Mercurial > dropbear
annotate libtomcrypt/src/encauth/ocb/ocb_shift_xor.c @ 652:17962b2a6b8f
- Make sure we don't use channel-specific data after it has been freed
with a ChanType->closehandler()
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 04 Dec 2011 05:27:29 +0800 (2011-12-03) |
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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 |
285
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10 */ |
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11 |
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12 /** |
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13 @file ocb_shift_xor.c |
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14 OCB implementation, internal function, 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 OCB_MODE |
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19 |
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20 /** |
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21 Compute the shift/xor for OCB (internal function) |
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22 @param ocb The OCB state |
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23 @param Z The destination of the shift |
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24 */ |
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25 void ocb_shift_xor(ocb_state *ocb, unsigned char *Z) |
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26 { |
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27 int x, y; |
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28 y = ocb_ntz(ocb->block_index++); |
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29 for (x = 0; x < ocb->block_len; x++) { |
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30 ocb->Li[x] ^= ocb->Ls[y][x]; |
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31 Z[x] = ocb->Li[x] ^ ocb->R[x]; |
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32 } |
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33 } |
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34 |
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35 #endif |
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36 |
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37 /* $Source: /cvs/libtom/libtomcrypt/src/encauth/ocb/ocb_shift_xor.c,v $ */ |
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38 /* $Revision: 1.4 $ */ |
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39 /* $Date: 2006/03/31 14:15:35 $ */ |