Mercurial > dropbear

annotate src/encauth/gcm/gcm_reset.c @ 192:9cc34777b479 libtomcrypt

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propagate from branch 'au.asn.ucc.matt.ltc-orig' (head 9ba8f01f44320e9cb9f19881105ae84f84a43ea9) to branch 'au.asn.ucc.matt.dropbear.ltc' (head dbf51c569bc34956ad948e4cc87a0eeb2170b768)
author Matt Johnston <matt@ucc.asn.au>
date Sun, 08 May 2005 06:36:47 +0000
parents 1c15b283127b
children 39d5d58461d6
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1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
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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