1 /*
2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 *
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11 #include <stdio.h>
12 #include <sys/types.h>
13
14 #include "internal/nelem.h"
15 #include "internal/o_dir.h"
16 #include <openssl/bio.h>
17 #include <openssl/pem.h>
18 #include <openssl/store.h>
19 #include <openssl/x509v3.h>
20 #include <openssl/dh.h>
21 #include <openssl/bn.h>
22 #include <openssl/crypto.h>
23 #include "internal/refcount.h"
24 #include "ssl_local.h"
25 #include "ssl_cert_table.h"
26 #include "internal/thread_once.h"
27
28 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
29 int op, int bits, int nid, void *other,
30 void *ex);
31
32 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
33 static volatile int ssl_x509_store_ctx_idx = -1;
34
DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)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
SSL_get_ex_data_X509_STORE_CTX_idx(void)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
ssl_cert_new(void)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
ssl_cert_dup(CERT * cert)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
ssl_cert_clear_certs(CERT * c)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 OSSL_STACK_OF_X509_free(cpk->chain);
216 cpk->chain = NULL;
217 OPENSSL_free(cpk->serverinfo);
218 cpk->serverinfo = NULL;
219 cpk->serverinfo_length = 0;
220 }
221 }
222
ssl_cert_free(CERT * c)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
ssl_cert_set0_chain(SSL_CONNECTION * s,SSL_CTX * ctx,STACK_OF (X509)* chain)251 int ssl_cert_set0_chain(SSL_CONNECTION *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 OSSL_STACK_OF_X509_free(cpk->chain);
268 cpk->chain = chain;
269 return 1;
270 }
271
ssl_cert_set1_chain(SSL_CONNECTION * s,SSL_CTX * ctx,STACK_OF (X509)* chain)272 int ssl_cert_set1_chain(SSL_CONNECTION *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 OSSL_STACK_OF_X509_free(dchain);
282 return 0;
283 }
284 return 1;
285 }
286
ssl_cert_add0_chain_cert(SSL_CONNECTION * s,SSL_CTX * ctx,X509 * x)287 int ssl_cert_add0_chain_cert(SSL_CONNECTION *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
ssl_cert_add1_chain_cert(SSL_CONNECTION * s,SSL_CTX * ctx,X509 * x)305 int ssl_cert_add1_chain_cert(SSL_CONNECTION *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
ssl_cert_select_current(CERT * c,X509 * x)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
ssl_cert_set_current(CERT * c,long op)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
ssl_cert_set_cert_cb(CERT * c,int (* cb)(SSL * ssl,void * arg),void * arg)359 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
360 {
361 c->cert_cb = cb;
362 c->cert_cb_arg = arg;
363 }
364
365 /*
366 * Verify a certificate chain
367 * Return codes:
368 * 1: Verify success
369 * 0: Verify failure or error
370 * -1: Retry required
371 */
ssl_verify_cert_chain(SSL_CONNECTION * s,STACK_OF (X509)* sk)372 int ssl_verify_cert_chain(SSL_CONNECTION *s, STACK_OF(X509) *sk)
373 {
374 X509 *x;
375 int i = 0;
376 X509_STORE *verify_store;
377 X509_STORE_CTX *ctx = NULL;
378 X509_VERIFY_PARAM *param;
379 SSL_CTX *sctx;
380
381 if ((sk == NULL) || (sk_X509_num(sk) == 0))
382 return 0;
383
384 sctx = SSL_CONNECTION_GET_CTX(s);
385 if (s->cert->verify_store)
386 verify_store = s->cert->verify_store;
387 else
388 verify_store = sctx->cert_store;
389
390 ctx = X509_STORE_CTX_new_ex(sctx->libctx, sctx->propq);
391 if (ctx == NULL) {
392 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
393 return 0;
394 }
395
396 x = sk_X509_value(sk, 0);
397 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
398 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
399 goto end;
400 }
401 param = X509_STORE_CTX_get0_param(ctx);
402 /*
403 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
404 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
405 * and PKI authentication.
406 */
407 X509_VERIFY_PARAM_set_auth_level(param,
408 SSL_get_security_level(SSL_CONNECTION_GET_SSL(s)));
409
410 /* Set suite B flags if needed */
411 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
412 if (!X509_STORE_CTX_set_ex_data(ctx,
413 SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
414 goto end;
415 }
416
417 /* Verify via DANE if enabled */
418 if (DANETLS_ENABLED(&s->dane))
419 X509_STORE_CTX_set0_dane(ctx, &s->dane);
420
421 /*
422 * We need to inherit the verify parameters. These can be determined by
423 * the context: if its a server it will verify SSL client certificates or
424 * vice versa.
425 */
426
427 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
428 /*
429 * Anything non-default in "s->param" should overwrite anything in the ctx.
430 */
431 X509_VERIFY_PARAM_set1(param, s->param);
432
433 if (s->verify_callback)
434 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
435
436 if (sctx->app_verify_callback != NULL) {
437 i = sctx->app_verify_callback(ctx, sctx->app_verify_arg);
438 } else {
439 i = X509_verify_cert(ctx);
440 /* We treat an error in the same way as a failure to verify */
441 if (i < 0)
442 i = 0;
443 }
444
445 s->verify_result = X509_STORE_CTX_get_error(ctx);
446 OSSL_STACK_OF_X509_free(s->verified_chain);
447 s->verified_chain = NULL;
448 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
449 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
450 if (s->verified_chain == NULL) {
451 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
452 i = 0;
453 }
454 }
455
456 /* Move peername from the store context params to the SSL handle's */
457 X509_VERIFY_PARAM_move_peername(s->param, param);
458
459 end:
460 X509_STORE_CTX_free(ctx);
461 return i;
462 }
463
set0_CA_list(STACK_OF (X509_NAME)** ca_list,STACK_OF (X509_NAME)* name_list)464 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list,
465 STACK_OF(X509_NAME) *name_list)
466 {
467 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
468 *ca_list = name_list;
469 }
470
STACK_OF(X509_NAME)471 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
472 {
473 int i;
474 const int num = sk_X509_NAME_num(sk);
475 STACK_OF(X509_NAME) *ret;
476 X509_NAME *name;
477
478 ret = sk_X509_NAME_new_reserve(NULL, num);
479 if (ret == NULL) {
480 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
481 return NULL;
482 }
483 for (i = 0; i < num; i++) {
484 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
485 if (name == NULL) {
486 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
487 sk_X509_NAME_pop_free(ret, X509_NAME_free);
488 return NULL;
489 }
490 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */
491 }
492 return ret;
493 }
494
SSL_set0_CA_list(SSL * s,STACK_OF (X509_NAME)* name_list)495 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
496 {
497 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
498
499 if (sc == NULL)
500 return;
501
502 set0_CA_list(&sc->ca_names, name_list);
503 }
504
SSL_CTX_set0_CA_list(SSL_CTX * ctx,STACK_OF (X509_NAME)* name_list)505 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
506 {
507 set0_CA_list(&ctx->ca_names, name_list);
508 }
509
STACK_OF(X509_NAME)510 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx)
511 {
512 return ctx->ca_names;
513 }
514
STACK_OF(X509_NAME)515 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s)
516 {
517 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
518
519 if (sc == NULL)
520 return NULL;
521
522 return sc->ca_names != NULL ? sc->ca_names : s->ctx->ca_names;
523 }
524
SSL_CTX_set_client_CA_list(SSL_CTX * ctx,STACK_OF (X509_NAME)* name_list)525 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
526 {
527 set0_CA_list(&ctx->client_ca_names, name_list);
528 }
529
STACK_OF(X509_NAME)530 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
531 {
532 return ctx->client_ca_names;
533 }
534
SSL_set_client_CA_list(SSL * s,STACK_OF (X509_NAME)* name_list)535 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
536 {
537 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
538
539 if (sc == NULL)
540 return;
541
542 set0_CA_list(&sc->client_ca_names, name_list);
543 }
544
STACK_OF(X509_NAME)545 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s)
546 {
547 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
548
549 if (sc == NULL)
550 return NULL;
551
552 return sc->s3.tmp.peer_ca_names;
553 }
554
STACK_OF(X509_NAME)555 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
556 {
557 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
558
559 if (sc == NULL)
560 return NULL;
561
562 if (!sc->server)
563 return sc->s3.tmp.peer_ca_names;
564 return sc->client_ca_names != NULL ? sc->client_ca_names
565 : s->ctx->client_ca_names;
566 }
567
add_ca_name(STACK_OF (X509_NAME)** sk,const X509 * x)568 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x)
569 {
570 X509_NAME *name;
571
572 if (x == NULL)
573 return 0;
574 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL))
575 return 0;
576
577 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
578 return 0;
579
580 if (!sk_X509_NAME_push(*sk, name)) {
581 X509_NAME_free(name);
582 return 0;
583 }
584 return 1;
585 }
586
SSL_add1_to_CA_list(SSL * ssl,const X509 * x)587 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x)
588 {
589 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
590
591 if (sc == NULL)
592 return 0;
593
594 return add_ca_name(&sc->ca_names, x);
595 }
596
SSL_CTX_add1_to_CA_list(SSL_CTX * ctx,const X509 * x)597 int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x)
598 {
599 return add_ca_name(&ctx->ca_names, x);
600 }
601
602 /*
603 * The following two are older names are to be replaced with
604 * SSL(_CTX)_add1_to_CA_list
605 */
SSL_add_client_CA(SSL * ssl,X509 * x)606 int SSL_add_client_CA(SSL *ssl, X509 *x)
607 {
608 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
609
610 if (sc == NULL)
611 return 0;
612
613 return add_ca_name(&sc->client_ca_names, x);
614 }
615
SSL_CTX_add_client_CA(SSL_CTX * ctx,X509 * x)616 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
617 {
618 return add_ca_name(&ctx->client_ca_names, x);
619 }
620
xname_cmp(const X509_NAME * a,const X509_NAME * b)621 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
622 {
623 unsigned char *abuf = NULL, *bbuf = NULL;
624 int alen, blen, ret;
625
626 /* X509_NAME_cmp() itself casts away constness in this way, so
627 * assume it's safe:
628 */
629 alen = i2d_X509_NAME((X509_NAME *)a, &abuf);
630 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf);
631
632 if (alen < 0 || blen < 0)
633 ret = -2;
634 else if (alen != blen)
635 ret = alen - blen;
636 else /* alen == blen */
637 ret = memcmp(abuf, bbuf, alen);
638
639 OPENSSL_free(abuf);
640 OPENSSL_free(bbuf);
641
642 return ret;
643 }
644
xname_sk_cmp(const X509_NAME * const * a,const X509_NAME * const * b)645 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
646 {
647 return xname_cmp(*a, *b);
648 }
649
xname_hash(const X509_NAME * a)650 static unsigned long xname_hash(const X509_NAME *a)
651 {
652 /* This returns 0 also if SHA1 is not available */
653 return X509_NAME_hash_ex((X509_NAME *)a, NULL, NULL, NULL);
654 }
655
STACK_OF(X509_NAME)656 STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file,
657 OSSL_LIB_CTX *libctx,
658 const char *propq)
659 {
660 BIO *in = BIO_new(BIO_s_file());
661 X509 *x = NULL;
662 X509_NAME *xn = NULL;
663 STACK_OF(X509_NAME) *ret = NULL;
664 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
665 OSSL_LIB_CTX *prev_libctx = NULL;
666
667 if ((name_hash == NULL) || (in == NULL)) {
668 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
669 goto err;
670 }
671
672 x = X509_new_ex(libctx, propq);
673 if (x == NULL) {
674 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
675 goto err;
676 }
677 if (BIO_read_filename(in, file) <= 0)
678 goto err;
679
680 /* Internally lh_X509_NAME_retrieve() needs the libctx to retrieve SHA1 */
681 prev_libctx = OSSL_LIB_CTX_set0_default(libctx);
682 for (;;) {
683 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
684 break;
685 if (ret == NULL) {
686 ret = sk_X509_NAME_new_null();
687 if (ret == NULL) {
688 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
689 goto err;
690 }
691 }
692 if ((xn = X509_get_subject_name(x)) == NULL)
693 goto err;
694 /* check for duplicates */
695 xn = X509_NAME_dup(xn);
696 if (xn == NULL)
697 goto err;
698 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
699 /* Duplicate. */
700 X509_NAME_free(xn);
701 xn = NULL;
702 } else {
703 lh_X509_NAME_insert(name_hash, xn);
704 if (!sk_X509_NAME_push(ret, xn))
705 goto err;
706 }
707 }
708 goto done;
709
710 err:
711 X509_NAME_free(xn);
712 sk_X509_NAME_pop_free(ret, X509_NAME_free);
713 ret = NULL;
714 done:
715 /* restore the old libctx */
716 OSSL_LIB_CTX_set0_default(prev_libctx);
717 BIO_free(in);
718 X509_free(x);
719 lh_X509_NAME_free(name_hash);
720 if (ret != NULL)
721 ERR_clear_error();
722 return ret;
723 }
724
STACK_OF(X509_NAME)725 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
726 {
727 return SSL_load_client_CA_file_ex(file, NULL, NULL);
728 }
729
SSL_add_file_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * file)730 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
731 const char *file)
732 {
733 BIO *in;
734 X509 *x = NULL;
735 X509_NAME *xn = NULL;
736 int ret = 1;
737 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
738
739 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
740
741 in = BIO_new(BIO_s_file());
742
743 if (in == NULL) {
744 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
745 goto err;
746 }
747
748 if (BIO_read_filename(in, file) <= 0)
749 goto err;
750
751 for (;;) {
752 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
753 break;
754 if ((xn = X509_get_subject_name(x)) == NULL)
755 goto err;
756 xn = X509_NAME_dup(xn);
757 if (xn == NULL)
758 goto err;
759 if (sk_X509_NAME_find(stack, xn) >= 0) {
760 /* Duplicate. */
761 X509_NAME_free(xn);
762 } else if (!sk_X509_NAME_push(stack, xn)) {
763 X509_NAME_free(xn);
764 goto err;
765 }
766 }
767
768 ERR_clear_error();
769 goto done;
770
771 err:
772 ret = 0;
773 done:
774 BIO_free(in);
775 X509_free(x);
776 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
777 return ret;
778 }
779
SSL_add_dir_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * dir)780 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
781 const char *dir)
782 {
783 OPENSSL_DIR_CTX *d = NULL;
784 const char *filename;
785 int ret = 0;
786
787 /* Note that a side effect is that the CAs will be sorted by name */
788
789 while ((filename = OPENSSL_DIR_read(&d, dir))) {
790 char buf[1024];
791 int r;
792
793 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) {
794 ERR_raise(ERR_LIB_SSL, SSL_R_PATH_TOO_LONG);
795 goto err;
796 }
797 #ifdef OPENSSL_SYS_VMS
798 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename);
799 #else
800 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename);
801 #endif
802 if (r <= 0 || r >= (int)sizeof(buf))
803 goto err;
804 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
805 goto err;
806 }
807
808 if (errno) {
809 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
810 "calling OPENSSL_dir_read(%s)", dir);
811 ERR_raise(ERR_LIB_SSL, ERR_R_SYS_LIB);
812 goto err;
813 }
814
815 ret = 1;
816
817 err:
818 if (d)
819 OPENSSL_DIR_end(&d);
820
821 return ret;
822 }
823
add_uris_recursive(STACK_OF (X509_NAME)* stack,const char * uri,int depth)824 static int add_uris_recursive(STACK_OF(X509_NAME) *stack,
825 const char *uri, int depth)
826 {
827 int ok = 1;
828 OSSL_STORE_CTX *ctx = NULL;
829 X509 *x = NULL;
830 X509_NAME *xn = NULL;
831
832 if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL)
833 goto err;
834
835 while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) {
836 OSSL_STORE_INFO *info = OSSL_STORE_load(ctx);
837 int infotype = info == 0 ? 0 : OSSL_STORE_INFO_get_type(info);
838
839 if (info == NULL)
840 continue;
841
842 if (infotype == OSSL_STORE_INFO_NAME) {
843 /*
844 * This is an entry in the "directory" represented by the current
845 * uri. if |depth| allows, dive into it.
846 */
847 if (depth > 0)
848 ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info),
849 depth - 1);
850 } else if (infotype == OSSL_STORE_INFO_CERT) {
851 if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL
852 || (xn = X509_get_subject_name(x)) == NULL
853 || (xn = X509_NAME_dup(xn)) == NULL)
854 goto err;
855 if (sk_X509_NAME_find(stack, xn) >= 0) {
856 /* Duplicate. */
857 X509_NAME_free(xn);
858 } else if (!sk_X509_NAME_push(stack, xn)) {
859 X509_NAME_free(xn);
860 goto err;
861 }
862 }
863
864 OSSL_STORE_INFO_free(info);
865 }
866
867 ERR_clear_error();
868 goto done;
869
870 err:
871 ok = 0;
872 done:
873 OSSL_STORE_close(ctx);
874
875 return ok;
876 }
877
SSL_add_store_cert_subjects_to_stack(STACK_OF (X509_NAME)* stack,const char * store)878 int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
879 const char *store)
880 {
881 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b)
882 = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
883 int ret = add_uris_recursive(stack, store, 1);
884
885 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
886 return ret;
887 }
888
889 /* Build a certificate chain for current certificate */
ssl_build_cert_chain(SSL_CONNECTION * s,SSL_CTX * ctx,int flags)890 int ssl_build_cert_chain(SSL_CONNECTION *s, SSL_CTX *ctx, int flags)
891 {
892 CERT *c = s != NULL ? s->cert : ctx->cert;
893 CERT_PKEY *cpk = c->key;
894 X509_STORE *chain_store = NULL;
895 X509_STORE_CTX *xs_ctx = NULL;
896 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
897 X509 *x;
898 SSL_CTX *real_ctx = (s == NULL) ? ctx : SSL_CONNECTION_GET_CTX(s);
899 int i, rv = 0;
900
901 if (cpk->x509 == NULL) {
902 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_SET);
903 goto err;
904 }
905 /* Rearranging and check the chain: add everything to a store */
906 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
907 chain_store = X509_STORE_new();
908 if (chain_store == NULL)
909 goto err;
910 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
911 x = sk_X509_value(cpk->chain, i);
912 if (!X509_STORE_add_cert(chain_store, x))
913 goto err;
914 }
915 /* Add EE cert too: it might be self signed */
916 if (!X509_STORE_add_cert(chain_store, cpk->x509))
917 goto err;
918 } else {
919 if (c->chain_store != NULL)
920 chain_store = c->chain_store;
921 else
922 chain_store = real_ctx->cert_store;
923
924 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
925 untrusted = cpk->chain;
926 }
927
928 xs_ctx = X509_STORE_CTX_new_ex(real_ctx->libctx, real_ctx->propq);
929 if (xs_ctx == NULL) {
930 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
931 goto err;
932 }
933 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
934 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
935 goto err;
936 }
937 /* Set suite B flags if needed */
938 X509_STORE_CTX_set_flags(xs_ctx,
939 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
940
941 i = X509_verify_cert(xs_ctx);
942 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
943 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
944 ERR_clear_error();
945 i = 1;
946 rv = 2;
947 }
948 if (i > 0)
949 chain = X509_STORE_CTX_get1_chain(xs_ctx);
950 if (i <= 0) {
951 i = X509_STORE_CTX_get_error(xs_ctx);
952 ERR_raise_data(ERR_LIB_SSL, SSL_R_CERTIFICATE_VERIFY_FAILED,
953 "Verify error:%s", X509_verify_cert_error_string(i));
954
955 goto err;
956 }
957 /* Remove EE certificate from chain */
958 x = sk_X509_shift(chain);
959 X509_free(x);
960 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
961 if (sk_X509_num(chain) > 0) {
962 /* See if last cert is self signed */
963 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
964 if (X509_get_extension_flags(x) & EXFLAG_SS) {
965 x = sk_X509_pop(chain);
966 X509_free(x);
967 }
968 }
969 }
970 /*
971 * Check security level of all CA certificates: EE will have been checked
972 * already.
973 */
974 for (i = 0; i < sk_X509_num(chain); i++) {
975 x = sk_X509_value(chain, i);
976 rv = ssl_security_cert(s, ctx, x, 0, 0);
977 if (rv != 1) {
978 ERR_raise(ERR_LIB_SSL, rv);
979 OSSL_STACK_OF_X509_free(chain);
980 rv = 0;
981 goto err;
982 }
983 }
984 OSSL_STACK_OF_X509_free(cpk->chain);
985 cpk->chain = chain;
986 if (rv == 0)
987 rv = 1;
988 err:
989 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
990 X509_STORE_free(chain_store);
991 X509_STORE_CTX_free(xs_ctx);
992
993 return rv;
994 }
995
ssl_cert_set_cert_store(CERT * c,X509_STORE * store,int chain,int ref)996 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
997 {
998 X509_STORE **pstore;
999 if (chain)
1000 pstore = &c->chain_store;
1001 else
1002 pstore = &c->verify_store;
1003 X509_STORE_free(*pstore);
1004 *pstore = store;
1005 if (ref && store)
1006 X509_STORE_up_ref(store);
1007 return 1;
1008 }
1009
ssl_cert_get_cert_store(CERT * c,X509_STORE ** pstore,int chain)1010 int ssl_cert_get_cert_store(CERT *c, X509_STORE **pstore, int chain)
1011 {
1012 *pstore = (chain ? c->chain_store : c->verify_store);
1013 return 1;
1014 }
1015
ssl_get_security_level_bits(const SSL * s,const SSL_CTX * ctx,int * levelp)1016 int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp)
1017 {
1018 int level;
1019 /*
1020 * note that there's a corresponding minbits_table
1021 * in crypto/x509/x509_vfy.c that's used for checking the security level
1022 * of RSA and DSA keys
1023 */
1024 static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 };
1025
1026 if (ctx != NULL)
1027 level = SSL_CTX_get_security_level(ctx);
1028 else
1029 level = SSL_get_security_level(s);
1030
1031 if (level > 5)
1032 level = 5;
1033 else if (level < 0)
1034 level = 0;
1035
1036 if (levelp != NULL)
1037 *levelp = level;
1038
1039 return minbits_table[level];
1040 }
1041
ssl_security_default_callback(const SSL * s,const SSL_CTX * ctx,int op,int bits,int nid,void * other,void * ex)1042 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
1043 int op, int bits, int nid, void *other,
1044 void *ex)
1045 {
1046 int level, minbits, pfs_mask;
1047 const SSL_CONNECTION *sc;
1048
1049 minbits = ssl_get_security_level_bits(s, ctx, &level);
1050
1051 if (level == 0) {
1052 /*
1053 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1054 * anything goes.
1055 */
1056 if (op == SSL_SECOP_TMP_DH && bits < 80)
1057 return 0;
1058 return 1;
1059 }
1060 switch (op) {
1061 case SSL_SECOP_CIPHER_SUPPORTED:
1062 case SSL_SECOP_CIPHER_SHARED:
1063 case SSL_SECOP_CIPHER_CHECK:
1064 {
1065 const SSL_CIPHER *c = other;
1066 /* No ciphers below security level */
1067 if (bits < minbits)
1068 return 0;
1069 /* No unauthenticated ciphersuites */
1070 if (c->algorithm_auth & SSL_aNULL)
1071 return 0;
1072 /* No MD5 mac ciphersuites */
1073 if (c->algorithm_mac & SSL_MD5)
1074 return 0;
1075 /* SHA1 HMAC is 160 bits of security */
1076 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1077 return 0;
1078 /* Level 3: forward secure ciphersuites only */
1079 pfs_mask = SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK;
1080 if (level >= 3 && c->min_tls != TLS1_3_VERSION &&
1081 !(c->algorithm_mkey & pfs_mask))
1082 return 0;
1083 break;
1084 }
1085 case SSL_SECOP_VERSION:
1086 if ((sc = SSL_CONNECTION_FROM_CONST_SSL(s)) == NULL)
1087 return 0;
1088 if (!SSL_CONNECTION_IS_DTLS(sc)) {
1089 /* SSLv3, TLS v1.0 and TLS v1.1 only allowed at level 0 */
1090 if (nid <= TLS1_1_VERSION && level > 0)
1091 return 0;
1092 } else {
1093 /* DTLS v1.0 only allowed at level 0 */
1094 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level > 0)
1095 return 0;
1096 }
1097 break;
1098
1099 case SSL_SECOP_COMPRESSION:
1100 if (level >= 2)
1101 return 0;
1102 break;
1103 case SSL_SECOP_TICKET:
1104 if (level >= 3)
1105 return 0;
1106 break;
1107 default:
1108 if (bits < minbits)
1109 return 0;
1110 }
1111 return 1;
1112 }
1113
ssl_security(const SSL_CONNECTION * s,int op,int bits,int nid,void * other)1114 int ssl_security(const SSL_CONNECTION *s, int op, int bits, int nid, void *other)
1115 {
1116 return s->cert->sec_cb(SSL_CONNECTION_GET_SSL(s), NULL, op, bits, nid,
1117 other, s->cert->sec_ex);
1118 }
1119
ssl_ctx_security(const SSL_CTX * ctx,int op,int bits,int nid,void * other)1120 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1121 {
1122 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,
1123 ctx->cert->sec_ex);
1124 }
1125
ssl_cert_lookup_by_nid(int nid,size_t * pidx)1126 int ssl_cert_lookup_by_nid(int nid, size_t *pidx)
1127 {
1128 size_t i;
1129
1130 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1131 if (ssl_cert_info[i].nid == nid) {
1132 *pidx = i;
1133 return 1;
1134 }
1135 }
1136
1137 return 0;
1138 }
1139
ssl_cert_lookup_by_pkey(const EVP_PKEY * pk,size_t * pidx)1140 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx)
1141 {
1142 size_t i;
1143
1144 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1145 const SSL_CERT_LOOKUP *tmp_lu = &ssl_cert_info[i];
1146
1147 if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid))
1148 || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) {
1149 if (pidx != NULL)
1150 *pidx = i;
1151 return tmp_lu;
1152 }
1153 }
1154
1155 return NULL;
1156 }
1157
ssl_cert_lookup_by_idx(size_t idx)1158 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx)
1159 {
1160 if (idx >= OSSL_NELEM(ssl_cert_info))
1161 return NULL;
1162 return &ssl_cert_info[idx];
1163 }
1164
