/* $Id: sph_groestl.h 216 2010-06-08 09:46:57Z tp $ */
/**
* Groestl interface. This code implements Groestl with the recommended
* parameters for SHA-3, with outputs of 224, 256, 384 and 512 bits.
*
* ==========================(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_groestl.h
* @author Thomas Pornin <thomas.pornin@cryptolog.com>
*/
#ifndef SPH_GROESTL_H__
#define SPH_GROESTL_H__
#include <stddef.h>
#include "sph_types.h"
/**
* Output size (in bits) for Groestl-224.
*/
#define SPH_SIZE_groestl224 224
/**
* Output size (in bits) for Groestl-256.
*/
#define SPH_SIZE_groestl256 256
/**
* Output size (in bits) for Groestl-384.
*/
#define SPH_SIZE_groestl384 384
/**
* Output size (in bits) for Groestl-512.
*/
#define SPH_SIZE_groestl512 512
/**
* This structure is a context for Groestl-224 and Groestl-256 computations:
* it contains the intermediate values and some data from the last
* entered block. Once a Groestl computation has been performed, the
* context can be reused for another computation.
*
* The contents of this structure are private. A running Groestl
* 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 */
size_t ptr;
union {
#if SPH_64
sph_u64 wide[8];
#endif
sph_u32 narrow[16];
} state;
#if SPH_64
sph_u64 count;
#else
sph_u32 count_high, count_low;
#endif
#endif
} sph_groestl_small_context;
/**
* This structure is a context for Groestl-224 computations. It is
* identical to the common <code>sph_groestl_small_context</code>.
*/
typedef sph_groestl_small_context sph_groestl224_context;
/**
* This structure is a context for Groestl-256 computations. It is
* identical to the common <code>sph_groestl_small_context</code>.
*/
typedef sph_groestl_small_context sph_groestl256_context;
/**
* This structure is a context for Groestl-384 and Groestl-512 computations:
* it contains the intermediate values and some data from the last
* entered block. Once a Groestl computation has been performed, the
* context can be reused for another computation.
*
* The contents of this structure are private. A running Groestl
* computation can be cloned by copying the context (e.g. with a simple
* <code>memcpy()</code>).
*/
typedef struct {
#ifndef DOXYGEN_IGNORE
unsigned char buf[128]; /* first field, for alignment */
size_t ptr;
union {
#if SPH_64
sph_u64 wide[16];
#endif
sph_u32 narrow[32];
} state;
#if SPH_64
sph_u64 count;
#else
sph_u32 count_high, count_low;
#endif
#endif
} sph_groestl_big_context;
/**
* This structure is a context for Groestl-384 computations. It is
* identical to the common <code>sph_groestl_small_context</code>.
*/
typedef sph_groestl_big_context sph_groestl384_context;
/**
* This structure is a context for Groestl-512 computations. It is
* identical to the common <code>sph_groestl_small_context</code>.
*/
typedef sph_groestl_big_context sph_groestl512_context;
/**
* Initialize a Groestl-224 context. This process performs no memory allocation.
*
* @param cc the Groestl-224 context (pointer to a
* <code>sph_groestl224_context</code>)
*/
void sph_groestl224_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 Groestl-224 context
* @param data the input data
* @param len the input data length (in bytes)
*/
void sph_groestl224(void *cc, const void *data, size_t len);
/**
* Terminate the current Groestl-224 computation and output the result into
* the provided buffer. The destination buffer must be wide enough to
* accomodate the result (28 bytes). The context is automatically
* reinitialized.
*
* @param cc the Groestl-224 context
* @param dst the destination buffer
*/
void sph_groestl224_close(void *cc, void *dst);
/**
* Add a few additional bits (0 to 7) to the current computation, then
* terminate it and output the result in the provided buffer, which must
* be wide enough to accomodate the result (28 bytes). If bit number i
* in <code>ub</code> has value 2^i, then the extra bits are those
* numbered 7 downto 8-n (this is the big-endian convention at the byte
* level). The context is automatically reinitialized.
*
* @param cc the Groestl-224 context
* @param ub the extra bits
* @param n the number of extra bits (0 to 7)
* @param dst the destination buffer
*/
void sph_groestl224_addbits_and_close(
void *cc, unsigned ub, unsigned n, void *dst);
/**
* Initialize a Groestl-256 context. This process performs no memory allocation.
*
* @param cc the Groestl-256 context (pointer to a
* <code>sph_groestl256_context</code>)
*/
void sph_groestl256_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 Groestl-256 context
* @param data the input data
* @param len the input data length (in bytes)
*/
void sph_groestl256(void *cc, const void *data, size_t len);
/**
* Terminate the current Groestl-256 computation and output the result into
* the provided buffer. The destination buffer must be wide enough to
* accomodate the result (32 bytes). The context is automatically
* reinitialized.
*
* @param cc the Groestl-256 context
* @param dst the destination buffer
*/
void sph_groestl256_close(void *cc, void *dst);
/**
* Add a few additional bits (0 to 7) to the current computation, then
* terminate it and output the result in the provided buffer, which must
* be wide enough to accomodate the result (32 bytes). If bit number i
* in <code>ub</code> has value 2^i, then the extra bits are those
* numbered 7 downto 8-n (this is the big-endian convention at the byte
* level). The context is automatically reinitialized.
*
* @param cc the Groestl-256 context
* @param ub the extra bits
* @param n the number of extra bits (0 to 7)
* @param dst the destination buffer
*/
void sph_groestl256_addbits_and_close(
void *cc, unsigned ub, unsigned n, void *dst);
/**
* Initialize a Groestl-384 context. This process performs no memory allocation.
*
* @param cc the Groestl-384 context (pointer to a
* <code>sph_groestl384_context</code>)
*/
void sph_groestl384_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 Groestl-384 context
* @param data the input data
* @param len the input data length (in bytes)
*/
void sph_groestl384(void *cc, const void *data, size_t len);
/**
* Terminate the current Groestl-384 computation and output the result into
* the provided buffer. The destination buffer must be wide enough to
* accomodate the result (48 bytes). The context is automatically
* reinitialized.
*
* @param cc the Groestl-384 context
* @param dst the destination buffer
*/
void sph_groestl384_close(void *cc, void *dst);
/**
* Add a few additional bits (0 to 7) to the current computation, then
* terminate it and output the result in the provided buffer, which must
* be wide enough to accomodate the result (48 bytes). If bit number i
* in <code>ub</code> has value 2^i, then the extra bits are those
* numbered 7 downto 8-n (this is the big-endian convention at the byte
* level). The context is automatically reinitialized.
*
* @param cc the Groestl-384 context
* @param ub the extra bits
* @param n the number of extra bits (0 to 7)
* @param dst the destination buffer
*/
void sph_groestl384_addbits_and_close(
void *cc, unsigned ub, unsigned n, void *dst);
/**
* Initialize a Groestl-512 context. This process performs no memory allocation.
*
* @param cc the Groestl-512 context (pointer to a
* <code>sph_groestl512_context</code>)
*/
void sph_groestl512_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 Groestl-512 context
* @param data the input data
* @param len the input data length (in bytes)
*/
void sph_groestl512(void *cc, const void *data, size_t len);
/**
* Terminate the current Groestl-512 computation and output the result into
* the provided buffer. The destination buffer must be wide enough to
* accomodate the result (64 bytes). The context is automatically
* reinitialized.
*
* @param cc the Groestl-512 context
* @param dst the destination buffer
*/
void sph_groestl512_close(void *cc, void *dst);
/**
* Add a few additional bits (0 to 7) to the current computation, then
* terminate it and output the result in the provided buffer, which must
* be wide enough to accomodate the result (64 bytes). If bit number i
* in <code>ub</code> has value 2^i, then the extra bits are those
* numbered 7 downto 8-n (this is the big-endian convention at the byte
* level). The context is automatically reinitialized.
*
* @param cc the Groestl-512 context
* @param ub the extra bits
* @param n the number of extra bits (0 to 7)
* @param dst the destination buffer
*/
void sph_groestl512_addbits_and_close(
void *cc, unsigned ub, unsigned n, void *dst);
#endif