1 | /*
|
---|
2 | * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
|
---|
3 | *
|
---|
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
|
---|
5 | * this file except in compliance with the License. You can obtain a copy
|
---|
6 | * in the file LICENSE in the source distribution or at
|
---|
7 | * https://www.openssl.org/source/license.html
|
---|
8 | */
|
---|
9 |
|
---|
10 | #include <stdio.h>
|
---|
11 | #include "internal/cryptlib.h"
|
---|
12 | #include <openssl/evp.h>
|
---|
13 | #include <openssl/asn1t.h>
|
---|
14 | #include <openssl/x509.h>
|
---|
15 | #include <openssl/x509v3.h>
|
---|
16 | #include "crypto/x509.h"
|
---|
17 |
|
---|
18 | ASN1_SEQUENCE_enc(X509_CINF, enc, 0) = {
|
---|
19 | ASN1_EXP_OPT(X509_CINF, version, ASN1_INTEGER, 0),
|
---|
20 | ASN1_EMBED(X509_CINF, serialNumber, ASN1_INTEGER),
|
---|
21 | ASN1_EMBED(X509_CINF, signature, X509_ALGOR),
|
---|
22 | ASN1_SIMPLE(X509_CINF, issuer, X509_NAME),
|
---|
23 | ASN1_EMBED(X509_CINF, validity, X509_VAL),
|
---|
24 | ASN1_SIMPLE(X509_CINF, subject, X509_NAME),
|
---|
25 | ASN1_SIMPLE(X509_CINF, key, X509_PUBKEY),
|
---|
26 | ASN1_IMP_OPT(X509_CINF, issuerUID, ASN1_BIT_STRING, 1),
|
---|
27 | ASN1_IMP_OPT(X509_CINF, subjectUID, ASN1_BIT_STRING, 2),
|
---|
28 | ASN1_EXP_SEQUENCE_OF_OPT(X509_CINF, extensions, X509_EXTENSION, 3)
|
---|
29 | } ASN1_SEQUENCE_END_enc(X509_CINF, X509_CINF)
|
---|
30 |
|
---|
31 | IMPLEMENT_ASN1_FUNCTIONS(X509_CINF)
|
---|
32 | /* X509 top level structure needs a bit of customisation */
|
---|
33 |
|
---|
34 | extern void ossl_policy_cache_free(X509_POLICY_CACHE *cache);
|
---|
35 |
|
---|
36 | static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
|
---|
37 | void *exarg)
|
---|
38 | {
|
---|
39 | X509 *ret = (X509 *)*pval;
|
---|
40 |
|
---|
41 | switch (operation) {
|
---|
42 |
|
---|
43 | case ASN1_OP_D2I_PRE:
|
---|
44 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
|
---|
45 | X509_CERT_AUX_free(ret->aux);
|
---|
46 | ASN1_OCTET_STRING_free(ret->skid);
|
---|
47 | AUTHORITY_KEYID_free(ret->akid);
|
---|
48 | CRL_DIST_POINTS_free(ret->crldp);
|
---|
49 | ossl_policy_cache_free(ret->policy_cache);
|
---|
50 | GENERAL_NAMES_free(ret->altname);
|
---|
51 | NAME_CONSTRAINTS_free(ret->nc);
|
---|
52 | #ifndef OPENSSL_NO_RFC3779
|
---|
53 | sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
|
---|
54 | ASIdentifiers_free(ret->rfc3779_asid);
|
---|
55 | #endif
|
---|
56 | ASN1_OCTET_STRING_free(ret->distinguishing_id);
|
---|
57 |
|
---|
58 | /* fall through */
|
---|
59 |
|
---|
60 | case ASN1_OP_NEW_POST:
|
---|
61 | ret->ex_cached = 0;
|
---|
62 | ret->ex_kusage = 0;
|
---|
63 | ret->ex_xkusage = 0;
|
---|
64 | ret->ex_nscert = 0;
|
---|
65 | ret->ex_flags = 0;
|
---|
66 | ret->ex_pathlen = -1;
|
---|
67 | ret->ex_pcpathlen = -1;
|
---|
68 | ret->skid = NULL;
|
---|
69 | ret->akid = NULL;
|
---|
70 | ret->policy_cache = NULL;
|
---|
71 | ret->altname = NULL;
|
---|
72 | ret->nc = NULL;
|
---|
73 | #ifndef OPENSSL_NO_RFC3779
|
---|
74 | ret->rfc3779_addr = NULL;
|
---|
75 | ret->rfc3779_asid = NULL;
|
---|
76 | #endif
|
---|
77 | ret->distinguishing_id = NULL;
|
---|
78 | ret->aux = NULL;
|
---|
79 | ret->crldp = NULL;
|
---|
80 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data))
|
---|
81 | return 0;
|
---|
82 | break;
|
---|
83 |
|
---|
84 | case ASN1_OP_FREE_POST:
|
---|
85 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
|
---|
86 | X509_CERT_AUX_free(ret->aux);
|
---|
87 | ASN1_OCTET_STRING_free(ret->skid);
|
---|
88 | AUTHORITY_KEYID_free(ret->akid);
|
---|
89 | CRL_DIST_POINTS_free(ret->crldp);
|
---|
90 | ossl_policy_cache_free(ret->policy_cache);
|
---|
91 | GENERAL_NAMES_free(ret->altname);
|
---|
92 | NAME_CONSTRAINTS_free(ret->nc);
|
---|
93 | #ifndef OPENSSL_NO_RFC3779
|
---|
94 | sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
|
---|
95 | ASIdentifiers_free(ret->rfc3779_asid);
|
---|
96 | #endif
|
---|
97 | ASN1_OCTET_STRING_free(ret->distinguishing_id);
|
---|
98 | OPENSSL_free(ret->propq);
|
---|
99 | break;
|
---|
100 |
|
---|
101 | case ASN1_OP_DUP_POST:
|
---|
102 | {
|
---|
103 | X509 *old = exarg;
|
---|
104 |
|
---|
105 | if (!ossl_x509_set0_libctx(ret, old->libctx, old->propq))
|
---|
106 | return 0;
|
---|
107 | }
|
---|
108 | break;
|
---|
109 | case ASN1_OP_GET0_LIBCTX:
|
---|
110 | {
|
---|
111 | OSSL_LIB_CTX **libctx = exarg;
|
---|
112 |
|
---|
113 | *libctx = ret->libctx;
|
---|
114 | }
|
---|
115 | break;
|
---|
116 |
|
---|
117 | case ASN1_OP_GET0_PROPQ:
|
---|
118 | {
|
---|
119 | const char **propq = exarg;
|
---|
120 |
|
---|
121 | *propq = ret->propq;
|
---|
122 | }
|
---|
123 | break;
|
---|
124 |
|
---|
125 | default:
|
---|
126 | break;
|
---|
127 | }
|
---|
128 |
|
---|
129 | return 1;
|
---|
130 | }
|
---|
131 |
|
---|
132 | ASN1_SEQUENCE_ref(X509, x509_cb) = {
|
---|
133 | ASN1_EMBED(X509, cert_info, X509_CINF),
|
---|
134 | ASN1_EMBED(X509, sig_alg, X509_ALGOR),
|
---|
135 | ASN1_EMBED(X509, signature, ASN1_BIT_STRING)
|
---|
136 | } ASN1_SEQUENCE_END_ref(X509, X509)
|
---|
137 |
|
---|
138 | IMPLEMENT_ASN1_FUNCTIONS(X509)
|
---|
139 | IMPLEMENT_ASN1_DUP_FUNCTION(X509)
|
---|
140 |
|
---|
141 | /*
|
---|
142 | * This should only be used if the X509 object was embedded inside another
|
---|
143 | * asn1 object and it needs a libctx to operate.
|
---|
144 | * Use X509_new_ex() instead if possible.
|
---|
145 | */
|
---|
146 | int ossl_x509_set0_libctx(X509 *x, OSSL_LIB_CTX *libctx, const char *propq)
|
---|
147 | {
|
---|
148 | if (x != NULL) {
|
---|
149 | x->libctx = libctx;
|
---|
150 | OPENSSL_free(x->propq);
|
---|
151 | x->propq = NULL;
|
---|
152 | if (propq != NULL) {
|
---|
153 | x->propq = OPENSSL_strdup(propq);
|
---|
154 | if (x->propq == NULL)
|
---|
155 | return 0;
|
---|
156 | }
|
---|
157 | }
|
---|
158 | return 1;
|
---|
159 | }
|
---|
160 |
|
---|
161 | X509 *X509_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
|
---|
162 | {
|
---|
163 | X509 *cert = NULL;
|
---|
164 |
|
---|
165 | cert = (X509 *)ASN1_item_new_ex(X509_it(), libctx, propq);
|
---|
166 | if (!ossl_x509_set0_libctx(cert, libctx, propq)) {
|
---|
167 | X509_free(cert);
|
---|
168 | cert = NULL;
|
---|
169 | }
|
---|
170 | return cert;
|
---|
171 | }
|
---|
172 |
|
---|
173 | int X509_set_ex_data(X509 *r, int idx, void *arg)
|
---|
174 | {
|
---|
175 | return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
|
---|
176 | }
|
---|
177 |
|
---|
178 | void *X509_get_ex_data(const X509 *r, int idx)
|
---|
179 | {
|
---|
180 | return CRYPTO_get_ex_data(&r->ex_data, idx);
|
---|
181 | }
|
---|
182 |
|
---|
183 | /*
|
---|
184 | * X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with
|
---|
185 | * extra info tagged on the end. Since these functions set how a certificate
|
---|
186 | * is trusted they should only be used when the certificate comes from a
|
---|
187 | * reliable source such as local storage.
|
---|
188 | */
|
---|
189 |
|
---|
190 | X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
|
---|
191 | {
|
---|
192 | const unsigned char *q;
|
---|
193 | X509 *ret;
|
---|
194 | int freeret = 0;
|
---|
195 |
|
---|
196 | /* Save start position */
|
---|
197 | q = *pp;
|
---|
198 |
|
---|
199 | if (a == NULL || *a == NULL)
|
---|
200 | freeret = 1;
|
---|
201 | ret = d2i_X509(a, &q, length);
|
---|
202 | /* If certificate unreadable then forget it */
|
---|
203 | if (ret == NULL)
|
---|
204 | return NULL;
|
---|
205 | /* update length */
|
---|
206 | length -= q - *pp;
|
---|
207 | if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length))
|
---|
208 | goto err;
|
---|
209 | *pp = q;
|
---|
210 | return ret;
|
---|
211 | err:
|
---|
212 | if (freeret) {
|
---|
213 | X509_free(ret);
|
---|
214 | if (a)
|
---|
215 | *a = NULL;
|
---|
216 | }
|
---|
217 | return NULL;
|
---|
218 | }
|
---|
219 |
|
---|
220 | /*
|
---|
221 | * Serialize trusted certificate to *pp or just return the required buffer
|
---|
222 | * length if pp == NULL. We ultimately want to avoid modifying *pp in the
|
---|
223 | * error path, but that depends on similar hygiene in lower-level functions.
|
---|
224 | * Here we avoid compounding the problem.
|
---|
225 | */
|
---|
226 | static int i2d_x509_aux_internal(const X509 *a, unsigned char **pp)
|
---|
227 | {
|
---|
228 | int length, tmplen;
|
---|
229 | unsigned char *start = pp != NULL ? *pp : NULL;
|
---|
230 |
|
---|
231 | /*
|
---|
232 | * This might perturb *pp on error, but fixing that belongs in i2d_X509()
|
---|
233 | * not here. It should be that if a == NULL length is zero, but we check
|
---|
234 | * both just in case.
|
---|
235 | */
|
---|
236 | length = i2d_X509(a, pp);
|
---|
237 | if (length <= 0 || a == NULL)
|
---|
238 | return length;
|
---|
239 |
|
---|
240 | tmplen = i2d_X509_CERT_AUX(a->aux, pp);
|
---|
241 | if (tmplen < 0) {
|
---|
242 | if (start != NULL)
|
---|
243 | *pp = start;
|
---|
244 | return tmplen;
|
---|
245 | }
|
---|
246 | length += tmplen;
|
---|
247 |
|
---|
248 | return length;
|
---|
249 | }
|
---|
250 |
|
---|
251 | /*
|
---|
252 | * Serialize trusted certificate to *pp, or just return the required buffer
|
---|
253 | * length if pp == NULL.
|
---|
254 | *
|
---|
255 | * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since
|
---|
256 | * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do
|
---|
257 | * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the
|
---|
258 | * allocated buffer.
|
---|
259 | */
|
---|
260 | int i2d_X509_AUX(const X509 *a, unsigned char **pp)
|
---|
261 | {
|
---|
262 | int length;
|
---|
263 | unsigned char *tmp;
|
---|
264 |
|
---|
265 | /* Buffer provided by caller */
|
---|
266 | if (pp == NULL || *pp != NULL)
|
---|
267 | return i2d_x509_aux_internal(a, pp);
|
---|
268 |
|
---|
269 | /* Obtain the combined length */
|
---|
270 | if ((length = i2d_x509_aux_internal(a, NULL)) <= 0)
|
---|
271 | return length;
|
---|
272 |
|
---|
273 | /* Allocate requisite combined storage */
|
---|
274 | *pp = tmp = OPENSSL_malloc(length);
|
---|
275 | if (tmp == NULL) {
|
---|
276 | ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
|
---|
277 | return -1;
|
---|
278 | }
|
---|
279 |
|
---|
280 | /* Encode, but keep *pp at the originally malloced pointer */
|
---|
281 | length = i2d_x509_aux_internal(a, &tmp);
|
---|
282 | if (length <= 0) {
|
---|
283 | OPENSSL_free(*pp);
|
---|
284 | *pp = NULL;
|
---|
285 | }
|
---|
286 | return length;
|
---|
287 | }
|
---|
288 |
|
---|
289 | int i2d_re_X509_tbs(X509 *x, unsigned char **pp)
|
---|
290 | {
|
---|
291 | x->cert_info.enc.modified = 1;
|
---|
292 | return i2d_X509_CINF(&x->cert_info, pp);
|
---|
293 | }
|
---|
294 |
|
---|
295 | void X509_get0_signature(const ASN1_BIT_STRING **psig,
|
---|
296 | const X509_ALGOR **palg, const X509 *x)
|
---|
297 | {
|
---|
298 | if (psig)
|
---|
299 | *psig = &x->signature;
|
---|
300 | if (palg)
|
---|
301 | *palg = &x->sig_alg;
|
---|
302 | }
|
---|
303 |
|
---|
304 | int X509_get_signature_nid(const X509 *x)
|
---|
305 | {
|
---|
306 | return OBJ_obj2nid(x->sig_alg.algorithm);
|
---|
307 | }
|
---|
308 |
|
---|
309 | void X509_set0_distinguishing_id(X509 *x, ASN1_OCTET_STRING *d_id)
|
---|
310 | {
|
---|
311 | ASN1_OCTET_STRING_free(x->distinguishing_id);
|
---|
312 | x->distinguishing_id = d_id;
|
---|
313 | }
|
---|
314 |
|
---|
315 | ASN1_OCTET_STRING *X509_get0_distinguishing_id(X509 *x)
|
---|
316 | {
|
---|
317 | return x->distinguishing_id;
|
---|
318 | }
|
---|