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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CryptoResultImpl_h
#define CryptoResultImpl_h
#include "bindings/core/v8/ScriptPromise.h"
#include "core/dom/ExceptionCode.h"
#include "modules/ModulesExport.h"
#include "platform/CryptoResult.h"
#include "public/platform/WebCrypto.h"
#include "wtf/Forward.h"
namespace blink {
MODULES_EXPORT ExceptionCode webCryptoErrorToExceptionCode(WebCryptoErrorType);
// Wrapper around a Promise to notify completion of the crypto operation.
//
// The thread on which CryptoResultImpl was created on is referred to as the
// "origin thread".
//
// * At creation time there must be an active ExecutionContext.
// * All methods of the CryptoResult implementation must be called from
// the origin thread. The exception is that destruction may happen on
// another thread.
// * One of the completeWith***() functions must be called, or the
// m_resolver will be leaked until the ExecutionContext is destroyed.
class MODULES_EXPORT CryptoResultImpl final : public CryptoResult {
public:
static CryptoResultImpl* create(ScriptState*);
~CryptoResultImpl();
void completeWithError(WebCryptoErrorType, const WebString&) override;
void completeWithBuffer(const void* bytes, unsigned bytesSize) override;
void completeWithJson(const char* utf8Data, unsigned length) override;
void completeWithBoolean(bool) override;
void completeWithKey(const WebCryptoKey&) override;
void completeWithKeyPair(const WebCryptoKey& publicKey,
const WebCryptoKey& privateKey) override;
// If called after completion (including cancellation) will return an empty
// ScriptPromise.
ScriptPromise promise();
WebCryptoResult result() { return WebCryptoResult(this, m_cancel.get()); }
DECLARE_VIRTUAL_TRACE();
private:
class Resolver;
class ResultCancel : public CryptoResultCancel {
public:
static PassRefPtr<ResultCancel> create() {
return adoptRef(new ResultCancel);
}
bool cancelled() const override;
void cancel();
private:
ResultCancel();
int m_cancelled;
};
explicit CryptoResultImpl(ScriptState*);
void cancel();
void clearResolver();
Member<Resolver> m_resolver;
// Separately communicate cancellation to WebCryptoResults so as to
// allow this result object, which will be on the Oilpan heap, to be
// GCed and destructed as needed. That is, it may end being GCed while
// the thread owning the heap is detached and shut down, which will
// in some cases happen before corresponding webcrypto operations have
// all been processed. Hence these webcrypto operations cannot reliably
// check cancellation status via this result object. So, keep a separate
// cancellation status object for the purpose, which will outlive the
// result object and can be safely accessed by multiple threads.
RefPtr<ResultCancel> m_cancel;
};
} // namespace blink
#endif // CryptoResultImpl_h
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