+++ /dev/null
-/* -*-c-*-
- *
- * $Id: md5.c,v 1.4 2004/04/08 01:36:15 mdw Exp $
- *
- * The MD5 message digest function
- *
- * (c) 1998 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 "md5.h"
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @md5_compress@ --- *
- *
- * Arguments: @md5_ctx *ctx@ = pointer to context block
- * @const void *sbuf@ = pointer to buffer of appropriate size
- *
- * Returns: ---
- *
- * Use: MD5 compression function.
- */
-
-void md5_compress(md5_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) & (z)) | ((y) & ~(z)))
-#define H(x, y, z) ((x) ^ (y) ^ (z))
-#define I(x, y, z) ((y) ^ ((x) | ~(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) + x; \
-} while (0)
-
-#define FF(w, x, y, z, i, r, k) T(w, x, y, z, i, r, k, F)
-#define GG(w, x, y, z, i, r, k) T(w, x, y, z, i, r, k, G)
-#define HH(w, x, y, z, i, r, k) T(w, x, y, z, i, r, k, H)
-#define II(w, x, y, z, i, r, k) T(w, x, y, z, i, r, k, I)
-
- /* --- The main compression function --- */
-
- FF(a, b, c, d, 0, 7, 0xd76aa478);
- FF(d, a, b, c, 1, 12, 0xe8c7b756);
- FF(c, d, a, b, 2, 17, 0x242070db);
- FF(b, c, d, a, 3, 22, 0xc1bdceee);
- FF(a, b, c, d, 4, 7, 0xf57c0faf);
- FF(d, a, b, c, 5, 12, 0x4787c62a);
- FF(c, d, a, b, 6, 17, 0xa8304613);
- FF(b, c, d, a, 7, 22, 0xfd469501);
- FF(a, b, c, d, 8, 7, 0x698098d8);
- FF(d, a, b, c, 9, 12, 0x8b44f7af);
- FF(c, d, a, b, 10, 17, 0xffff5bb1);
- FF(b, c, d, a, 11, 22, 0x895cd7be);
- FF(a, b, c, d, 12, 7, 0x6b901122);
- FF(d, a, b, c, 13, 12, 0xfd987193);
- FF(c, d, a, b, 14, 17, 0xa679438e);
- FF(b, c, d, a, 15, 22, 0x49b40821);
-
- GG(a, b, c, d, 1, 5, 0xf61e2562);
- GG(d, a, b, c, 6, 9, 0xc040b340);
- GG(c, d, a, b, 11, 14, 0x265e5a51);
- GG(b, c, d, a, 0, 20, 0xe9b6c7aa);
- GG(a, b, c, d, 5, 5, 0xd62f105d);
- GG(d, a, b, c, 10, 9, 0x02441453);
- GG(c, d, a, b, 15, 14, 0xd8a1e681);
- GG(b, c, d, a, 4, 20, 0xe7d3fbc8);
- GG(a, b, c, d, 9, 5, 0x21e1cde6);
- GG(d, a, b, c, 14, 9, 0xc33707d6);
- GG(c, d, a, b, 3, 14, 0xf4d50d87);
- GG(b, c, d, a, 8, 20, 0x455a14ed);
- GG(a, b, c, d, 13, 5, 0xa9e3e905);
- GG(d, a, b, c, 2, 9, 0xfcefa3f8);
- GG(c, d, a, b, 7, 14, 0x676f02d9);
- GG(b, c, d, a, 12, 20, 0x8d2a4c8a);
-
- HH(a, b, c, d, 5, 4, 0xfffa3942);
- HH(d, a, b, c, 8, 11, 0x8771f681);
- HH(c, d, a, b, 11, 16, 0x6d9d6122);
- HH(b, c, d, a, 14, 23, 0xfde5380c);
- HH(a, b, c, d, 1, 4, 0xa4beea44);
- HH(d, a, b, c, 4, 11, 0x4bdecfa9);
- HH(c, d, a, b, 7, 16, 0xf6bb4b60);
- HH(b, c, d, a, 10, 23, 0xbebfbc70);
- HH(a, b, c, d, 13, 4, 0x289b7ec6);
- HH(d, a, b, c, 0, 11, 0xeaa127fa);
- HH(c, d, a, b, 3, 16, 0xd4ef3085);
- HH(b, c, d, a, 6, 23, 0x04881d05);
- HH(a, b, c, d, 9, 4, 0xd9d4d039);
- HH(d, a, b, c, 12, 11, 0xe6db99e5);
- HH(c, d, a, b, 15, 16, 0x1fa27cf8);
- HH(b, c, d, a, 2, 23, 0xc4ac5665);
-
- II(a, b, c, d, 0, 6, 0xf4292244);
- II(d, a, b, c, 7, 10, 0x432aff97);
- II(c, d, a, b, 14, 15, 0xab9423a7);
- II(b, c, d, a, 5, 21, 0xfc93a039);
- II(a, b, c, d, 12, 6, 0x655b59c3);
- II(d, a, b, c, 3, 10, 0x8f0ccc92);
- II(c, d, a, b, 10, 15, 0xffeff47d);
- II(b, c, d, a, 1, 21, 0x85845dd1);
- II(a, b, c, d, 8, 6, 0x6fa87e4f);
- II(d, a, b, c, 15, 10, 0xfe2ce6e0);
- II(c, d, a, b, 6, 15, 0xa3014314);
- II(b, c, d, a, 13, 21, 0x4e0811a1);
- II(a, b, c, d, 4, 6, 0xf7537e82);
- II(d, a, b, c, 11, 10, 0xbd3af235);
- II(c, d, a, b, 2, 15, 0x2ad7d2bb);
- II(b, c, d, a, 9, 21, 0xeb86d391);
-
- /* --- Update the chaining variables --- */
-
- ctx->a += a;
- ctx->b += b;
- ctx->c += c;
- ctx->d += d;
-}
-
-/* --- @md5_init@ --- *
- *
- * Arguments: @md5_ctx *ctx@ = pointer to context block to initialize
- *
- * Returns: ---
- *
- * Use: Initializes a context block ready for hashing.
- */
-
-void md5_init(md5_ctx *ctx)
-{
- ctx->a = 0x67452301;
- ctx->b = 0xefcdab89;
- ctx->c = 0x98badcfe;
- ctx->d = 0x10325476;
- ctx->off = 0;
- ctx->nl = ctx->nh = 0;
-}
-
-/* --- @md5_set@ --- *
- *
- * Arguments: @md5_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 md5_set(md5_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);
-}
-
-/* --- @md5_hash@ --- *
- *
- * Arguments: @md5_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 md5_hash(md5_ctx *ctx, const void *buf, size_t sz)
-{
- HASH_BUFFER(MD5, md5, ctx, buf, sz);
-}
-
-/* --- @md5_done@ --- *
- *
- * Arguments: @md5_ctx *ctx@ = pointer to context block
- * @void *hash@ = pointer to output buffer
- *
- * Returns: ---
- *
- * Use: Returns the hash of the data read so far.
- */
-
-void md5_done(md5_ctx *ctx, void *hash)
-{
- octet *p = hash;
- HASH_MD5STRENGTH(MD5, md5, 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);
-}
-
-/* --- @md5_state@ --- *
- *
- * Arguments: @md5_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 @md5_set@.
- */
-
-unsigned long md5_state(md5_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(MD5, md5)
-
-/* --- Test code --- */
-
-HASH_TEST(MD5, md5)
-
-/*----- That's all, folks -------------------------------------------------*/
projects / u / mdw / catacomb / blobdiff