1/* x_algor.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stddef.h>
60#include <openssl/x509.h>
61#include <openssl/asn1.h>
62#include <openssl/asn1t.h>
63
64ASN1_SEQUENCE(X509_ALGOR) = {
65	ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
66	ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
67} ASN1_SEQUENCE_END(X509_ALGOR)
68
69ASN1_ITEM_TEMPLATE(X509_ALGORS) =
70	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
71ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
72
73IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
74IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
75IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
76
77IMPLEMENT_STACK_OF(X509_ALGOR)
78IMPLEMENT_ASN1_SET_OF(X509_ALGOR)
79
80int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
81	{
82	if (!alg)
83		return 0;
84	if (ptype != V_ASN1_UNDEF)
85		{
86		if (alg->parameter == NULL)
87			alg->parameter = ASN1_TYPE_new();
88		if (alg->parameter == NULL)
89			return 0;
90		}
91	if (alg)
92		{
93		if (alg->algorithm)
94			ASN1_OBJECT_free(alg->algorithm);
95		alg->algorithm = aobj;
96		}
97	if (ptype == 0)
98		return 1;
99	if (ptype == V_ASN1_UNDEF)
100		{
101		if (alg->parameter)
102			{
103			ASN1_TYPE_free(alg->parameter);
104			alg->parameter = NULL;
105			}
106		}
107	else
108		ASN1_TYPE_set(alg->parameter, ptype, pval);
109	return 1;
110	}
111
112void X509_ALGOR_get0(ASN1_OBJECT **paobj, int *pptype, void **ppval,
113						X509_ALGOR *algor)
114	{
115	if (paobj)
116		*paobj = algor->algorithm;
117	if (pptype)
118		{
119		if (algor->parameter == NULL)
120			{
121			*pptype = V_ASN1_UNDEF;
122			return;
123			}
124		else
125			*pptype = algor->parameter->type;
126		if (ppval)
127			*ppval = algor->parameter->value.ptr;
128		}
129	}
130
131/* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
132
133void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
134	{
135	int param_type;
136
137	if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
138		param_type = V_ASN1_UNDEF;
139	else
140		param_type = V_ASN1_NULL;
141
142	X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
143
144	}
145