2 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/bn.h>
14 #include <openssl/objects.h>
15 #include <openssl/asn1t.h>
17 /* Override the default free and new methods */
18 static int dh_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
21 if (operation == ASN1_OP_NEW_PRE) {
22 *pval = (ASN1_VALUE *)DH_new();
26 } else if (operation == ASN1_OP_FREE_PRE) {
34 ASN1_SEQUENCE_cb(DHparams, dh_cb) = {
35 ASN1_SIMPLE(DH, p, BIGNUM),
36 ASN1_SIMPLE(DH, g, BIGNUM),
37 ASN1_OPT_EMBED(DH, length, ZINT32),
38 } ASN1_SEQUENCE_END_cb(DH, DHparams)
40 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DH, DHparams, DHparams)
43 * Internal only structures for handling X9.42 DH: this gets translated to or
44 * from a DH structure straight away.
48 ASN1_BIT_STRING *seed;
57 int_dhvparams *vparams;
60 ASN1_SEQUENCE(DHvparams) = {
61 ASN1_SIMPLE(int_dhvparams, seed, ASN1_BIT_STRING),
62 ASN1_SIMPLE(int_dhvparams, counter, BIGNUM)
63 } static_ASN1_SEQUENCE_END_name(int_dhvparams, DHvparams)
65 ASN1_SEQUENCE(DHxparams) = {
66 ASN1_SIMPLE(int_dhx942_dh, p, BIGNUM),
67 ASN1_SIMPLE(int_dhx942_dh, g, BIGNUM),
68 ASN1_SIMPLE(int_dhx942_dh, q, BIGNUM),
69 ASN1_OPT(int_dhx942_dh, j, BIGNUM),
70 ASN1_OPT(int_dhx942_dh, vparams, DHvparams),
71 } static_ASN1_SEQUENCE_END_name(int_dhx942_dh, DHxparams)
73 int_dhx942_dh *d2i_int_dhx(int_dhx942_dh **a,
74 const unsigned char **pp, long length);
75 int i2d_int_dhx(const int_dhx942_dh *a, unsigned char **pp);
77 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(int_dhx942_dh, DHxparams, int_dhx)
79 /* Application public function: read in X9.42 DH parameters into DH structure */
81 DH *d2i_DHxparams(DH **a, const unsigned char **pp, long length)
83 int_dhx942_dh *dhx = NULL;
88 dhx = d2i_int_dhx(NULL, pp, length);
105 dh->seed = dhx->vparams->seed->data;
106 dh->seedlen = dhx->vparams->seed->length;
107 dh->counter = dhx->vparams->counter;
108 dhx->vparams->seed->data = NULL;
109 ASN1_BIT_STRING_free(dhx->vparams->seed);
110 OPENSSL_free(dhx->vparams);
118 int i2d_DHxparams(const DH *dh, unsigned char **pp)
127 if (dh->counter && dh->seed && dh->seedlen > 0) {
128 bs.flags = ASN1_STRING_FLAG_BITS_LEFT;
130 bs.length = dh->seedlen;
132 dhv.counter = dh->counter;
137 return i2d_int_dhx(&dhx, pp);