int main( int argc, const char *argv[] ) { /* Client and server declarations. */ int ret; int len; #if SOCKET_COMMUNICATION int listen_fd = -1; int client_fd = -1; int server_fd = -1; #endif unsigned char buf[1024]; /* Handshake step counter */ size_t step = 1; int flags; ssl_context s_ssl, c_ssl; x509_crt srvcert; pk_context pkey; #if defined(POLARSSL_SSL_CACHE_C) ssl_cache_context cache; #endif if( argc == 3) { packet_in_num = atoi(argv[1]); packet_in_file = argv[2]; } else if( argc != 1) { usage(argv[0]); exit(1); } /* Server init */ memset( &s_ssl, 0, sizeof( ssl_context ) ); #if defined(POLARSSL_SSL_CACHE_C) ssl_cache_init( &cache ); #endif x509_crt_init( &srvcert ); pk_init( &pkey ); /* Client init */ memset( &c_ssl, 0, sizeof( ssl_context ) ); /*x509_crt_init( &cacert );*/ #if defined(POLARSSL_DEBUG_C) debug_set_threshold( DEBUG_LEVEL ); #endif /* * Server: * Load the certificates and private RSA key */ if( packet_in_num == 0 ) { printf( " . 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 ) { polarssl_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; } if( packet_in_num == 0 ) { printf( " ok\n" ); } /* * Server: * Setup stuff */ if( packet_in_num == 0 ) { printf( " . Server: Setting up the SSL data...." ); fflush( stdout ); } if( ( ret = ssl_init( &s_ssl ) ) != 0 ) { polarssl_printf( " failed\n ! ssl_init returned %d\n\n", ret ); goto exit; } ssl_set_endpoint( &s_ssl, SSL_IS_SERVER ); ssl_set_authmode( &s_ssl, SSL_VERIFY_NONE ); /* SSLv3 is deprecated, set minimum to TLS 1.0 */ ssl_set_min_version( &s_ssl, SSL_MAJOR_VERSION_3, SSL_MINOR_VERSION_1 ); /* RC4 is deprecated, disable it */ ssl_set_arc4_support( &s_ssl, SSL_ARC4_DISABLED ); ssl_set_rng( &s_ssl, ctr_drbg_deterministic, NULL ); ssl_set_dbg( &s_ssl, my_debug, stdout ); #if defined(POLARSSL_SSL_CACHE_C) ssl_set_session_cache( &s_ssl, ssl_cache_get, &cache, ssl_cache_set, &cache ); #endif ssl_set_ca_chain( &s_ssl, srvcert.next, NULL, NULL ); if( ( ret = ssl_set_own_cert( &s_ssl, &srvcert, &pkey ) ) != 0 ) { printf( " failed\n ! ssl_set_own_cert returned %d\n\n", ret ); goto exit; } if( packet_in_num == 0 ) { printf( " ok\n" ); } ssl_session_reset( &s_ssl ); #if SOCKET_COMMUNICATION /* * Server: * Setup the listening TCP socket */ if( packet_in_num == 0 ) { printf( " . Bind on https://localhost:%d/ ...", SERVER_PORT ); fflush( stdout ); } if( ( ret = net_bind( &listen_fd, NULL, SERVER_PORT ) ) != 0 ) { printf( " failed\n ! net_bind returned %d\n\n", ret ); goto exit; } if( packet_in_num == 0 ) { printf( " ok\n" ); } /* * Client: * Start the connection */ if( packet_in_num == 0 ) { printf( " . Connecting to tcp/%s/%d...", SERVER_NAME, SERVER_PORT ); fflush( stdout ); } if( ( ret = net_connect( &server_fd, SERVER_NAME, SERVER_PORT ) ) != 0 ) { printf( " failed\n ! net_connect returned %d\n\n", ret ); goto exit; } if( packet_in_num == 0 ) { printf( " ok\n" ); } /* * Server: * Start listening for client connections */ if( packet_in_num == 0 ) { printf( " . Waiting for a remote connection ..." ); fflush( stdout ); } /* * Server: * Accept client connection (socket is set non-blocking in * library/net.c) */ if( ( ret = net_accept( listen_fd, &client_fd, NULL ) ) != 0 ) { printf( " failed\n ! net_accept returned %d\n\n", ret ); goto exit; } if( packet_in_num == 0 ) { printf( " ok\n" ); } ssl_set_bio( &s_ssl, recv_custom, &client_fd, send_custom, &client_fd ); #else ssl_set_bio( &s_ssl, func_server_recv_buf, NULL, func_server_send_buf, NULL ); #endif /* * Client: * Setup stuff */ if( packet_in_num == 0 ) { printf( " . Client: Setting up the SSL/TLS structure..." ); fflush( stdout ); } if( ( ret = ssl_init( &c_ssl ) ) != 0 ) { polarssl_printf( " failed\n ! ssl_init returned %d\n\n", ret ); goto exit; } if( packet_in_num == 0 ) { polarssl_printf( " ok\n" ); } ssl_set_endpoint( &c_ssl, SSL_IS_CLIENT ); /* OPTIONAL is not optimal for security, * but makes interop easier in this simplified example */ ssl_set_authmode( &c_ssl, SSL_VERIFY_OPTIONAL ); /* NONE permits man-in-the-middle attacks. */ /*ssl_set_authmode( &c_ssl, VERIFY_NONE );*/ /*ssl_set_authmode( &c_ssl, SSL_VERIFY_REQUIRED );*/ ssl_set_ca_chain( &c_ssl, &srvcert, NULL, "PolarSSL Server 1" ); /* SSLv3 is deprecated, set minimum to TLS 1.0 */ ssl_set_min_version( &c_ssl, SSL_MAJOR_VERSION_3, SSL_MINOR_VERSION_1 ); /* RC4 is deprecated, disable it */ ssl_set_arc4_support( &c_ssl, SSL_ARC4_DISABLED ); ssl_set_rng( &c_ssl, ctr_drbg_deterministic, NULL ); ssl_set_dbg( &c_ssl, my_debug, stdout ); if( ( ret = ssl_set_hostname( &c_ssl, "mbed TLS Server 1" ) ) != 0 ) { printf( " failed\n ! ssl_set_hostname returned %d\n\n", ret ); goto exit; } #if SOCKET_COMMUNICATION ssl_set_bio( &c_ssl, recv_custom, &server_fd, send_custom, &server_fd ); #else ssl_set_bio( &c_ssl, func_client_recv_buf, NULL, func_client_send_buf, NULL ); #endif if( packet_in_num == 0 ) { printf( " . Performing the SSL/TLS handshake...\n" ); fflush( stdout ); } /* * The following number of steps are hardcoded to ensure * that the client and server complete the handshake without * waiting infinitely for the other side to send data. * * 1 2 3 4 5 6 7 8 9 */ int client_steps[] = { 2, 1, 1, 1, 4, 2, 1, 1, 3 }; int server_steps[] = { 3, 1, 1, 3, 2, 1, 2, 1, 2 }; do { /* * Client: * Handshake step */ int i; int no_steps; if( c_ssl.state == SSL_HANDSHAKE_OVER ) { no_steps = 0; } else { no_steps = client_steps[step - 1]; } for (i = 0; i < no_steps; i++) { if( ( ret = ssl_handshake_step( &c_ssl ) ) != 0 ) { if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE ) { printf( " failed\n ! ssl_handshake returned -0x%x\n\n", -ret ); goto exit; } } } if( packet_in_num == 0 ) { printf( "--- client handshake step %zd ok\n", step ); } /* * Server: * Handshake step */ if( s_ssl.state == SSL_HANDSHAKE_OVER ) { printf("over\n"); no_steps = 0; } else { no_steps = server_steps[step - 1]; } for (i = 0; i < no_steps; i++) { if( ( ret = ssl_handshake_step( &s_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; } } } if( packet_in_num == 0 ) { printf( "--- server handshake step %zd ok\n", step ); } step++; } while( ((c_ssl.state != SSL_HANDSHAKE_OVER) || (s_ssl.state != SSL_HANDSHAKE_OVER)) && (step <= MAX_HANDSHAKE_STEPS) ); if( packet_in_num == 0 ) { printf( "c_ssl.state: %d\n", c_ssl.state != SSL_HANDSHAKE_OVER ); printf( "s_ssl.state: %d\n", s_ssl.state != SSL_HANDSHAKE_OVER ); } /* * Client: * Verify the server certificate */ if( packet_in_num == 0 ) { printf( " . Verifying peer X.509 certificate..." ); } /* In real life, we probably want to bail out when ret != 0 */ if( ( flags = ssl_get_verify_result( &c_ssl ) ) != 0 ) { char vrfy_buf[512]; printf( " failed\n" ); x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags ); printf( "%s\n", vrfy_buf ); } else if( packet_in_num == 0 ) { printf( " ok\n" ); } /* * Client: * Write the GET request */ if( packet_in_num == 0 ) { printf( " > Write to server:" ); fflush( stdout ); } len = sprintf( (char *) buf, GET_REQUEST ); while( ( ret = ssl_write( &c_ssl, buf, len ) ) <= 0 ) { 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; if( packet_in_num == 0 ) { printf( " %d bytes written\n\n%s", len, (char *) buf ); } /* * Server: * Read the HTTP Request */ if( packet_in_num == 0 ) { printf( " < Read from client:" ); fflush( stdout ); } do { len = sizeof( buf ) - 1; memset( buf, 0, sizeof( buf ) ); ret = ssl_read( &s_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 -0x%x\n", -ret ); break; } break; } len = ret; if( packet_in_num == 0 ) { printf( " %d bytes read\n\n%s", len, (char *) buf ); } if( ret > 0 ) break; } while( 1 ); /* * Server: * Write the 200 Response */ if( packet_in_num == 0 ) { printf( " > Write to client:" ); fflush( stdout ); } len = sprintf( (char *) buf, HTTP_RESPONSE, ssl_get_ciphersuite( &s_ssl ) ); while( ( ret = ssl_write( &s_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; if( packet_in_num == 0 ) { printf( " %d bytes written\n\n%s\n", len, (char *) buf ); } /* * Client: * Read the HTTP response */ if( packet_in_num == 0 ) { printf( " < Read from server:" ); fflush( stdout ); } do { len = sizeof( buf ) - 1; memset( buf, 0, sizeof( buf ) ); ret = ssl_read( &c_ssl, buf, len ); if( ret == POLARSSL_ERR_NET_WANT_READ || ret == POLARSSL_ERR_NET_WANT_WRITE ) continue; if( ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY ) { ret = 0; break; } if( ret < 0 ) { printf( "failed\n ! ssl_read returned %d\n\n", ret ); break; } if( ret == 0 ) { printf( "\n\nEOF\n\n" ); break; } len = ret; if( packet_in_num == 0 ) { printf( " %d bytes read\n\n%s", len, (char *) buf ); } /* * Server: * Client read response. Close connection. */ if ( packet_in_num == 0 ) { printf( " . Closing the connection..." ); fflush( stdout ); } while( ( ret = ssl_close_notify( &s_ssl ) ) < 0 ) { if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE ) { printf( " failed\n ! ssl_close_notify returned %d\n\n", ret ); goto exit; } } if( packet_in_num == 0 ) { printf( " ok\n" ); } } while( 1 ); /* * Client: * Close connection. */ if( packet_in_num == 0 ) { printf( " . Closing the connection..." ); fflush( stdout ); } ssl_close_notify( &c_ssl ); if( packet_in_num == 0 ) { printf( " ok\n" ); } /* * Server: * We do not have multiple clients and therefore do not goto reset. */ /*ret = 0;*/ /*goto reset;*/ 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 SOCKET_COMMUNICATION if ( client_fd != 1 ) net_close( client_fd ); if( server_fd != -1 ) net_close( server_fd ); if ( listen_fd != 1 ) net_close( listen_fd ); #endif x509_crt_free( &srvcert ); pk_free( &pkey ); ssl_free( &s_ssl ); ssl_free( &c_ssl ); #if defined(POLARSSL_SSL_CACHE_C) ssl_cache_free( &cache ); #endif #if defined(_WIN32) printf( " Press Enter to exit this program.\n" ); fflush( stdout ); getchar(); #endif return( ret ); }
int main( int argc, char *argv[] ) { int ret = 0, len, server_fd, i, written, frags; unsigned char buf[SSL_MAX_CONTENT_LEN + 1]; #if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED) unsigned char psk[POLARSSL_PSK_MAX_LEN]; size_t psk_len = 0; #endif #if defined(POLARSSL_SSL_ALPN) const char *alpn_list[10]; #endif const char *pers = "ssl_client2"; entropy_context entropy; ctr_drbg_context ctr_drbg; ssl_context ssl; ssl_session saved_session; #if defined(POLARSSL_X509_CRT_PARSE_C) x509_crt cacert; x509_crt clicert; pk_context pkey; #endif char *p, *q; const int *list; /* * Make sure memory references are valid. */ server_fd = 0; memset( &ssl, 0, sizeof( ssl_context ) ); memset( &saved_session, 0, sizeof( ssl_session ) ); #if defined(POLARSSL_X509_CRT_PARSE_C) x509_crt_init( &cacert ); x509_crt_init( &clicert ); pk_init( &pkey ); #endif #if defined(POLARSSL_SSL_ALPN) memset( (void * ) alpn_list, 0, sizeof( alpn_list ) ); #endif if( argc == 0 ) { usage: if( ret == 0 ) ret = 1; printf( USAGE ); list = ssl_list_ciphersuites(); while( *list ) { printf(" %-42s", ssl_get_ciphersuite_name( *list ) ); list++; if( !*list ) break; printf(" %s\n", ssl_get_ciphersuite_name( *list ) ); list++; } printf("\n"); goto exit; } opt.server_name = DFL_SERVER_NAME; opt.server_addr = DFL_SERVER_ADDR; opt.server_port = DFL_SERVER_PORT; opt.debug_level = DFL_DEBUG_LEVEL; opt.nbio = DFL_NBIO; opt.request_page = DFL_REQUEST_PAGE; opt.request_size = DFL_REQUEST_SIZE; opt.ca_file = DFL_CA_FILE; opt.ca_path = DFL_CA_PATH; opt.crt_file = DFL_CRT_FILE; opt.key_file = DFL_KEY_FILE; opt.psk = DFL_PSK; opt.psk_identity = DFL_PSK_IDENTITY; opt.force_ciphersuite[0]= DFL_FORCE_CIPHER; opt.renegotiation = DFL_RENEGOTIATION; opt.allow_legacy = DFL_ALLOW_LEGACY; opt.renegotiate = DFL_RENEGOTIATE; opt.min_version = DFL_MIN_VERSION; opt.max_version = DFL_MAX_VERSION; opt.auth_mode = DFL_AUTH_MODE; opt.mfl_code = DFL_MFL_CODE; opt.trunc_hmac = DFL_TRUNC_HMAC; opt.reconnect = DFL_RECONNECT; opt.reco_delay = DFL_RECO_DELAY; opt.tickets = DFL_TICKETS; opt.alpn_string = DFL_ALPN_STRING; for( i = 1; i < argc; i++ ) { p = argv[i]; if( ( q = strchr( p, '=' ) ) == NULL ) goto usage; *q++ = '\0'; if( strcmp( p, "server_name" ) == 0 ) opt.server_name = q; else if( strcmp( p, "server_addr" ) == 0 ) opt.server_addr = q; else if( strcmp( p, "server_port" ) == 0 ) { opt.server_port = atoi( q ); if( opt.server_port < 1 || opt.server_port > 65535 ) goto usage; } else if( strcmp( p, "debug_level" ) == 0 ) { opt.debug_level = atoi( q ); if( opt.debug_level < 0 || opt.debug_level > 65535 ) goto usage; } else if( strcmp( p, "nbio" ) == 0 ) { opt.nbio = atoi( q ); if( opt.nbio < 0 || opt.nbio > 2 ) goto usage; } else if( strcmp( p, "request_page" ) == 0 ) opt.request_page = q; else if( strcmp( p, "request_size" ) == 0 ) { opt.request_size = atoi( q ); if( opt.request_size < 0 || opt.request_size > SSL_MAX_CONTENT_LEN ) goto usage; } else if( strcmp( p, "ca_file" ) == 0 ) opt.ca_file = q; else if( strcmp( p, "ca_path" ) == 0 ) opt.ca_path = q; else if( strcmp( p, "crt_file" ) == 0 ) opt.crt_file = q; else if( strcmp( p, "key_file" ) == 0 ) opt.key_file = q; else if( strcmp( p, "psk" ) == 0 ) opt.psk = q; else if( strcmp( p, "psk_identity" ) == 0 ) opt.psk_identity = q; else if( strcmp( p, "force_ciphersuite" ) == 0 ) { opt.force_ciphersuite[0] = ssl_get_ciphersuite_id( q ); if( opt.force_ciphersuite[0] == 0 ) { ret = 2; goto usage; } opt.force_ciphersuite[1] = 0; } else if( strcmp( p, "renegotiation" ) == 0 ) { opt.renegotiation = (atoi( q )) ? SSL_RENEGOTIATION_ENABLED : SSL_RENEGOTIATION_DISABLED; } else if( strcmp( p, "allow_legacy" ) == 0 ) { opt.allow_legacy = atoi( q ); if( opt.allow_legacy < 0 || opt.allow_legacy > 1 ) goto usage; } else if( strcmp( p, "renegotiate" ) == 0 ) { opt.renegotiate = atoi( q ); if( opt.renegotiate < 0 || opt.renegotiate > 1 ) goto usage; } else if( strcmp( p, "reconnect" ) == 0 ) { opt.reconnect = atoi( q ); if( opt.reconnect < 0 || opt.reconnect > 2 ) goto usage; } else if( strcmp( p, "reco_delay" ) == 0 ) { opt.reco_delay = atoi( q ); if( opt.reco_delay < 0 ) goto usage; } else if( strcmp( p, "tickets" ) == 0 ) { opt.tickets = atoi( q ); if( opt.tickets < 0 || opt.tickets > 2 ) goto usage; } else if( strcmp( p, "alpn" ) == 0 ) { opt.alpn_string = q; } else if( strcmp( p, "min_version" ) == 0 ) { if( strcmp( q, "ssl3" ) == 0 ) opt.min_version = SSL_MINOR_VERSION_0; else if( strcmp( q, "tls1" ) == 0 ) opt.min_version = SSL_MINOR_VERSION_1; else if( strcmp( q, "tls1_1" ) == 0 ) opt.min_version = SSL_MINOR_VERSION_2; else if( strcmp( q, "tls1_2" ) == 0 ) opt.min_version = SSL_MINOR_VERSION_3; else goto usage; } else if( strcmp( p, "max_version" ) == 0 ) { if( strcmp( q, "ssl3" ) == 0 ) opt.max_version = SSL_MINOR_VERSION_0; else if( strcmp( q, "tls1" ) == 0 ) opt.max_version = SSL_MINOR_VERSION_1; else if( strcmp( q, "tls1_1" ) == 0 ) opt.max_version = SSL_MINOR_VERSION_2; else if( strcmp( q, "tls1_2" ) == 0 ) opt.max_version = SSL_MINOR_VERSION_3; else goto usage; } else if( strcmp( p, "force_version" ) == 0 ) { if( strcmp( q, "ssl3" ) == 0 ) { opt.min_version = SSL_MINOR_VERSION_0; opt.max_version = SSL_MINOR_VERSION_0; } else if( strcmp( q, "tls1" ) == 0 ) { opt.min_version = SSL_MINOR_VERSION_1; opt.max_version = SSL_MINOR_VERSION_1; } else if( strcmp( q, "tls1_1" ) == 0 ) { opt.min_version = SSL_MINOR_VERSION_2; opt.max_version = SSL_MINOR_VERSION_2; } else if( strcmp( q, "tls1_2" ) == 0 ) { opt.min_version = SSL_MINOR_VERSION_3; opt.max_version = SSL_MINOR_VERSION_3; } else goto usage; } else if( strcmp( p, "auth_mode" ) == 0 ) { if( strcmp( q, "none" ) == 0 ) opt.auth_mode = SSL_VERIFY_NONE; else if( strcmp( q, "optional" ) == 0 ) opt.auth_mode = SSL_VERIFY_OPTIONAL; else if( strcmp( q, "required" ) == 0 ) opt.auth_mode = SSL_VERIFY_REQUIRED; else goto usage; } else if( strcmp( p, "max_frag_len" ) == 0 ) { if( strcmp( q, "512" ) == 0 ) opt.mfl_code = SSL_MAX_FRAG_LEN_512; else if( strcmp( q, "1024" ) == 0 ) opt.mfl_code = SSL_MAX_FRAG_LEN_1024; else if( strcmp( q, "2048" ) == 0 ) opt.mfl_code = SSL_MAX_FRAG_LEN_2048; else if( strcmp( q, "4096" ) == 0 ) opt.mfl_code = SSL_MAX_FRAG_LEN_4096; else goto usage; } else if( strcmp( p, "trunc_hmac" ) == 0 ) { opt.trunc_hmac = atoi( q ); if( opt.trunc_hmac < 0 || opt.trunc_hmac > 1 ) goto usage; } else goto usage; } #if defined(POLARSSL_DEBUG_C) debug_set_threshold( opt.debug_level ); #endif if( opt.force_ciphersuite[0] > 0 ) { const ssl_ciphersuite_t *ciphersuite_info; ciphersuite_info = ssl_ciphersuite_from_id( opt.force_ciphersuite[0] ); if( opt.max_version != -1 && ciphersuite_info->min_minor_ver > opt.max_version ) { printf("forced ciphersuite not allowed with this protocol version\n"); ret = 2; goto usage; } if( opt.min_version != -1 && ciphersuite_info->max_minor_ver < opt.min_version ) { printf("forced ciphersuite not allowed with this protocol version\n"); ret = 2; goto usage; } if( opt.max_version > ciphersuite_info->max_minor_ver ) opt.max_version = ciphersuite_info->max_minor_ver; if( opt.min_version < ciphersuite_info->min_minor_ver ) opt.min_version = ciphersuite_info->min_minor_ver; } #if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED) /* * Unhexify the pre-shared key if any is given */ if( strlen( opt.psk ) ) { unsigned char c; size_t j; if( strlen( opt.psk ) % 2 != 0 ) { printf("pre-shared key not valid hex\n"); goto exit; } psk_len = strlen( opt.psk ) / 2; for( j = 0; j < strlen( opt.psk ); j += 2 ) { c = opt.psk[j]; if( c >= '0' && c <= '9' ) c -= '0'; else if( c >= 'a' && c <= 'f' ) c -= 'a' - 10; else if( c >= 'A' && c <= 'F' ) c -= 'A' - 10; else { printf("pre-shared key not valid hex\n"); goto exit; } psk[ j / 2 ] = c << 4; c = opt.psk[j + 1]; if( c >= '0' && c <= '9' ) c -= '0'; else if( c >= 'a' && c <= 'f' ) c -= 'a' - 10; else if( c >= 'A' && c <= 'F' ) c -= 'A' - 10; else { printf("pre-shared key not valid hex\n"); goto exit; } psk[ j / 2 ] |= c; } } #endif /* POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED */ #if defined(POLARSSL_SSL_ALPN) if( opt.alpn_string != NULL ) { p = (char *) opt.alpn_string; i = 0; /* Leave room for a final NULL in alpn_list */ while( i < (int) sizeof alpn_list - 1 && *p != '\0' ) { alpn_list[i++] = p; /* Terminate the current string and move on to next one */ while( *p != ',' && *p != '\0' ) p++; if( *p == ',' ) *p++ = '\0'; } } #endif /* POLARSSL_SSL_ALPN */ /* * 0. Initialize the RNG and the session data */ printf( "\n . Seeding the random number generator..." ); fflush( stdout ); entropy_init( &entropy ); if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy, (const unsigned char *) pers, strlen( pers ) ) ) != 0 ) { printf( " failed\n ! ctr_drbg_init returned -0x%x\n", -ret ); goto exit; } printf( " ok\n" ); #if defined(POLARSSL_X509_CRT_PARSE_C) /* * 1.1. Load the trusted CA */ printf( " . Loading the CA root certificate ..." ); fflush( stdout ); #if defined(POLARSSL_FS_IO) if( strlen( opt.ca_path ) ) if( strcmp( opt.ca_path, "none" ) == 0 ) ret = 0; else ret = x509_crt_parse_path( &cacert, opt.ca_path ); else if( strlen( opt.ca_file ) ) if( strcmp( opt.ca_file, "none" ) == 0 ) ret = 0; else ret = x509_crt_parse_file( &cacert, opt.ca_file ); else #endif #if defined(POLARSSL_CERTS_C) ret = x509_crt_parse( &cacert, (const unsigned char *) test_ca_list, strlen( test_ca_list ) ); #else { ret = 1; printf("POLARSSL_CERTS_C not defined."); } #endif if( ret < 0 ) { printf( " failed\n ! x509_crt_parse returned -0x%x\n\n", -ret ); goto exit; } printf( " ok (%d skipped)\n", ret ); /* * 1.2. Load own certificate and private key * * (can be skipped if client authentication is not required) */ printf( " . Loading the client cert. and key..." ); fflush( stdout ); #if defined(POLARSSL_FS_IO) if( strlen( opt.crt_file ) ) if( strcmp( opt.crt_file, "none" ) == 0 ) ret = 0; else ret = x509_crt_parse_file( &clicert, opt.crt_file ); else #endif #if defined(POLARSSL_CERTS_C) ret = x509_crt_parse( &clicert, (const unsigned char *) test_cli_crt, strlen( test_cli_crt ) ); #else { ret = 1; printf("POLARSSL_CERTS_C not defined."); } #endif if( ret != 0 ) { printf( " failed\n ! x509_crt_parse returned -0x%x\n\n", -ret ); goto exit; } #if defined(POLARSSL_FS_IO) if( strlen( opt.key_file ) ) if( strcmp( opt.key_file, "none" ) == 0 ) ret = 0; else ret = pk_parse_keyfile( &pkey, opt.key_file, "" ); else #endif #if defined(POLARSSL_CERTS_C) ret = pk_parse_key( &pkey, (const unsigned char *) test_cli_key, strlen( test_cli_key ), NULL, 0 ); #else { ret = 1; printf("POLARSSL_CERTS_C not defined."); } #endif if( ret != 0 ) { printf( " failed\n ! pk_parse_key returned -0x%x\n\n", -ret ); goto exit; } printf( " ok\n" ); #endif /* POLARSSL_X509_CRT_PARSE_C */ /* * 2. Start the connection */ if( opt.server_addr == NULL) opt.server_addr = opt.server_name; printf( " . Connecting to tcp/%s/%-4d...", opt.server_addr, opt.server_port ); fflush( stdout ); if( ( ret = net_connect( &server_fd, opt.server_addr, opt.server_port ) ) != 0 ) { printf( " failed\n ! net_connect returned -0x%x\n\n", -ret ); goto exit; } if( opt.nbio > 0 ) ret = net_set_nonblock( server_fd ); else ret = net_set_block( server_fd ); if( ret != 0 ) { printf( " failed\n ! net_set_(non)block() returned -0x%x\n\n", -ret ); goto exit; } printf( " ok\n" ); /* * 3. Setup stuff */ printf( " . Setting up the SSL/TLS structure..." ); fflush( stdout ); if( ( ret = ssl_init( &ssl ) ) != 0 ) { printf( " failed\n ! ssl_init returned -0x%x\n\n", -ret ); goto exit; } printf( " ok\n" ); #if defined(POLARSSL_X509_CRT_PARSE_C) if( opt.debug_level > 0 ) ssl_set_verify( &ssl, my_verify, NULL ); #endif ssl_set_endpoint( &ssl, SSL_IS_CLIENT ); ssl_set_authmode( &ssl, opt.auth_mode ); #if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH) if( ( ret = ssl_set_max_frag_len( &ssl, opt.mfl_code ) ) != 0 ) { printf( " failed\n ! ssl_set_max_frag_len returned %d\n\n", ret ); goto exit; } #endif #if defined(POLARSSL_SSL_TRUNCATED_HMAC) if( opt.trunc_hmac != 0 ) if( ( ret = ssl_set_truncated_hmac( &ssl, SSL_TRUNC_HMAC_ENABLED ) ) != 0 ) { printf( " failed\n ! ssl_set_truncated_hmac returned %d\n\n", ret ); goto exit; } #endif #if defined(POLARSSL_SSL_ALPN) if( opt.alpn_string != NULL ) if( ( ret = ssl_set_alpn_protocols( &ssl, alpn_list ) ) != 0 ) { printf( " failed\n ! ssl_set_alpn_protocols returned %d\n\n", ret ); goto exit; } #endif ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg ); ssl_set_dbg( &ssl, my_debug, stdout ); if( opt.nbio == 2 ) ssl_set_bio( &ssl, my_recv, &server_fd, my_send, &server_fd ); else ssl_set_bio( &ssl, net_recv, &server_fd, net_send, &server_fd ); #if defined(POLARSSL_SSL_SESSION_TICKETS) if( ( ret = ssl_set_session_tickets( &ssl, opt.tickets ) ) != 0 ) { printf( " failed\n ! ssl_set_session_tickets returned %d\n\n", ret ); goto exit; } #endif if( opt.force_ciphersuite[0] != DFL_FORCE_CIPHER ) ssl_set_ciphersuites( &ssl, opt.force_ciphersuite ); ssl_set_renegotiation( &ssl, opt.renegotiation ); ssl_legacy_renegotiation( &ssl, opt.allow_legacy ); #if defined(POLARSSL_X509_CRT_PARSE_C) if( strcmp( opt.ca_path, "none" ) != 0 && strcmp( opt.ca_file, "none" ) != 0 ) { ssl_set_ca_chain( &ssl, &cacert, NULL, opt.server_name ); } if( strcmp( opt.crt_file, "none" ) != 0 && strcmp( opt.key_file, "none" ) != 0 ) { if( ( ret = ssl_set_own_cert( &ssl, &clicert, &pkey ) ) != 0 ) { printf( " failed\n ! ssl_set_own_cert returned %d\n\n", ret ); goto exit; } } #endif #if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED) if( ( ret = ssl_set_psk( &ssl, psk, psk_len, (const unsigned char *) opt.psk_identity, strlen( opt.psk_identity ) ) ) != 0 ) { printf( " failed\n ! ssl_set_psk returned %d\n\n", ret ); goto exit; } #endif #if defined(POLARSSL_SSL_SERVER_NAME_INDICATION) if( ( ret = ssl_set_hostname( &ssl, opt.server_name ) ) != 0 ) { printf( " failed\n ! ssl_set_hostname returned %d\n\n", ret ); goto exit; } #endif if( opt.min_version != -1 ) ssl_set_min_version( &ssl, SSL_MAJOR_VERSION_3, opt.min_version ); if( opt.max_version != -1 ) ssl_set_max_version( &ssl, SSL_MAJOR_VERSION_3, opt.max_version ); /* * 4. 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 -0x%x\n", -ret ); if( ret == POLARSSL_ERR_X509_CERT_VERIFY_FAILED ) printf( " Unable to verify the server's certificate. " "Either it is invalid,\n" " or you didn't set ca_file or ca_path " "to an appropriate value.\n" " Alternatively, you may want to use " "auth_mode=optional for testing purposes.\n" ); printf( "\n" ); goto exit; } } printf( " ok\n [ Protocol is %s ]\n [ Ciphersuite is %s ]\n", ssl_get_version( &ssl ), ssl_get_ciphersuite( &ssl ) ); #if defined(POLARSSL_SSL_ALPN) if( opt.alpn_string != NULL ) { const char *alp = ssl_get_alpn_protocol( &ssl ); printf( " [ Application Layer Protocol is %s ]\n", alp ? alp : "(none)" ); } #endif if( opt.reconnect != 0 ) { printf(" . Saving session for reuse..." ); fflush( stdout ); if( ( ret = ssl_get_session( &ssl, &saved_session ) ) != 0 ) { printf( " failed\n ! ssl_get_session returned -0x%x\n\n", -ret ); goto exit; } printf( " ok\n" ); } #if defined(POLARSSL_X509_CRT_PARSE_C) /* * 5. Verify the server certificate */ printf( " . Verifying peer X.509 certificate..." ); if( ( ret = ssl_get_verify_result( &ssl ) ) != 0 ) { printf( " failed\n" ); if( ( ret & BADCERT_EXPIRED ) != 0 ) printf( " ! server certificate has expired\n" ); if( ( ret & BADCERT_REVOKED ) != 0 ) printf( " ! server certificate has been revoked\n" ); if( ( ret & BADCERT_CN_MISMATCH ) != 0 ) printf( " ! CN mismatch (expected CN=%s)\n", opt.server_name ); if( ( ret & BADCERT_NOT_TRUSTED ) != 0 ) printf( " ! self-signed or not signed by a trusted CA\n" ); printf( "\n" ); } else printf( " ok\n" ); if( ssl_get_peer_cert( &ssl ) != NULL ) { printf( " . Peer certificate information ...\n" ); x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ", ssl_get_peer_cert( &ssl ) ); printf( "%s\n", buf ); } #endif /* POLARSSL_X509_CRT_PARSE_C */ if( opt.renegotiate ) { /* * Perform renegotiation (this must be done when the server is waiting * for input from our side). */ printf( " . Performing renegotiation..." ); fflush( stdout ); while( ( ret = ssl_renegotiate( &ssl ) ) != 0 ) { if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE ) { printf( " failed\n ! ssl_renegotiate returned %d\n\n", ret ); goto exit; } } printf( " ok\n" ); } /* * 6. Write the GET request */ send_request: printf( " > Write to server:" ); fflush( stdout ); if( strcmp( opt.request_page, "SERVERQUIT" ) == 0 ) len = sprintf( (char *) buf, "%s", opt.request_page ); else { size_t tail_len = strlen( GET_REQUEST_END ); len = snprintf( (char *) buf, sizeof(buf) - 1, GET_REQUEST, opt.request_page ); /* Add padding to GET request to reach opt.request_size in length */ if( opt.request_size != DFL_REQUEST_SIZE && len + tail_len < (size_t) opt.request_size ) { memset( buf + len, 'A', opt.request_size - len - tail_len ); len += opt.request_size - len - tail_len; } strncpy( (char *) buf + len, GET_REQUEST_END, sizeof(buf) - len - 1 ); len += tail_len; } /* Truncate if request size is smaller than the "natural" size */ if( opt.request_size != DFL_REQUEST_SIZE && len > opt.request_size ) { len = opt.request_size; /* Still end with \r\n unless that's really not possible */ if( len >= 2 ) buf[len - 2] = '\r'; if( len >= 1 ) buf[len - 1] = '\n'; } for( written = 0, frags = 0; written < len; written += ret, frags++ ) { while( ( ret = ssl_write( &ssl, buf + written, len - written ) ) <= 0 ) { if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE ) { printf( " failed\n ! ssl_write returned -0x%x\n\n", -ret ); goto exit; } } } buf[written] = '\0'; printf( " %d bytes written in %d fragments\n\n%s\n", written, frags, (char *) buf ); /* * 7. Read the HTTP response */ printf( " < Read from server:" ); 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 == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY ) break; if( ret < 0 ) { printf( "failed\n ! ssl_read returned -0x%x\n\n", -ret ); break; } if( ret == 0 ) { printf("\n\nEOF\n\n"); ssl_close_notify( &ssl ); break; } len = ret; buf[len] = '\0'; printf( " %d bytes read\n\n%s", len, (char *) buf ); } while( 1 ); if( opt.reconnect != 0 ) { --opt.reconnect; net_close( server_fd ); #if defined(POLARSSL_TIMING_C) if( opt.reco_delay > 0 ) m_sleep( 1000 * opt.reco_delay ); #endif printf( " . Reconnecting with saved session..." ); fflush( stdout ); if( ( ret = ssl_session_reset( &ssl ) ) != 0 ) { printf( " failed\n ! ssl_session_reset returned -0x%x\n\n", -ret ); goto exit; } if( ( ret = ssl_set_session( &ssl, &saved_session ) ) != 0 ) { printf( " failed\n ! ssl_set_session returned %d\n\n", ret ); goto exit; } if( ( ret = net_connect( &server_fd, opt.server_name, opt.server_port ) ) != 0 ) { printf( " failed\n ! net_connect returned -0x%x\n\n", -ret ); goto exit; } 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 -0x%x\n\n", -ret ); goto exit; } } printf( " ok\n" ); goto send_request; } exit: if( ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY ) ret = 0; #ifdef POLARSSL_ERROR_C if( ret != 0 ) { char error_buf[100]; polarssl_strerror( ret, error_buf, 100 ); printf("Last error was: -0x%X - %s\n\n", -ret, error_buf ); } #endif if( server_fd ) net_close( server_fd ); #if defined(POLARSSL_X509_CRT_PARSE_C) x509_crt_free( &clicert ); x509_crt_free( &cacert ); pk_free( &pkey ); #endif ssl_session_free( &saved_session ); ssl_free( &ssl ); ctr_drbg_free( &ctr_drbg ); entropy_free( &entropy ); memset( &ssl, 0, sizeof( ssl ) ); #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 ); }
char *mlsc_network_request(char *request, int debug_level) { int ret, len, server_fd = -1; char tmpbuf[BUFFER_SIZE]; char *buf = malloc(BUFFER_SIZE); const char *pers = "ssl_client1"; entropy_context entropy; ctr_drbg_context ctr_drbg; ssl_context ssl; x509_crt cacert; #if defined(POLARSSL_DEBUG_C) if (debug_level) debug_set_threshold(1); #endif /* * 0. Initialize the RNG and the session data */ memset(&ssl, 0, sizeof(ssl_context)); x509_crt_init(&cacert); if (debug_level) fprintf(stderr, "\n . Seeding the random number generator..."); entropy_init(&entropy); if ((ret = ctr_drbg_init(&ctr_drbg, entropy_func, &entropy, (const unsigned char *) pers, strlen(pers))) != 0) { if (debug_level) fprintf(stderr, " failed\n ! ctr_drbg_init returned %d\n", ret); goto exit; } if (debug_level) fprintf(stderr, " ok\n"); /* * 0. Initialize certificates */ if (debug_level) fprintf(stderr, " . Loading the CA root certificate ..."); fflush(stdout); #if defined(POLARSSL_CERTS_C) ret = x509_crt_parse(&cacert, (const unsigned char *) test_ca_list, strlen(test_ca_list)); #else ret = 1; if (debug_level) fprintf(stderr, "POLARSSL_CERTS_C not defined."); #endif if (ret < 0) { if (debug_level) fprintf(stderr, " failed\n ! x509_crt_parse returned -0x%x\n\n", -ret); goto exit; } if (debug_level) fprintf(stderr, " ok (%d skipped)\n", ret); /* * 1. Start the connection */ if (debug_level) fprintf(stderr, " . Connecting to tcp/%s/%4d...", SERVER_NAME, SERVER_PORT); if ((ret = net_connect(&server_fd, SERVER_NAME, SERVER_PORT)) != 0) { if (debug_level) fprintf(stderr, " failed\n ! net_connect returned %d\n\n", ret); goto exit; } if (debug_level) fprintf(stderr, " ok\n"); /* * 2. Setup stuff */ if (debug_level) fprintf(stderr, " . Setting up the SSL/TLS structure..."); if ((ret = ssl_init(&ssl)) != 0) { if (debug_level) fprintf(stderr, " failed\n ! ssl_init returned %d\n\n", ret); goto exit; } if (debug_level) fprintf(stderr, " ok\n"); ssl_set_endpoint(&ssl, SSL_IS_CLIENT); /* OPTIONAL is not optimal for security, * but makes interop easier in this simplified example */ ssl_set_authmode(&ssl, SSL_VERIFY_OPTIONAL); ssl_set_ca_chain(&ssl, &cacert, NULL, SERVER_NAME); ssl_set_rng(&ssl, ctr_drbg_random, &ctr_drbg); ssl_set_bio(&ssl, net_recv, &server_fd, net_send, &server_fd); /* * 4. Handshake */ if (debug_level) fprintf(stderr, " . Performing the SSL/TLS handshake..."); while ((ret = ssl_handshake(&ssl)) != 0) { if (ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE) { fprintf(stderr, " failed\n ! ssl_handshake returned -0x%x\n\n", -ret); goto exit; } } if (debug_level) fprintf(stderr, " ok\n"); /* * 5. Verify the server certificate */ if (debug_level) fprintf(stderr, " . Verifying peer X.509 certificate..."); /* In real life, we may want to bail out when ret != 0 */ if ((ret = ssl_get_verify_result(&ssl)) != 0) { if (debug_level) fprintf(stderr, " failed\n"); if ((ret & BADCERT_EXPIRED) != 0 && debug_level) fprintf(stderr, " ! server certificate has expired\n"); if ((ret & BADCERT_REVOKED) != 0 && debug_level) fprintf(stderr, " ! server certificate has been revoked\n"); if ((ret & BADCERT_CN_MISMATCH) != 0 && debug_level) fprintf(stderr, " ! CN mismatch (expected CN=%s)\n", SERVER_NAME); if ((ret & BADCERT_NOT_TRUSTED) != 0 && debug_level) fprintf(stderr, " ! self-signed or not signed by a trusted CA\n"); if (debug_level) fprintf(stderr, "\n"); } else if (debug_level) fprintf(stderr, " ok\n"); /* * 3. Write the GET request */ if (debug_level) fprintf(stderr, " > Write to server:"); len = sprintf((char *) tmpbuf, POST_REQUEST, strlen(request), request); while ((ret = ssl_write(&ssl, tmpbuf, len)) <= 0) { if (ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE) { if (debug_level) fprintf(stderr, " failed\n ! ssl_write returned %d\n\n", ret); goto exit; } } len = ret; if (debug_level) fprintf(stderr, " %d bytes written\n\n%s", len, (char *) tmpbuf); /* * 7. Read the HTTP response */ if (debug_level) fprintf(stderr, " < Read from server:"); do { len = BUFFER_SIZE - 1; memset(tmpbuf, 0, BUFFER_SIZE); ret = ssl_read(&ssl, tmpbuf, len); if (ret == POLARSSL_ERR_NET_WANT_READ || ret == POLARSSL_ERR_NET_WANT_WRITE) continue; if (ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY) break; if (ret < 0) { if (debug_level) fprintf(stderr, "failed\n ! ssl_read returned %d\n\n", ret); break; } if (ret == 0) { if (debug_level) fprintf(stderr, "\n\nEOF\n\n"); break; } len = ret; if (debug_level) fprintf(stderr, " %d bytes read\n\n%s\n", len, (char *) tmpbuf); strcpy(buf, tmpbuf); } while (1); ssl_close_notify(&ssl); exit: #ifdef POLARSSL_ERROR_C if (ret != 0) { char error_buf[100]; polarssl_strerror(ret, error_buf, 100); if (debug_level) fprintf(stderr, "Last error was: %d - %s\n\n", ret, error_buf); } #endif if (server_fd != -1) net_close(server_fd); x509_crt_free(&cacert); ssl_free(&ssl); ctr_drbg_free(&ctr_drbg); entropy_free(&entropy); memset(&ssl, 0, sizeof(ssl)); return (buf); }
int main( int argc, char *argv[] ) { int ret, len, server_fd = -1; unsigned char buf[1024]; const char *pers = "dtls_client"; int retry_left = MAX_RETRY; entropy_context entropy; ctr_drbg_context ctr_drbg; ssl_context ssl; x509_crt cacert; ((void) argc); ((void) argv); #if defined(POLARSSL_DEBUG_C) debug_set_threshold( DEBUG_LEVEL ); #endif /* * 0. Initialize the RNG and the session data */ memset( &ssl, 0, sizeof( ssl_context ) ); x509_crt_init( &cacert ); printf( "\n . Seeding the random number generator..." ); fflush( stdout ); entropy_init( &entropy ); 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" ); /* * 0. Initialize certificates */ printf( " . Loading the CA root certificate ..." ); fflush( stdout ); #if defined(POLARSSL_CERTS_C) ret = x509_crt_parse( &cacert, (const unsigned char *) test_ca_list, strlen( test_ca_list ) ); #else ret = 1; printf("POLARSSL_CERTS_C not defined."); #endif if( ret < 0 ) { printf( " failed\n ! x509_crt_parse returned -0x%x\n\n", -ret ); goto exit; } printf( " ok (%d skipped)\n", ret ); /* * 1. Start the connection */ printf( " . Connecting to udp/%s/%4d...", SERVER_NAME, SERVER_PORT ); fflush( stdout ); if( ( ret = net_connect( &server_fd, SERVER_ADDR, SERVER_PORT, NET_PROTO_UDP ) ) != 0 ) { printf( " failed\n ! net_connect returned %d\n\n", ret ); goto exit; } printf( " ok\n" ); /* * 2. Setup stuff */ printf( " . Setting up the DTLS structure..." ); fflush( stdout ); 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_CLIENT ); ssl_set_transport( &ssl, SSL_TRANSPORT_DATAGRAM ); /* OPTIONAL is usually a bad choice for security, but makes interop easier * in this simplified example, in which the ca chain is hardcoded. * Production code should set a proper ca chain and use REQUIRED. */ ssl_set_authmode( &ssl, SSL_VERIFY_OPTIONAL ); ssl_set_ca_chain( &ssl, &cacert, NULL, SERVER_NAME ); ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg ); ssl_set_dbg( &ssl, my_debug, stdout ); ssl_set_bio_timeout( &ssl, &server_fd, net_send, net_recv, net_recv_timeout, READ_TIMEOUT_MS ); /* * 4. Handshake */ printf( " . Performing the SSL/TLS handshake..." ); fflush( stdout ); do ret = ssl_handshake( &ssl ); while( ret == POLARSSL_ERR_NET_WANT_READ || ret == POLARSSL_ERR_NET_WANT_WRITE ); if( ret != 0 ) { printf( " failed\n ! ssl_handshake returned -0x%x\n\n", -ret ); goto exit; } printf( " ok\n" ); /* * 5. Verify the server certificate */ printf( " . Verifying peer X.509 certificate..." ); /* In real life, we would have used SSL_VERIFY_REQUIRED so that the * handshake would not succeed if the peer's cert is bad. Even if we used * SSL_VERIFY_OPTIONAL, we would bail out here if ret != 0 */ if( ( ret = ssl_get_verify_result( &ssl ) ) != 0 ) { printf( " failed\n" ); if( ( ret & BADCERT_EXPIRED ) != 0 ) printf( " ! server certificate has expired\n" ); if( ( ret & BADCERT_REVOKED ) != 0 ) printf( " ! server certificate has been revoked\n" ); if( ( ret & BADCERT_CN_MISMATCH ) != 0 ) printf( " ! CN mismatch (expected CN=%s)\n", SERVER_NAME ); if( ( ret & BADCERT_NOT_TRUSTED ) != 0 ) printf( " ! self-signed or not signed by a trusted CA\n" ); printf( "\n" ); } else printf( " ok\n" ); /* * 6. Write the echo request */ send_request: printf( " > Write to server:" ); fflush( stdout ); len = sizeof( MESSAGE ) - 1; do ret = ssl_write( &ssl, (unsigned char *) MESSAGE, 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, MESSAGE ); /* * 7. Read the echo response */ printf( " < Read from server:" ); 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" ); if( retry_left-- > 0 ) goto send_request; goto exit; 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 exit; } } len = ret; printf( " %d bytes read\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" ); /* * 9. 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( server_fd != -1 ) net_close( server_fd ); x509_crt_free( &cacert ); ssl_free( &ssl ); 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 ); }
int main( int argc, char *argv[] ) { int ret, len; int listen_fd; int client_fd = -1; unsigned char buf[1024]; const char *pers = "ssl_server"; 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 ((void) argc); ((void) argv); memset( &ssl, 0, sizeof(ssl_context) ); #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 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" ); /* * 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 SSL 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_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; } 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, NULL ) ) != 0 ) { printf( " failed\n ! net_accept returned %d\n\n", ret ); goto exit; } ssl_set_bio( &ssl, net_recv, &client_fd, net_send, &client_fd ); printf( " ok\n" ); /* * 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 reset; } } 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 -0x%x\n", -ret ); break; } break; } len = ret; printf( " %d bytes read\n\n%s", len, (char *) buf ); if( ret > 0 ) break; } while( 1 ); /* * 7. Write the 200 Response */ printf( " > Write to client:" ); fflush( stdout ); 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( " failed\n ! peer closed the connection\n\n" ); goto reset; } 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 ); printf( " . Closing the connection..." ); while( ( ret = ssl_close_notify( &ssl ) ) < 0 ) { if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE ) { printf( " failed\n ! ssl_close_notify returned %d\n\n", ret ); goto reset; } } printf( " ok\n" ); ret = 0; goto reset; 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 ); #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 return( ret ); }
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 ); }