Mercurial > dropbear
annotate libtomcrypt/src/mac/pmac/pmac_shift_xor.c @ 758:1c607a62d235 ecc
Set LTC_SOURCE for proper ltm_desc etc
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 29 Mar 2013 00:26:46 +0800 (2013-03-28) |
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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, tomstdenis@gmail.com, http://libtomcrypt.com |
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10 */ |
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11 #include "tomcrypt.h" |
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12 |
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13 /** |
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14 @file pmac_shift_xor.c |
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15 PMAC implementation, internal function, by Tom St Denis |
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16 */ |
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17 |
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18 #ifdef LTC_PMAC |
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19 |
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20 /** |
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21 Internal function. Performs the state update (adding correct multiple) |
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22 @param pmac The PMAC state. |
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23 */ |
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24 void pmac_shift_xor(pmac_state *pmac) |
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25 { |
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26 int x, y; |
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27 y = pmac_ntz(pmac->block_index++); |
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28 #ifdef LTC_FAST |
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29 for (x = 0; x < pmac->block_len; x += sizeof(LTC_FAST_TYPE)) { |
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30 *((LTC_FAST_TYPE*)((unsigned char *)pmac->Li + x)) ^= |
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31 *((LTC_FAST_TYPE*)((unsigned char *)pmac->Ls[y] + x)); |
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32 } |
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33 #else |
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34 for (x = 0; x < pmac->block_len; x++) { |
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35 pmac->Li[x] ^= pmac->Ls[y][x]; |
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36 } |
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37 #endif |
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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/mac/pmac/pmac_shift_xor.c,v $ */ |
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43 /* $Revision: 1.6 $ */ |
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44 /* $Date: 2006/11/03 00:39:49 $ */ |