view src/encauth/gcm/gcm_reset.c @ 280:59400faa4b44 libtomcrypt-orig libtomcrypt-1.05

Re-import libtomcrypt 1.05 for cleaner propagating. From crypt-1.05.tar.bz2, SHA1 of 88250202bb51570dc64f7e8f1c943cda9479258f
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 12:58:00 +0000
parents
children d5faf4814ddb
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, [email protected], http://libtomcrypt.org
 */

/**
   @file gcm_reset.c
   GCM implementation, reset a used state so it can accept IV data, by Tom St Denis
*/
#include "tomcrypt.h"

#ifdef GCM_MODE

/**
  Reset a GCM state to as if you just called gcm_init().  This saves the initialization time.
  @param gcm   The GCM state to reset
  @return CRYPT_OK on success
*/
int gcm_reset(gcm_state *gcm)
{
   LTC_ARGCHK(gcm != NULL);

   zeromem(gcm->buf, sizeof(gcm->buf));
   zeromem(gcm->X,   sizeof(gcm->X));
   gcm->mode     = GCM_MODE_IV;
   gcm->ivmode   = 0;
   gcm->buflen   = 0;
   gcm->totlen   = 0;
   gcm->pttotlen = 0;
  
   return CRYPT_OK;
}

#endif

/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_reset.c,v $ */
/* $Revision: 1.3 $ */
/* $Date: 2005/05/05 14:35:58 $ */