Mercurial > dropbear
comparison libtomcrypt/src/encauth/ocb/ocb_shift_xor.c @ 297:79bf1023cf11 agent-client
propagate from branch 'au.asn.ucc.matt.dropbear' (head 0501e6f661b5415eb76f3b312d183c3adfbfb712)
to branch 'au.asn.ucc.matt.dropbear.cli-agent' (head 01038174ec27245b51bd43a66c01ad930880f67b)
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Tue, 21 Mar 2006 16:20:59 +0000 |
| parents | 1b9e69c058d2 |
| children | 0cbe8f6dbf9e |
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| 225:ca7e76d981d9 | 297:79bf1023cf11 |
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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 | |
| 12 /** | |
| 13 @file ocb_shift_xor.c | |
| 14 OCB implementation, internal function, by Tom St Denis | |
| 15 */ | |
| 16 #include "tomcrypt.h" | |
| 17 | |
| 18 #ifdef OCB_MODE | |
| 19 | |
| 20 /** | |
| 21 Compute the shift/xor for OCB (internal function) | |
| 22 @param ocb The OCB state | |
| 23 @param Z The destination of the shift | |
| 24 */ | |
| 25 void ocb_shift_xor(ocb_state *ocb, unsigned char *Z) | |
| 26 { | |
| 27 int x, y; | |
| 28 y = ocb_ntz(ocb->block_index++); | |
| 29 for (x = 0; x < ocb->block_len; x++) { | |
| 30 ocb->Li[x] ^= ocb->Ls[y][x]; | |
| 31 Z[x] = ocb->Li[x] ^ ocb->R[x]; | |
| 32 } | |
| 33 } | |
| 34 | |
| 35 #endif | |
| 36 | |
| 37 /* $Source: /cvs/libtom/libtomcrypt/src/encauth/ocb/ocb_shift_xor.c,v $ */ | |
| 38 /* $Revision: 1.3 $ */ | |
| 39 /* $Date: 2005/05/05 14:35:58 $ */ |