2 * Copyright 1998-2021 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 <openssl/x509.h>
12 #include <openssl/asn1.h>
13 #include <openssl/asn1t.h>
14 #include <openssl/err.h>
15 #include "crypto/asn1.h"
16 #include "crypto/evp.h"
18 ASN1_SEQUENCE(X509_ALGOR) = {
19 ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
20 ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
21 } ASN1_SEQUENCE_END(X509_ALGOR)
23 ASN1_ITEM_TEMPLATE(X509_ALGORS) =
24 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
25 ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
27 IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
28 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
29 IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
31 int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
36 if (ptype != V_ASN1_UNDEF) {
37 if (alg->parameter == NULL)
38 alg->parameter = ASN1_TYPE_new();
39 if (alg->parameter == NULL)
43 ASN1_OBJECT_free(alg->algorithm);
44 alg->algorithm = aobj;
48 if (ptype == V_ASN1_UNDEF) {
49 ASN1_TYPE_free(alg->parameter);
50 alg->parameter = NULL;
52 ASN1_TYPE_set(alg->parameter, ptype, pval);
56 void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype,
57 const void **ppval, const X509_ALGOR *algor)
60 *paobj = algor->algorithm;
62 if (algor->parameter == NULL) {
63 *pptype = V_ASN1_UNDEF;
66 *pptype = algor->parameter->type;
68 *ppval = algor->parameter->value.ptr;
72 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
74 void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
78 if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
79 param_type = V_ASN1_UNDEF;
81 param_type = V_ASN1_NULL;
83 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_get_type(md)), param_type, NULL);
87 int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
90 rv = OBJ_cmp(a->algorithm, b->algorithm);
93 if (!a->parameter && !b->parameter)
95 return ASN1_TYPE_cmp(a->parameter, b->parameter);
98 int X509_ALGOR_copy(X509_ALGOR *dest, const X509_ALGOR *src)
100 if (src == NULL || dest == NULL)
104 ASN1_OBJECT_free(dest->algorithm);
105 dest->algorithm = NULL;
108 ASN1_TYPE_free(dest->parameter);
109 dest->parameter = NULL;
112 if ((dest->algorithm = OBJ_dup(src->algorithm)) == NULL)
115 if (src->parameter != NULL) {
116 dest->parameter = ASN1_TYPE_new();
117 if (dest->parameter == NULL)
120 /* Assuming this is also correct for a BOOL.
121 * set does copy as a side effect.
123 if (ASN1_TYPE_set1(dest->parameter,
124 src->parameter->type, src->parameter->value.ptr) == 0)
131 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
132 int ossl_x509_algor_new_from_md(X509_ALGOR **palg, const EVP_MD *md)
134 /* Default is SHA1 so no need to create it - still success */
135 if (md == NULL || EVP_MD_is_a(md, "SHA1"))
137 *palg = X509_ALGOR_new();
140 X509_ALGOR_set_md(*palg, md);
144 /* convert algorithm ID to EVP_MD, default SHA1 */
145 const EVP_MD *ossl_x509_algor_get_md(X509_ALGOR *alg)
151 md = EVP_get_digestbyobj(alg->algorithm);
153 ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_DIGEST);
157 X509_ALGOR *ossl_x509_algor_mgf1_decode(X509_ALGOR *alg)
159 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
161 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
165 /* Allocate and set MGF1 algorithm ID from EVP_MD */
166 int ossl_x509_algor_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
168 X509_ALGOR *algtmp = NULL;
169 ASN1_STRING *stmp = NULL;
172 if (mgf1md == NULL || EVP_MD_is_a(mgf1md, "SHA1"))
174 /* need to embed algorithm ID inside another */
175 if (!ossl_x509_algor_new_from_md(&algtmp, mgf1md))
177 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
179 *palg = X509_ALGOR_new();
182 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
185 ASN1_STRING_free(stmp);
186 X509_ALGOR_free(algtmp);