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/* Copyright 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
/* SHA-256 functions */
#ifndef __CROS_EC_SHA256_H
#define __CROS_EC_SHA256_H
#include "common.h"
#define SHA256_DIGEST_SIZE 32
#define SHA256_BLOCK_SIZE 64
/* SHA256 context */
struct sha256_ctx {
uint32_t h[8];
uint32_t tot_len;
uint32_t len;
uint8_t block[2 * SHA256_BLOCK_SIZE];
uint8_t buf[SHA256_DIGEST_SIZE]; /* Used to store the final digest. */
void SHA256_init(struct sha256_ctx *ctx);
void SHA256_update(struct sha256_ctx *ctx, const uint8_t *data, uint32_t len);
uint8_t *SHA256_final(struct sha256_ctx *ctx);
void hmac_SHA256(uint8_t *output, const uint8_t *key, const int key_len,
const uint8_t *message, const int message_len);
#endif /* __CROS_EC_SHA256_H */