internal-spook.h

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/*
 * Copyright (C) 2020 Southern Storm Software, Pty Ltd.
 *
 * 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.
 */

#ifndef LW_INTERNAL_SPOOK_H
#define LW_INTERNAL_SPOOK_H

#include "internal-util.h"

#ifdef __cplusplus
extern "C" {
#endif

#define CLYDE128_BLOCK_SIZE 16

#define CLYDE128_KEY_SIZE 16

#define CLYDE128_TWEAK_SIZE 16

#define CLYDE128_STEPS 6

#define SHADOW512_STATE_SIZE 64

#define SHADOW512_RATE 32

#define SHADOW384_STATE_SIZE 48

#define SHADOW384_RATE 16

typedef union
{
    uint32_t W[SHADOW512_STATE_SIZE / 4];   
    uint8_t B[SHADOW512_STATE_SIZE];        
} shadow512_state_t;

typedef union
{
    uint32_t W[SHADOW384_STATE_SIZE / 4];   
    uint8_t B[SHADOW384_STATE_SIZE];        
} shadow384_state_t;

void clyde128_encrypt(const unsigned char key[CLYDE128_KEY_SIZE],
                      uint32_t output[CLYDE128_BLOCK_SIZE / 4],
                      const uint32_t input[CLYDE128_BLOCK_SIZE / 4],
                      const uint32_t tweak[CLYDE128_TWEAK_SIZE / 4]);

void clyde128_decrypt(const unsigned char key[CLYDE128_KEY_SIZE],
                      uint32_t output[CLYDE128_BLOCK_SIZE / 4],
                      const unsigned char input[CLYDE128_BLOCK_SIZE],
                      const uint32_t tweak[CLYDE128_TWEAK_SIZE / 4]);

void clyde128_encrypt_masked(const unsigned char key[CLYDE128_KEY_SIZE],
                             uint32_t output[CLYDE128_BLOCK_SIZE / 4],
                             const uint32_t input[CLYDE128_BLOCK_SIZE / 4],
                             const uint32_t tweak[CLYDE128_TWEAK_SIZE / 4]);

void clyde128_decrypt_masked(const unsigned char key[CLYDE128_KEY_SIZE],
                             uint32_t output[CLYDE128_BLOCK_SIZE / 4],
                             const unsigned char input[CLYDE128_BLOCK_SIZE],
                             const uint32_t tweak[CLYDE128_TWEAK_SIZE / 4]);

void shadow512(shadow512_state_t *state);

void shadow384(shadow384_state_t *state);

#ifdef __cplusplus
}
#endif

#endif