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_locl.h" 24 #include "ssl_cert_table.h" 25 #include "internal/thread_once.h" 26 27 static 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 31 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT; 32 static volatile int ssl_x509_store_ctx_idx = -1; 33 34 DEFINE_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 42 int 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 50 CERT *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 74 CERT *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 */ 202 203 void 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 } 221 222 void 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 } 251 252 int 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 } 269 270 int 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 } 284 285 int 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 } 302 303 int 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 } 310 311 int 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 } 333 334 int 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 } 356 357 void 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 } 362 363 int 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 } 447 448 static 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 } 454 455 STACK_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 } 478 479 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 480 { 481 set0_CA_list(&s->ca_names, name_list); 482 } 483 484 void 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 } 488 489 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx) 490 { 491 return ctx->ca_names; 492 } 493 494 const 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 } 498 499 void 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 } 503 504 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) 505 { 506 return ctx->client_ca_names; 507 } 508 509 void 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 } 513 514 const 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 } 518 519 STACK_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 } 526 527 static 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 } 545 546 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x) 547 { 548 return add_ca_name(&ssl->ca_names, x); 549 } 550 551 int 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 */ 560 int SSL_add_client_CA(SSL *ssl, X509 *x) 561 { 562 return add_ca_name(&ssl->client_ca_names, x); 563 } 564 565 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) 566 { 567 return add_ca_name(&ctx->client_ca_names, x); 568 } 569 570 static 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 } 593 594 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 595 { 596 return xname_cmp(*a, *b); 597 } 598 599 static unsigned long xname_hash(const X509_NAME *a) 600 { 601 return X509_NAME_hash((X509_NAME *)a); 602 } 603 604 /** 605 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed; 606 * it doesn't really have anything to do with clients (except that a common use 607 * for a stack of CAs is to send it to the client). Actually, it doesn't have 608 * much to do with CAs, either, since it will load any old cert. 609 * \param file the file containing one or more certs. 610 * \return a ::STACK containing the certs. 611 */ 612 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) 613 { 614 BIO *in = BIO_new(BIO_s_file()); 615 X509 *x = NULL; 616 X509_NAME *xn = NULL; 617 STACK_OF(X509_NAME) *ret = NULL; 618 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); 619 620 if ((name_hash == NULL) || (in == NULL)) { 621 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); 622 goto err; 623 } 624 625 if (!BIO_read_filename(in, file)) 626 goto err; 627 628 for (;;) { 629 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 630 break; 631 if (ret == NULL) { 632 ret = sk_X509_NAME_new_null(); 633 if (ret == NULL) { 634 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); 635 goto err; 636 } 637 } 638 if ((xn = X509_get_subject_name(x)) == NULL) 639 goto err; 640 /* check for duplicates */ 641 xn = X509_NAME_dup(xn); 642 if (xn == NULL) 643 goto err; 644 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { 645 /* Duplicate. */ 646 X509_NAME_free(xn); 647 xn = NULL; 648 } else { 649 lh_X509_NAME_insert(name_hash, xn); 650 if (!sk_X509_NAME_push(ret, xn)) 651 goto err; 652 } 653 } 654 goto done; 655 656 err: 657 X509_NAME_free(xn); 658 sk_X509_NAME_pop_free(ret, X509_NAME_free); 659 ret = NULL; 660 done: 661 BIO_free(in); 662 X509_free(x); 663 lh_X509_NAME_free(name_hash); 664 if (ret != NULL) 665 ERR_clear_error(); 666 return ret; 667 } 668 669 /** 670 * Add a file of certs to a stack. 671 * \param stack the stack to add to. 672 * \param file the file to add from. All certs in this file that are not 673 * already in the stack will be added. 674 * \return 1 for success, 0 for failure. Note that in the case of failure some 675 * certs may have been added to \c stack. 676 */ 677 678 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 679 const char *file) 680 { 681 BIO *in; 682 X509 *x = NULL; 683 X509_NAME *xn = NULL; 684 int ret = 1; 685 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b); 686 687 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); 688 689 in = BIO_new(BIO_s_file()); 690 691 if (in == NULL) { 692 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE); 693 goto err; 694 } 695 696 if (!BIO_read_filename(in, file)) 697 goto err; 698 699 for (;;) { 700 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 701 break; 702 if ((xn = X509_get_subject_name(x)) == NULL) 703 goto err; 704 xn = X509_NAME_dup(xn); 705 if (xn == NULL) 706 goto err; 707 if (sk_X509_NAME_find(stack, xn) >= 0) { 708 /* Duplicate. */ 709 X509_NAME_free(xn); 710 } else if (!sk_X509_NAME_push(stack, xn)) { 711 X509_NAME_free(xn); 712 goto err; 713 } 714 } 715 716 ERR_clear_error(); 717 goto done; 718 719 err: 720 ret = 0; 721 done: 722 BIO_free(in); 723 X509_free(x); 724 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 725 return ret; 726 } 727 728 /** 729 * Add a directory of certs to a stack. 730 * \param stack the stack to append to. 731 * \param dir the directory to append from. All files in this directory will be 732 * examined as potential certs. Any that are acceptable to 733 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be 734 * included. 735 * \return 1 for success, 0 for failure. Note that in the case of failure some 736 * certs may have been added to \c stack. 737 */ 738 739 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 740 const char *dir) 741 { 742 OPENSSL_DIR_CTX *d = NULL; 743 const char *filename; 744 int ret = 0; 745 746 /* Note that a side effect is that the CAs will be sorted by name */ 747 748 while ((filename = OPENSSL_DIR_read(&d, dir))) { 749 char buf[1024]; 750 int r; 751 752 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) { 753 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, 754 SSL_R_PATH_TOO_LONG); 755 goto err; 756 } 757 #ifdef OPENSSL_SYS_VMS 758 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename); 759 #else 760 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename); 761 #endif 762 if (r <= 0 || r >= (int)sizeof(buf)) 763 goto err; 764 if (!SSL_add_file_cert_subjects_to_stack(stack, buf)) 765 goto err; 766 } 767 768 if (errno) { 769 SYSerr(SYS_F_OPENDIR, get_last_sys_error()); 770 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')"); 771 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB); 772 goto err; 773 } 774 775 ret = 1; 776 777 err: 778 if (d) 779 OPENSSL_DIR_end(&d); 780 781 return ret; 782 } 783 784 /* Build a certificate chain for current certificate */ 785 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags) 786 { 787 CERT *c = s ? s->cert : ctx->cert; 788 CERT_PKEY *cpk = c->key; 789 X509_STORE *chain_store = NULL; 790 X509_STORE_CTX *xs_ctx = NULL; 791 STACK_OF(X509) *chain = NULL, *untrusted = NULL; 792 X509 *x; 793 int i, rv = 0; 794 795 if (!cpk->x509) { 796 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET); 797 goto err; 798 } 799 /* Rearranging and check the chain: add everything to a store */ 800 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { 801 chain_store = X509_STORE_new(); 802 if (chain_store == NULL) 803 goto err; 804 for (i = 0; i < sk_X509_num(cpk->chain); i++) { 805 x = sk_X509_value(cpk->chain, i); 806 if (!X509_STORE_add_cert(chain_store, x)) 807 goto err; 808 } 809 /* Add EE cert too: it might be self signed */ 810 if (!X509_STORE_add_cert(chain_store, cpk->x509)) 811 goto err; 812 } else { 813 if (c->chain_store) 814 chain_store = c->chain_store; 815 else if (s) 816 chain_store = s->ctx->cert_store; 817 else 818 chain_store = ctx->cert_store; 819 820 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) 821 untrusted = cpk->chain; 822 } 823 824 xs_ctx = X509_STORE_CTX_new(); 825 if (xs_ctx == NULL) { 826 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE); 827 goto err; 828 } 829 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) { 830 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB); 831 goto err; 832 } 833 /* Set suite B flags if needed */ 834 X509_STORE_CTX_set_flags(xs_ctx, 835 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS); 836 837 i = X509_verify_cert(xs_ctx); 838 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { 839 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) 840 ERR_clear_error(); 841 i = 1; 842 rv = 2; 843 } 844 if (i > 0) 845 chain = X509_STORE_CTX_get1_chain(xs_ctx); 846 if (i <= 0) { 847 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED); 848 i = X509_STORE_CTX_get_error(xs_ctx); 849 ERR_add_error_data(2, "Verify error:", 850 X509_verify_cert_error_string(i)); 851 852 goto err; 853 } 854 /* Remove EE certificate from chain */ 855 x = sk_X509_shift(chain); 856 X509_free(x); 857 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { 858 if (sk_X509_num(chain) > 0) { 859 /* See if last cert is self signed */ 860 x = sk_X509_value(chain, sk_X509_num(chain) - 1); 861 if (X509_get_extension_flags(x) & EXFLAG_SS) { 862 x = sk_X509_pop(chain); 863 X509_free(x); 864 } 865 } 866 } 867 /* 868 * Check security level of all CA certificates: EE will have been checked 869 * already. 870 */ 871 for (i = 0; i < sk_X509_num(chain); i++) { 872 x = sk_X509_value(chain, i); 873 rv = ssl_security_cert(s, ctx, x, 0, 0); 874 if (rv != 1) { 875 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv); 876 sk_X509_pop_free(chain, X509_free); 877 rv = 0; 878 goto err; 879 } 880 } 881 sk_X509_pop_free(cpk->chain, X509_free); 882 cpk->chain = chain; 883 if (rv == 0) 884 rv = 1; 885 err: 886 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) 887 X509_STORE_free(chain_store); 888 X509_STORE_CTX_free(xs_ctx); 889 890 return rv; 891 } 892 893 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) 894 { 895 X509_STORE **pstore; 896 if (chain) 897 pstore = &c->chain_store; 898 else 899 pstore = &c->verify_store; 900 X509_STORE_free(*pstore); 901 *pstore = store; 902 if (ref && store) 903 X509_STORE_up_ref(store); 904 return 1; 905 } 906 907 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, 908 int op, int bits, int nid, void *other, 909 void *ex) 910 { 911 int level, minbits; 912 static const int minbits_table[5] = { 80, 112, 128, 192, 256 }; 913 if (ctx) 914 level = SSL_CTX_get_security_level(ctx); 915 else 916 level = SSL_get_security_level(s); 917 918 if (level <= 0) { 919 /* 920 * No EDH keys weaker than 1024-bits even at level 0, otherwise, 921 * anything goes. 922 */ 923 if (op == SSL_SECOP_TMP_DH && bits < 80) 924 return 0; 925 return 1; 926 } 927 if (level > 5) 928 level = 5; 929 minbits = minbits_table[level - 1]; 930 switch (op) { 931 case SSL_SECOP_CIPHER_SUPPORTED: 932 case SSL_SECOP_CIPHER_SHARED: 933 case SSL_SECOP_CIPHER_CHECK: 934 { 935 const SSL_CIPHER *c = other; 936 /* No ciphers below security level */ 937 if (bits < minbits) 938 return 0; 939 /* No unauthenticated ciphersuites */ 940 if (c->algorithm_auth & SSL_aNULL) 941 return 0; 942 /* No MD5 mac ciphersuites */ 943 if (c->algorithm_mac & SSL_MD5) 944 return 0; 945 /* SHA1 HMAC is 160 bits of security */ 946 if (minbits > 160 && c->algorithm_mac & SSL_SHA1) 947 return 0; 948 /* Level 2: no RC4 */ 949 if (level >= 2 && c->algorithm_enc == SSL_RC4) 950 return 0; 951 /* Level 3: forward secure ciphersuites only */ 952 if (level >= 3 && c->min_tls != TLS1_3_VERSION && 953 !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH))) 954 return 0; 955 break; 956 } 957 case SSL_SECOP_VERSION: 958 if (!SSL_IS_DTLS(s)) { 959 /* SSLv3 not allowed at level 2 */ 960 if (nid <= SSL3_VERSION && level >= 2) 961 return 0; 962 /* TLS v1.1 and above only for level 3 */ 963 if (nid <= TLS1_VERSION && level >= 3) 964 return 0; 965 /* TLS v1.2 only for level 4 and above */ 966 if (nid <= TLS1_1_VERSION && level >= 4) 967 return 0; 968 } else { 969 /* DTLS v1.2 only for level 4 and above */ 970 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4) 971 return 0; 972 } 973 break; 974 975 case SSL_SECOP_COMPRESSION: 976 if (level >= 2) 977 return 0; 978 break; 979 case SSL_SECOP_TICKET: 980 if (level >= 3) 981 return 0; 982 break; 983 default: 984 if (bits < minbits) 985 return 0; 986 } 987 return 1; 988 } 989 990 int ssl_security(const SSL *s, int op, int bits, int nid, void *other) 991 { 992 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex); 993 } 994 995 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other) 996 { 997 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, 998 ctx->cert->sec_ex); 999 } 1000 1001 int ssl_cert_lookup_by_nid(int nid, size_t *pidx) 1002 { 1003 size_t i; 1004 1005 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { 1006 if (ssl_cert_info[i].nid == nid) { 1007 *pidx = i; 1008 return 1; 1009 } 1010 } 1011 1012 return 0; 1013 } 1014 1015 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx) 1016 { 1017 int nid = EVP_PKEY_id(pk); 1018 size_t tmpidx; 1019 1020 if (nid == NID_undef) 1021 return NULL; 1022 1023 if (!ssl_cert_lookup_by_nid(nid, &tmpidx)) 1024 return NULL; 1025 1026 if (pidx != NULL) 1027 *pidx = tmpidx; 1028 1029 return &ssl_cert_info[tmpidx]; 1030 } 1031 1032 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx) 1033 { 1034 if (idx >= OSSL_NELEM(ssl_cert_info)) 1035 return NULL; 1036 return &ssl_cert_info[idx]; 1037 } 1038