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/*
* haval.c --
*
* Implements and registers message digest generator HAVAL.
*
*
* Copyright (c) 1996 Andreas Kupries (andreas_kupries@users.sourceforge.net)
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL I LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
* INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS
* SOFTWARE AND ITS DOCUMENTATION, EVEN IF I HAVE BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* I SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND
* I HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
* ENHANCEMENTS, OR MODIFICATIONS.
*
* CVS: $Id: haval.c,v 1.4 2000/08/09 19:13:17 aku Exp $
*/
#include "transformInt.h"
#include "haval-1.1/haval.h"
/*
* Generator description
* ---------------------
*
* The HAVAL alogrithm is used to compute a cryptographically strong
* message digest.
*/
#define DIGEST_SIZE (32)
#define CTX_TYPE haval_state
/*
* Declarations of internal procedures.
*/
static void MDHaval_Start _ANSI_ARGS_ ((VOID* context));
static void MDHaval_Update _ANSI_ARGS_ ((VOID* context, unsigned int character));
static void MDHaval_UpdateBuf _ANSI_ARGS_ ((VOID* context, unsigned char* buffer, int bufLen));
static void MDHaval_Final _ANSI_ARGS_ ((VOID* context, VOID* digest));
/*
* Generator definition.
*/
static Trf_MessageDigestDescription mdDescription = { /* THREADING: constant, read-only => safe */
"haval",
sizeof (CTX_TYPE),
DIGEST_SIZE,
MDHaval_Start,
MDHaval_Update,
MDHaval_UpdateBuf,
MDHaval_Final,
NULL
};
/*
*------------------------------------------------------*
*
* TrfInit_HAVAL --
*
* ------------------------------------------------*
* Register the generator implemented in this file.
* ------------------------------------------------*
*
* Sideeffects:
* As of 'Trf_Register'.
*
* Result:
* A standard Tcl error code.
*
*------------------------------------------------------*
*/
int
TrfInit_HAVAL (interp)
Tcl_Interp* interp;
{
return Trf_RegisterMessageDigest (interp, &mdDescription);
}
/*
*------------------------------------------------------*
*
* MDHaval_Start --
*
* ------------------------------------------------*
* Initialize the internal state of the message
* digest generator.
* ------------------------------------------------*
*
* Sideeffects:
* As of the called procedure.
*
* Result:
* None.
*
*------------------------------------------------------*
*/
static void
MDHaval_Start (context)
VOID* context;
{
haval_start ((CTX_TYPE*) context);
}
/*
*------------------------------------------------------*
*
* MDHaval_Update --
*
* ------------------------------------------------*
* Update the internal state of the message digest
* generator for a single character.
* ------------------------------------------------*
*
* Sideeffects:
* As of the called procedure.
*
* Result:
* None.
*
*------------------------------------------------------*
*/
static void
MDHaval_Update (context, character)
VOID* context;
unsigned int character;
{
unsigned char buf = character;
haval_hash ((CTX_TYPE*) context, &buf, 1);
}
/*
*------------------------------------------------------*
*
* MDHaval_UpdateBuf --
*
* ------------------------------------------------*
* Update the internal state of the message digest
* generator for a character buffer.
* ------------------------------------------------*
*
* Sideeffects:
* As of the called procedure.
*
* Result:
* None.
*
*------------------------------------------------------*
*/
static void
MDHaval_UpdateBuf (context, buffer, bufLen)
VOID* context;
unsigned char* buffer;
int bufLen;
{
haval_hash ((CTX_TYPE*) context, (unsigned char*) buffer, bufLen);
}
/*
*------------------------------------------------------*
*
* MDHaval_Final --
*
* ------------------------------------------------*
* Generate the digest from the internal state of
* the message digest generator.
* ------------------------------------------------*
*
* Sideeffects:
* As of the called procedure.
*
* Result:
* None.
*
*------------------------------------------------------*
*/
static void
MDHaval_Final (context, digest)
VOID* context;
VOID* digest;
{
haval_end ((CTX_TYPE*) context, (unsigned char*) digest);
}
/*
* External code from here on.
*/
#include "haval-1.1/haval.c" /* THREADING: import of one constant var, read-only => safe */
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