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/*
* Copyright (C) 2010-2020 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. AND ITS 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 APPLE INC. OR ITS 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 <wtf/Forward.h>
#include <wtf/Noncopyable.h>
#include <wtf/OptionSet.h>
#include <wtf/ProcessID.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
namespace IPC {
class Encoder;
class Decoder;
}
namespace WebKit {
class SandboxExtensionImpl;
class SandboxExtension : public RefCounted<SandboxExtension> {
public:
enum class Type : uint8_t {
ReadOnly,
ReadWrite,
Mach,
IOKit,
Generic,
ReadByProcess
};
enum class Flags : uint8_t {
Default,
NoReport,
DoNotCanonicalize,
};
class Handle {
WTF_MAKE_NONCOPYABLE(Handle);
public:
Handle();
#if ENABLE(SANDBOX_EXTENSIONS)
Handle(Handle&&);
Handle& operator=(Handle&&);
#else
Handle(Handle&&) = default;
Handle& operator=(Handle&&) = default;
#endif
~Handle();
void encode(IPC::Encoder&) const;
static std::optional<Handle> decode(IPC::Decoder&);
private:
friend class SandboxExtension;
#if ENABLE(SANDBOX_EXTENSIONS)
mutable std::unique_ptr<SandboxExtensionImpl> m_sandboxExtension;
#endif
};
static RefPtr<SandboxExtension> create(Handle&&);
static std::optional<Handle> createHandle(const String& path, Type);
static Vector<Handle> createReadOnlyHandlesForFiles(ASCIILiteral logLabel, const Vector<String>& paths);
static std::optional<Handle> createHandleWithoutResolvingPath(const String& path, Type);
static std::optional<Handle> createHandleForReadWriteDirectory(const String& path); // Will attempt to create the directory.
static std::optional<std::pair<Handle, String>> createHandleForTemporaryFile(const String& prefix, Type);
static std::optional<Handle> createHandleForGenericExtension(ASCIILiteral extensionClass);
#if HAVE(AUDIT_TOKEN)
static std::optional<Handle> createHandleForMachLookup(ASCIILiteral service, std::optional<audit_token_t>, OptionSet<Flags> = Flags::Default);
static Vector<Handle> createHandlesForMachLookup(Span<const ASCIILiteral> services, std::optional<audit_token_t>, OptionSet<Flags> = Flags::Default);
static Vector<Handle> createHandlesForMachLookup(std::initializer_list<const ASCIILiteral> services, std::optional<audit_token_t>, OptionSet<Flags> = Flags::Default);
static std::optional<Handle> createHandleForReadByAuditToken(const String& path, audit_token_t);
static std::optional<Handle> createHandleForIOKitClassExtension(ASCIILiteral iokitClass, std::optional<audit_token_t>, OptionSet<Flags> = Flags::Default);
static Vector<Handle> createHandlesForIOKitClassExtensions(Span<const ASCIILiteral> iokitClasses, std::optional<audit_token_t>, OptionSet<Flags> = Flags::Default);
#endif
~SandboxExtension();
bool consume();
bool revoke();
bool consumePermanently();
// FIXME: These should not be const.
static bool consumePermanently(const Handle&);
static bool consumePermanently(const Vector<SandboxExtension::Handle>&);
private:
explicit SandboxExtension(const Handle&);
#if ENABLE(SANDBOX_EXTENSIONS)
mutable std::unique_ptr<SandboxExtensionImpl> m_sandboxExtension;
size_t m_useCount { 0 };
#endif
};
String stringByResolvingSymlinksInPath(const String& path);
String resolvePathForSandboxExtension(const String& path);
String resolveAndCreateReadWriteDirectoryForSandboxExtension(const String& path);
#if !ENABLE(SANDBOX_EXTENSIONS)
inline SandboxExtension::Handle::Handle() { }
inline SandboxExtension::Handle::~Handle() { }
inline void SandboxExtension::Handle::encode(IPC::Encoder&) const { }
inline std::optional<SandboxExtension::Handle> SandboxExtension::Handle::decode(IPC::Decoder&) { return Handle { }; }
inline RefPtr<SandboxExtension> SandboxExtension::create(Handle&&) { return nullptr; }
inline auto SandboxExtension::createHandle(const String&, Type) -> std::optional<Handle> { return Handle { }; }
inline auto SandboxExtension::createReadOnlyHandlesForFiles(ASCIILiteral, const Vector<String>&) -> Vector<Handle> { return { }; }
inline auto SandboxExtension::createHandleWithoutResolvingPath(const String&, Type) -> std::optional<Handle> { return Handle { }; }
inline auto SandboxExtension::createHandleForReadWriteDirectory(const String&) -> std::optional<Handle> { return Handle { }; }
inline auto SandboxExtension::createHandleForTemporaryFile(const String&, Type) -> std::optional<std::pair<Handle, String>> { return std::pair<Handle, String> { }; }
inline auto SandboxExtension::createHandleForGenericExtension(ASCIILiteral) -> std::optional<Handle> { return Handle { }; }
inline SandboxExtension::~SandboxExtension() { }
inline bool SandboxExtension::revoke() { return true; }
inline bool SandboxExtension::consume() { return true; }
inline bool SandboxExtension::consumePermanently() { return true; }
inline bool SandboxExtension::consumePermanently(const Handle&) { return true; }
inline bool SandboxExtension::consumePermanently(const Vector<Handle>&) { return true; }
inline String stringByResolvingSymlinksInPath(const String& path) { return path; }
inline String resolvePathForSandboxExtension(const String& path) { return path; }
inline String resolveAndCreateReadWriteDirectoryForSandboxExtension(const String& path) { return path; }
#endif
} // namespace WebKit
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