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comparison libtomcrypt/src/encauth/gcm/gcm_reset.c @ 285:1b9e69c058d2

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propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
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281:997e6f7dc01e 285:1b9e69c058d2
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, [email protected], http://libtomcrypt.org
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 */
25 int 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: 1.3 $ */
44 /* $Date: 2005/05/05 14:35:58 $ */