chromium/crypto/hmac.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Utility class for calculating the HMAC for a given message. We currently only
// support SHA-1 and SHA-256 for the hash algorithm, but this can be extended
// easily. Prefer the base::span and std::vector overloads over the
// std::string_view and std::string overloads.

#ifndef CRYPTO_HMAC_H_
#define CRYPTO_HMAC_H_

#include <stddef.h>

#include <memory>
#include <string_view>
#include <vector>

#include "base/containers/span.h"
#include "crypto/crypto_export.h"

namespace crypto {

// Simplify the interface and reduce includes by abstracting out the internals.
class SymmetricKey;

class CRYPTO_EXPORT HMAC { … };

}  // namespace crypto

#endif  // CRYPTO_HMAC_H_