1/* 2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved. 3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved 4 * 5 * Licensed under the OpenSSL license (the "License"). You may not use 6 * this file except in compliance with the License. You can obtain a copy 7 * in the file LICENSE in the source distribution or at 8 * https://www.openssl.org/source/license.html 9 */ 10 11#include <stdio.h> 12#include <sys/types.h> 13 14#include "internal/nelem.h" 15#include "internal/o_dir.h" 16#include <openssl/bio.h> 17#include <openssl/pem.h> 18#include <openssl/x509v3.h> 19#include <openssl/dh.h> 20#include <openssl/bn.h> 21#include <openssl/crypto.h> 22#include "internal/refcount.h" 23#include "ssl_local.h" 24#include "ssl_cert_table.h" 25#include "internal/thread_once.h" 26 27static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, 28 int op, int bits, int nid, void *other, 29 void *ex); 30 31static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT; 32static volatile int ssl_x509_store_ctx_idx = -1; 33 34DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init) 35{ 36 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0, 37 "SSL for verify callback", 38 NULL, NULL, NULL); 39 return ssl_x509_store_ctx_idx >= 0; 40} 41 42int SSL_get_ex_data_X509_STORE_CTX_idx(void) 43{ 44 45 if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init)) 46 return -1; 47 return ssl_x509_store_ctx_idx; 48} 49 50CERT *ssl_cert_new(void) 51{ 52 CERT *ret = OPENSSL_zalloc(sizeof(*ret)); 53 54 if (ret == NULL) { 55 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE); 56 return NULL; 57 } 58 59 ret->key = &(ret->pkeys[SSL_PKEY_RSA]); 60 ret->references = 1; 61 ret->sec_cb = ssl_security_default_callback; 62 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL; 63 ret->sec_ex = NULL; 64 ret->lock = CRYPTO_THREAD_lock_new(); 65 if (ret->lock == NULL) { 66 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE); 67 OPENSSL_free(ret); 68 return NULL; 69 } 70 71 return ret; 72} 73 74CERT *ssl_cert_dup(CERT *cert) 75{ 76 CERT *ret = OPENSSL_zalloc(sizeof(*ret)); 77 int i; 78 79 if (ret == NULL) { 80 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); 81 return NULL; 82 } 83 84 ret->references = 1; 85 ret->key = &ret->pkeys[cert->key - cert->pkeys]; 86 ret->lock = CRYPTO_THREAD_lock_new(); 87 if (ret->lock == NULL) { 88 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); 89 OPENSSL_free(ret); 90 return NULL; 91 } 92#ifndef OPENSSL_NO_DH 93 if (cert->dh_tmp != NULL) { 94 ret->dh_tmp = cert->dh_tmp; 95 EVP_PKEY_up_ref(ret->dh_tmp); 96 } 97 ret->dh_tmp_cb = cert->dh_tmp_cb; 98 ret->dh_tmp_auto = cert->dh_tmp_auto; 99#endif 100 101 for (i = 0; i < SSL_PKEY_NUM; i++) { 102 CERT_PKEY *cpk = cert->pkeys + i; 103 CERT_PKEY *rpk = ret->pkeys + i; 104 if (cpk->x509 != NULL) { 105 rpk->x509 = cpk->x509; 106 X509_up_ref(rpk->x509); 107 } 108 109 if (cpk->privatekey != NULL) { 110 rpk->privatekey = cpk->privatekey; 111 EVP_PKEY_up_ref(cpk->privatekey); 112 } 113 114 if (cpk->chain) { 115 rpk->chain = X509_chain_up_ref(cpk->chain); 116 if (!rpk->chain) { 117 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); 118 goto err; 119 } 120 } 121 if (cert->pkeys[i].serverinfo != NULL) { 122 /* Just copy everything. */ 123 ret->pkeys[i].serverinfo = 124 OPENSSL_malloc(cert->pkeys[i].serverinfo_length); 125 if (ret->pkeys[i].serverinfo == NULL) { 126 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); 127 goto err; 128 } 129 ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length; 130 memcpy(ret->pkeys[i].serverinfo, 131 cert->pkeys[i].serverinfo, cert->pkeys[i].serverinfo_length); 132 } 133 } 134 135 /* Configured sigalgs copied across */ 136 if (cert->conf_sigalgs) { 137 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen 138 * sizeof(*cert->conf_sigalgs)); 139 if (ret->conf_sigalgs == NULL) 140 goto err; 141 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, 142 cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs)); 143 ret->conf_sigalgslen = cert->conf_sigalgslen; 144 } else 145 ret->conf_sigalgs = NULL; 146 147 if (cert->client_sigalgs) { 148 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen 149 * sizeof(*cert->client_sigalgs)); 150 if (ret->client_sigalgs == NULL) 151 goto err; 152 memcpy(ret->client_sigalgs, cert->client_sigalgs, 153 cert->client_sigalgslen * sizeof(*cert->client_sigalgs)); 154 ret->client_sigalgslen = cert->client_sigalgslen; 155 } else 156 ret->client_sigalgs = NULL; 157 /* Copy any custom client certificate types */ 158 if (cert->ctype) { 159 ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len); 160 if (ret->ctype == NULL) 161 goto err; 162 ret->ctype_len = cert->ctype_len; 163 } 164 165 ret->cert_flags = cert->cert_flags; 166 167 ret->cert_cb = cert->cert_cb; 168 ret->cert_cb_arg = cert->cert_cb_arg; 169 170 if (cert->verify_store) { 171 X509_STORE_up_ref(cert->verify_store); 172 ret->verify_store = cert->verify_store; 173 } 174 175 if (cert->chain_store) { 176 X509_STORE_up_ref(cert->chain_store); 177 ret->chain_store = cert->chain_store; 178 } 179 180 ret->sec_cb = cert->sec_cb; 181 ret->sec_level = cert->sec_level; 182 ret->sec_ex = cert->sec_ex; 183 184 if (!custom_exts_copy(&ret->custext, &cert->custext)) 185 goto err; 186#ifndef OPENSSL_NO_PSK 187 if (cert->psk_identity_hint) { 188 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint); 189 if (ret->psk_identity_hint == NULL) 190 goto err; 191 } 192#endif 193 return ret; 194 195 err: 196 ssl_cert_free(ret); 197 198 return NULL; 199} 200 201/* Free up and clear all certificates and chains */ 202 203void ssl_cert_clear_certs(CERT *c) 204{ 205 int i; 206 if (c == NULL) 207 return; 208 for (i = 0; i < SSL_PKEY_NUM; i++) { 209 CERT_PKEY *cpk = c->pkeys + i; 210 X509_free(cpk->x509); 211 cpk->x509 = NULL; 212 EVP_PKEY_free(cpk->privatekey); 213 cpk->privatekey = NULL; 214 sk_X509_pop_free(cpk->chain, X509_free); 215 cpk->chain = NULL; 216 OPENSSL_free(cpk->serverinfo); 217 cpk->serverinfo = NULL; 218 cpk->serverinfo_length = 0; 219 } 220} 221 222void ssl_cert_free(CERT *c) 223{ 224 int i; 225 226 if (c == NULL) 227 return; 228 CRYPTO_DOWN_REF(&c->references, &i, c->lock); 229 REF_PRINT_COUNT("CERT", c); 230 if (i > 0) 231 return; 232 REF_ASSERT_ISNT(i < 0); 233 234#ifndef OPENSSL_NO_DH 235 EVP_PKEY_free(c->dh_tmp); 236#endif 237 238 ssl_cert_clear_certs(c); 239 OPENSSL_free(c->conf_sigalgs); 240 OPENSSL_free(c->client_sigalgs); 241 OPENSSL_free(c->ctype); 242 X509_STORE_free(c->verify_store); 243 X509_STORE_free(c->chain_store); 244 custom_exts_free(&c->custext); 245#ifndef OPENSSL_NO_PSK 246 OPENSSL_free(c->psk_identity_hint); 247#endif 248 CRYPTO_THREAD_lock_free(c->lock); 249 OPENSSL_free(c); 250} 251 252int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain) 253{ 254 int i, r; 255 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key; 256 if (!cpk) 257 return 0; 258 for (i = 0; i < sk_X509_num(chain); i++) { 259 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0); 260 if (r != 1) { 261 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r); 262 return 0; 263 } 264 } 265 sk_X509_pop_free(cpk->chain, X509_free); 266 cpk->chain = chain; 267 return 1; 268} 269 270int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain) 271{ 272 STACK_OF(X509) *dchain; 273 if (!chain) 274 return ssl_cert_set0_chain(s, ctx, NULL); 275 dchain = X509_chain_up_ref(chain); 276 if (!dchain) 277 return 0; 278 if (!ssl_cert_set0_chain(s, ctx, dchain)) { 279 sk_X509_pop_free(dchain, X509_free); 280 return 0; 281 } 282 return 1; 283} 284 285int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) 286{ 287 int r; 288 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key; 289 if (!cpk) 290 return 0; 291 r = ssl_security_cert(s, ctx, x, 0, 0); 292 if (r != 1) { 293 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r); 294 return 0; 295 } 296 if (!cpk->chain) 297 cpk->chain = sk_X509_new_null(); 298 if (!cpk->chain || !sk_X509_push(cpk->chain, x)) 299 return 0; 300 return 1; 301} 302 303int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) 304{ 305 if (!ssl_cert_add0_chain_cert(s, ctx, x)) 306 return 0; 307 X509_up_ref(x); 308 return 1; 309} 310 311int ssl_cert_select_current(CERT *c, X509 *x) 312{ 313 int i; 314 if (x == NULL) 315 return 0; 316 for (i = 0; i < SSL_PKEY_NUM; i++) { 317 CERT_PKEY *cpk = c->pkeys + i; 318 if (cpk->x509 == x && cpk->privatekey) { 319 c->key = cpk; 320 return 1; 321 } 322 } 323 324 for (i = 0; i < SSL_PKEY_NUM; i++) { 325 CERT_PKEY *cpk = c->pkeys + i; 326 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) { 327 c->key = cpk; 328 return 1; 329 } 330 } 331 return 0; 332} 333 334int ssl_cert_set_current(CERT *c, long op) 335{ 336 int i, idx; 337 if (!c) 338 return 0; 339 if (op == SSL_CERT_SET_FIRST) 340 idx = 0; 341 else if (op == SSL_CERT_SET_NEXT) { 342 idx = (int)(c->key - c->pkeys + 1); 343 if (idx >= SSL_PKEY_NUM) 344 return 0; 345 } else 346 return 0; 347 for (i = idx; i < SSL_PKEY_NUM; i++) { 348 CERT_PKEY *cpk = c->pkeys + i; 349 if (cpk->x509 && cpk->privatekey) { 350 c->key = cpk; 351 return 1; 352 } 353 } 354 return 0; 355} 356 357void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg) 358{ 359 c->cert_cb = cb; 360 c->cert_cb_arg = arg; 361} 362 363int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) 364{ 365 X509 *x; 366 int i = 0; 367 X509_STORE *verify_store; 368 X509_STORE_CTX *ctx = NULL; 369 X509_VERIFY_PARAM *param; 370 371 if ((sk == NULL) || (sk_X509_num(sk) == 0)) 372 return 0; 373 374 if (s->cert->verify_store) 375 verify_store = s->cert->verify_store; 376 else 377 verify_store = s->ctx->cert_store; 378 379 ctx = X509_STORE_CTX_new(); 380 if (ctx == NULL) { 381 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE); 382 return 0; 383 } 384 385 x = sk_X509_value(sk, 0); 386 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) { 387 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB); 388 goto end; 389 } 390 param = X509_STORE_CTX_get0_param(ctx); 391 /* 392 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some 393 * point, for now a single @SECLEVEL sets the same policy for TLS crypto 394 * and PKI authentication. 395 */ 396 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s)); 397 398 /* Set suite B flags if needed */ 399 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s)); 400 if (!X509_STORE_CTX_set_ex_data 401 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) { 402 goto end; 403 } 404 405 /* Verify via DANE if enabled */ 406 if (DANETLS_ENABLED(&s->dane)) 407 X509_STORE_CTX_set0_dane(ctx, &s->dane); 408 409 /* 410 * We need to inherit the verify parameters. These can be determined by 411 * the context: if its a server it will verify SSL client certificates or 412 * vice versa. 413 */ 414 415 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server"); 416 /* 417 * Anything non-default in "s->param" should overwrite anything in the ctx. 418 */ 419 X509_VERIFY_PARAM_set1(param, s->param); 420 421 if (s->verify_callback) 422 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback); 423 424 if (s->ctx->app_verify_callback != NULL) 425 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg); 426 else 427 i = X509_verify_cert(ctx); 428 429 s->verify_result = X509_STORE_CTX_get_error(ctx); 430 sk_X509_pop_free(s->verified_chain, X509_free); 431 s->verified_chain = NULL; 432 if (X509_STORE_CTX_get0_chain(ctx) != NULL) { 433 s->verified_chain = X509_STORE_CTX_get1_chain(ctx); 434 if (s->verified_chain == NULL) { 435 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE); 436 i = 0; 437 } 438 } 439 440 /* Move peername from the store context params to the SSL handle's */ 441 X509_VERIFY_PARAM_move_peername(s->param, param); 442 443 end: 444 X509_STORE_CTX_free(ctx); 445 return i; 446} 447 448static void set0_CA_list(STACK_OF(X509_NAME) **ca_list, 449 STACK_OF(X509_NAME) *name_list) 450{ 451 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); 452 *ca_list = name_list; 453} 454 455STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) 456{ 457 int i; 458 const int num = sk_X509_NAME_num(sk); 459 STACK_OF(X509_NAME) *ret; 460 X509_NAME *name; 461 462 ret = sk_X509_NAME_new_reserve(NULL, num); 463 if (ret == NULL) { 464 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE); 465 return NULL; 466 } 467 for (i = 0; i < num; i++) { 468 name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); 469 if (name == NULL) { 470 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE); 471 sk_X509_NAME_pop_free(ret, X509_NAME_free); 472 return NULL; 473 } 474 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */ 475 } 476 return ret; 477} 478 479void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 480{ 481 set0_CA_list(&s->ca_names, name_list); 482} 483 484void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 485{ 486 set0_CA_list(&ctx->ca_names, name_list); 487} 488 489const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx) 490{ 491 return ctx->ca_names; 492} 493 494const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s) 495{ 496 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names; 497} 498 499void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 500{ 501 set0_CA_list(&ctx->client_ca_names, name_list); 502} 503 504STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) 505{ 506 return ctx->client_ca_names; 507} 508 509void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 510{ 511 set0_CA_list(&s->client_ca_names, name_list); 512} 513 514const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s) 515{ 516 return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL; 517} 518 519STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s) 520{ 521 if (!s->server) 522 return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL; 523 return s->client_ca_names != NULL ? s->client_ca_names 524 : s->ctx->client_ca_names; 525} 526 527static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x) 528{ 529 X509_NAME *name; 530 531 if (x == NULL) 532 return 0; 533 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL)) 534 return 0; 535 536 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) 537 return 0; 538 539 if (!sk_X509_NAME_push(*sk, name)) { 540 X509_NAME_free(name); 541 return 0; 542 } 543 return 1; 544} 545 546int SSL_add1_to_CA_list(SSL *ssl, const X509 *x) 547{ 548 return add_ca_name(&ssl->ca_names, x); 549} 550 551int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x) 552{ 553 return add_ca_name(&ctx->ca_names, x); 554} 555 556/* 557 * The following two are older names are to be replaced with 558 * SSL(_CTX)_add1_to_CA_list 559 */ 560int SSL_add_client_CA(SSL *ssl, X509 *x) 561{ 562 return add_ca_name(&ssl->client_ca_names, x); 563} 564 565int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) 566{ 567 return add_ca_name(&ctx->client_ca_names, x); 568} 569 570static int xname_cmp(const X509_NAME *a, const X509_NAME *b) 571{ 572 unsigned char *abuf = NULL, *bbuf = NULL; 573 int alen, blen, ret; 574 575 /* X509_NAME_cmp() itself casts away constness in this way, so 576 * assume it's safe: 577 */ 578 alen = i2d_X509_NAME((X509_NAME *)a, &abuf); 579 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf); 580 581 if (alen < 0 || blen < 0) 582 ret = -2; 583 else if (alen != blen) 584 ret = alen - blen; 585 else /* alen == blen */ 586 ret = memcmp(abuf, bbuf, alen); 587 588 OPENSSL_free(abuf); 589 OPENSSL_free(bbuf); 590 591 return ret; 592} 593 594static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 595{ 596 return xname_cmp(*a, *b); 597} 598 599static unsigned long xname_hash(const X509_NAME *a) 600{ 601 return X509_NAME_hash((X509_NAME *)a); 602} 603 604STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) 605{ 606 BIO *in = BIO_new(BIO_s_file()); 607 X509 *x = NULL; 608 X509_NAME *xn = NULL; 609 STACK_OF(X509_NAME) *ret = NULL; 610 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); 611 612 if ((name_hash == NULL) || (in == NULL)) { 613 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); 614 goto err; 615 } 616 617 if (!BIO_read_filename(in, file)) 618 goto err; 619 620 for (;;) { 621 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 622 break; 623 if (ret == NULL) { 624 ret = sk_X509_NAME_new_null(); 625 if (ret == NULL) { 626 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); 627 goto err; 628 } 629 } 630 if ((xn = X509_get_subject_name(x)) == NULL) 631 goto err; 632 /* check for duplicates */ 633 xn = X509_NAME_dup(xn); 634 if (xn == NULL) 635 goto err; 636 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { 637 /* Duplicate. */ 638 X509_NAME_free(xn); 639 xn = NULL; 640 } else { 641 lh_X509_NAME_insert(name_hash, xn); 642 if (!sk_X509_NAME_push(ret, xn)) 643 goto err; 644 } 645 } 646 goto done; 647 648 err: 649 X509_NAME_free(xn); 650 sk_X509_NAME_pop_free(ret, X509_NAME_free); 651 ret = NULL; 652 done: 653 BIO_free(in); 654 X509_free(x); 655 lh_X509_NAME_free(name_hash); 656 if (ret != NULL) 657 ERR_clear_error(); 658 return ret; 659} 660 661int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 662 const char *file) 663{ 664 BIO *in; 665 X509 *x = NULL; 666 X509_NAME *xn = NULL; 667 int ret = 1; 668 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b); 669 670 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); 671 672 in = BIO_new(BIO_s_file()); 673 674 if (in == NULL) { 675 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE); 676 goto err; 677 } 678 679 if (!BIO_read_filename(in, file)) 680 goto err; 681 682 for (;;) { 683 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 684 break; 685 if ((xn = X509_get_subject_name(x)) == NULL) 686 goto err; 687 xn = X509_NAME_dup(xn); 688 if (xn == NULL) 689 goto err; 690 if (sk_X509_NAME_find(stack, xn) >= 0) { 691 /* Duplicate. */ 692 X509_NAME_free(xn); 693 } else if (!sk_X509_NAME_push(stack, xn)) { 694 X509_NAME_free(xn); 695 goto err; 696 } 697 } 698 699 ERR_clear_error(); 700 goto done; 701 702 err: 703 ret = 0; 704 done: 705 BIO_free(in); 706 X509_free(x); 707 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 708 return ret; 709} 710 711int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 712 const char *dir) 713{ 714 OPENSSL_DIR_CTX *d = NULL; 715 const char *filename; 716 int ret = 0; 717 718 /* Note that a side effect is that the CAs will be sorted by name */ 719 720 while ((filename = OPENSSL_DIR_read(&d, dir))) { 721 char buf[1024]; 722 int r; 723 724 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) { 725 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, 726 SSL_R_PATH_TOO_LONG); 727 goto err; 728 } 729#ifdef OPENSSL_SYS_VMS 730 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename); 731#else 732 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename); 733#endif 734 if (r <= 0 || r >= (int)sizeof(buf)) 735 goto err; 736 if (!SSL_add_file_cert_subjects_to_stack(stack, buf)) 737 goto err; 738 } 739 740 if (errno) { 741 SYSerr(SYS_F_OPENDIR, get_last_sys_error()); 742 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')"); 743 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB); 744 goto err; 745 } 746 747 ret = 1; 748 749 err: 750 if (d) 751 OPENSSL_DIR_end(&d); 752 753 return ret; 754} 755 756/* Build a certificate chain for current certificate */ 757int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags) 758{ 759 CERT *c = s ? s->cert : ctx->cert; 760 CERT_PKEY *cpk = c->key; 761 X509_STORE *chain_store = NULL; 762 X509_STORE_CTX *xs_ctx = NULL; 763 STACK_OF(X509) *chain = NULL, *untrusted = NULL; 764 X509 *x; 765 int i, rv = 0; 766 767 if (!cpk->x509) { 768 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET); 769 goto err; 770 } 771 /* Rearranging and check the chain: add everything to a store */ 772 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { 773 chain_store = X509_STORE_new(); 774 if (chain_store == NULL) 775 goto err; 776 for (i = 0; i < sk_X509_num(cpk->chain); i++) { 777 x = sk_X509_value(cpk->chain, i); 778 if (!X509_STORE_add_cert(chain_store, x)) 779 goto err; 780 } 781 /* Add EE cert too: it might be self signed */ 782 if (!X509_STORE_add_cert(chain_store, cpk->x509)) 783 goto err; 784 } else { 785 if (c->chain_store) 786 chain_store = c->chain_store; 787 else if (s) 788 chain_store = s->ctx->cert_store; 789 else 790 chain_store = ctx->cert_store; 791 792 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) 793 untrusted = cpk->chain; 794 } 795 796 xs_ctx = X509_STORE_CTX_new(); 797 if (xs_ctx == NULL) { 798 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE); 799 goto err; 800 } 801 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) { 802 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB); 803 goto err; 804 } 805 /* Set suite B flags if needed */ 806 X509_STORE_CTX_set_flags(xs_ctx, 807 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS); 808 809 i = X509_verify_cert(xs_ctx); 810 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { 811 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) 812 ERR_clear_error(); 813 i = 1; 814 rv = 2; 815 } 816 if (i > 0) 817 chain = X509_STORE_CTX_get1_chain(xs_ctx); 818 if (i <= 0) { 819 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED); 820 i = X509_STORE_CTX_get_error(xs_ctx); 821 ERR_add_error_data(2, "Verify error:", 822 X509_verify_cert_error_string(i)); 823 824 goto err; 825 } 826 /* Remove EE certificate from chain */ 827 x = sk_X509_shift(chain); 828 X509_free(x); 829 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { 830 if (sk_X509_num(chain) > 0) { 831 /* See if last cert is self signed */ 832 x = sk_X509_value(chain, sk_X509_num(chain) - 1); 833 if (X509_get_extension_flags(x) & EXFLAG_SS) { 834 x = sk_X509_pop(chain); 835 X509_free(x); 836 } 837 } 838 } 839 /* 840 * Check security level of all CA certificates: EE will have been checked 841 * already. 842 */ 843 for (i = 0; i < sk_X509_num(chain); i++) { 844 x = sk_X509_value(chain, i); 845 rv = ssl_security_cert(s, ctx, x, 0, 0); 846 if (rv != 1) { 847 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv); 848 sk_X509_pop_free(chain, X509_free); 849 rv = 0; 850 goto err; 851 } 852 } 853 sk_X509_pop_free(cpk->chain, X509_free); 854 cpk->chain = chain; 855 if (rv == 0) 856 rv = 1; 857 err: 858 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) 859 X509_STORE_free(chain_store); 860 X509_STORE_CTX_free(xs_ctx); 861 862 return rv; 863} 864 865int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) 866{ 867 X509_STORE **pstore; 868 if (chain) 869 pstore = &c->chain_store; 870 else 871 pstore = &c->verify_store; 872 X509_STORE_free(*pstore); 873 *pstore = store; 874 if (ref && store) 875 X509_STORE_up_ref(store); 876 return 1; 877} 878 879static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, 880 int op, int bits, int nid, void *other, 881 void *ex) 882{ 883 int level, minbits; 884 static const int minbits_table[5] = { 80, 112, 128, 192, 256 }; 885 if (ctx) 886 level = SSL_CTX_get_security_level(ctx); 887 else 888 level = SSL_get_security_level(s); 889 890 if (level <= 0) { 891 /* 892 * No EDH keys weaker than 1024-bits even at level 0, otherwise, 893 * anything goes. 894 */ 895 if (op == SSL_SECOP_TMP_DH && bits < 80) 896 return 0; 897 return 1; 898 } 899 if (level > 5) 900 level = 5; 901 minbits = minbits_table[level - 1]; 902 switch (op) { 903 case SSL_SECOP_CIPHER_SUPPORTED: 904 case SSL_SECOP_CIPHER_SHARED: 905 case SSL_SECOP_CIPHER_CHECK: 906 { 907 const SSL_CIPHER *c = other; 908 /* No ciphers below security level */ 909 if (bits < minbits) 910 return 0; 911 /* No unauthenticated ciphersuites */ 912 if (c->algorithm_auth & SSL_aNULL) 913 return 0; 914 /* No MD5 mac ciphersuites */ 915 if (c->algorithm_mac & SSL_MD5) 916 return 0; 917 /* SHA1 HMAC is 160 bits of security */ 918 if (minbits > 160 && c->algorithm_mac & SSL_SHA1) 919 return 0; 920 /* Level 2: no RC4 */ 921 if (level >= 2 && c->algorithm_enc == SSL_RC4) 922 return 0; 923 /* Level 3: forward secure ciphersuites only */ 924 if (level >= 3 && c->min_tls != TLS1_3_VERSION && 925 !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH))) 926 return 0; 927 break; 928 } 929 case SSL_SECOP_VERSION: 930 if (!SSL_IS_DTLS(s)) { 931 /* SSLv3 not allowed at level 2 */ 932 if (nid <= SSL3_VERSION && level >= 2) 933 return 0; 934 /* TLS v1.1 and above only for level 3 */ 935 if (nid <= TLS1_VERSION && level >= 3) 936 return 0; 937 /* TLS v1.2 only for level 4 and above */ 938 if (nid <= TLS1_1_VERSION && level >= 4) 939 return 0; 940 } else { 941 /* DTLS v1.2 only for level 4 and above */ 942 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4) 943 return 0; 944 } 945 break; 946 947 case SSL_SECOP_COMPRESSION: 948 if (level >= 2) 949 return 0; 950 break; 951 case SSL_SECOP_TICKET: 952 if (level >= 3) 953 return 0; 954 break; 955 default: 956 if (bits < minbits) 957 return 0; 958 } 959 return 1; 960} 961 962int ssl_security(const SSL *s, int op, int bits, int nid, void *other) 963{ 964 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex); 965} 966 967int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other) 968{ 969 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, 970 ctx->cert->sec_ex); 971} 972 973int ssl_cert_lookup_by_nid(int nid, size_t *pidx) 974{ 975 size_t i; 976 977 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { 978 if (ssl_cert_info[i].nid == nid) { 979 *pidx = i; 980 return 1; 981 } 982 } 983 984 return 0; 985} 986 987const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx) 988{ 989 int nid = EVP_PKEY_id(pk); 990 size_t tmpidx; 991 992 if (nid == NID_undef) 993 return NULL; 994 995 if (!ssl_cert_lookup_by_nid(nid, &tmpidx)) 996 return NULL; 997 998 if (pidx != NULL) 999 *pidx = tmpidx; 1000 1001 return &ssl_cert_info[tmpidx]; 1002} 1003 1004const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx) 1005{ 1006 if (idx >= OSSL_NELEM(ssl_cert_info)) 1007 return NULL; 1008 return &ssl_cert_info[idx]; 1009} 1010