git.distorted.org.uk Git - u/mdw/catacomb/blob - dh-fetch.c

   1 /* -*-c-*-
   2  *
   3  * $Id: dh-fetch.c,v 1.3 2004/04/08 01:36:15 mdw Exp $
   4  *
   5  * Key fetching for Diffie-Hellman public and private keys
   6  *
   7  * (c) 2000 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Catacomb.
  13  *
  14  * Catacomb is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * Catacomb is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with Catacomb; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Header files ------------------------------------------------------*/
  31
  32 #include "dh.h"
  33 #include "key.h"
  34
  35 /*----- Key fetching ------------------------------------------------------*/
  36
  37 const key_fetchdef dh_paramfetch[] = {
  38   { "p",        offsetof(dh_param, p),          KENC_MP,        0 },
  39   { "q",        offsetof(dh_param, q),          KENC_MP,        0 },
  40   { "g",        offsetof(dh_param, g),          KENC_MP,        0 },
  41   { 0,          0,                              0,              0 }
  42 };
  43
  44 const key_fetchdef dh_pubfetch[] = {
  45   { "p",        offsetof(dh_pub, dp.p),         KENC_MP,        0 },
  46   { "q",        offsetof(dh_pub, dp.q),         KENC_MP,        0 },
  47   { "g",        offsetof(dh_pub, dp.g),         KENC_MP,        0 },
  48   { "y",        offsetof(dh_pub, y),            KENC_MP,        0 },
  49   { 0,          0,                              0,              0 }
  50 };
  51
  52 static const key_fetchdef priv[] = {
  53   { "x",        offsetof(dh_priv, x),           KENC_MP,        0 },
  54   { 0,          0,                              0,              0 }
  55 };
  56
  57 const key_fetchdef dh_privfetch[] = {
  58   { "p",        offsetof(dh_priv, dp.p),        KENC_MP,        0 },
  59   { "q",        offsetof(dh_priv, dp.q),        KENC_MP,        0 },
  60   { "g",        offsetof(dh_priv, dp.g),        KENC_MP,        0 },
  61   { "y",        offsetof(dh_priv, y),           KENC_MP,        0 },
  62   { "private",  0,                              KENC_STRUCT,    priv },
  63   { 0,          0,                              0,              0 }
  64 };
  65
  66 /* --- @dh_paramfree@, @dh_pubfree@, @dh_privfree@ --- *
  67  *
  68  * Arguments:   @dh_param *dp@, @dh_pub *dp@, @dh_priv *dp@ = pointer
  69  *                      to key block to free
  70  *
  71  * Returns:     ---
  72  *
  73  * Use:         Frees a Diffie-Hellman key block.
  74  */
  75
  76 void dh_paramfree(dh_param *dp)
  77 {
  78   mp_drop(dp->p);
  79   mp_drop(dp->q);
  80   mp_drop(dp->g);
  81 }
  82
  83 void dh_pubfree(dh_pub *dp)
  84 {
  85   mp_drop(dp->dp.p);
  86   mp_drop(dp->dp.q);
  87   mp_drop(dp->dp.g);
  88   mp_drop(dp->y);
  89 }
  90
  91 void dh_privfree(dh_priv *dp)
  92 {
  93   mp_drop(dp->dp.p);
  94   mp_drop(dp->dp.q);
  95   mp_drop(dp->dp.g);
  96   mp_drop(dp->y);
  97   mp_drop(dp->x);
  98 }
  99
 100 /*----- That's all, folks -------------------------------------------------*/