Mercurial > dropbear

annotate 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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children 0cbe8f6dbf9e
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285
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 *
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9 * Tom St Denis, [email protected], http://libtomcrypt.org
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10 */
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11
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12 /**
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13 @file gcm_reset.c
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14 GCM implementation, reset a used state so it can accept IV data, by Tom St Denis
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15 */
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16 #include "tomcrypt.h"
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17
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18 #ifdef GCM_MODE
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19
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20 /**
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21 Reset a GCM state to as if you just called gcm_init(). This saves the initialization time.
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22 @param gcm The GCM state to reset
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23 @return CRYPT_OK on success
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24 */
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25 int gcm_reset(gcm_state *gcm)
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26 {
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27 LTC_ARGCHK(gcm != NULL);
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28
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29 zeromem(gcm->buf, sizeof(gcm->buf));
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30 zeromem(gcm->X, sizeof(gcm->X));
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31 gcm->mode = GCM_MODE_IV;
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32 gcm->ivmode = 0;
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33 gcm->buflen = 0;
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34 gcm->totlen = 0;
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35 gcm->pttotlen = 0;
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36
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37 return CRYPT_OK;
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38 }
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39
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40 #endif
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41
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42 /* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_reset.c,v $ */
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43 /* $Revision: 1.3 $ */
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44 /* $Date: 2005/05/05 14:35:58 $ */