Rearrange the file tree.

[u/mdw/catacomb] / sha.h

diff --git a/sha.h b/sha.h
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-/* -*-c-*-
- *
- * $Id: sha.h,v 1.6 2004/04/08 01:36:15 mdw Exp $
- *
- * Implementation of the SHA-1 hash 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.
- */
-
-/*----- Notes on the SHA-1 hash function ----------------------------------*
- *
- * SHA (Secure Hash Algorithm) was designed by the NSA, for use with the
- * Digital Signature Algorithm.  It is defined by FIPS 180-1.  It has gained
- * wide acceptance since its initial publication, and is probably now most
- * people's collision-resistant function of choice.  The author prefers
- * RIPEMD-160, for no particularly good reasons.
- */
-
-#ifndef CATACOMB_SHA_H
-#define CATACOMB_SHA_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <mLib/bits.h>
-
-#ifndef CATACOMB_GHASH_H
-#  include "ghash.h"
-#endif
-
-/*----- Magic numbers -----------------------------------------------------*/
-
-#define SHA_BUFSZ 64
-#define SHA_HASHSZ 20
-#define SHA_STATESZ 20
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct sha_ctx {
-  uint32 a, b, c, d, e;                        /* Chaining variables */
-  uint32 nl, nh;                       /* Byte count so far */
-  unsigned off;                                /* Offset into buffer */
-  octet buf[SHA_BUFSZ];                        /* Accumulation buffer */
-} sha_ctx;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @sha_compress@ --- *
- *
- * Arguments:  @sha_ctx *ctx@ = pointer to context block
- *             @const void *sbuf@ = pointer to buffer of appropriate size
- *
- * Returns:    ---
- *
- * Use:                SHA compression function.
- */
-
-extern void sha_compress(sha_ctx */*ctx*/, const void */*sbuf*/);
-
-/* --- @sha_init@ --- *
- *
- * Arguments:  @sha_ctx *ctx@ = pointer to context block to initialize
- *
- * Returns:    ---
- *
- * Use:                Initializes a context block ready for hashing.
- */
-
-extern void sha_init(sha_ctx */*ctx*/);
-
-/* --- @sha_set@ --- *
- *
- * Arguments:  @sha_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.
- */
-
-extern void sha_set(sha_ctx */*ctx*/, const void */*buf*/,
-                   unsigned long /*count*/);
-
-/* --- @sha_hash@ --- *
- *
- * Arguments:  @sha_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.
- */
-
-extern void sha_hash(sha_ctx */*ctx*/, const void */*buf*/, size_t /*sz*/);
-
-/* --- @sha_done@ --- *
- *
- * Arguments:  @sha_ctx *ctx@ = pointer to context block
- *             @void *hash@ = pointer to output buffer
- *
- * Returns:    ---
- *
- * Use:                Returns the hash of the data read so far.
- */
-
-extern void sha_done(sha_ctx */*ctx*/, void */*hash*/);
-
-/* --- @sha_state@ --- *
- *
- * Arguments:  @sha_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 @sha_set@.
- */
-
-extern unsigned long sha_state(sha_ctx */*ctx*/, void */*state*/);
-
-/*----- Generic hash interface --------------------------------------------*/
-
-extern const gchash sha;
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif