1/*
2 * Copyright 1995-2018 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
28static 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
32static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
33static volatile int ssl_x509_store_ctx_idx = -1;
34
35DEFINE_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
43int 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
51CERT *ssl_cert_new(void)
52{
53 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
54
55 if (ret == NULL) {
56 SSLerr(SSL_F_SSL_CERT_NEW, 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 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
68 OPENSSL_free(ret);
69 return NULL;
70 }
71
72 return ret;
73}
74
75CERT *ssl_cert_dup(CERT *cert)
76{
77 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
78 int i;
79
80 if (ret == NULL) {
81 SSLerr(SSL_F_SSL_CERT_DUP, 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 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
90 OPENSSL_free(ret);
91 return NULL;
92 }
93#ifndef OPENSSL_NO_DH
94 if (cert->dh_tmp != NULL) {
95 ret->dh_tmp = cert->dh_tmp;
96 EVP_PKEY_up_ref(ret->dh_tmp);
97 }
98 ret->dh_tmp_cb = cert->dh_tmp_cb;
99 ret->dh_tmp_auto = cert->dh_tmp_auto;
100#endif
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 SSLerr(SSL_F_SSL_CERT_DUP, 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 SSLerr(SSL_F_SSL_CERT_DUP, 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
204void 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
223void 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#ifndef OPENSSL_NO_DH
236 EVP_PKEY_free(c->dh_tmp);
237#endif
238
239 ssl_cert_clear_certs(c);
240 OPENSSL_free(c->conf_sigalgs);
241 OPENSSL_free(c->client_sigalgs);
242 OPENSSL_free(c->ctype);
243 X509_STORE_free(c->verify_store);
244 X509_STORE_free(c->chain_store);
245 custom_exts_free(&c->custext);
246#ifndef OPENSSL_NO_PSK
247 OPENSSL_free(c->psk_identity_hint);
248#endif
249 CRYPTO_THREAD_lock_free(c->lock);
250 OPENSSL_free(c);
251}
252
253int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
254{
255 int i, r;
256 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
257 if (!cpk)
258 return 0;
259 for (i = 0; i < sk_X509_num(chain); i++) {
260 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
261 if (r != 1) {
262 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
263 return 0;
264 }
265 }
266 sk_X509_pop_free(cpk->chain, X509_free);
267 cpk->chain = chain;
268 return 1;
269}
270
271int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
272{
273 STACK_OF(X509) *dchain;
274 if (!chain)
275 return ssl_cert_set0_chain(s, ctx, NULL);
276 dchain = X509_chain_up_ref(chain);
277 if (!dchain)
278 return 0;
279 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
280 sk_X509_pop_free(dchain, X509_free);
281 return 0;
282 }
283 return 1;
284}
285
286int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
287{
288 int r;
289 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
290 if (!cpk)
291 return 0;
292 r = ssl_security_cert(s, ctx, x, 0, 0);
293 if (r != 1) {
294 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
295 return 0;
296 }
297 if (!cpk->chain)
298 cpk->chain = sk_X509_new_null();
299 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
300 return 0;
301 return 1;
302}
303
304int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
305{
306 if (!ssl_cert_add0_chain_cert(s, ctx, x))
307 return 0;
308 X509_up_ref(x);
309 return 1;
310}
311
312int ssl_cert_select_current(CERT *c, X509 *x)
313{
314 int i;
315 if (x == NULL)
316 return 0;
317 for (i = 0; i < SSL_PKEY_NUM; i++) {
318 CERT_PKEY *cpk = c->pkeys + i;
319 if (cpk->x509 == x && cpk->privatekey) {
320 c->key = cpk;
321 return 1;
322 }
323 }
324
325 for (i = 0; i < SSL_PKEY_NUM; i++) {
326 CERT_PKEY *cpk = c->pkeys + i;
327 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
328 c->key = cpk;
329 return 1;
330 }
331 }
332 return 0;
333}
334
335int ssl_cert_set_current(CERT *c, long op)
336{
337 int i, idx;
338 if (!c)
339 return 0;
340 if (op == SSL_CERT_SET_FIRST)
341 idx = 0;
342 else if (op == SSL_CERT_SET_NEXT) {
343 idx = (int)(c->key - c->pkeys + 1);
344 if (idx >= SSL_PKEY_NUM)
345 return 0;
346 } else
347 return 0;
348 for (i = idx; i < SSL_PKEY_NUM; i++) {
349 CERT_PKEY *cpk = c->pkeys + i;
350 if (cpk->x509 && cpk->privatekey) {
351 c->key = cpk;
352 return 1;
353 }
354 }
355 return 0;
356}
357
358void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
359{
360 c->cert_cb = cb;
361 c->cert_cb_arg = arg;
362}
363
364int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
365{
366 X509 *x;
367 int i = 0;
368 X509_STORE *verify_store;
369 X509_STORE_CTX *ctx = NULL;
370 X509_VERIFY_PARAM *param;
371
372 if ((sk == NULL) || (sk_X509_num(sk) == 0))
373 return 0;
374
375 if (s->cert->verify_store)
376 verify_store = s->cert->verify_store;
377 else
378 verify_store = s->ctx->cert_store;
379
380 ctx = X509_STORE_CTX_new();
381 if (ctx == NULL) {
382 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
383 return 0;
384 }
385
386 x = sk_X509_value(sk, 0);
387 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
388 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
389 goto end;
390 }
391 param = X509_STORE_CTX_get0_param(ctx);
392 /*
393 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
394 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
395 * and PKI authentication.
396 */
397 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));
398
399 /* Set suite B flags if needed */
400 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
401 if (!X509_STORE_CTX_set_ex_data
402 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
403 goto end;
404 }
405
406 /* Verify via DANE if enabled */
407 if (DANETLS_ENABLED(&s->dane))
408 X509_STORE_CTX_set0_dane(ctx, &s->dane);
409
410 /*
411 * We need to inherit the verify parameters. These can be determined by
412 * the context: if its a server it will verify SSL client certificates or
413 * vice versa.
414 */
415
416 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
417 /*
418 * Anything non-default in "s->param" should overwrite anything in the ctx.
419 */
420 X509_VERIFY_PARAM_set1(param, s->param);
421
422 if (s->verify_callback)
423 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
424
425 if (s->ctx->app_verify_callback != NULL)
426 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
427 else
428 i = X509_verify_cert(ctx);
429
430 s->verify_result = X509_STORE_CTX_get_error(ctx);
431 sk_X509_pop_free(s->verified_chain, X509_free);
432 s->verified_chain = NULL;
433 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
434 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
435 if (s->verified_chain == NULL) {
436 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
437 i = 0;
438 }
439 }
440
441 /* Move peername from the store context params to the SSL handle's */
442 X509_VERIFY_PARAM_move_peername(s->param, param);
443
444 end:
445 X509_STORE_CTX_free(ctx);
446 return i;
447}
448
449static void set0_CA_list(STACK_OF(X509_NAME) **ca_list,
450 STACK_OF(X509_NAME) *name_list)
451{
452 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
453 *ca_list = name_list;
454}
455
456STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
457{
458 int i;
459 const int num = sk_X509_NAME_num(sk);
460 STACK_OF(X509_NAME) *ret;
461 X509_NAME *name;
462
463 ret = sk_X509_NAME_new_reserve(NULL, num);
464 if (ret == NULL) {
465 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
466 return NULL;
467 }
468 for (i = 0; i < num; i++) {
469 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
470 if (name == NULL) {
471 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
472 sk_X509_NAME_pop_free(ret, X509_NAME_free);
473 return NULL;
474 }
475 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */
476 }
477 return ret;
478}
479
480void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
481{
482 set0_CA_list(&s->ca_names, name_list);
483}
484
485void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
486{
487 set0_CA_list(&ctx->ca_names, name_list);
488}
489
490const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx)
491{
492 return ctx->ca_names;
493}
494
495const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s)
496{
497 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names;
498}
499
500void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
501{
502 set0_CA_list(&ctx->client_ca_names, name_list);
503}
504
505STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
506{
507 return ctx->client_ca_names;
508}
509
510void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
511{
512 set0_CA_list(&s->client_ca_names, name_list);
513}
514
515const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s)
516{
517 return s->s3.tmp.peer_ca_names;
518}
519
520STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
521{
522 if (!s->server)
523 return s->s3.tmp.peer_ca_names;
524 return s->client_ca_names != NULL ? s->client_ca_names
525 : s->ctx->client_ca_names;
526}
527
528static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x)
529{
530 X509_NAME *name;
531
532 if (x == NULL)
533 return 0;
534 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL))
535 return 0;
536
537 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
538 return 0;
539
540 if (!sk_X509_NAME_push(*sk, name)) {
541 X509_NAME_free(name);
542 return 0;
543 }
544 return 1;
545}
546
547int SSL_add1_to_CA_list(SSL *ssl, const X509 *x)
548{
549 return add_ca_name(&ssl->ca_names, x);
550}
551
552int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x)
553{
554 return add_ca_name(&ctx->ca_names, x);
555}
556
557/*
558 * The following two are older names are to be replaced with
559 * SSL(_CTX)_add1_to_CA_list
560 */
561int SSL_add_client_CA(SSL *ssl, X509 *x)
562{
563 return add_ca_name(&ssl->client_ca_names, x);
564}
565
566int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
567{
568 return add_ca_name(&ctx->client_ca_names, x);
569}
570
571static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
572{
573 unsigned char *abuf = NULL, *bbuf = NULL;
574 int alen, blen, ret;
575
576 /* X509_NAME_cmp() itself casts away constness in this way, so
577 * assume it's safe:
578 */
579 alen = i2d_X509_NAME((X509_NAME *)a, &abuf);
580 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf);
581
582 if (alen < 0 || blen < 0)
583 ret = -2;
584 else if (alen != blen)
585 ret = alen - blen;
586 else /* alen == blen */
587 ret = memcmp(abuf, bbuf, alen);
588
589 OPENSSL_free(abuf);
590 OPENSSL_free(bbuf);
591
592 return ret;
593}
594
595static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
596{
597 return xname_cmp(*a, *b);
598}
599
600static unsigned long xname_hash(const X509_NAME *a)
601{
602 return X509_NAME_hash((X509_NAME *)a);
603}
604
605STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
606{
607 BIO *in = BIO_new(BIO_s_file());
608 X509 *x = NULL;
609 X509_NAME *xn = NULL;
610 STACK_OF(X509_NAME) *ret = NULL;
611 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
612
613 if ((name_hash == NULL) || (in == NULL)) {
614 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
615 goto err;
616 }
617
618 if (!BIO_read_filename(in, file))
619 goto err;
620
621 for (;;) {
622 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
623 break;
624 if (ret == NULL) {
625 ret = sk_X509_NAME_new_null();
626 if (ret == NULL) {
627 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
628 goto err;
629 }
630 }
631 if ((xn = X509_get_subject_name(x)) == NULL)
632 goto err;
633 /* check for duplicates */
634 xn = X509_NAME_dup(xn);
635 if (xn == NULL)
636 goto err;
637 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
638 /* Duplicate. */
639 X509_NAME_free(xn);
640 xn = NULL;
641 } else {
642 lh_X509_NAME_insert(name_hash, xn);
643 if (!sk_X509_NAME_push(ret, xn))
644 goto err;
645 }
646 }
647 goto done;
648
649 err:
650 X509_NAME_free(xn);
651 sk_X509_NAME_pop_free(ret, X509_NAME_free);
652 ret = NULL;
653 done:
654 BIO_free(in);
655 X509_free(x);
656 lh_X509_NAME_free(name_hash);
657 if (ret != NULL)
658 ERR_clear_error();
659 return ret;
660}
661
662int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
663 const char *file)
664{
665 BIO *in;
666 X509 *x = NULL;
667 X509_NAME *xn = NULL;
668 int ret = 1;
669 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
670
671 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
672
673 in = BIO_new(BIO_s_file());
674
675 if (in == NULL) {
676 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE);
677 goto err;
678 }
679
680 if (!BIO_read_filename(in, file))
681 goto err;
682
683 for (;;) {
684 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
685 break;
686 if ((xn = X509_get_subject_name(x)) == NULL)
687 goto err;
688 xn = X509_NAME_dup(xn);
689 if (xn == NULL)
690 goto err;
691 if (sk_X509_NAME_find(stack, xn) >= 0) {
692 /* Duplicate. */
693 X509_NAME_free(xn);
694 } else if (!sk_X509_NAME_push(stack, xn)) {
695 X509_NAME_free(xn);
696 goto err;
697 }
698 }
699
700 ERR_clear_error();
701 goto done;
702
703 err:
704 ret = 0;
705 done:
706 BIO_free(in);
707 X509_free(x);
708 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
709 return ret;
710}
711
712int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
713 const char *dir)
714{
715 OPENSSL_DIR_CTX *d = NULL;
716 const char *filename;
717 int ret = 0;
718
719 /* Note that a side effect is that the CAs will be sorted by name */
720
721 while ((filename = OPENSSL_DIR_read(&d, dir))) {
722 char buf[1024];
723 int r;
724
725 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) {
726 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
727 SSL_R_PATH_TOO_LONG);
728 goto err;
729 }
730#ifdef OPENSSL_SYS_VMS
731 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename);
732#else
733 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename);
734#endif
735 if (r <= 0 || r >= (int)sizeof(buf))
736 goto err;
737 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
738 goto err;
739 }
740
741 if (errno) {
742 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
743 "calling OPENSSL_dir_read(%s)",
744 dir);
745 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
746 goto err;
747 }
748
749 ret = 1;
750
751 err:
752 if (d)
753 OPENSSL_DIR_end(&d);
754
755 return ret;
756}
757
758static int add_uris_recursive(STACK_OF(X509_NAME) *stack,
759 const char *uri, int depth)
760{
761 int ok = 1;
762 OSSL_STORE_CTX *ctx = NULL;
763 X509 *x = NULL;
764 X509_NAME *xn = NULL;
765
766 if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL)
767 goto err;
768
769 while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) {
770 OSSL_STORE_INFO *info = OSSL_STORE_load(ctx);
771 int infotype = info == 0 ? 0 : OSSL_STORE_INFO_get_type(info);
772
773 if (info == NULL)
774 continue;
775
776 if (infotype == OSSL_STORE_INFO_NAME) {
777 /*
778 * This is an entry in the "directory" represented by the current
779 * uri. if |depth| allows, dive into it.
780 */
781 if (depth > 0)
782 ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info),
783 depth - 1);
784 } else if (infotype == OSSL_STORE_INFO_CERT) {
785 if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL
786 || (xn = X509_get_subject_name(x)) == NULL
787 || (xn = X509_NAME_dup(xn)) == NULL)
788 goto err;
789 if (sk_X509_NAME_find(stack, xn) >= 0) {
790 /* Duplicate. */
791 X509_NAME_free(xn);
792 } else if (!sk_X509_NAME_push(stack, xn)) {
793 X509_NAME_free(xn);
794 goto err;
795 }
796 }
797
798 OSSL_STORE_INFO_free(info);
799 }
800
801 ERR_clear_error();
802 goto done;
803
804 err:
805 ok = 0;
806 done:
807 OSSL_STORE_close(ctx);
808
809 return ok;
810}
811
812int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
813 const char *store)
814{
815 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b)
816 = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
817 int ret = add_uris_recursive(stack, store, 1);
818
819 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
820 return ret;
821}
822
823/* Build a certificate chain for current certificate */
824int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
825{
826 CERT *c = s ? s->cert : ctx->cert;
827 CERT_PKEY *cpk = c->key;
828 X509_STORE *chain_store = NULL;
829 X509_STORE_CTX *xs_ctx = NULL;
830 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
831 X509 *x;
832 int i, rv = 0;
833
834 if (!cpk->x509) {
835 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
836 goto err;
837 }
838 /* Rearranging and check the chain: add everything to a store */
839 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
840 chain_store = X509_STORE_new();
841 if (chain_store == NULL)
842 goto err;
843 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
844 x = sk_X509_value(cpk->chain, i);
845 if (!X509_STORE_add_cert(chain_store, x))
846 goto err;
847 }
848 /* Add EE cert too: it might be self signed */
849 if (!X509_STORE_add_cert(chain_store, cpk->x509))
850 goto err;
851 } else {
852 if (c->chain_store)
853 chain_store = c->chain_store;
854 else if (s)
855 chain_store = s->ctx->cert_store;
856 else
857 chain_store = ctx->cert_store;
858
859 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
860 untrusted = cpk->chain;
861 }
862
863 xs_ctx = X509_STORE_CTX_new();
864 if (xs_ctx == NULL) {
865 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
866 goto err;
867 }
868 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
869 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
870 goto err;
871 }
872 /* Set suite B flags if needed */
873 X509_STORE_CTX_set_flags(xs_ctx,
874 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
875
876 i = X509_verify_cert(xs_ctx);
877 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
878 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
879 ERR_clear_error();
880 i = 1;
881 rv = 2;
882 }
883 if (i > 0)
884 chain = X509_STORE_CTX_get1_chain(xs_ctx);
885 if (i <= 0) {
886 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
887 i = X509_STORE_CTX_get_error(xs_ctx);
888 ERR_add_error_data(2, "Verify error:",
889 X509_verify_cert_error_string(i));
890
891 goto err;
892 }
893 /* Remove EE certificate from chain */
894 x = sk_X509_shift(chain);
895 X509_free(x);
896 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
897 if (sk_X509_num(chain) > 0) {
898 /* See if last cert is self signed */
899 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
900 if (X509_get_extension_flags(x) & EXFLAG_SS) {
901 x = sk_X509_pop(chain);
902 X509_free(x);
903 }
904 }
905 }
906 /*
907 * Check security level of all CA certificates: EE will have been checked
908 * already.
909 */
910 for (i = 0; i < sk_X509_num(chain); i++) {
911 x = sk_X509_value(chain, i);
912 rv = ssl_security_cert(s, ctx, x, 0, 0);
913 if (rv != 1) {
914 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
915 sk_X509_pop_free(chain, X509_free);
916 rv = 0;
917 goto err;
918 }
919 }
920 sk_X509_pop_free(cpk->chain, X509_free);
921 cpk->chain = chain;
922 if (rv == 0)
923 rv = 1;
924 err:
925 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
926 X509_STORE_free(chain_store);
927 X509_STORE_CTX_free(xs_ctx);
928
929 return rv;
930}
931
932int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
933{
934 X509_STORE **pstore;
935 if (chain)
936 pstore = &c->chain_store;
937 else
938 pstore = &c->verify_store;
939 X509_STORE_free(*pstore);
940 *pstore = store;
941 if (ref && store)
942 X509_STORE_up_ref(store);
943 return 1;
944}
945
946static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
947 int op, int bits, int nid, void *other,
948 void *ex)
949{
950 int level, minbits;
951 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
952 if (ctx)
953 level = SSL_CTX_get_security_level(ctx);
954 else
955 level = SSL_get_security_level(s);
956
957 if (level <= 0) {
958 /*
959 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
960 * anything goes.
961 */
962 if (op == SSL_SECOP_TMP_DH && bits < 80)
963 return 0;
964 return 1;
965 }
966 if (level > 5)
967 level = 5;
968 minbits = minbits_table[level - 1];
969 switch (op) {
970 case SSL_SECOP_CIPHER_SUPPORTED:
971 case SSL_SECOP_CIPHER_SHARED:
972 case SSL_SECOP_CIPHER_CHECK:
973 {
974 const SSL_CIPHER *c = other;
975 /* No ciphers below security level */
976 if (bits < minbits)
977 return 0;
978 /* No unauthenticated ciphersuites */
979 if (c->algorithm_auth & SSL_aNULL)
980 return 0;
981 /* No MD5 mac ciphersuites */
982 if (c->algorithm_mac & SSL_MD5)
983 return 0;
984 /* SHA1 HMAC is 160 bits of security */
985 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
986 return 0;
987 /* Level 2: no RC4 */
988 if (level >= 2 && c->algorithm_enc == SSL_RC4)
989 return 0;
990 /* Level 3: forward secure ciphersuites only */
991 if (level >= 3 && c->min_tls != TLS1_3_VERSION &&
992 !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
993 return 0;
994 break;
995 }
996 case SSL_SECOP_VERSION:
997 if (!SSL_IS_DTLS(s)) {
998 /* SSLv3 not allowed at level 2 */
999 if (nid <= SSL3_VERSION && level >= 2)
1000 return 0;
1001 /* TLS v1.1 and above only for level 3 */
1002 if (nid <= TLS1_VERSION && level >= 3)
1003 return 0;
1004 /* TLS v1.2 only for level 4 and above */
1005 if (nid <= TLS1_1_VERSION && level >= 4)
1006 return 0;
1007 } else {
1008 /* DTLS v1.2 only for level 4 and above */
1009 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1010 return 0;
1011 }
1012 break;
1013
1014 case SSL_SECOP_COMPRESSION:
1015 if (level >= 2)
1016 return 0;
1017 break;
1018 case SSL_SECOP_TICKET:
1019 if (level >= 3)
1020 return 0;
1021 break;
1022 default:
1023 if (bits < minbits)
1024 return 0;
1025 }
1026 return 1;
1027}
1028
1029int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
1030{
1031 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1032}
1033
1034int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1035{
1036 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,
1037 ctx->cert->sec_ex);
1038}
1039
1040int ssl_cert_lookup_by_nid(int nid, size_t *pidx)
1041{
1042 size_t i;
1043
1044 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1045 if (ssl_cert_info[i].nid == nid) {
1046 *pidx = i;
1047 return 1;
1048 }
1049 }
1050
1051 return 0;
1052}
1053
1054const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx)
1055{
1056 int nid = EVP_PKEY_id(pk);
1057 size_t tmpidx;
1058
1059 if (nid == NID_undef)
1060 return NULL;
1061
1062 if (!ssl_cert_lookup_by_nid(nid, &tmpidx))
1063 return NULL;
1064
1065 if (pidx != NULL)
1066 *pidx = tmpidx;
1067
1068 return &ssl_cert_info[tmpidx];
1069}
1070
1071const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx)
1072{
1073 if (idx >= OSSL_NELEM(ssl_cert_info))
1074 return NULL;
1075 return &ssl_cert_info[idx];
1076}
1077