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1 | /* | |
2 | * Copyright 1995-2017 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 | #ifndef NO_SYS_TYPES_H | |
16 | # include <sys/types.h> | |
17 | #endif | |
18 | ||
19 | #include "internal/o_dir.h" | |
20 | #include <openssl/lhash.h> | |
21 | #include <openssl/bio.h> | |
22 | #include <openssl/pem.h> | |
23 | #include <openssl/x509v3.h> | |
24 | #include <openssl/dh.h> | |
25 | #include <openssl/bn.h> | |
26 | #include <openssl/crypto.h> | |
27 | #include "internal/refcount.h" | |
28 | #include "ssl_locl.h" | |
29 | #include "ssl_cert_table.h" | |
30 | #include "internal/thread_once.h" | |
31 | ||
32 | static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, | |
33 | int op, int bits, int nid, void *other, | |
34 | void *ex); | |
35 | ||
36 | static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT; | |
37 | static volatile int ssl_x509_store_ctx_idx = -1; | |
38 | ||
39 | DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init) | |
40 | { | |
41 | ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0, | |
42 | "SSL for verify callback", | |
43 | NULL, NULL, NULL); | |
44 | return ssl_x509_store_ctx_idx >= 0; | |
45 | } | |
46 | ||
47 | int SSL_get_ex_data_X509_STORE_CTX_idx(void) | |
48 | { | |
49 | ||
50 | if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init)) | |
51 | return -1; | |
52 | return ssl_x509_store_ctx_idx; | |
53 | } | |
54 | ||
55 | CERT *ssl_cert_new(void) | |
56 | { | |
57 | CERT *ret = OPENSSL_zalloc(sizeof(*ret)); | |
58 | ||
59 | if (ret == NULL) { | |
60 | SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE); | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | ret->key = &(ret->pkeys[SSL_PKEY_RSA]); | |
65 | ret->references = 1; | |
66 | ret->sec_cb = ssl_security_default_callback; | |
67 | ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL; | |
68 | ret->sec_ex = NULL; | |
69 | ret->lock = CRYPTO_THREAD_lock_new(); | |
70 | if (ret->lock == NULL) { | |
71 | SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE); | |
72 | OPENSSL_free(ret); | |
73 | return NULL; | |
74 | } | |
75 | ||
76 | return ret; | |
77 | } | |
78 | ||
79 | CERT *ssl_cert_dup(CERT *cert) | |
80 | { | |
81 | CERT *ret = OPENSSL_zalloc(sizeof(*ret)); | |
82 | int i; | |
83 | ||
84 | if (ret == NULL) { | |
85 | SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); | |
86 | return NULL; | |
87 | } | |
88 | ||
89 | ret->references = 1; | |
90 | ret->key = &ret->pkeys[cert->key - cert->pkeys]; | |
91 | ret->lock = CRYPTO_THREAD_lock_new(); | |
92 | if (ret->lock == NULL) { | |
93 | SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); | |
94 | OPENSSL_free(ret); | |
95 | return NULL; | |
96 | } | |
97 | #ifndef OPENSSL_NO_DH | |
98 | if (cert->dh_tmp != NULL) { | |
99 | ret->dh_tmp = cert->dh_tmp; | |
100 | EVP_PKEY_up_ref(ret->dh_tmp); | |
101 | } | |
102 | ret->dh_tmp_cb = cert->dh_tmp_cb; | |
103 | ret->dh_tmp_auto = cert->dh_tmp_auto; | |
104 | #endif | |
105 | ||
106 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
107 | CERT_PKEY *cpk = cert->pkeys + i; | |
108 | CERT_PKEY *rpk = ret->pkeys + i; | |
109 | if (cpk->x509 != NULL) { | |
110 | rpk->x509 = cpk->x509; | |
111 | X509_up_ref(rpk->x509); | |
112 | } | |
113 | ||
114 | if (cpk->privatekey != NULL) { | |
115 | rpk->privatekey = cpk->privatekey; | |
116 | EVP_PKEY_up_ref(cpk->privatekey); | |
117 | } | |
118 | ||
119 | if (cpk->chain) { | |
120 | rpk->chain = X509_chain_up_ref(cpk->chain); | |
121 | if (!rpk->chain) { | |
122 | SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); | |
123 | goto err; | |
124 | } | |
125 | } | |
126 | if (cert->pkeys[i].serverinfo != NULL) { | |
127 | /* Just copy everything. */ | |
128 | ret->pkeys[i].serverinfo = | |
129 | OPENSSL_malloc(cert->pkeys[i].serverinfo_length); | |
130 | if (ret->pkeys[i].serverinfo == NULL) { | |
131 | SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); | |
132 | goto err; | |
133 | } | |
134 | ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length; | |
135 | memcpy(ret->pkeys[i].serverinfo, | |
136 | cert->pkeys[i].serverinfo, cert->pkeys[i].serverinfo_length); | |
137 | } | |
138 | } | |
139 | ||
140 | /* Configured sigalgs copied across */ | |
141 | if (cert->conf_sigalgs) { | |
142 | ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen | |
143 | * sizeof(*cert->conf_sigalgs)); | |
144 | if (ret->conf_sigalgs == NULL) | |
145 | goto err; | |
146 | memcpy(ret->conf_sigalgs, cert->conf_sigalgs, | |
147 | cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs)); | |
148 | ret->conf_sigalgslen = cert->conf_sigalgslen; | |
149 | } else | |
150 | ret->conf_sigalgs = NULL; | |
151 | ||
152 | if (cert->client_sigalgs) { | |
153 | ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen | |
154 | * sizeof(*cert->client_sigalgs)); | |
155 | if (ret->client_sigalgs == NULL) | |
156 | goto err; | |
157 | memcpy(ret->client_sigalgs, cert->client_sigalgs, | |
158 | cert->client_sigalgslen * sizeof(*cert->client_sigalgs)); | |
159 | ret->client_sigalgslen = cert->client_sigalgslen; | |
160 | } else | |
161 | ret->client_sigalgs = NULL; | |
162 | /* Shared sigalgs also NULL */ | |
163 | ret->shared_sigalgs = NULL; | |
164 | /* Copy any custom client certificate types */ | |
165 | if (cert->ctype) { | |
166 | ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len); | |
167 | if (ret->ctype == NULL) | |
168 | goto err; | |
169 | ret->ctype_len = cert->ctype_len; | |
170 | } | |
171 | ||
172 | ret->cert_flags = cert->cert_flags; | |
173 | ||
174 | ret->cert_cb = cert->cert_cb; | |
175 | ret->cert_cb_arg = cert->cert_cb_arg; | |
176 | ||
177 | if (cert->verify_store) { | |
178 | X509_STORE_up_ref(cert->verify_store); | |
179 | ret->verify_store = cert->verify_store; | |
180 | } | |
181 | ||
182 | if (cert->chain_store) { | |
183 | X509_STORE_up_ref(cert->chain_store); | |
184 | ret->chain_store = cert->chain_store; | |
185 | } | |
186 | ||
187 | ret->sec_cb = cert->sec_cb; | |
188 | ret->sec_level = cert->sec_level; | |
189 | ret->sec_ex = cert->sec_ex; | |
190 | ||
191 | if (!custom_exts_copy(&ret->custext, &cert->custext)) | |
192 | goto err; | |
193 | #ifndef OPENSSL_NO_PSK | |
194 | if (cert->psk_identity_hint) { | |
195 | ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint); | |
196 | if (ret->psk_identity_hint == NULL) | |
197 | goto err; | |
198 | } | |
199 | #endif | |
200 | return ret; | |
201 | ||
202 | err: | |
203 | ssl_cert_free(ret); | |
204 | ||
205 | return NULL; | |
206 | } | |
207 | ||
208 | /* Free up and clear all certificates and chains */ | |
209 | ||
210 | void ssl_cert_clear_certs(CERT *c) | |
211 | { | |
212 | int i; | |
213 | if (c == NULL) | |
214 | return; | |
215 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
216 | CERT_PKEY *cpk = c->pkeys + i; | |
217 | X509_free(cpk->x509); | |
218 | cpk->x509 = NULL; | |
219 | EVP_PKEY_free(cpk->privatekey); | |
220 | cpk->privatekey = NULL; | |
221 | sk_X509_pop_free(cpk->chain, X509_free); | |
222 | cpk->chain = NULL; | |
223 | OPENSSL_free(cpk->serverinfo); | |
224 | cpk->serverinfo = NULL; | |
225 | cpk->serverinfo_length = 0; | |
226 | } | |
227 | } | |
228 | ||
229 | void ssl_cert_free(CERT *c) | |
230 | { | |
231 | int i; | |
232 | ||
233 | if (c == NULL) | |
234 | return; | |
235 | ||
236 | CRYPTO_DOWN_REF(&c->references, &i, c->lock); | |
237 | REF_PRINT_COUNT("CERT", c); | |
238 | if (i > 0) | |
239 | return; | |
240 | REF_ASSERT_ISNT(i < 0); | |
241 | ||
242 | #ifndef OPENSSL_NO_DH | |
243 | EVP_PKEY_free(c->dh_tmp); | |
244 | #endif | |
245 | ||
246 | ssl_cert_clear_certs(c); | |
247 | OPENSSL_free(c->conf_sigalgs); | |
248 | OPENSSL_free(c->client_sigalgs); | |
249 | OPENSSL_free(c->shared_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 | ||
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 ? s->cert->key : ctx->cert->key; | |
265 | if (!cpk) | |
266 | return 0; | |
267 | for (i = 0; i < sk_X509_num(chain); i++) { | |
268 | r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0); | |
269 | if (r != 1) { | |
270 | SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r); | |
271 | return 0; | |
272 | } | |
273 | } | |
274 | sk_X509_pop_free(cpk->chain, X509_free); | |
275 | cpk->chain = chain; | |
276 | return 1; | |
277 | } | |
278 | ||
279 | int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain) | |
280 | { | |
281 | STACK_OF(X509) *dchain; | |
282 | if (!chain) | |
283 | return ssl_cert_set0_chain(s, ctx, NULL); | |
284 | dchain = X509_chain_up_ref(chain); | |
285 | if (!dchain) | |
286 | return 0; | |
287 | if (!ssl_cert_set0_chain(s, ctx, dchain)) { | |
288 | sk_X509_pop_free(dchain, X509_free); | |
289 | return 0; | |
290 | } | |
291 | return 1; | |
292 | } | |
293 | ||
294 | int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) | |
295 | { | |
296 | int r; | |
297 | CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key; | |
298 | if (!cpk) | |
299 | return 0; | |
300 | r = ssl_security_cert(s, ctx, x, 0, 0); | |
301 | if (r != 1) { | |
302 | SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r); | |
303 | return 0; | |
304 | } | |
305 | if (!cpk->chain) | |
306 | cpk->chain = sk_X509_new_null(); | |
307 | if (!cpk->chain || !sk_X509_push(cpk->chain, x)) | |
308 | return 0; | |
309 | return 1; | |
310 | } | |
311 | ||
312 | int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) | |
313 | { | |
314 | if (!ssl_cert_add0_chain_cert(s, ctx, x)) | |
315 | return 0; | |
316 | X509_up_ref(x); | |
317 | return 1; | |
318 | } | |
319 | ||
320 | int ssl_cert_select_current(CERT *c, X509 *x) | |
321 | { | |
322 | int i; | |
323 | if (x == NULL) | |
324 | return 0; | |
325 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
326 | CERT_PKEY *cpk = c->pkeys + i; | |
327 | if (cpk->x509 == x && cpk->privatekey) { | |
328 | c->key = cpk; | |
329 | return 1; | |
330 | } | |
331 | } | |
332 | ||
333 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
334 | CERT_PKEY *cpk = c->pkeys + i; | |
335 | if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) { | |
336 | c->key = cpk; | |
337 | return 1; | |
338 | } | |
339 | } | |
340 | return 0; | |
341 | } | |
342 | ||
343 | int ssl_cert_set_current(CERT *c, long op) | |
344 | { | |
345 | int i, idx; | |
346 | if (!c) | |
347 | return 0; | |
348 | if (op == SSL_CERT_SET_FIRST) | |
349 | idx = 0; | |
350 | else if (op == SSL_CERT_SET_NEXT) { | |
351 | idx = (int)(c->key - c->pkeys + 1); | |
352 | if (idx >= SSL_PKEY_NUM) | |
353 | return 0; | |
354 | } else | |
355 | return 0; | |
356 | for (i = idx; i < SSL_PKEY_NUM; i++) { | |
357 | CERT_PKEY *cpk = c->pkeys + i; | |
358 | if (cpk->x509 && cpk->privatekey) { | |
359 | c->key = cpk; | |
360 | return 1; | |
361 | } | |
362 | } | |
363 | return 0; | |
364 | } | |
365 | ||
366 | void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg) | |
367 | { | |
368 | c->cert_cb = cb; | |
369 | c->cert_cb_arg = arg; | |
370 | } | |
371 | ||
372 | int ssl_verify_cert_chain(SSL *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 | ||
380 | if ((sk == NULL) || (sk_X509_num(sk) == 0)) | |
381 | return 0; | |
382 | ||
383 | if (s->cert->verify_store) | |
384 | verify_store = s->cert->verify_store; | |
385 | else | |
386 | verify_store = s->ctx->cert_store; | |
387 | ||
388 | ctx = X509_STORE_CTX_new(); | |
389 | if (ctx == NULL) { | |
390 | SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE); | |
391 | return 0; | |
392 | } | |
393 | ||
394 | x = sk_X509_value(sk, 0); | |
395 | if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) { | |
396 | SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB); | |
397 | goto end; | |
398 | } | |
399 | param = X509_STORE_CTX_get0_param(ctx); | |
400 | /* | |
401 | * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some | |
402 | * point, for now a single @SECLEVEL sets the same policy for TLS crypto | |
403 | * and PKI authentication. | |
404 | */ | |
405 | X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s)); | |
406 | ||
407 | /* Set suite B flags if needed */ | |
408 | X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s)); | |
409 | if (!X509_STORE_CTX_set_ex_data | |
410 | (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) { | |
411 | goto end; | |
412 | } | |
413 | ||
414 | /* Verify via DANE if enabled */ | |
415 | if (DANETLS_ENABLED(&s->dane)) | |
416 | X509_STORE_CTX_set0_dane(ctx, &s->dane); | |
417 | ||
418 | /* | |
419 | * We need to inherit the verify parameters. These can be determined by | |
420 | * the context: if its a server it will verify SSL client certificates or | |
421 | * vice versa. | |
422 | */ | |
423 | ||
424 | X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server"); | |
425 | /* | |
426 | * Anything non-default in "s->param" should overwrite anything in the ctx. | |
427 | */ | |
428 | X509_VERIFY_PARAM_set1(param, s->param); | |
429 | ||
430 | if (s->verify_callback) | |
431 | X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback); | |
432 | ||
433 | if (s->ctx->app_verify_callback != NULL) | |
434 | i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg); | |
435 | else | |
436 | i = X509_verify_cert(ctx); | |
437 | ||
438 | s->verify_result = X509_STORE_CTX_get_error(ctx); | |
439 | sk_X509_pop_free(s->verified_chain, X509_free); | |
440 | s->verified_chain = NULL; | |
441 | if (X509_STORE_CTX_get0_chain(ctx) != NULL) { | |
442 | s->verified_chain = X509_STORE_CTX_get1_chain(ctx); | |
443 | if (s->verified_chain == NULL) { | |
444 | SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE); | |
445 | i = 0; | |
446 | } | |
447 | } | |
448 | ||
449 | /* Move peername from the store context params to the SSL handle's */ | |
450 | X509_VERIFY_PARAM_move_peername(s->param, param); | |
451 | ||
452 | end: | |
453 | X509_STORE_CTX_free(ctx); | |
454 | return i; | |
455 | } | |
456 | ||
457 | static void set0_CA_list(STACK_OF(X509_NAME) **ca_list, | |
458 | STACK_OF(X509_NAME) *name_list) | |
459 | { | |
460 | sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); | |
461 | *ca_list = name_list; | |
462 | } | |
463 | ||
464 | STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) | |
465 | { | |
466 | int i; | |
467 | STACK_OF(X509_NAME) *ret; | |
468 | X509_NAME *name; | |
469 | ||
470 | ret = sk_X509_NAME_new_null(); | |
471 | if (ret == NULL) { | |
472 | SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE); | |
473 | return NULL; | |
474 | } | |
475 | for (i = 0; i < sk_X509_NAME_num(sk); i++) { | |
476 | name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); | |
477 | if (name == NULL || !sk_X509_NAME_push(ret, name)) { | |
478 | sk_X509_NAME_pop_free(ret, X509_NAME_free); | |
479 | X509_NAME_free(name); | |
480 | return NULL; | |
481 | } | |
482 | } | |
483 | return (ret); | |
484 | } | |
485 | ||
486 | void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) | |
487 | { | |
488 | set0_CA_list(&s->ca_names, name_list); | |
489 | } | |
490 | ||
491 | void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) | |
492 | { | |
493 | set0_CA_list(&ctx->ca_names, name_list); | |
494 | } | |
495 | ||
496 | const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx) | |
497 | { | |
498 | return ctx->ca_names; | |
499 | } | |
500 | ||
501 | const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s) | |
502 | { | |
503 | return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names; | |
504 | } | |
505 | ||
506 | void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) | |
507 | { | |
508 | SSL_CTX_set0_CA_list(ctx, name_list); | |
509 | } | |
510 | ||
511 | STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) | |
512 | { | |
513 | return ctx->ca_names; | |
514 | } | |
515 | ||
516 | void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) | |
517 | { | |
518 | SSL_set0_CA_list(s, name_list); | |
519 | } | |
520 | ||
521 | const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s) | |
522 | { | |
523 | return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL; | |
524 | } | |
525 | ||
526 | STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s) | |
527 | { | |
528 | if (!s->server) | |
529 | return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL; | |
530 | return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names; | |
531 | } | |
532 | ||
533 | static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x) | |
534 | { | |
535 | X509_NAME *name; | |
536 | ||
537 | if (x == NULL) | |
538 | return 0; | |
539 | if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL)) | |
540 | return 0; | |
541 | ||
542 | if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) | |
543 | return 0; | |
544 | ||
545 | if (!sk_X509_NAME_push(*sk, name)) { | |
546 | X509_NAME_free(name); | |
547 | return 0; | |
548 | } | |
549 | return 1; | |
550 | } | |
551 | ||
552 | int SSL_add1_CA_list(SSL *ssl, const X509 *x) | |
553 | { | |
554 | return add_ca_name(&ssl->ca_names, x); | |
555 | } | |
556 | ||
557 | int SSL_CTX_add1_CA_list(SSL_CTX *ctx, const X509 *x) | |
558 | { | |
559 | return add_ca_name(&ctx->ca_names, x); | |
560 | } | |
561 | ||
562 | int SSL_add_client_CA(SSL *ssl, X509 *x) | |
563 | { | |
564 | return add_ca_name(&ssl->ca_names, x); | |
565 | } | |
566 | ||
567 | int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) | |
568 | { | |
569 | return add_ca_name(&ctx->ca_names, x); | |
570 | } | |
571 | ||
572 | static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
573 | { | |
574 | return (X509_NAME_cmp(*a, *b)); | |
575 | } | |
576 | ||
577 | static int xname_cmp(const X509_NAME *a, const X509_NAME *b) | |
578 | { | |
579 | return X509_NAME_cmp(a, b); | |
580 | } | |
581 | ||
582 | static unsigned long xname_hash(const X509_NAME *a) | |
583 | { | |
584 | return X509_NAME_hash((X509_NAME *)a); | |
585 | } | |
586 | ||
587 | /** | |
588 | * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed; | |
589 | * it doesn't really have anything to do with clients (except that a common use | |
590 | * for a stack of CAs is to send it to the client). Actually, it doesn't have | |
591 | * much to do with CAs, either, since it will load any old cert. | |
592 | * \param file the file containing one or more certs. | |
593 | * \return a ::STACK containing the certs. | |
594 | */ | |
595 | STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) | |
596 | { | |
597 | BIO *in = BIO_new(BIO_s_file()); | |
598 | X509 *x = NULL; | |
599 | X509_NAME *xn = NULL; | |
600 | STACK_OF(X509_NAME) *ret = NULL; | |
601 | LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); | |
602 | ||
603 | if ((name_hash == NULL) || (in == NULL)) { | |
604 | SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); | |
605 | goto err; | |
606 | } | |
607 | ||
608 | if (!BIO_read_filename(in, file)) | |
609 | goto err; | |
610 | ||
611 | for (;;) { | |
612 | if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) | |
613 | break; | |
614 | if (ret == NULL) { | |
615 | ret = sk_X509_NAME_new_null(); | |
616 | if (ret == NULL) { | |
617 | SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); | |
618 | goto err; | |
619 | } | |
620 | } | |
621 | if ((xn = X509_get_subject_name(x)) == NULL) | |
622 | goto err; | |
623 | /* check for duplicates */ | |
624 | xn = X509_NAME_dup(xn); | |
625 | if (xn == NULL) | |
626 | goto err; | |
627 | if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { | |
628 | /* Duplicate. */ | |
629 | X509_NAME_free(xn); | |
630 | xn = NULL; | |
631 | } else { | |
632 | lh_X509_NAME_insert(name_hash, xn); | |
633 | if (!sk_X509_NAME_push(ret, xn)) | |
634 | goto err; | |
635 | } | |
636 | } | |
637 | goto done; | |
638 | ||
639 | err: | |
640 | X509_NAME_free(xn); | |
641 | sk_X509_NAME_pop_free(ret, X509_NAME_free); | |
642 | ret = NULL; | |
643 | done: | |
644 | BIO_free(in); | |
645 | X509_free(x); | |
646 | lh_X509_NAME_free(name_hash); | |
647 | if (ret != NULL) | |
648 | ERR_clear_error(); | |
649 | return (ret); | |
650 | } | |
651 | ||
652 | /** | |
653 | * Add a file of certs to a stack. | |
654 | * \param stack the stack to add to. | |
655 | * \param file the file to add from. All certs in this file that are not | |
656 | * already in the stack will be added. | |
657 | * \return 1 for success, 0 for failure. Note that in the case of failure some | |
658 | * certs may have been added to \c stack. | |
659 | */ | |
660 | ||
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 | ||
711 | /** | |
712 | * Add a directory of certs to a stack. | |
713 | * \param stack the stack to append to. | |
714 | * \param dir the directory to append from. All files in this directory will be | |
715 | * examined as potential certs. Any that are acceptable to | |
716 | * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be | |
717 | * included. | |
718 | * \return 1 for success, 0 for failure. Note that in the case of failure some | |
719 | * certs may have been added to \c stack. | |
720 | */ | |
721 | ||
722 | int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, | |
723 | const char *dir) | |
724 | { | |
725 | OPENSSL_DIR_CTX *d = NULL; | |
726 | const char *filename; | |
727 | int ret = 0; | |
728 | ||
729 | /* Note that a side effect is that the CAs will be sorted by name */ | |
730 | ||
731 | while ((filename = OPENSSL_DIR_read(&d, dir))) { | |
732 | char buf[1024]; | |
733 | int r; | |
734 | ||
735 | if (strlen(dir) + strlen(filename) + 2 > sizeof buf) { | |
736 | SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, | |
737 | SSL_R_PATH_TOO_LONG); | |
738 | goto err; | |
739 | } | |
740 | #ifdef OPENSSL_SYS_VMS | |
741 | r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename); | |
742 | #else | |
743 | r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename); | |
744 | #endif | |
745 | if (r <= 0 || r >= (int)sizeof(buf)) | |
746 | goto err; | |
747 | if (!SSL_add_file_cert_subjects_to_stack(stack, buf)) | |
748 | goto err; | |
749 | } | |
750 | ||
751 | if (errno) { | |
752 | SYSerr(SYS_F_OPENDIR, get_last_sys_error()); | |
753 | ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')"); | |
754 | SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB); | |
755 | goto err; | |
756 | } | |
757 | ||
758 | ret = 1; | |
759 | ||
760 | err: | |
761 | if (d) | |
762 | OPENSSL_DIR_end(&d); | |
763 | ||
764 | return ret; | |
765 | } | |
766 | ||
767 | /* Build a certificate chain for current certificate */ | |
768 | int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags) | |
769 | { | |
770 | CERT *c = s ? s->cert : ctx->cert; | |
771 | CERT_PKEY *cpk = c->key; | |
772 | X509_STORE *chain_store = NULL; | |
773 | X509_STORE_CTX *xs_ctx = NULL; | |
774 | STACK_OF(X509) *chain = NULL, *untrusted = NULL; | |
775 | X509 *x; | |
776 | int i, rv = 0; | |
777 | ||
778 | if (!cpk->x509) { | |
779 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET); | |
780 | goto err; | |
781 | } | |
782 | /* Rearranging and check the chain: add everything to a store */ | |
783 | if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { | |
784 | chain_store = X509_STORE_new(); | |
785 | if (chain_store == NULL) | |
786 | goto err; | |
787 | for (i = 0; i < sk_X509_num(cpk->chain); i++) { | |
788 | x = sk_X509_value(cpk->chain, i); | |
789 | if (!X509_STORE_add_cert(chain_store, x)) | |
790 | goto err; | |
791 | } | |
792 | /* Add EE cert too: it might be self signed */ | |
793 | if (!X509_STORE_add_cert(chain_store, cpk->x509)) | |
794 | goto err; | |
795 | } else { | |
796 | if (c->chain_store) | |
797 | chain_store = c->chain_store; | |
798 | else if (s) | |
799 | chain_store = s->ctx->cert_store; | |
800 | else | |
801 | chain_store = ctx->cert_store; | |
802 | ||
803 | if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) | |
804 | untrusted = cpk->chain; | |
805 | } | |
806 | ||
807 | xs_ctx = X509_STORE_CTX_new(); | |
808 | if (xs_ctx == NULL) { | |
809 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE); | |
810 | goto err; | |
811 | } | |
812 | if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) { | |
813 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB); | |
814 | goto err; | |
815 | } | |
816 | /* Set suite B flags if needed */ | |
817 | X509_STORE_CTX_set_flags(xs_ctx, | |
818 | c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS); | |
819 | ||
820 | i = X509_verify_cert(xs_ctx); | |
821 | if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { | |
822 | if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) | |
823 | ERR_clear_error(); | |
824 | i = 1; | |
825 | rv = 2; | |
826 | } | |
827 | if (i > 0) | |
828 | chain = X509_STORE_CTX_get1_chain(xs_ctx); | |
829 | if (i <= 0) { | |
830 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED); | |
831 | i = X509_STORE_CTX_get_error(xs_ctx); | |
832 | ERR_add_error_data(2, "Verify error:", | |
833 | X509_verify_cert_error_string(i)); | |
834 | ||
835 | goto err; | |
836 | } | |
837 | /* Remove EE certificate from chain */ | |
838 | x = sk_X509_shift(chain); | |
839 | X509_free(x); | |
840 | if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { | |
841 | if (sk_X509_num(chain) > 0) { | |
842 | /* See if last cert is self signed */ | |
843 | x = sk_X509_value(chain, sk_X509_num(chain) - 1); | |
844 | if (X509_get_extension_flags(x) & EXFLAG_SS) { | |
845 | x = sk_X509_pop(chain); | |
846 | X509_free(x); | |
847 | } | |
848 | } | |
849 | } | |
850 | /* | |
851 | * Check security level of all CA certificates: EE will have been checked | |
852 | * already. | |
853 | */ | |
854 | for (i = 0; i < sk_X509_num(chain); i++) { | |
855 | x = sk_X509_value(chain, i); | |
856 | rv = ssl_security_cert(s, ctx, x, 0, 0); | |
857 | if (rv != 1) { | |
858 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv); | |
859 | sk_X509_pop_free(chain, X509_free); | |
860 | rv = 0; | |
861 | goto err; | |
862 | } | |
863 | } | |
864 | sk_X509_pop_free(cpk->chain, X509_free); | |
865 | cpk->chain = chain; | |
866 | if (rv == 0) | |
867 | rv = 1; | |
868 | err: | |
869 | if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) | |
870 | X509_STORE_free(chain_store); | |
871 | X509_STORE_CTX_free(xs_ctx); | |
872 | ||
873 | return rv; | |
874 | } | |
875 | ||
876 | int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) | |
877 | { | |
878 | X509_STORE **pstore; | |
879 | if (chain) | |
880 | pstore = &c->chain_store; | |
881 | else | |
882 | pstore = &c->verify_store; | |
883 | X509_STORE_free(*pstore); | |
884 | *pstore = store; | |
885 | if (ref && store) | |
886 | X509_STORE_up_ref(store); | |
887 | return 1; | |
888 | } | |
889 | ||
890 | static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, | |
891 | int op, int bits, int nid, void *other, | |
892 | void *ex) | |
893 | { | |
894 | int level, minbits; | |
895 | static const int minbits_table[5] = { 80, 112, 128, 192, 256 }; | |
896 | if (ctx) | |
897 | level = SSL_CTX_get_security_level(ctx); | |
898 | else | |
899 | level = SSL_get_security_level(s); | |
900 | ||
901 | if (level <= 0) { | |
902 | /* | |
903 | * No EDH keys weaker than 1024-bits even at level 0, otherwise, | |
904 | * anything goes. | |
905 | */ | |
906 | if (op == SSL_SECOP_TMP_DH && bits < 80) | |
907 | return 0; | |
908 | return 1; | |
909 | } | |
910 | if (level > 5) | |
911 | level = 5; | |
912 | minbits = minbits_table[level - 1]; | |
913 | switch (op) { | |
914 | case SSL_SECOP_CIPHER_SUPPORTED: | |
915 | case SSL_SECOP_CIPHER_SHARED: | |
916 | case SSL_SECOP_CIPHER_CHECK: | |
917 | { | |
918 | const SSL_CIPHER *c = other; | |
919 | /* No ciphers below security level */ | |
920 | if (bits < minbits) | |
921 | return 0; | |
922 | /* No unauthenticated ciphersuites */ | |
923 | if (c->algorithm_auth & SSL_aNULL) | |
924 | return 0; | |
925 | /* No MD5 mac ciphersuites */ | |
926 | if (c->algorithm_mac & SSL_MD5) | |
927 | return 0; | |
928 | /* SHA1 HMAC is 160 bits of security */ | |
929 | if (minbits > 160 && c->algorithm_mac & SSL_SHA1) | |
930 | return 0; | |
931 | /* Level 2: no RC4 */ | |
932 | if (level >= 2 && c->algorithm_enc == SSL_RC4) | |
933 | return 0; | |
934 | /* Level 3: forward secure ciphersuites only */ | |
935 | if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH))) | |
936 | return 0; | |
937 | break; | |
938 | } | |
939 | case SSL_SECOP_VERSION: | |
940 | if (!SSL_IS_DTLS(s)) { | |
941 | /* SSLv3 not allowed at level 2 */ | |
942 | if (nid <= SSL3_VERSION && level >= 2) | |
943 | return 0; | |
944 | /* TLS v1.1 and above only for level 3 */ | |
945 | if (nid <= TLS1_VERSION && level >= 3) | |
946 | return 0; | |
947 | /* TLS v1.2 only for level 4 and above */ | |
948 | if (nid <= TLS1_1_VERSION && level >= 4) | |
949 | return 0; | |
950 | } else { | |
951 | /* DTLS v1.2 only for level 4 and above */ | |
952 | if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4) | |
953 | return 0; | |
954 | } | |
955 | break; | |
956 | ||
957 | case SSL_SECOP_COMPRESSION: | |
958 | if (level >= 2) | |
959 | return 0; | |
960 | break; | |
961 | case SSL_SECOP_TICKET: | |
962 | if (level >= 3) | |
963 | return 0; | |
964 | break; | |
965 | default: | |
966 | if (bits < minbits) | |
967 | return 0; | |
968 | } | |
969 | return 1; | |
970 | } | |
971 | ||
972 | int ssl_security(const SSL *s, int op, int bits, int nid, void *other) | |
973 | { | |
974 | return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex); | |
975 | } | |
976 | ||
977 | int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other) | |
978 | { | |
979 | return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, | |
980 | ctx->cert->sec_ex); | |
981 | } | |
982 | ||
983 | const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx) | |
984 | { | |
985 | int nid = EVP_PKEY_id(pk); | |
986 | size_t i; | |
987 | ||
988 | if (nid == NID_undef) | |
989 | return NULL; | |
990 | ||
991 | for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { | |
992 | if (ssl_cert_info[i].nid == nid) { | |
993 | if (pidx != NULL) | |
994 | *pidx = i; | |
995 | return &ssl_cert_info[i]; | |
996 | } | |
997 | } | |
998 | return NULL; | |
999 | } | |
1000 | ||
1001 | const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx) | |
1002 | { | |
1003 | if (idx >= OSSL_NELEM(ssl_cert_info)) | |
1004 | return 0; | |
1005 | return &ssl_cert_info[idx]; | |
1006 | } |