2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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
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"
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)
31 IMPLEMENT_ASN1_FUNCTIONS(X509_CINF)
32 /* X509 top level structure needs a bit of customisation */
34 extern void ossl_policy_cache_free(X509_POLICY_CACHE *cache);
36 static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
39 X509 *ret = (X509 *)*pval;
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);
56 ASN1_OCTET_STRING_free(ret->distinguishing_id);
60 case ASN1_OP_NEW_POST:
67 ret->ex_pcpathlen = -1;
70 ret->policy_cache = NULL;
73 #ifndef OPENSSL_NO_RFC3779
74 ret->rfc3779_addr = NULL;
75 ret->rfc3779_asid = NULL;
77 ret->distinguishing_id = NULL;
80 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data))
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);
97 ASN1_OCTET_STRING_free(ret->distinguishing_id);
98 OPENSSL_free(ret->propq);
101 case ASN1_OP_DUP_POST:
105 if (!ossl_x509_set0_libctx(ret, old->libctx, old->propq))
116 ASN1_SEQUENCE_ref(X509, x509_cb) = {
117 ASN1_EMBED(X509, cert_info, X509_CINF),
118 ASN1_EMBED(X509, sig_alg, X509_ALGOR),
119 ASN1_EMBED(X509, signature, ASN1_BIT_STRING)
120 } ASN1_SEQUENCE_END_ref(X509, X509)
122 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(X509, X509, X509)
123 IMPLEMENT_ASN1_DUP_FUNCTION(X509)
125 X509 *d2i_X509(X509 **a, const unsigned char **in, long len)
128 int free_on_error = a != NULL && *a == NULL;
130 cert = (X509 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, (X509_it()));
131 /* Only cache the extensions if the cert object was passed in */
132 if (cert != NULL && a != NULL) { /* then cert == *a */
133 if (!ossl_x509v3_cache_extensions(cert)) {
143 int i2d_X509(const X509 *a, unsigned char **out)
145 return ASN1_item_i2d((const ASN1_VALUE *)a, out, (X509_it()));
149 * This should only be used if the X509 object was embedded inside another
150 * asn1 object and it needs a libctx to operate.
151 * Use X509_new_ex() instead if possible.
153 int ossl_x509_set0_libctx(X509 *x, OSSL_LIB_CTX *libctx, const char *propq)
157 OPENSSL_free(x->propq);
160 x->propq = OPENSSL_strdup(propq);
161 if (x->propq == NULL)
168 X509 *X509_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
172 cert = (X509 *)ASN1_item_new((X509_it()));
173 if (!ossl_x509_set0_libctx(cert, libctx, propq)) {
180 int X509_set_ex_data(X509 *r, int idx, void *arg)
182 return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
185 void *X509_get_ex_data(const X509 *r, int idx)
187 return CRYPTO_get_ex_data(&r->ex_data, idx);
191 * X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with
192 * extra info tagged on the end. Since these functions set how a certificate
193 * is trusted they should only be used when the certificate comes from a
194 * reliable source such as local storage.
197 X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
199 const unsigned char *q;
203 /* Save start position */
206 if (a == NULL || *a == NULL)
208 ret = d2i_X509(a, &q, length);
209 /* If certificate unreadable then forget it */
214 if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length))
228 * Serialize trusted certificate to *pp or just return the required buffer
229 * length if pp == NULL. We ultimately want to avoid modifying *pp in the
230 * error path, but that depends on similar hygiene in lower-level functions.
231 * Here we avoid compounding the problem.
233 static int i2d_x509_aux_internal(const X509 *a, unsigned char **pp)
236 unsigned char *start = pp != NULL ? *pp : NULL;
239 * This might perturb *pp on error, but fixing that belongs in i2d_X509()
240 * not here. It should be that if a == NULL length is zero, but we check
243 length = i2d_X509(a, pp);
244 if (length <= 0 || a == NULL)
247 tmplen = i2d_X509_CERT_AUX(a->aux, pp);
259 * Serialize trusted certificate to *pp, or just return the required buffer
260 * length if pp == NULL.
262 * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since
263 * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do
264 * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the
267 int i2d_X509_AUX(const X509 *a, unsigned char **pp)
272 /* Buffer provided by caller */
273 if (pp == NULL || *pp != NULL)
274 return i2d_x509_aux_internal(a, pp);
276 /* Obtain the combined length */
277 if ((length = i2d_x509_aux_internal(a, NULL)) <= 0)
280 /* Allocate requisite combined storage */
281 *pp = tmp = OPENSSL_malloc(length);
283 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
287 /* Encode, but keep *pp at the originally malloced pointer */
288 length = i2d_x509_aux_internal(a, &tmp);
296 int i2d_re_X509_tbs(X509 *x, unsigned char **pp)
298 x->cert_info.enc.modified = 1;
299 return i2d_X509_CINF(&x->cert_info, pp);
302 void X509_get0_signature(const ASN1_BIT_STRING **psig,
303 const X509_ALGOR **palg, const X509 *x)
306 *psig = &x->signature;
311 int X509_get_signature_nid(const X509 *x)
313 return OBJ_obj2nid(x->sig_alg.algorithm);
316 void X509_set0_distinguishing_id(X509 *x, ASN1_OCTET_STRING *d_id)
318 ASN1_OCTET_STRING_free(x->distinguishing_id);
319 x->distinguishing_id = d_id;
322 ASN1_OCTET_STRING *X509_get0_distinguishing_id(X509 *x)
324 return x->distinguishing_id;