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// Copyright (c) 2013 The Chromium 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 CRYPTO_HKDF_H_
#define CRYPTO_HKDF_H_
#include <stddef.h>
#include <string>
#include "base/strings/string_piece.h"
#include "crypto/crypto_export.h"
namespace crypto {
CRYPTO_EXPORT
std::string HkdfSha256(base::StringPiece secret,
base::StringPiece salt,
base::StringPiece info,
size_t derived_key_size);
} // namespace crypto
#endif // CRYPTO_HKDF_H_