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137 lines
4.6 KiB
C
137 lines
4.6 KiB
C
/*-
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* Copyright 2005 Colin Percival
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* Copyright 2013 Christian Mehlis & René Kijewski
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* Copyright 2016 Martin Landsmann <martin.landsmann@haw-hamburg.de>
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* Copyright 2016 OTA keys S.A.
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* Copyright 2020 HAW Hamburg
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/lib/libmd/sha256.h,v 1.1.2.1 2005/06/24 13:32:25 cperciva Exp $
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*/
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/**
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* @defgroup sys_hashes_sha2xx_common SHA-2xx common
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* @ingroup sys_hashes_unkeyed
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* @brief Implementation of common functionality for SHA-224/256 hashing functions
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* @{
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*
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* @file
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* @brief Common definitions for the SHA-224/256 hash functions
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*
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* @author Colin Percival
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* @author Christian Mehlis
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* @author Rene Kijewski
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* @author Hermann Lelong
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* @author Peter Kietzmann
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*/
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#ifndef HASHES_SHA2XX_COMMON_H
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#define HASHES_SHA2XX_COMMON_H
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#include <string.h>
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#include <stdint.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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* @brief Structure to hold the SHA-2XX context.
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*/
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typedef struct {
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/** global state */
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uint32_t state[8];
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/** processed bytes counter */
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uint32_t count[2];
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/** data buffer */
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unsigned char buf[64];
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} sha2xx_context_t;
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/**
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* @brief Elementary functions used by SHA2XX
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* @{
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*/
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#define Ch(x, y, z) ((x & (y ^ z)) ^ z)
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#define Maj(x, y, z) ((x & (y | z)) | (y & z))
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#define SHR(x, n) (x >> n)
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#define ROTR(x, n) ((x >> n) | (x << (32 - n)))
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#define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
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#define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
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#define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
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#define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
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/** @} */
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/** @brief SHA-224 and SHA-256 Constants */
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static const uint32_t K[64] = {
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
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0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
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0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
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0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
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0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
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0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
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0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
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0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
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0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
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};
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/**
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* @brief SHA-2XX initialization. Begins a SHA-2XX operation.
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*
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* @param ctx sha2xx_context_t handle to init
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*/
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void sha2xx_pad(sha2xx_context_t *ctx);
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/**
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* @brief Add bytes into the hash
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*
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* @param ctx sha2xx_context_t handle to use
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* @param[in] data Input data
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* @param[in] len Length of @p data
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*/
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void sha2xx_update(sha2xx_context_t *ctx, const void *data, size_t len);
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/**
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* @brief SHA-2XX finalization. Pads the input data, exports the hash value,
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* and clears the context state.
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*
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* @param ctx sha2xx_context_t handle to use
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* @param digest resulting digest, this is the hash of all the bytes
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* @param dig_len Length of @p digest
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*/
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void sha2xx_final(sha2xx_context_t *ctx, void *digest, size_t dig_len);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* HASHES_SHA2XX_COMMON_H */
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