+++ /dev/null
-/* -*-c-*-
- *
- * $Id: tiger-base.h,v 1.2 2004/04/08 01:36:15 mdw Exp $
- *
- * Common definitions for the Tiger hash function
- *
- * (c) 2000 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * Catacomb is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with Catacomb; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-#ifndef CATACOMB_TIGER_BASE_H
-#define CATACOMB_TIGER_BASE_H
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <mLib/bits.h>
-
-/*----- Macros provided ---------------------------------------------------*/
-
-/* --- The guts of a single round --- */
-
-#define TIGER_ROUND(a, b, c, x, n, op) do { \
- kludge64 _t; \
- XOR64(c, c, x); \
- _t = s[0][U8(LO64(c) >> 0)]; \
- XOR64(_t, _t, s[1][U8(LO64(c) >> 16)]); \
- XOR64(_t, _t, s[2][U8(HI64(c) >> 0)]); \
- XOR64(_t, _t, s[3][U8(HI64(c) >> 16)]); \
- SUB64(a, a, _t); \
- _t = s[3][U8(LO64(c) >> 8)]; \
- XOR64(_t, _t, s[2][U8(LO64(c) >> 24)]); \
- XOR64(_t, _t, s[1][U8(HI64(c) >> 8)]); \
- XOR64(_t, _t, s[0][U8(HI64(c) >> 24)]); \
- ADD64(b, b, _t); \
- LSL64_(_t, b, n); \
- op##64(b, _t, b); \
-} while (0)
-
-/* --- One pass over the buffer --- */
-
-#define TIGER_PASS(a, b, c, x, n, op) do { \
- TIGER_ROUND(a, b, c, x[0], n, op); \
- TIGER_ROUND(b, c, a, x[1], n, op); \
- TIGER_ROUND(c, a, b, x[2], n, op); \
- TIGER_ROUND(a, b, c, x[3], n, op); \
- TIGER_ROUND(b, c, a, x[4], n, op); \
- TIGER_ROUND(c, a, b, x[5], n, op); \
- TIGER_ROUND(a, b, c, x[6], n, op); \
- TIGER_ROUND(b, c, a, x[7], n, op); \
-} while (0)
-
-/* --- A step in the `key schedule' --- */
-
-#define TIGER_KSTEP(a, b, c, d, op, n) do { \
- kludge64 _u; \
- XOR64(b, b, a); \
- ADD64(c, c, b); \
- CPL64(_u, b); op##64_(_u, _u, n); XOR64(_u, _u, c); SUB64(d, d, _u); \
-} while (0)
-
-/* --- The `key schedule' -- mangle the buffer --- */
-
-#define TIGER_KSCHED(x) do { \
- kludge64 _t; \
- \
- SET64(_t, 0xa5a5a5a5, 0xa5a5a5a5); \
- XOR64(_t, _t, x[7]); SUB64(x[0], x[0], _t); \
- TIGER_KSTEP(x[0], x[1], x[2], x[3], LSL, 19); \
- TIGER_KSTEP(x[3], x[4], x[5], x[6], LSR, 23); \
- TIGER_KSTEP(x[6], x[7], x[0], x[1], LSL, 19); \
- TIGER_KSTEP(x[1], x[2], x[3], x[4], LSR, 23); \
- XOR64(x[5], x[5], x[4]); \
- ADD64(x[6], x[6], x[5]); \
- SET64(_t, 0x01234567, 0x89abcdef); \
- XOR64(_t, _t, x[6]); SUB64(x[7], x[7], _t); \
-} while (0)
-
-/* --- The Tiger compression function --- */
-
-#define TIGER_CORE(a, b, c, x) do { \
- kludge64 _a, _b, _c; \
- _a = a, _b = b, _c = c; \
- TIGER_PASS(_a, _b, _c, x, 2, ADD); \
- TIGER_KSCHED(x); \
- TIGER_PASS(_c, _a, _b, x, 3, SUB); \
- TIGER_KSCHED(x); \
- TIGER_PASS(_b, _c, _a, x, 3, ADD); \
- XOR64(a, _a, a); SUB64(b, _b, b); ADD64(c, _c, c); \
-} while (0)
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif
~mdw / catacomb / blobdiff