1/* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
10 */
11
12/**
13   @file gcm_reset.c
14   GCM implementation, reset a used state so it can accept IV data, by Tom St Denis
15*/
16#include "tomcrypt.h"
17
18#ifdef GCM_MODE
19
20/**
21  Reset a GCM state to as if you just called gcm_init().  This saves the initialization time.
22  @param gcm   The GCM state to reset
23  @return CRYPT_OK on success
24*/
25int gcm_reset(gcm_state *gcm)
26{
27   LTC_ARGCHK(gcm != NULL);
28
29   zeromem(gcm->buf, sizeof(gcm->buf));
30   zeromem(gcm->X,   sizeof(gcm->X));
31   gcm->mode     = GCM_MODE_IV;
32   gcm->ivmode   = 0;
33   gcm->buflen   = 0;
34   gcm->totlen   = 0;
35   gcm->pttotlen = 0;
36
37   return CRYPT_OK;
38}
39
40#endif
41
42/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_reset.c,v $ */
43/* $Revision: 1.4 $ */
44/* $Date: 2006/03/31 14:15:35 $ */
45