Mercurial > dropbear
comparison libtomcrypt/src/mac/pmac/pmac_shift_xor.c @ 330:5488db2e9e4e
merge of 332f709a4cb39cde4cedab7c3be89e05f3023067
and ca4ca78b82c5d430c69ce01bf794e8886ce81431
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sat, 10 Jun 2006 16:39:40 +0000 |
| parents | 1b9e69c058d2 |
| children | 0cbe8f6dbf9e |
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| 329:8ed0dce45126 | 330:5488db2e9e4e |
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| 1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis | |
| 2 * | |
| 3 * LibTomCrypt is a library that provides various cryptographic | |
| 4 * algorithms in a highly modular and flexible manner. | |
| 5 * | |
| 6 * The library is free for all purposes without any express | |
| 7 * guarantee it works. | |
| 8 * | |
| 9 * Tom St Denis, [email protected], http://libtomcrypt.org | |
| 10 */ | |
| 11 #include "tomcrypt.h" | |
| 12 | |
| 13 /** | |
| 14 @file pmac_shift_xor.c | |
| 15 PMAC implementation, internal function, by Tom St Denis | |
| 16 */ | |
| 17 | |
| 18 #ifdef PMAC | |
| 19 | |
| 20 /** | |
| 21 Internal function. Performs the state update (adding correct multiple) | |
| 22 @param pmac The PMAC state. | |
| 23 */ | |
| 24 void pmac_shift_xor(pmac_state *pmac) | |
| 25 { | |
| 26 int x, y; | |
| 27 y = pmac_ntz(pmac->block_index++); | |
| 28 #ifdef LTC_FAST | |
| 29 for (x = 0; x < pmac->block_len; x += sizeof(LTC_FAST_TYPE)) { | |
| 30 *((LTC_FAST_TYPE*)((unsigned char *)pmac->Li + x)) ^= | |
| 31 *((LTC_FAST_TYPE*)((unsigned char *)pmac->Ls[y] + x)); | |
| 32 } | |
| 33 #else | |
| 34 for (x = 0; x < pmac->block_len; x++) { | |
| 35 pmac->Li[x] ^= pmac->Ls[y][x]; | |
| 36 } | |
| 37 #endif | |
| 38 } | |
| 39 | |
| 40 #endif | |
| 41 | |
| 42 /* $Source: /cvs/libtom/libtomcrypt/src/mac/pmac/pmac_shift_xor.c,v $ */ | |
| 43 /* $Revision: 1.4 $ */ | |
| 44 /* $Date: 2005/05/05 14:35:59 $ */ |