]> git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/x509/x509_set.c
8b2d8cc91d7126f636929c7897dbd3ec38133c22
[thirdparty/openssl.git] / crypto / x509 / x509_set.c
1 /*
2 * Copyright 1995-2021 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 "internal/refcount.h"
13 #include <openssl/asn1.h>
14 #include <openssl/objects.h>
15 #include <openssl/evp.h>
16 #include <openssl/x509.h>
17 #include <openssl/x509v3.h>
18 #include "crypto/asn1.h"
19 #include "crypto/x509.h"
20 #include "x509_local.h"
21
22 int X509_set_version(X509 *x, long version)
23 {
24 if (x == NULL)
25 return 0;
26 if (version == 0) {
27 ASN1_INTEGER_free(x->cert_info.version);
28 x->cert_info.version = NULL;
29 return 1;
30 }
31 if (x->cert_info.version == NULL) {
32 if ((x->cert_info.version = ASN1_INTEGER_new()) == NULL)
33 return 0;
34 }
35 return ASN1_INTEGER_set(x->cert_info.version, version);
36 }
37
38 int X509_set_serialNumber(X509 *x, ASN1_INTEGER *serial)
39 {
40 ASN1_INTEGER *in;
41
42 if (x == NULL)
43 return 0;
44 in = &x->cert_info.serialNumber;
45 if (in != serial)
46 return ASN1_STRING_copy(in, serial);
47 return 1;
48 }
49
50 int X509_set_issuer_name(X509 *x, const X509_NAME *name)
51 {
52 if (x == NULL)
53 return 0;
54 return X509_NAME_set(&x->cert_info.issuer, name);
55 }
56
57 int X509_set_subject_name(X509 *x, const X509_NAME *name)
58 {
59 if (x == NULL)
60 return 0;
61 return X509_NAME_set(&x->cert_info.subject, name);
62 }
63
64 int ossl_x509_set1_time(ASN1_TIME **ptm, const ASN1_TIME *tm)
65 {
66 ASN1_TIME *in;
67 in = *ptm;
68 if (in != tm) {
69 in = ASN1_STRING_dup(tm);
70 if (in != NULL) {
71 ASN1_TIME_free(*ptm);
72 *ptm = in;
73 }
74 }
75 return (in != NULL);
76 }
77
78 int X509_set1_notBefore(X509 *x, const ASN1_TIME *tm)
79 {
80 if (x == NULL)
81 return 0;
82 return ossl_x509_set1_time(&x->cert_info.validity.notBefore, tm);
83 }
84
85 int X509_set1_notAfter(X509 *x, const ASN1_TIME *tm)
86 {
87 if (x == NULL)
88 return 0;
89 return ossl_x509_set1_time(&x->cert_info.validity.notAfter, tm);
90 }
91
92 int X509_set_pubkey(X509 *x, EVP_PKEY *pkey)
93 {
94 if (x == NULL)
95 return 0;
96 return X509_PUBKEY_set(&(x->cert_info.key), pkey);
97 }
98
99 int X509_up_ref(X509 *x)
100 {
101 int i;
102
103 if (CRYPTO_UP_REF(&x->references, &i, x->lock) <= 0)
104 return 0;
105
106 REF_PRINT_COUNT("X509", x);
107 REF_ASSERT_ISNT(i < 2);
108 return ((i > 1) ? 1 : 0);
109 }
110
111 long X509_get_version(const X509 *x)
112 {
113 return ASN1_INTEGER_get(x->cert_info.version);
114 }
115
116 const ASN1_TIME *X509_get0_notBefore(const X509 *x)
117 {
118 return x->cert_info.validity.notBefore;
119 }
120
121 const ASN1_TIME *X509_get0_notAfter(const X509 *x)
122 {
123 return x->cert_info.validity.notAfter;
124 }
125
126 ASN1_TIME *X509_getm_notBefore(const X509 *x)
127 {
128 return x->cert_info.validity.notBefore;
129 }
130
131 ASN1_TIME *X509_getm_notAfter(const X509 *x)
132 {
133 return x->cert_info.validity.notAfter;
134 }
135
136 int X509_get_signature_type(const X509 *x)
137 {
138 return EVP_PKEY_type(OBJ_obj2nid(x->sig_alg.algorithm));
139 }
140
141 X509_PUBKEY *X509_get_X509_PUBKEY(const X509 *x)
142 {
143 return x->cert_info.key;
144 }
145
146 const STACK_OF(X509_EXTENSION) *X509_get0_extensions(const X509 *x)
147 {
148 return x->cert_info.extensions;
149 }
150
151 void X509_get0_uids(const X509 *x, const ASN1_BIT_STRING **piuid,
152 const ASN1_BIT_STRING **psuid)
153 {
154 if (piuid != NULL)
155 *piuid = x->cert_info.issuerUID;
156 if (psuid != NULL)
157 *psuid = x->cert_info.subjectUID;
158 }
159
160 const X509_ALGOR *X509_get0_tbs_sigalg(const X509 *x)
161 {
162 return &x->cert_info.signature;
163 }
164
165 int X509_SIG_INFO_get(const X509_SIG_INFO *siginf, int *mdnid, int *pknid,
166 int *secbits, uint32_t *flags)
167 {
168 if (mdnid != NULL)
169 *mdnid = siginf->mdnid;
170 if (pknid != NULL)
171 *pknid = siginf->pknid;
172 if (secbits != NULL)
173 *secbits = siginf->secbits;
174 if (flags != NULL)
175 *flags = siginf->flags;
176 return (siginf->flags & X509_SIG_INFO_VALID) != 0;
177 }
178
179 void X509_SIG_INFO_set(X509_SIG_INFO *siginf, int mdnid, int pknid,
180 int secbits, uint32_t flags)
181 {
182 siginf->mdnid = mdnid;
183 siginf->pknid = pknid;
184 siginf->secbits = secbits;
185 siginf->flags = flags;
186 }
187
188 int X509_get_signature_info(X509 *x, int *mdnid, int *pknid, int *secbits,
189 uint32_t *flags)
190 {
191 X509_check_purpose(x, -1, -1);
192 return X509_SIG_INFO_get(&x->siginf, mdnid, pknid, secbits, flags);
193 }
194
195 /* Modify *siginf according to alg and sig. Return 1 on success, else 0. */
196 static int x509_sig_info_init(X509_SIG_INFO *siginf, const X509_ALGOR *alg,
197 const ASN1_STRING *sig)
198 {
199 int pknid, mdnid;
200 const EVP_MD *md;
201 const EVP_PKEY_ASN1_METHOD *ameth;
202
203 siginf->mdnid = NID_undef;
204 siginf->pknid = NID_undef;
205 siginf->secbits = -1;
206 siginf->flags = 0;
207 if (!OBJ_find_sigid_algs(OBJ_obj2nid(alg->algorithm), &mdnid, &pknid)
208 || pknid == NID_undef) {
209 ERR_raise(ERR_LIB_X509, X509_R_UNKNOWN_SIGID_ALGS);
210 return 0;
211 }
212 siginf->mdnid = mdnid;
213 siginf->pknid = pknid;
214
215 switch (mdnid) {
216 case NID_undef:
217 /* If we have one, use a custom handler for this algorithm */
218 ameth = EVP_PKEY_asn1_find(NULL, pknid);
219 if (ameth == NULL || ameth->siginf_set == NULL
220 || !ameth->siginf_set(siginf, alg, sig)) {
221 ERR_raise(ERR_LIB_X509, X509_R_ERROR_USING_SIGINF_SET);
222 return 0;
223 }
224 break;
225 /*
226 * SHA1 and MD5 are known to be broken. Reduce security bits so that
227 * they're no longer accepted at security level 1.
228 * The real values don't really matter as long as they're lower than 80,
229 * which is our security level 1.
230 */
231 case NID_sha1:
232 /*
233 * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack
234 * for SHA1 at2^63.4
235 */
236 siginf->secbits = 63;
237 break;
238 case NID_md5:
239 /*
240 * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
241 * puts a chosen-prefix attack for MD5 at 2^39.
242 */
243 siginf->secbits = 39;
244 break;
245 case NID_id_GostR3411_94:
246 /*
247 * There is a collision attack on GOST R 34.11-94 at 2^105, see
248 * https://link.springer.com/chapter/10.1007%2F978-3-540-85174-5_10
249 */
250 siginf->secbits = 105;
251 break;
252 default:
253 /* Security bits: half number of bits in digest */
254 if ((md = EVP_get_digestbynid(mdnid)) == NULL) {
255 ERR_raise(ERR_LIB_X509, X509_R_ERROR_GETTING_MD_BY_NID);
256 return 0;
257 }
258 siginf->secbits = EVP_MD_size(md) * 4;
259 break;
260 }
261 switch (mdnid) {
262 case NID_sha1:
263 case NID_sha256:
264 case NID_sha384:
265 case NID_sha512:
266 siginf->flags |= X509_SIG_INFO_TLS;
267 }
268 siginf->flags |= X509_SIG_INFO_VALID;
269 return 1;
270 }
271
272 /* Returns 1 on success, 0 on failure */
273 int ossl_x509_init_sig_info(X509 *x)
274 {
275 return x509_sig_info_init(&x->siginf, &x->sig_alg, &x->signature);
276 }