x_algor.c revision 296341 
1/* x_algor.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2000.
5 */
6/* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <stddef.h>
61#include <openssl/x509.h>
62#include <openssl/asn1.h>
63#include <openssl/asn1t.h>
64
65ASN1_SEQUENCE(X509_ALGOR) = {
66        ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
67        ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
68} ASN1_SEQUENCE_END(X509_ALGOR)
69
70ASN1_ITEM_TEMPLATE(X509_ALGORS) =
71        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
72ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
73
74IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
75IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
76IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
77
78IMPLEMENT_STACK_OF(X509_ALGOR)
79IMPLEMENT_ASN1_SET_OF(X509_ALGOR)
80
81int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
82{
83    if (!alg)
84        return 0;
85    if (ptype != V_ASN1_UNDEF) {
86        if (alg->parameter == NULL)
87            alg->parameter = ASN1_TYPE_new();
88        if (alg->parameter == NULL)
89            return 0;
90    }
91    if (alg) {
92        if (alg->algorithm)
93            ASN1_OBJECT_free(alg->algorithm);
94        alg->algorithm = aobj;
95    }
96    if (ptype == 0)
97        return 1;
98    if (ptype == V_ASN1_UNDEF) {
99        if (alg->parameter) {
100            ASN1_TYPE_free(alg->parameter);
101            alg->parameter = NULL;
102        }
103    } else
104        ASN1_TYPE_set(alg->parameter, ptype, pval);
105    return 1;
106}
107
108void X509_ALGOR_get0(ASN1_OBJECT **paobj, int *pptype, void **ppval,
109                     X509_ALGOR *algor)
110{
111    if (paobj)
112        *paobj = algor->algorithm;
113    if (pptype) {
114        if (algor->parameter == NULL) {
115            *pptype = V_ASN1_UNDEF;
116            return;
117        } else
118            *pptype = algor->parameter->type;
119        if (ppval)
120            *ppval = algor->parameter->value.ptr;
121    }
122}
123
124/* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
125
126void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
127{
128    int param_type;
129
130    if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
131        param_type = V_ASN1_UNDEF;
132    else
133        param_type = V_ASN1_NULL;
134
135    X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
136
137}
138
139int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
140{
141    int rv;
142    rv = OBJ_cmp(a->algorithm, b->algorithm);
143    if (rv)
144        return rv;
145    if (!a->parameter && !b->parameter)
146        return 0;
147    return ASN1_TYPE_cmp(a->parameter, b->parameter);
148}
149