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