1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 2012 - 2016, 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 34 #include <polarssl/net.h> 35 #include <polarssl/ssl.h> 36 #include <polarssl/certs.h> 37 #include <polarssl/x509.h> 38 #include <polarssl/version.h> 39 #include <polarssl/sha256.h> 40 41 #if POLARSSL_VERSION_NUMBER < 0x01030000 42 #error too old PolarSSL 43 #endif 44 45 #include <polarssl/error.h> 46 #include <polarssl/entropy.h> 47 #include <polarssl/ctr_drbg.h> 48 49 #include "urldata.h" 50 #include "sendf.h" 51 #include "inet_pton.h" 52 #include "polarssl.h" 53 #include "vtls.h" 54 #include "parsedate.h" 55 #include "connect.h" /* for the connect timeout */ 56 #include "select.h" 57 #include "rawstr.h" 58 #include "polarssl_threadlock.h" 59 #include "curl_printf.h" 60 #include "curl_memory.h" 61 /* The last #include file should be: */ 62 #include "memdebug.h" 63 64 /* See https://tls.mbed.org/discussions/generic/ 65 howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der 66 */ 67 #define RSA_PUB_DER_MAX_BYTES (38 + 2 * POLARSSL_MPI_MAX_SIZE) 68 #define ECP_PUB_DER_MAX_BYTES (30 + 2 * POLARSSL_ECP_MAX_BYTES) 69 70 #define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \ 71 RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES) 72 73 /* apply threading? */ 74 #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32) 75 #define THREADING_SUPPORT 76 #endif 77 78 #if defined(THREADING_SUPPORT) 79 static entropy_context entropy; 80 81 static int entropy_init_initialized = 0; 82 83 /* start of entropy_init_mutex() */ 84 static void entropy_init_mutex(entropy_context *ctx) 85 { 86 /* lock 0 = entropy_init_mutex() */ 87 Curl_polarsslthreadlock_lock_function(0); 88 if(entropy_init_initialized == 0) { 89 entropy_init(ctx); 90 entropy_init_initialized = 1; 91 } 92 Curl_polarsslthreadlock_unlock_function(0); 93 } 94 /* end of entropy_init_mutex() */ 95 96 /* start of entropy_func_mutex() */ 97 static int entropy_func_mutex(void *data, unsigned char *output, size_t len) 98 { 99 int ret; 100 /* lock 1 = entropy_func_mutex() */ 101 Curl_polarsslthreadlock_lock_function(1); 102 ret = entropy_func(data, output, len); 103 Curl_polarsslthreadlock_unlock_function(1); 104 105 return ret; 106 } 107 /* end of entropy_func_mutex() */ 108 109 #endif /* THREADING_SUPPORT */ 110 111 /* Define this to enable lots of debugging for PolarSSL */ 112 #undef POLARSSL_DEBUG 113 114 #ifdef POLARSSL_DEBUG 115 static void polarssl_debug(void *context, int level, const char *line) 116 { 117 struct Curl_easy *data = NULL; 118 119 if(!context) 120 return; 121 122 data = (struct Curl_easy *)context; 123 124 infof(data, "%s", line); 125 (void) level; 126 } 127 #else 128 #endif 129 130 /* ALPN for http2? */ 131 #ifdef POLARSSL_SSL_ALPN 132 # define HAS_ALPN 133 #endif 134 135 static Curl_recv polarssl_recv; 136 static Curl_send polarssl_send; 137 138 139 static CURLcode 140 polarssl_connect_step1(struct connectdata *conn, 141 int sockindex) 142 { 143 struct Curl_easy *data = conn->data; 144 struct ssl_connect_data* connssl = &conn->ssl[sockindex]; 145 146 bool sni = TRUE; /* default is SNI enabled */ 147 int ret = -1; 148 #ifdef ENABLE_IPV6 149 struct in6_addr addr; 150 #else 151 struct in_addr addr; 152 #endif 153 char errorbuf[128]; 154 errorbuf[0]=0; 155 156 /* PolarSSL only supports SSLv3 and TLSv1 */ 157 if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) { 158 failf(data, "PolarSSL does not support SSLv2"); 159 return CURLE_SSL_CONNECT_ERROR; 160 } 161 else if(data->set.ssl.version == CURL_SSLVERSION_SSLv3) 162 sni = FALSE; /* SSLv3 has no SNI */ 163 164 #ifdef THREADING_SUPPORT 165 entropy_init_mutex(&entropy); 166 167 if((ret = ctr_drbg_init(&connssl->ctr_drbg, entropy_func_mutex, &entropy, 168 NULL, 0)) != 0) { 169 #ifdef POLARSSL_ERROR_C 170 error_strerror(ret, errorbuf, sizeof(errorbuf)); 171 #endif /* POLARSSL_ERROR_C */ 172 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n", 173 -ret, errorbuf); 174 } 175 #else 176 entropy_init(&connssl->entropy); 177 178 if((ret = ctr_drbg_init(&connssl->ctr_drbg, entropy_func, &connssl->entropy, 179 NULL, 0)) != 0) { 180 #ifdef POLARSSL_ERROR_C 181 error_strerror(ret, errorbuf, sizeof(errorbuf)); 182 #endif /* POLARSSL_ERROR_C */ 183 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n", 184 -ret, errorbuf); 185 } 186 #endif /* THREADING_SUPPORT */ 187 188 /* Load the trusted CA */ 189 memset(&connssl->cacert, 0, sizeof(x509_crt)); 190 191 if(data->set.str[STRING_SSL_CAFILE]) { 192 ret = x509_crt_parse_file(&connssl->cacert, 193 data->set.str[STRING_SSL_CAFILE]); 194 195 if(ret<0) { 196 #ifdef POLARSSL_ERROR_C 197 error_strerror(ret, errorbuf, sizeof(errorbuf)); 198 #endif /* POLARSSL_ERROR_C */ 199 failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s", 200 data->set.str[STRING_SSL_CAFILE], -ret, errorbuf); 201 202 if(data->set.ssl.verifypeer) 203 return CURLE_SSL_CACERT_BADFILE; 204 } 205 } 206 207 if(data->set.str[STRING_SSL_CAPATH]) { 208 ret = x509_crt_parse_path(&connssl->cacert, 209 data->set.str[STRING_SSL_CAPATH]); 210 211 if(ret<0) { 212 #ifdef POLARSSL_ERROR_C 213 error_strerror(ret, errorbuf, sizeof(errorbuf)); 214 #endif /* POLARSSL_ERROR_C */ 215 failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s", 216 data->set.str[STRING_SSL_CAPATH], -ret, errorbuf); 217 218 if(data->set.ssl.verifypeer) 219 return CURLE_SSL_CACERT_BADFILE; 220 } 221 } 222 223 /* Load the client certificate */ 224 memset(&connssl->clicert, 0, sizeof(x509_crt)); 225 226 if(data->set.str[STRING_CERT]) { 227 ret = x509_crt_parse_file(&connssl->clicert, 228 data->set.str[STRING_CERT]); 229 230 if(ret) { 231 #ifdef POLARSSL_ERROR_C 232 error_strerror(ret, errorbuf, sizeof(errorbuf)); 233 #endif /* POLARSSL_ERROR_C */ 234 failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s", 235 data->set.str[STRING_CERT], -ret, errorbuf); 236 237 return CURLE_SSL_CERTPROBLEM; 238 } 239 } 240 241 /* Load the client private key */ 242 if(data->set.str[STRING_KEY]) { 243 pk_context pk; 244 pk_init(&pk); 245 ret = pk_parse_keyfile(&pk, data->set.str[STRING_KEY], 246 data->set.str[STRING_KEY_PASSWD]); 247 if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA)) 248 ret = POLARSSL_ERR_PK_TYPE_MISMATCH; 249 if(ret == 0) 250 rsa_copy(&connssl->rsa, pk_rsa(pk)); 251 else 252 rsa_free(&connssl->rsa); 253 pk_free(&pk); 254 255 if(ret) { 256 #ifdef POLARSSL_ERROR_C 257 error_strerror(ret, errorbuf, sizeof(errorbuf)); 258 #endif /* POLARSSL_ERROR_C */ 259 failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s", 260 data->set.str[STRING_KEY], -ret, errorbuf); 261 262 return CURLE_SSL_CERTPROBLEM; 263 } 264 } 265 266 /* Load the CRL */ 267 memset(&connssl->crl, 0, sizeof(x509_crl)); 268 269 if(data->set.str[STRING_SSL_CRLFILE]) { 270 ret = x509_crl_parse_file(&connssl->crl, 271 data->set.str[STRING_SSL_CRLFILE]); 272 273 if(ret) { 274 #ifdef POLARSSL_ERROR_C 275 error_strerror(ret, errorbuf, sizeof(errorbuf)); 276 #endif /* POLARSSL_ERROR_C */ 277 failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s", 278 data->set.str[STRING_SSL_CRLFILE], -ret, errorbuf); 279 280 return CURLE_SSL_CRL_BADFILE; 281 } 282 } 283 284 infof(data, "PolarSSL: Connecting to %s:%d\n", 285 conn->host.name, conn->remote_port); 286 287 if(ssl_init(&connssl->ssl)) { 288 failf(data, "PolarSSL: ssl_init failed"); 289 return CURLE_SSL_CONNECT_ERROR; 290 } 291 292 switch(data->set.ssl.version) { 293 default: 294 case CURL_SSLVERSION_DEFAULT: 295 case CURL_SSLVERSION_TLSv1: 296 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 297 SSL_MINOR_VERSION_1); 298 break; 299 case CURL_SSLVERSION_SSLv3: 300 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 301 SSL_MINOR_VERSION_0); 302 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 303 SSL_MINOR_VERSION_0); 304 infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n"); 305 break; 306 case CURL_SSLVERSION_TLSv1_0: 307 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 308 SSL_MINOR_VERSION_1); 309 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 310 SSL_MINOR_VERSION_1); 311 infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.0\n"); 312 break; 313 case CURL_SSLVERSION_TLSv1_1: 314 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 315 SSL_MINOR_VERSION_2); 316 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 317 SSL_MINOR_VERSION_2); 318 infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.1\n"); 319 break; 320 case CURL_SSLVERSION_TLSv1_2: 321 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 322 SSL_MINOR_VERSION_3); 323 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3, 324 SSL_MINOR_VERSION_3); 325 infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.2\n"); 326 break; 327 } 328 329 ssl_set_endpoint(&connssl->ssl, SSL_IS_CLIENT); 330 ssl_set_authmode(&connssl->ssl, SSL_VERIFY_OPTIONAL); 331 332 ssl_set_rng(&connssl->ssl, ctr_drbg_random, 333 &connssl->ctr_drbg); 334 ssl_set_bio(&connssl->ssl, 335 net_recv, &conn->sock[sockindex], 336 net_send, &conn->sock[sockindex]); 337 338 ssl_set_ciphersuites(&connssl->ssl, ssl_list_ciphersuites()); 339 340 /* Check if there's a cached ID we can/should use here! */ 341 if(conn->ssl_config.sessionid) { 342 void *old_session = NULL; 343 344 Curl_ssl_sessionid_lock(conn); 345 if(!Curl_ssl_getsessionid(conn, &old_session, NULL)) { 346 ret = ssl_set_session(&connssl->ssl, old_session); 347 Curl_ssl_sessionid_unlock(conn); 348 if(ret) { 349 failf(data, "ssl_set_session returned -0x%x", -ret); 350 return CURLE_SSL_CONNECT_ERROR; 351 } 352 infof(data, "PolarSSL re-using session\n"); 353 } 354 } 355 356 ssl_set_ca_chain(&connssl->ssl, 357 &connssl->cacert, 358 &connssl->crl, 359 conn->host.name); 360 361 ssl_set_own_cert_rsa(&connssl->ssl, 362 &connssl->clicert, &connssl->rsa); 363 364 if(ssl_set_hostname(&connssl->ssl, conn->host.name)) { 365 /* ssl_set_hostname() sets the name to use in CN/SAN checks *and* the name 366 to set in the SNI extension. So even if curl connects to a host 367 specified as an IP address, this function must be used. */ 368 failf(data, "couldn't set hostname in PolarSSL"); 369 return CURLE_SSL_CONNECT_ERROR; 370 } 371 372 #ifdef HAS_ALPN 373 if(conn->bits.tls_enable_alpn) { 374 static const char* protocols[3]; 375 int cur = 0; 376 377 #ifdef USE_NGHTTP2 378 if(data->set.httpversion >= CURL_HTTP_VERSION_2) { 379 protocols[cur++] = NGHTTP2_PROTO_VERSION_ID; 380 infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID); 381 } 382 #endif 383 384 protocols[cur++] = ALPN_HTTP_1_1; 385 infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1); 386 387 protocols[cur] = NULL; 388 389 ssl_set_alpn_protocols(&connssl->ssl, protocols); 390 } 391 #endif 392 393 #ifdef POLARSSL_DEBUG 394 ssl_set_dbg(&connssl->ssl, polarssl_debug, data); 395 #endif 396 397 connssl->connecting_state = ssl_connect_2; 398 399 return CURLE_OK; 400 } 401 402 static CURLcode 403 polarssl_connect_step2(struct connectdata *conn, 404 int sockindex) 405 { 406 int ret; 407 struct Curl_easy *data = conn->data; 408 struct ssl_connect_data* connssl = &conn->ssl[sockindex]; 409 char buffer[1024]; 410 411 char errorbuf[128]; 412 errorbuf[0] = 0; 413 414 conn->recv[sockindex] = polarssl_recv; 415 conn->send[sockindex] = polarssl_send; 416 417 ret = ssl_handshake(&connssl->ssl); 418 419 switch(ret) { 420 case 0: 421 break; 422 423 case POLARSSL_ERR_NET_WANT_READ: 424 connssl->connecting_state = ssl_connect_2_reading; 425 return CURLE_OK; 426 427 case POLARSSL_ERR_NET_WANT_WRITE: 428 connssl->connecting_state = ssl_connect_2_writing; 429 return CURLE_OK; 430 431 default: 432 #ifdef POLARSSL_ERROR_C 433 error_strerror(ret, errorbuf, sizeof(errorbuf)); 434 #endif /* POLARSSL_ERROR_C */ 435 failf(data, "ssl_handshake returned - PolarSSL: (-0x%04X) %s", 436 -ret, errorbuf); 437 return CURLE_SSL_CONNECT_ERROR; 438 } 439 440 infof(data, "PolarSSL: Handshake complete, cipher is %s\n", 441 ssl_get_ciphersuite(&conn->ssl[sockindex].ssl) ); 442 443 ret = ssl_get_verify_result(&conn->ssl[sockindex].ssl); 444 445 if(ret && data->set.ssl.verifypeer) { 446 if(ret & BADCERT_EXPIRED) 447 failf(data, "Cert verify failed: BADCERT_EXPIRED"); 448 449 if(ret & BADCERT_REVOKED) { 450 failf(data, "Cert verify failed: BADCERT_REVOKED"); 451 return CURLE_SSL_CACERT; 452 } 453 454 if(ret & BADCERT_CN_MISMATCH) 455 failf(data, "Cert verify failed: BADCERT_CN_MISMATCH"); 456 457 if(ret & BADCERT_NOT_TRUSTED) 458 failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED"); 459 460 return CURLE_PEER_FAILED_VERIFICATION; 461 } 462 463 if(ssl_get_peer_cert(&(connssl->ssl))) { 464 /* If the session was resumed, there will be no peer certs */ 465 memset(buffer, 0, sizeof(buffer)); 466 467 if(x509_crt_info(buffer, sizeof(buffer), (char *)"* ", 468 ssl_get_peer_cert(&(connssl->ssl))) != -1) 469 infof(data, "Dumping cert info:\n%s\n", buffer); 470 } 471 472 /* adapted from mbedtls.c */ 473 if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) { 474 int size; 475 CURLcode result; 476 x509_crt *p; 477 unsigned char pubkey[PUB_DER_MAX_BYTES]; 478 const x509_crt *peercert; 479 480 peercert = ssl_get_peer_cert(&connssl->ssl); 481 482 if(!peercert || !peercert->raw.p || !peercert->raw.len) { 483 failf(data, "Failed due to missing peer certificate"); 484 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 485 } 486 487 p = calloc(1, sizeof(*p)); 488 489 if(!p) 490 return CURLE_OUT_OF_MEMORY; 491 492 x509_crt_init(p); 493 494 /* Make a copy of our const peercert because pk_write_pubkey_der 495 needs a non-const key, for now. 496 https://github.com/ARMmbed/mbedtls/issues/396 */ 497 if(x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) { 498 failf(data, "Failed copying peer certificate"); 499 x509_crt_free(p); 500 free(p); 501 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 502 } 503 504 size = pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES); 505 506 if(size <= 0) { 507 failf(data, "Failed copying public key from peer certificate"); 508 x509_crt_free(p); 509 free(p); 510 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 511 } 512 513 /* pk_write_pubkey_der writes data at the end of the buffer. */ 514 result = Curl_pin_peer_pubkey(data, 515 data->set.str[STRING_SSL_PINNEDPUBLICKEY], 516 &pubkey[PUB_DER_MAX_BYTES - size], size); 517 if(result) { 518 x509_crt_free(p); 519 free(p); 520 return result; 521 } 522 523 x509_crt_free(p); 524 free(p); 525 } 526 527 #ifdef HAS_ALPN 528 if(conn->bits.tls_enable_alpn) { 529 const char *next_protocol = ssl_get_alpn_protocol(&connssl->ssl); 530 531 if(next_protocol != NULL) { 532 infof(data, "ALPN, server accepted to use %s\n", next_protocol); 533 534 #ifdef USE_NGHTTP2 535 if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID, 536 NGHTTP2_PROTO_VERSION_ID_LEN)) { 537 conn->negnpn = CURL_HTTP_VERSION_2; 538 } 539 else 540 #endif 541 if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) { 542 conn->negnpn = CURL_HTTP_VERSION_1_1; 543 } 544 } 545 else 546 infof(data, "ALPN, server did not agree to a protocol\n"); 547 } 548 #endif 549 550 connssl->connecting_state = ssl_connect_3; 551 infof(data, "SSL connected\n"); 552 553 return CURLE_OK; 554 } 555 556 static CURLcode 557 polarssl_connect_step3(struct connectdata *conn, 558 int sockindex) 559 { 560 CURLcode retcode = CURLE_OK; 561 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 562 struct Curl_easy *data = conn->data; 563 564 DEBUGASSERT(ssl_connect_3 == connssl->connecting_state); 565 566 if(conn->ssl_config.sessionid) { 567 int ret; 568 ssl_session *our_ssl_sessionid; 569 void *old_ssl_sessionid = NULL; 570 571 our_ssl_sessionid = malloc(sizeof(ssl_session)); 572 if(!our_ssl_sessionid) 573 return CURLE_OUT_OF_MEMORY; 574 575 ssl_session_init(our_ssl_sessionid); 576 577 ret = ssl_get_session(&connssl->ssl, our_ssl_sessionid); 578 if(ret) { 579 failf(data, "ssl_get_session returned -0x%x", -ret); 580 return CURLE_SSL_CONNECT_ERROR; 581 } 582 583 /* If there's already a matching session in the cache, delete it */ 584 Curl_ssl_sessionid_lock(conn); 585 if(!Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL)) 586 Curl_ssl_delsessionid(conn, old_ssl_sessionid); 587 588 retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0); 589 Curl_ssl_sessionid_unlock(conn); 590 if(retcode) { 591 free(our_ssl_sessionid); 592 failf(data, "failed to store ssl session"); 593 return retcode; 594 } 595 } 596 597 connssl->connecting_state = ssl_connect_done; 598 599 return CURLE_OK; 600 } 601 602 static ssize_t polarssl_send(struct connectdata *conn, 603 int sockindex, 604 const void *mem, 605 size_t len, 606 CURLcode *curlcode) 607 { 608 int ret = -1; 609 610 ret = ssl_write(&conn->ssl[sockindex].ssl, 611 (unsigned char *)mem, len); 612 613 if(ret < 0) { 614 *curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ? 615 CURLE_AGAIN : CURLE_SEND_ERROR; 616 ret = -1; 617 } 618 619 return ret; 620 } 621 622 void Curl_polarssl_close(struct connectdata *conn, int sockindex) 623 { 624 rsa_free(&conn->ssl[sockindex].rsa); 625 x509_crt_free(&conn->ssl[sockindex].clicert); 626 x509_crt_free(&conn->ssl[sockindex].cacert); 627 x509_crl_free(&conn->ssl[sockindex].crl); 628 ssl_free(&conn->ssl[sockindex].ssl); 629 } 630 631 static ssize_t polarssl_recv(struct connectdata *conn, 632 int num, 633 char *buf, 634 size_t buffersize, 635 CURLcode *curlcode) 636 { 637 int ret = -1; 638 ssize_t len = -1; 639 640 memset(buf, 0, buffersize); 641 ret = ssl_read(&conn->ssl[num].ssl, (unsigned char *)buf, buffersize); 642 643 if(ret <= 0) { 644 if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY) 645 return 0; 646 647 *curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ? 648 CURLE_AGAIN : CURLE_RECV_ERROR; 649 return -1; 650 } 651 652 len = ret; 653 654 return len; 655 } 656 657 void Curl_polarssl_session_free(void *ptr) 658 { 659 ssl_session_free(ptr); 660 free(ptr); 661 } 662 663 /* 1.3.10 was the first rebranded version. All new releases (in 1.3 branch and 664 higher) will be mbed TLS branded.. */ 665 666 size_t Curl_polarssl_version(char *buffer, size_t size) 667 { 668 unsigned int version = version_get_number(); 669 return snprintf(buffer, size, "%s/%d.%d.%d", 670 version >= 0x01030A00?"mbedTLS":"PolarSSL", 671 version>>24, (version>>16)&0xff, (version>>8)&0xff); 672 } 673 674 static CURLcode 675 polarssl_connect_common(struct connectdata *conn, 676 int sockindex, 677 bool nonblocking, 678 bool *done) 679 { 680 CURLcode result; 681 struct Curl_easy *data = conn->data; 682 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 683 curl_socket_t sockfd = conn->sock[sockindex]; 684 long timeout_ms; 685 int what; 686 687 /* check if the connection has already been established */ 688 if(ssl_connection_complete == connssl->state) { 689 *done = TRUE; 690 return CURLE_OK; 691 } 692 693 if(ssl_connect_1 == connssl->connecting_state) { 694 /* Find out how much more time we're allowed */ 695 timeout_ms = Curl_timeleft(data, NULL, TRUE); 696 697 if(timeout_ms < 0) { 698 /* no need to continue if time already is up */ 699 failf(data, "SSL connection timeout"); 700 return CURLE_OPERATION_TIMEDOUT; 701 } 702 703 result = polarssl_connect_step1(conn, sockindex); 704 if(result) 705 return result; 706 } 707 708 while(ssl_connect_2 == connssl->connecting_state || 709 ssl_connect_2_reading == connssl->connecting_state || 710 ssl_connect_2_writing == connssl->connecting_state) { 711 712 /* check allowed time left */ 713 timeout_ms = Curl_timeleft(data, NULL, TRUE); 714 715 if(timeout_ms < 0) { 716 /* no need to continue if time already is up */ 717 failf(data, "SSL connection timeout"); 718 return CURLE_OPERATION_TIMEDOUT; 719 } 720 721 /* if ssl is expecting something, check if it's available. */ 722 if(connssl->connecting_state == ssl_connect_2_reading || 723 connssl->connecting_state == ssl_connect_2_writing) { 724 725 curl_socket_t writefd = ssl_connect_2_writing== 726 connssl->connecting_state?sockfd:CURL_SOCKET_BAD; 727 curl_socket_t readfd = ssl_connect_2_reading== 728 connssl->connecting_state?sockfd:CURL_SOCKET_BAD; 729 730 what = Curl_socket_ready(readfd, writefd, nonblocking?0:timeout_ms); 731 if(what < 0) { 732 /* fatal error */ 733 failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO); 734 return CURLE_SSL_CONNECT_ERROR; 735 } 736 else if(0 == what) { 737 if(nonblocking) { 738 *done = FALSE; 739 return CURLE_OK; 740 } 741 else { 742 /* timeout */ 743 failf(data, "SSL connection timeout"); 744 return CURLE_OPERATION_TIMEDOUT; 745 } 746 } 747 /* socket is readable or writable */ 748 } 749 750 /* Run transaction, and return to the caller if it failed or if 751 * this connection is part of a multi handle and this loop would 752 * execute again. This permits the owner of a multi handle to 753 * abort a connection attempt before step2 has completed while 754 * ensuring that a client using select() or epoll() will always 755 * have a valid fdset to wait on. 756 */ 757 result = polarssl_connect_step2(conn, sockindex); 758 if(result || (nonblocking && 759 (ssl_connect_2 == connssl->connecting_state || 760 ssl_connect_2_reading == connssl->connecting_state || 761 ssl_connect_2_writing == connssl->connecting_state))) 762 return result; 763 764 } /* repeat step2 until all transactions are done. */ 765 766 if(ssl_connect_3 == connssl->connecting_state) { 767 result = polarssl_connect_step3(conn, sockindex); 768 if(result) 769 return result; 770 } 771 772 if(ssl_connect_done == connssl->connecting_state) { 773 connssl->state = ssl_connection_complete; 774 conn->recv[sockindex] = polarssl_recv; 775 conn->send[sockindex] = polarssl_send; 776 *done = TRUE; 777 } 778 else 779 *done = FALSE; 780 781 /* Reset our connect state machine */ 782 connssl->connecting_state = ssl_connect_1; 783 784 return CURLE_OK; 785 } 786 787 CURLcode 788 Curl_polarssl_connect_nonblocking(struct connectdata *conn, 789 int sockindex, 790 bool *done) 791 { 792 return polarssl_connect_common(conn, sockindex, TRUE, done); 793 } 794 795 796 CURLcode 797 Curl_polarssl_connect(struct connectdata *conn, 798 int sockindex) 799 { 800 CURLcode result; 801 bool done = FALSE; 802 803 result = polarssl_connect_common(conn, sockindex, FALSE, &done); 804 if(result) 805 return result; 806 807 DEBUGASSERT(done); 808 809 return CURLE_OK; 810 } 811 812 /* 813 * return 0 error initializing SSL 814 * return 1 SSL initialized successfully 815 */ 816 int Curl_polarssl_init(void) 817 { 818 return Curl_polarsslthreadlock_thread_setup(); 819 } 820 821 void Curl_polarssl_cleanup(void) 822 { 823 (void)Curl_polarsslthreadlock_thread_cleanup(); 824 } 825 826 #endif /* USE_POLARSSL */ 827
