1 /* 2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved. 3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved 4 * 5 * Licensed under the Apache License 2.0 (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/store.h> 19 #include <openssl/x509v3.h> 20 #include <openssl/dh.h> 21 #include <openssl/bn.h> 22 #include <openssl/crypto.h> 23 #include "internal/refcount.h" 24 #include "ssl_local.h" 25 #include "ssl_cert_table.h" 26 #include "internal/thread_once.h" 27 28 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, 29 int op, int bits, int nid, void *other, 30 void *ex); 31 32 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT; 33 static volatile int ssl_x509_store_ctx_idx = -1; 34 35 DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init) 36 { 37 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0, 38 "SSL for verify callback", 39 NULL, NULL, NULL); 40 return ssl_x509_store_ctx_idx >= 0; 41 } 42 43 int SSL_get_ex_data_X509_STORE_CTX_idx(void) 44 { 45 46 if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init)) 47 return -1; 48 return ssl_x509_store_ctx_idx; 49 } 50 51 CERT *ssl_cert_new(void) 52 { 53 CERT *ret = OPENSSL_zalloc(sizeof(*ret)); 54 55 if (ret == NULL) { 56 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 57 return NULL; 58 } 59 60 ret->key = &(ret->pkeys[SSL_PKEY_RSA]); 61 ret->references = 1; 62 ret->sec_cb = ssl_security_default_callback; 63 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL; 64 ret->sec_ex = NULL; 65 ret->lock = CRYPTO_THREAD_lock_new(); 66 if (ret->lock == NULL) { 67 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 68 OPENSSL_free(ret); 69 return NULL; 70 } 71 72 return ret; 73 } 74 75 CERT *ssl_cert_dup(CERT *cert) 76 { 77 CERT *ret = OPENSSL_zalloc(sizeof(*ret)); 78 int i; 79 80 if (ret == NULL) { 81 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 82 return NULL; 83 } 84 85 ret->references = 1; 86 ret->key = &ret->pkeys[cert->key - cert->pkeys]; 87 ret->lock = CRYPTO_THREAD_lock_new(); 88 if (ret->lock == NULL) { 89 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 90 OPENSSL_free(ret); 91 return NULL; 92 } 93 94 if (cert->dh_tmp != NULL) { 95 ret->dh_tmp = cert->dh_tmp; 96 EVP_PKEY_up_ref(ret->dh_tmp); 97 } 98 99 ret->dh_tmp_cb = cert->dh_tmp_cb; 100 ret->dh_tmp_auto = cert->dh_tmp_auto; 101 102 for (i = 0; i < SSL_PKEY_NUM; i++) { 103 CERT_PKEY *cpk = cert->pkeys + i; 104 CERT_PKEY *rpk = ret->pkeys + i; 105 if (cpk->x509 != NULL) { 106 rpk->x509 = cpk->x509; 107 X509_up_ref(rpk->x509); 108 } 109 110 if (cpk->privatekey != NULL) { 111 rpk->privatekey = cpk->privatekey; 112 EVP_PKEY_up_ref(cpk->privatekey); 113 } 114 115 if (cpk->chain) { 116 rpk->chain = X509_chain_up_ref(cpk->chain); 117 if (!rpk->chain) { 118 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 119 goto err; 120 } 121 } 122 if (cert->pkeys[i].serverinfo != NULL) { 123 /* Just copy everything. */ 124 ret->pkeys[i].serverinfo = 125 OPENSSL_malloc(cert->pkeys[i].serverinfo_length); 126 if (ret->pkeys[i].serverinfo == NULL) { 127 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 128 goto err; 129 } 130 ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length; 131 memcpy(ret->pkeys[i].serverinfo, 132 cert->pkeys[i].serverinfo, cert->pkeys[i].serverinfo_length); 133 } 134 } 135 136 /* Configured sigalgs copied across */ 137 if (cert->conf_sigalgs) { 138 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen 139 * sizeof(*cert->conf_sigalgs)); 140 if (ret->conf_sigalgs == NULL) 141 goto err; 142 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, 143 cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs)); 144 ret->conf_sigalgslen = cert->conf_sigalgslen; 145 } else 146 ret->conf_sigalgs = NULL; 147 148 if (cert->client_sigalgs) { 149 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen 150 * sizeof(*cert->client_sigalgs)); 151 if (ret->client_sigalgs == NULL) 152 goto err; 153 memcpy(ret->client_sigalgs, cert->client_sigalgs, 154 cert->client_sigalgslen * sizeof(*cert->client_sigalgs)); 155 ret->client_sigalgslen = cert->client_sigalgslen; 156 } else 157 ret->client_sigalgs = NULL; 158 /* Copy any custom client certificate types */ 159 if (cert->ctype) { 160 ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len); 161 if (ret->ctype == NULL) 162 goto err; 163 ret->ctype_len = cert->ctype_len; 164 } 165 166 ret->cert_flags = cert->cert_flags; 167 168 ret->cert_cb = cert->cert_cb; 169 ret->cert_cb_arg = cert->cert_cb_arg; 170 171 if (cert->verify_store) { 172 X509_STORE_up_ref(cert->verify_store); 173 ret->verify_store = cert->verify_store; 174 } 175 176 if (cert->chain_store) { 177 X509_STORE_up_ref(cert->chain_store); 178 ret->chain_store = cert->chain_store; 179 } 180 181 ret->sec_cb = cert->sec_cb; 182 ret->sec_level = cert->sec_level; 183 ret->sec_ex = cert->sec_ex; 184 185 if (!custom_exts_copy(&ret->custext, &cert->custext)) 186 goto err; 187 #ifndef OPENSSL_NO_PSK 188 if (cert->psk_identity_hint) { 189 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint); 190 if (ret->psk_identity_hint == NULL) 191 goto err; 192 } 193 #endif 194 return ret; 195 196 err: 197 ssl_cert_free(ret); 198 199 return NULL; 200 } 201 202 /* Free up and clear all certificates and chains */ 203 204 void ssl_cert_clear_certs(CERT *c) 205 { 206 int i; 207 if (c == NULL) 208 return; 209 for (i = 0; i < SSL_PKEY_NUM; i++) { 210 CERT_PKEY *cpk = c->pkeys + i; 211 X509_free(cpk->x509); 212 cpk->x509 = NULL; 213 EVP_PKEY_free(cpk->privatekey); 214 cpk->privatekey = NULL; 215 sk_X509_pop_free(cpk->chain, X509_free); 216 cpk->chain = NULL; 217 OPENSSL_free(cpk->serverinfo); 218 cpk->serverinfo = NULL; 219 cpk->serverinfo_length = 0; 220 } 221 } 222 223 void ssl_cert_free(CERT *c) 224 { 225 int i; 226 227 if (c == NULL) 228 return; 229 CRYPTO_DOWN_REF(&c->references, &i, c->lock); 230 REF_PRINT_COUNT("CERT", c); 231 if (i > 0) 232 return; 233 REF_ASSERT_ISNT(i < 0); 234 235 EVP_PKEY_free(c->dh_tmp); 236 237 ssl_cert_clear_certs(c); 238 OPENSSL_free(c->conf_sigalgs); 239 OPENSSL_free(c->client_sigalgs); 240 OPENSSL_free(c->ctype); 241 X509_STORE_free(c->verify_store); 242 X509_STORE_free(c->chain_store); 243 custom_exts_free(&c->custext); 244 #ifndef OPENSSL_NO_PSK 245 OPENSSL_free(c->psk_identity_hint); 246 #endif 247 CRYPTO_THREAD_lock_free(c->lock); 248 OPENSSL_free(c); 249 } 250 251 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain) 252 { 253 int i, r; 254 CERT_PKEY *cpk = s != NULL ? s->cert->key : ctx->cert->key; 255 256 if (!cpk) 257 return 0; 258 for (i = 0; i < sk_X509_num(chain); i++) { 259 X509 *x = sk_X509_value(chain, i); 260 261 r = ssl_security_cert(s, ctx, x, 0, 0); 262 if (r != 1) { 263 ERR_raise(ERR_LIB_SSL, r); 264 return 0; 265 } 266 } 267 sk_X509_pop_free(cpk->chain, X509_free); 268 cpk->chain = chain; 269 return 1; 270 } 271 272 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain) 273 { 274 STACK_OF(X509) *dchain; 275 if (!chain) 276 return ssl_cert_set0_chain(s, ctx, NULL); 277 dchain = X509_chain_up_ref(chain); 278 if (!dchain) 279 return 0; 280 if (!ssl_cert_set0_chain(s, ctx, dchain)) { 281 sk_X509_pop_free(dchain, X509_free); 282 return 0; 283 } 284 return 1; 285 } 286 287 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) 288 { 289 int r; 290 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key; 291 if (!cpk) 292 return 0; 293 r = ssl_security_cert(s, ctx, x, 0, 0); 294 if (r != 1) { 295 ERR_raise(ERR_LIB_SSL, r); 296 return 0; 297 } 298 if (!cpk->chain) 299 cpk->chain = sk_X509_new_null(); 300 if (!cpk->chain || !sk_X509_push(cpk->chain, x)) 301 return 0; 302 return 1; 303 } 304 305 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) 306 { 307 if (!ssl_cert_add0_chain_cert(s, ctx, x)) 308 return 0; 309 X509_up_ref(x); 310 return 1; 311 } 312 313 int ssl_cert_select_current(CERT *c, X509 *x) 314 { 315 int i; 316 if (x == NULL) 317 return 0; 318 for (i = 0; i < SSL_PKEY_NUM; i++) { 319 CERT_PKEY *cpk = c->pkeys + i; 320 if (cpk->x509 == x && cpk->privatekey) { 321 c->key = cpk; 322 return 1; 323 } 324 } 325 326 for (i = 0; i < SSL_PKEY_NUM; i++) { 327 CERT_PKEY *cpk = c->pkeys + i; 328 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) { 329 c->key = cpk; 330 return 1; 331 } 332 } 333 return 0; 334 } 335 336 int ssl_cert_set_current(CERT *c, long op) 337 { 338 int i, idx; 339 if (!c) 340 return 0; 341 if (op == SSL_CERT_SET_FIRST) 342 idx = 0; 343 else if (op == SSL_CERT_SET_NEXT) { 344 idx = (int)(c->key - c->pkeys + 1); 345 if (idx >= SSL_PKEY_NUM) 346 return 0; 347 } else 348 return 0; 349 for (i = idx; i < SSL_PKEY_NUM; i++) { 350 CERT_PKEY *cpk = c->pkeys + i; 351 if (cpk->x509 && cpk->privatekey) { 352 c->key = cpk; 353 return 1; 354 } 355 } 356 return 0; 357 } 358 359 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg) 360 { 361 c->cert_cb = cb; 362 c->cert_cb_arg = arg; 363 } 364 365 /* 366 * Verify a certificate chain 367 * Return codes: 368 * 1: Verify success 369 * 0: Verify failure or error 370 * -1: Retry required 371 */ 372 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) 373 { 374 X509 *x; 375 int i = 0; 376 X509_STORE *verify_store; 377 X509_STORE_CTX *ctx = NULL; 378 X509_VERIFY_PARAM *param; 379 380 if ((sk == NULL) || (sk_X509_num(sk) == 0)) 381 return 0; 382 383 if (s->cert->verify_store) 384 verify_store = s->cert->verify_store; 385 else 386 verify_store = s->ctx->cert_store; 387 388 ctx = X509_STORE_CTX_new_ex(s->ctx->libctx, s->ctx->propq); 389 if (ctx == NULL) { 390 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 391 return 0; 392 } 393 394 x = sk_X509_value(sk, 0); 395 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) { 396 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); 397 goto end; 398 } 399 param = X509_STORE_CTX_get0_param(ctx); 400 /* 401 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some 402 * point, for now a single @SECLEVEL sets the same policy for TLS crypto 403 * and PKI authentication. 404 */ 405 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s)); 406 407 /* Set suite B flags if needed */ 408 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s)); 409 if (!X509_STORE_CTX_set_ex_data 410 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) { 411 goto end; 412 } 413 414 /* Verify via DANE if enabled */ 415 if (DANETLS_ENABLED(&s->dane)) 416 X509_STORE_CTX_set0_dane(ctx, &s->dane); 417 418 /* 419 * We need to inherit the verify parameters. These can be determined by 420 * the context: if its a server it will verify SSL client certificates or 421 * vice versa. 422 */ 423 424 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server"); 425 /* 426 * Anything non-default in "s->param" should overwrite anything in the ctx. 427 */ 428 X509_VERIFY_PARAM_set1(param, s->param); 429 430 if (s->verify_callback) 431 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback); 432 433 if (s->ctx->app_verify_callback != NULL) { 434 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg); 435 } else { 436 i = X509_verify_cert(ctx); 437 /* We treat an error in the same way as a failure to verify */ 438 if (i < 0) 439 i = 0; 440 } 441 442 s->verify_result = X509_STORE_CTX_get_error(ctx); 443 sk_X509_pop_free(s->verified_chain, X509_free); 444 s->verified_chain = NULL; 445 if (X509_STORE_CTX_get0_chain(ctx) != NULL) { 446 s->verified_chain = X509_STORE_CTX_get1_chain(ctx); 447 if (s->verified_chain == NULL) { 448 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 449 i = 0; 450 } 451 } 452 453 /* Move peername from the store context params to the SSL handle's */ 454 X509_VERIFY_PARAM_move_peername(s->param, param); 455 456 end: 457 X509_STORE_CTX_free(ctx); 458 return i; 459 } 460 461 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list, 462 STACK_OF(X509_NAME) *name_list) 463 { 464 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); 465 *ca_list = name_list; 466 } 467 468 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) 469 { 470 int i; 471 const int num = sk_X509_NAME_num(sk); 472 STACK_OF(X509_NAME) *ret; 473 X509_NAME *name; 474 475 ret = sk_X509_NAME_new_reserve(NULL, num); 476 if (ret == NULL) { 477 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 478 return NULL; 479 } 480 for (i = 0; i < num; i++) { 481 name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); 482 if (name == NULL) { 483 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 484 sk_X509_NAME_pop_free(ret, X509_NAME_free); 485 return NULL; 486 } 487 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */ 488 } 489 return ret; 490 } 491 492 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 493 { 494 set0_CA_list(&s->ca_names, name_list); 495 } 496 497 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 498 { 499 set0_CA_list(&ctx->ca_names, name_list); 500 } 501 502 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx) 503 { 504 return ctx->ca_names; 505 } 506 507 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s) 508 { 509 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names; 510 } 511 512 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 513 { 514 set0_CA_list(&ctx->client_ca_names, name_list); 515 } 516 517 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) 518 { 519 return ctx->client_ca_names; 520 } 521 522 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 523 { 524 set0_CA_list(&s->client_ca_names, name_list); 525 } 526 527 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s) 528 { 529 return s->s3.tmp.peer_ca_names; 530 } 531 532 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s) 533 { 534 if (!s->server) 535 return s->s3.tmp.peer_ca_names; 536 return s->client_ca_names != NULL ? s->client_ca_names 537 : s->ctx->client_ca_names; 538 } 539 540 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x) 541 { 542 X509_NAME *name; 543 544 if (x == NULL) 545 return 0; 546 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL)) 547 return 0; 548 549 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) 550 return 0; 551 552 if (!sk_X509_NAME_push(*sk, name)) { 553 X509_NAME_free(name); 554 return 0; 555 } 556 return 1; 557 } 558 559 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x) 560 { 561 return add_ca_name(&ssl->ca_names, x); 562 } 563 564 int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x) 565 { 566 return add_ca_name(&ctx->ca_names, x); 567 } 568 569 /* 570 * The following two are older names are to be replaced with 571 * SSL(_CTX)_add1_to_CA_list 572 */ 573 int SSL_add_client_CA(SSL *ssl, X509 *x) 574 { 575 return add_ca_name(&ssl->client_ca_names, x); 576 } 577 578 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) 579 { 580 return add_ca_name(&ctx->client_ca_names, x); 581 } 582 583 static int xname_cmp(const X509_NAME *a, const X509_NAME *b) 584 { 585 unsigned char *abuf = NULL, *bbuf = NULL; 586 int alen, blen, ret; 587 588 /* X509_NAME_cmp() itself casts away constness in this way, so 589 * assume it's safe: 590 */ 591 alen = i2d_X509_NAME((X509_NAME *)a, &abuf); 592 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf); 593 594 if (alen < 0 || blen < 0) 595 ret = -2; 596 else if (alen != blen) 597 ret = alen - blen; 598 else /* alen == blen */ 599 ret = memcmp(abuf, bbuf, alen); 600 601 OPENSSL_free(abuf); 602 OPENSSL_free(bbuf); 603 604 return ret; 605 } 606 607 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 608 { 609 return xname_cmp(*a, *b); 610 } 611 612 static unsigned long xname_hash(const X509_NAME *a) 613 { 614 /* This returns 0 also if SHA1 is not available */ 615 return X509_NAME_hash_ex((X509_NAME *)a, NULL, NULL, NULL); 616 } 617 618 STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file, 619 OSSL_LIB_CTX *libctx, 620 const char *propq) 621 { 622 BIO *in = BIO_new(BIO_s_file()); 623 X509 *x = NULL; 624 X509_NAME *xn = NULL; 625 STACK_OF(X509_NAME) *ret = NULL; 626 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); 627 OSSL_LIB_CTX *prev_libctx = NULL; 628 629 if ((name_hash == NULL) || (in == NULL)) { 630 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 631 goto err; 632 } 633 634 x = X509_new_ex(libctx, propq); 635 if (x == NULL) { 636 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 637 goto err; 638 } 639 if (BIO_read_filename(in, file) <= 0) 640 goto err; 641 642 /* Internally lh_X509_NAME_retrieve() needs the libctx to retrieve SHA1 */ 643 prev_libctx = OSSL_LIB_CTX_set0_default(libctx); 644 for (;;) { 645 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 646 break; 647 if (ret == NULL) { 648 ret = sk_X509_NAME_new_null(); 649 if (ret == NULL) { 650 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 651 goto err; 652 } 653 } 654 if ((xn = X509_get_subject_name(x)) == NULL) 655 goto err; 656 /* check for duplicates */ 657 xn = X509_NAME_dup(xn); 658 if (xn == NULL) 659 goto err; 660 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { 661 /* Duplicate. */ 662 X509_NAME_free(xn); 663 xn = NULL; 664 } else { 665 lh_X509_NAME_insert(name_hash, xn); 666 if (!sk_X509_NAME_push(ret, xn)) 667 goto err; 668 } 669 } 670 goto done; 671 672 err: 673 X509_NAME_free(xn); 674 sk_X509_NAME_pop_free(ret, X509_NAME_free); 675 ret = NULL; 676 done: 677 /* restore the old libctx */ 678 OSSL_LIB_CTX_set0_default(prev_libctx); 679 BIO_free(in); 680 X509_free(x); 681 lh_X509_NAME_free(name_hash); 682 if (ret != NULL) 683 ERR_clear_error(); 684 return ret; 685 } 686 687 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) 688 { 689 return SSL_load_client_CA_file_ex(file, NULL, NULL); 690 } 691 692 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 693 const char *file) 694 { 695 BIO *in; 696 X509 *x = NULL; 697 X509_NAME *xn = NULL; 698 int ret = 1; 699 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b); 700 701 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); 702 703 in = BIO_new(BIO_s_file()); 704 705 if (in == NULL) { 706 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 707 goto err; 708 } 709 710 if (BIO_read_filename(in, file) <= 0) 711 goto err; 712 713 for (;;) { 714 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 715 break; 716 if ((xn = X509_get_subject_name(x)) == NULL) 717 goto err; 718 xn = X509_NAME_dup(xn); 719 if (xn == NULL) 720 goto err; 721 if (sk_X509_NAME_find(stack, xn) >= 0) { 722 /* Duplicate. */ 723 X509_NAME_free(xn); 724 } else if (!sk_X509_NAME_push(stack, xn)) { 725 X509_NAME_free(xn); 726 goto err; 727 } 728 } 729 730 ERR_clear_error(); 731 goto done; 732 733 err: 734 ret = 0; 735 done: 736 BIO_free(in); 737 X509_free(x); 738 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 739 return ret; 740 } 741 742 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 743 const char *dir) 744 { 745 OPENSSL_DIR_CTX *d = NULL; 746 const char *filename; 747 int ret = 0; 748 749 /* Note that a side effect is that the CAs will be sorted by name */ 750 751 while ((filename = OPENSSL_DIR_read(&d, dir))) { 752 char buf[1024]; 753 int r; 754 755 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) { 756 ERR_raise(ERR_LIB_SSL, SSL_R_PATH_TOO_LONG); 757 goto err; 758 } 759 #ifdef OPENSSL_SYS_VMS 760 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename); 761 #else 762 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename); 763 #endif 764 if (r <= 0 || r >= (int)sizeof(buf)) 765 goto err; 766 if (!SSL_add_file_cert_subjects_to_stack(stack, buf)) 767 goto err; 768 } 769 770 if (errno) { 771 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(), 772 "calling OPENSSL_dir_read(%s)", dir); 773 ERR_raise(ERR_LIB_SSL, ERR_R_SYS_LIB); 774 goto err; 775 } 776 777 ret = 1; 778 779 err: 780 if (d) 781 OPENSSL_DIR_end(&d); 782 783 return ret; 784 } 785 786 static int add_uris_recursive(STACK_OF(X509_NAME) *stack, 787 const char *uri, int depth) 788 { 789 int ok = 1; 790 OSSL_STORE_CTX *ctx = NULL; 791 X509 *x = NULL; 792 X509_NAME *xn = NULL; 793 794 if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL) 795 goto err; 796 797 while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) { 798 OSSL_STORE_INFO *info = OSSL_STORE_load(ctx); 799 int infotype = info == 0 ? 0 : OSSL_STORE_INFO_get_type(info); 800 801 if (info == NULL) 802 continue; 803 804 if (infotype == OSSL_STORE_INFO_NAME) { 805 /* 806 * This is an entry in the "directory" represented by the current 807 * uri. if |depth| allows, dive into it. 808 */ 809 if (depth > 0) 810 ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info), 811 depth - 1); 812 } else if (infotype == OSSL_STORE_INFO_CERT) { 813 if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL 814 || (xn = X509_get_subject_name(x)) == NULL 815 || (xn = X509_NAME_dup(xn)) == NULL) 816 goto err; 817 if (sk_X509_NAME_find(stack, xn) >= 0) { 818 /* Duplicate. */ 819 X509_NAME_free(xn); 820 } else if (!sk_X509_NAME_push(stack, xn)) { 821 X509_NAME_free(xn); 822 goto err; 823 } 824 } 825 826 OSSL_STORE_INFO_free(info); 827 } 828 829 ERR_clear_error(); 830 goto done; 831 832 err: 833 ok = 0; 834 done: 835 OSSL_STORE_close(ctx); 836 837 return ok; 838 } 839 840 int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 841 const char *store) 842 { 843 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b) 844 = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); 845 int ret = add_uris_recursive(stack, store, 1); 846 847 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 848 return ret; 849 } 850 851 /* Build a certificate chain for current certificate */ 852 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags) 853 { 854 CERT *c = s ? s->cert : ctx->cert; 855 CERT_PKEY *cpk = c->key; 856 X509_STORE *chain_store = NULL; 857 X509_STORE_CTX *xs_ctx = NULL; 858 STACK_OF(X509) *chain = NULL, *untrusted = NULL; 859 X509 *x; 860 SSL_CTX *real_ctx = (s == NULL) ? ctx : s->ctx; 861 int i, rv = 0; 862 863 if (!cpk->x509) { 864 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_SET); 865 goto err; 866 } 867 /* Rearranging and check the chain: add everything to a store */ 868 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { 869 chain_store = X509_STORE_new(); 870 if (chain_store == NULL) 871 goto err; 872 for (i = 0; i < sk_X509_num(cpk->chain); i++) { 873 x = sk_X509_value(cpk->chain, i); 874 if (!X509_STORE_add_cert(chain_store, x)) 875 goto err; 876 } 877 /* Add EE cert too: it might be self signed */ 878 if (!X509_STORE_add_cert(chain_store, cpk->x509)) 879 goto err; 880 } else { 881 if (c->chain_store) 882 chain_store = c->chain_store; 883 else if (s) 884 chain_store = s->ctx->cert_store; 885 else 886 chain_store = ctx->cert_store; 887 888 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) 889 untrusted = cpk->chain; 890 } 891 892 xs_ctx = X509_STORE_CTX_new_ex(real_ctx->libctx, real_ctx->propq); 893 if (xs_ctx == NULL) { 894 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 895 goto err; 896 } 897 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) { 898 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); 899 goto err; 900 } 901 /* Set suite B flags if needed */ 902 X509_STORE_CTX_set_flags(xs_ctx, 903 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS); 904 905 i = X509_verify_cert(xs_ctx); 906 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { 907 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) 908 ERR_clear_error(); 909 i = 1; 910 rv = 2; 911 } 912 if (i > 0) 913 chain = X509_STORE_CTX_get1_chain(xs_ctx); 914 if (i <= 0) { 915 i = X509_STORE_CTX_get_error(xs_ctx); 916 ERR_raise_data(ERR_LIB_SSL, SSL_R_CERTIFICATE_VERIFY_FAILED, 917 "Verify error:%s", X509_verify_cert_error_string(i)); 918 919 goto err; 920 } 921 /* Remove EE certificate from chain */ 922 x = sk_X509_shift(chain); 923 X509_free(x); 924 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { 925 if (sk_X509_num(chain) > 0) { 926 /* See if last cert is self signed */ 927 x = sk_X509_value(chain, sk_X509_num(chain) - 1); 928 if (X509_get_extension_flags(x) & EXFLAG_SS) { 929 x = sk_X509_pop(chain); 930 X509_free(x); 931 } 932 } 933 } 934 /* 935 * Check security level of all CA certificates: EE will have been checked 936 * already. 937 */ 938 for (i = 0; i < sk_X509_num(chain); i++) { 939 x = sk_X509_value(chain, i); 940 rv = ssl_security_cert(s, ctx, x, 0, 0); 941 if (rv != 1) { 942 ERR_raise(ERR_LIB_SSL, rv); 943 sk_X509_pop_free(chain, X509_free); 944 rv = 0; 945 goto err; 946 } 947 } 948 sk_X509_pop_free(cpk->chain, X509_free); 949 cpk->chain = chain; 950 if (rv == 0) 951 rv = 1; 952 err: 953 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) 954 X509_STORE_free(chain_store); 955 X509_STORE_CTX_free(xs_ctx); 956 957 return rv; 958 } 959 960 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) 961 { 962 X509_STORE **pstore; 963 if (chain) 964 pstore = &c->chain_store; 965 else 966 pstore = &c->verify_store; 967 X509_STORE_free(*pstore); 968 *pstore = store; 969 if (ref && store) 970 X509_STORE_up_ref(store); 971 return 1; 972 } 973 974 int ssl_cert_get_cert_store(CERT *c, X509_STORE **pstore, int chain) 975 { 976 *pstore = (chain ? c->chain_store : c->verify_store); 977 return 1; 978 } 979 980 int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp) 981 { 982 int level; 983 /* 984 * note that there's a corresponding minbits_table 985 * in crypto/x509/x509_vfy.c that's used for checking the security level 986 * of RSA and DSA keys 987 */ 988 static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 }; 989 990 if (ctx != NULL) 991 level = SSL_CTX_get_security_level(ctx); 992 else 993 level = SSL_get_security_level(s); 994 995 if (level > 5) 996 level = 5; 997 else if (level < 0) 998 level = 0; 999 1000 if (levelp != NULL) 1001 *levelp = level; 1002 1003 return minbits_table[level]; 1004 } 1005 1006 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, 1007 int op, int bits, int nid, void *other, 1008 void *ex) 1009 { 1010 int level, minbits, pfs_mask; 1011 1012 minbits = ssl_get_security_level_bits(s, ctx, &level); 1013 1014 if (level == 0) { 1015 /* 1016 * No EDH keys weaker than 1024-bits even at level 0, otherwise, 1017 * anything goes. 1018 */ 1019 if (op == SSL_SECOP_TMP_DH && bits < 80) 1020 return 0; 1021 return 1; 1022 } 1023 switch (op) { 1024 case SSL_SECOP_CIPHER_SUPPORTED: 1025 case SSL_SECOP_CIPHER_SHARED: 1026 case SSL_SECOP_CIPHER_CHECK: 1027 { 1028 const SSL_CIPHER *c = other; 1029 /* No ciphers below security level */ 1030 if (bits < minbits) 1031 return 0; 1032 /* No unauthenticated ciphersuites */ 1033 if (c->algorithm_auth & SSL_aNULL) 1034 return 0; 1035 /* No MD5 mac ciphersuites */ 1036 if (c->algorithm_mac & SSL_MD5) 1037 return 0; 1038 /* SHA1 HMAC is 160 bits of security */ 1039 if (minbits > 160 && c->algorithm_mac & SSL_SHA1) 1040 return 0; 1041 /* Level 2: no RC4 */ 1042 if (level >= 2 && c->algorithm_enc == SSL_RC4) 1043 return 0; 1044 /* Level 3: forward secure ciphersuites only */ 1045 pfs_mask = SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK; 1046 if (level >= 3 && c->min_tls != TLS1_3_VERSION && 1047 !(c->algorithm_mkey & pfs_mask)) 1048 return 0; 1049 break; 1050 } 1051 case SSL_SECOP_VERSION: 1052 if (!SSL_IS_DTLS(s)) { 1053 /* SSLv3 not allowed at level 2 */ 1054 if (nid <= SSL3_VERSION && level >= 2) 1055 return 0; 1056 /* TLS v1.1 and above only for level 3 */ 1057 if (nid <= TLS1_VERSION && level >= 3) 1058 return 0; 1059 /* TLS v1.2 only for level 4 and above */ 1060 if (nid <= TLS1_1_VERSION && level >= 4) 1061 return 0; 1062 } else { 1063 /* DTLS v1.2 only for level 4 and above */ 1064 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4) 1065 return 0; 1066 } 1067 break; 1068 1069 case SSL_SECOP_COMPRESSION: 1070 if (level >= 2) 1071 return 0; 1072 break; 1073 case SSL_SECOP_TICKET: 1074 if (level >= 3) 1075 return 0; 1076 break; 1077 default: 1078 if (bits < minbits) 1079 return 0; 1080 } 1081 return 1; 1082 } 1083 1084 int ssl_security(const SSL *s, int op, int bits, int nid, void *other) 1085 { 1086 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex); 1087 } 1088 1089 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other) 1090 { 1091 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, 1092 ctx->cert->sec_ex); 1093 } 1094 1095 int ssl_cert_lookup_by_nid(int nid, size_t *pidx) 1096 { 1097 size_t i; 1098 1099 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { 1100 if (ssl_cert_info[i].nid == nid) { 1101 *pidx = i; 1102 return 1; 1103 } 1104 } 1105 1106 return 0; 1107 } 1108 1109 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx) 1110 { 1111 size_t i; 1112 1113 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { 1114 const SSL_CERT_LOOKUP *tmp_lu = &ssl_cert_info[i]; 1115 1116 if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid)) 1117 || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) { 1118 if (pidx != NULL) 1119 *pidx = i; 1120 return tmp_lu; 1121 } 1122 } 1123 1124 return NULL; 1125 } 1126 1127 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx) 1128 { 1129 if (idx >= OSSL_NELEM(ssl_cert_info)) 1130 return NULL; 1131 return &ssl_cert_info[idx]; 1132 } 1133