1 /*
2 * Copyright 1995-2023 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 #ifndef OPENSSL_NO_POSIX_IO
28 # include <sys/stat.h>
29 # ifdef _WIN32
30 # define stat _stat
31 # endif
32 # ifndef S_ISDIR
33 # define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
34 # endif
35 #endif
36
37
38 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
39 int op, int bits, int nid, void *other,
40 void *ex);
41
42 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
43 static volatile int ssl_x509_store_ctx_idx = -1;
44
DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)45 DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)
46 {
47 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
48 "SSL for verify callback",
49 NULL, NULL, NULL);
50 return ssl_x509_store_ctx_idx >= 0;
51 }
52
SSL_get_ex_data_X509_STORE_CTX_idx(void)53 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
54 {
55
56 if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init))
57 return -1;
58 return ssl_x509_store_ctx_idx;
59 }
60
ssl_cert_new(void)61 CERT *ssl_cert_new(void)
62 {
63 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
64
65 if (ret == NULL) {
66 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
67 return NULL;
68 }
69
70 ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
71 ret->references = 1;
72 ret->sec_cb = ssl_security_default_callback;
73 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
74 ret->sec_ex = NULL;
75 ret->lock = CRYPTO_THREAD_lock_new();
76 if (ret->lock == NULL) {
77 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
78 OPENSSL_free(ret);
79 return NULL;
80 }
81
82 return ret;
83 }
84
ssl_cert_dup(CERT * cert)85 CERT *ssl_cert_dup(CERT *cert)
86 {
87 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
88 int i;
89
90 if (ret == NULL) {
91 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
92 return NULL;
93 }
94
95 ret->references = 1;
96 ret->key = &ret->pkeys[cert->key - cert->pkeys];
97 ret->lock = CRYPTO_THREAD_lock_new();
98 if (ret->lock == NULL) {
99 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
100 OPENSSL_free(ret);
101 return NULL;
102 }
103
104 if (cert->dh_tmp != NULL) {
105 ret->dh_tmp = cert->dh_tmp;
106 EVP_PKEY_up_ref(ret->dh_tmp);
107 }
108
109 ret->dh_tmp_cb = cert->dh_tmp_cb;
110 ret->dh_tmp_auto = cert->dh_tmp_auto;
111
112 for (i = 0; i < SSL_PKEY_NUM; i++) {
113 CERT_PKEY *cpk = cert->pkeys + i;
114 CERT_PKEY *rpk = ret->pkeys + i;
115 if (cpk->x509 != NULL) {
116 rpk->x509 = cpk->x509;
117 X509_up_ref(rpk->x509);
118 }
119
120 if (cpk->privatekey != NULL) {
121 rpk->privatekey = cpk->privatekey;
122 EVP_PKEY_up_ref(cpk->privatekey);
123 }
124
125 if (cpk->chain) {
126 rpk->chain = X509_chain_up_ref(cpk->chain);
127 if (!rpk->chain) {
128 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
129 goto err;
130 }
131 }
132 if (cert->pkeys[i].serverinfo != NULL) {
133 /* Just copy everything. */
134 ret->pkeys[i].serverinfo =
135 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
136 if (ret->pkeys[i].serverinfo == NULL) {
137 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
138 goto err;
139 }
140 ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length;
141 memcpy(ret->pkeys[i].serverinfo,
142 cert->pkeys[i].serverinfo, cert->pkeys[i].serverinfo_length);
143 }
144 }
145
146 /* Configured sigalgs copied across */
147 if (cert->conf_sigalgs) {
148 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
149 * sizeof(*cert->conf_sigalgs));
150 if (ret->conf_sigalgs == NULL)
151 goto err;
152 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
153 cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs));
154 ret->conf_sigalgslen = cert->conf_sigalgslen;
155 } else
156 ret->conf_sigalgs = NULL;
157
158 if (cert->client_sigalgs) {
159 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen
160 * sizeof(*cert->client_sigalgs));
161 if (ret->client_sigalgs == NULL)
162 goto err;
163 memcpy(ret->client_sigalgs, cert->client_sigalgs,
164 cert->client_sigalgslen * sizeof(*cert->client_sigalgs));
165 ret->client_sigalgslen = cert->client_sigalgslen;
166 } else
167 ret->client_sigalgs = NULL;
168 /* Copy any custom client certificate types */
169 if (cert->ctype) {
170 ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len);
171 if (ret->ctype == NULL)
172 goto err;
173 ret->ctype_len = cert->ctype_len;
174 }
175
176 ret->cert_flags = cert->cert_flags;
177
178 ret->cert_cb = cert->cert_cb;
179 ret->cert_cb_arg = cert->cert_cb_arg;
180
181 if (cert->verify_store) {
182 X509_STORE_up_ref(cert->verify_store);
183 ret->verify_store = cert->verify_store;
184 }
185
186 if (cert->chain_store) {
187 X509_STORE_up_ref(cert->chain_store);
188 ret->chain_store = cert->chain_store;
189 }
190
191 ret->sec_cb = cert->sec_cb;
192 ret->sec_level = cert->sec_level;
193 ret->sec_ex = cert->sec_ex;
194
195 if (!custom_exts_copy(&ret->custext, &cert->custext))
196 goto err;
197 #ifndef OPENSSL_NO_PSK
198 if (cert->psk_identity_hint) {
199 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
200 if (ret->psk_identity_hint == NULL)
201 goto err;
202 }
203 #endif
204 return ret;
205
206 err:
207 ssl_cert_free(ret);
208
209 return NULL;
210 }
211
212 /* Free up and clear all certificates and chains */
213
ssl_cert_clear_certs(CERT * c)214 void ssl_cert_clear_certs(CERT *c)
215 {
216 int i;
217 if (c == NULL)
218 return;
219 for (i = 0; i < SSL_PKEY_NUM; i++) {
220 CERT_PKEY *cpk = c->pkeys + i;
221 X509_free(cpk->x509);
222 cpk->x509 = NULL;
223 EVP_PKEY_free(cpk->privatekey);
224 cpk->privatekey = NULL;
225 sk_X509_pop_free(cpk->chain, X509_free);
226 cpk->chain = NULL;
227 OPENSSL_free(cpk->serverinfo);
228 cpk->serverinfo = NULL;
229 cpk->serverinfo_length = 0;
230 }
231 }
232
ssl_cert_free(CERT * c)233 void ssl_cert_free(CERT *c)
234 {
235 int i;
236
237 if (c == NULL)
238 return;
239 CRYPTO_DOWN_REF(&c->references, &i, c->lock);
240 REF_PRINT_COUNT("CERT", c);
241 if (i > 0)
242 return;
243 REF_ASSERT_ISNT(i < 0);
244
245 EVP_PKEY_free(c->dh_tmp);
246
247 ssl_cert_clear_certs(c);
248 OPENSSL_free(c->conf_sigalgs);
249 OPENSSL_free(c->client_sigalgs);
250 OPENSSL_free(c->ctype);
251 X509_STORE_free(c->verify_store);
252 X509_STORE_free(c->chain_store);
253 custom_exts_free(&c->custext);
254 #ifndef OPENSSL_NO_PSK
255 OPENSSL_free(c->psk_identity_hint);
256 #endif
257 CRYPTO_THREAD_lock_free(c->lock);
258 OPENSSL_free(c);
259 }
260
ssl_cert_set0_chain(SSL * s,SSL_CTX * ctx,STACK_OF (X509)* chain)261 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
262 {
263 int i, r;
264 CERT_PKEY *cpk = s != NULL ? s->cert->key : ctx->cert->key;
265
266 if (!cpk)
267 return 0;
268 for (i = 0; i < sk_X509_num(chain); i++) {
269 X509 *x = sk_X509_value(chain, i);
270
271 r = ssl_security_cert(s, ctx, x, 0, 0);
272 if (r != 1) {
273 ERR_raise(ERR_LIB_SSL, r);
274 return 0;
275 }
276 }
277 sk_X509_pop_free(cpk->chain, X509_free);
278 cpk->chain = chain;
279 return 1;
280 }
281
ssl_cert_set1_chain(SSL * s,SSL_CTX * ctx,STACK_OF (X509)* chain)282 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
283 {
284 STACK_OF(X509) *dchain;
285 if (!chain)
286 return ssl_cert_set0_chain(s, ctx, NULL);
287 dchain = X509_chain_up_ref(chain);
288 if (!dchain)
289 return 0;
290 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
291 sk_X509_pop_free(dchain, X509_free);
292 return 0;
293 }
294 return 1;
295 }
296
ssl_cert_add0_chain_cert(SSL * s,SSL_CTX * ctx,X509 * x)297 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
298 {
299 int r;
300 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
301 if (!cpk)
302 return 0;
303 r = ssl_security_cert(s, ctx, x, 0, 0);
304 if (r != 1) {
305 ERR_raise(ERR_LIB_SSL, r);
306 return 0;
307 }
308 if (!cpk->chain)
309 cpk->chain = sk_X509_new_null();
310 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
311 return 0;
312 return 1;
313 }
314
ssl_cert_add1_chain_cert(SSL * s,SSL_CTX * ctx,X509 * x)315 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
316 {
317 if (!ssl_cert_add0_chain_cert(s, ctx, x))
318 return 0;
319 X509_up_ref(x);
320 return 1;
321 }
322
ssl_cert_select_current(CERT * c,X509 * x)323 int ssl_cert_select_current(CERT *c, X509 *x)
324 {
325 int i;
326 if (x == NULL)
327 return 0;
328 for (i = 0; i < SSL_PKEY_NUM; i++) {
329 CERT_PKEY *cpk = c->pkeys + i;
330 if (cpk->x509 == x && cpk->privatekey) {
331 c->key = cpk;
332 return 1;
333 }
334 }
335
336 for (i = 0; i < SSL_PKEY_NUM; i++) {
337 CERT_PKEY *cpk = c->pkeys + i;
338 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
339 c->key = cpk;
340 return 1;
341 }
342 }
343 return 0;
344 }
345
ssl_cert_set_current(CERT * c,long op)346 int ssl_cert_set_current(CERT *c, long op)
347 {
348 int i, idx;
349 if (!c)
350 return 0;
351 if (op == SSL_CERT_SET_FIRST)
352 idx = 0;
353 else if (op == SSL_CERT_SET_NEXT) {
354 idx = (int)(c->key - c->pkeys + 1);
355 if (idx >= SSL_PKEY_NUM)
356 return 0;
357 } else
358 return 0;
359 for (i = idx; i < SSL_PKEY_NUM; i++) {
360 CERT_PKEY *cpk = c->pkeys + i;
361 if (cpk->x509 && cpk->privatekey) {
362 c->key = cpk;
363 return 1;
364 }
365 }
366 return 0;
367 }
368
ssl_cert_set_cert_cb(CERT * c,int (* cb)(SSL * ssl,void * arg),void * arg)369 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
370 {
371 c->cert_cb = cb;
372 c->cert_cb_arg = arg;
373 }
374
375 /*
376 * Verify a certificate chain
377 * Return codes:
378 * 1: Verify success
379 * 0: Verify failure or error
380 * -1: Retry required
381 */
ssl_verify_cert_chain(SSL * s,STACK_OF (X509)* sk)382 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
383 {
384 X509 *x;
385 int i = 0;
386 X509_STORE *verify_store;
387 X509_STORE_CTX *ctx = NULL;
388 X509_VERIFY_PARAM *param;
389
390 if ((sk == NULL) || (sk_X509_num(sk) == 0))
391 return 0;
392
393 if (s->cert->verify_store)
394 verify_store = s->cert->verify_store;
395 else
396 verify_store = s->ctx->cert_store;
397
398 ctx = X509_STORE_CTX_new_ex(s->ctx->libctx, s->ctx->propq);
399 if (ctx == NULL) {
400 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
401 return 0;
402 }
403
404 x = sk_X509_value(sk, 0);
405 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
406 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
407 goto end;
408 }
409 param = X509_STORE_CTX_get0_param(ctx);
410 /*
411 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
412 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
413 * and PKI authentication.
414 */
415 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));
416
417 /* Set suite B flags if needed */
418 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
419 if (!X509_STORE_CTX_set_ex_data
420 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
421 goto end;
422 }
423
424 /* Verify via DANE if enabled */
425 if (DANETLS_ENABLED(&s->dane))
426 X509_STORE_CTX_set0_dane(ctx, &s->dane);
427
428 /*
429 * We need to inherit the verify parameters. These can be determined by
430 * the context: if its a server it will verify SSL client certificates or
431 * vice versa.
432 */
433
434 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
435 /*
436 * Anything non-default in "s->param" should overwrite anything in the ctx.
437 */
438 X509_VERIFY_PARAM_set1(param, s->param);
439
440 if (s->verify_callback)
441 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
442
443 if (s->ctx->app_verify_callback != NULL) {
444 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
445 } else {
446 i = X509_verify_cert(ctx);
447 /* We treat an error in the same way as a failure to verify */
448 if (i < 0)
449 i = 0;
450 }
451
452 s->verify_result = X509_STORE_CTX_get_error(ctx);
453 sk_X509_pop_free(s->verified_chain, X509_free);
454 s->verified_chain = NULL;
455 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
456 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
457 if (s->verified_chain == NULL) {
458 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
459 i = 0;
460 }
461 }
462
463 /* Move peername from the store context params to the SSL handle's */
464 X509_VERIFY_PARAM_move_peername(s->param, param);
465
466 end:
467 X509_STORE_CTX_free(ctx);
468 return i;
469 }
470
set0_CA_list(STACK_OF (X509_NAME)** ca_list,STACK_OF (X509_NAME)* name_list)471 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list,
472 STACK_OF(X509_NAME) *name_list)
473 {
474 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
475 *ca_list = name_list;
476 }
477
STACK_OF(X509_NAME)478 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
479 {
480 int i;
481 const int num = sk_X509_NAME_num(sk);
482 STACK_OF(X509_NAME) *ret;
483 X509_NAME *name;
484
485 ret = sk_X509_NAME_new_reserve(NULL, num);
486 if (ret == NULL) {
487 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
488 return NULL;
489 }
490 for (i = 0; i < num; i++) {
491 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
492 if (name == NULL) {
493 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
494 sk_X509_NAME_pop_free(ret, X509_NAME_free);
495 return NULL;
496 }
497 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */
498 }
499 return ret;
500 }
501
SSL_set0_CA_list(SSL * s,STACK_OF (X509_NAME)* name_list)502 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
503 {
504 set0_CA_list(&s->ca_names, name_list);
505 }
506
SSL_CTX_set0_CA_list(SSL_CTX * ctx,STACK_OF (X509_NAME)* name_list)507 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
508 {
509 set0_CA_list(&ctx->ca_names, name_list);
510 }
511
STACK_OF(X509_NAME)512 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx)
513 {
514 return ctx->ca_names;
515 }
516
STACK_OF(X509_NAME)517 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s)
518 {
519 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names;
520 }
521
SSL_CTX_set_client_CA_list(SSL_CTX * ctx,STACK_OF (X509_NAME)* name_list)522 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
523 {
524 set0_CA_list(&ctx->client_ca_names, name_list);
525 }
526
STACK_OF(X509_NAME)527 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
528 {
529 return ctx->client_ca_names;
530 }
531
SSL_set_client_CA_list(SSL * s,STACK_OF (X509_NAME)* name_list)532 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
533 {
534 set0_CA_list(&s->client_ca_names, name_list);
535 }
536
STACK_OF(X509_NAME)537 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s)
538 {
539 return s->s3.tmp.peer_ca_names;
540 }
541
STACK_OF(X509_NAME)542 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
543 {
544 if (!s->server)
545 return s->s3.tmp.peer_ca_names;
546 return s->client_ca_names != NULL ? s->client_ca_names
547 : s->ctx->client_ca_names;
548 }
549
add_ca_name(STACK_OF (X509_NAME)** sk,const X509 * x)550 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x)
551 {
552 X509_NAME *name;
553
554 if (x == NULL)
555 return 0;
556 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL))
557 return 0;
558
559 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
560 return 0;
561
562 if (!sk_X509_NAME_push(*sk, name)) {
563 X509_NAME_free(name);
564 return 0;
565 }
566 return 1;
567 }
568
SSL_add1_to_CA_list(SSL * ssl,const X509 * x)569 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x)
570 {
571 return add_ca_name(&ssl->ca_names, x);
572 }
573
SSL_CTX_add1_to_CA_list(SSL_CTX * ctx,const X509 * x)574 int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x)
575 {
576 return add_ca_name(&ctx->ca_names, x);
577 }
578
579 /*
580 * The following two are older names are to be replaced with
581 * SSL(_CTX)_add1_to_CA_list
582 */
SSL_add_client_CA(SSL * ssl,X509 * x)583 int SSL_add_client_CA(SSL *ssl, X509 *x)
584 {
585 return add_ca_name(&ssl->client_ca_names, x);
586 }
587
SSL_CTX_add_client_CA(SSL_CTX * ctx,X509 * x)588 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
589 {
590 return add_ca_name(&ctx->client_ca_names, x);
591 }
592
xname_cmp(const X509_NAME * a,const X509_NAME * b)593 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
594 {
595 unsigned char *abuf = NULL, *bbuf = NULL;
596 int alen, blen, ret;
597
598 /* X509_NAME_cmp() itself casts away constness in this way, so
599 * assume it's safe:
600 */
601 alen = i2d_X509_NAME((X509_NAME *)a, &abuf);
602 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf);
603
604 if (alen < 0 || blen < 0)
605 ret = -2;
606 else if (alen != blen)
607 ret = alen - blen;
608 else /* alen == blen */
609 ret = memcmp(abuf, bbuf, alen);
610
611 OPENSSL_free(abuf);
612 OPENSSL_free(bbuf);
613
614 return ret;
615 }
616
xname_sk_cmp(const X509_NAME * const * a,const X509_NAME * const * b)617 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
618 {
619 return xname_cmp(*a, *b);
620 }
621
xname_hash(const X509_NAME * a)622 static unsigned long xname_hash(const X509_NAME *a)
623 {
624 /* This returns 0 also if SHA1 is not available */
625 return X509_NAME_hash_ex((X509_NAME *)a, NULL, NULL, NULL);
626 }
627
STACK_OF(X509_NAME)628 STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file,
629 OSSL_LIB_CTX *libctx,
630 const char *propq)
631 {
632 BIO *in = BIO_new(BIO_s_file());
633 X509 *x = NULL;
634 X509_NAME *xn = NULL;
635 STACK_OF(X509_NAME) *ret = NULL;
636 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
637 OSSL_LIB_CTX *prev_libctx = NULL;
638
639 if ((name_hash == NULL) || (in == NULL)) {
640 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
641 goto err;
642 }
643
644 x = X509_new_ex(libctx, propq);
645 if (x == NULL) {
646 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
647 goto err;
648 }
649 if (BIO_read_filename(in, file) <= 0)
650 goto err;
651
652 /* Internally lh_X509_NAME_retrieve() needs the libctx to retrieve SHA1 */
653 prev_libctx = OSSL_LIB_CTX_set0_default(libctx);
654 for (;;) {
655 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
656 break;
657 if (ret == NULL) {
658 ret = sk_X509_NAME_new_null();
659 if (ret == NULL) {
660 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
661 goto err;
662 }
663 }
664 if ((xn = X509_get_subject_name(x)) == NULL)
665 goto err;
666 /* check for duplicates */
667 xn = X509_NAME_dup(xn);
668 if (xn == NULL)
669 goto err;
670 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
671 /* Duplicate. */
672 X509_NAME_free(xn);
673 xn = NULL;
674 } else {
675 lh_X509_NAME_insert(name_hash, xn);
676 if (!sk_X509_NAME_push(ret, xn))
677 goto err;
678 }
679 }
680 goto done;
681
682 err:
683 X509_NAME_free(xn);
684 sk_X509_NAME_pop_free(ret, X509_NAME_free);
685 ret = NULL;
686 done:
687 /* restore the old libctx */
688 OSSL_LIB_CTX_set0_default(prev_libctx);
689 BIO_free(in);
690 X509_free(x);
691 lh_X509_NAME_free(name_hash);
692 if (ret != NULL)
693 ERR_clear_error();
694 return ret;
695 }
696
STACK_OF(X509_NAME)697 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
698 {
699 return SSL_load_client_CA_file_ex(file, NULL, NULL);
700 }
701
SSL_add_file_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * file)702 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
703 const char *file)
704 {
705 BIO *in;
706 X509 *x = NULL;
707 X509_NAME *xn = NULL;
708 int ret = 1;
709 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
710
711 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
712
713 in = BIO_new(BIO_s_file());
714
715 if (in == NULL) {
716 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
717 goto err;
718 }
719
720 if (BIO_read_filename(in, file) <= 0)
721 goto err;
722
723 for (;;) {
724 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
725 break;
726 if ((xn = X509_get_subject_name(x)) == NULL)
727 goto err;
728 xn = X509_NAME_dup(xn);
729 if (xn == NULL)
730 goto err;
731 if (sk_X509_NAME_find(stack, xn) >= 0) {
732 /* Duplicate. */
733 X509_NAME_free(xn);
734 } else if (!sk_X509_NAME_push(stack, xn)) {
735 X509_NAME_free(xn);
736 goto err;
737 }
738 }
739
740 ERR_clear_error();
741 goto done;
742
743 err:
744 ret = 0;
745 done:
746 BIO_free(in);
747 X509_free(x);
748 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
749 return ret;
750 }
751
SSL_add_dir_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * dir)752 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
753 const char *dir)
754 {
755 OPENSSL_DIR_CTX *d = NULL;
756 const char *filename;
757 int ret = 0;
758
759 /* Note that a side effect is that the CAs will be sorted by name */
760
761 while ((filename = OPENSSL_DIR_read(&d, dir))) {
762 char buf[1024];
763 int r;
764 #ifndef OPENSSL_NO_POSIX_IO
765 struct stat st;
766
767 #else
768 /* Cannot use stat so just skip current and parent directories */
769 if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0)
770 continue;
771 #endif
772 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) {
773 ERR_raise(ERR_LIB_SSL, SSL_R_PATH_TOO_LONG);
774 goto err;
775 }
776 #ifdef OPENSSL_SYS_VMS
777 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename);
778 #else
779 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename);
780 #endif
781 #ifndef OPENSSL_NO_POSIX_IO
782 /* Skip subdirectories */
783 if (!stat(buf, &st) && S_ISDIR(st.st_mode))
784 continue;
785 #endif
786 if (r <= 0 || r >= (int)sizeof(buf))
787 goto err;
788 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
789 goto err;
790 }
791
792 if (errno) {
793 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
794 "calling OPENSSL_dir_read(%s)", dir);
795 ERR_raise(ERR_LIB_SSL, ERR_R_SYS_LIB);
796 goto err;
797 }
798
799 ret = 1;
800
801 err:
802 if (d)
803 OPENSSL_DIR_end(&d);
804
805 return ret;
806 }
807
add_uris_recursive(STACK_OF (X509_NAME)* stack,const char * uri,int depth)808 static int add_uris_recursive(STACK_OF(X509_NAME) *stack,
809 const char *uri, int depth)
810 {
811 int ok = 1;
812 OSSL_STORE_CTX *ctx = NULL;
813 X509 *x = NULL;
814 X509_NAME *xn = NULL;
815
816 if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL)
817 goto err;
818
819 while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) {
820 OSSL_STORE_INFO *info = OSSL_STORE_load(ctx);
821 int infotype = info == 0 ? 0 : OSSL_STORE_INFO_get_type(info);
822
823 if (info == NULL)
824 continue;
825
826 if (infotype == OSSL_STORE_INFO_NAME) {
827 /*
828 * This is an entry in the "directory" represented by the current
829 * uri. if |depth| allows, dive into it.
830 */
831 if (depth > 0)
832 ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info),
833 depth - 1);
834 } else if (infotype == OSSL_STORE_INFO_CERT) {
835 if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL
836 || (xn = X509_get_subject_name(x)) == NULL
837 || (xn = X509_NAME_dup(xn)) == NULL)
838 goto err;
839 if (sk_X509_NAME_find(stack, xn) >= 0) {
840 /* Duplicate. */
841 X509_NAME_free(xn);
842 } else if (!sk_X509_NAME_push(stack, xn)) {
843 X509_NAME_free(xn);
844 goto err;
845 }
846 }
847
848 OSSL_STORE_INFO_free(info);
849 }
850
851 ERR_clear_error();
852 goto done;
853
854 err:
855 ok = 0;
856 done:
857 OSSL_STORE_close(ctx);
858
859 return ok;
860 }
861
SSL_add_store_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * store)862 int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
863 const char *store)
864 {
865 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b)
866 = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
867 int ret = add_uris_recursive(stack, store, 1);
868
869 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
870 return ret;
871 }
872
873 /* Build a certificate chain for current certificate */
ssl_build_cert_chain(SSL * s,SSL_CTX * ctx,int flags)874 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
875 {
876 CERT *c = s ? s->cert : ctx->cert;
877 CERT_PKEY *cpk = c->key;
878 X509_STORE *chain_store = NULL;
879 X509_STORE_CTX *xs_ctx = NULL;
880 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
881 X509 *x;
882 SSL_CTX *real_ctx = (s == NULL) ? ctx : s->ctx;
883 int i, rv = 0;
884
885 if (!cpk->x509) {
886 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_SET);
887 goto err;
888 }
889 /* Rearranging and check the chain: add everything to a store */
890 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
891 chain_store = X509_STORE_new();
892 if (chain_store == NULL)
893 goto err;
894 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
895 x = sk_X509_value(cpk->chain, i);
896 if (!X509_STORE_add_cert(chain_store, x))
897 goto err;
898 }
899 /* Add EE cert too: it might be self signed */
900 if (!X509_STORE_add_cert(chain_store, cpk->x509))
901 goto err;
902 } else {
903 if (c->chain_store)
904 chain_store = c->chain_store;
905 else if (s)
906 chain_store = s->ctx->cert_store;
907 else
908 chain_store = ctx->cert_store;
909
910 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
911 untrusted = cpk->chain;
912 }
913
914 xs_ctx = X509_STORE_CTX_new_ex(real_ctx->libctx, real_ctx->propq);
915 if (xs_ctx == NULL) {
916 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
917 goto err;
918 }
919 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
920 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
921 goto err;
922 }
923 /* Set suite B flags if needed */
924 X509_STORE_CTX_set_flags(xs_ctx,
925 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
926
927 i = X509_verify_cert(xs_ctx);
928 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
929 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
930 ERR_clear_error();
931 i = 1;
932 rv = 2;
933 }
934 if (i > 0)
935 chain = X509_STORE_CTX_get1_chain(xs_ctx);
936 if (i <= 0) {
937 i = X509_STORE_CTX_get_error(xs_ctx);
938 ERR_raise_data(ERR_LIB_SSL, SSL_R_CERTIFICATE_VERIFY_FAILED,
939 "Verify error:%s", X509_verify_cert_error_string(i));
940
941 goto err;
942 }
943 /* Remove EE certificate from chain */
944 x = sk_X509_shift(chain);
945 X509_free(x);
946 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
947 if (sk_X509_num(chain) > 0) {
948 /* See if last cert is self signed */
949 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
950 if (X509_get_extension_flags(x) & EXFLAG_SS) {
951 x = sk_X509_pop(chain);
952 X509_free(x);
953 }
954 }
955 }
956 /*
957 * Check security level of all CA certificates: EE will have been checked
958 * already.
959 */
960 for (i = 0; i < sk_X509_num(chain); i++) {
961 x = sk_X509_value(chain, i);
962 rv = ssl_security_cert(s, ctx, x, 0, 0);
963 if (rv != 1) {
964 ERR_raise(ERR_LIB_SSL, rv);
965 sk_X509_pop_free(chain, X509_free);
966 rv = 0;
967 goto err;
968 }
969 }
970 sk_X509_pop_free(cpk->chain, X509_free);
971 cpk->chain = chain;
972 if (rv == 0)
973 rv = 1;
974 err:
975 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
976 X509_STORE_free(chain_store);
977 X509_STORE_CTX_free(xs_ctx);
978
979 return rv;
980 }
981
ssl_cert_set_cert_store(CERT * c,X509_STORE * store,int chain,int ref)982 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
983 {
984 X509_STORE **pstore;
985 if (chain)
986 pstore = &c->chain_store;
987 else
988 pstore = &c->verify_store;
989 X509_STORE_free(*pstore);
990 *pstore = store;
991 if (ref && store)
992 X509_STORE_up_ref(store);
993 return 1;
994 }
995
ssl_cert_get_cert_store(CERT * c,X509_STORE ** pstore,int chain)996 int ssl_cert_get_cert_store(CERT *c, X509_STORE **pstore, int chain)
997 {
998 *pstore = (chain ? c->chain_store : c->verify_store);
999 return 1;
1000 }
1001
ssl_get_security_level_bits(const SSL * s,const SSL_CTX * ctx,int * levelp)1002 int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp)
1003 {
1004 int level;
1005 /*
1006 * note that there's a corresponding minbits_table
1007 * in crypto/x509/x509_vfy.c that's used for checking the security level
1008 * of RSA and DSA keys
1009 */
1010 static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 };
1011
1012 if (ctx != NULL)
1013 level = SSL_CTX_get_security_level(ctx);
1014 else
1015 level = SSL_get_security_level(s);
1016
1017 if (level > 5)
1018 level = 5;
1019 else if (level < 0)
1020 level = 0;
1021
1022 if (levelp != NULL)
1023 *levelp = level;
1024
1025 return minbits_table[level];
1026 }
1027
ssl_security_default_callback(const SSL * s,const SSL_CTX * ctx,int op,int bits,int nid,void * other,void * ex)1028 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
1029 int op, int bits, int nid, void *other,
1030 void *ex)
1031 {
1032 int level, minbits, pfs_mask;
1033
1034 minbits = ssl_get_security_level_bits(s, ctx, &level);
1035
1036 if (level == 0) {
1037 /*
1038 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1039 * anything goes.
1040 */
1041 if (op == SSL_SECOP_TMP_DH && bits < 80)
1042 return 0;
1043 return 1;
1044 }
1045 switch (op) {
1046 case SSL_SECOP_CIPHER_SUPPORTED:
1047 case SSL_SECOP_CIPHER_SHARED:
1048 case SSL_SECOP_CIPHER_CHECK:
1049 {
1050 const SSL_CIPHER *c = other;
1051 /* No ciphers below security level */
1052 if (bits < minbits)
1053 return 0;
1054 /* No unauthenticated ciphersuites */
1055 if (c->algorithm_auth & SSL_aNULL)
1056 return 0;
1057 /* No MD5 mac ciphersuites */
1058 if (c->algorithm_mac & SSL_MD5)
1059 return 0;
1060 /* SHA1 HMAC is 160 bits of security */
1061 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1062 return 0;
1063 /* Level 2: no RC4 */
1064 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1065 return 0;
1066 /* Level 3: forward secure ciphersuites only */
1067 pfs_mask = SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK;
1068 if (level >= 3 && c->min_tls != TLS1_3_VERSION &&
1069 !(c->algorithm_mkey & pfs_mask))
1070 return 0;
1071 break;
1072 }
1073 case SSL_SECOP_VERSION:
1074 if (!SSL_IS_DTLS(s)) {
1075 /* SSLv3 not allowed at level 2 */
1076 if (nid <= SSL3_VERSION && level >= 2)
1077 return 0;
1078 /* TLS v1.1 and above only for level 3 */
1079 if (nid <= TLS1_VERSION && level >= 3)
1080 return 0;
1081 /* TLS v1.2 only for level 4 and above */
1082 if (nid <= TLS1_1_VERSION && level >= 4)
1083 return 0;
1084 } else {
1085 /* DTLS v1.2 only for level 4 and above */
1086 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1087 return 0;
1088 }
1089 break;
1090
1091 case SSL_SECOP_COMPRESSION:
1092 if (level >= 2)
1093 return 0;
1094 break;
1095 case SSL_SECOP_TICKET:
1096 if (level >= 3)
1097 return 0;
1098 break;
1099 default:
1100 if (bits < minbits)
1101 return 0;
1102 }
1103 return 1;
1104 }
1105
ssl_security(const SSL * s,int op,int bits,int nid,void * other)1106 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
1107 {
1108 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1109 }
1110
ssl_ctx_security(const SSL_CTX * ctx,int op,int bits,int nid,void * other)1111 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1112 {
1113 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,
1114 ctx->cert->sec_ex);
1115 }
1116
ssl_cert_lookup_by_nid(int nid,size_t * pidx)1117 int ssl_cert_lookup_by_nid(int nid, size_t *pidx)
1118 {
1119 size_t i;
1120
1121 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1122 if (ssl_cert_info[i].nid == nid) {
1123 *pidx = i;
1124 return 1;
1125 }
1126 }
1127
1128 return 0;
1129 }
1130
ssl_cert_lookup_by_pkey(const EVP_PKEY * pk,size_t * pidx)1131 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx)
1132 {
1133 size_t i;
1134
1135 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1136 const SSL_CERT_LOOKUP *tmp_lu = &ssl_cert_info[i];
1137
1138 if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid))
1139 || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) {
1140 if (pidx != NULL)
1141 *pidx = i;
1142 return tmp_lu;
1143 }
1144 }
1145
1146 return NULL;
1147 }
1148
ssl_cert_lookup_by_idx(size_t idx)1149 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx)
1150 {
1151 if (idx >= OSSL_NELEM(ssl_cert_info))
1152 return NULL;
1153 return &ssl_cert_info[idx];
1154 }
1155