view libtomcrypt/src/encauth/gcm/gcm_reset.c @ 384:a05fb340a95d

propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head ffd1015238ffcc959f6cd95176d96fcd0945a397) to branch 'au.asn.ucc.matt.dropbear' (head 52ccb0ad0587a62bc64aecb939adbb76546aac16)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 03:05:30 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
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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.com
 */

/**
   @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: 1.4 $ */
/* $Date: 2006/03/31 14:15:35 $ */