view libtomcrypt/src/encauth/gcm/gcm_reset.c @ 1534:ed930fd6f60f

Added the -G option to allow logins only for users that are members of a certain group. This allows finer control of an instance on who can and cannot login over a certain instance (e.g. password and not key). Needs double-checking and ensuring it meets platform requirements.
author stellarpower <stellarpower@googlemail.com>
date Tue, 20 Feb 2018 02:11:55 +0000
parents 6dba84798cd5
children
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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.
 */

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

#ifdef LTC_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     = LTC_GCM_MODE_IV;
   gcm->ivmode   = 0;
   gcm->buflen   = 0;
   gcm->totlen   = 0;
   gcm->pttotlen = 0;

   return CRYPT_OK;
}

#endif

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