+++ /dev/null
-/* -*-c-*-
- *
- * $Id: md4.c,v 1.4 2004/04/08 01:36:15 mdw Exp $
- *
- * The MD4 message digest function
- *
- * (c) 1999 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.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <mLib/bits.h>
-
-#include "ghash.h"
-#include "ghash-def.h"
-#include "hash.h"
-#include "md4.h"
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @md4_compress@ --- *
- *
- * Arguments: @md4_ctx *ctx@ = pointer to context block
- * @const void *sbuf@ = pointer to buffer of appropriate size
- *
- * Returns: ---
- *
- * Use: RIPEMD-160 compression function.
- */
-
-void md4_compress(md4_ctx *ctx, const void *sbuf)
-{
- uint32 a, b, c, d;
- uint32 buf[16];
-
- /* --- Fetch the chaining variables --- */
-
- a = ctx->a;
- b = ctx->b;
- c = ctx->c;
- d = ctx->d;
-
- /* --- Fetch the buffer contents --- */
-
- {
- int i;
- const octet *p;
-
- for (i = 0, p = sbuf; i < 16; i++, p += 4)
- buf[i] = LOAD32_L(p);
- }
-
- /* --- Definitions for round functions --- */
-
-#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
-#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
-#define H(x, y, z) ((x) ^ (y) ^ (z))
-
-#define T(w, x, y, z, i, r, k, f) do { \
- uint32 _t = w + f(x, y, z) + buf[i] + k; \
- w = ROL32(_t, r); \
-} while (0)
-
-#define FF(w, x, y, z, i, r) T(w, x, y, z, i, r, 0x00000000, F)
-#define GG(w, x, y, z, i, r) T(w, x, y, z, i, r, 0x5a827999, G)
-#define HH(w, x, y, z, i, r) T(w, x, y, z, i, r, 0x6ed9eba1, H)
-
- /* --- The main compression function --- */
-
- FF(a, b, c, d, 0, 3);
- FF(d, a, b, c, 1, 7);
- FF(c, d, a, b, 2, 11);
- FF(b, c, d, a, 3, 19);
- FF(a, b, c, d, 4, 3);
- FF(d, a, b, c, 5, 7);
- FF(c, d, a, b, 6, 11);
- FF(b, c, d, a, 7, 19);
- FF(a, b, c, d, 8, 3);
- FF(d, a, b, c, 9, 7);
- FF(c, d, a, b, 10, 11);
- FF(b, c, d, a, 11, 19);
- FF(a, b, c, d, 12, 3);
- FF(d, a, b, c, 13, 7);
- FF(c, d, a, b, 14, 11);
- FF(b, c, d, a, 15, 19);
-
- GG(a, b, c, d, 0, 3);
- GG(d, a, b, c, 4, 5);
- GG(c, d, a, b, 8, 9);
- GG(b, c, d, a, 12, 13);
- GG(a, b, c, d, 1, 3);
- GG(d, a, b, c, 5, 5);
- GG(c, d, a, b, 9, 9);
- GG(b, c, d, a, 13, 13);
- GG(a, b, c, d, 2, 3);
- GG(d, a, b, c, 6, 5);
- GG(c, d, a, b, 10, 9);
- GG(b, c, d, a, 14, 13);
- GG(a, b, c, d, 3, 3);
- GG(d, a, b, c, 7, 5);
- GG(c, d, a, b, 11, 9);
- GG(b, c, d, a, 15, 13);
-
- HH(a, b, c, d, 0, 3);
- HH(d, a, b, c, 8, 9);
- HH(c, d, a, b, 4, 11);
- HH(b, c, d, a, 12, 15);
- HH(a, b, c, d, 2, 3);
- HH(d, a, b, c, 10, 9);
- HH(c, d, a, b, 6, 11);
- HH(b, c, d, a, 14, 15);
- HH(a, b, c, d, 1, 3);
- HH(d, a, b, c, 9, 9);
- HH(c, d, a, b, 5, 11);
- HH(b, c, d, a, 13, 15);
- HH(a, b, c, d, 3, 3);
- HH(d, a, b, c, 11, 9);
- HH(c, d, a, b, 7, 11);
- HH(b, c, d, a, 15, 15);
-
- /* --- Update the chaining variables --- */
-
- ctx->a += a;
- ctx->b += b;
- ctx->c += c;
- ctx->d += d;
-}
-
-/* --- @md4_init@ --- *
- *
- * Arguments: @md4_ctx *ctx@ = pointer to context block to initialize
- *
- * Returns: ---
- *
- * Use: Initializes a context block ready for hashing.
- */
-
-void md4_init(md4_ctx *ctx)
-{
- ctx->a = 0x67452301;
- ctx->b = 0xefcdab89;
- ctx->c = 0x98badcfe;
- ctx->d = 0x10325476;
- ctx->off = 0;
- ctx->nl = ctx->nh = 0;
-}
-
-/* --- @md4_set@ --- *
- *
- * Arguments: @md4_ctx *ctx@ = pointer to context block
- * @const void *buf@ = pointer to state buffer
- * @unsigned long count@ = current count of bytes processed
- *
- * Returns: ---
- *
- * Use: Initializes a context block from a given state. This is
- * useful in cases where the initial hash state is meant to be
- * secret, e.g., for NMAC and HMAC support.
- */
-
-void md4_set(md4_ctx *ctx, const void *buf, unsigned long count)
-{
- const octet *p = buf;
- ctx->a = LOAD32_L(p + 0);
- ctx->b = LOAD32_L(p + 4);
- ctx->c = LOAD32_L(p + 8);
- ctx->d = LOAD32_L(p + 12);
- ctx->off = 0;
- ctx->nl = U32(count);
- ctx->nh = U32(((count & ~MASK32) >> 16) >> 16);
-}
-
-/* --- @md4_hash@ --- *
- *
- * Arguments: @md4_ctx *ctx@ = pointer to context block
- * @const void *buf@ = buffer of data to hash
- * @size_t sz@ = size of buffer to hash
- *
- * Returns: ---
- *
- * Use: Hashes a buffer of data. The buffer may be of any size and
- * alignment.
- */
-
-void md4_hash(md4_ctx *ctx, const void *buf, size_t sz)
-{
- HASH_BUFFER(MD4, md4, ctx, buf, sz);
-}
-
-/* --- @md4_done@ --- *
- *
- * Arguments: @md4_ctx *ctx@ = pointer to context block
- * @void *hash@ = pointer to output buffer
- *
- * Returns: ---
- *
- * Use: Returns the hash of the data read so far.
- */
-
-void md4_done(md4_ctx *ctx, void *hash)
-{
- octet *p = hash;
- HASH_MD5STRENGTH(MD4, md4, ctx);
- STORE32_L(p + 0, ctx->a);
- STORE32_L(p + 4, ctx->b);
- STORE32_L(p + 8, ctx->c);
- STORE32_L(p + 12, ctx->d);
-}
-
-/* --- @md4_state@ --- *
- *
- * Arguments: @md4_ctx *ctx@ = pointer to context
- * @void *state@ = pointer to buffer for current state
- *
- * Returns: Number of bytes written to the hash function so far.
- *
- * Use: Returns the current state of the hash function such that
- * it can be passed to @md4_set@.
- */
-
-unsigned long md4_state(md4_ctx *ctx, void *state)
-{
- octet *p = state;
- STORE32_L(p + 0, ctx->a);
- STORE32_L(p + 4, ctx->b);
- STORE32_L(p + 8, ctx->c);
- STORE32_L(p + 12, ctx->d);
- return (ctx->nl | ((ctx->nh >> 16) >> 16));
-}
-
-/* --- Generic interface --- */
-
-GHASH_DEF(MD4, md4)
-
-/* --- Test rig --- */
-
-HASH_TEST(MD4, md4)
-
-/*----- That's all, folks -------------------------------------------------*/
projects / u / mdw / catacomb / blobdiff