/* * SSL client with certificate authentication * * Copyright (C) 2006-2013, Brainspark B.V. * * This file is part of PolarSSL (http://www.polarssl.org) * Lead Maintainer: Paul Bakker * * 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_ENTROPY_C) || \ !defined(POLARSSL_SSL_TLS_C) || !defined(POLARSSL_SSL_CLI_C) || \ !defined(POLARSSL_NET_C) || !defined(POLARSSL_CTR_DRBG_C) #include int main( int argc, char *argv[] ) { ((void) argc); ((void) argv); printf("POLARSSL_ENTROPY_C and/or " "POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_CLI_C and/or " "POLARSSL_NET_C and/or POLARSSL_CTR_DRBG_C not defined.\n"); return( 0 ); } #else #include #include #include #include "polarssl/net.h" #include "polarssl/ssl.h" #include "polarssl/entropy.h" #include "polarssl/ctr_drbg.h" #include "polarssl/certs.h" #include "polarssl/x509.h" #include "polarssl/error.h" #include "polarssl/debug.h" #if defined(POLARSSL_TIMING_C) #include "polarssl/timing.h" #endif #if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32) #if !defined snprintf #define snprintf _snprintf #endif #endif #define DFL_SERVER_NAME "localhost" #define DFL_SERVER_ADDR NULL #define DFL_SERVER_PORT 4433 #define DFL_REQUEST_PAGE "/" #define DFL_REQUEST_SIZE -1 #define DFL_DEBUG_LEVEL 0 #define DFL_NBIO 0 #define DFL_READ_TIMEOUT 0 #define DFL_MAX_RESEND 0 #define DFL_CA_FILE "" #define DFL_CA_PATH "" #define DFL_CRT_FILE "" #define DFL_KEY_FILE "" #define DFL_PSK "" #define DFL_PSK_IDENTITY "Client_identity" #define DFL_FORCE_CIPHER 0 #define DFL_RENEGOTIATION SSL_RENEGOTIATION_DISABLED #define DFL_ALLOW_LEGACY SSL_LEGACY_NO_RENEGOTIATION #define DFL_RENEGOTIATE 0 #define DFL_EXCHANGES 1 #define DFL_MIN_VERSION -1 #define DFL_MAX_VERSION -1 #define DFL_AUTH_MODE SSL_VERIFY_REQUIRED #define DFL_MFL_CODE SSL_MAX_FRAG_LEN_NONE #define DFL_TRUNC_HMAC 0 #define DFL_RECONNECT 0 #define DFL_RECO_DELAY 0 #define DFL_TICKETS SSL_SESSION_TICKETS_ENABLED #define DFL_ALPN_STRING NULL #define DFL_TRANSPORT SSL_TRANSPORT_STREAM #define DFL_HS_TO_MIN 0 #define DFL_HS_TO_MAX 0 #define GET_REQUEST "GET %s HTTP/1.0\r\nExtra-header: " #define GET_REQUEST_END "\r\n\r\n" /* * global options */ struct options { const char *server_name; /* hostname of the server (client only) */ const char *server_addr; /* address of the server (client only) */ int server_port; /* port on which the ssl service runs */ int debug_level; /* level of debugging */ int nbio; /* should I/O be blocking? */ uint32_t read_timeout; /* timeout on ssl_read() in milliseconds */ int max_resend; /* DTLS times to resend on read timeout */ const char *request_page; /* page on server to request */ int request_size; /* pad request with header to requested size */ const char *ca_file; /* the file with the CA certificate(s) */ const char *ca_path; /* the path with the CA certificate(s) reside */ const char *crt_file; /* the file with the client certificate */ const char *key_file; /* the file with the client key */ const char *psk; /* the pre-shared key */ const char *psk_identity; /* the pre-shared key identity */ int force_ciphersuite[2]; /* protocol/ciphersuite to use, or all */ int renegotiation; /* enable / disable renegotiation */ int allow_legacy; /* allow legacy renegotiation */ int renegotiate; /* attempt renegotiation? */ int renego_delay; /* delay before enforcing renegotiation */ int exchanges; /* number of data exchanges */ int min_version; /* minimum protocol version accepted */ int max_version; /* maximum protocol version accepted */ int auth_mode; /* verify mode for connection */ unsigned char mfl_code; /* code for maximum fragment length */ int trunc_hmac; /* negotiate truncated hmac or not */ int reconnect; /* attempt to resume session */ int reco_delay; /* delay in seconds before resuming session */ int tickets; /* enable / disable session tickets */ const char *alpn_string; /* ALPN supported protocols */ int transport; /* TLS or DTLS? */ uint32_t hs_to_min; /* Initial value of DTLS handshake timer */ uint32_t hs_to_max; /* Max value of DTLS handshake timer */ } opt; static void my_debug( void *ctx, int level, const char *str ) { ((void) level); fprintf( (FILE *) ctx, "%s", str ); fflush( (FILE *) ctx ); } /* * Test recv/send functions that make sure each try returns * WANT_READ/WANT_WRITE at least once before sucesseding */ static int my_recv( void *ctx, unsigned char *buf, size_t len ) { static int first_try = 1; int ret; if( first_try ) { first_try = 0; return( POLARSSL_ERR_NET_WANT_READ ); } ret = net_recv( ctx, buf, len ); if( ret != POLARSSL_ERR_NET_WANT_READ ) first_try = 1; /* Next call will be a new operation */ return( ret ); } static int my_send( void *ctx, const unsigned char *buf, size_t len ) { static int first_try = 1; int ret; if( first_try ) { first_try = 0; return( POLARSSL_ERR_NET_WANT_WRITE ); } ret = net_send( ctx, buf, len ); if( ret != POLARSSL_ERR_NET_WANT_WRITE ) first_try = 1; /* Next call will be a new operation */ return( ret ); } #if defined(POLARSSL_X509_CRT_PARSE_C) /* * Enabled if debug_level > 1 in code below */ static int my_verify( void *data, x509_crt *crt, int depth, int *flags ) { char buf[1024]; ((void) data); printf( "\nVerify requested for (Depth %d):\n", depth ); x509_crt_info( buf, sizeof( buf ) - 1, "", crt ); printf( "%s", buf ); if( ( (*flags) & BADCERT_EXPIRED ) != 0 ) printf( " ! server certificate has expired\n" ); if( ( (*flags) & BADCERT_REVOKED ) != 0 ) printf( " ! server certificate has been revoked\n" ); if( ( (*flags) & BADCERT_CN_MISMATCH ) != 0 ) printf( " ! CN mismatch\n" ); if( ( (*flags) & BADCERT_NOT_TRUSTED ) != 0 ) printf( " ! self-signed or not signed by a trusted CA\n" ); if( ( (*flags) & BADCRL_NOT_TRUSTED ) != 0 ) printf( " ! CRL not trusted\n" ); if( ( (*flags) & BADCRL_EXPIRED ) != 0 ) printf( " ! CRL expired\n" ); if( ( (*flags) & BADCERT_OTHER ) != 0 ) printf( " ! other (unknown) flag\n" ); if ( ( *flags ) == 0 ) printf( " This certificate has no flags\n" ); return( 0 ); } #endif /* POLARSSL_X509_CRT_PARSE_C */ #if defined(POLARSSL_X509_CRT_PARSE_C) #if defined(POLARSSL_FS_IO) #define USAGE_IO \ " ca_file=%%s The single file containing the top-level CA(s) you fully trust\n" \ " default: \"\" (pre-loaded)\n" \ " ca_path=%%s The path containing the top-level CA(s) you fully trust\n" \ " default: \"\" (pre-loaded) (overrides ca_file)\n" \ " crt_file=%%s Your own cert and chain (in bottom to top order, top may be omitted)\n" \ " default: \"\" (pre-loaded)\n" \ " key_file=%%s default: \"\" (pre-loaded)\n" #else #define USAGE_IO \ " No file operations available (POLARSSL_FS_IO not defined)\n" #endif /* POLARSSL_FS_IO */ #else #define USAGE_IO "" #endif /* POLARSSL_X509_CRT_PARSE_C */ #if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED) #define USAGE_PSK \ " psk=%%s default: \"\" (in hex, without 0x)\n" \ " psk_identity=%%s default: \"Client_identity\"\n" #else #define USAGE_PSK "" #endif /* POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED */ #if defined(POLARSSL_SSL_SESSION_TICKETS) #define USAGE_TICKETS \ " tickets=%%d default: 1 (enabled)\n" #else #define USAGE_TICKETS "" #endif /* POLARSSL_SSL_SESSION_TICKETS */ #if defined(POLARSSL_SSL_TRUNCATED_HMAC) #define USAGE_TRUNC_HMAC \ " trunc_hmac=%%d default: 0 (disabled)\n" #else #define USAGE_TRUNC_HMAC "" #endif /* POLARSSL_SSL_TRUNCATED_HMAC */ #if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH) #define USAGE_MAX_FRAG_LEN \ " max_frag_len=%%d default: 16384 (tls default)\n" \ " options: 512, 1024, 2048, 4096\n" #else #define USAGE_MAX_FRAG_LEN "" #endif /* POLARSSL_SSL_MAX_FRAGMENT_LENGTH */ #if defined(POLARSSL_TIMING_C) #define USAGE_TIME \ " reco_delay=%%d default: 0 seconds\n" #else #define USAGE_TIME "" #endif /* POLARSSL_TIMING_C */ #if defined(POLARSSL_SSL_ALPN) #define USAGE_ALPN \ " alpn=%%s default: \"\" (disabled)\n" \ " example: spdy/1,http/1.1\n" #else #define USAGE_ALPN "" #endif /* POLARSSL_SSL_ALPN */ #if defined(POLARSSL_SSL_PROTO_DTLS) #define USAGE_DTLS \ " dtls=%%d default: 0 (TLS)\n" \ " hs_timeout=%%d-%%d default: (library default: 1000-60000)\n" \ " range of DTLS handshake timeouts in millisecs\n" #else #define USAGE_DTLS "" #endif #define USAGE \ "\n usage: ssl_client2 param=<>...\n" \ "\n acceptable parameters:\n" \ " server_name=%%s default: localhost\n" \ " server_addr=%%s default: given by name\n" \ " server_port=%%d default: 4433\n" \ " request_page=%%s default: \".\"\n" \ " request_size=%%d default: about 34 (basic request)\n" \ " (minimum: 0, max: 16384)\n" \ " debug_level=%%d default: 0 (disabled)\n" \ " nbio=%%d default: 0 (blocking I/O)\n" \ " options: 1 (non-blocking), 2 (added delays)\n" \ " read_timeout=%%d default: 0 (no timeout)\n" \ " max_resend=%%d default: 0 (no resend on timeout)\n" \ "\n" \ USAGE_DTLS \ "\n" \ " auth_mode=%%s default: \"optional\"\n" \ " options: none, optional, required\n" \ USAGE_IO \ "\n" \ USAGE_PSK \ "\n" \ " renegotiation=%%d default: 1 (enabled)\n" \ " allow_legacy=%%d default: 0 (disabled)\n" \ " renegotiate=%%d default: 0 (disabled)\n" \ " exchanges=%%d default: 1\n" \ " reconnect=%%d default: 0 (disabled)\n" \ USAGE_TIME \ USAGE_TICKETS \ USAGE_MAX_FRAG_LEN \ USAGE_TRUNC_HMAC \ USAGE_ALPN \ "\n" \ " min_version=%%s default: \"\" (ssl3)\n" \ " max_version=%%s default: \"\" (tls1_2)\n" \ " force_version=%%s default: \"\" (none)\n" \ " options: ssl3, tls1, tls1_1, tls1_2, dtls1, dtls1_2\n" \ " auth_mode=%%s default: \"required\"\n" \ " options: none, optional, required\n" \ "\n" \ " force_ciphersuite= default: all enabled\n"\ " acceptable ciphersuite names:\n" int main( int argc, char *argv[] ) { int ret = 0, len, tail_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.read_timeout = DFL_READ_TIMEOUT; opt.max_resend = DFL_MAX_RESEND; 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.exchanges = DFL_EXCHANGES; 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; opt.transport = DFL_TRANSPORT; opt.hs_to_min = DFL_HS_TO_MIN; opt.hs_to_max = DFL_HS_TO_MAX; 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, "dtls" ) == 0 ) { int t = atoi( q ); if( t == 0 ) opt.transport = SSL_TRANSPORT_STREAM; else if( t == 1 ) opt.transport = SSL_TRANSPORT_DATAGRAM; else 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, "read_timeout" ) == 0 ) opt.read_timeout = atoi( q ); else if( strcmp( p, "max_resend" ) == 0 ) { opt.max_resend = atoi( q ); if( opt.max_resend < 0 ) 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, "exchanges" ) == 0 ) { opt.exchanges = atoi( q ); if( opt.exchanges < 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 || strcmp( q, "dtls1" ) == 0 ) opt.min_version = SSL_MINOR_VERSION_2; else if( strcmp( q, "tls1_2" ) == 0 || strcmp( q, "dtls1_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 || strcmp( q, "dtls1" ) == 0 ) opt.max_version = SSL_MINOR_VERSION_2; else if( strcmp( q, "tls1_2" ) == 0 || strcmp( q, "dtls1_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 if( strcmp( q, "dtls1" ) == 0 ) { opt.min_version = SSL_MINOR_VERSION_2; opt.max_version = SSL_MINOR_VERSION_2; opt.transport = SSL_TRANSPORT_DATAGRAM; } else if( strcmp( q, "dtls1_2" ) == 0 ) { opt.min_version = SSL_MINOR_VERSION_3; opt.max_version = SSL_MINOR_VERSION_3; opt.transport = SSL_TRANSPORT_DATAGRAM; } 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 if( strcmp( p, "hs_timeout" ) == 0 ) { if( ( p = strchr( q, '-' ) ) == NULL ) goto usage; *p++ = '\0'; opt.hs_to_min = atoi( q ); opt.hs_to_max = atoi( p ); if( opt.hs_to_min == 0 || opt.hs_to_max < opt.hs_to_min ) 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 the server selects a version that's not supported by * this suite, then there will be no common ciphersuite... */ if( opt.max_version == -1 || 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; /* DTLS starts with TLS 1.1 */ if( opt.transport == SSL_TRANSPORT_DATAGRAM && opt.min_version < SSL_MINOR_VERSION_2 ) opt.min_version = SSL_MINOR_VERSION_2; } } #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 %s/%s/%-4d...", opt.transport == SSL_TRANSPORT_STREAM ? "tcp" : "udp", opt.server_addr, opt.server_port ); fflush( stdout ); if( ( ret = net_connect( &server_fd, opt.server_addr, opt.server_port, opt.transport == SSL_TRANSPORT_STREAM ? NET_PROTO_TCP : NET_PROTO_UDP ) ) != 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; } #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_PROTO_DTLS) if( ( ret = ssl_set_transport( &ssl, opt.transport ) ) != 0 ) { printf( " failed\n ! selected transport is not available\n" ); goto exit; } if( opt.hs_to_min != DFL_HS_TO_MIN || opt.hs_to_max != DFL_HS_TO_MAX ) ssl_set_handshake_timeout( &ssl, opt.hs_to_min, opt.hs_to_max ); #endif /* POLARSSL_SSL_PROTO_DTLS */ #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_timeout( &ssl, &server_fd, my_send, my_recv, NULL, opt.read_timeout ); else ssl_set_bio_timeout( &ssl, &server_fd, net_send, net_recv, #if defined(POLARSSL_HAVE_TIME) opt.nbio == 0 ? net_recv_timeout : NULL, #else NULL, #endif opt.read_timeout ); #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 ) { ret = ssl_set_min_version( &ssl, SSL_MAJOR_VERSION_3, opt.min_version ); if( ret != 0 ) { printf( " failed\n ! selected min_version is not available\n" ); goto exit; } } if( opt.max_version != -1 ) { ret = ssl_set_max_version( &ssl, SSL_MAJOR_VERSION_3, opt.max_version ); if( ret != 0 ) { printf( " failed\n ! selected max_version is not available\n" ); goto exit; } } printf( " ok\n" ); /* * 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 ); len = snprintf( (char *) buf, sizeof(buf) - 1, GET_REQUEST, opt.request_page ); tail_len = strlen( GET_REQUEST_END ); /* Add padding to GET request to reach opt.request_size in length */ if( opt.request_size != DFL_REQUEST_SIZE && len + tail_len < 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'; } if( opt.transport == SSL_TRANSPORT_STREAM ) { 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; } } } } else /* Not stream, so datagram */ { 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; } frags = 1; written = ret; } 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 ); /* * TLS and DTLS need different reading styles (stream vs datagram) */ if( opt.transport == SSL_TRANSPORT_STREAM ) { 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" ); ret = 0; goto close_notify; case 0: case POLARSSL_ERR_NET_CONN_RESET: printf( " connection was reset by peer\n" ); ret = 0; goto reconnect; default: printf( " ssl_read returned -0x%x\n", -ret ); goto exit; } } len = ret; buf[len] = '\0'; printf( " %d bytes read\n\n%s", len, (char *) buf ); /* End of message should be detected according to the syntax of the * application protocol (eg HTTP), just use a dummy test here. */ if( ret > 0 && buf[len-1] == '\n' ) { ret = 0; break; } } while( 1 ); } else /* Not stream, so datagram */ { 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" ); if( opt.max_resend-- > 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", -ret ); goto exit; } } len = ret; buf[len] = '\0'; printf( " %d bytes read\n\n%s", len, (char *) buf ); ret = 0; } /* * 7b. Continue doing data exchanges? */ if( --opt.exchanges > 0 ) goto send_request; /* * 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. Reconnect? */ reconnect: 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_addr, opt.server_port, opt.transport == SSL_TRANSPORT_STREAM ? NET_PROTO_TCP : NET_PROTO_UDP ) ) != 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; } 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; } /* * Cleanup and exit */ exit: #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 ); #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_BIGNUM_C && POLARSSL_ENTROPY_C && POLARSSL_SSL_TLS_C && POLARSSL_SSL_CLI_C && POLARSSL_NET_C && POLARSSL_RSA_C && POLARSSL_CTR_DRBG_C */