1 /* $OpenBSD: x_algor.c,v 1.23 2021/12/12 14:27:20 tb Exp $ */
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
64 static const ASN1_TEMPLATE X509_ALGOR_seq_tt[] = {
65 {
66 .offset = offsetof(X509_ALGOR, algorithm),
67 .field_name = "algorithm",
68 .item = &ASN1_OBJECT_it,
69 },
70 {
71 .flags = ASN1_TFLG_OPTIONAL,
72 .offset = offsetof(X509_ALGOR, parameter),
73 .field_name = "parameter",
74 .item = &ASN1_ANY_it,
75 },
76 };
77
78 const ASN1_ITEM X509_ALGOR_it = {
79 .itype = ASN1_ITYPE_SEQUENCE,
80 .utype = V_ASN1_SEQUENCE,
81 .templates = X509_ALGOR_seq_tt,
82 .tcount = sizeof(X509_ALGOR_seq_tt) / sizeof(ASN1_TEMPLATE),
83 .size = sizeof(X509_ALGOR),
84 .sname = "X509_ALGOR",
85 };
86
87 static const ASN1_TEMPLATE X509_ALGORS_item_tt = {
88 .flags = ASN1_TFLG_SEQUENCE_OF,
89 .tag = 0,
90 .offset = 0,
91 .field_name = "algorithms",
92 .item = &X509_ALGOR_it,
93 };
94
95 const ASN1_ITEM X509_ALGORS_it = {
96 .itype = ASN1_ITYPE_PRIMITIVE,
97 .utype = -1,
98 .templates = &X509_ALGORS_item_tt,
99 .tcount = 0,
100 .funcs = NULL,
101 .size = 0,
102 .sname = "X509_ALGORS",
103 };
104
105
106 X509_ALGOR *
d2i_X509_ALGOR(X509_ALGOR ** a,const unsigned char ** in,long len)107 d2i_X509_ALGOR(X509_ALGOR **a, const unsigned char **in, long len)
108 {
109 return (X509_ALGOR *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
110 &X509_ALGOR_it);
111 }
112
113 int
i2d_X509_ALGOR(X509_ALGOR * a,unsigned char ** out)114 i2d_X509_ALGOR(X509_ALGOR *a, unsigned char **out)
115 {
116 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGOR_it);
117 }
118
119 X509_ALGOR *
X509_ALGOR_new(void)120 X509_ALGOR_new(void)
121 {
122 return (X509_ALGOR *)ASN1_item_new(&X509_ALGOR_it);
123 }
124
125 void
X509_ALGOR_free(X509_ALGOR * a)126 X509_ALGOR_free(X509_ALGOR *a)
127 {
128 ASN1_item_free((ASN1_VALUE *)a, &X509_ALGOR_it);
129 }
130
131 X509_ALGORS *
d2i_X509_ALGORS(X509_ALGORS ** a,const unsigned char ** in,long len)132 d2i_X509_ALGORS(X509_ALGORS **a, const unsigned char **in, long len)
133 {
134 return (X509_ALGORS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
135 &X509_ALGORS_it);
136 }
137
138 int
i2d_X509_ALGORS(X509_ALGORS * a,unsigned char ** out)139 i2d_X509_ALGORS(X509_ALGORS *a, unsigned char **out)
140 {
141 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ALGORS_it);
142 }
143
144 X509_ALGOR *
X509_ALGOR_dup(X509_ALGOR * x)145 X509_ALGOR_dup(X509_ALGOR *x)
146 {
147 return ASN1_item_dup(&X509_ALGOR_it, x);
148 }
149
150 int
X509_ALGOR_set0(X509_ALGOR * alg,ASN1_OBJECT * aobj,int ptype,void * pval)151 X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
152 {
153 if (!alg)
154 return 0;
155 if (ptype != V_ASN1_UNDEF) {
156 if (alg->parameter == NULL)
157 alg->parameter = ASN1_TYPE_new();
158 if (alg->parameter == NULL)
159 return 0;
160 }
161 if (alg) {
162 if (alg->algorithm)
163 ASN1_OBJECT_free(alg->algorithm);
164 alg->algorithm = aobj;
165 }
166 if (ptype == 0)
167 return 1;
168 if (ptype == V_ASN1_UNDEF) {
169 if (alg->parameter) {
170 ASN1_TYPE_free(alg->parameter);
171 alg->parameter = NULL;
172 }
173 } else
174 ASN1_TYPE_set(alg->parameter, ptype, pval);
175 return 1;
176 }
177
178 void
X509_ALGOR_get0(const ASN1_OBJECT ** paobj,int * pptype,const void ** ppval,const X509_ALGOR * algor)179 X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype, const void **ppval,
180 const X509_ALGOR *algor)
181 {
182 if (paobj)
183 *paobj = algor->algorithm;
184 if (pptype) {
185 if (algor->parameter == NULL) {
186 *pptype = V_ASN1_UNDEF;
187 return;
188 } else
189 *pptype = algor->parameter->type;
190 if (ppval)
191 *ppval = algor->parameter->value.ptr;
192 }
193 }
194
195 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
196
197 void
X509_ALGOR_set_md(X509_ALGOR * alg,const EVP_MD * md)198 X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
199 {
200 int param_type = V_ASN1_NULL;
201
202 if ((EVP_MD_flags(md) & EVP_MD_FLAG_DIGALGID_ABSENT) != 0)
203 param_type = V_ASN1_UNDEF;
204
205 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
206 }
207
208 /* Returns 0 if they are equal, != 0 otherwise. */
209 int
X509_ALGOR_cmp(const X509_ALGOR * a,const X509_ALGOR * b)210 X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
211 {
212 int rv = OBJ_cmp(a->algorithm, b->algorithm);
213 if (!rv) {
214 if (!a->parameter && !b->parameter)
215 rv = 0;
216 else
217 rv = ASN1_TYPE_cmp(a->parameter, b->parameter);
218 }
219 return(rv);
220 }
221