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/* $Id: sph_ripemd.h 216 2010-06-08 09:46:57Z tp $ */
/**
* RIPEMD, RIPEMD-128 and RIPEMD-160 interface.
*
* RIPEMD was first described in: Research and Development in Advanced
* Communication Technologies in Europe, "RIPE Integrity Primitives:
* Final Report of RACE Integrity Primitives Evaluation (R1040)", RACE,
* June 1992.
*
* A new, strengthened version, dubbed RIPEMD-160, was published in: H.
* Dobbertin, A. Bosselaers, and B. Preneel, "RIPEMD-160, a strengthened
* version of RIPEMD", Fast Software Encryption - FSE'96, LNCS 1039,
* Springer (1996), pp. 71--82.
*
* This article describes both RIPEMD-160, with a 160-bit output, and a
* reduced version called RIPEMD-128, which has a 128-bit output. RIPEMD-128
* was meant as a "drop-in" replacement for any hash function with 128-bit
* output, especially the original RIPEMD.
*
* @warning Collisions, and an efficient method to build other collisions,
* have been published for the original RIPEMD, which is thus considered as
* cryptographically broken. It is also very rarely encountered, and there
* seems to exist no free description or implementation of RIPEMD (except
* the sphlib code, of course). As of january 2007, RIPEMD-128 and RIPEMD-160
* seem as secure as their output length allows.
*
* ==========================(LICENSE BEGIN)============================
*
* Copyright (c) 2007-2010 Projet RNRT SAPHIR
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* ===========================(LICENSE END)=============================
*
* @file sph_ripemd.h
* @author Thomas Pornin <thomas.pornin@cryptolog.com>
*/
#ifndef SPH_RIPEMD_H__
#define SPH_RIPEMD_H__
#include <stddef.h>
#include "sph_types.h"
/**
* Output size (in bits) for RIPEMD.
*/
#define SPH_SIZE_ripemd 128
/**
* Output size (in bits) for RIPEMD-128.
*/
#define SPH_SIZE_ripemd128 128
/**
* Output size (in bits) for RIPEMD-160.
*/
#define SPH_SIZE_ripemd160 160
/**
* This structure is a context for RIPEMD computations: it contains the
* intermediate values and some data from the last entered block. Once
* a RIPEMD computation has been performed, the context can be reused for
* another computation.
*
* The contents of this structure are private. A running RIPEMD computation
* can be cloned by copying the context (e.g. with a simple
* <code>memcpy()</code>).
*/
typedef struct {
#ifndef DOXYGEN_IGNORE
unsigned char buf[64]; /* first field, for alignment */
sph_u32 val[4];
#if SPH_64
sph_u64 count;
#else
sph_u32 count_high, count_low;
#endif
#endif
} sph_ripemd_context;
/**
* Initialize a RIPEMD context. This process performs no memory allocation.
*
* @param cc the RIPEMD context (pointer to
* a <code>sph_ripemd_context</code>)
*/
void sph_ripemd_init(void *cc);
/**
* Process some data bytes. It is acceptable that <code>len</code> is zero
* (in which case this function does nothing).
*
* @param cc the RIPEMD context
* @param data the input data
* @param len the input data length (in bytes)
*/
void sph_ripemd(void *cc, const void *data, size_t len);
/**
* Terminate the current RIPEMD computation and output the result into the
* provided buffer. The destination buffer must be wide enough to
* accomodate the result (16 bytes). The context is automatically
* reinitialized.
*
* @param cc the RIPEMD context
* @param dst the destination buffer
*/
void sph_ripemd_close(void *cc, void *dst);
/**
* Apply the RIPEMD compression function on the provided data. The
* <code>msg</code> parameter contains the 16 32-bit input blocks,
* as numerical values (hence after the little-endian decoding). The
* <code>val</code> parameter contains the 5 32-bit input blocks for
* the compression function; the output is written in place in this
* array.
*
* @param msg the message block (16 values)
* @param val the function 128-bit input and output
*/
void sph_ripemd_comp(const sph_u32 msg[16], sph_u32 val[4]);
/* ===================================================================== */
/**
* This structure is a context for RIPEMD-128 computations: it contains the
* intermediate values and some data from the last entered block. Once
* a RIPEMD-128 computation has been performed, the context can be reused for
* another computation.
*
* The contents of this structure are private. A running RIPEMD-128 computation
* can be cloned by copying the context (e.g. with a simple
* <code>memcpy()</code>).
*/
typedef struct {
#ifndef DOXYGEN_IGNORE
unsigned char buf[64]; /* first field, for alignment */
sph_u32 val[4];
#if SPH_64
sph_u64 count;
#else
sph_u32 count_high, count_low;
#endif
#endif
} sph_ripemd128_context;
/**
* Initialize a RIPEMD-128 context. This process performs no memory allocation.
*
* @param cc the RIPEMD-128 context (pointer to
* a <code>sph_ripemd128_context</code>)
*/
void sph_ripemd128_init(void *cc);
/**
* Process some data bytes. It is acceptable that <code>len</code> is zero
* (in which case this function does nothing).
*
* @param cc the RIPEMD-128 context
* @param data the input data
* @param len the input data length (in bytes)
*/
void sph_ripemd128(void *cc, const void *data, size_t len);
/**
* Terminate the current RIPEMD-128 computation and output the result into the
* provided buffer. The destination buffer must be wide enough to
* accomodate the result (16 bytes). The context is automatically
* reinitialized.
*
* @param cc the RIPEMD-128 context
* @param dst the destination buffer
*/
void sph_ripemd128_close(void *cc, void *dst);
/**
* Apply the RIPEMD-128 compression function on the provided data. The
* <code>msg</code> parameter contains the 16 32-bit input blocks,
* as numerical values (hence after the little-endian decoding). The
* <code>val</code> parameter contains the 5 32-bit input blocks for
* the compression function; the output is written in place in this
* array.
*
* @param msg the message block (16 values)
* @param val the function 128-bit input and output
*/
void sph_ripemd128_comp(const sph_u32 msg[16], sph_u32 val[4]);
/* ===================================================================== */
/**
* This structure is a context for RIPEMD-160 computations: it contains the
* intermediate values and some data from the last entered block. Once
* a RIPEMD-160 computation has been performed, the context can be reused for
* another computation.
*
* The contents of this structure are private. A running RIPEMD-160 computation
* can be cloned by copying the context (e.g. with a simple
* <code>memcpy()</code>).
*/
typedef struct {
#ifndef DOXYGEN_IGNORE
unsigned char buf[64]; /* first field, for alignment */
sph_u32 val[5];
#if SPH_64
sph_u64 count;
#else
sph_u32 count_high, count_low;
#endif
#endif
} sph_ripemd160_context;
/**
* Initialize a RIPEMD-160 context. This process performs no memory allocation.
*
* @param cc the RIPEMD-160 context (pointer to
* a <code>sph_ripemd160_context</code>)
*/
void sph_ripemd160_init(void *cc);
/**
* Process some data bytes. It is acceptable that <code>len</code> is zero
* (in which case this function does nothing).
*
* @param cc the RIPEMD-160 context
* @param data the input data
* @param len the input data length (in bytes)
*/
void sph_ripemd160(void *cc, const void *data, size_t len);
/**
* Terminate the current RIPEMD-160 computation and output the result into the
* provided buffer. The destination buffer must be wide enough to
* accomodate the result (20 bytes). The context is automatically
* reinitialized.
*
* @param cc the RIPEMD-160 context
* @param dst the destination buffer
*/
void sph_ripemd160_close(void *cc, void *dst);
/**
* Apply the RIPEMD-160 compression function on the provided data. The
* <code>msg</code> parameter contains the 16 32-bit input blocks,
* as numerical values (hence after the little-endian decoding). The
* <code>val</code> parameter contains the 5 32-bit input blocks for
* the compression function; the output is written in place in this
* array.
*
* @param msg the message block (16 values)
* @param val the function 160-bit input and output
*/
void sph_ripemd160_comp(const sph_u32 msg[16], sph_u32 val[5]);
#endif