// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COBALT_SRC_LIB_CRYPTO_UTIL_HASH_H_
#define COBALT_SRC_LIB_CRYPTO_UTIL_HASH_H_

#include <cstddef>

#include "src/lib/crypto_util/types.h"

namespace cobalt {

namespace crypto {

namespace hash {

static const size_t DIGEST_SIZE = 32;  // SHA-256 outputs 32 bytes.

// Computes the SHA256 digest of |data_len| bytes from |data| and writes the
// result to |out| which must have length |DIGEST_SIZE|.
//
// Returns true for success or false for failure.
bool Hash(const byte *data, size_t data_len, byte out[DIGEST_SIZE]);

}  // namespace hash

}  // namespace crypto

}  // namespace cobalt
#endif  // COBALT_SRC_LIB_CRYPTO_UTIL_HASH_H_