1/*
2 * Copyright 1998-2016 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 <stddef.h>
11#include <openssl/x509.h>
12#include <openssl/asn1.h>
13#include <openssl/asn1t.h>
14#include "crypto/evp.h"
15
16ASN1_SEQUENCE(X509_ALGOR) = {
17 ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
18 ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
19} ASN1_SEQUENCE_END(X509_ALGOR)
20
21ASN1_ITEM_TEMPLATE(X509_ALGORS) =
22 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
23ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
24
25IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
26IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
27IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
28
29int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
30{
31 if (alg == NULL)
32 return 0;
33
34 if (ptype != V_ASN1_UNDEF) {
35 if (alg->parameter == NULL)
36 alg->parameter = ASN1_TYPE_new();
37 if (alg->parameter == NULL)
38 return 0;
39 }
40
41 ASN1_OBJECT_free(alg->algorithm);
42 alg->algorithm = aobj;
43
44 if (ptype == 0)
45 return 1;
46 if (ptype == V_ASN1_UNDEF) {
47 ASN1_TYPE_free(alg->parameter);
48 alg->parameter = NULL;
49 } else
50 ASN1_TYPE_set(alg->parameter, ptype, pval);
51 return 1;
52}
53
54void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype,
55 const void **ppval, const X509_ALGOR *algor)
56{
57 if (paobj)
58 *paobj = algor->algorithm;
59 if (pptype) {
60 if (algor->parameter == NULL) {
61 *pptype = V_ASN1_UNDEF;
62 return;
63 } else
64 *pptype = algor->parameter->type;
65 if (ppval)
66 *ppval = algor->parameter->value.ptr;
67 }
68}
69
70/* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
71
72void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
73{
74 int param_type;
75
76 if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
77 param_type = V_ASN1_UNDEF;
78 else
79 param_type = V_ASN1_NULL;
80
81 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
82
83}
84
85int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
86{
87 int rv;
88 rv = OBJ_cmp(a->algorithm, b->algorithm);
89 if (rv)
90 return rv;
91 if (!a->parameter && !b->parameter)
92 return 0;
93 return ASN1_TYPE_cmp(a->parameter, b->parameter);
94}
95