X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ba6e6b64033b1f9de49feccb5c9cd438354481f7..0f00dc4c8eb47e67bc0f148c2dd109f73a451e0a:/md4.c diff --git a/md4.c b/md4.c deleted file mode 100644 index 5d43817..0000000 --- a/md4.c +++ /dev/null @@ -1,259 +0,0 @@ -/* -*-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 - -#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 -------------------------------------------------*/