1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 23 /* 24 * Source file for all CyaSSL-specific code for the TLS/SSL layer. No code 25 * but vtls.c should ever call or use these functions. 26 * 27 */ 28 29 #include "curl_setup.h" 30 31 #ifdef USE_CYASSL 32 33 #define WOLFSSL_OPTIONS_IGNORE_SYS 34 /* CyaSSL's version.h, which should contain only the version, should come 35 before all other CyaSSL includes and be immediately followed by build config 36 aka options.h. https://curl.haxx.se/mail/lib-2015-04/0069.html */ 37 #include <cyassl/version.h> 38 #if defined(HAVE_CYASSL_OPTIONS_H) && (LIBCYASSL_VERSION_HEX > 0x03004008) 39 #if defined(CYASSL_API) || defined(WOLFSSL_API) 40 /* Safety measure. If either is defined some API include was already included 41 and that's a problem since options.h hasn't been included yet. */ 42 #error "CyaSSL API was included before the CyaSSL build options." 43 #endif 44 #include <cyassl/options.h> 45 #endif 46 47 #ifdef HAVE_LIMITS_H 48 #include <limits.h> 49 #endif 50 51 #include "urldata.h" 52 #include "sendf.h" 53 #include "inet_pton.h" 54 #include "vtls.h" 55 #include "parsedate.h" 56 #include "connect.h" /* for the connect timeout */ 57 #include "select.h" 58 #include "strcase.h" 59 #include "x509asn1.h" 60 #include "curl_printf.h" 61 62 #include <cyassl/ssl.h> 63 #ifdef HAVE_CYASSL_ERROR_SSL_H 64 #include <cyassl/error-ssl.h> 65 #else 66 #include <cyassl/error.h> 67 #endif 68 #include <cyassl/ctaocrypt/random.h> 69 #include <cyassl/ctaocrypt/sha256.h> 70 71 #include "cyassl.h" 72 73 /* The last #include files should be: */ 74 #include "curl_memory.h" 75 #include "memdebug.h" 76 77 #if LIBCYASSL_VERSION_HEX < 0x02007002 /* < 2.7.2 */ 78 #define CYASSL_MAX_ERROR_SZ 80 79 #endif 80 81 /* To determine what functions are available we rely on one or both of: 82 - the user's options.h generated by CyaSSL/wolfSSL 83 - the symbols detected by curl's configure 84 Since they are markedly different from one another, and one or the other may 85 not be available, we do some checking below to bring things in sync. */ 86 87 /* HAVE_ALPN is wolfSSL's build time symbol for enabling ALPN in options.h. */ 88 #ifndef HAVE_ALPN 89 #ifdef HAVE_WOLFSSL_USEALPN 90 #define HAVE_ALPN 91 #endif 92 #endif 93 94 /* WOLFSSL_ALLOW_SSLV3 is wolfSSL's build time symbol for enabling SSLv3 in 95 options.h, but is only seen in >= 3.6.6 since that's when they started 96 disabling SSLv3 by default. */ 97 #ifndef WOLFSSL_ALLOW_SSLV3 98 #if (LIBCYASSL_VERSION_HEX < 0x03006006) || \ 99 defined(HAVE_WOLFSSLV3_CLIENT_METHOD) 100 #define WOLFSSL_ALLOW_SSLV3 101 #endif 102 #endif 103 104 /* HAVE_SUPPORTED_CURVES is wolfSSL's build time symbol for enabling the ECC 105 supported curve extension in options.h. Note ECC is enabled separately. */ 106 #ifndef HAVE_SUPPORTED_CURVES 107 #if defined(HAVE_CYASSL_CTX_USESUPPORTEDCURVE) || \ 108 defined(HAVE_WOLFSSL_CTX_USESUPPORTEDCURVE) 109 #define HAVE_SUPPORTED_CURVES 110 #endif 111 #endif 112 113 static Curl_recv cyassl_recv; 114 static Curl_send cyassl_send; 115 116 117 static int do_file_type(const char *type) 118 { 119 if(!type || !type[0]) 120 return SSL_FILETYPE_PEM; 121 if(strcasecompare(type, "PEM")) 122 return SSL_FILETYPE_PEM; 123 if(strcasecompare(type, "DER")) 124 return SSL_FILETYPE_ASN1; 125 return -1; 126 } 127 128 /* 129 * This function loads all the client/CA certificates and CRLs. Setup the TLS 130 * layer and do all necessary magic. 131 */ 132 static CURLcode 133 cyassl_connect_step1(struct connectdata *conn, 134 int sockindex) 135 { 136 char error_buffer[CYASSL_MAX_ERROR_SZ]; 137 struct Curl_easy *data = conn->data; 138 struct ssl_connect_data* conssl = &conn->ssl[sockindex]; 139 SSL_METHOD* req_method = NULL; 140 curl_socket_t sockfd = conn->sock[sockindex]; 141 #ifdef HAVE_SNI 142 bool sni = FALSE; 143 #define use_sni(x) sni = (x) 144 #else 145 #define use_sni(x) Curl_nop_stmt 146 #endif 147 148 if(conssl->state == ssl_connection_complete) 149 return CURLE_OK; 150 151 /* check to see if we've been told to use an explicit SSL/TLS version */ 152 switch(SSL_CONN_CONFIG(version)) { 153 case CURL_SSLVERSION_DEFAULT: 154 case CURL_SSLVERSION_TLSv1: 155 #if LIBCYASSL_VERSION_HEX >= 0x03003000 /* >= 3.3.0 */ 156 /* minimum protocol version is set later after the CTX object is created */ 157 req_method = SSLv23_client_method(); 158 #else 159 infof(data, "CyaSSL <3.3.0 cannot be configured to use TLS 1.0-1.2, " 160 "TLS 1.0 is used exclusively\n"); 161 req_method = TLSv1_client_method(); 162 #endif 163 use_sni(TRUE); 164 break; 165 case CURL_SSLVERSION_TLSv1_0: 166 req_method = TLSv1_client_method(); 167 use_sni(TRUE); 168 break; 169 case CURL_SSLVERSION_TLSv1_1: 170 req_method = TLSv1_1_client_method(); 171 use_sni(TRUE); 172 break; 173 case CURL_SSLVERSION_TLSv1_2: 174 req_method = TLSv1_2_client_method(); 175 use_sni(TRUE); 176 break; 177 case CURL_SSLVERSION_TLSv1_3: 178 failf(data, "CyaSSL: TLS 1.3 is not yet supported"); 179 return CURLE_SSL_CONNECT_ERROR; 180 case CURL_SSLVERSION_SSLv3: 181 #ifdef WOLFSSL_ALLOW_SSLV3 182 req_method = SSLv3_client_method(); 183 use_sni(FALSE); 184 #else 185 failf(data, "CyaSSL does not support SSLv3"); 186 return CURLE_NOT_BUILT_IN; 187 #endif 188 break; 189 case CURL_SSLVERSION_SSLv2: 190 failf(data, "CyaSSL does not support SSLv2"); 191 return CURLE_SSL_CONNECT_ERROR; 192 default: 193 failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION"); 194 return CURLE_SSL_CONNECT_ERROR; 195 } 196 197 if(!req_method) { 198 failf(data, "SSL: couldn't create a method!"); 199 return CURLE_OUT_OF_MEMORY; 200 } 201 202 if(conssl->ctx) 203 SSL_CTX_free(conssl->ctx); 204 conssl->ctx = SSL_CTX_new(req_method); 205 206 if(!conssl->ctx) { 207 failf(data, "SSL: couldn't create a context!"); 208 return CURLE_OUT_OF_MEMORY; 209 } 210 211 switch(SSL_CONN_CONFIG(version)) { 212 case CURL_SSLVERSION_DEFAULT: 213 case CURL_SSLVERSION_TLSv1: 214 #if LIBCYASSL_VERSION_HEX > 0x03004006 /* > 3.4.6 */ 215 /* Versions 3.3.0 to 3.4.6 we know the minimum protocol version is whatever 216 minimum version of TLS was built in and at least TLS 1.0. For later library 217 versions that could change (eg TLS 1.0 built in but defaults to TLS 1.1) so 218 we have this short circuit evaluation to find the minimum supported TLS 219 version. We use wolfSSL_CTX_SetMinVersion and not CyaSSL_SetMinVersion 220 because only the former will work before the user's CTX callback is called. 221 */ 222 if((wolfSSL_CTX_SetMinVersion(conssl->ctx, WOLFSSL_TLSV1) != 1) && 223 (wolfSSL_CTX_SetMinVersion(conssl->ctx, WOLFSSL_TLSV1_1) != 1) && 224 (wolfSSL_CTX_SetMinVersion(conssl->ctx, WOLFSSL_TLSV1_2) != 1)) { 225 failf(data, "SSL: couldn't set the minimum protocol version"); 226 return CURLE_SSL_CONNECT_ERROR; 227 } 228 #endif 229 break; 230 } 231 232 #ifndef NO_FILESYSTEM 233 /* load trusted cacert */ 234 if(SSL_CONN_CONFIG(CAfile)) { 235 if(1 != SSL_CTX_load_verify_locations(conssl->ctx, 236 SSL_CONN_CONFIG(CAfile), 237 SSL_CONN_CONFIG(CApath))) { 238 if(SSL_CONN_CONFIG(verifypeer)) { 239 /* Fail if we insist on successfully verifying the server. */ 240 failf(data, "error setting certificate verify locations:\n" 241 " CAfile: %s\n CApath: %s", 242 SSL_CONN_CONFIG(CAfile)? 243 SSL_CONN_CONFIG(CAfile): "none", 244 SSL_CONN_CONFIG(CApath)? 245 SSL_CONN_CONFIG(CApath) : "none"); 246 return CURLE_SSL_CACERT_BADFILE; 247 } 248 else { 249 /* Just continue with a warning if no strict certificate 250 verification is required. */ 251 infof(data, "error setting certificate verify locations," 252 " continuing anyway:\n"); 253 } 254 } 255 else { 256 /* Everything is fine. */ 257 infof(data, "successfully set certificate verify locations:\n"); 258 } 259 infof(data, 260 " CAfile: %s\n" 261 " CApath: %s\n", 262 SSL_CONN_CONFIG(CAfile) ? SSL_CONN_CONFIG(CAfile): 263 "none", 264 SSL_CONN_CONFIG(CApath) ? SSL_CONN_CONFIG(CApath): 265 "none"); 266 } 267 268 /* Load the client certificate, and private key */ 269 if(SSL_SET_OPTION(cert) && SSL_SET_OPTION(key)) { 270 int file_type = do_file_type(SSL_SET_OPTION(cert_type)); 271 272 if(SSL_CTX_use_certificate_file(conssl->ctx, SSL_SET_OPTION(cert), 273 file_type) != 1) { 274 failf(data, "unable to use client certificate (no key or wrong pass" 275 " phrase?)"); 276 return CURLE_SSL_CONNECT_ERROR; 277 } 278 279 file_type = do_file_type(SSL_SET_OPTION(key_type)); 280 if(SSL_CTX_use_PrivateKey_file(conssl->ctx, SSL_SET_OPTION(key), 281 file_type) != 1) { 282 failf(data, "unable to set private key"); 283 return CURLE_SSL_CONNECT_ERROR; 284 } 285 } 286 #endif /* !NO_FILESYSTEM */ 287 288 /* SSL always tries to verify the peer, this only says whether it should 289 * fail to connect if the verification fails, or if it should continue 290 * anyway. In the latter case the result of the verification is checked with 291 * SSL_get_verify_result() below. */ 292 SSL_CTX_set_verify(conssl->ctx, 293 SSL_CONN_CONFIG(verifypeer)?SSL_VERIFY_PEER: 294 SSL_VERIFY_NONE, 295 NULL); 296 297 #ifdef HAVE_SNI 298 if(sni) { 299 struct in_addr addr4; 300 #ifdef ENABLE_IPV6 301 struct in6_addr addr6; 302 #endif 303 const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name : 304 conn->host.name; 305 size_t hostname_len = strlen(hostname); 306 if((hostname_len < USHRT_MAX) && 307 (0 == Curl_inet_pton(AF_INET, hostname, &addr4)) && 308 #ifdef ENABLE_IPV6 309 (0 == Curl_inet_pton(AF_INET6, hostname, &addr6)) && 310 #endif 311 (CyaSSL_CTX_UseSNI(conssl->ctx, CYASSL_SNI_HOST_NAME, hostname, 312 (unsigned short)hostname_len) != 1)) { 313 infof(data, "WARNING: failed to configure server name indication (SNI) " 314 "TLS extension\n"); 315 } 316 } 317 #endif 318 319 #ifdef HAVE_SUPPORTED_CURVES 320 /* CyaSSL/wolfSSL does not send the supported ECC curves ext automatically: 321 https://github.com/wolfSSL/wolfssl/issues/366 322 The supported curves below are those also supported by OpenSSL 1.0.2 and 323 in the same order. */ 324 CyaSSL_CTX_UseSupportedCurve(conssl->ctx, 0x17); /* secp256r1 */ 325 CyaSSL_CTX_UseSupportedCurve(conssl->ctx, 0x19); /* secp521r1 */ 326 CyaSSL_CTX_UseSupportedCurve(conssl->ctx, 0x18); /* secp384r1 */ 327 #endif 328 329 /* give application a chance to interfere with SSL set up. */ 330 if(data->set.ssl.fsslctx) { 331 CURLcode result = CURLE_OK; 332 result = (*data->set.ssl.fsslctx)(data, conssl->ctx, 333 data->set.ssl.fsslctxp); 334 if(result) { 335 failf(data, "error signaled by ssl ctx callback"); 336 return result; 337 } 338 } 339 #ifdef NO_FILESYSTEM 340 else if(SSL_CONN_CONFIG(verifypeer)) { 341 failf(data, "SSL: Certificates couldn't be loaded because CyaSSL was built" 342 " with \"no filesystem\". Either disable peer verification" 343 " (insecure) or if you are building an application with libcurl you" 344 " can load certificates via CURLOPT_SSL_CTX_FUNCTION."); 345 return CURLE_SSL_CONNECT_ERROR; 346 } 347 #endif 348 349 /* Let's make an SSL structure */ 350 if(conssl->handle) 351 SSL_free(conssl->handle); 352 conssl->handle = SSL_new(conssl->ctx); 353 if(!conssl->handle) { 354 failf(data, "SSL: couldn't create a context (handle)!"); 355 return CURLE_OUT_OF_MEMORY; 356 } 357 358 #ifdef HAVE_ALPN 359 if(conn->bits.tls_enable_alpn) { 360 char protocols[128]; 361 *protocols = '\0'; 362 363 /* wolfSSL's ALPN protocol name list format is a comma separated string of 364 protocols in descending order of preference, eg: "h2,http/1.1" */ 365 366 #ifdef USE_NGHTTP2 367 if(data->set.httpversion >= CURL_HTTP_VERSION_2) { 368 strcpy(protocols + strlen(protocols), NGHTTP2_PROTO_VERSION_ID ","); 369 infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID); 370 } 371 #endif 372 373 strcpy(protocols + strlen(protocols), ALPN_HTTP_1_1); 374 infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1); 375 376 if(wolfSSL_UseALPN(conssl->handle, protocols, 377 (unsigned)strlen(protocols), 378 WOLFSSL_ALPN_CONTINUE_ON_MISMATCH) != SSL_SUCCESS) { 379 failf(data, "SSL: failed setting ALPN protocols"); 380 return CURLE_SSL_CONNECT_ERROR; 381 } 382 } 383 #endif /* HAVE_ALPN */ 384 385 /* Check if there's a cached ID we can/should use here! */ 386 if(data->set.general_ssl.sessionid) { 387 void *ssl_sessionid = NULL; 388 389 Curl_ssl_sessionid_lock(conn); 390 if(!Curl_ssl_getsessionid(conn, &ssl_sessionid, NULL, sockindex)) { 391 /* we got a session id, use it! */ 392 if(!SSL_set_session(conssl->handle, ssl_sessionid)) { 393 Curl_ssl_sessionid_unlock(conn); 394 failf(data, "SSL: SSL_set_session failed: %s", 395 ERR_error_string(SSL_get_error(conssl->handle, 0), 396 error_buffer)); 397 return CURLE_SSL_CONNECT_ERROR; 398 } 399 /* Informational message */ 400 infof (data, "SSL re-using session ID\n"); 401 } 402 Curl_ssl_sessionid_unlock(conn); 403 } 404 405 /* pass the raw socket into the SSL layer */ 406 if(!SSL_set_fd(conssl->handle, (int)sockfd)) { 407 failf(data, "SSL: SSL_set_fd failed"); 408 return CURLE_SSL_CONNECT_ERROR; 409 } 410 411 conssl->connecting_state = ssl_connect_2; 412 return CURLE_OK; 413 } 414 415 416 static CURLcode 417 cyassl_connect_step2(struct connectdata *conn, 418 int sockindex) 419 { 420 int ret = -1; 421 struct Curl_easy *data = conn->data; 422 struct ssl_connect_data* conssl = &conn->ssl[sockindex]; 423 const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name : 424 conn->host.name; 425 const char * const dispname = SSL_IS_PROXY() ? 426 conn->http_proxy.host.dispname : conn->host.dispname; 427 428 conn->recv[sockindex] = cyassl_recv; 429 conn->send[sockindex] = cyassl_send; 430 431 /* Enable RFC2818 checks */ 432 if(SSL_CONN_CONFIG(verifyhost)) { 433 ret = CyaSSL_check_domain_name(conssl->handle, hostname); 434 if(ret == SSL_FAILURE) 435 return CURLE_OUT_OF_MEMORY; 436 } 437 438 ret = SSL_connect(conssl->handle); 439 if(ret != 1) { 440 char error_buffer[CYASSL_MAX_ERROR_SZ]; 441 int detail = SSL_get_error(conssl->handle, ret); 442 443 if(SSL_ERROR_WANT_READ == detail) { 444 conssl->connecting_state = ssl_connect_2_reading; 445 return CURLE_OK; 446 } 447 else if(SSL_ERROR_WANT_WRITE == detail) { 448 conssl->connecting_state = ssl_connect_2_writing; 449 return CURLE_OK; 450 } 451 /* There is no easy way to override only the CN matching. 452 * This will enable the override of both mismatching SubjectAltNames 453 * as also mismatching CN fields */ 454 else if(DOMAIN_NAME_MISMATCH == detail) { 455 #if 1 456 failf(data, "\tsubject alt name(s) or common name do not match \"%s\"\n", 457 dispname); 458 return CURLE_PEER_FAILED_VERIFICATION; 459 #else 460 /* When the CyaSSL_check_domain_name() is used and you desire to continue 461 * on a DOMAIN_NAME_MISMATCH, i.e. 'conn->ssl_config.verifyhost == 0', 462 * CyaSSL version 2.4.0 will fail with an INCOMPLETE_DATA error. The only 463 * way to do this is currently to switch the CyaSSL_check_domain_name() 464 * in and out based on the 'conn->ssl_config.verifyhost' value. */ 465 if(SSL_CONN_CONFIG(verifyhost)) { 466 failf(data, 467 "\tsubject alt name(s) or common name do not match \"%s\"\n", 468 dispname); 469 return CURLE_PEER_FAILED_VERIFICATION; 470 } 471 else { 472 infof(data, 473 "\tsubject alt name(s) and/or common name do not match \"%s\"\n", 474 dispname); 475 return CURLE_OK; 476 } 477 #endif 478 } 479 #if LIBCYASSL_VERSION_HEX >= 0x02007000 /* 2.7.0 */ 480 else if(ASN_NO_SIGNER_E == detail) { 481 if(SSL_CONN_CONFIG(verifypeer)) { 482 failf(data, "\tCA signer not available for verification\n"); 483 return CURLE_SSL_CACERT_BADFILE; 484 } 485 else { 486 /* Just continue with a warning if no strict certificate 487 verification is required. */ 488 infof(data, "CA signer not available for verification, " 489 "continuing anyway\n"); 490 } 491 } 492 #endif 493 else { 494 failf(data, "SSL_connect failed with error %d: %s", detail, 495 ERR_error_string(detail, error_buffer)); 496 return CURLE_SSL_CONNECT_ERROR; 497 } 498 } 499 500 if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) { 501 #ifdef KEEP_PEER_CERT 502 X509 *x509; 503 const char *x509_der; 504 int x509_der_len; 505 curl_X509certificate x509_parsed; 506 curl_asn1Element *pubkey; 507 CURLcode result; 508 509 x509 = SSL_get_peer_certificate(conssl->handle); 510 if(!x509) { 511 failf(data, "SSL: failed retrieving server certificate"); 512 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 513 } 514 515 x509_der = (const char *)CyaSSL_X509_get_der(x509, &x509_der_len); 516 if(!x509_der) { 517 failf(data, "SSL: failed retrieving ASN.1 server certificate"); 518 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 519 } 520 521 memset(&x509_parsed, 0, sizeof x509_parsed); 522 if(Curl_parseX509(&x509_parsed, x509_der, x509_der + x509_der_len)) 523 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 524 525 pubkey = &x509_parsed.subjectPublicKeyInfo; 526 if(!pubkey->header || pubkey->end <= pubkey->header) { 527 failf(data, "SSL: failed retrieving public key from server certificate"); 528 return CURLE_SSL_PINNEDPUBKEYNOTMATCH; 529 } 530 531 result = Curl_pin_peer_pubkey(data, 532 data->set.str[STRING_SSL_PINNEDPUBLICKEY], 533 (const unsigned char *)pubkey->header, 534 (size_t)(pubkey->end - pubkey->header)); 535 if(result) { 536 failf(data, "SSL: public key does not match pinned public key!"); 537 return result; 538 } 539 #else 540 failf(data, "Library lacks pinning support built-in"); 541 return CURLE_NOT_BUILT_IN; 542 #endif 543 } 544 545 #ifdef HAVE_ALPN 546 if(conn->bits.tls_enable_alpn) { 547 int rc; 548 char *protocol = NULL; 549 unsigned short protocol_len = 0; 550 551 rc = wolfSSL_ALPN_GetProtocol(conssl->handle, &protocol, &protocol_len); 552 553 if(rc == SSL_SUCCESS) { 554 infof(data, "ALPN, server accepted to use %.*s\n", protocol_len, 555 protocol); 556 557 if(protocol_len == ALPN_HTTP_1_1_LENGTH && 558 !memcmp(protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) 559 conn->negnpn = CURL_HTTP_VERSION_1_1; 560 #ifdef USE_NGHTTP2 561 else if(data->set.httpversion >= CURL_HTTP_VERSION_2 && 562 protocol_len == NGHTTP2_PROTO_VERSION_ID_LEN && 563 !memcmp(protocol, NGHTTP2_PROTO_VERSION_ID, 564 NGHTTP2_PROTO_VERSION_ID_LEN)) 565 conn->negnpn = CURL_HTTP_VERSION_2; 566 #endif 567 else 568 infof(data, "ALPN, unrecognized protocol %.*s\n", protocol_len, 569 protocol); 570 } 571 else if(rc == SSL_ALPN_NOT_FOUND) 572 infof(data, "ALPN, server did not agree to a protocol\n"); 573 else { 574 failf(data, "ALPN, failure getting protocol, error %d", rc); 575 return CURLE_SSL_CONNECT_ERROR; 576 } 577 } 578 #endif /* HAVE_ALPN */ 579 580 conssl->connecting_state = ssl_connect_3; 581 infof(data, "SSL connected\n"); 582 583 return CURLE_OK; 584 } 585 586 587 static CURLcode 588 cyassl_connect_step3(struct connectdata *conn, 589 int sockindex) 590 { 591 CURLcode result = CURLE_OK; 592 struct Curl_easy *data = conn->data; 593 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 594 595 DEBUGASSERT(ssl_connect_3 == connssl->connecting_state); 596 597 if(data->set.general_ssl.sessionid) { 598 bool incache; 599 SSL_SESSION *our_ssl_sessionid; 600 void *old_ssl_sessionid = NULL; 601 602 our_ssl_sessionid = SSL_get_session(connssl->handle); 603 604 Curl_ssl_sessionid_lock(conn); 605 incache = !(Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL, 606 sockindex)); 607 if(incache) { 608 if(old_ssl_sessionid != our_ssl_sessionid) { 609 infof(data, "old SSL session ID is stale, removing\n"); 610 Curl_ssl_delsessionid(conn, old_ssl_sessionid); 611 incache = FALSE; 612 } 613 } 614 615 if(!incache) { 616 result = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 617 0 /* unknown size */, sockindex); 618 if(result) { 619 Curl_ssl_sessionid_unlock(conn); 620 failf(data, "failed to store ssl session"); 621 return result; 622 } 623 } 624 Curl_ssl_sessionid_unlock(conn); 625 } 626 627 connssl->connecting_state = ssl_connect_done; 628 629 return result; 630 } 631 632 633 static ssize_t cyassl_send(struct connectdata *conn, 634 int sockindex, 635 const void *mem, 636 size_t len, 637 CURLcode *curlcode) 638 { 639 char error_buffer[CYASSL_MAX_ERROR_SZ]; 640 int memlen = (len > (size_t)INT_MAX) ? INT_MAX : (int)len; 641 int rc = SSL_write(conn->ssl[sockindex].handle, mem, memlen); 642 643 if(rc < 0) { 644 int err = SSL_get_error(conn->ssl[sockindex].handle, rc); 645 646 switch(err) { 647 case SSL_ERROR_WANT_READ: 648 case SSL_ERROR_WANT_WRITE: 649 /* there's data pending, re-invoke SSL_write() */ 650 *curlcode = CURLE_AGAIN; 651 return -1; 652 default: 653 failf(conn->data, "SSL write: %s, errno %d", 654 ERR_error_string(err, error_buffer), 655 SOCKERRNO); 656 *curlcode = CURLE_SEND_ERROR; 657 return -1; 658 } 659 } 660 return rc; 661 } 662 663 void Curl_cyassl_close(struct connectdata *conn, int sockindex) 664 { 665 struct ssl_connect_data *conssl = &conn->ssl[sockindex]; 666 667 if(conssl->handle) { 668 (void)SSL_shutdown(conssl->handle); 669 SSL_free (conssl->handle); 670 conssl->handle = NULL; 671 } 672 if(conssl->ctx) { 673 SSL_CTX_free (conssl->ctx); 674 conssl->ctx = NULL; 675 } 676 } 677 678 static ssize_t cyassl_recv(struct connectdata *conn, 679 int num, 680 char *buf, 681 size_t buffersize, 682 CURLcode *curlcode) 683 { 684 char error_buffer[CYASSL_MAX_ERROR_SZ]; 685 int buffsize = (buffersize > (size_t)INT_MAX) ? INT_MAX : (int)buffersize; 686 int nread = SSL_read(conn->ssl[num].handle, buf, buffsize); 687 688 if(nread < 0) { 689 int err = SSL_get_error(conn->ssl[num].handle, nread); 690 691 switch(err) { 692 case SSL_ERROR_ZERO_RETURN: /* no more data */ 693 break; 694 case SSL_ERROR_WANT_READ: 695 case SSL_ERROR_WANT_WRITE: 696 /* there's data pending, re-invoke SSL_read() */ 697 *curlcode = CURLE_AGAIN; 698 return -1; 699 default: 700 failf(conn->data, "SSL read: %s, errno %d", 701 ERR_error_string(err, error_buffer), 702 SOCKERRNO); 703 *curlcode = CURLE_RECV_ERROR; 704 return -1; 705 } 706 } 707 return nread; 708 } 709 710 711 void Curl_cyassl_session_free(void *ptr) 712 { 713 (void)ptr; 714 /* CyaSSL reuses sessions on own, no free */ 715 } 716 717 718 size_t Curl_cyassl_version(char *buffer, size_t size) 719 { 720 #ifdef WOLFSSL_VERSION 721 return snprintf(buffer, size, "wolfSSL/%s", WOLFSSL_VERSION); 722 #elif defined(CYASSL_VERSION) 723 return snprintf(buffer, size, "CyaSSL/%s", CYASSL_VERSION); 724 #else 725 return snprintf(buffer, size, "CyaSSL/%s", "<1.8.8"); 726 #endif 727 } 728 729 730 int Curl_cyassl_init(void) 731 { 732 return (CyaSSL_Init() == SSL_SUCCESS); 733 } 734 735 736 bool Curl_cyassl_data_pending(const struct connectdata* conn, int connindex) 737 { 738 if(conn->ssl[connindex].handle) /* SSL is in use */ 739 return (0 != SSL_pending(conn->ssl[connindex].handle)) ? TRUE : FALSE; 740 else 741 return FALSE; 742 } 743 744 745 /* 746 * This function is called to shut down the SSL layer but keep the 747 * socket open (CCC - Clear Command Channel) 748 */ 749 int Curl_cyassl_shutdown(struct connectdata *conn, int sockindex) 750 { 751 int retval = 0; 752 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 753 754 if(connssl->handle) { 755 SSL_free (connssl->handle); 756 connssl->handle = NULL; 757 } 758 return retval; 759 } 760 761 762 static CURLcode 763 cyassl_connect_common(struct connectdata *conn, 764 int sockindex, 765 bool nonblocking, 766 bool *done) 767 { 768 CURLcode result; 769 struct Curl_easy *data = conn->data; 770 struct ssl_connect_data *connssl = &conn->ssl[sockindex]; 771 curl_socket_t sockfd = conn->sock[sockindex]; 772 long timeout_ms; 773 int what; 774 775 /* check if the connection has already been established */ 776 if(ssl_connection_complete == connssl->state) { 777 *done = TRUE; 778 return CURLE_OK; 779 } 780 781 if(ssl_connect_1==connssl->connecting_state) { 782 /* Find out how much more time we're allowed */ 783 timeout_ms = Curl_timeleft(data, NULL, TRUE); 784 785 if(timeout_ms < 0) { 786 /* no need to continue if time already is up */ 787 failf(data, "SSL connection timeout"); 788 return CURLE_OPERATION_TIMEDOUT; 789 } 790 791 result = cyassl_connect_step1(conn, sockindex); 792 if(result) 793 return result; 794 } 795 796 while(ssl_connect_2 == connssl->connecting_state || 797 ssl_connect_2_reading == connssl->connecting_state || 798 ssl_connect_2_writing == connssl->connecting_state) { 799 800 /* check allowed time left */ 801 timeout_ms = Curl_timeleft(data, NULL, TRUE); 802 803 if(timeout_ms < 0) { 804 /* no need to continue if time already is up */ 805 failf(data, "SSL connection timeout"); 806 return CURLE_OPERATION_TIMEDOUT; 807 } 808 809 /* if ssl is expecting something, check if it's available. */ 810 if(connssl->connecting_state == ssl_connect_2_reading 811 || connssl->connecting_state == ssl_connect_2_writing) { 812 813 curl_socket_t writefd = ssl_connect_2_writing== 814 connssl->connecting_state?sockfd:CURL_SOCKET_BAD; 815 curl_socket_t readfd = ssl_connect_2_reading== 816 connssl->connecting_state?sockfd:CURL_SOCKET_BAD; 817 818 what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd, 819 nonblocking?0:timeout_ms); 820 if(what < 0) { 821 /* fatal error */ 822 failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO); 823 return CURLE_SSL_CONNECT_ERROR; 824 } 825 else if(0 == what) { 826 if(nonblocking) { 827 *done = FALSE; 828 return CURLE_OK; 829 } 830 else { 831 /* timeout */ 832 failf(data, "SSL connection timeout"); 833 return CURLE_OPERATION_TIMEDOUT; 834 } 835 } 836 /* socket is readable or writable */ 837 } 838 839 /* Run transaction, and return to the caller if it failed or if 840 * this connection is part of a multi handle and this loop would 841 * execute again. This permits the owner of a multi handle to 842 * abort a connection attempt before step2 has completed while 843 * ensuring that a client using select() or epoll() will always 844 * have a valid fdset to wait on. 845 */ 846 result = cyassl_connect_step2(conn, sockindex); 847 if(result || (nonblocking && 848 (ssl_connect_2 == connssl->connecting_state || 849 ssl_connect_2_reading == connssl->connecting_state || 850 ssl_connect_2_writing == connssl->connecting_state))) 851 return result; 852 } /* repeat step2 until all transactions are done. */ 853 854 if(ssl_connect_3 == connssl->connecting_state) { 855 result = cyassl_connect_step3(conn, sockindex); 856 if(result) 857 return result; 858 } 859 860 if(ssl_connect_done == connssl->connecting_state) { 861 connssl->state = ssl_connection_complete; 862 conn->recv[sockindex] = cyassl_recv; 863 conn->send[sockindex] = cyassl_send; 864 *done = TRUE; 865 } 866 else 867 *done = FALSE; 868 869 /* Reset our connect state machine */ 870 connssl->connecting_state = ssl_connect_1; 871 872 return CURLE_OK; 873 } 874 875 876 CURLcode 877 Curl_cyassl_connect_nonblocking(struct connectdata *conn, 878 int sockindex, 879 bool *done) 880 { 881 return cyassl_connect_common(conn, sockindex, TRUE, done); 882 } 883 884 885 CURLcode 886 Curl_cyassl_connect(struct connectdata *conn, 887 int sockindex) 888 { 889 CURLcode result; 890 bool done = FALSE; 891 892 result = cyassl_connect_common(conn, sockindex, FALSE, &done); 893 if(result) 894 return result; 895 896 DEBUGASSERT(done); 897 898 return CURLE_OK; 899 } 900 901 int Curl_cyassl_random(struct Curl_easy *data, 902 unsigned char *entropy, 903 size_t length) 904 { 905 RNG rng; 906 (void)data; 907 if(InitRng(&rng)) 908 return 1; 909 if(length > UINT_MAX) 910 return 1; 911 if(RNG_GenerateBlock(&rng, entropy, (unsigned)length)) 912 return 1; 913 return 0; 914 } 915 916 void Curl_cyassl_sha256sum(const unsigned char *tmp, /* input */ 917 size_t tmplen, 918 unsigned char *sha256sum /* output */, 919 size_t unused) 920 { 921 Sha256 SHA256pw; 922 (void)unused; 923 InitSha256(&SHA256pw); 924 Sha256Update(&SHA256pw, tmp, (word32)tmplen); 925 Sha256Final(&SHA256pw, sha256sum); 926 } 927 928 #endif 929
