1 /* $OpenBSD: x_x509.c,v 1.30 2021/12/25 13:17:48 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60
61 #include <openssl/opensslconf.h>
62
63 #include <openssl/asn1t.h>
64 #include <openssl/evp.h>
65 #include <openssl/x509.h>
66 #include <openssl/x509v3.h>
67
68 #include "x509_lcl.h"
69
70 static const ASN1_AUX X509_CINF_aux = {
71 .flags = ASN1_AFLG_ENCODING,
72 .enc_offset = offsetof(X509_CINF, enc),
73 };
74 static const ASN1_TEMPLATE X509_CINF_seq_tt[] = {
75 {
76 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,
77 .offset = offsetof(X509_CINF, version),
78 .field_name = "version",
79 .item = &ASN1_INTEGER_it,
80 },
81 {
82 .offset = offsetof(X509_CINF, serialNumber),
83 .field_name = "serialNumber",
84 .item = &ASN1_INTEGER_it,
85 },
86 {
87 .offset = offsetof(X509_CINF, signature),
88 .field_name = "signature",
89 .item = &X509_ALGOR_it,
90 },
91 {
92 .offset = offsetof(X509_CINF, issuer),
93 .field_name = "issuer",
94 .item = &X509_NAME_it,
95 },
96 {
97 .offset = offsetof(X509_CINF, validity),
98 .field_name = "validity",
99 .item = &X509_VAL_it,
100 },
101 {
102 .offset = offsetof(X509_CINF, subject),
103 .field_name = "subject",
104 .item = &X509_NAME_it,
105 },
106 {
107 .offset = offsetof(X509_CINF, key),
108 .field_name = "key",
109 .item = &X509_PUBKEY_it,
110 },
111 {
112 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
113 .tag = 1,
114 .offset = offsetof(X509_CINF, issuerUID),
115 .field_name = "issuerUID",
116 .item = &ASN1_BIT_STRING_it,
117 },
118 {
119 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
120 .tag = 2,
121 .offset = offsetof(X509_CINF, subjectUID),
122 .field_name = "subjectUID",
123 .item = &ASN1_BIT_STRING_it,
124 },
125 {
126 .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_SEQUENCE_OF |
127 ASN1_TFLG_OPTIONAL,
128 .tag = 3,
129 .offset = offsetof(X509_CINF, extensions),
130 .field_name = "extensions",
131 .item = &X509_EXTENSION_it,
132 },
133 };
134
135 const ASN1_ITEM X509_CINF_it = {
136 .itype = ASN1_ITYPE_SEQUENCE,
137 .utype = V_ASN1_SEQUENCE,
138 .templates = X509_CINF_seq_tt,
139 .tcount = sizeof(X509_CINF_seq_tt) / sizeof(ASN1_TEMPLATE),
140 .funcs = &X509_CINF_aux,
141 .size = sizeof(X509_CINF),
142 .sname = "X509_CINF",
143 };
144
145
146 X509_CINF *
d2i_X509_CINF(X509_CINF ** a,const unsigned char ** in,long len)147 d2i_X509_CINF(X509_CINF **a, const unsigned char **in, long len)
148 {
149 return (X509_CINF *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
150 &X509_CINF_it);
151 }
152
153 int
i2d_X509_CINF(X509_CINF * a,unsigned char ** out)154 i2d_X509_CINF(X509_CINF *a, unsigned char **out)
155 {
156 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_CINF_it);
157 }
158
159 X509_CINF *
X509_CINF_new(void)160 X509_CINF_new(void)
161 {
162 return (X509_CINF *)ASN1_item_new(&X509_CINF_it);
163 }
164
165 void
X509_CINF_free(X509_CINF * a)166 X509_CINF_free(X509_CINF *a)
167 {
168 ASN1_item_free((ASN1_VALUE *)a, &X509_CINF_it);
169 }
170 /* X509 top level structure needs a bit of customisation */
171
172 extern void policy_cache_free(X509_POLICY_CACHE *cache);
173
174 static int
x509_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)175 x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
176 {
177 X509 *ret = (X509 *)*pval;
178
179 switch (operation) {
180
181 case ASN1_OP_NEW_POST:
182 ret->valid = 0;
183 ret->name = NULL;
184 ret->ex_flags = 0;
185 ret->ex_pathlen = -1;
186 ret->skid = NULL;
187 ret->akid = NULL;
188 ret->aux = NULL;
189 ret->crldp = NULL;
190 #ifndef OPENSSL_NO_RFC3779
191 ret->rfc3779_addr = NULL;
192 ret->rfc3779_asid = NULL;
193 #endif
194 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
195 break;
196
197 case ASN1_OP_D2I_POST:
198 free(ret->name);
199 ret->name = X509_NAME_oneline(ret->cert_info->subject, NULL, 0);
200 break;
201
202 case ASN1_OP_FREE_POST:
203 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
204 X509_CERT_AUX_free(ret->aux);
205 ASN1_OCTET_STRING_free(ret->skid);
206 AUTHORITY_KEYID_free(ret->akid);
207 CRL_DIST_POINTS_free(ret->crldp);
208 policy_cache_free(ret->policy_cache);
209 GENERAL_NAMES_free(ret->altname);
210 NAME_CONSTRAINTS_free(ret->nc);
211 #ifndef OPENSSL_NO_RFC3779
212 sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
213 ASIdentifiers_free(ret->rfc3779_asid);
214 #endif
215 free(ret->name);
216 ret->name = NULL;
217 break;
218 }
219
220 return 1;
221 }
222
223 static const ASN1_AUX X509_aux = {
224 .app_data = NULL,
225 .flags = ASN1_AFLG_REFCOUNT,
226 .ref_offset = offsetof(X509, references),
227 .ref_lock = CRYPTO_LOCK_X509,
228 .asn1_cb = x509_cb,
229 };
230 static const ASN1_TEMPLATE X509_seq_tt[] = {
231 {
232 .offset = offsetof(X509, cert_info),
233 .field_name = "cert_info",
234 .item = &X509_CINF_it,
235 },
236 {
237 .offset = offsetof(X509, sig_alg),
238 .field_name = "sig_alg",
239 .item = &X509_ALGOR_it,
240 },
241 {
242 .offset = offsetof(X509, signature),
243 .field_name = "signature",
244 .item = &ASN1_BIT_STRING_it,
245 },
246 };
247
248 const ASN1_ITEM X509_it = {
249 .itype = ASN1_ITYPE_SEQUENCE,
250 .utype = V_ASN1_SEQUENCE,
251 .templates = X509_seq_tt,
252 .tcount = sizeof(X509_seq_tt) / sizeof(ASN1_TEMPLATE),
253 .funcs = &X509_aux,
254 .size = sizeof(X509),
255 .sname = "X509",
256 };
257
258
259 X509 *
d2i_X509(X509 ** a,const unsigned char ** in,long len)260 d2i_X509(X509 **a, const unsigned char **in, long len)
261 {
262 return (X509 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
263 &X509_it);
264 }
265
266 int
i2d_X509(X509 * a,unsigned char ** out)267 i2d_X509(X509 *a, unsigned char **out)
268 {
269 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_it);
270 }
271
272 X509 *
X509_new(void)273 X509_new(void)
274 {
275 return (X509 *)ASN1_item_new(&X509_it);
276 }
277
278 void
X509_free(X509 * a)279 X509_free(X509 *a)
280 {
281 ASN1_item_free((ASN1_VALUE *)a, &X509_it);
282 }
283
284 X509 *
X509_dup(X509 * x)285 X509_dup(X509 *x)
286 {
287 return ASN1_item_dup(&X509_it, x);
288 }
289
290 int
X509_get_ex_new_index(long argl,void * argp,CRYPTO_EX_new * new_func,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)291 X509_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
292 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
293 {
294 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509, argl, argp,
295 new_func, dup_func, free_func);
296 }
297
298 int
X509_set_ex_data(X509 * r,int idx,void * arg)299 X509_set_ex_data(X509 *r, int idx, void *arg)
300 {
301 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
302 }
303
304 void *
X509_get_ex_data(X509 * r,int idx)305 X509_get_ex_data(X509 *r, int idx)
306 {
307 return (CRYPTO_get_ex_data(&r->ex_data, idx));
308 }
309
310 /* X509_AUX ASN1 routines. X509_AUX is the name given to
311 * a certificate with extra info tagged on the end. Since these
312 * functions set how a certificate is trusted they should only
313 * be used when the certificate comes from a reliable source
314 * such as local storage.
315 *
316 */
317
318 X509 *
d2i_X509_AUX(X509 ** a,const unsigned char ** pp,long length)319 d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
320 {
321 const unsigned char *q;
322 X509 *ret;
323
324 /* Save start position */
325 q = *pp;
326 ret = d2i_X509(NULL, pp, length);
327 /* If certificate unreadable then forget it */
328 if (!ret)
329 return NULL;
330 /* update length */
331 length -= *pp - q;
332 if (length > 0) {
333 if (!d2i_X509_CERT_AUX(&ret->aux, pp, length))
334 goto err;
335 }
336 if (a != NULL) {
337 X509_free(*a);
338 *a = ret;
339 }
340 return ret;
341
342 err:
343 X509_free(ret);
344 return NULL;
345 }
346
347 int
i2d_X509_AUX(X509 * a,unsigned char ** pp)348 i2d_X509_AUX(X509 *a, unsigned char **pp)
349 {
350 int length;
351
352 length = i2d_X509(a, pp);
353 if (a)
354 length += i2d_X509_CERT_AUX(a->aux, pp);
355 return length;
356 }
357
358 int
i2d_re_X509_tbs(X509 * x,unsigned char ** pp)359 i2d_re_X509_tbs(X509 *x, unsigned char **pp)
360 {
361 x->cert_info->enc.modified = 1;
362 return i2d_X509_CINF(x->cert_info, pp);
363 }
364
365 void
X509_get0_signature(const ASN1_BIT_STRING ** psig,const X509_ALGOR ** palg,const X509 * x)366 X509_get0_signature(const ASN1_BIT_STRING **psig, const X509_ALGOR **palg,
367 const X509 *x)
368 {
369 if (psig != NULL)
370 *psig = x->signature;
371 if (palg != NULL)
372 *palg = x->sig_alg;
373 }
374
375 int
X509_get_signature_nid(const X509 * x)376 X509_get_signature_nid(const X509 *x)
377 {
378 return OBJ_obj2nid(x->sig_alg->algorithm);
379 }
380