internal-sha256.h

Go to the documentation of this file.

/*
 * Copyright (C) 2021 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_SHA256_H
#define LW_INTERNAL_SHA256_H

#include "aead-metadata.h"
#include <stdint.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

#define SHA256_HASH_SIZE 32

typedef struct
{
    uint32_t h[8];      
    uint32_t w[16];     
    uint64_t length;    
    unsigned posn;      
} sha256_state_t;

extern aead_hash_algorithm_t const internal_sha256_hash_algorithm;

int internal_sha256_hash
    (unsigned char *out, const unsigned char *in, size_t inlen);

void internal_sha256_hash_init(sha256_state_t *state);

void internal_sha256_hash_update
    (sha256_state_t *state, const unsigned char *in, size_t inlen);

void internal_sha256_hash_finalize(sha256_state_t *state, unsigned char *out);

void internal_sha256_hmac
    (unsigned char *out,
     const unsigned char *key, size_t keylen,
     const unsigned char *in, size_t inlen);

void internal_sha256_hmac_init
    (sha256_state_t *state, const unsigned char *key, size_t keylen);

void internal_sha256_hmac_update
    (sha256_state_t *state, const unsigned char *in, size_t inlen);

void internal_sha256_hmac_finalize
    (sha256_state_t *state, const unsigned char *key, size_t keylen,
     unsigned char *out);

#ifdef __cplusplus
}
#endif

#endif