2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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 "internal/x509_int.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 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 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);
59 case ASN1_OP_NEW_POST:
66 ret->ex_pcpathlen = -1;
69 ret->policy_cache = NULL;
72 #ifndef OPENSSL_NO_RFC3779
73 ret->rfc3779_addr = NULL;
74 ret->rfc3779_asid = NULL;
78 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data))
82 case ASN1_OP_FREE_POST:
83 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
84 X509_CERT_AUX_free(ret->aux);
85 ASN1_OCTET_STRING_free(ret->skid);
86 AUTHORITY_KEYID_free(ret->akid);
87 CRL_DIST_POINTS_free(ret->crldp);
88 policy_cache_free(ret->policy_cache);
89 GENERAL_NAMES_free(ret->altname);
90 NAME_CONSTRAINTS_free(ret->nc);
91 #ifndef OPENSSL_NO_RFC3779
92 sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
93 ASIdentifiers_free(ret->rfc3779_asid);
103 ASN1_SEQUENCE_ref(X509, x509_cb) = {
104 ASN1_EMBED(X509, cert_info, X509_CINF),
105 ASN1_EMBED(X509, sig_alg, X509_ALGOR),
106 ASN1_EMBED(X509, signature, ASN1_BIT_STRING)
107 } ASN1_SEQUENCE_END_ref(X509, X509)
109 IMPLEMENT_ASN1_FUNCTIONS(X509)
111 IMPLEMENT_ASN1_DUP_FUNCTION(X509)
113 int X509_set_ex_data(X509 *r, int idx, void *arg)
115 return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
118 void *X509_get_ex_data(X509 *r, int idx)
120 return CRYPTO_get_ex_data(&r->ex_data, idx);
124 * X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with
125 * extra info tagged on the end. Since these functions set how a certificate
126 * is trusted they should only be used when the certificate comes from a
127 * reliable source such as local storage.
130 X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
132 const unsigned char *q;
136 /* Save start position */
139 if (a == NULL || *a == NULL)
141 ret = d2i_X509(a, &q, length);
142 /* If certificate unreadable then forget it */
147 if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length))
161 * Serialize trusted certificate to *pp or just return the required buffer
162 * length if pp == NULL. We ultimately want to avoid modifying *pp in the
163 * error path, but that depends on similar hygiene in lower-level functions.
164 * Here we avoid compounding the problem.
166 static int i2d_x509_aux_internal(X509 *a, unsigned char **pp)
169 unsigned char *start = pp != NULL ? *pp : NULL;
172 * This might perturb *pp on error, but fixing that belongs in i2d_X509()
173 * not here. It should be that if a == NULL length is zero, but we check
176 length = i2d_X509(a, pp);
177 if (length <= 0 || a == NULL)
180 tmplen = i2d_X509_CERT_AUX(a->aux, pp);
192 * Serialize trusted certificate to *pp, or just return the required buffer
193 * length if pp == NULL.
195 * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since
196 * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do
197 * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the
200 int i2d_X509_AUX(X509 *a, unsigned char **pp)
205 /* Buffer provided by caller */
206 if (pp == NULL || *pp != NULL)
207 return i2d_x509_aux_internal(a, pp);
209 /* Obtain the combined length */
210 if ((length = i2d_x509_aux_internal(a, NULL)) <= 0)
213 /* Allocate requisite combined storage */
214 *pp = tmp = OPENSSL_malloc(length);
216 X509err(X509_F_I2D_X509_AUX, ERR_R_MALLOC_FAILURE);
220 /* Encode, but keep *pp at the originally malloced pointer */
221 length = i2d_x509_aux_internal(a, &tmp);
229 int i2d_re_X509_tbs(X509 *x, unsigned char **pp)
231 x->cert_info.enc.modified = 1;
232 return i2d_X509_CINF(&x->cert_info, pp);
235 void X509_get0_signature(const ASN1_BIT_STRING **psig,
236 const X509_ALGOR **palg, const X509 *x)
239 *psig = &x->signature;
244 int X509_get_signature_nid(const X509 *x)
246 return OBJ_obj2nid(x->sig_alg.algorithm);