/src/boringssl/crypto/x509/x509_vpm.cc
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1 | | // Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved. |
2 | | // |
3 | | // Licensed under the Apache License, Version 2.0 (the "License"); |
4 | | // you may not use this file except in compliance with the License. |
5 | | // You may obtain a copy of the License at |
6 | | // |
7 | | // https://www.apache.org/licenses/LICENSE-2.0 |
8 | | // |
9 | | // Unless required by applicable law or agreed to in writing, software |
10 | | // distributed under the License is distributed on an "AS IS" BASIS, |
11 | | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | | // See the License for the specific language governing permissions and |
13 | | // limitations under the License. |
14 | | |
15 | | #include <string.h> |
16 | | |
17 | | #include <openssl/mem.h> |
18 | | #include <openssl/obj.h> |
19 | | #include <openssl/stack.h> |
20 | | #include <openssl/x509.h> |
21 | | |
22 | | #include "../internal.h" |
23 | | #include "internal.h" |
24 | | |
25 | | |
26 | | // X509_VERIFY_PARAM functions |
27 | | |
28 | 0 | #define SET_HOST 0 |
29 | 0 | #define ADD_HOST 1 |
30 | | |
31 | 0 | static void str_free(char *s) { OPENSSL_free(s); } |
32 | | |
33 | | static int int_x509_param_set_hosts(X509_VERIFY_PARAM *param, int mode, |
34 | 0 | const char *name, size_t namelen) { |
35 | 0 | char *copy; |
36 | |
|
37 | 0 | if (name == NULL || namelen == 0) { |
38 | | // Unlike OpenSSL, we reject trying to set or add an empty name. |
39 | 0 | return 0; |
40 | 0 | } |
41 | | |
42 | | // Refuse names with embedded NUL bytes. |
43 | | // XXX: Do we need to push an error onto the error stack? |
44 | 0 | if (name && OPENSSL_memchr(name, '\0', namelen)) { |
45 | 0 | return 0; |
46 | 0 | } |
47 | | |
48 | 0 | if (mode == SET_HOST && param->hosts) { |
49 | 0 | sk_OPENSSL_STRING_pop_free(param->hosts, str_free); |
50 | 0 | param->hosts = NULL; |
51 | 0 | } |
52 | |
|
53 | 0 | copy = OPENSSL_strndup(name, namelen); |
54 | 0 | if (copy == NULL) { |
55 | 0 | return 0; |
56 | 0 | } |
57 | | |
58 | 0 | if (param->hosts == NULL && |
59 | 0 | (param->hosts = sk_OPENSSL_STRING_new_null()) == NULL) { |
60 | 0 | OPENSSL_free(copy); |
61 | 0 | return 0; |
62 | 0 | } |
63 | | |
64 | 0 | if (!sk_OPENSSL_STRING_push(param->hosts, copy)) { |
65 | 0 | OPENSSL_free(copy); |
66 | 0 | if (sk_OPENSSL_STRING_num(param->hosts) == 0) { |
67 | 0 | sk_OPENSSL_STRING_free(param->hosts); |
68 | 0 | param->hosts = NULL; |
69 | 0 | } |
70 | 0 | return 0; |
71 | 0 | } |
72 | | |
73 | 0 | return 1; |
74 | 0 | } |
75 | | |
76 | 139k | X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void) { |
77 | 139k | X509_VERIFY_PARAM *param = reinterpret_cast<X509_VERIFY_PARAM *>( |
78 | 139k | OPENSSL_zalloc(sizeof(X509_VERIFY_PARAM))); |
79 | 139k | if (!param) { |
80 | 0 | return NULL; |
81 | 0 | } |
82 | 139k | param->depth = -1; |
83 | 139k | return param; |
84 | 139k | } |
85 | | |
86 | 147k | void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param) { |
87 | 147k | if (param == NULL) { |
88 | 8.62k | return; |
89 | 8.62k | } |
90 | 139k | sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); |
91 | 139k | sk_OPENSSL_STRING_pop_free(param->hosts, str_free); |
92 | 139k | OPENSSL_free(param->email); |
93 | 139k | OPENSSL_free(param->ip); |
94 | 139k | OPENSSL_free(param); |
95 | 139k | } |
96 | | |
97 | 1.08M | static int should_copy(int dest_is_set, int src_is_set, int prefer_src) { |
98 | 1.08M | if (prefer_src) { |
99 | | // We prefer the source, so as long as there is a value to copy, copy it. |
100 | 60.4k | return src_is_set; |
101 | 60.4k | } |
102 | | |
103 | | // We prefer the destination, so only copy if the destination is unset. |
104 | 1.02M | return src_is_set && !dest_is_set; |
105 | 1.08M | } |
106 | | |
107 | | static void copy_int_param(int *dest, const int *src, int default_val, |
108 | 465k | int prefer_src) { |
109 | 465k | if (should_copy(*dest != default_val, *src != default_val, prefer_src)) { |
110 | 25.8k | *dest = *src; |
111 | 25.8k | } |
112 | 465k | } |
113 | | |
114 | | // x509_verify_param_copy copies fields from |src| to |dest|. If both |src| and |
115 | | // |dest| have some field set, |prefer_src| determines whether |src| or |dest|'s |
116 | | // version is used. |
117 | | static int x509_verify_param_copy(X509_VERIFY_PARAM *dest, |
118 | | const X509_VERIFY_PARAM *src, |
119 | 155k | int prefer_src) { |
120 | 155k | if (src == NULL) { |
121 | 0 | return 1; |
122 | 0 | } |
123 | | |
124 | 155k | copy_int_param(&dest->purpose, &src->purpose, /*default_val=*/0, prefer_src); |
125 | 155k | copy_int_param(&dest->trust, &src->trust, /*default_val=*/0, prefer_src); |
126 | 155k | copy_int_param(&dest->depth, &src->depth, /*default_val=*/-1, prefer_src); |
127 | | |
128 | | // |check_time|, unlike all other parameters, does not honor |prefer_src|. |
129 | | // This means |X509_VERIFY_PARAM_set1| will not overwrite it. This behavior |
130 | | // comes from OpenSSL but may have been a bug. |
131 | 155k | if (!(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) { |
132 | 155k | dest->check_time = src->check_time; |
133 | | // The source |X509_V_FLAG_USE_CHECK_TIME| flag, if set, is copied below. |
134 | 155k | } |
135 | | |
136 | 155k | dest->flags |= src->flags; |
137 | | |
138 | 155k | if (should_copy(dest->policies != NULL, src->policies != NULL, prefer_src)) { |
139 | 0 | if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies)) { |
140 | 0 | return 0; |
141 | 0 | } |
142 | 0 | } |
143 | | |
144 | 155k | if (should_copy(dest->hosts != NULL, src->hosts != NULL, prefer_src)) { |
145 | 0 | sk_OPENSSL_STRING_pop_free(dest->hosts, str_free); |
146 | 0 | dest->hosts = NULL; |
147 | 0 | if (src->hosts) { |
148 | 0 | dest->hosts = |
149 | 0 | sk_OPENSSL_STRING_deep_copy(src->hosts, OPENSSL_strdup, str_free); |
150 | 0 | if (dest->hosts == NULL) { |
151 | 0 | return 0; |
152 | 0 | } |
153 | | // Copy the host flags if and only if we're copying the host list. Note |
154 | | // this means mechanisms like |X509_STORE_CTX_set_default| cannot be used |
155 | | // to set host flags. E.g. we cannot change the defaults using |
156 | | // |kDefaultParam| below. |
157 | 0 | dest->hostflags = src->hostflags; |
158 | 0 | } |
159 | 0 | } |
160 | | |
161 | 155k | if (should_copy(dest->email != NULL, src->email != NULL, prefer_src)) { |
162 | 0 | if (!X509_VERIFY_PARAM_set1_email(dest, src->email, src->emaillen)) { |
163 | 0 | return 0; |
164 | 0 | } |
165 | 0 | } |
166 | | |
167 | 155k | if (should_copy(dest->ip != NULL, src->ip != NULL, prefer_src)) { |
168 | 0 | if (!X509_VERIFY_PARAM_set1_ip(dest, src->ip, src->iplen)) { |
169 | 0 | return 0; |
170 | 0 | } |
171 | 0 | } |
172 | | |
173 | 155k | dest->poison = src->poison; |
174 | 155k | return 1; |
175 | 155k | } |
176 | | |
177 | | int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, |
178 | 146k | const X509_VERIFY_PARAM *src) { |
179 | | // Prefer the destination. That is, this function only changes unset |
180 | | // parameters in |dest|. |
181 | 146k | return x509_verify_param_copy(dest, src, /*prefer_src=*/0); |
182 | 146k | } |
183 | | |
184 | | int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, |
185 | 8.62k | const X509_VERIFY_PARAM *from) { |
186 | | // Prefer the source. That is, values in |to| are only preserved if they were |
187 | | // unset in |from|. |
188 | 8.62k | return x509_verify_param_copy(to, from, /*prefer_src=*/1); |
189 | 8.62k | } |
190 | | |
191 | | static int int_x509_param_set1(char **pdest, size_t *pdestlen, const char *src, |
192 | 0 | size_t srclen) { |
193 | 0 | void *tmp; |
194 | 0 | if (src == NULL || srclen == 0) { |
195 | | // Unlike OpenSSL, we do not allow an empty string to disable previously |
196 | | // configured checks. |
197 | 0 | return 0; |
198 | 0 | } |
199 | | |
200 | 0 | tmp = OPENSSL_memdup(src, srclen); |
201 | 0 | if (!tmp) { |
202 | 0 | return 0; |
203 | 0 | } |
204 | | |
205 | 0 | if (*pdest) { |
206 | 0 | OPENSSL_free(*pdest); |
207 | 0 | } |
208 | 0 | *pdest = reinterpret_cast<char *>(tmp); |
209 | 0 | if (pdestlen) { |
210 | 0 | *pdestlen = srclen; |
211 | 0 | } |
212 | 0 | return 1; |
213 | 0 | } |
214 | | |
215 | 0 | int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) { |
216 | 0 | param->flags |= flags; |
217 | 0 | return 1; |
218 | 0 | } |
219 | | |
220 | | int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, |
221 | 0 | unsigned long flags) { |
222 | 0 | param->flags &= ~flags; |
223 | 0 | return 1; |
224 | 0 | } |
225 | | |
226 | 0 | unsigned long X509_VERIFY_PARAM_get_flags(const X509_VERIFY_PARAM *param) { |
227 | 0 | return param->flags; |
228 | 0 | } |
229 | | |
230 | 0 | int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) { |
231 | 0 | if (X509_PURPOSE_get0(purpose) == NULL) { |
232 | 0 | OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_PURPOSE); |
233 | 0 | return 0; |
234 | 0 | } |
235 | 0 | param->purpose = purpose; |
236 | 0 | return 1; |
237 | 0 | } |
238 | | |
239 | 0 | int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) { |
240 | 0 | if (!X509_is_valid_trust_id(trust)) { |
241 | 0 | OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_TRUST_ID); |
242 | 0 | return 0; |
243 | 0 | } |
244 | | |
245 | 0 | param->trust = trust; |
246 | 0 | return 1; |
247 | 0 | } |
248 | | |
249 | 0 | void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) { |
250 | 0 | param->depth = depth; |
251 | 0 | } |
252 | | |
253 | 0 | void X509_VERIFY_PARAM_set_time_posix(X509_VERIFY_PARAM *param, int64_t t) { |
254 | 0 | param->check_time = t; |
255 | 0 | param->flags |= X509_V_FLAG_USE_CHECK_TIME; |
256 | 0 | } |
257 | | |
258 | 0 | void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) { |
259 | 0 | X509_VERIFY_PARAM_set_time_posix(param, t); |
260 | 0 | } |
261 | | |
262 | | int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, |
263 | 0 | ASN1_OBJECT *policy) { |
264 | 0 | if (!param->policies) { |
265 | 0 | param->policies = sk_ASN1_OBJECT_new_null(); |
266 | 0 | if (!param->policies) { |
267 | 0 | return 0; |
268 | 0 | } |
269 | 0 | } |
270 | 0 | if (!sk_ASN1_OBJECT_push(param->policies, policy)) { |
271 | 0 | return 0; |
272 | 0 | } |
273 | 0 | return 1; |
274 | 0 | } |
275 | | |
276 | | int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, |
277 | 0 | const STACK_OF(ASN1_OBJECT) *policies) { |
278 | 0 | if (!param) { |
279 | 0 | return 0; |
280 | 0 | } |
281 | | |
282 | 0 | sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); |
283 | 0 | if (!policies) { |
284 | 0 | param->policies = NULL; |
285 | 0 | return 1; |
286 | 0 | } |
287 | | |
288 | 0 | param->policies = |
289 | 0 | sk_ASN1_OBJECT_deep_copy(policies, OBJ_dup, ASN1_OBJECT_free); |
290 | 0 | if (!param->policies) { |
291 | 0 | return 0; |
292 | 0 | } |
293 | | |
294 | 0 | return 1; |
295 | 0 | } |
296 | | |
297 | | int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param, const char *name, |
298 | 0 | size_t namelen) { |
299 | 0 | if (!int_x509_param_set_hosts(param, SET_HOST, name, namelen)) { |
300 | 0 | param->poison = 1; |
301 | 0 | return 0; |
302 | 0 | } |
303 | 0 | return 1; |
304 | 0 | } |
305 | | |
306 | | int X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param, const char *name, |
307 | 0 | size_t namelen) { |
308 | 0 | if (!int_x509_param_set_hosts(param, ADD_HOST, name, namelen)) { |
309 | 0 | param->poison = 1; |
310 | 0 | return 0; |
311 | 0 | } |
312 | 0 | return 1; |
313 | 0 | } |
314 | | |
315 | | void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param, |
316 | 0 | unsigned int flags) { |
317 | 0 | param->hostflags = flags; |
318 | 0 | } |
319 | | |
320 | | int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param, const char *email, |
321 | 0 | size_t emaillen) { |
322 | 0 | if (OPENSSL_memchr(email, '\0', emaillen) != NULL || |
323 | 0 | !int_x509_param_set1(¶m->email, ¶m->emaillen, email, emaillen)) { |
324 | 0 | param->poison = 1; |
325 | 0 | return 0; |
326 | 0 | } |
327 | | |
328 | 0 | return 1; |
329 | 0 | } |
330 | | |
331 | | int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param, const unsigned char *ip, |
332 | 0 | size_t iplen) { |
333 | 0 | if ((iplen != 4 && iplen != 16) || |
334 | 0 | !int_x509_param_set1((char **)¶m->ip, ¶m->iplen, (char *)ip, |
335 | 0 | iplen)) { |
336 | 0 | param->poison = 1; |
337 | 0 | return 0; |
338 | 0 | } |
339 | | |
340 | 0 | return 1; |
341 | 0 | } |
342 | | |
343 | 0 | int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc) { |
344 | 0 | unsigned char ipout[16]; |
345 | 0 | size_t iplen; |
346 | |
|
347 | 0 | iplen = (size_t)x509v3_a2i_ipadd(ipout, ipasc); |
348 | 0 | if (iplen == 0) { |
349 | 0 | return 0; |
350 | 0 | } |
351 | 0 | return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen); |
352 | 0 | } |
353 | | |
354 | 0 | int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param) { |
355 | 0 | return param->depth; |
356 | 0 | } |
357 | | |
358 | | static const X509_VERIFY_PARAM kDefaultParam = { |
359 | | /*check_time=*/0, |
360 | | /*flags=*/X509_V_FLAG_TRUSTED_FIRST, |
361 | | /*purpose=*/0, |
362 | | /*trust=*/0, |
363 | | /*depth=*/100, |
364 | | /*policies=*/nullptr, |
365 | | /*hosts=*/nullptr, |
366 | | /*hostflags=*/0, |
367 | | /*email=*/nullptr, |
368 | | /*emaillen=*/0, |
369 | | /*ip=*/nullptr, |
370 | | /*iplen=*/0, |
371 | | /*poison=*/0, |
372 | | }; |
373 | | |
374 | | static const X509_VERIFY_PARAM kSMIMESignParam = { |
375 | | /*check_time=*/0, |
376 | | /*flags=*/0, |
377 | | /*purpose=*/X509_PURPOSE_SMIME_SIGN, |
378 | | /*trust=*/X509_TRUST_EMAIL, |
379 | | /*depth=*/-1, |
380 | | /*policies=*/nullptr, |
381 | | /*hosts=*/nullptr, |
382 | | /*hostflags=*/0, |
383 | | /*email=*/nullptr, |
384 | | /*emaillen=*/0, |
385 | | /*ip=*/nullptr, |
386 | | /*iplen=*/0, |
387 | | /*poison=*/0, |
388 | | }; |
389 | | |
390 | | static const X509_VERIFY_PARAM kSSLClientParam = { |
391 | | /*check_time=*/0, |
392 | | /*flags=*/0, |
393 | | /*purpose=*/X509_PURPOSE_SSL_CLIENT, |
394 | | /*trust=*/X509_TRUST_SSL_CLIENT, |
395 | | /*depth=*/-1, |
396 | | /*policies=*/nullptr, |
397 | | /*hosts=*/nullptr, |
398 | | /*hostflags=*/0, |
399 | | /*email=*/nullptr, |
400 | | /*emaillen=*/0, |
401 | | /*ip=*/nullptr, |
402 | | /*iplen=*/0, |
403 | | /*poison=*/0, |
404 | | }; |
405 | | |
406 | | static const X509_VERIFY_PARAM kSSLServerParam = { |
407 | | /*check_time=*/0, |
408 | | /*flags=*/0, |
409 | | /*purpose=*/X509_PURPOSE_SSL_SERVER, |
410 | | /*trust=*/X509_TRUST_SSL_SERVER, |
411 | | /*depth=*/-1, |
412 | | /*policies=*/nullptr, |
413 | | /*hosts=*/nullptr, |
414 | | /*hostflags=*/0, |
415 | | /*email=*/nullptr, |
416 | | /*emaillen=*/0, |
417 | | /*ip=*/nullptr, |
418 | | /*iplen=*/0, |
419 | | /*poison=*/0, |
420 | | }; |
421 | | |
422 | 17.2k | const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) { |
423 | 17.2k | if (strcmp(name, "default") == 0) { |
424 | 8.62k | return &kDefaultParam; |
425 | 8.62k | } |
426 | 8.62k | if (strcmp(name, "pkcs7") == 0) { |
427 | | // PKCS#7 and S/MIME signing use the same defaults. |
428 | 0 | return &kSMIMESignParam; |
429 | 0 | } |
430 | 8.62k | if (strcmp(name, "smime_sign") == 0) { |
431 | 0 | return &kSMIMESignParam; |
432 | 0 | } |
433 | 8.62k | if (strcmp(name, "ssl_client") == 0) { |
434 | 2.32k | return &kSSLClientParam; |
435 | 2.32k | } |
436 | 6.30k | if (strcmp(name, "ssl_server") == 0) { |
437 | 6.30k | return &kSSLServerParam; |
438 | 6.30k | } |
439 | 0 | return NULL; |
440 | 6.30k | } |