2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
60 #include "internal/cryptlib.h"
61 #include <openssl/bn.h>
62 #include <openssl/dh.h>
63 #include <openssl/objects.h>
64 #include <openssl/asn1t.h>
66 /* Override the default free and new methods */
67 static int dh_cb(int operation
, ASN1_VALUE
**pval
, const ASN1_ITEM
*it
,
70 if (operation
== ASN1_OP_NEW_PRE
) {
71 *pval
= (ASN1_VALUE
*)DH_new();
75 } else if (operation
== ASN1_OP_FREE_PRE
) {
83 ASN1_SEQUENCE_cb(DHparams
, dh_cb
) = {
84 ASN1_SIMPLE(DH
, p
, BIGNUM
),
85 ASN1_SIMPLE(DH
, g
, BIGNUM
),
86 ASN1_OPT(DH
, length
, ZLONG
),
87 } static_ASN1_SEQUENCE_END_cb(DH
, DHparams
)
89 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DH
, DHparams
, DHparams
)
92 * Internal only structures for handling X9.42 DH: this gets translated to or
93 * from a DH structure straight away.
97 ASN1_BIT_STRING
*seed
;
106 int_dhvparams
*vparams
;
109 ASN1_SEQUENCE(DHvparams
) = {
110 ASN1_SIMPLE(int_dhvparams
, seed
, ASN1_BIT_STRING
),
111 ASN1_SIMPLE(int_dhvparams
, counter
, BIGNUM
)
112 } static_ASN1_SEQUENCE_END_name(int_dhvparams
, DHvparams
)
114 ASN1_SEQUENCE(DHxparams
) = {
115 ASN1_SIMPLE(int_dhx942_dh
, p
, BIGNUM
),
116 ASN1_SIMPLE(int_dhx942_dh
, g
, BIGNUM
),
117 ASN1_SIMPLE(int_dhx942_dh
, q
, BIGNUM
),
118 ASN1_OPT(int_dhx942_dh
, j
, BIGNUM
),
119 ASN1_OPT(int_dhx942_dh
, vparams
, DHvparams
),
120 } static_ASN1_SEQUENCE_END_name(int_dhx942_dh
, DHxparams
)
122 int_dhx942_dh
*d2i_int_dhx(int_dhx942_dh
**a
,
123 const unsigned char **pp
, long length
);
124 int i2d_int_dhx(const int_dhx942_dh
*a
, unsigned char **pp
);
126 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(int_dhx942_dh
, DHxparams
, int_dhx
)
128 /* Application public function: read in X9.42 DH parameters into DH structure */
130 DH
*d2i_DHxparams(DH
**a
, const unsigned char **pp
, long length
)
132 int_dhx942_dh
*dhx
= NULL
;
137 dhx
= d2i_int_dhx(NULL
, pp
, length
);
154 dh
->seed
= dhx
->vparams
->seed
->data
;
155 dh
->seedlen
= dhx
->vparams
->seed
->length
;
156 dh
->counter
= dhx
->vparams
->counter
;
157 dhx
->vparams
->seed
->data
= NULL
;
158 ASN1_BIT_STRING_free(dhx
->vparams
->seed
);
159 OPENSSL_free(dhx
->vparams
);
167 int i2d_DHxparams(const DH
*dh
, unsigned char **pp
)
176 if (dh
->counter
&& dh
->seed
&& dh
->seedlen
> 0) {
177 bs
.flags
= ASN1_STRING_FLAG_BITS_LEFT
;
179 bs
.length
= dh
->seedlen
;
181 dhv
.counter
= dh
->counter
;
186 return i2d_int_dhx(&dhx
, pp
);