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// Copyright (c) 2012 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_SECURE_HASH_H_
#define CRYPTO_SECURE_HASH_H_
#include "base/basictypes.h"
#include "crypto/crypto_export.h"
class Pickle;
class PickleIterator;
namespace crypto {
// A wrapper to calculate secure hashes incrementally, allowing to
// be used when the full input is not known in advance.
class CRYPTO_EXPORT SecureHash {
public:
enum Algorithm {
SHA256,
};
virtual ~SecureHash() {}
static SecureHash* Create(Algorithm type);
virtual void Update(const void* input, size_t len) = 0;
virtual void Finish(void* output, size_t len) = 0;
// Serialize the context, so it can be restored at a later time.
// |pickle| will contain the serialized data.
// Returns whether or not |pickle| was filled.
virtual bool Serialize(Pickle* pickle) = 0;
// Restore the context that was saved earlier.
// |data_iterator| allows this to be used as part of a larger pickle.
// |pickle| holds the saved data.
// Returns success or failure.
virtual bool Deserialize(PickleIterator* data_iterator) = 0;
protected:
SecureHash() {}
private:
DISALLOW_COPY_AND_ASSIGN(SecureHash);
};
} // namespace crypto
#endif // CRYPTO_SECURE_HASH_H_
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