1 /*
2 * Copyright (c) 2000, 2001, 2002 X-Way Rights BV
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 */
19
20 /*!\file dlkp.c
21 * \brief Discrete Logarithm keypair.
22 * \author Bob Deblier <bob.deblier@telenet.be>
23 * \ingroup DL_m
24 */
25
26 #define BEECRYPT_DLL_EXPORT
27
28 #if HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include "beecrypt/dlkp.h"
33
dlkp_pPair(dlkp_p * kp,randomGeneratorContext * rgc,const dldp_p * param)34 int dlkp_pPair(dlkp_p* kp, randomGeneratorContext* rgc, const dldp_p* param)
35 {
36 /* copy the parameters */
37 if (dldp_pCopy(&kp->param, param) < 0)
38 return -1;
39
40 if (dldp_pPair(param, rgc, &kp->x, &kp->y) < 0)
41 return -1;
42
43 return 0;
44 }
45
dlkp_pInit(dlkp_p * kp)46 int dlkp_pInit(dlkp_p* kp)
47 {
48 if (dldp_pInit(&kp->param) < 0)
49 return -1;
50
51 mpnzero(&kp->y);
52 mpnzero(&kp->x);
53
54 return 0;
55 }
56
dlkp_pFree(dlkp_p * kp)57 int dlkp_pFree(dlkp_p* kp)
58 {
59 if (dldp_pFree(&kp->param) < 0)
60 return -1;
61
62 mpnfree(&kp->y);
63 /* wipe secret key before freeing */
64 mpnwipe(&kp->x);
65 mpnfree(&kp->x);
66
67 return 0;
68 }
69
dlkp_pCopy(dlkp_p * dst,const dlkp_p * src)70 int dlkp_pCopy(dlkp_p* dst, const dlkp_p* src)
71 {
72 if (dldp_pCopy(&dst->param, &src->param) < 0)
73 return -1;
74
75 mpncopy(&dst->y, &src->y);
76 mpncopy(&dst->x, &src->x);
77
78 return 0;
79 }
80