Mercurial > dropbear

annotate libtomcrypt/src/encauth/ocb/ocb_shift_xor.c @ 1471:6dba84798cd5

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Update to libtomcrypt 1.18.1, merged with Dropbear changes
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 21:44:05 +0800
parents f849a5ca2efc
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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9
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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10 /**
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11 @file ocb_shift_xor.c
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12 OCB implementation, internal function, by Tom St Denis
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13 */
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14 #include "tomcrypt.h"
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f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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16 #ifdef LTC_OCB_MODE
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18 /**
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19 Compute the shift/xor for OCB (internal function)
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20 @param ocb The OCB state
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21 @param Z The destination of the shift
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22 */
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23 void ocb_shift_xor(ocb_state *ocb, unsigned char *Z)
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24 {
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25 int x, y;
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26 y = ocb_ntz(ocb->block_index++);
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27 for (x = 0; x < ocb->block_len; x++) {
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28 ocb->Li[x] ^= ocb->Ls[y][x];
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29 Z[x] = ocb->Li[x] ^ ocb->R[x];
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30 }
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31 }
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33 #endif
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34
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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35 /* ref: $Format:%D$ */
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36 /* git commit: $Format:%H$ */
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37 /* commit time: $Format:%ai$ */