comparison src/mac/pmac/pmac_shift_xor.c @ 280:59400faa4b44 libtomcrypt-orig libtomcrypt-1.05

Re-import libtomcrypt 1.05 for cleaner propagating. From crypt-1.05.tar.bz2, SHA1 of 88250202bb51570dc64f7e8f1c943cda9479258f
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 12:58:00 +0000
parents
children d5faf4814ddb
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equal deleted inserted replaced
-1:000000000000 280:59400faa4b44
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 $ */