1 /* $OpenBSD: dh_asn1.c,v 1.11 2022/01/07 09:27:13 tb Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5 /* ====================================================================
6 * Copyright (c) 2000-2005 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 <stdio.h>
60
61 #include <openssl/asn1t.h>
62 #include <openssl/bn.h>
63 #include <openssl/dh.h>
64 #include <openssl/objects.h>
65
66 #include "dh_local.h"
67
68 /* Override the default free and new methods */
69 static int
dh_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)70 dh_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
71 {
72 if (operation == ASN1_OP_NEW_PRE) {
73 *pval = (ASN1_VALUE *)DH_new();
74 if (*pval)
75 return 2;
76 return 0;
77 } else if (operation == ASN1_OP_FREE_PRE) {
78 DH_free((DH *)*pval);
79 *pval = NULL;
80 return 2;
81 }
82 return 1;
83 }
84
85 static const ASN1_AUX DHparams_aux = {
86 .app_data = NULL,
87 .flags = 0,
88 .ref_offset = 0,
89 .ref_lock = 0,
90 .asn1_cb = dh_cb,
91 .enc_offset = 0,
92 };
93 static const ASN1_TEMPLATE DHparams_seq_tt[] = {
94 {
95 .flags = 0,
96 .tag = 0,
97 .offset = offsetof(DH, p),
98 .field_name = "p",
99 .item = &BIGNUM_it,
100 },
101 {
102 .flags = 0,
103 .tag = 0,
104 .offset = offsetof(DH, g),
105 .field_name = "g",
106 .item = &BIGNUM_it,
107 },
108 {
109 .flags = ASN1_TFLG_OPTIONAL,
110 .tag = 0,
111 .offset = offsetof(DH, length),
112 .field_name = "length",
113 .item = &ZLONG_it,
114 },
115 };
116
117 const ASN1_ITEM DHparams_it = {
118 .itype = ASN1_ITYPE_SEQUENCE,
119 .utype = V_ASN1_SEQUENCE,
120 .templates = DHparams_seq_tt,
121 .tcount = sizeof(DHparams_seq_tt) / sizeof(ASN1_TEMPLATE),
122 .funcs = &DHparams_aux,
123 .size = sizeof(DH),
124 .sname = "DH",
125 };
126
127
128 DH *
d2i_DHparams(DH ** a,const unsigned char ** in,long len)129 d2i_DHparams(DH **a, const unsigned char **in, long len)
130 {
131 return (DH *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
132 &DHparams_it);
133 }
134
135 int
i2d_DHparams(const DH * a,unsigned char ** out)136 i2d_DHparams(const DH *a, unsigned char **out)
137 {
138 return ASN1_item_i2d((ASN1_VALUE *)a, out, &DHparams_it);
139 }
140
141 DH *
d2i_DHparams_bio(BIO * bp,DH ** a)142 d2i_DHparams_bio(BIO *bp, DH **a)
143 {
144 return ASN1_item_d2i_bio(&DHparams_it, bp, a);
145 }
146
147 int
i2d_DHparams_bio(BIO * bp,DH * a)148 i2d_DHparams_bio(BIO *bp, DH *a)
149 {
150 return ASN1_item_i2d_bio(&DHparams_it, bp, a);
151 }
152
153 DH *
d2i_DHparams_fp(FILE * fp,DH ** a)154 d2i_DHparams_fp(FILE *fp, DH **a)
155 {
156 return ASN1_item_d2i_fp(&DHparams_it, fp, a);
157 }
158
159 int
i2d_DHparams_fp(FILE * fp,DH * a)160 i2d_DHparams_fp(FILE *fp, DH *a)
161 {
162 return ASN1_item_i2d_fp(&DHparams_it, fp, a);
163 }
164
165 DH *
DHparams_dup(DH * dh)166 DHparams_dup(DH *dh)
167 {
168 return ASN1_item_dup(&DHparams_it, dh);
169 }
170