/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
/**
@file gcm_reset.c
GCM implementation, reset a used state so it can accept IV data, by Tom St Denis
*/
#include "tomcrypt_private.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