( " failed\n ! ssl_cookie_setup returned %d\n\n", ret );
+ goto exit;
+ }
+
+ ssl_set_dtls_cookies( &ssl, ssl_cookie_write, ssl_cookie_check,
+ &cookie_ctx );
+
+ printf( " ok\n" );
+
+reset:
+#ifdef POLARSSL_ERROR_C
+ if( ret != 0 )
+ {
+ char error_buf[100];
+ polarssl_strerror( ret, error_buf, 100 );
+ printf("Last error was: %d - %s\n\n", ret, error_buf );
+ }
+#endif
+
+ if( client_fd != -1 )
+ net_close( client_fd );
+
+ ssl_session_reset( &ssl );
+
+ /*
+ * 3. Wait until a client connects
+ */
+ client_fd = -1;
+
+ printf( " . Waiting for a remote connection ..." );
+ fflush( stdout );
+
+ if( ( ret = net_accept( listen_fd, &client_fd, client_ip ) ) != 0 )
+ {
+ printf( " failed\n ! net_accept returned %d\n\n", ret );
+ goto exit;
+ }
+
+ /* With UDP, bind_fd is hijacked by client_fd, so bind a new one */
+ if( ( ret = net_bind( &listen_fd, NULL, 4433, NET_PROTO_UDP ) ) != 0 )
+ {
+ printf( " failed\n ! net_bind returned -0x%x\n\n", -ret );
+ goto exit;
+ }
+
+ /* For HelloVerifyRequest cookies */
+ if( ( ret = ssl_set_client_transport_id( &ssl, client_ip,
+ sizeof( client_ip ) ) ) != 0 )
+ {
+ printf( " failed\n ! "
+ "ssl_set_client_tranport_id() returned -0x%x\n\n", -ret );
+ goto exit;
+ }
+
+ ssl_set_bio_timeout( &ssl, &client_fd,
+ net_send, net_recv, net_recv_timeout,
+ READ_TIMEOUT_MS );
+
+ printf( " ok\n" );
+
+ /*
+ * 5. Handshake
+ */
+ printf( " . Performing the DTLS handshake..." );
+ fflush( stdout );
+
+ do ret = ssl_handshake( &ssl );
+ while( ret == POLARSSL_ERR_NET_WANT_READ ||
+ ret == POLARSSL_ERR_NET_WANT_WRITE );
+
+ if( ret == POLARSSL_ERR_SSL_HELLO_VERIFY_REQUIRED )
+ {
+ printf( " hello verification requested\n" );
+ ret = 0;
+ goto reset;
+ }
+ else if( ret != 0 )
+ {
+ printf( " failed\n ! ssl_handshake returned -0x%x\n\n", -ret );
+ goto reset;
+ }
+
+ printf( " ok\n" );
+
+ /*
+ * 6. Read the echo Request
+ */
+ printf( " < Read from client:" );
+ fflush( stdout );
+
+ len = sizeof( buf ) - 1;
+ memset( buf, 0, sizeof( buf ) );
+
+ do ret = ssl_read( &ssl, buf, len );
+ while( ret == POLARSSL_ERR_NET_WANT_READ ||
+ ret == POLARSSL_ERR_NET_WANT_WRITE );
+
+ if( ret <= 0 )
+ {
+ switch( ret )
+ {
+ case POLARSSL_ERR_NET_TIMEOUT:
+ printf( " timeout\n\n" );
+ goto reset;
+
+ case POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY:
+ printf( " connection was closed gracefully\n" );
+ ret = 0;
+ goto close_notify;
+
+ default:
+ printf( " ssl_read returned -0x%x\n\n", -ret );
+ goto reset;
+ }
+ }
+
+ len = ret;
+ printf( " %d bytes read\n\n%s\n\n", len, buf );
+
+ /*
+ * 7. Write the 200 Response
+ */
+ printf( " > Write to client:" );
+ fflush( stdout );
+
+ do ret = ssl_write( &ssl, buf, len );
+ while( ret == POLARSSL_ERR_NET_WANT_READ ||
+ ret == POLARSSL_ERR_NET_WANT_WRITE );
+
+ if( ret < 0 )
+ {
+ printf( " failed\n ! ssl_write returned %d\n\n", ret );
+ goto exit;
+ }
+
+ len = ret;
+ printf( " %d bytes written\n\n%s\n\n", len, buf );
+
+ /*
+ * 8. Done, cleanly close the connection
+ */
+close_notify:
+ printf( " . Closing the connection..." );
+
+ /* No error checking, the connection might be closed already */
+ do ret = ssl_close_notify( &ssl );
+ while( ret == POLARSSL_ERR_NET_WANT_WRITE );
+ ret = 0;
+
+ printf( " done\n" );
+
+ goto reset;
+
+ /*
+ * Final clean-ups and exit
+ */
+exit:
+
+#ifdef POLARSSL_ERROR_C
+ if( ret != 0 )
+ {
+ char error_buf[100];
+ polarssl_strerror( ret, error_buf, 100 );
+ printf( "Last error was: %d - %s\n\n", ret, error_buf );
+ }
+#endif
+
+ if( client_fd != -1 )
+ net_close( client_fd );
+
+ x509_crt_free( &srvcert );
+ pk_free( &pkey );
+ ssl_free( &ssl );
+ ssl_cookie_free( &cookie_ctx );
+#if defined(POLARSSL_SSL_CACHE_C)
+ ssl_cache_free( &cache );
+#endif
+ ctr_drbg_free( &ctr_drbg );
+ entropy_free( &entropy );
+
+#if defined(_WIN32)
+ printf( " Press Enter to exit this program.\n" );
+ fflush( stdout ); getchar();
+#endif
+
+ /* Shell can not handle large exit numbers -> 1 for errors */
+ if( ret < 0 )
+ ret = 1;
+
+ return( ret );
+}
+#endif /* POLARSSL_SSL_SRV_C && POLARSSL_SSL_PROTO_DTLS &&
+ POLARSSL_SSL_COOKIE_C && POLARSSL_NET_C && POLARSSL_ENTROPY_C &&
+ POLARSSL_CTR_DRBG_C && POLARSSL_X509_CRT_PARSE_C && POLARSSL_RSA_C
+ && POLARSSL_CERTS_C */