2 * Copyright 1995-2020 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 #ifndef OPENSSL_NO_RFC3779
19 DEFINE_STACK_OF(IPAddressFamily)
22 ASN1_SEQUENCE_enc(X509_CINF, enc, 0) = {
23 ASN1_EXP_OPT(X509_CINF, version, ASN1_INTEGER, 0),
24 ASN1_EMBED(X509_CINF, serialNumber, ASN1_INTEGER),
25 ASN1_EMBED(X509_CINF, signature, X509_ALGOR),
26 ASN1_SIMPLE(X509_CINF, issuer, X509_NAME),
27 ASN1_EMBED(X509_CINF, validity, X509_VAL),
28 ASN1_SIMPLE(X509_CINF, subject, X509_NAME),
29 ASN1_SIMPLE(X509_CINF, key, X509_PUBKEY),
30 ASN1_IMP_OPT(X509_CINF, issuerUID, ASN1_BIT_STRING, 1),
31 ASN1_IMP_OPT(X509_CINF, subjectUID, ASN1_BIT_STRING, 2),
32 ASN1_EXP_SEQUENCE_OF_OPT(X509_CINF, extensions, X509_EXTENSION, 3)
33 } ASN1_SEQUENCE_END_enc(X509_CINF, X509_CINF)
35 IMPLEMENT_ASN1_FUNCTIONS(X509_CINF)
36 /* X509 top level structure needs a bit of customisation */
38 extern void policy_cache_free(X509_POLICY_CACHE *cache);
40 static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
43 X509 *ret = (X509 *)*pval;
48 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
49 X509_CERT_AUX_free(ret->aux);
50 ASN1_OCTET_STRING_free(ret->skid);
51 AUTHORITY_KEYID_free(ret->akid);
52 CRL_DIST_POINTS_free(ret->crldp);
53 policy_cache_free(ret->policy_cache);
54 GENERAL_NAMES_free(ret->altname);
55 NAME_CONSTRAINTS_free(ret->nc);
56 #ifndef OPENSSL_NO_RFC3779
57 sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
58 ASIdentifiers_free(ret->rfc3779_asid);
60 ASN1_OCTET_STRING_free(ret->distinguishing_id);
64 case ASN1_OP_NEW_POST:
71 ret->ex_pcpathlen = -1;
74 ret->policy_cache = NULL;
77 #ifndef OPENSSL_NO_RFC3779
78 ret->rfc3779_addr = NULL;
79 ret->rfc3779_asid = NULL;
81 ret->distinguishing_id = NULL;
84 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data))
88 case ASN1_OP_FREE_POST:
89 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
90 X509_CERT_AUX_free(ret->aux);
91 ASN1_OCTET_STRING_free(ret->skid);
92 AUTHORITY_KEYID_free(ret->akid);
93 CRL_DIST_POINTS_free(ret->crldp);
94 policy_cache_free(ret->policy_cache);
95 GENERAL_NAMES_free(ret->altname);
96 NAME_CONSTRAINTS_free(ret->nc);
97 #ifndef OPENSSL_NO_RFC3779
98 sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
99 ASIdentifiers_free(ret->rfc3779_asid);
101 ASN1_OCTET_STRING_free(ret->distinguishing_id);
110 ASN1_SEQUENCE_ref(X509, x509_cb) = {
111 ASN1_EMBED(X509, cert_info, X509_CINF),
112 ASN1_EMBED(X509, sig_alg, X509_ALGOR),
113 ASN1_EMBED(X509, signature, ASN1_BIT_STRING)
114 } ASN1_SEQUENCE_END_ref(X509, X509)
116 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(X509, X509, X509)
117 IMPLEMENT_ASN1_DUP_FUNCTION(X509)
119 X509 *d2i_X509(X509 **a, const unsigned char **in, long len)
123 cert = (X509 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, (X509_it()));
124 /* Only cache the extensions if the cert object was passed in */
125 if (cert != NULL && a != NULL) {
126 if (!x509v3_cache_extensions(cert))
131 int i2d_X509(const X509 *a, unsigned char **out)
133 return ASN1_item_i2d((const ASN1_VALUE *)a, out, (X509_it()));
136 X509 *X509_new_with_libctx(OPENSSL_CTX *libctx, const char *propq)
140 cert = (X509 *)ASN1_item_new((X509_it()));
142 cert->libctx = libctx;
148 int X509_set_ex_data(X509 *r, int idx, void *arg)
150 return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
153 void *X509_get_ex_data(const X509 *r, int idx)
155 return CRYPTO_get_ex_data(&r->ex_data, idx);
159 * X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with
160 * extra info tagged on the end. Since these functions set how a certificate
161 * is trusted they should only be used when the certificate comes from a
162 * reliable source such as local storage.
165 X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
167 const unsigned char *q;
171 /* Save start position */
174 if (a == NULL || *a == NULL)
176 ret = d2i_X509(a, &q, length);
177 /* If certificate unreadable then forget it */
182 if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length))
196 * Serialize trusted certificate to *pp or just return the required buffer
197 * length if pp == NULL. We ultimately want to avoid modifying *pp in the
198 * error path, but that depends on similar hygiene in lower-level functions.
199 * Here we avoid compounding the problem.
201 static int i2d_x509_aux_internal(const X509 *a, unsigned char **pp)
204 unsigned char *start = pp != NULL ? *pp : NULL;
207 * This might perturb *pp on error, but fixing that belongs in i2d_X509()
208 * not here. It should be that if a == NULL length is zero, but we check
211 length = i2d_X509(a, pp);
212 if (length <= 0 || a == NULL)
215 tmplen = i2d_X509_CERT_AUX(a->aux, pp);
227 * Serialize trusted certificate to *pp, or just return the required buffer
228 * length if pp == NULL.
230 * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since
231 * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do
232 * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the
235 int i2d_X509_AUX(const X509 *a, unsigned char **pp)
240 /* Buffer provided by caller */
241 if (pp == NULL || *pp != NULL)
242 return i2d_x509_aux_internal(a, pp);
244 /* Obtain the combined length */
245 if ((length = i2d_x509_aux_internal(a, NULL)) <= 0)
248 /* Allocate requisite combined storage */
249 *pp = tmp = OPENSSL_malloc(length);
251 X509err(X509_F_I2D_X509_AUX, ERR_R_MALLOC_FAILURE);
255 /* Encode, but keep *pp at the originally malloced pointer */
256 length = i2d_x509_aux_internal(a, &tmp);
264 int i2d_re_X509_tbs(X509 *x, unsigned char **pp)
266 x->cert_info.enc.modified = 1;
267 return i2d_X509_CINF(&x->cert_info, pp);
270 void X509_get0_signature(const ASN1_BIT_STRING **psig,
271 const X509_ALGOR **palg, const X509 *x)
274 *psig = &x->signature;
279 int X509_get_signature_nid(const X509 *x)
281 return OBJ_obj2nid(x->sig_alg.algorithm);
284 void X509_set0_distinguishing_id(X509 *x, ASN1_OCTET_STRING *d_id)
286 ASN1_OCTET_STRING_free(x->distinguishing_id);
287 x->distinguishing_id = d_id;
290 ASN1_OCTET_STRING *X509_get0_distinguishing_id(X509 *x)
292 return x->distinguishing_id;