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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 | #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_locl.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 | ||
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 | ||
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 | ||
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 | ||
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 | /* Shared sigalgs also NULL */ | |
158 | ret->shared_sigalgs = NULL; | |
159 | /* Copy any custom client certificate types */ | |
160 | if (cert->ctype) { | |
161 | ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len); | |
162 | if (ret->ctype == NULL) | |
163 | goto err; | |
164 | ret->ctype_len = cert->ctype_len; | |
165 | } | |
166 | ||
167 | ret->cert_flags = cert->cert_flags; | |
168 | ||
169 | ret->cert_cb = cert->cert_cb; | |
170 | ret->cert_cb_arg = cert->cert_cb_arg; | |
171 | ||
172 | if (cert->verify_store) { | |
173 | X509_STORE_up_ref(cert->verify_store); | |
174 | ret->verify_store = cert->verify_store; | |
175 | } | |
176 | ||
177 | if (cert->chain_store) { | |
178 | X509_STORE_up_ref(cert->chain_store); | |
179 | ret->chain_store = cert->chain_store; | |
180 | } | |
181 | ||
182 | ret->sec_cb = cert->sec_cb; | |
183 | ret->sec_level = cert->sec_level; | |
184 | ret->sec_ex = cert->sec_ex; | |
185 | ||
186 | if (!custom_exts_copy(&ret->custext, &cert->custext)) | |
187 | goto err; | |
188 | #ifndef OPENSSL_NO_PSK | |
189 | if (cert->psk_identity_hint) { | |
190 | ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint); | |
191 | if (ret->psk_identity_hint == NULL) | |
192 | goto err; | |
193 | } | |
194 | #endif | |
195 | return ret; | |
196 | ||
197 | err: | |
198 | ssl_cert_free(ret); | |
199 | ||
200 | return NULL; | |
201 | } | |
202 | ||
203 | /* Free up and clear all certificates and chains */ | |
204 | ||
205 | void ssl_cert_clear_certs(CERT *c) | |
206 | { | |
207 | int i; | |
208 | if (c == NULL) | |
209 | return; | |
210 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
211 | CERT_PKEY *cpk = c->pkeys + i; | |
212 | X509_free(cpk->x509); | |
213 | cpk->x509 = NULL; | |
214 | EVP_PKEY_free(cpk->privatekey); | |
215 | cpk->privatekey = NULL; | |
216 | sk_X509_pop_free(cpk->chain, X509_free); | |
217 | cpk->chain = NULL; | |
218 | OPENSSL_free(cpk->serverinfo); | |
219 | cpk->serverinfo = NULL; | |
220 | cpk->serverinfo_length = 0; | |
221 | } | |
222 | } | |
223 | ||
224 | void ssl_cert_free(CERT *c) | |
225 | { | |
226 | int i; | |
227 | ||
228 | if (c == NULL) | |
229 | return; | |
230 | ||
231 | CRYPTO_DOWN_REF(&c->references, &i, c->lock); | |
232 | REF_PRINT_COUNT("CERT", c); | |
233 | if (i > 0) | |
234 | return; | |
235 | REF_ASSERT_ISNT(i < 0); | |
236 | ||
237 | #ifndef OPENSSL_NO_DH | |
238 | EVP_PKEY_free(c->dh_tmp); | |
239 | #endif | |
240 | ||
241 | ssl_cert_clear_certs(c); | |
242 | OPENSSL_free(c->conf_sigalgs); | |
243 | OPENSSL_free(c->client_sigalgs); | |
244 | OPENSSL_free(c->shared_sigalgs); | |
245 | OPENSSL_free(c->ctype); | |
246 | X509_STORE_free(c->verify_store); | |
247 | X509_STORE_free(c->chain_store); | |
248 | custom_exts_free(&c->custext); | |
249 | #ifndef OPENSSL_NO_PSK | |
250 | OPENSSL_free(c->psk_identity_hint); | |
251 | #endif | |
252 | CRYPTO_THREAD_lock_free(c->lock); | |
253 | OPENSSL_free(c); | |
254 | } | |
255 | ||
256 | int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain) | |
257 | { | |
258 | int i, r; | |
259 | CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key; | |
260 | if (!cpk) | |
261 | return 0; | |
262 | for (i = 0; i < sk_X509_num(chain); i++) { | |
263 | r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0); | |
264 | if (r != 1) { | |
265 | SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r); | |
266 | return 0; | |
267 | } | |
268 | } | |
269 | sk_X509_pop_free(cpk->chain, X509_free); | |
270 | cpk->chain = chain; | |
271 | return 1; | |
272 | } | |
273 | ||
274 | int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain) | |
275 | { | |
276 | STACK_OF(X509) *dchain; | |
277 | if (!chain) | |
278 | return ssl_cert_set0_chain(s, ctx, NULL); | |
279 | dchain = X509_chain_up_ref(chain); | |
280 | if (!dchain) | |
281 | return 0; | |
282 | if (!ssl_cert_set0_chain(s, ctx, dchain)) { | |
283 | sk_X509_pop_free(dchain, X509_free); | |
284 | return 0; | |
285 | } | |
286 | return 1; | |
287 | } | |
288 | ||
289 | int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) | |
290 | { | |
291 | int r; | |
292 | CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key; | |
293 | if (!cpk) | |
294 | return 0; | |
295 | r = ssl_security_cert(s, ctx, x, 0, 0); | |
296 | if (r != 1) { | |
297 | SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r); | |
298 | return 0; | |
299 | } | |
300 | if (!cpk->chain) | |
301 | cpk->chain = sk_X509_new_null(); | |
302 | if (!cpk->chain || !sk_X509_push(cpk->chain, x)) | |
303 | return 0; | |
304 | return 1; | |
305 | } | |
306 | ||
307 | int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x) | |
308 | { | |
309 | if (!ssl_cert_add0_chain_cert(s, ctx, x)) | |
310 | return 0; | |
311 | X509_up_ref(x); | |
312 | return 1; | |
313 | } | |
314 | ||
315 | int ssl_cert_select_current(CERT *c, X509 *x) | |
316 | { | |
317 | int i; | |
318 | if (x == NULL) | |
319 | return 0; | |
320 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
321 | CERT_PKEY *cpk = c->pkeys + i; | |
322 | if (cpk->x509 == x && cpk->privatekey) { | |
323 | c->key = cpk; | |
324 | return 1; | |
325 | } | |
326 | } | |
327 | ||
328 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
329 | CERT_PKEY *cpk = c->pkeys + i; | |
330 | if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) { | |
331 | c->key = cpk; | |
332 | return 1; | |
333 | } | |
334 | } | |
335 | return 0; | |
336 | } | |
337 | ||
338 | int ssl_cert_set_current(CERT *c, long op) | |
339 | { | |
340 | int i, idx; | |
341 | if (!c) | |
342 | return 0; | |
343 | if (op == SSL_CERT_SET_FIRST) | |
344 | idx = 0; | |
345 | else if (op == SSL_CERT_SET_NEXT) { | |
346 | idx = (int)(c->key - c->pkeys + 1); | |
347 | if (idx >= SSL_PKEY_NUM) | |
348 | return 0; | |
349 | } else | |
350 | return 0; | |
351 | for (i = idx; i < SSL_PKEY_NUM; i++) { | |
352 | CERT_PKEY *cpk = c->pkeys + i; | |
353 | if (cpk->x509 && cpk->privatekey) { | |
354 | c->key = cpk; | |
355 | return 1; | |
356 | } | |
357 | } | |
358 | return 0; | |
359 | } | |
360 | ||
361 | void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg) | |
362 | { | |
363 | c->cert_cb = cb; | |
364 | c->cert_cb_arg = arg; | |
365 | } | |
366 | ||
367 | int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) | |
368 | { | |
369 | X509 *x; | |
370 | int i = 0; | |
371 | X509_STORE *verify_store; | |
372 | X509_STORE_CTX *ctx = NULL; | |
373 | X509_VERIFY_PARAM *param; | |
374 | ||
375 | if ((sk == NULL) || (sk_X509_num(sk) == 0)) | |
376 | return 0; | |
377 | ||
378 | if (s->cert->verify_store) | |
379 | verify_store = s->cert->verify_store; | |
380 | else | |
381 | verify_store = s->ctx->cert_store; | |
382 | ||
383 | ctx = X509_STORE_CTX_new(); | |
384 | if (ctx == NULL) { | |
385 | SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | x = sk_X509_value(sk, 0); | |
390 | if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) { | |
391 | SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB); | |
392 | goto end; | |
393 | } | |
394 | param = X509_STORE_CTX_get0_param(ctx); | |
395 | /* | |
396 | * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some | |
397 | * point, for now a single @SECLEVEL sets the same policy for TLS crypto | |
398 | * and PKI authentication. | |
399 | */ | |
400 | X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s)); | |
401 | ||
402 | /* Set suite B flags if needed */ | |
403 | X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s)); | |
404 | if (!X509_STORE_CTX_set_ex_data | |
405 | (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) { | |
406 | goto end; | |
407 | } | |
408 | ||
409 | /* Verify via DANE if enabled */ | |
410 | if (DANETLS_ENABLED(&s->dane)) | |
411 | X509_STORE_CTX_set0_dane(ctx, &s->dane); | |
412 | ||
413 | /* | |
414 | * We need to inherit the verify parameters. These can be determined by | |
415 | * the context: if its a server it will verify SSL client certificates or | |
416 | * vice versa. | |
417 | */ | |
418 | ||
419 | X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server"); | |
420 | /* | |
421 | * Anything non-default in "s->param" should overwrite anything in the ctx. | |
422 | */ | |
423 | X509_VERIFY_PARAM_set1(param, s->param); | |
424 | ||
425 | if (s->verify_callback) | |
426 | X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback); | |
427 | ||
428 | if (s->ctx->app_verify_callback != NULL) | |
429 | i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg); | |
430 | else | |
431 | i = X509_verify_cert(ctx); | |
432 | ||
433 | s->verify_result = X509_STORE_CTX_get_error(ctx); | |
434 | sk_X509_pop_free(s->verified_chain, X509_free); | |
435 | s->verified_chain = NULL; | |
436 | if (X509_STORE_CTX_get0_chain(ctx) != NULL) { | |
437 | s->verified_chain = X509_STORE_CTX_get1_chain(ctx); | |
438 | if (s->verified_chain == NULL) { | |
439 | SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE); | |
440 | i = 0; | |
441 | } | |
442 | } | |
443 | ||
444 | /* Move peername from the store context params to the SSL handle's */ | |
445 | X509_VERIFY_PARAM_move_peername(s->param, param); | |
446 | ||
447 | end: | |
448 | X509_STORE_CTX_free(ctx); | |
449 | return i; | |
450 | } | |
451 | ||
452 | static void set0_CA_list(STACK_OF(X509_NAME) **ca_list, | |
453 | STACK_OF(X509_NAME) *name_list) | |
454 | { | |
455 | sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); | |
456 | *ca_list = name_list; | |
457 | } | |
458 | ||
459 | STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) | |
460 | { | |
461 | int i; | |
462 | const int num = sk_X509_NAME_num(sk); | |
463 | STACK_OF(X509_NAME) *ret; | |
464 | X509_NAME *name; | |
465 | ||
466 | ret = sk_X509_NAME_new_reserve(NULL, num); | |
467 | if (ret == NULL) { | |
468 | SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE); | |
469 | return NULL; | |
470 | } | |
471 | for (i = 0; i < num; i++) { | |
472 | name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); | |
473 | if (name == NULL) { | |
474 | SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE); | |
475 | sk_X509_NAME_pop_free(ret, X509_NAME_free); | |
476 | return NULL; | |
477 | } | |
478 | sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */ | |
479 | } | |
480 | return ret; | |
481 | } | |
482 | ||
483 | void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) | |
484 | { | |
485 | set0_CA_list(&s->ca_names, name_list); | |
486 | } | |
487 | ||
488 | void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) | |
489 | { | |
490 | set0_CA_list(&ctx->ca_names, name_list); | |
491 | } | |
492 | ||
493 | const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx) | |
494 | { | |
495 | return ctx->ca_names; | |
496 | } | |
497 | ||
498 | const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s) | |
499 | { | |
500 | return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names; | |
501 | } | |
502 | ||
503 | void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) | |
504 | { | |
505 | SSL_CTX_set0_CA_list(ctx, name_list); | |
506 | } | |
507 | ||
508 | STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) | |
509 | { | |
510 | return ctx->ca_names; | |
511 | } | |
512 | ||
513 | void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) | |
514 | { | |
515 | SSL_set0_CA_list(s, name_list); | |
516 | } | |
517 | ||
518 | const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s) | |
519 | { | |
520 | return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL; | |
521 | } | |
522 | ||
523 | STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s) | |
524 | { | |
525 | if (!s->server) | |
526 | return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL; | |
527 | return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names; | |
528 | } | |
529 | ||
530 | static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x) | |
531 | { | |
532 | X509_NAME *name; | |
533 | ||
534 | if (x == NULL) | |
535 | return 0; | |
536 | if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL)) | |
537 | return 0; | |
538 | ||
539 | if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) | |
540 | return 0; | |
541 | ||
542 | if (!sk_X509_NAME_push(*sk, name)) { | |
543 | X509_NAME_free(name); | |
544 | return 0; | |
545 | } | |
546 | return 1; | |
547 | } | |
548 | ||
549 | int SSL_add1_CA_list(SSL *ssl, const X509 *x) | |
550 | { | |
551 | return add_ca_name(&ssl->ca_names, x); | |
552 | } | |
553 | ||
554 | int SSL_CTX_add1_CA_list(SSL_CTX *ctx, const X509 *x) | |
555 | { | |
556 | return add_ca_name(&ctx->ca_names, x); | |
557 | } | |
558 | ||
559 | int SSL_add_client_CA(SSL *ssl, X509 *x) | |
560 | { | |
561 | return add_ca_name(&ssl->ca_names, x); | |
562 | } | |
563 | ||
564 | int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) | |
565 | { | |
566 | return add_ca_name(&ctx->ca_names, x); | |
567 | } | |
568 | ||
569 | static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
570 | { | |
571 | return X509_NAME_cmp(*a, *b); | |
572 | } | |
573 | ||
574 | static int xname_cmp(const X509_NAME *a, const X509_NAME *b) | |
575 | { | |
576 | return X509_NAME_cmp(a, b); | |
577 | } | |
578 | ||
579 | static unsigned long xname_hash(const X509_NAME *a) | |
580 | { | |
581 | return X509_NAME_hash((X509_NAME *)a); | |
582 | } | |
583 | ||
584 | /** | |
585 | * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed; | |
586 | * it doesn't really have anything to do with clients (except that a common use | |
587 | * for a stack of CAs is to send it to the client). Actually, it doesn't have | |
588 | * much to do with CAs, either, since it will load any old cert. | |
589 | * \param file the file containing one or more certs. | |
590 | * \return a ::STACK containing the certs. | |
591 | */ | |
592 | STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) | |
593 | { | |
594 | BIO *in = BIO_new(BIO_s_file()); | |
595 | X509 *x = NULL; | |
596 | X509_NAME *xn = NULL; | |
597 | STACK_OF(X509_NAME) *ret = NULL; | |
598 | LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); | |
599 | ||
600 | if ((name_hash == NULL) || (in == NULL)) { | |
601 | SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); | |
602 | goto err; | |
603 | } | |
604 | ||
605 | if (!BIO_read_filename(in, file)) | |
606 | goto err; | |
607 | ||
608 | for (;;) { | |
609 | if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) | |
610 | break; | |
611 | if (ret == NULL) { | |
612 | ret = sk_X509_NAME_new_null(); | |
613 | if (ret == NULL) { | |
614 | SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); | |
615 | goto err; | |
616 | } | |
617 | } | |
618 | if ((xn = X509_get_subject_name(x)) == NULL) | |
619 | goto err; | |
620 | /* check for duplicates */ | |
621 | xn = X509_NAME_dup(xn); | |
622 | if (xn == NULL) | |
623 | goto err; | |
624 | if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { | |
625 | /* Duplicate. */ | |
626 | X509_NAME_free(xn); | |
627 | xn = NULL; | |
628 | } else { | |
629 | lh_X509_NAME_insert(name_hash, xn); | |
630 | if (!sk_X509_NAME_push(ret, xn)) | |
631 | goto err; | |
632 | } | |
633 | } | |
634 | goto done; | |
635 | ||
636 | err: | |
637 | X509_NAME_free(xn); | |
638 | sk_X509_NAME_pop_free(ret, X509_NAME_free); | |
639 | ret = NULL; | |
640 | done: | |
641 | BIO_free(in); | |
642 | X509_free(x); | |
643 | lh_X509_NAME_free(name_hash); | |
644 | if (ret != NULL) | |
645 | ERR_clear_error(); | |
646 | return ret; | |
647 | } | |
648 | ||
649 | /** | |
650 | * Add a file of certs to a stack. | |
651 | * \param stack the stack to add to. | |
652 | * \param file the file to add from. All certs in this file that are not | |
653 | * already in the stack will be added. | |
654 | * \return 1 for success, 0 for failure. Note that in the case of failure some | |
655 | * certs may have been added to \c stack. | |
656 | */ | |
657 | ||
658 | int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, | |
659 | const char *file) | |
660 | { | |
661 | BIO *in; | |
662 | X509 *x = NULL; | |
663 | X509_NAME *xn = NULL; | |
664 | int ret = 1; | |
665 | int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b); | |
666 | ||
667 | oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); | |
668 | ||
669 | in = BIO_new(BIO_s_file()); | |
670 | ||
671 | if (in == NULL) { | |
672 | SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE); | |
673 | goto err; | |
674 | } | |
675 | ||
676 | if (!BIO_read_filename(in, file)) | |
677 | goto err; | |
678 | ||
679 | for (;;) { | |
680 | if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) | |
681 | break; | |
682 | if ((xn = X509_get_subject_name(x)) == NULL) | |
683 | goto err; | |
684 | xn = X509_NAME_dup(xn); | |
685 | if (xn == NULL) | |
686 | goto err; | |
687 | if (sk_X509_NAME_find(stack, xn) >= 0) { | |
688 | /* Duplicate. */ | |
689 | X509_NAME_free(xn); | |
690 | } else if (!sk_X509_NAME_push(stack, xn)) { | |
691 | X509_NAME_free(xn); | |
692 | goto err; | |
693 | } | |
694 | } | |
695 | ||
696 | ERR_clear_error(); | |
697 | goto done; | |
698 | ||
699 | err: | |
700 | ret = 0; | |
701 | done: | |
702 | BIO_free(in); | |
703 | X509_free(x); | |
704 | (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); | |
705 | return ret; | |
706 | } | |
707 | ||
708 | /** | |
709 | * Add a directory of certs to a stack. | |
710 | * \param stack the stack to append to. | |
711 | * \param dir the directory to append from. All files in this directory will be | |
712 | * examined as potential certs. Any that are acceptable to | |
713 | * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be | |
714 | * included. | |
715 | * \return 1 for success, 0 for failure. Note that in the case of failure some | |
716 | * certs may have been added to \c stack. | |
717 | */ | |
718 | ||
719 | int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, | |
720 | const char *dir) | |
721 | { | |
722 | OPENSSL_DIR_CTX *d = NULL; | |
723 | const char *filename; | |
724 | int ret = 0; | |
725 | ||
726 | /* Note that a side effect is that the CAs will be sorted by name */ | |
727 | ||
728 | while ((filename = OPENSSL_DIR_read(&d, dir))) { | |
729 | char buf[1024]; | |
730 | int r; | |
731 | ||
732 | if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) { | |
733 | SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, | |
734 | SSL_R_PATH_TOO_LONG); | |
735 | goto err; | |
736 | } | |
737 | #ifdef OPENSSL_SYS_VMS | |
738 | r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename); | |
739 | #else | |
740 | r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename); | |
741 | #endif | |
742 | if (r <= 0 || r >= (int)sizeof(buf)) | |
743 | goto err; | |
744 | if (!SSL_add_file_cert_subjects_to_stack(stack, buf)) | |
745 | goto err; | |
746 | } | |
747 | ||
748 | if (errno) { | |
749 | SYSerr(SYS_F_OPENDIR, get_last_sys_error()); | |
750 | ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')"); | |
751 | SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB); | |
752 | goto err; | |
753 | } | |
754 | ||
755 | ret = 1; | |
756 | ||
757 | err: | |
758 | if (d) | |
759 | OPENSSL_DIR_end(&d); | |
760 | ||
761 | return ret; | |
762 | } | |
763 | ||
764 | /* Build a certificate chain for current certificate */ | |
765 | int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags) | |
766 | { | |
767 | CERT *c = s ? s->cert : ctx->cert; | |
768 | CERT_PKEY *cpk = c->key; | |
769 | X509_STORE *chain_store = NULL; | |
770 | X509_STORE_CTX *xs_ctx = NULL; | |
771 | STACK_OF(X509) *chain = NULL, *untrusted = NULL; | |
772 | X509 *x; | |
773 | int i, rv = 0; | |
774 | ||
775 | if (!cpk->x509) { | |
776 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET); | |
777 | goto err; | |
778 | } | |
779 | /* Rearranging and check the chain: add everything to a store */ | |
780 | if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { | |
781 | chain_store = X509_STORE_new(); | |
782 | if (chain_store == NULL) | |
783 | goto err; | |
784 | for (i = 0; i < sk_X509_num(cpk->chain); i++) { | |
785 | x = sk_X509_value(cpk->chain, i); | |
786 | if (!X509_STORE_add_cert(chain_store, x)) | |
787 | goto err; | |
788 | } | |
789 | /* Add EE cert too: it might be self signed */ | |
790 | if (!X509_STORE_add_cert(chain_store, cpk->x509)) | |
791 | goto err; | |
792 | } else { | |
793 | if (c->chain_store) | |
794 | chain_store = c->chain_store; | |
795 | else if (s) | |
796 | chain_store = s->ctx->cert_store; | |
797 | else | |
798 | chain_store = ctx->cert_store; | |
799 | ||
800 | if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) | |
801 | untrusted = cpk->chain; | |
802 | } | |
803 | ||
804 | xs_ctx = X509_STORE_CTX_new(); | |
805 | if (xs_ctx == NULL) { | |
806 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE); | |
807 | goto err; | |
808 | } | |
809 | if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) { | |
810 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB); | |
811 | goto err; | |
812 | } | |
813 | /* Set suite B flags if needed */ | |
814 | X509_STORE_CTX_set_flags(xs_ctx, | |
815 | c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS); | |
816 | ||
817 | i = X509_verify_cert(xs_ctx); | |
818 | if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { | |
819 | if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) | |
820 | ERR_clear_error(); | |
821 | i = 1; | |
822 | rv = 2; | |
823 | } | |
824 | if (i > 0) | |
825 | chain = X509_STORE_CTX_get1_chain(xs_ctx); | |
826 | if (i <= 0) { | |
827 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED); | |
828 | i = X509_STORE_CTX_get_error(xs_ctx); | |
829 | ERR_add_error_data(2, "Verify error:", | |
830 | X509_verify_cert_error_string(i)); | |
831 | ||
832 | goto err; | |
833 | } | |
834 | /* Remove EE certificate from chain */ | |
835 | x = sk_X509_shift(chain); | |
836 | X509_free(x); | |
837 | if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { | |
838 | if (sk_X509_num(chain) > 0) { | |
839 | /* See if last cert is self signed */ | |
840 | x = sk_X509_value(chain, sk_X509_num(chain) - 1); | |
841 | if (X509_get_extension_flags(x) & EXFLAG_SS) { | |
842 | x = sk_X509_pop(chain); | |
843 | X509_free(x); | |
844 | } | |
845 | } | |
846 | } | |
847 | /* | |
848 | * Check security level of all CA certificates: EE will have been checked | |
849 | * already. | |
850 | */ | |
851 | for (i = 0; i < sk_X509_num(chain); i++) { | |
852 | x = sk_X509_value(chain, i); | |
853 | rv = ssl_security_cert(s, ctx, x, 0, 0); | |
854 | if (rv != 1) { | |
855 | SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv); | |
856 | sk_X509_pop_free(chain, X509_free); | |
857 | rv = 0; | |
858 | goto err; | |
859 | } | |
860 | } | |
861 | sk_X509_pop_free(cpk->chain, X509_free); | |
862 | cpk->chain = chain; | |
863 | if (rv == 0) | |
864 | rv = 1; | |
865 | err: | |
866 | if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) | |
867 | X509_STORE_free(chain_store); | |
868 | X509_STORE_CTX_free(xs_ctx); | |
869 | ||
870 | return rv; | |
871 | } | |
872 | ||
873 | int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) | |
874 | { | |
875 | X509_STORE **pstore; | |
876 | if (chain) | |
877 | pstore = &c->chain_store; | |
878 | else | |
879 | pstore = &c->verify_store; | |
880 | X509_STORE_free(*pstore); | |
881 | *pstore = store; | |
882 | if (ref && store) | |
883 | X509_STORE_up_ref(store); | |
884 | return 1; | |
885 | } | |
886 | ||
887 | static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, | |
888 | int op, int bits, int nid, void *other, | |
889 | void *ex) | |
890 | { | |
891 | int level, minbits; | |
892 | static const int minbits_table[5] = { 80, 112, 128, 192, 256 }; | |
893 | if (ctx) | |
894 | level = SSL_CTX_get_security_level(ctx); | |
895 | else | |
896 | level = SSL_get_security_level(s); | |
897 | ||
898 | if (level <= 0) { | |
899 | /* | |
900 | * No EDH keys weaker than 1024-bits even at level 0, otherwise, | |
901 | * anything goes. | |
902 | */ | |
903 | if (op == SSL_SECOP_TMP_DH && bits < 80) | |
904 | return 0; | |
905 | return 1; | |
906 | } | |
907 | if (level > 5) | |
908 | level = 5; | |
909 | minbits = minbits_table[level - 1]; | |
910 | switch (op) { | |
911 | case SSL_SECOP_CIPHER_SUPPORTED: | |
912 | case SSL_SECOP_CIPHER_SHARED: | |
913 | case SSL_SECOP_CIPHER_CHECK: | |
914 | { | |
915 | const SSL_CIPHER *c = other; | |
916 | /* No ciphers below security level */ | |
917 | if (bits < minbits) | |
918 | return 0; | |
919 | /* No unauthenticated ciphersuites */ | |
920 | if (c->algorithm_auth & SSL_aNULL) | |
921 | return 0; | |
922 | /* No MD5 mac ciphersuites */ | |
923 | if (c->algorithm_mac & SSL_MD5) | |
924 | return 0; | |
925 | /* SHA1 HMAC is 160 bits of security */ | |
926 | if (minbits > 160 && c->algorithm_mac & SSL_SHA1) | |
927 | return 0; | |
928 | /* Level 2: no RC4 */ | |
929 | if (level >= 2 && c->algorithm_enc == SSL_RC4) | |
930 | return 0; | |
931 | /* Level 3: forward secure ciphersuites only */ | |
932 | if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH))) | |
933 | return 0; | |
934 | break; | |
935 | } | |
936 | case SSL_SECOP_VERSION: | |
937 | if (!SSL_IS_DTLS(s)) { | |
938 | /* SSLv3 not allowed at level 2 */ | |
939 | if (nid <= SSL3_VERSION && level >= 2) | |
940 | return 0; | |
941 | /* TLS v1.1 and above only for level 3 */ | |
942 | if (nid <= TLS1_VERSION && level >= 3) | |
943 | return 0; | |
944 | /* TLS v1.2 only for level 4 and above */ | |
945 | if (nid <= TLS1_1_VERSION && level >= 4) | |
946 | return 0; | |
947 | } else { | |
948 | /* DTLS v1.2 only for level 4 and above */ | |
949 | if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4) | |
950 | return 0; | |
951 | } | |
952 | break; | |
953 | ||
954 | case SSL_SECOP_COMPRESSION: | |
955 | if (level >= 2) | |
956 | return 0; | |
957 | break; | |
958 | case SSL_SECOP_TICKET: | |
959 | if (level >= 3) | |
960 | return 0; | |
961 | break; | |
962 | default: | |
963 | if (bits < minbits) | |
964 | return 0; | |
965 | } | |
966 | return 1; | |
967 | } | |
968 | ||
969 | int ssl_security(const SSL *s, int op, int bits, int nid, void *other) | |
970 | { | |
971 | return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex); | |
972 | } | |
973 | ||
974 | int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other) | |
975 | { | |
976 | return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, | |
977 | ctx->cert->sec_ex); | |
978 | } | |
979 | ||
980 | const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx) | |
981 | { | |
982 | int nid = EVP_PKEY_id(pk); | |
983 | size_t i; | |
984 | ||
985 | if (nid == NID_undef) | |
986 | return NULL; | |
987 | ||
988 | for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { | |
989 | if (ssl_cert_info[i].nid == nid) { | |
990 | if (pidx != NULL) | |
991 | *pidx = i; | |
992 | return &ssl_cert_info[i]; | |
993 | } | |
994 | } | |
995 | return NULL; | |
996 | } | |
997 | ||
998 | const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx) | |
999 | { | |
1000 | if (idx >= OSSL_NELEM(ssl_cert_info)) | |
1001 | return NULL; | |
1002 | return &ssl_cert_info[idx]; | |
1003 | } |