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 OpenSSL license (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11 #include <stdio.h>
12 #include <sys/types.h>
13
14 #include "internal/nelem.h"
15 #include "internal/o_dir.h"
16 #include <openssl/bio.h>
17 #include <openssl/pem.h>
18 #include <openssl/x509v3.h>
19 #include <openssl/dh.h>
20 #include <openssl/bn.h>
21 #include <openssl/crypto.h>
22 #include "internal/refcount.h"
23 #include "ssl_local.h"
24 #include "ssl_cert_table.h"
25 #include "internal/thread_once.h"
26
27 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
28 int op, int bits, int nid, void *other,
29 void *ex);
30
31 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
32 static volatile int ssl_x509_store_ctx_idx = -1;
33
DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)34 DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)
35 {
36 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
37 "SSL for verify callback",
38 NULL, NULL, NULL);
39 return ssl_x509_store_ctx_idx >= 0;
40 }
41
SSL_get_ex_data_X509_STORE_CTX_idx(void)42 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
43 {
44
45 if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init))
46 return -1;
47 return ssl_x509_store_ctx_idx;
48 }
49
ssl_cert_new(void)50 CERT *ssl_cert_new(void)
51 {
52 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
53
54 if (ret == NULL) {
55 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
56 return NULL;
57 }
58
59 ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
60 ret->references = 1;
61 ret->sec_cb = ssl_security_default_callback;
62 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
63 ret->sec_ex = NULL;
64 ret->lock = CRYPTO_THREAD_lock_new();
65 if (ret->lock == NULL) {
66 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
67 OPENSSL_free(ret);
68 return NULL;
69 }
70
71 return ret;
72 }
73
ssl_cert_dup(CERT * cert)74 CERT *ssl_cert_dup(CERT *cert)
75 {
76 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
77 int i;
78
79 if (ret == NULL) {
80 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
81 return NULL;
82 }
83
84 ret->references = 1;
85 ret->key = &ret->pkeys[cert->key - cert->pkeys];
86 ret->lock = CRYPTO_THREAD_lock_new();
87 if (ret->lock == NULL) {
88 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
89 OPENSSL_free(ret);
90 return NULL;
91 }
92 #ifndef OPENSSL_NO_DH
93 if (cert->dh_tmp != NULL) {
94 ret->dh_tmp = cert->dh_tmp;
95 EVP_PKEY_up_ref(ret->dh_tmp);
96 }
97 ret->dh_tmp_cb = cert->dh_tmp_cb;
98 ret->dh_tmp_auto = cert->dh_tmp_auto;
99 #endif
100
101 for (i = 0; i < SSL_PKEY_NUM; i++) {
102 CERT_PKEY *cpk = cert->pkeys + i;
103 CERT_PKEY *rpk = ret->pkeys + i;
104 if (cpk->x509 != NULL) {
105 rpk->x509 = cpk->x509;
106 X509_up_ref(rpk->x509);
107 }
108
109 if (cpk->privatekey != NULL) {
110 rpk->privatekey = cpk->privatekey;
111 EVP_PKEY_up_ref(cpk->privatekey);
112 }
113
114 if (cpk->chain) {
115 rpk->chain = X509_chain_up_ref(cpk->chain);
116 if (!rpk->chain) {
117 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
118 goto err;
119 }
120 }
121 if (cert->pkeys[i].serverinfo != NULL) {
122 /* Just copy everything. */
123 ret->pkeys[i].serverinfo =
124 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
125 if (ret->pkeys[i].serverinfo == NULL) {
126 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
127 goto err;
128 }
129 ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length;
130 memcpy(ret->pkeys[i].serverinfo,
131 cert->pkeys[i].serverinfo, cert->pkeys[i].serverinfo_length);
132 }
133 }
134
135 /* Configured sigalgs copied across */
136 if (cert->conf_sigalgs) {
137 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
138 * sizeof(*cert->conf_sigalgs));
139 if (ret->conf_sigalgs == NULL)
140 goto err;
141 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
142 cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs));
143 ret->conf_sigalgslen = cert->conf_sigalgslen;
144 } else
145 ret->conf_sigalgs = NULL;
146
147 if (cert->client_sigalgs) {
148 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen
149 * sizeof(*cert->client_sigalgs));
150 if (ret->client_sigalgs == NULL)
151 goto err;
152 memcpy(ret->client_sigalgs, cert->client_sigalgs,
153 cert->client_sigalgslen * sizeof(*cert->client_sigalgs));
154 ret->client_sigalgslen = cert->client_sigalgslen;
155 } else
156 ret->client_sigalgs = NULL;
157 /* Copy any custom client certificate types */
158 if (cert->ctype) {
159 ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len);
160 if (ret->ctype == NULL)
161 goto err;
162 ret->ctype_len = cert->ctype_len;
163 }
164
165 ret->cert_flags = cert->cert_flags;
166
167 ret->cert_cb = cert->cert_cb;
168 ret->cert_cb_arg = cert->cert_cb_arg;
169
170 if (cert->verify_store) {
171 X509_STORE_up_ref(cert->verify_store);
172 ret->verify_store = cert->verify_store;
173 }
174
175 if (cert->chain_store) {
176 X509_STORE_up_ref(cert->chain_store);
177 ret->chain_store = cert->chain_store;
178 }
179
180 ret->sec_cb = cert->sec_cb;
181 ret->sec_level = cert->sec_level;
182 ret->sec_ex = cert->sec_ex;
183
184 if (!custom_exts_copy(&ret->custext, &cert->custext))
185 goto err;
186 #ifndef OPENSSL_NO_PSK
187 if (cert->psk_identity_hint) {
188 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
189 if (ret->psk_identity_hint == NULL)
190 goto err;
191 }
192 #endif
193 return ret;
194
195 err:
196 ssl_cert_free(ret);
197
198 return NULL;
199 }
200
201 /* Free up and clear all certificates and chains */
202
ssl_cert_clear_certs(CERT * c)203 void ssl_cert_clear_certs(CERT *c)
204 {
205 int i;
206 if (c == NULL)
207 return;
208 for (i = 0; i < SSL_PKEY_NUM; i++) {
209 CERT_PKEY *cpk = c->pkeys + i;
210 X509_free(cpk->x509);
211 cpk->x509 = NULL;
212 EVP_PKEY_free(cpk->privatekey);
213 cpk->privatekey = NULL;
214 sk_X509_pop_free(cpk->chain, X509_free);
215 cpk->chain = NULL;
216 OPENSSL_free(cpk->serverinfo);
217 cpk->serverinfo = NULL;
218 cpk->serverinfo_length = 0;
219 }
220 }
221
ssl_cert_free(CERT * c)222 void ssl_cert_free(CERT *c)
223 {
224 int i;
225
226 if (c == NULL)
227 return;
228 CRYPTO_DOWN_REF(&c->references, &i, c->lock);
229 REF_PRINT_COUNT("CERT", c);
230 if (i > 0)
231 return;
232 REF_ASSERT_ISNT(i < 0);
233
234 #ifndef OPENSSL_NO_DH
235 EVP_PKEY_free(c->dh_tmp);
236 #endif
237
238 ssl_cert_clear_certs(c);
239 OPENSSL_free(c->conf_sigalgs);
240 OPENSSL_free(c->client_sigalgs);
241 OPENSSL_free(c->ctype);
242 X509_STORE_free(c->verify_store);
243 X509_STORE_free(c->chain_store);
244 custom_exts_free(&c->custext);
245 #ifndef OPENSSL_NO_PSK
246 OPENSSL_free(c->psk_identity_hint);
247 #endif
248 CRYPTO_THREAD_lock_free(c->lock);
249 OPENSSL_free(c);
250 }
251
ssl_cert_set0_chain(SSL * s,SSL_CTX * ctx,STACK_OF (X509)* chain)252 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
253 {
254 int i, r;
255 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
256 if (!cpk)
257 return 0;
258 for (i = 0; i < sk_X509_num(chain); i++) {
259 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
260 if (r != 1) {
261 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
262 return 0;
263 }
264 }
265 sk_X509_pop_free(cpk->chain, X509_free);
266 cpk->chain = chain;
267 return 1;
268 }
269
ssl_cert_set1_chain(SSL * s,SSL_CTX * ctx,STACK_OF (X509)* chain)270 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
271 {
272 STACK_OF(X509) *dchain;
273 if (!chain)
274 return ssl_cert_set0_chain(s, ctx, NULL);
275 dchain = X509_chain_up_ref(chain);
276 if (!dchain)
277 return 0;
278 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
279 sk_X509_pop_free(dchain, X509_free);
280 return 0;
281 }
282 return 1;
283 }
284
ssl_cert_add0_chain_cert(SSL * s,SSL_CTX * ctx,X509 * x)285 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
286 {
287 int r;
288 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
289 if (!cpk)
290 return 0;
291 r = ssl_security_cert(s, ctx, x, 0, 0);
292 if (r != 1) {
293 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
294 return 0;
295 }
296 if (!cpk->chain)
297 cpk->chain = sk_X509_new_null();
298 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
299 return 0;
300 return 1;
301 }
302
ssl_cert_add1_chain_cert(SSL * s,SSL_CTX * ctx,X509 * x)303 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
304 {
305 if (!ssl_cert_add0_chain_cert(s, ctx, x))
306 return 0;
307 X509_up_ref(x);
308 return 1;
309 }
310
ssl_cert_select_current(CERT * c,X509 * x)311 int ssl_cert_select_current(CERT *c, X509 *x)
312 {
313 int i;
314 if (x == NULL)
315 return 0;
316 for (i = 0; i < SSL_PKEY_NUM; i++) {
317 CERT_PKEY *cpk = c->pkeys + i;
318 if (cpk->x509 == x && cpk->privatekey) {
319 c->key = cpk;
320 return 1;
321 }
322 }
323
324 for (i = 0; i < SSL_PKEY_NUM; i++) {
325 CERT_PKEY *cpk = c->pkeys + i;
326 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
327 c->key = cpk;
328 return 1;
329 }
330 }
331 return 0;
332 }
333
ssl_cert_set_current(CERT * c,long op)334 int ssl_cert_set_current(CERT *c, long op)
335 {
336 int i, idx;
337 if (!c)
338 return 0;
339 if (op == SSL_CERT_SET_FIRST)
340 idx = 0;
341 else if (op == SSL_CERT_SET_NEXT) {
342 idx = (int)(c->key - c->pkeys + 1);
343 if (idx >= SSL_PKEY_NUM)
344 return 0;
345 } else
346 return 0;
347 for (i = idx; i < SSL_PKEY_NUM; i++) {
348 CERT_PKEY *cpk = c->pkeys + i;
349 if (cpk->x509 && cpk->privatekey) {
350 c->key = cpk;
351 return 1;
352 }
353 }
354 return 0;
355 }
356
ssl_cert_set_cert_cb(CERT * c,int (* cb)(SSL * ssl,void * arg),void * arg)357 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
358 {
359 c->cert_cb = cb;
360 c->cert_cb_arg = arg;
361 }
362
ssl_verify_cert_chain(SSL * s,STACK_OF (X509)* sk)363 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
364 {
365 X509 *x;
366 int i = 0;
367 X509_STORE *verify_store;
368 X509_STORE_CTX *ctx = NULL;
369 X509_VERIFY_PARAM *param;
370
371 if ((sk == NULL) || (sk_X509_num(sk) == 0))
372 return 0;
373
374 if (s->cert->verify_store)
375 verify_store = s->cert->verify_store;
376 else
377 verify_store = s->ctx->cert_store;
378
379 ctx = X509_STORE_CTX_new();
380 if (ctx == NULL) {
381 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
382 return 0;
383 }
384
385 x = sk_X509_value(sk, 0);
386 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
387 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
388 goto end;
389 }
390 param = X509_STORE_CTX_get0_param(ctx);
391 /*
392 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
393 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
394 * and PKI authentication.
395 */
396 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));
397
398 /* Set suite B flags if needed */
399 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
400 if (!X509_STORE_CTX_set_ex_data
401 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
402 goto end;
403 }
404
405 /* Verify via DANE if enabled */
406 if (DANETLS_ENABLED(&s->dane))
407 X509_STORE_CTX_set0_dane(ctx, &s->dane);
408
409 /*
410 * We need to inherit the verify parameters. These can be determined by
411 * the context: if its a server it will verify SSL client certificates or
412 * vice versa.
413 */
414
415 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
416 /*
417 * Anything non-default in "s->param" should overwrite anything in the ctx.
418 */
419 X509_VERIFY_PARAM_set1(param, s->param);
420
421 if (s->verify_callback)
422 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
423
424 if (s->ctx->app_verify_callback != NULL)
425 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
426 else
427 i = X509_verify_cert(ctx);
428
429 s->verify_result = X509_STORE_CTX_get_error(ctx);
430 sk_X509_pop_free(s->verified_chain, X509_free);
431 s->verified_chain = NULL;
432 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
433 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
434 if (s->verified_chain == NULL) {
435 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
436 i = 0;
437 }
438 }
439
440 /* Move peername from the store context params to the SSL handle's */
441 X509_VERIFY_PARAM_move_peername(s->param, param);
442
443 end:
444 X509_STORE_CTX_free(ctx);
445 return i;
446 }
447
set0_CA_list(STACK_OF (X509_NAME)** ca_list,STACK_OF (X509_NAME)* name_list)448 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list,
449 STACK_OF(X509_NAME) *name_list)
450 {
451 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
452 *ca_list = name_list;
453 }
454
STACK_OF(X509_NAME)455 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
456 {
457 int i;
458 const int num = sk_X509_NAME_num(sk);
459 STACK_OF(X509_NAME) *ret;
460 X509_NAME *name;
461
462 ret = sk_X509_NAME_new_reserve(NULL, num);
463 if (ret == NULL) {
464 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
465 return NULL;
466 }
467 for (i = 0; i < num; i++) {
468 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
469 if (name == NULL) {
470 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
471 sk_X509_NAME_pop_free(ret, X509_NAME_free);
472 return NULL;
473 }
474 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */
475 }
476 return ret;
477 }
478
SSL_set0_CA_list(SSL * s,STACK_OF (X509_NAME)* name_list)479 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
480 {
481 set0_CA_list(&s->ca_names, name_list);
482 }
483
SSL_CTX_set0_CA_list(SSL_CTX * ctx,STACK_OF (X509_NAME)* name_list)484 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
485 {
486 set0_CA_list(&ctx->ca_names, name_list);
487 }
488
STACK_OF(X509_NAME)489 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx)
490 {
491 return ctx->ca_names;
492 }
493
STACK_OF(X509_NAME)494 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s)
495 {
496 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names;
497 }
498
SSL_CTX_set_client_CA_list(SSL_CTX * ctx,STACK_OF (X509_NAME)* name_list)499 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
500 {
501 set0_CA_list(&ctx->client_ca_names, name_list);
502 }
503
STACK_OF(X509_NAME)504 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
505 {
506 return ctx->client_ca_names;
507 }
508
SSL_set_client_CA_list(SSL * s,STACK_OF (X509_NAME)* name_list)509 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
510 {
511 set0_CA_list(&s->client_ca_names, name_list);
512 }
513
STACK_OF(X509_NAME)514 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s)
515 {
516 return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL;
517 }
518
STACK_OF(X509_NAME)519 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
520 {
521 if (!s->server)
522 return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL;
523 return s->client_ca_names != NULL ? s->client_ca_names
524 : s->ctx->client_ca_names;
525 }
526
add_ca_name(STACK_OF (X509_NAME)** sk,const X509 * x)527 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x)
528 {
529 X509_NAME *name;
530
531 if (x == NULL)
532 return 0;
533 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL))
534 return 0;
535
536 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
537 return 0;
538
539 if (!sk_X509_NAME_push(*sk, name)) {
540 X509_NAME_free(name);
541 return 0;
542 }
543 return 1;
544 }
545
SSL_add1_to_CA_list(SSL * ssl,const X509 * x)546 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x)
547 {
548 return add_ca_name(&ssl->ca_names, x);
549 }
550
SSL_CTX_add1_to_CA_list(SSL_CTX * ctx,const X509 * x)551 int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x)
552 {
553 return add_ca_name(&ctx->ca_names, x);
554 }
555
556 /*
557 * The following two are older names are to be replaced with
558 * SSL(_CTX)_add1_to_CA_list
559 */
SSL_add_client_CA(SSL * ssl,X509 * x)560 int SSL_add_client_CA(SSL *ssl, X509 *x)
561 {
562 return add_ca_name(&ssl->client_ca_names, x);
563 }
564
SSL_CTX_add_client_CA(SSL_CTX * ctx,X509 * x)565 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
566 {
567 return add_ca_name(&ctx->client_ca_names, x);
568 }
569
xname_cmp(const X509_NAME * a,const X509_NAME * b)570 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
571 {
572 unsigned char *abuf = NULL, *bbuf = NULL;
573 int alen, blen, ret;
574
575 /* X509_NAME_cmp() itself casts away constness in this way, so
576 * assume it's safe:
577 */
578 alen = i2d_X509_NAME((X509_NAME *)a, &abuf);
579 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf);
580
581 if (alen < 0 || blen < 0)
582 ret = -2;
583 else if (alen != blen)
584 ret = alen - blen;
585 else /* alen == blen */
586 ret = memcmp(abuf, bbuf, alen);
587
588 OPENSSL_free(abuf);
589 OPENSSL_free(bbuf);
590
591 return ret;
592 }
593
xname_sk_cmp(const X509_NAME * const * a,const X509_NAME * const * b)594 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
595 {
596 return xname_cmp(*a, *b);
597 }
598
xname_hash(const X509_NAME * a)599 static unsigned long xname_hash(const X509_NAME *a)
600 {
601 return X509_NAME_hash((X509_NAME *)a);
602 }
603
STACK_OF(X509_NAME)604 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
605 {
606 BIO *in = BIO_new(BIO_s_file());
607 X509 *x = NULL;
608 X509_NAME *xn = NULL;
609 STACK_OF(X509_NAME) *ret = NULL;
610 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
611
612 if ((name_hash == NULL) || (in == NULL)) {
613 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
614 goto err;
615 }
616
617 if (!BIO_read_filename(in, file))
618 goto err;
619
620 for (;;) {
621 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
622 break;
623 if (ret == NULL) {
624 ret = sk_X509_NAME_new_null();
625 if (ret == NULL) {
626 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
627 goto err;
628 }
629 }
630 if ((xn = X509_get_subject_name(x)) == NULL)
631 goto err;
632 /* check for duplicates */
633 xn = X509_NAME_dup(xn);
634 if (xn == NULL)
635 goto err;
636 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
637 /* Duplicate. */
638 X509_NAME_free(xn);
639 xn = NULL;
640 } else {
641 lh_X509_NAME_insert(name_hash, xn);
642 if (!sk_X509_NAME_push(ret, xn))
643 goto err;
644 }
645 }
646 goto done;
647
648 err:
649 X509_NAME_free(xn);
650 sk_X509_NAME_pop_free(ret, X509_NAME_free);
651 ret = NULL;
652 done:
653 BIO_free(in);
654 X509_free(x);
655 lh_X509_NAME_free(name_hash);
656 if (ret != NULL)
657 ERR_clear_error();
658 return ret;
659 }
660
SSL_add_file_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * file)661 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
662 const char *file)
663 {
664 BIO *in;
665 X509 *x = NULL;
666 X509_NAME *xn = NULL;
667 int ret = 1;
668 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
669
670 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
671
672 in = BIO_new(BIO_s_file());
673
674 if (in == NULL) {
675 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE);
676 goto err;
677 }
678
679 if (!BIO_read_filename(in, file))
680 goto err;
681
682 for (;;) {
683 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
684 break;
685 if ((xn = X509_get_subject_name(x)) == NULL)
686 goto err;
687 xn = X509_NAME_dup(xn);
688 if (xn == NULL)
689 goto err;
690 if (sk_X509_NAME_find(stack, xn) >= 0) {
691 /* Duplicate. */
692 X509_NAME_free(xn);
693 } else if (!sk_X509_NAME_push(stack, xn)) {
694 X509_NAME_free(xn);
695 goto err;
696 }
697 }
698
699 ERR_clear_error();
700 goto done;
701
702 err:
703 ret = 0;
704 done:
705 BIO_free(in);
706 X509_free(x);
707 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
708 return ret;
709 }
710
SSL_add_dir_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * dir)711 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
712 const char *dir)
713 {
714 OPENSSL_DIR_CTX *d = NULL;
715 const char *filename;
716 int ret = 0;
717
718 /* Note that a side effect is that the CAs will be sorted by name */
719
720 while ((filename = OPENSSL_DIR_read(&d, dir))) {
721 char buf[1024];
722 int r;
723
724 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) {
725 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
726 SSL_R_PATH_TOO_LONG);
727 goto err;
728 }
729 #ifdef OPENSSL_SYS_VMS
730 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename);
731 #else
732 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename);
733 #endif
734 if (r <= 0 || r >= (int)sizeof(buf))
735 goto err;
736 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
737 goto err;
738 }
739
740 if (errno) {
741 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
742 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
743 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
744 goto err;
745 }
746
747 ret = 1;
748
749 err:
750 if (d)
751 OPENSSL_DIR_end(&d);
752
753 return ret;
754 }
755
756 /* Build a certificate chain for current certificate */
ssl_build_cert_chain(SSL * s,SSL_CTX * ctx,int flags)757 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
758 {
759 CERT *c = s ? s->cert : ctx->cert;
760 CERT_PKEY *cpk = c->key;
761 X509_STORE *chain_store = NULL;
762 X509_STORE_CTX *xs_ctx = NULL;
763 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
764 X509 *x;
765 int i, rv = 0;
766
767 if (!cpk->x509) {
768 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
769 goto err;
770 }
771 /* Rearranging and check the chain: add everything to a store */
772 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
773 chain_store = X509_STORE_new();
774 if (chain_store == NULL)
775 goto err;
776 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
777 x = sk_X509_value(cpk->chain, i);
778 if (!X509_STORE_add_cert(chain_store, x))
779 goto err;
780 }
781 /* Add EE cert too: it might be self signed */
782 if (!X509_STORE_add_cert(chain_store, cpk->x509))
783 goto err;
784 } else {
785 if (c->chain_store)
786 chain_store = c->chain_store;
787 else if (s)
788 chain_store = s->ctx->cert_store;
789 else
790 chain_store = ctx->cert_store;
791
792 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
793 untrusted = cpk->chain;
794 }
795
796 xs_ctx = X509_STORE_CTX_new();
797 if (xs_ctx == NULL) {
798 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
799 goto err;
800 }
801 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
802 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
803 goto err;
804 }
805 /* Set suite B flags if needed */
806 X509_STORE_CTX_set_flags(xs_ctx,
807 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
808
809 i = X509_verify_cert(xs_ctx);
810 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
811 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
812 ERR_clear_error();
813 i = 1;
814 rv = 2;
815 }
816 if (i > 0)
817 chain = X509_STORE_CTX_get1_chain(xs_ctx);
818 if (i <= 0) {
819 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
820 i = X509_STORE_CTX_get_error(xs_ctx);
821 ERR_add_error_data(2, "Verify error:",
822 X509_verify_cert_error_string(i));
823
824 goto err;
825 }
826 /* Remove EE certificate from chain */
827 x = sk_X509_shift(chain);
828 X509_free(x);
829 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
830 if (sk_X509_num(chain) > 0) {
831 /* See if last cert is self signed */
832 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
833 if (X509_get_extension_flags(x) & EXFLAG_SS) {
834 x = sk_X509_pop(chain);
835 X509_free(x);
836 }
837 }
838 }
839 /*
840 * Check security level of all CA certificates: EE will have been checked
841 * already.
842 */
843 for (i = 0; i < sk_X509_num(chain); i++) {
844 x = sk_X509_value(chain, i);
845 rv = ssl_security_cert(s, ctx, x, 0, 0);
846 if (rv != 1) {
847 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
848 sk_X509_pop_free(chain, X509_free);
849 rv = 0;
850 goto err;
851 }
852 }
853 sk_X509_pop_free(cpk->chain, X509_free);
854 cpk->chain = chain;
855 if (rv == 0)
856 rv = 1;
857 err:
858 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
859 X509_STORE_free(chain_store);
860 X509_STORE_CTX_free(xs_ctx);
861
862 return rv;
863 }
864
ssl_cert_set_cert_store(CERT * c,X509_STORE * store,int chain,int ref)865 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
866 {
867 X509_STORE **pstore;
868 if (chain)
869 pstore = &c->chain_store;
870 else
871 pstore = &c->verify_store;
872 X509_STORE_free(*pstore);
873 *pstore = store;
874 if (ref && store)
875 X509_STORE_up_ref(store);
876 return 1;
877 }
878
ssl_get_security_level_bits(const SSL * s,const SSL_CTX * ctx,int * levelp)879 int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp)
880 {
881 int level;
882 static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 };
883
884 if (ctx != NULL)
885 level = SSL_CTX_get_security_level(ctx);
886 else
887 level = SSL_get_security_level(s);
888
889 if (level > 5)
890 level = 5;
891 else if (level < 0)
892 level = 0;
893
894 if (levelp != NULL)
895 *levelp = level;
896
897 return minbits_table[level];
898 }
899
ssl_security_default_callback(const SSL * s,const SSL_CTX * ctx,int op,int bits,int nid,void * other,void * ex)900 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
901 int op, int bits, int nid, void *other,
902 void *ex)
903 {
904 int level, minbits, pfs_mask;
905
906 minbits = ssl_get_security_level_bits(s, ctx, &level);
907
908 if (level == 0) {
909 /*
910 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
911 * anything goes.
912 */
913 if (op == SSL_SECOP_TMP_DH && bits < 80)
914 return 0;
915 return 1;
916 }
917 switch (op) {
918 case SSL_SECOP_CIPHER_SUPPORTED:
919 case SSL_SECOP_CIPHER_SHARED:
920 case SSL_SECOP_CIPHER_CHECK:
921 {
922 const SSL_CIPHER *c = other;
923 /* No ciphers below security level */
924 if (bits < minbits)
925 return 0;
926 /* No unauthenticated ciphersuites */
927 if (c->algorithm_auth & SSL_aNULL)
928 return 0;
929 /* No MD5 mac ciphersuites */
930 if (c->algorithm_mac & SSL_MD5)
931 return 0;
932 /* SHA1 HMAC is 160 bits of security */
933 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
934 return 0;
935 /* Level 2: no RC4 */
936 if (level >= 2 && c->algorithm_enc == SSL_RC4)
937 return 0;
938 /* Level 3: forward secure ciphersuites only */
939 pfs_mask = SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK;
940 if (level >= 3 && c->min_tls != TLS1_3_VERSION &&
941 !(c->algorithm_mkey & pfs_mask))
942 return 0;
943 break;
944 }
945 case SSL_SECOP_VERSION:
946 if (!SSL_IS_DTLS(s)) {
947 /* SSLv3 not allowed at level 2 */
948 if (nid <= SSL3_VERSION && level >= 2)
949 return 0;
950 /* TLS v1.1 and above only for level 3 */
951 if (nid <= TLS1_VERSION && level >= 3)
952 return 0;
953 /* TLS v1.2 only for level 4 and above */
954 if (nid <= TLS1_1_VERSION && level >= 4)
955 return 0;
956 } else {
957 /* DTLS v1.2 only for level 4 and above */
958 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
959 return 0;
960 }
961 break;
962
963 case SSL_SECOP_COMPRESSION:
964 if (level >= 2)
965 return 0;
966 break;
967 case SSL_SECOP_TICKET:
968 if (level >= 3)
969 return 0;
970 break;
971 default:
972 if (bits < minbits)
973 return 0;
974 }
975 return 1;
976 }
977
ssl_security(const SSL * s,int op,int bits,int nid,void * other)978 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
979 {
980 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
981 }
982
ssl_ctx_security(const SSL_CTX * ctx,int op,int bits,int nid,void * other)983 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
984 {
985 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,
986 ctx->cert->sec_ex);
987 }
988
ssl_cert_lookup_by_nid(int nid,size_t * pidx)989 int ssl_cert_lookup_by_nid(int nid, size_t *pidx)
990 {
991 size_t i;
992
993 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
994 if (ssl_cert_info[i].nid == nid) {
995 *pidx = i;
996 return 1;
997 }
998 }
999
1000 return 0;
1001 }
1002
ssl_cert_lookup_by_pkey(const EVP_PKEY * pk,size_t * pidx)1003 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx)
1004 {
1005 int nid = EVP_PKEY_id(pk);
1006 size_t tmpidx;
1007
1008 if (nid == NID_undef)
1009 return NULL;
1010
1011 if (!ssl_cert_lookup_by_nid(nid, &tmpidx))
1012 return NULL;
1013
1014 if (pidx != NULL)
1015 *pidx = tmpidx;
1016
1017 return &ssl_cert_info[tmpidx];
1018 }
1019
ssl_cert_lookup_by_idx(size_t idx)1020 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx)
1021 {
1022 if (idx >= OSSL_NELEM(ssl_cert_info))
1023 return NULL;
1024 return &ssl_cert_info[idx];
1025 }
1026