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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
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
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