Mercurial > dropbear
comparison ocb_shift_xor.c @ 3:7faae8f46238 libtomcrypt-orig
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| author | Matt Johnston <matt@ucc.asn.au> |
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| date | Mon, 31 May 2004 18:25:41 +0000 |
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| children |
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| -1:000000000000 | 3:7faae8f46238 |
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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 /* OCB Implementation by Tom St Denis */ | |
| 13 #include "mycrypt.h" | |
| 14 | |
| 15 #ifdef OCB_MODE | |
| 16 | |
| 17 void ocb_shift_xor(ocb_state *ocb, unsigned char *Z) | |
| 18 { | |
| 19 int x, y; | |
| 20 y = ocb_ntz(ocb->block_index++); | |
| 21 for (x = 0; x < ocb->block_len; x++) { | |
| 22 ocb->Li[x] ^= ocb->Ls[y][x]; | |
| 23 Z[x] = ocb->Li[x] ^ ocb->R[x]; | |
| 24 } | |
| 25 } | |
| 26 | |
| 27 #endif |