1 /* 2 * Copyright 1995-2021 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 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) 366 { 367 X509 *x; 368 int i = 0; 369 X509_STORE *verify_store; 370 X509_STORE_CTX *ctx = NULL; 371 X509_VERIFY_PARAM *param; 372 373 if ((sk == NULL) || (sk_X509_num(sk) == 0)) 374 return 0; 375 376 if (s->cert->verify_store) 377 verify_store = s->cert->verify_store; 378 else 379 verify_store = s->ctx->cert_store; 380 381 ctx = X509_STORE_CTX_new_ex(s->ctx->libctx, s->ctx->propq); 382 if (ctx == NULL) { 383 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 384 return 0; 385 } 386 387 x = sk_X509_value(sk, 0); 388 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) { 389 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); 390 goto end; 391 } 392 param = X509_STORE_CTX_get0_param(ctx); 393 /* 394 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some 395 * point, for now a single @SECLEVEL sets the same policy for TLS crypto 396 * and PKI authentication. 397 */ 398 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s)); 399 400 /* Set suite B flags if needed */ 401 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s)); 402 if (!X509_STORE_CTX_set_ex_data 403 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) { 404 goto end; 405 } 406 407 /* Verify via DANE if enabled */ 408 if (DANETLS_ENABLED(&s->dane)) 409 X509_STORE_CTX_set0_dane(ctx, &s->dane); 410 411 /* 412 * We need to inherit the verify parameters. These can be determined by 413 * the context: if its a server it will verify SSL client certificates or 414 * vice versa. 415 */ 416 417 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server"); 418 /* 419 * Anything non-default in "s->param" should overwrite anything in the ctx. 420 */ 421 X509_VERIFY_PARAM_set1(param, s->param); 422 423 if (s->verify_callback) 424 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback); 425 426 if (s->ctx->app_verify_callback != NULL) 427 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg); 428 else 429 i = X509_verify_cert(ctx); 430 431 s->verify_result = X509_STORE_CTX_get_error(ctx); 432 sk_X509_pop_free(s->verified_chain, X509_free); 433 s->verified_chain = NULL; 434 if (X509_STORE_CTX_get0_chain(ctx) != NULL) { 435 s->verified_chain = X509_STORE_CTX_get1_chain(ctx); 436 if (s->verified_chain == NULL) { 437 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 438 i = 0; 439 } 440 } 441 442 /* Move peername from the store context params to the SSL handle's */ 443 X509_VERIFY_PARAM_move_peername(s->param, param); 444 445 end: 446 X509_STORE_CTX_free(ctx); 447 return i; 448 } 449 450 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list, 451 STACK_OF(X509_NAME) *name_list) 452 { 453 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); 454 *ca_list = name_list; 455 } 456 457 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) 458 { 459 int i; 460 const int num = sk_X509_NAME_num(sk); 461 STACK_OF(X509_NAME) *ret; 462 X509_NAME *name; 463 464 ret = sk_X509_NAME_new_reserve(NULL, num); 465 if (ret == NULL) { 466 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 467 return NULL; 468 } 469 for (i = 0; i < num; i++) { 470 name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); 471 if (name == NULL) { 472 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 473 sk_X509_NAME_pop_free(ret, X509_NAME_free); 474 return NULL; 475 } 476 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */ 477 } 478 return ret; 479 } 480 481 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 482 { 483 set0_CA_list(&s->ca_names, name_list); 484 } 485 486 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 487 { 488 set0_CA_list(&ctx->ca_names, name_list); 489 } 490 491 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx) 492 { 493 return ctx->ca_names; 494 } 495 496 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s) 497 { 498 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names; 499 } 500 501 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 502 { 503 set0_CA_list(&ctx->client_ca_names, name_list); 504 } 505 506 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) 507 { 508 return ctx->client_ca_names; 509 } 510 511 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 512 { 513 set0_CA_list(&s->client_ca_names, name_list); 514 } 515 516 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s) 517 { 518 return s->s3.tmp.peer_ca_names; 519 } 520 521 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s) 522 { 523 if (!s->server) 524 return s->s3.tmp.peer_ca_names; 525 return s->client_ca_names != NULL ? s->client_ca_names 526 : s->ctx->client_ca_names; 527 } 528 529 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x) 530 { 531 X509_NAME *name; 532 533 if (x == NULL) 534 return 0; 535 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL)) 536 return 0; 537 538 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) 539 return 0; 540 541 if (!sk_X509_NAME_push(*sk, name)) { 542 X509_NAME_free(name); 543 return 0; 544 } 545 return 1; 546 } 547 548 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x) 549 { 550 return add_ca_name(&ssl->ca_names, x); 551 } 552 553 int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x) 554 { 555 return add_ca_name(&ctx->ca_names, x); 556 } 557 558 /* 559 * The following two are older names are to be replaced with 560 * SSL(_CTX)_add1_to_CA_list 561 */ 562 int SSL_add_client_CA(SSL *ssl, X509 *x) 563 { 564 return add_ca_name(&ssl->client_ca_names, x); 565 } 566 567 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) 568 { 569 return add_ca_name(&ctx->client_ca_names, x); 570 } 571 572 static int xname_cmp(const X509_NAME *a, const X509_NAME *b) 573 { 574 unsigned char *abuf = NULL, *bbuf = NULL; 575 int alen, blen, ret; 576 577 /* X509_NAME_cmp() itself casts away constness in this way, so 578 * assume it's safe: 579 */ 580 alen = i2d_X509_NAME((X509_NAME *)a, &abuf); 581 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf); 582 583 if (alen < 0 || blen < 0) 584 ret = -2; 585 else if (alen != blen) 586 ret = alen - blen; 587 else /* alen == blen */ 588 ret = memcmp(abuf, bbuf, alen); 589 590 OPENSSL_free(abuf); 591 OPENSSL_free(bbuf); 592 593 return ret; 594 } 595 596 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 597 { 598 return xname_cmp(*a, *b); 599 } 600 601 static unsigned long xname_hash(const X509_NAME *a) 602 { 603 /* This returns 0 also if SHA1 is not available */ 604 return X509_NAME_hash_ex((X509_NAME *)a, NULL, NULL, NULL); 605 } 606 607 STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file, 608 OSSL_LIB_CTX *libctx, 609 const char *propq) 610 { 611 BIO *in = BIO_new(BIO_s_file()); 612 X509 *x = NULL; 613 X509_NAME *xn = NULL; 614 STACK_OF(X509_NAME) *ret = NULL; 615 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); 616 OSSL_LIB_CTX *prev_libctx = NULL; 617 618 if ((name_hash == NULL) || (in == NULL)) { 619 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 620 goto err; 621 } 622 623 x = X509_new_ex(libctx, propq); 624 if (x == NULL) { 625 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 626 goto err; 627 } 628 if (!BIO_read_filename(in, file)) 629 goto err; 630 631 /* Internally lh_X509_NAME_retrieve() needs the libctx to retrieve SHA1 */ 632 prev_libctx = OSSL_LIB_CTX_set0_default(libctx); 633 for (;;) { 634 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 635 break; 636 if (ret == NULL) { 637 ret = sk_X509_NAME_new_null(); 638 if (ret == NULL) { 639 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 640 goto err; 641 } 642 } 643 if ((xn = X509_get_subject_name(x)) == NULL) 644 goto err; 645 /* check for duplicates */ 646 xn = X509_NAME_dup(xn); 647 if (xn == NULL) 648 goto err; 649 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { 650 /* Duplicate. */ 651 X509_NAME_free(xn); 652 xn = NULL; 653 } else { 654 lh_X509_NAME_insert(name_hash, xn); 655 if (!sk_X509_NAME_push(ret, xn)) 656 goto err; 657 } 658 } 659 goto done; 660 661 err: 662 X509_NAME_free(xn); 663 sk_X509_NAME_pop_free(ret, X509_NAME_free); 664 ret = NULL; 665 done: 666 /* restore the old libctx */ 667 OSSL_LIB_CTX_set0_default(prev_libctx); 668 BIO_free(in); 669 X509_free(x); 670 lh_X509_NAME_free(name_hash); 671 if (ret != NULL) 672 ERR_clear_error(); 673 return ret; 674 } 675 676 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) 677 { 678 return SSL_load_client_CA_file_ex(file, NULL, NULL); 679 } 680 681 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 682 const char *file) 683 { 684 BIO *in; 685 X509 *x = NULL; 686 X509_NAME *xn = NULL; 687 int ret = 1; 688 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b); 689 690 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); 691 692 in = BIO_new(BIO_s_file()); 693 694 if (in == NULL) { 695 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 696 goto err; 697 } 698 699 if (!BIO_read_filename(in, file)) 700 goto err; 701 702 for (;;) { 703 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 704 break; 705 if ((xn = X509_get_subject_name(x)) == NULL) 706 goto err; 707 xn = X509_NAME_dup(xn); 708 if (xn == NULL) 709 goto err; 710 if (sk_X509_NAME_find(stack, xn) >= 0) { 711 /* Duplicate. */ 712 X509_NAME_free(xn); 713 } else if (!sk_X509_NAME_push(stack, xn)) { 714 X509_NAME_free(xn); 715 goto err; 716 } 717 } 718 719 ERR_clear_error(); 720 goto done; 721 722 err: 723 ret = 0; 724 done: 725 BIO_free(in); 726 X509_free(x); 727 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 728 return ret; 729 } 730 731 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 732 const char *dir) 733 { 734 OPENSSL_DIR_CTX *d = NULL; 735 const char *filename; 736 int ret = 0; 737 738 /* Note that a side effect is that the CAs will be sorted by name */ 739 740 while ((filename = OPENSSL_DIR_read(&d, dir))) { 741 char buf[1024]; 742 int r; 743 744 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) { 745 ERR_raise(ERR_LIB_SSL, SSL_R_PATH_TOO_LONG); 746 goto err; 747 } 748 #ifdef OPENSSL_SYS_VMS 749 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename); 750 #else 751 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename); 752 #endif 753 if (r <= 0 || r >= (int)sizeof(buf)) 754 goto err; 755 if (!SSL_add_file_cert_subjects_to_stack(stack, buf)) 756 goto err; 757 } 758 759 if (errno) { 760 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(), 761 "calling OPENSSL_dir_read(%s)", dir); 762 ERR_raise(ERR_LIB_SSL, ERR_R_SYS_LIB); 763 goto err; 764 } 765 766 ret = 1; 767 768 err: 769 if (d) 770 OPENSSL_DIR_end(&d); 771 772 return ret; 773 } 774 775 static int add_uris_recursive(STACK_OF(X509_NAME) *stack, 776 const char *uri, int depth) 777 { 778 int ok = 1; 779 OSSL_STORE_CTX *ctx = NULL; 780 X509 *x = NULL; 781 X509_NAME *xn = NULL; 782 783 if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL) 784 goto err; 785 786 while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) { 787 OSSL_STORE_INFO *info = OSSL_STORE_load(ctx); 788 int infotype = info == 0 ? 0 : OSSL_STORE_INFO_get_type(info); 789 790 if (info == NULL) 791 continue; 792 793 if (infotype == OSSL_STORE_INFO_NAME) { 794 /* 795 * This is an entry in the "directory" represented by the current 796 * uri. if |depth| allows, dive into it. 797 */ 798 if (depth > 0) 799 ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info), 800 depth - 1); 801 } else if (infotype == OSSL_STORE_INFO_CERT) { 802 if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL 803 || (xn = X509_get_subject_name(x)) == NULL 804 || (xn = X509_NAME_dup(xn)) == NULL) 805 goto err; 806 if (sk_X509_NAME_find(stack, xn) >= 0) { 807 /* Duplicate. */ 808 X509_NAME_free(xn); 809 } else if (!sk_X509_NAME_push(stack, xn)) { 810 X509_NAME_free(xn); 811 goto err; 812 } 813 } 814 815 OSSL_STORE_INFO_free(info); 816 } 817 818 ERR_clear_error(); 819 goto done; 820 821 err: 822 ok = 0; 823 done: 824 OSSL_STORE_close(ctx); 825 826 return ok; 827 } 828 829 int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 830 const char *store) 831 { 832 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b) 833 = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); 834 int ret = add_uris_recursive(stack, store, 1); 835 836 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 837 return ret; 838 } 839 840 /* Build a certificate chain for current certificate */ 841 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags) 842 { 843 CERT *c = s ? s->cert : ctx->cert; 844 CERT_PKEY *cpk = c->key; 845 X509_STORE *chain_store = NULL; 846 X509_STORE_CTX *xs_ctx = NULL; 847 STACK_OF(X509) *chain = NULL, *untrusted = NULL; 848 X509 *x; 849 SSL_CTX *real_ctx = (s == NULL) ? ctx : s->ctx; 850 int i, rv = 0; 851 852 if (!cpk->x509) { 853 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_SET); 854 goto err; 855 } 856 /* Rearranging and check the chain: add everything to a store */ 857 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { 858 chain_store = X509_STORE_new(); 859 if (chain_store == NULL) 860 goto err; 861 for (i = 0; i < sk_X509_num(cpk->chain); i++) { 862 x = sk_X509_value(cpk->chain, i); 863 if (!X509_STORE_add_cert(chain_store, x)) 864 goto err; 865 } 866 /* Add EE cert too: it might be self signed */ 867 if (!X509_STORE_add_cert(chain_store, cpk->x509)) 868 goto err; 869 } else { 870 if (c->chain_store) 871 chain_store = c->chain_store; 872 else if (s) 873 chain_store = s->ctx->cert_store; 874 else 875 chain_store = ctx->cert_store; 876 877 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) 878 untrusted = cpk->chain; 879 } 880 881 xs_ctx = X509_STORE_CTX_new_ex(real_ctx->libctx, real_ctx->propq); 882 if (xs_ctx == NULL) { 883 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 884 goto err; 885 } 886 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) { 887 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); 888 goto err; 889 } 890 /* Set suite B flags if needed */ 891 X509_STORE_CTX_set_flags(xs_ctx, 892 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS); 893 894 i = X509_verify_cert(xs_ctx); 895 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { 896 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) 897 ERR_clear_error(); 898 i = 1; 899 rv = 2; 900 } 901 if (i > 0) 902 chain = X509_STORE_CTX_get1_chain(xs_ctx); 903 if (i <= 0) { 904 i = X509_STORE_CTX_get_error(xs_ctx); 905 ERR_raise_data(ERR_LIB_SSL, SSL_R_CERTIFICATE_VERIFY_FAILED, 906 "Verify error:%s", X509_verify_cert_error_string(i)); 907 908 goto err; 909 } 910 /* Remove EE certificate from chain */ 911 x = sk_X509_shift(chain); 912 X509_free(x); 913 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { 914 if (sk_X509_num(chain) > 0) { 915 /* See if last cert is self signed */ 916 x = sk_X509_value(chain, sk_X509_num(chain) - 1); 917 if (X509_get_extension_flags(x) & EXFLAG_SS) { 918 x = sk_X509_pop(chain); 919 X509_free(x); 920 } 921 } 922 } 923 /* 924 * Check security level of all CA certificates: EE will have been checked 925 * already. 926 */ 927 for (i = 0; i < sk_X509_num(chain); i++) { 928 x = sk_X509_value(chain, i); 929 rv = ssl_security_cert(s, ctx, x, 0, 0); 930 if (rv != 1) { 931 ERR_raise(ERR_LIB_SSL, rv); 932 sk_X509_pop_free(chain, X509_free); 933 rv = 0; 934 goto err; 935 } 936 } 937 sk_X509_pop_free(cpk->chain, X509_free); 938 cpk->chain = chain; 939 if (rv == 0) 940 rv = 1; 941 err: 942 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) 943 X509_STORE_free(chain_store); 944 X509_STORE_CTX_free(xs_ctx); 945 946 return rv; 947 } 948 949 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) 950 { 951 X509_STORE **pstore; 952 if (chain) 953 pstore = &c->chain_store; 954 else 955 pstore = &c->verify_store; 956 X509_STORE_free(*pstore); 957 *pstore = store; 958 if (ref && store) 959 X509_STORE_up_ref(store); 960 return 1; 961 } 962 963 int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp) 964 { 965 int level; 966 /* 967 * note that there's a corresponding minbits_table 968 * in crypto/x509/x509_vfy.c that's used for checking the security level 969 * of RSA and DSA keys 970 */ 971 static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 }; 972 973 if (ctx != NULL) 974 level = SSL_CTX_get_security_level(ctx); 975 else 976 level = SSL_get_security_level(s); 977 978 if (level > 5) 979 level = 5; 980 else if (level < 0) 981 level = 0; 982 983 if (levelp != NULL) 984 *levelp = level; 985 986 return minbits_table[level]; 987 } 988 989 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, 990 int op, int bits, int nid, void *other, 991 void *ex) 992 { 993 int level, minbits; 994 995 minbits = ssl_get_security_level_bits(s, ctx, &level); 996 997 if (level == 0) { 998 /* 999 * No EDH keys weaker than 1024-bits even at level 0, otherwise, 1000 * anything goes. 1001 */ 1002 if (op == SSL_SECOP_TMP_DH && bits < 80) 1003 return 0; 1004 return 1; 1005 } 1006 switch (op) { 1007 case SSL_SECOP_CIPHER_SUPPORTED: 1008 case SSL_SECOP_CIPHER_SHARED: 1009 case SSL_SECOP_CIPHER_CHECK: 1010 { 1011 const SSL_CIPHER *c = other; 1012 /* No ciphers below security level */ 1013 if (bits < minbits) 1014 return 0; 1015 /* No unauthenticated ciphersuites */ 1016 if (c->algorithm_auth & SSL_aNULL) 1017 return 0; 1018 /* No MD5 mac ciphersuites */ 1019 if (c->algorithm_mac & SSL_MD5) 1020 return 0; 1021 /* SHA1 HMAC is 160 bits of security */ 1022 if (minbits > 160 && c->algorithm_mac & SSL_SHA1) 1023 return 0; 1024 /* Level 2: no RC4 */ 1025 if (level >= 2 && c->algorithm_enc == SSL_RC4) 1026 return 0; 1027 /* Level 3: forward secure ciphersuites only */ 1028 if (level >= 3 && c->min_tls != TLS1_3_VERSION && 1029 !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH))) 1030 return 0; 1031 break; 1032 } 1033 case SSL_SECOP_VERSION: 1034 if (!SSL_IS_DTLS(s)) { 1035 /* SSLv3 not allowed at level 2 */ 1036 if (nid <= SSL3_VERSION && level >= 2) 1037 return 0; 1038 /* TLS v1.1 and above only for level 3 */ 1039 if (nid <= TLS1_VERSION && level >= 3) 1040 return 0; 1041 /* TLS v1.2 only for level 4 and above */ 1042 if (nid <= TLS1_1_VERSION && level >= 4) 1043 return 0; 1044 } else { 1045 /* DTLS v1.2 only for level 4 and above */ 1046 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4) 1047 return 0; 1048 } 1049 break; 1050 1051 case SSL_SECOP_COMPRESSION: 1052 if (level >= 2) 1053 return 0; 1054 break; 1055 case SSL_SECOP_TICKET: 1056 if (level >= 3) 1057 return 0; 1058 break; 1059 default: 1060 if (bits < minbits) 1061 return 0; 1062 } 1063 return 1; 1064 } 1065 1066 int ssl_security(const SSL *s, int op, int bits, int nid, void *other) 1067 { 1068 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex); 1069 } 1070 1071 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other) 1072 { 1073 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, 1074 ctx->cert->sec_ex); 1075 } 1076 1077 int ssl_cert_lookup_by_nid(int nid, size_t *pidx) 1078 { 1079 size_t i; 1080 1081 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { 1082 if (ssl_cert_info[i].nid == nid) { 1083 *pidx = i; 1084 return 1; 1085 } 1086 } 1087 1088 return 0; 1089 } 1090 1091 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx) 1092 { 1093 size_t i; 1094 1095 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { 1096 const SSL_CERT_LOOKUP *tmp_lu = &ssl_cert_info[i]; 1097 1098 if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid)) 1099 || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) { 1100 if (pidx != NULL) 1101 *pidx = i; 1102 return tmp_lu; 1103 } 1104 } 1105 1106 return NULL; 1107 } 1108 1109 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx) 1110 { 1111 if (idx >= OSSL_NELEM(ssl_cert_info)) 1112 return NULL; 1113 return &ssl_cert_info[idx]; 1114 } 1115