--- /dev/null
+/* -*-c-*-
+ *
+ * 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