1 /* $OpenBSD: s_cb.c,v 1.21 2023/04/14 15:27:13 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 112 #include <sys/socket.h> 113 114 #include <netinet/in.h> 115 116 #include <netdb.h> 117 #include <stdio.h> 118 #include <stdlib.h> 119 #include <string.h> 120 121 #include "apps.h" 122 123 #include <openssl/err.h> 124 #include <openssl/ssl.h> 125 #include <openssl/x509.h> 126 127 #include "s_apps.h" 128 129 #define COOKIE_SECRET_LENGTH 16 130 131 int verify_depth = 0; 132 int verify_return_error = 0; 133 unsigned char cookie_secret[COOKIE_SECRET_LENGTH]; 134 int cookie_initialized = 0; 135 136 int 137 verify_callback(int ok, X509_STORE_CTX * ctx) 138 { 139 X509 *err_cert; 140 int err, depth; 141 142 err_cert = X509_STORE_CTX_get_current_cert(ctx); 143 err = X509_STORE_CTX_get_error(ctx); 144 depth = X509_STORE_CTX_get_error_depth(ctx); 145 146 BIO_printf(bio_err, "depth=%d ", depth); 147 if (err_cert) { 148 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert), 149 0, XN_FLAG_ONELINE); 150 BIO_puts(bio_err, "\n"); 151 } else 152 BIO_puts(bio_err, "<no cert>\n"); 153 if (!ok) { 154 BIO_printf(bio_err, "verify error:num=%d:%s\n", err, 155 X509_verify_cert_error_string(err)); 156 if (verify_depth >= depth) { 157 if (!verify_return_error) 158 ok = 1; 159 } else { 160 ok = 0; 161 } 162 } 163 switch (err) { 164 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 165 BIO_puts(bio_err, "issuer= "); 166 if (err_cert == NULL) 167 BIO_puts(bio_err, "<error getting cert>"); 168 else 169 X509_NAME_print_ex(bio_err, 170 X509_get_issuer_name(err_cert), 0, XN_FLAG_ONELINE); 171 BIO_puts(bio_err, "\n"); 172 break; 173 case X509_V_ERR_CERT_NOT_YET_VALID: 174 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 175 BIO_printf(bio_err, "notBefore="); 176 if (err_cert == NULL) 177 BIO_printf(bio_err, " <error getting cert>"); 178 else 179 ASN1_TIME_print(bio_err, X509_get_notBefore(err_cert)); 180 BIO_printf(bio_err, "\n"); 181 break; 182 case X509_V_ERR_CERT_HAS_EXPIRED: 183 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 184 BIO_printf(bio_err, "notAfter="); 185 if (err_cert == NULL) 186 BIO_printf(bio_err, " <error getting cert>"); 187 else 188 ASN1_TIME_print(bio_err, X509_get_notAfter(err_cert)); 189 BIO_printf(bio_err, "\n"); 190 break; 191 case X509_V_ERR_NO_EXPLICIT_POLICY: 192 break; 193 } 194 195 BIO_printf(bio_err, "verify return:%d\n", ok); 196 return (ok); 197 } 198 199 int 200 set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file) 201 { 202 if (cert_file == NULL) 203 return 1; 204 205 if (key_file == NULL) 206 key_file = cert_file; 207 208 if (SSL_CTX_use_certificate_file(ctx, cert_file, SSL_FILETYPE_PEM) <= 0) { 209 BIO_printf(bio_err, 210 "unable to get certificate from '%s'\n", cert_file); 211 ERR_print_errors(bio_err); 212 return 0; 213 } 214 if (SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) { 215 BIO_printf(bio_err, "unable to get private key from '%s'\n", 216 key_file); 217 ERR_print_errors(bio_err); 218 return 0; 219 } 220 221 /* Now we know that a key and cert have been set against the context. */ 222 if (!SSL_CTX_check_private_key(ctx)) { 223 BIO_printf(bio_err, 224 "Private key does not match the certificate public key\n"); 225 return 0; 226 } 227 228 return 1; 229 } 230 231 int 232 set_cert_key_stuff(SSL_CTX * ctx, X509 * cert, EVP_PKEY * key) 233 { 234 if (cert == NULL) 235 return 1; 236 if (SSL_CTX_use_certificate(ctx, cert) <= 0) { 237 BIO_printf(bio_err, "error setting certificate\n"); 238 ERR_print_errors(bio_err); 239 return 0; 240 } 241 if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) { 242 BIO_printf(bio_err, "error setting private key\n"); 243 ERR_print_errors(bio_err); 244 return 0; 245 } 246 /* 247 * Now we know that a key and cert have been set against the SSL 248 * context 249 */ 250 if (!SSL_CTX_check_private_key(ctx)) { 251 BIO_printf(bio_err, 252 "Private key does not match the certificate public key\n"); 253 return 0; 254 } 255 return 1; 256 } 257 258 int 259 ssl_print_tmp_key(BIO *out, SSL *s) 260 { 261 const char *cname; 262 EVP_PKEY *pkey; 263 EC_KEY *ec; 264 const EC_GROUP *group; 265 int nid; 266 267 if (!SSL_get_server_tmp_key(s, &pkey)) 268 return 0; 269 270 BIO_puts(out, "Server Temp Key: "); 271 switch (EVP_PKEY_id(pkey)) { 272 case EVP_PKEY_DH: 273 BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(pkey)); 274 break; 275 276 case EVP_PKEY_EC: 277 if ((ec = EVP_PKEY_get0_EC_KEY(pkey)) == NULL) 278 goto err; 279 if ((group = EC_KEY_get0_group(ec)) == NULL) 280 goto err; 281 282 nid = EC_GROUP_get_curve_name(group); 283 284 if ((cname = EC_curve_nid2nist(nid)) == NULL) 285 cname = OBJ_nid2sn(nid); 286 287 BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(pkey)); 288 break; 289 290 default: 291 BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(pkey)), 292 EVP_PKEY_bits(pkey)); 293 } 294 295 err: 296 EVP_PKEY_free(pkey); 297 return 1; 298 } 299 300 long 301 bio_dump_callback(BIO * bio, int cmd, const char *argp, 302 int argi, long argl, long ret) 303 { 304 BIO *out; 305 306 out = (BIO *) BIO_get_callback_arg(bio); 307 if (out == NULL) 308 return (ret); 309 310 if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) { 311 BIO_printf(out, 312 "read from %p [%p] (%lu bytes => %ld (0x%lX))\n", 313 (void *) bio, argp, (unsigned long) argi, ret, ret); 314 BIO_dump(out, argp, (int) ret); 315 return (ret); 316 } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) { 317 BIO_printf(out, 318 "write to %p [%p] (%lu bytes => %ld (0x%lX))\n", 319 (void *) bio, argp, (unsigned long) argi, ret, ret); 320 BIO_dump(out, argp, (int) ret); 321 } 322 return (ret); 323 } 324 325 void 326 apps_ssl_info_callback(const SSL * s, int where, int ret) 327 { 328 const char *str; 329 int w; 330 331 w = where & ~SSL_ST_MASK; 332 333 if (w & SSL_ST_CONNECT) 334 str = "SSL_connect"; 335 else if (w & SSL_ST_ACCEPT) 336 str = "SSL_accept"; 337 else 338 str = "undefined"; 339 340 if (where & SSL_CB_LOOP) { 341 BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s)); 342 } else if (where & SSL_CB_ALERT) { 343 str = (where & SSL_CB_READ) ? "read" : "write"; 344 BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str, 345 SSL_alert_type_string_long(ret), 346 SSL_alert_desc_string_long(ret)); 347 } else if (where & SSL_CB_EXIT) { 348 if (ret == 0) 349 BIO_printf(bio_err, "%s:failed in %s\n", 350 str, SSL_state_string_long(s)); 351 else if (ret < 0) { 352 BIO_printf(bio_err, "%s:error in %s\n", 353 str, SSL_state_string_long(s)); 354 } 355 } 356 } 357 358 359 void 360 msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg) 361 { 362 BIO *bio = arg; 363 const char *str_write_p, *str_version, *str_content_type = "", 364 *str_details1 = "", *str_details2 = ""; 365 366 str_write_p = write_p ? ">>>" : "<<<"; 367 368 /* XXX convert to using ssl_get_version */ 369 switch (version) { 370 case SSL2_VERSION: 371 str_version = "SSL 2.0"; 372 break; 373 case SSL3_VERSION: 374 str_version = "SSL 3.0 "; 375 break; 376 case TLS1_VERSION: 377 str_version = "TLS 1.0 "; 378 break; 379 case TLS1_1_VERSION: 380 str_version = "TLS 1.1 "; 381 break; 382 case TLS1_2_VERSION: 383 str_version = "TLS 1.2 "; 384 break; 385 case TLS1_3_VERSION: 386 str_version = "TLS 1.3 "; 387 break; 388 case DTLS1_VERSION: 389 str_version = "DTLS 1.0 "; 390 break; 391 case DTLS1_2_VERSION: 392 str_version = "DTLS 1.2 "; 393 break; 394 default: 395 str_version = "???"; 396 } 397 398 if (version == SSL2_VERSION) { 399 str_details1 = "???"; 400 401 if (len > 0) { 402 /* XXX magic numbers */ 403 switch (((const unsigned char *) buf)[0]) { 404 case 0: 405 str_details1 = ", ERROR:"; 406 str_details2 = " ???"; 407 if (len >= 3) { 408 unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2]; 409 410 switch (err) { 411 case 0x0001: 412 str_details2 = " NO-CIPHER-ERROR"; 413 break; 414 case 0x0002: 415 str_details2 = " NO-CERTIFICATE-ERROR"; 416 break; 417 case 0x0004: 418 str_details2 = " BAD-CERTIFICATE-ERROR"; 419 break; 420 case 0x0006: 421 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR"; 422 break; 423 } 424 } 425 break; 426 case 1: 427 str_details1 = ", CLIENT-HELLO"; 428 break; 429 case 2: 430 str_details1 = ", CLIENT-MASTER-KEY"; 431 break; 432 case 3: 433 str_details1 = ", CLIENT-FINISHED"; 434 break; 435 case 4: 436 str_details1 = ", SERVER-HELLO"; 437 break; 438 case 5: 439 str_details1 = ", SERVER-VERIFY"; 440 break; 441 case 6: 442 str_details1 = ", SERVER-FINISHED"; 443 break; 444 case 7: 445 str_details1 = ", REQUEST-CERTIFICATE"; 446 break; 447 case 8: 448 str_details1 = ", CLIENT-CERTIFICATE"; 449 break; 450 } 451 } 452 } 453 if (version == SSL3_VERSION || version == TLS1_VERSION || 454 version == TLS1_1_VERSION || version == TLS1_2_VERSION || 455 version == TLS1_3_VERSION || version == DTLS1_VERSION || 456 version == DTLS1_2_VERSION) { 457 /* XXX magic numbers are in ssl3.h */ 458 switch (content_type) { 459 case 20: 460 str_content_type = "ChangeCipherSpec"; 461 break; 462 case 21: 463 str_content_type = "Alert"; 464 break; 465 case 22: 466 str_content_type = "Handshake"; 467 break; 468 } 469 470 if (content_type == 21) { /* Alert */ 471 str_details1 = ", ???"; 472 473 if (len == 2) { 474 switch (((const unsigned char *) buf)[0]) { 475 case 1: 476 str_details1 = ", warning"; 477 break; 478 case 2: 479 str_details1 = ", fatal"; 480 break; 481 } 482 483 str_details2 = " ???"; 484 switch (((const unsigned char *) buf)[1]) { 485 case 0: 486 str_details2 = " close_notify"; 487 break; 488 case 10: 489 str_details2 = " unexpected_message"; 490 break; 491 case 20: 492 str_details2 = " bad_record_mac"; 493 break; 494 case 21: 495 str_details2 = " decryption_failed"; 496 break; 497 case 22: 498 str_details2 = " record_overflow"; 499 break; 500 case 30: 501 str_details2 = " decompression_failure"; 502 break; 503 case 40: 504 str_details2 = " handshake_failure"; 505 break; 506 case 42: 507 str_details2 = " bad_certificate"; 508 break; 509 case 43: 510 str_details2 = " unsupported_certificate"; 511 break; 512 case 44: 513 str_details2 = " certificate_revoked"; 514 break; 515 case 45: 516 str_details2 = " certificate_expired"; 517 break; 518 case 46: 519 str_details2 = " certificate_unknown"; 520 break; 521 case 47: 522 str_details2 = " illegal_parameter"; 523 break; 524 case 48: 525 str_details2 = " unknown_ca"; 526 break; 527 case 49: 528 str_details2 = " access_denied"; 529 break; 530 case 50: 531 str_details2 = " decode_error"; 532 break; 533 case 51: 534 str_details2 = " decrypt_error"; 535 break; 536 case 60: 537 str_details2 = " export_restriction"; 538 break; 539 case 70: 540 str_details2 = " protocol_version"; 541 break; 542 case 71: 543 str_details2 = " insufficient_security"; 544 break; 545 case 80: 546 str_details2 = " internal_error"; 547 break; 548 case 90: 549 str_details2 = " user_canceled"; 550 break; 551 case 100: 552 str_details2 = " no_renegotiation"; 553 break; 554 case 110: 555 str_details2 = " unsupported_extension"; 556 break; 557 case 111: 558 str_details2 = " certificate_unobtainable"; 559 break; 560 case 112: 561 str_details2 = " unrecognized_name"; 562 break; 563 case 113: 564 str_details2 = " bad_certificate_status_response"; 565 break; 566 case 114: 567 str_details2 = " bad_certificate_hash_value"; 568 break; 569 case 115: 570 str_details2 = " unknown_psk_identity"; 571 break; 572 } 573 } 574 } 575 if (content_type == 22) { /* Handshake */ 576 str_details1 = "???"; 577 578 if (len > 0) { 579 switch (((const unsigned char *) buf)[0]) { 580 case 0: 581 str_details1 = ", HelloRequest"; 582 break; 583 case 1: 584 str_details1 = ", ClientHello"; 585 break; 586 case 2: 587 str_details1 = ", ServerHello"; 588 break; 589 case 3: 590 str_details1 = ", HelloVerifyRequest"; 591 break; 592 case 4: 593 str_details1 = ", NewSessionTicket"; 594 break; 595 case 5: 596 str_details1 = ", EndOfEarlyData"; 597 break; 598 case 8: 599 str_details1 = ", EncryptedExtensions"; 600 break; 601 case 11: 602 str_details1 = ", Certificate"; 603 break; 604 case 12: 605 str_details1 = ", ServerKeyExchange"; 606 break; 607 case 13: 608 str_details1 = ", CertificateRequest"; 609 break; 610 case 14: 611 str_details1 = ", ServerHelloDone"; 612 break; 613 case 15: 614 str_details1 = ", CertificateVerify"; 615 break; 616 case 16: 617 str_details1 = ", ClientKeyExchange"; 618 break; 619 case 20: 620 str_details1 = ", Finished"; 621 break; 622 case 24: 623 str_details1 = ", KeyUpdate"; 624 break; 625 } 626 } 627 } 628 } 629 BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, 630 str_version, str_content_type, (unsigned long) len, 631 str_details1, str_details2); 632 633 if (len > 0) { 634 size_t num, i; 635 636 BIO_printf(bio, " "); 637 num = len; 638 639 for (i = 0; i < num; i++) { 640 if (i % 16 == 0 && i > 0) 641 BIO_printf(bio, "\n "); 642 BIO_printf(bio, " %02x", 643 ((const unsigned char *) buf)[i]); 644 } 645 if (i < len) 646 BIO_printf(bio, " ..."); 647 BIO_printf(bio, "\n"); 648 } 649 (void) BIO_flush(bio); 650 } 651 652 void 653 tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len, 654 void *arg) 655 { 656 BIO *bio = arg; 657 char *extname; 658 659 switch (type) { 660 case TLSEXT_TYPE_server_name: 661 extname = "server name"; 662 break; 663 664 case TLSEXT_TYPE_max_fragment_length: 665 extname = "max fragment length"; 666 break; 667 668 case TLSEXT_TYPE_client_certificate_url: 669 extname = "client certificate URL"; 670 break; 671 672 case TLSEXT_TYPE_trusted_ca_keys: 673 extname = "trusted CA keys"; 674 break; 675 676 case TLSEXT_TYPE_truncated_hmac: 677 extname = "truncated HMAC"; 678 break; 679 680 case TLSEXT_TYPE_status_request: 681 extname = "status request"; 682 break; 683 684 case TLSEXT_TYPE_user_mapping: 685 extname = "user mapping"; 686 break; 687 688 case TLSEXT_TYPE_client_authz: 689 extname = "client authz"; 690 break; 691 692 case TLSEXT_TYPE_server_authz: 693 extname = "server authz"; 694 break; 695 696 case TLSEXT_TYPE_cert_type: 697 extname = "cert type"; 698 break; 699 700 case TLSEXT_TYPE_supported_groups: 701 extname = "supported groups"; 702 break; 703 704 case TLSEXT_TYPE_ec_point_formats: 705 extname = "EC point formats"; 706 break; 707 708 case TLSEXT_TYPE_srp: 709 extname = "SRP"; 710 break; 711 712 case TLSEXT_TYPE_signature_algorithms: 713 extname = "signature algorithms"; 714 break; 715 716 case TLSEXT_TYPE_use_srtp: 717 extname = "use SRTP"; 718 break; 719 720 case TLSEXT_TYPE_heartbeat: 721 extname = "heartbeat"; 722 break; 723 724 case TLSEXT_TYPE_application_layer_protocol_negotiation: 725 extname = "application layer protocol negotiation"; 726 break; 727 728 case TLSEXT_TYPE_padding: 729 extname = "TLS padding"; 730 break; 731 732 case TLSEXT_TYPE_session_ticket: 733 extname = "session ticket"; 734 break; 735 736 #if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL) 737 case TLSEXT_TYPE_pre_shared_key: 738 extname = "pre shared key"; 739 break; 740 741 case TLSEXT_TYPE_early_data: 742 extname = "early data"; 743 break; 744 745 case TLSEXT_TYPE_supported_versions: 746 extname = "supported versions"; 747 break; 748 749 case TLSEXT_TYPE_cookie: 750 extname = "cookie"; 751 break; 752 753 case TLSEXT_TYPE_psk_key_exchange_modes: 754 extname = "PSK key exchange modes"; 755 break; 756 757 case TLSEXT_TYPE_certificate_authorities: 758 extname = "certificate authorities"; 759 break; 760 761 case TLSEXT_TYPE_oid_filters: 762 extname = "OID filters"; 763 break; 764 765 case TLSEXT_TYPE_post_handshake_auth: 766 extname = "post handshake auth"; 767 break; 768 769 case TLSEXT_TYPE_signature_algorithms_cert: 770 extname = "signature algorithms cert"; 771 break; 772 773 case TLSEXT_TYPE_key_share: 774 extname = "key share"; 775 break; 776 #endif 777 778 case TLSEXT_TYPE_renegotiate: 779 extname = "renegotiation info"; 780 break; 781 782 default: 783 extname = "unknown"; 784 break; 785 786 } 787 788 BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n", 789 client_server ? "server" : "client", extname, type, len); 790 BIO_dump(bio, (char *) data, len); 791 (void) BIO_flush(bio); 792 } 793 794 int 795 generate_cookie_callback(SSL * ssl, unsigned char *cookie, 796 unsigned int *cookie_len) 797 { 798 unsigned char *buffer, result[EVP_MAX_MD_SIZE]; 799 unsigned int length, resultlength; 800 union { 801 struct sockaddr sa; 802 struct sockaddr_in s4; 803 struct sockaddr_in6 s6; 804 } peer; 805 806 /* Initialize a random secret */ 807 if (!cookie_initialized) { 808 arc4random_buf(cookie_secret, COOKIE_SECRET_LENGTH); 809 cookie_initialized = 1; 810 } 811 /* Read peer information */ 812 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer); 813 814 /* Create buffer with peer's address and port */ 815 length = 0; 816 switch (peer.sa.sa_family) { 817 case AF_INET: 818 length += sizeof(struct in_addr); 819 length += sizeof(peer.s4.sin_port); 820 break; 821 case AF_INET6: 822 length += sizeof(struct in6_addr); 823 length += sizeof(peer.s6.sin6_port); 824 break; 825 default: 826 OPENSSL_assert(0); 827 break; 828 } 829 buffer = malloc(length); 830 831 if (buffer == NULL) { 832 BIO_printf(bio_err, "out of memory\n"); 833 return 0; 834 } 835 switch (peer.sa.sa_family) { 836 case AF_INET: 837 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port)); 838 memcpy(buffer + sizeof(peer.s4.sin_port), 839 &peer.s4.sin_addr, sizeof(struct in_addr)); 840 break; 841 case AF_INET6: 842 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port)); 843 memcpy(buffer + sizeof(peer.s6.sin6_port), 844 &peer.s6.sin6_addr, sizeof(struct in6_addr)); 845 break; 846 default: 847 OPENSSL_assert(0); 848 break; 849 } 850 851 /* Calculate HMAC of buffer using the secret */ 852 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH, 853 buffer, length, result, &resultlength); 854 free(buffer); 855 856 memcpy(cookie, result, resultlength); 857 *cookie_len = resultlength; 858 859 return 1; 860 } 861 862 int 863 verify_cookie_callback(SSL * ssl, const unsigned char *cookie, 864 unsigned int cookie_len) 865 { 866 unsigned char *buffer, result[EVP_MAX_MD_SIZE]; 867 unsigned int length, resultlength; 868 union { 869 struct sockaddr sa; 870 struct sockaddr_in s4; 871 struct sockaddr_in6 s6; 872 } peer; 873 874 /* If secret isn't initialized yet, the cookie can't be valid */ 875 if (!cookie_initialized) 876 return 0; 877 878 /* Read peer information */ 879 (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer); 880 881 /* Create buffer with peer's address and port */ 882 length = 0; 883 switch (peer.sa.sa_family) { 884 case AF_INET: 885 length += sizeof(struct in_addr); 886 length += sizeof(peer.s4.sin_port); 887 break; 888 case AF_INET6: 889 length += sizeof(struct in6_addr); 890 length += sizeof(peer.s6.sin6_port); 891 break; 892 default: 893 OPENSSL_assert(0); 894 break; 895 } 896 buffer = malloc(length); 897 898 if (buffer == NULL) { 899 BIO_printf(bio_err, "out of memory\n"); 900 return 0; 901 } 902 switch (peer.sa.sa_family) { 903 case AF_INET: 904 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port)); 905 memcpy(buffer + sizeof(peer.s4.sin_port), 906 &peer.s4.sin_addr, sizeof(struct in_addr)); 907 break; 908 case AF_INET6: 909 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port)); 910 memcpy(buffer + sizeof(peer.s6.sin6_port), 911 &peer.s6.sin6_addr, sizeof(struct in6_addr)); 912 break; 913 default: 914 OPENSSL_assert(0); 915 break; 916 } 917 918 /* Calculate HMAC of buffer using the secret */ 919 if (HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH, 920 buffer, length, result, &resultlength) == NULL) { 921 free(buffer); 922 return 0; 923 } 924 925 free(buffer); 926 927 if (cookie_len == resultlength && 928 memcmp(result, cookie, resultlength) == 0) 929 return 1; 930 931 return 0; 932 } 933