3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
62 #include <openssl/bn.h>
63 #include <openssl/dh.h>
64 #include <openssl/objects.h>
65 #include <openssl/asn1t.h>
67 /* Override the default free and new methods */
68 static int dh_cb(int operation
, ASN1_VALUE
**pval
, const ASN1_ITEM
*it
,
71 if (operation
== ASN1_OP_NEW_PRE
) {
72 *pval
= (ASN1_VALUE
*)DH_new();
76 } else if (operation
== ASN1_OP_FREE_PRE
) {
84 ASN1_SEQUENCE_cb(DHparams
, dh_cb
) = {
85 ASN1_SIMPLE(DH
, p
, BIGNUM
),
86 ASN1_SIMPLE(DH
, g
, BIGNUM
),
87 ASN1_OPT(DH
, length
, ZLONG
),
88 } ASN1_SEQUENCE_END_cb(DH
, DHparams
)
90 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DH
, DHparams
, DHparams
)
93 * Internal only structures for handling X9.42 DH: this gets translated to or
94 * from a DH structure straight away.
98 ASN1_BIT_STRING
*seed
;
107 int_dhvparams
*vparams
;
110 ASN1_SEQUENCE(DHvparams
) = {
111 ASN1_SIMPLE(int_dhvparams
, seed
, ASN1_BIT_STRING
),
112 ASN1_SIMPLE(int_dhvparams
, counter
, BIGNUM
)
113 } ASN1_SEQUENCE_END_name(int_dhvparams
, DHvparams
)
115 ASN1_SEQUENCE(DHxparams
) = {
116 ASN1_SIMPLE(int_dhx942_dh
, p
, BIGNUM
),
117 ASN1_SIMPLE(int_dhx942_dh
, g
, BIGNUM
),
118 ASN1_SIMPLE(int_dhx942_dh
, q
, BIGNUM
),
119 ASN1_OPT(int_dhx942_dh
, j
, BIGNUM
),
120 ASN1_OPT(int_dhx942_dh
, vparams
, DHvparams
),
121 } ASN1_SEQUENCE_END_name(int_dhx942_dh
, DHxparams
)
123 int_dhx942_dh
*d2i_int_dhx(int_dhx942_dh
**a
,
124 const unsigned char **pp
, long length
);
125 int i2d_int_dhx(const int_dhx942_dh
*a
, unsigned char **pp
);
127 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(int_dhx942_dh
, DHxparams
, int_dhx
)
129 /* Application leve function: read in X9.42 DH parameters into DH structure */
131 DH
*d2i_DHxparams(DH
**a
, const unsigned char **pp
, long length
)
133 int_dhx942_dh
*dhx
= NULL
;
138 dhx
= d2i_int_dhx(NULL
, pp
, length
);
156 dh
->seed
= dhx
->vparams
->seed
->data
;
157 dh
->seedlen
= dhx
->vparams
->seed
->length
;
158 dh
->counter
= dhx
->vparams
->counter
;
159 dhx
->vparams
->seed
->data
= NULL
;
160 ASN1_BIT_STRING_free(dhx
->vparams
->seed
);
161 OPENSSL_free(dhx
->vparams
);
169 int i2d_DHxparams(const DH
*dh
, unsigned char **pp
)
178 if (dh
->counter
&& dh
->seed
&& dh
->seedlen
> 0) {
179 bs
.flags
= ASN1_STRING_FLAG_BITS_LEFT
;
181 bs
.length
= dh
->seedlen
;
183 dhv
.counter
= dh
->counter
;
188 return i2d_int_dhx(&dhx
, pp
);