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/*
* Copyright (C) 2021 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#pragma once
#include <optional>
#if HAVE(TASK_IDENTITY_TOKEN)
#include <wtf/MachSendRight.h>
#else
#include <variant>
#endif
namespace WebCore {
// Object to access proof of process identity.
// ProcessIdentifier identifies a process.
// ProcessIdentity grants access to the identity.
// Empty ProcessIdentity does not do anything.
class ProcessIdentity {
public:
// Creates an process identity for current process or empty on error.
enum CurrentProcessTag { CurrentProcess };
WEBCORE_EXPORT explicit ProcessIdentity(CurrentProcessTag);
// Creates an empty process identity that does not grant any access.
ProcessIdentity() = default;
// Returns true for a process identity or false on empty identity.
WEBCORE_EXPORT operator bool() const;
#if HAVE(TASK_IDENTITY_TOKEN)
task_id_token_t taskIdToken() const { return m_taskIdToken.sendRight(); }
#endif
template<typename Encoder> void encode(Encoder&) const;
template<typename Decoder> static std::optional<ProcessIdentity> decode(Decoder&);
private:
#if HAVE(TASK_IDENTITY_TOKEN)
WEBCORE_EXPORT ProcessIdentity(MachSendRight&& taskIdToken);
MachSendRight m_taskIdToken;
#endif
};
template<typename Encoder> void ProcessIdentity::encode(Encoder& encoder) const
{
#if HAVE(TASK_IDENTITY_TOKEN)
encoder << m_taskIdToken;
#else
UNUSED_PARAM(encoder);
#endif
}
template<typename Decoder> std::optional<ProcessIdentity> ProcessIdentity::decode(Decoder& decoder)
{
#if HAVE(TASK_IDENTITY_TOKEN)
std::optional<MachSendRight> identitySendRight;
decoder >> identitySendRight;
if (identitySendRight)
return ProcessIdentity { WTFMove(*identitySendRight) };
return std::nullopt;
#else
UNUSED_PARAM(decoder);
return ProcessIdentity { };
#endif
}
}
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