--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: tiger.c,v 1.1 2000/07/15 10:02:43 mdw Exp $
+ *
+ * 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.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: tiger.c,v $
+ * Revision 1.1 2000/07/15 10:02:43 mdw
+ * Anderson and Biham's Tiger hash function added.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <mLib/bits.h>
+
+#include "ghash-def.h"
+#include "hash.h"
+#include "tiger.h"
+#include "tiger-tab.h"
+#include "tiger-base.h"
+
+/*----- S-boxes -----------------------------------------------------------*/
+
+static const kludge64 s[4][256] = TIGER_S;
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @tiger_compress@ --- *
+ *
+ * Arguments: @tiger_ctx *ctx@ = pointer to context block
+ * @const void *sbuf@ = pointer to buffer of appropriate size
+ *
+ * Returns: ---
+ *
+ * Use: Tiger compression function.
+ */
+
+void tiger_compress(tiger_ctx *ctx, const void *sbuf)
+{
+ kludge64 x[8];
+ int i;
+ const octet *p;
+ for (i = 0, p = sbuf; i < 8; i++, p += 8)
+ LOAD64_L_(x[i], p);
+ TIGER_CORE(ctx->a, ctx->b, ctx->c, x);
+}
+
+/* --- @tiger_init@ --- *
+ *
+ * Arguments: @tiger_ctx *ctx@ = pointer to context block to initialize
+ *
+ * Returns: ---
+ *
+ * Use: Initializes a context block ready for hashing.
+ */
+
+void tiger_init(tiger_ctx *ctx)
+{
+ SET64(ctx->a, 0x01234567, 0x89abcdef);
+ SET64(ctx->b, 0xfedcba98, 0x76543210);
+ SET64(ctx->c, 0xf096a5b4, 0xc3b2e187);
+ ctx->off = 0;
+ ctx->nl = ctx->nh = 0;
+}
+
+/* --- @tiger_set@ --- *
+ *
+ * Arguments: @tiger_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 tiger_set(tiger_ctx *ctx, const void *buf, unsigned long count)
+{
+ const octet *p = buf;
+ LOAD64_L_(ctx->a, p + 0);
+ LOAD64_L_(ctx->b, p + 8);
+ LOAD64_L_(ctx->c, p + 16);
+ ctx->off = 0;
+ ctx->nl = U32(count);
+ ctx->nh = U32(((count & ~MASK32) >> 16) >> 16);
+}
+
+/* --- @tiger_hash@ --- *
+ *
+ * Arguments: @tiger_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 tiger_hash(tiger_ctx *ctx, const void *buf, size_t sz)
+{
+ HASH_BUFFER(TIGER, tiger, ctx, buf, sz);
+}
+
+/* --- @tiger_done@ --- *
+ *
+ * Arguments: @tiger_ctx *ctx@ = pointer to context block
+ * @void *hash@ = pointer to output buffer
+ *
+ * Returns: ---
+ *
+ * Use: Returns the hash of the data read so far.
+ */
+
+void tiger_done(tiger_ctx *ctx, void *hash)
+{
+ octet *p = hash;
+ HASH_PAD(TIGER, tiger, ctx, 0x01u, 0, 8);
+ STORE32_L(ctx->buf + TIGER_BUFSZ - 8, ctx->nl << 3);
+ STORE32_L(ctx->buf + TIGER_BUFSZ - 4, (ctx->nl >> 29) | (ctx->nh << 3));
+ tiger_compress(ctx, ctx->buf);
+ STORE64_L_(p + 0, ctx->a);
+ STORE64_L_(p + 8, ctx->b);
+ STORE64_L_(p + 16, ctx->c);
+}
+
+/* --- @tiger_state@ --- *
+ *
+ * Arguments: @tiger_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 @tiger_set@.
+ */
+
+unsigned long tiger_state(tiger_ctx *ctx, void *state)
+{
+ octet *p = state;
+ STORE64_L_(p + 0, ctx->a);
+ STORE64_L_(p + 8, ctx->b);
+ STORE64_L_(p + 16, ctx->c);
+ return (ctx->nl | ((ctx->nh << 16) << 16));
+}
+
+/* --- Generic interface --- */
+
+GHASH_DEF(TIGER, tiger)
+
+/* --- Test code --- */
+
+HASH_TEST(TIGER, tiger)
+
+/*----- That's all, folks -------------------------------------------------*/