mirror of
https://github.com/mozilla/gecko-dev.git
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107 lines
2.8 KiB
C++
107 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FileSystemSecurity.h"
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#include "FileSystemUtils.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/ipc/BackgroundParent.h"
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#include "mozilla/StaticPtr.h"
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namespace mozilla::dom {
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namespace {
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StaticRefPtr<FileSystemSecurity> gFileSystemSecurity;
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} // namespace
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/* static */
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already_AddRefed<FileSystemSecurity> FileSystemSecurity::Get() {
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MOZ_ASSERT(NS_IsMainThread());
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mozilla::ipc::AssertIsInMainProcess();
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RefPtr<FileSystemSecurity> service = gFileSystemSecurity.get();
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return service.forget();
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}
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/* static */
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already_AddRefed<FileSystemSecurity> FileSystemSecurity::GetOrCreate() {
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MOZ_ASSERT(NS_IsMainThread());
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mozilla::ipc::AssertIsInMainProcess();
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if (!gFileSystemSecurity) {
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gFileSystemSecurity = new FileSystemSecurity();
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ClearOnShutdown(&gFileSystemSecurity);
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}
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RefPtr<FileSystemSecurity> service = gFileSystemSecurity.get();
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return service.forget();
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}
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FileSystemSecurity::FileSystemSecurity() {
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MOZ_ASSERT(NS_IsMainThread());
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mozilla::ipc::AssertIsInMainProcess();
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}
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FileSystemSecurity::~FileSystemSecurity() {
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MOZ_ASSERT(NS_IsMainThread());
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mozilla::ipc::AssertIsInMainProcess();
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}
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void FileSystemSecurity::GrantAccessToContentProcess(
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ContentParentId aId, const nsAString& aDirectoryPath) {
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MOZ_ASSERT(NS_IsMainThread());
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mozilla::ipc::AssertIsInMainProcess();
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mPaths.WithEntryHandle(aId, [&](auto&& entry) {
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if (entry && entry.Data()->Contains(aDirectoryPath)) {
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return;
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}
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entry.OrInsertWith([] { return MakeUnique<nsTArray<nsString>>(); })
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->AppendElement(aDirectoryPath);
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});
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}
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void FileSystemSecurity::Forget(ContentParentId aId) {
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MOZ_ASSERT(NS_IsMainThread());
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mozilla::ipc::AssertIsInMainProcess();
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mPaths.Remove(aId);
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}
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bool FileSystemSecurity::ContentProcessHasAccessTo(ContentParentId aId,
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const nsAString& aPath) {
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MOZ_ASSERT(NS_IsMainThread());
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mozilla::ipc::AssertIsInMainProcess();
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#if defined(XP_WIN)
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if (StringBeginsWith(aPath, u"..\\"_ns) ||
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FindInReadable(u"\\..\\"_ns, aPath)) {
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return false;
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}
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#elif defined(XP_UNIX)
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if (StringBeginsWith(aPath, u"../"_ns) || FindInReadable(u"/../"_ns, aPath)) {
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return false;
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}
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#endif
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nsTArray<nsString>* paths;
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if (!mPaths.Get(aId, &paths)) {
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return false;
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}
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for (uint32_t i = 0, len = paths->Length(); i < len; ++i) {
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if (FileSystemUtils::IsDescendantPath(paths->ElementAt(i), aPath)) {
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return true;
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}
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}
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return false;
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}
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} // namespace mozilla::dom
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