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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 WebCryptoKey_h
#define WebCryptoKey_h
#include "WebCommon.h"
#include "WebPrivatePtr.h"
namespace blink {
enum WebCryptoKeyType {
WebCryptoKeyTypeSecret,
WebCryptoKeyTypePublic,
WebCryptoKeyTypePrivate,
};
enum WebCryptoKeyUsage {
WebCryptoKeyUsageEncrypt = 1 << 0,
WebCryptoKeyUsageDecrypt = 1 << 1,
WebCryptoKeyUsageSign = 1 << 2,
WebCryptoKeyUsageVerify = 1 << 3,
WebCryptoKeyUsageDeriveKey = 1 << 4,
WebCryptoKeyUsageWrapKey = 1 << 5,
WebCryptoKeyUsageUnwrapKey = 1 << 6,
#if INSIDE_BLINK
EndOfWebCryptoKeyUsage,
#endif
};
// A bitfield of WebCryptoKeyUsage
typedef int WebCryptoKeyUsageMask;
enum WebCryptoKeyFormat {
WebCryptoKeyFormatRaw,
WebCryptoKeyFormatPkcs8,
WebCryptoKeyFormatSpki,
WebCryptoKeyFormatJwk,
};
class WebCryptoAlgorithm;
class WebCryptoKeyPrivate;
class WebCryptoKeyHandle;
// The WebCryptoKey represents a key from the Web Crypto API:
//
// https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#key-interface
//
// WebCryptoKey is just a reference-counted wrapper that manages the lifetime of
// a "WebCryptoKeyHandle*".
//
// WebCryptoKey is:
// * Copiable (cheaply)
// * Threadsafe if the embedder's WebCryptoKeyHandle is also threadsafe.
//
// The embedder is responsible for creating all WebCryptoKeys, and therefore can
// safely assume any details regarding the type of the wrapped
// WebCryptoKeyHandle*.
//
// If WebCryptoKey "isNull()" then it is invalid to call any of the other
// methods on it (other than destruction, assignment, or isNull()).
//
// FIXME: Define the interface to use for structured clone.
// Cloning across a process boundary will need serialization,
// however cloning for in-process workers could just share the same
// (threadsafe) handle.
class WebCryptoKey {
public:
~WebCryptoKey() { reset(); }
WebCryptoKey(const WebCryptoKey& other) { assign(other); }
WebCryptoKey& operator=(const WebCryptoKey& other)
{
assign(other);
return *this;
}
// For an explanation of these parameters see:
// https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#key-interface-members
//
// Note that the caller is passing ownership of the WebCryptoKeyHandle*.
BLINK_PLATFORM_EXPORT static WebCryptoKey create(WebCryptoKeyHandle*, WebCryptoKeyType, bool extractable, const WebCryptoAlgorithm&, WebCryptoKeyUsageMask);
BLINK_PLATFORM_EXPORT static WebCryptoKey createNull();
// Returns the opaque key handle that was set by the embedder.
// * Safe to downcast to known type (since embedder creates all the keys)
// * Returned pointer's lifetime is bound to |this|
BLINK_PLATFORM_EXPORT WebCryptoKeyHandle* handle() const;
BLINK_PLATFORM_EXPORT WebCryptoKeyType type() const;
BLINK_PLATFORM_EXPORT bool extractable() const;
BLINK_PLATFORM_EXPORT const WebCryptoAlgorithm& algorithm() const;
BLINK_PLATFORM_EXPORT WebCryptoKeyUsageMask usages() const;
BLINK_PLATFORM_EXPORT bool isNull() const;
private:
WebCryptoKey() { }
BLINK_PLATFORM_EXPORT void assign(const WebCryptoKey& other);
BLINK_PLATFORM_EXPORT void reset();
WebPrivatePtr<WebCryptoKeyPrivate> m_private;
};
// Base class for the embedder to define its own opaque key handle. The lifetime
// of this object is controlled by WebCryptoKey using reference counting.
class WebCryptoKeyHandle {
public:
virtual ~WebCryptoKeyHandle() { }
};
} // namespace blink
#endif
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