Mercurial > dropbear

annotate libtomcrypt/src/encauth/gcm/gcm_reset.c @ 1754:064f5be2fc45

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Add buf_decrpos()
author Matt Johnston <matt@ucc.asn.au>
date Sat, 24 Oct 2020 18:56:45 +0800
parents 6dba84798cd5
children
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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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10 /**
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11 @file gcm_reset.c
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12 GCM implementation, reset a used state so it can accept IV data, by Tom St Denis
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13 */
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14 #include "tomcrypt.h"
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16 #ifdef LTC_GCM_MODE
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18 /**
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19 Reset a GCM state to as if you just called gcm_init(). This saves the initialization time.
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20 @param gcm The GCM state to reset
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21 @return CRYPT_OK on success
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22 */
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23 int gcm_reset(gcm_state *gcm)
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24 {
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25 LTC_ARGCHK(gcm != NULL);
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27 zeromem(gcm->buf, sizeof(gcm->buf));
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28 zeromem(gcm->X, sizeof(gcm->X));
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29 gcm->mode = LTC_GCM_MODE_IV;
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30 gcm->ivmode = 0;
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31 gcm->buflen = 0;
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32 gcm->totlen = 0;
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33 gcm->pttotlen = 0;
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35 return CRYPT_OK;
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36 }
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38 #endif
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39
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40 /* ref: $Format:%D$ */
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41 /* git commit: $Format:%H$ */
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42 /* commit time: $Format:%ai$ */