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trezor-firmware/crypto/groestl.h

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/* Groestl hash from https://github.com/Groestlcoin/vanitygen
* Trezor adaptation by Yura Pakhuchiy <pakhuchiy@gmail.com>. */
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/**
* 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 GROESTL_H__
#define GROESTL_H__
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#include <stddef.h>
/**
* 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 {
unsigned char buf[128]; /* first field, for alignment */
size_t ptr;
union {
uint64_t wide[16];
uint32_t narrow[32];
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} state;
uint64_t count;
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} sph_groestl_big_context;
typedef sph_groestl_big_context GROESTL512_CTX;
/**
* Initialize a Groestl-512 context. This process performs no memory allocation.
*
* @param cc the Groestl-512 context (pointer to a
* <code>GROESTL512_CTX</code>)
*/
void 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 groestl512_Update(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 groestl512_Final(void *cc, void *dst);
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/* Calculate double Groestl-512 hash and truncate it to 256-bits. */
void groestl512_DoubleTrunc(void *cc, void *dst);
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#endif