Source/modules/crypto/CryptoOperation.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * notice, this list of conditions and the following disclaimer.
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#ifndef CryptoOperation_h
#define CryptoOperation_h

#include "bindings/v8/ScriptObject.h"
#include "bindings/v8/ScriptWrappable.h"
#include "modules/crypto/Algorithm.h"
#include "public/platform/WebCrypto.h"
#include "public/platform/WebCryptoAlgorithm.h"
#include "wtf/Forward.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"

namespace WebCore {

class ScriptPromiseResolver;
class ExceptionState;

class CryptoOperation : public ScriptWrappable, public WebKit::WebCryptoOperationResult, public RefCounted<CryptoOperation> {
public:
    ~CryptoOperation();
    static PassRefPtr<CryptoOperation> create(const WebKit::WebCryptoAlgorithm&, ExceptionState*);

    CryptoOperation* process(ArrayBuffer* data);
    CryptoOperation* process(ArrayBufferView* data);

    ScriptObject finish();
    ScriptObject abort();

    Algorithm* algorithm();

    // Implementation of WebKit::WebCryptoOperationResult.
    virtual void initializationFailed() OVERRIDE;
    virtual void initializationSucceded(WebKit::WebCryptoOperation*) OVERRIDE;
    virtual void completeWithError() OVERRIDE;
    virtual void completeWithArrayBuffer(const WebKit::WebArrayBuffer&) OVERRIDE;

private:
    enum State {
        // Constructing the WebCryptoOperation.
        Initializing,

        // Accepting calls to process().
        Processing,

        // finish() has been called, but the Promise has not been resolved yet.
        Finishing,

        // The operation either:
        //  - completed successfully
        //  - failed
        //  - was aborted
        Done,
    };

    CryptoOperation(const WebKit::WebCryptoAlgorithm&, ExceptionState*);

    void process(const unsigned char*, size_t);

    // Aborts and clears m_impl. If the operation has already comleted then
    // returns false.
    bool abortImpl();

    ScriptPromiseResolver* promiseResolver();

    WebKit::WebCryptoAlgorithm m_algorithm;
    WebKit::WebCryptoOperation* m_impl;
    RefPtr<Algorithm> m_algorithmNode;
    State m_state;

    RefPtr<ScriptPromiseResolver> m_promiseResolver;

    ExceptionState* m_exceptionState;
};

} // namespace WebCore

#endif