1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 2012 - 2018, Daniel Stenberg, <daniel (at) haxx.se>, et al. 9 * Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan (at) gmail.com> 10 * 11 * This software is licensed as described in the file COPYING, which 12 * you should have received as part of this distribution. The terms 13 * are also available at https://curl.haxx.se/docs/copyright.html. 14 * 15 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 16 * copies of the Software, and permit persons to whom the Software is 17 * furnished to do so, under the terms of the COPYING file. 18 * 19 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 20 * KIND, either express or implied. 21 * 22 ***************************************************************************/ 23 24 /* 25 * Source file for all PolarSSL-specific code for the TLS/SSL layer. No code 26 * but vtls.c should ever call or use these functions. 27 * 28 */ 29 30 #include "curl_setup.h" 31 32 #ifdef USE_POLARSSL 33 #include <polarssl/net.h> 34 #include <polarssl/ssl.h> 35 #include <polarssl/certs.h> 36 #include <polarssl/x509.h> 37 #include <polarssl/version.h> 38 #include <polarssl/sha256.h> 39 40 #if POLARSSL_VERSION_NUMBER < 0x01030000 41 #error too old PolarSSL 42 #endif 43 44 #include <polarssl/error.h> 45 #include <polarssl/entropy.h> 46 #include <polarssl/ctr_drbg.h> 47 48 #include "urldata.h" 49 #include "sendf.h" 50 #include "inet_pton.h" 51 #include "polarssl.h" 52 #include "vtls.h" 53 #include "parsedate.h" 54 #include "connect.h" /* for the connect timeout */ 55 #include "select.h" 56 #include "strcase.h" 57 #include "polarssl_threadlock.h" 58 #include "curl_printf.h" 59 #include "curl_memory.h" 60 /* The last #include file should be: */ 61 #include "memdebug.h" 62 63 /* See https://tls.mbed.org/discussions/generic/ 64 howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der 65 */ 66 #define RSA_PUB_DER_MAX_BYTES (38 + 2 * POLARSSL_MPI_MAX_SIZE) 67 #define ECP_PUB_DER_MAX_BYTES (30 + 2 * POLARSSL_ECP_MAX_BYTES) 68 69 #define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \ 70 RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES) 71 72 struct ssl_backend_data { 73 ctr_drbg_context ctr_drbg; 74 entropy_context entropy; 75 ssl_context ssl; 76 int server_fd; 77 x509_crt cacert; 78 x509_crt clicert; 79 x509_crl crl; 80 rsa_context rsa; 81 }; 82 83 #define BACKEND connssl->backend 84 85 /* apply threading? */ 86 #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32) 87 #define THREADING_SUPPORT 88 #endif 89 90 #ifndef POLARSSL_ERROR_C 91 #define error_strerror(x,y,z) 92 #endif /* POLARSSL_ERROR_C */ 93 94 95 #if defined(THREADING_SUPPORT) 96 static entropy_context entropy; 97 98 static int entropy_init_initialized = 0; 99 100 /* start of entropy_init_mutex() */ 101 static void entropy_init_mutex(entropy_context *ctx) 102 { 103 /* lock 0 = entropy_init_mutex() */ 104 Curl_polarsslthreadlock_lock_function(0); 105 if(entropy_init_initialized == 0) { 106 entropy_init(ctx); 107 entropy_init_initialized = 1; 108 } 109 Curl_polarsslthreadlock_unlock_function(0); 110 } 111 /* end of entropy_init_mutex() */ 112 113 /* start of entropy_func_mutex() */ 114 static int entropy_func_mutex(void *data, unsigned char *output, size_t len) 115 { 116 int ret; 117 /* lock 1 = entropy_func_mutex() */ 118 Curl_polarsslthreadlock_lock_function(1); 119 ret = entropy_func(data, output, len); 120 Curl_polarsslthreadlock_unlock_function(1); 121 122 return ret; 123 } 124 /* end of entropy_func_mutex() */ 125 126 #endif /* THREADING_SUPPORT */ 127 128 /* Define this to enable lots of debugging for PolarSSL */ 129 #undef POLARSSL_DEBUG 130 131 #ifdef POLARSSL_DEBUG 132 static void polarssl_debug(void *context, int level, const char *line) 133 { 134 struct Curl_easy *data = NULL; 135 136 if(!context) 137 return; 138 139 data = (struct Curl_easy *)context; 140 141 infof(data, "%s", line); 142 (void) level; 143 } 144 #else 145 #endif 146 147 /* ALPN for http2? */ 148 #ifdef POLARSSL_SSL_ALPN 149 # define HAS_ALPN 150 #endif 151 152 static Curl_recv polarssl_recv; 153 static Curl_send polarssl_send; 154 155 static CURLcode polarssl_version_from_curl(int *polarver, long ssl_version) 156 { 157 switch(ssl_version) { 158 case CURL_SSLVERSION_TLSv1_0: 159 *polarver = SSL_MINOR_VERSION_1; 160 return CURLE_OK; 161 case CURL_SSLVERSION_TLSv1_1: 162 *polarver = SSL_MINOR_VERSION_2; 163 return CURLE_OK; 164 case CURL_SSLVERSION_TLSv1_2: 165 *polarver = SSL_MINOR_VERSION_3; 166 return CURLE_OK; 167 case CURL_SSLVERSION_TLSv1_3: 168 break; 169 } 170 return CURLE_SSL_CONNECT_ERROR; 171 } 172 173 static CURLcode 174 set_ssl_version_min_max(struct connectdata *conn, int sockindex) 175 { 176 struct Curl_easy *data = conn->data; 177 struct ssl_connect_data* connssl = &conn->ssl[sockindex]; 178 long ssl_version = SSL_CONN_CONFIG(version); 179 long ssl_version_max = SSL_CONN_CONFIG(version_max); 180 int ssl_min_ver = SSL_MINOR_VERSION_1; 181 int ssl_max_ver = SSL_MINOR_VERSION_1; 182 CURLcode result = CURLE_OK; 183 184 switch(ssl_version) { 185 case CURL_SSLVERSION_DEFAULT: 186 case CURL_SSLVERSION_TLSv1: 187 ssl_version = CURL_SSLVERSION_TLSv1_0; 188 break; 189 } 190 191 switch(ssl_version_max) { 192 case CURL_SSLVERSION_MAX_NONE: 193 case CURL_SSLVERSION_MAX_DEFAULT: 194 ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2; 195 break; 196 } 197 198 result = polarssl_version_from_curl(&ssl_min_ver, ssl_version); 199 if(result) { 200 failf(data, "unsupported min version passed via CURLOPT_SSLVERSION"); 201 return result; 202 } 203 result = polarssl_version_from_curl(&ssl_max_ver, ssl_version_max >> 16); 204 if(result) { 205 failf(data, "unsupported max version passed via CURLOPT_SSLVERSION"); 206 return result; 207 } 208 209 ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_min_ver); 210 ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_max_ver); 211 212 return result; 213 } 214 215 static CURLcode 216 polarssl_connect_step1(struct connectdata *conn, 217 int sockindex) 218 { 219 struct Curl_easy *data = conn->data; 220 struct ssl_connect_data* connssl = &conn->ssl[sockindex]; 221 const char *capath = SSL_CONN_CONFIG(CApath); 222 const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name : 223 conn->host.name; 224 const long int port = SSL_IS_PROXY() ? conn->port : conn->remote_port; 225 int ret = -1; 226 char errorbuf[128]; 227 errorbuf[0] = 0; 228 229 /* PolarSSL only supports SSLv3 and TLSv1 */ 230 if(SSL_CONN_CONFIG(version) == CURL_SSLVERSION_SSLv2) { 231 failf(data, "PolarSSL does not support SSLv2"); 232 return CURLE_SSL_CONNECT_ERROR; 233 } 234 235 #ifdef THREADING_SUPPORT 236 entropy_init_mutex(&entropy); 237 238 if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func_mutex, &entropy, 239 NULL, 0)) != 0) { 240 error_strerror(ret, errorbuf, sizeof(errorbuf)); 241 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n", 242 -ret, errorbuf); 243 } 244 #else 245 entropy_init(&BACKEND->entropy); 246 247 if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func, &BACKEND->entropy, 248 NULL, 0)) != 0) { 249 error_strerror(ret, errorbuf, sizeof(errorbuf)); 250 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n", 251 -ret, errorbuf); 252 } 253 #endif /* THREADING_SUPPORT */ 254 255 /* Load the trusted CA */ 256 memset(&BACKEND->cacert, 0, sizeof(x509_crt)); 257 258 if(SSL_CONN_CONFIG(CAfile)) { 259 ret = x509_crt_parse_file(&BACKEND->cacert, 260 SSL_CONN_CONFIG(CAfile)); 261 262 if(ret<0) { 263 error_strerror(ret, errorbuf, sizeof(errorbuf)); 264 failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s", 265 SSL_CONN_CONFIG(CAfile), -ret, errorbuf); 266 267 if(SSL_CONN_CONFIG(verifypeer)) 268 return CURLE_SSL_CACERT_BADFILE; 269 } 270 } 271 272 if(capath) { 273 ret = x509_crt_parse_path(&BACKEND->cacert, capath); 274 275 if(ret<0) { 276 error_strerror(ret, errorbuf, sizeof(errorbuf)); 277 failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s", 278 capath, -ret, errorbuf); 279 280 if(SSL_CONN_CONFIG(verifypeer)) 281 return CURLE_SSL_CACERT_BADFILE; 282 } 283 } 284 285 /* Load the client certificate */ 286 memset(&BACKEND->clicert, 0, sizeof(x509_crt)); 287 288 if(SSL_SET_OPTION(cert)) { 289 ret = x509_crt_parse_file(&BACKEND->clicert, 290 SSL_SET_OPTION(cert)); 291 292 if(ret) { 293 error_strerror(ret, errorbuf, sizeof(errorbuf)); 294 failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s", 295 SSL_SET_OPTION(cert), -ret, errorbuf); 296 297 return CURLE_SSL_CERTPROBLEM; 298 } 299 } 300 301 /* Load the client private key */ 302 if(SSL_SET_OPTION(key)) { 303 pk_context pk; 304 pk_init(&pk); 305 ret = pk_parse_keyfile(&pk, SSL_SET_OPTION(key), 306 SSL_SET_OPTION(key_passwd)); 307 if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA)) 308 ret = POLARSSL_ERR_PK_TYPE_MISMATCH; 309 if(ret == 0) 310 rsa_copy(&BACKEND->rsa, pk_rsa(pk)); 311 else 312 rsa_free(&BACKEND->rsa); 313 pk_free(&pk); 314 315 if(ret) { 316 error_strerror(ret, errorbuf, sizeof(errorbuf)); 317 failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s", 318 SSL_SET_OPTION(key), -ret, errorbuf); 319 320 return CURLE_SSL_CERTPROBLEM; 321 } 322 } 323 324 /* Load the CRL */ 325 memset(&BACKEND->crl, 0, sizeof(x509_crl)); 326 327 if(SSL_SET_OPTION(CRLfile)) { 328 ret = x509_crl_parse_file(&BACKEND->crl, 329 SSL_SET_OPTION(CRLfile)); 330 331 if(ret) { 332 error_strerror(ret, errorbuf, sizeof(errorbuf)); 333 failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s", 334 SSL_SET_OPTION(CRLfile), -ret, errorbuf); 335 336 return CURLE_SSL_CRL_BADFILE; 337 } 338 } 339 340 infof(data, "PolarSSL: Connecting to %s:%d\n", hostname, port); 341 342 if(ssl_init(&BACKEND->ssl)) { 343 failf(data, "PolarSSL: ssl_init failed"); 344 return CURLE_SSL_CONNECT_ERROR; 345 } 346 347 switch(SSL_CONN_CONFIG(version)) { 348 case CURL_SSLVERSION_DEFAULT: 349 case CURL_SSLVERSION_TLSv1: 350 ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, 351 SSL_MINOR_VERSION_1); 352 break; 353 case CURL_SSLVERSION_SSLv3: 354 ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, 355 SSL_MINOR_VERSION_0); 356 ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, 357 SSL_MINOR_VERSION_0); 358 infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n"); 359 break; 360 case CURL_SSLVERSION_TLSv1_0: 361 case CURL_SSLVERSION_TLSv1_1: 362 case CURL_SSLVERSION_TLSv1_2: 363 case CURL_SSLVERSION_TLSv1_3: 364 { 365 CURLcode result = set_ssl_version_min_max(conn, sockindex); 366 if(result != CURLE_OK) 367 return result; 368 break; 369 } 370 default: 371 failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION"); 372 return CURLE_SSL_CONNECT_ERROR; 373 } 374 375 ssl_set_endpoint(&BACKEND->ssl, SSL_IS_CLIENT); 376 ssl_set_authmode(&BACKEND->ssl, SSL_VERIFY_OPTIONAL); 377 378 ssl_set_rng(&BACKEND->ssl, ctr_drbg_random, 379 &BACKEND->ctr_drbg); 380 ssl_set_bio(&BACKEND->ssl, 381 net_recv, &conn->sock[sockindex], 382 net_send, &conn->sock[sockindex]); 383 384 ssl_set_ciphersuites(&BACKEND->ssl, ssl_list_ciphersuites()); 385 386 /* Check if there's a cached ID we can/should use here! */ 387 if(SSL_SET_OPTION(primary.sessionid)) { 388 void *old_session = NULL; 389 390 Curl_ssl_sessionid_lock(conn); 391 if(!Curl_ssl_getsessionid(conn, &old_session, NULL, sockindex)) { 392 ret = ssl_set_session(&BACKEND->ssl, old_session); 393 if(ret) { 394 Curl_ssl_sessionid_unlock(conn); 395 failf(data, "ssl_set_session returned -0x%x", -ret); 396 return CURLE_SSL_CONNECT_ERROR; 397 } 398 infof(data, "PolarSSL re-using session\n"); 399 } 400 Curl_ssl_sessionid_unlock(conn); 401 } 402 403 ssl_set_ca_chain(&BACKEND->ssl, 404 &BACKEND->cacert, 405 &BACKEND->crl, 406 hostname); 407 408 ssl_set_own_cert_rsa(&BACKEND->ssl, 409 &BACKEND->clicert, &BACKEND->rsa); 410 411 if(ssl_set_hostname(&BACKEND->ssl, hostname)) { 412 /* ssl_set_hostname() sets the name to use in CN/SAN checks *and* the name 413 to set in the SNI extension. So even if curl connects to a host 414 specified as an IP address, this function must be used. */ 415 failf(data, "couldn't set hostname in PolarSSL"); 416 return CURLE_SSL_CONNECT_ERROR; 417 } 418 419 #ifdef HAS_ALPN 420 if(conn->bits.tls_enable_alpn) { 421 static const char *protocols[3]; 422 int cur = 0; 423 424 #ifdef USE_NGHTTP2 425 if(data->set.httpversion >= CURL_HTTP_VERSION_2) { 426 protocols[cur++] = NGHTTP2_PROTO_VERSION_ID; 427 infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID); 428 } 429 #endif 430 431 protocols[cur++] = ALPN_HTTP_1_1; 432 infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1); 433 434 protocols[cur] = NULL; 435 436 ssl_set_alpn_protocols(&BACKEND->ssl, protocols); 437 } 438 #endif 439 440 #ifdef POLARSSL_DEBUG 441 ssl_set_dbg(&BACKEND->ssl, polarssl_debug, data); 442 #endif 443 444 connssl->connecting_state = ssl_connect_2; 445 446 return CURLE_OK; 447 } 448 449 static CURLcode 450 polarssl_connect_step2(struct connectdata *conn, 451 int sockindex) 452 { 453 int ret; 454 struct Curl_easy *data = conn->data; 455 struct ssl_connect_data* connssl = &conn->ssl[sockindex]; 456 char buffer[1024]; 457 const char * const pinnedpubkey = SSL_IS_PROXY() ? 458 data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] : 459 data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG]; 460 461 462 char errorbuf[128]; 463 errorbuf[0] = 0; 464 465 conn->recv[sockindex] = polarssl_recv; 466 conn->send[sockindex] = polarssl_send; 467 468 ret = ssl_handshake(&BACKEND->ssl); 469 470 switch(ret) { 471 case 0: 472 break; 473 474 case POLARSSL_ERR_NET_WANT_READ: 475 connssl->connecting_state = ssl_connect_2_reading; 476 return CURLE_OK; 477 478 case POLARSSL_ERR_NET_WANT_WRITE: 479 connssl->connecting_state = ssl_connect_2_writing; 480 return CURLE_OK; 481 482 default: 483 error_strerror(ret, errorbuf, sizeof(errorbuf)); 484 failf(data, "ssl_handshake returned - PolarSSL: (-0x%04X) %s", 485 -ret, errorbuf); 486 return CURLE_SSL_CONNECT_ERROR; 487 } 488 489 infof(data, "PolarSSL: Handshake complete, cipher is %s\n", 490 ssl_get_ciphersuite(&BACKEND->ssl) ); 491 492 ret = ssl_get_verify_result(&BACKEND->ssl); 493 494 if(ret && SSL_CONN_CONFIG(verifypeer)) { 495 if(ret & BADCERT_EXPIRED) 496 failf(data, "Cert verify failed: BADCERT_EXPIRED"); 497 498 if(ret & BADCERT_REVOKED) { 499 failf(data, "Cert verify failed: BADCERT_REVOKED"); 500 return CURLE_PEER_FAILED_VERIFICATION; 501 } 502 503 if(ret & BADCERT_CN_MISMATCH) 504 failf(data, "Cert verify failed: BADCERT_CN_MISMATCH"); 505 506 if(ret & BADCERT_NOT_TRUSTED) 507 failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED"); 508 509 return CURLE_PEER_FAILED_VERIFICATION; 510 } 511 512 if(ssl_get_peer_cert(&(BACKEND->ssl))) { 513 /* If the session was resumed, there will be no peer certs */ 514 memset(buffer, 0, sizeof(buffer)); 515 516 if(x509_crt_info(buffer, sizeof(buffer), (char *)"* ", 517 ssl_get_peer_cert(&(BACKEND->ssl))) != -1) 518 infof(data, "Dumping cert info:\n%s\n", buffer); 519 } 520 521 /* adapted from mbedtls.c */ 522 if(pinnedpubkey) { 523 int size; 524 CURLcode result; 525 x509_crt *p; 526 unsigned char pubkey[PUB_DER_MAX_BYTES]; 527 const x509_crt *peercert; 528 529 peercert = ssl_get_peer_cert(&BACKEND->ssl); 530 531 if(!peercert || !peercert->raw.p || !peercert->raw.len) { 532 failf(data, "Failed due to missing peer certificate"); 533 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 534 } 535 536 p = calloc(1, sizeof(*p)); 537 538 if(!p) 539 return CURLE_OUT_OF_MEMORY; 540 541 x509_crt_init(p); 542 543 /* Make a copy of our const peercert because pk_write_pubkey_der 544 needs a non-const key, for now. 545 https://github.com/ARMmbed/mbedtls/issues/396 */ 546 if(x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) { 547 failf(data, "Failed copying peer certificate"); 548 x509_crt_free(p); 549 free(p); 550 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 551 } 552 553 size = pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES); 554 555 if(size <= 0) { 556 failf(data, "Failed copying public key from peer certificate"); 557 x509_crt_free(p); 558 free(p); 559 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 560 } 561 562 /* pk_write_pubkey_der writes data at the end of the buffer. */ 563 result = Curl_pin_peer_pubkey(data, 564 pinnedpubkey, 565 &pubkey[PUB_DER_MAX_BYTES - size], size); 566 if(result) { 567 x509_crt_free(p); 568 free(p); 569 return result; 570 } 571 572 x509_crt_free(p); 573 free(p); 574 } 575 576 #ifdef HAS_ALPN 577 if(conn->bits.tls_enable_alpn) { 578 const char *next_protocol = ssl_get_alpn_protocol(&BACKEND->ssl); 579 580 if(next_protocol != NULL) { 581 infof(data, "ALPN, server accepted to use %s\n", next_protocol); 582 583 #ifdef USE_NGHTTP2 584 if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID, 585 NGHTTP2_PROTO_VERSION_ID_LEN)) { 586 conn->negnpn = CURL_HTTP_VERSION_2; 587 } 588 else 589 #endif 590 if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) { 591 conn->negnpn = CURL_HTTP_VERSION_1_1; 592 } 593 } 594 else 595 infof(data, "ALPN, server did not agree to a protocol\n"); 596 } 597 #endif 598 599 connssl->connecting_state = ssl_connect_3; 600 infof(data, "SSL connected\n"); 601 602 return CURLE_OK; 603 } 604 605 static CURLcode 606 polarssl_connect_step3(struct connectdata *conn, 607 int sockindex) 608 { 609 CURLcode retcode = CURLE_OK; 610 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 611 struct Curl_easy *data = conn->data; 612 613 DEBUGASSERT(ssl_connect_3 == connssl->connecting_state); 614 615 if(SSL_SET_OPTION(primary.sessionid)) { 616 int ret; 617 ssl_session *our_ssl_sessionid; 618 void *old_ssl_sessionid = NULL; 619 620 our_ssl_sessionid = calloc(1, sizeof(ssl_session)); 621 if(!our_ssl_sessionid) 622 return CURLE_OUT_OF_MEMORY; 623 624 ret = ssl_get_session(&BACKEND->ssl, our_ssl_sessionid); 625 if(ret) { 626 failf(data, "ssl_get_session returned -0x%x", -ret); 627 return CURLE_SSL_CONNECT_ERROR; 628 } 629 630 /* If there's already a matching session in the cache, delete it */ 631 Curl_ssl_sessionid_lock(conn); 632 if(!Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL, sockindex)) 633 Curl_ssl_delsessionid(conn, old_ssl_sessionid); 634 635 retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0, sockindex); 636 Curl_ssl_sessionid_unlock(conn); 637 if(retcode) { 638 free(our_ssl_sessionid); 639 failf(data, "failed to store ssl session"); 640 return retcode; 641 } 642 } 643 644 connssl->connecting_state = ssl_connect_done; 645 646 return CURLE_OK; 647 } 648 649 static ssize_t polarssl_send(struct connectdata *conn, 650 int sockindex, 651 const void *mem, 652 size_t len, 653 CURLcode *curlcode) 654 { 655 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 656 int ret = -1; 657 658 ret = ssl_write(&BACKEND->ssl, 659 (unsigned char *)mem, len); 660 661 if(ret < 0) { 662 *curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ? 663 CURLE_AGAIN : CURLE_SEND_ERROR; 664 ret = -1; 665 } 666 667 return ret; 668 } 669 670 static void Curl_polarssl_close(struct connectdata *conn, int sockindex) 671 { 672 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 673 rsa_free(&BACKEND->rsa); 674 x509_crt_free(&BACKEND->clicert); 675 x509_crt_free(&BACKEND->cacert); 676 x509_crl_free(&BACKEND->crl); 677 ssl_free(&BACKEND->ssl); 678 } 679 680 static ssize_t polarssl_recv(struct connectdata *conn, 681 int num, 682 char *buf, 683 size_t buffersize, 684 CURLcode *curlcode) 685 { 686 struct ssl_connect_data *connssl = &conn->ssl[num]; 687 int ret = -1; 688 ssize_t len = -1; 689 690 memset(buf, 0, buffersize); 691 ret = ssl_read(&BACKEND->ssl, (unsigned char *)buf, buffersize); 692 693 if(ret <= 0) { 694 if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY) 695 return 0; 696 697 *curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ? 698 CURLE_AGAIN : CURLE_RECV_ERROR; 699 return -1; 700 } 701 702 len = ret; 703 704 return len; 705 } 706 707 static void Curl_polarssl_session_free(void *ptr) 708 { 709 ssl_session_free(ptr); 710 free(ptr); 711 } 712 713 /* 1.3.10 was the first rebranded version. All new releases (in 1.3 branch and 714 higher) will be mbed TLS branded.. */ 715 716 static size_t Curl_polarssl_version(char *buffer, size_t size) 717 { 718 unsigned int version = version_get_number(); 719 return msnprintf(buffer, size, "%s/%d.%d.%d", 720 version >= 0x01030A00?"mbedTLS":"PolarSSL", 721 version>>24, (version>>16)&0xff, (version>>8)&0xff); 722 } 723 724 static CURLcode 725 polarssl_connect_common(struct connectdata *conn, 726 int sockindex, 727 bool nonblocking, 728 bool *done) 729 { 730 CURLcode result; 731 struct Curl_easy *data = conn->data; 732 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 733 curl_socket_t sockfd = conn->sock[sockindex]; 734 long timeout_ms; 735 int what; 736 737 /* check if the connection has already been established */ 738 if(ssl_connection_complete == connssl->state) { 739 *done = TRUE; 740 return CURLE_OK; 741 } 742 743 if(ssl_connect_1 == connssl->connecting_state) { 744 /* Find out how much more time we're allowed */ 745 timeout_ms = Curl_timeleft(data, NULL, TRUE); 746 747 if(timeout_ms < 0) { 748 /* no need to continue if time already is up */ 749 failf(data, "SSL connection timeout"); 750 return CURLE_OPERATION_TIMEDOUT; 751 } 752 753 result = polarssl_connect_step1(conn, sockindex); 754 if(result) 755 return result; 756 } 757 758 while(ssl_connect_2 == connssl->connecting_state || 759 ssl_connect_2_reading == connssl->connecting_state || 760 ssl_connect_2_writing == connssl->connecting_state) { 761 762 /* check allowed time left */ 763 timeout_ms = Curl_timeleft(data, NULL, TRUE); 764 765 if(timeout_ms < 0) { 766 /* no need to continue if time already is up */ 767 failf(data, "SSL connection timeout"); 768 return CURLE_OPERATION_TIMEDOUT; 769 } 770 771 /* if ssl is expecting something, check if it's available. */ 772 if(connssl->connecting_state == ssl_connect_2_reading || 773 connssl->connecting_state == ssl_connect_2_writing) { 774 775 curl_socket_t writefd = ssl_connect_2_writing == 776 connssl->connecting_state?sockfd:CURL_SOCKET_BAD; 777 curl_socket_t readfd = ssl_connect_2_reading == 778 connssl->connecting_state?sockfd:CURL_SOCKET_BAD; 779 780 what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd, 781 nonblocking?0:timeout_ms); 782 if(what < 0) { 783 /* fatal error */ 784 failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO); 785 return CURLE_SSL_CONNECT_ERROR; 786 } 787 else if(0 == what) { 788 if(nonblocking) { 789 *done = FALSE; 790 return CURLE_OK; 791 } 792 else { 793 /* timeout */ 794 failf(data, "SSL connection timeout"); 795 return CURLE_OPERATION_TIMEDOUT; 796 } 797 } 798 /* socket is readable or writable */ 799 } 800 801 /* Run transaction, and return to the caller if it failed or if 802 * this connection is part of a multi handle and this loop would 803 * execute again. This permits the owner of a multi handle to 804 * abort a connection attempt before step2 has completed while 805 * ensuring that a client using select() or epoll() will always 806 * have a valid fdset to wait on. 807 */ 808 result = polarssl_connect_step2(conn, sockindex); 809 if(result || (nonblocking && 810 (ssl_connect_2 == connssl->connecting_state || 811 ssl_connect_2_reading == connssl->connecting_state || 812 ssl_connect_2_writing == connssl->connecting_state))) 813 return result; 814 815 } /* repeat step2 until all transactions are done. */ 816 817 if(ssl_connect_3 == connssl->connecting_state) { 818 result = polarssl_connect_step3(conn, sockindex); 819 if(result) 820 return result; 821 } 822 823 if(ssl_connect_done == connssl->connecting_state) { 824 connssl->state = ssl_connection_complete; 825 conn->recv[sockindex] = polarssl_recv; 826 conn->send[sockindex] = polarssl_send; 827 *done = TRUE; 828 } 829 else 830 *done = FALSE; 831 832 /* Reset our connect state machine */ 833 connssl->connecting_state = ssl_connect_1; 834 835 return CURLE_OK; 836 } 837 838 static CURLcode Curl_polarssl_connect_nonblocking(struct connectdata *conn, 839 int sockindex, bool *done) 840 { 841 return polarssl_connect_common(conn, sockindex, TRUE, done); 842 } 843 844 845 static CURLcode Curl_polarssl_connect(struct connectdata *conn, int sockindex) 846 { 847 CURLcode result; 848 bool done = FALSE; 849 850 result = polarssl_connect_common(conn, sockindex, FALSE, &done); 851 if(result) 852 return result; 853 854 DEBUGASSERT(done); 855 856 return CURLE_OK; 857 } 858 859 /* 860 * return 0 error initializing SSL 861 * return 1 SSL initialized successfully 862 */ 863 static int Curl_polarssl_init(void) 864 { 865 return Curl_polarsslthreadlock_thread_setup(); 866 } 867 868 static void Curl_polarssl_cleanup(void) 869 { 870 (void)Curl_polarsslthreadlock_thread_cleanup(); 871 } 872 873 static bool Curl_polarssl_data_pending(const struct connectdata *conn, 874 int sockindex) 875 { 876 const struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 877 return ssl_get_bytes_avail(&BACKEND->ssl) != 0; 878 } 879 880 static CURLcode Curl_polarssl_sha256sum(const unsigned char *input, 881 size_t inputlen, 882 unsigned char *sha256sum, 883 size_t sha256len UNUSED_PARAM) 884 { 885 (void)sha256len; 886 sha256(input, inputlen, sha256sum, 0); 887 return CURLE_OK; 888 } 889 890 static void *Curl_polarssl_get_internals(struct ssl_connect_data *connssl, 891 CURLINFO info UNUSED_PARAM) 892 { 893 (void)info; 894 return &BACKEND->ssl; 895 } 896 897 const struct Curl_ssl Curl_ssl_polarssl = { 898 { CURLSSLBACKEND_POLARSSL, "polarssl" }, /* info */ 899 900 SSLSUPP_CA_PATH | 901 SSLSUPP_PINNEDPUBKEY, 902 903 sizeof(struct ssl_backend_data), 904 905 Curl_polarssl_init, /* init */ 906 Curl_polarssl_cleanup, /* cleanup */ 907 Curl_polarssl_version, /* version */ 908 Curl_none_check_cxn, /* check_cxn */ 909 Curl_none_shutdown, /* shutdown */ 910 Curl_polarssl_data_pending, /* data_pending */ 911 /* This might cause libcurl to use a weeker random! 912 * TODO: use Polarssl's CTR-DRBG or HMAC-DRBG 913 */ 914 Curl_none_random, /* random */ 915 Curl_none_cert_status_request, /* cert_status_request */ 916 Curl_polarssl_connect, /* connect */ 917 Curl_polarssl_connect_nonblocking, /* connect_nonblocking */ 918 Curl_polarssl_get_internals, /* get_internals */ 919 Curl_polarssl_close, /* close_one */ 920 Curl_none_close_all, /* close_all */ 921 Curl_polarssl_session_free, /* session_free */ 922 Curl_none_set_engine, /* set_engine */ 923 Curl_none_set_engine_default, /* set_engine_default */ 924 Curl_none_engines_list, /* engines_list */ 925 Curl_none_false_start, /* false_start */ 926 Curl_none_md5sum, /* md5sum */ 927 Curl_polarssl_sha256sum /* sha256sum */ 928 }; 929 930 #endif /* USE_POLARSSL */ 931
