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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/ArgumentCoder.h>
#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/TZoneMallocInlines.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
namespace WebKit {
enum class SandboxExtensionFlags : uint8_t {
Default,
NoReport,
DoNotCanonicalize,
};
enum class SandboxExtensionType : uint8_t {
ReadOnly,
ReadWrite,
Mach,
IOKit,
Generic,
ReadByProcess
};
#if ENABLE(SANDBOX_EXTENSIONS)
class SandboxExtensionImpl {
WTF_MAKE_TZONE_ALLOCATED_INLINE(SandboxExtensionImpl);
public:
static std::unique_ptr<SandboxExtensionImpl> create(const char* path, SandboxExtensionType, std::optional<audit_token_t> = std::nullopt, OptionSet<SandboxExtensionFlags> = SandboxExtensionFlags::Default);
SandboxExtensionImpl(std::span<const uint8_t>);
~SandboxExtensionImpl();
bool WARN_UNUSED_RETURN consume();
bool invalidate();
std::span<const uint8_t> WARN_UNUSED_RETURN getSerializedFormat();
SandboxExtensionImpl(SandboxExtensionImpl&& other)
: m_token(std::exchange(other.m_token, CString()))
, m_handle(std::exchange(other.m_handle, 0)) { }
private:
CString sandboxExtensionForType(const char* path, SandboxExtensionType, std::optional<audit_token_t>, OptionSet<SandboxExtensionFlags>);
SandboxExtensionImpl(const char* path, SandboxExtensionType, std::optional<audit_token_t>, OptionSet<SandboxExtensionFlags>);
CString m_token;
int64_t m_handle { 0 };
};
#endif
class SandboxExtensionHandle {
WTF_MAKE_NONCOPYABLE(SandboxExtensionHandle);
public:
SandboxExtensionHandle();
#if ENABLE(SANDBOX_EXTENSIONS)
SandboxExtensionHandle(SandboxExtensionHandle&&);
SandboxExtensionHandle& operator=(SandboxExtensionHandle&&);
SandboxExtensionHandle(std::unique_ptr<SandboxExtensionImpl>&& impl)
: m_sandboxExtension(WTFMove(impl)) { }
#else
SandboxExtensionHandle(SandboxExtensionHandle&&) = default;
SandboxExtensionHandle& operator=(SandboxExtensionHandle&&) = default;
#endif
~SandboxExtensionHandle();
#if ENABLE(SANDBOX_EXTENSIONS)
std::unique_ptr<SandboxExtensionImpl> takeImpl() { return std::exchange(m_sandboxExtension, nullptr); }
#endif
private:
friend class SandboxExtension;
#if ENABLE(SANDBOX_EXTENSIONS)
// FIXME: change SandboxExtension(const Handle&) to SandboxExtension(Handle&&) and make this no longer mutable.
mutable std::unique_ptr<SandboxExtensionImpl> m_sandboxExtension;
#endif
};
class SandboxExtension : public RefCounted<SandboxExtension> {
public:
using Handle = SandboxExtensionHandle;
using Type = SandboxExtensionType;
using Flags = SandboxExtensionFlags;
enum class MachBootstrapOptions : uint8_t {
DoNotEnableMachBootstrap,
EnableMachBootstrap
};
static RefPtr<SandboxExtension> create(Handle&&);
static std::optional<Handle> createHandle(StringView path, Type);
static Vector<Handle> createReadOnlyHandlesForFiles(ASCIILiteral logLabel, const Vector<String>& paths);
static std::optional<Handle> createHandleWithoutResolvingPath(StringView path, Type);
static std::optional<Handle> createHandleForReadWriteDirectory(StringView path); // Will attempt to create the directory.
static std::optional<std::pair<Handle, String>> createHandleForTemporaryFile(StringView prefix, Type);
static std::optional<Handle> createHandleForGenericExtension(ASCIILiteral extensionClass);
static Handle createHandleForMachBootstrapExtension();
#if HAVE(AUDIT_TOKEN)
static std::optional<Handle> createHandleForMachLookup(ASCIILiteral service, std::optional<audit_token_t>, OptionSet<Flags> = Flags::Default);
static Vector<Handle> createHandlesForMachLookup(std::span<const ASCIILiteral> services, std::optional<audit_token_t>, MachBootstrapOptions = MachBootstrapOptions::DoNotEnableMachBootstrap, OptionSet<Flags> = Flags::Default);
static Vector<Handle> createHandlesForMachLookup(std::initializer_list<const ASCIILiteral> services, std::optional<audit_token_t>, MachBootstrapOptions = MachBootstrapOptions::DoNotEnableMachBootstrap, OptionSet<Flags> = Flags::Default);
static std::optional<Handle> createHandleForReadByAuditToken(StringView path, audit_token_t);
static std::optional<Handle> createHandleForIOKitClassExtension(ASCIILiteral iokitClass, std::optional<audit_token_t>, OptionSet<Flags> = Flags::Default);
static Vector<Handle> createHandlesForIOKitClassExtensions(std::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<Handle>&);
private:
explicit SandboxExtension(const Handle&);
#if ENABLE(SANDBOX_EXTENSIONS)
std::unique_ptr<SandboxExtensionImpl> m_sandboxExtension;
size_t m_useCount { 0 };
#endif
};
String stringByResolvingSymlinksInPath(StringView path);
String resolvePathForSandboxExtension(StringView path);
String resolveAndCreateReadWriteDirectoryForSandboxExtension(StringView path);
#if !ENABLE(SANDBOX_EXTENSIONS)
inline SandboxExtensionHandle::SandboxExtensionHandle() { }
inline SandboxExtensionHandle::~SandboxExtensionHandle() { }
inline RefPtr<SandboxExtension> SandboxExtension::create(Handle&&) { return nullptr; }
inline auto SandboxExtension::createHandle(StringView, Type) -> std::optional<Handle> { return Handle { }; }
inline auto SandboxExtension::createReadOnlyHandlesForFiles(ASCIILiteral, const Vector<String>&) -> Vector<Handle> { return { }; }
inline auto SandboxExtension::createHandleWithoutResolvingPath(StringView, Type) -> std::optional<Handle> { return Handle { }; }
inline auto SandboxExtension::createHandleForReadWriteDirectory(StringView) -> std::optional<Handle> { return Handle { }; }
inline auto SandboxExtension::createHandleForTemporaryFile(StringView, 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(StringView path) { return path.toString(); }
inline String resolvePathForSandboxExtension(StringView path) { return path.toString(); }
inline String resolveAndCreateReadWriteDirectoryForSandboxExtension(StringView path) { return path.toString(); }
#endif
} // namespace WebKit
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