54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CRYPTO_SECURE_HASH_H_
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#define CRYPTO_SECURE_HASH_H_
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#include <stddef.h>
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#include "base/macros.h"
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#include "crypto/crypto_export.h"
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namespace base {
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class Pickle;
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class PickleIterator;
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}
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namespace crypto {
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// A wrapper to calculate secure hashes incrementally, allowing to
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// be used when the full input is not known in advance.
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class CRYPTO_EXPORT SecureHash {
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public:
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enum Algorithm {
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SHA256,
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};
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virtual ~SecureHash() {}
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static SecureHash* Create(Algorithm type);
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virtual void Update(const void* input, size_t len) = 0;
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virtual void Finish(void* output, size_t len) = 0;
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// Serialize the context, so it can be restored at a later time.
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// |pickle| will contain the serialized data.
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// Returns whether or not |pickle| was filled.
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virtual bool Serialize(base::Pickle* pickle) = 0;
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// Restore the context that was saved earlier.
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// |data_iterator| allows this to be used as part of a larger pickle.
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// |pickle| holds the saved data.
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// Returns success or failure.
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virtual bool Deserialize(base::PickleIterator* data_iterator) = 0;
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protected:
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SecureHash() {}
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private:
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DISALLOW_COPY_AND_ASSIGN(SecureHash);
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};
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} // namespace crypto
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#endif // CRYPTO_SECURE_HASH_H_
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