122 lines
2.8 KiB
C++
122 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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/StaticPtr.h"
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#include "mozilla/ipc/BackgroundParent.h"
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using namespace mozilla::ipc;
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namespace mozilla {
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namespace dom {
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namespace {
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StaticRefPtr<FileSystemSecurity> gFileSystemSecurity;
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} // anonymous
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/* static */ already_AddRefed<FileSystemSecurity>
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FileSystemSecurity::Get()
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{
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MOZ_ASSERT(NS_IsMainThread());
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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 */ already_AddRefed<FileSystemSecurity>
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FileSystemSecurity::GetOrCreate()
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{
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MOZ_ASSERT(NS_IsMainThread());
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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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{
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MOZ_ASSERT(NS_IsMainThread());
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AssertIsInMainProcess();
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}
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FileSystemSecurity::~FileSystemSecurity()
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{
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MOZ_ASSERT(NS_IsMainThread());
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AssertIsInMainProcess();
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}
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void
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FileSystemSecurity::GrantAccessToContentProcess(ContentParentId aId,
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const nsAString& aDirectoryPath)
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{
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MOZ_ASSERT(NS_IsMainThread());
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AssertIsInMainProcess();
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nsTArray<nsString>* paths;
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if (!mPaths.Get(aId, &paths)) {
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paths = new nsTArray<nsString>();
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mPaths.Put(aId, paths);
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} else if (paths->Contains(aDirectoryPath)) {
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return;
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}
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paths->AppendElement(aDirectoryPath);
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}
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void
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FileSystemSecurity::Forget(ContentParentId aId)
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{
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MOZ_ASSERT(NS_IsMainThread());
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AssertIsInMainProcess();
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mPaths.Remove(aId);
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}
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bool
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FileSystemSecurity::ContentProcessHasAccessTo(ContentParentId aId,
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const nsAString& aPath)
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{
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MOZ_ASSERT(NS_IsMainThread());
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AssertIsInMainProcess();
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#if defined(XP_WIN)
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if (StringBeginsWith(aPath, NS_LITERAL_STRING("..\\")) ||
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FindInReadable(NS_LITERAL_STRING("\\..\\"), 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, NS_LITERAL_STRING("../")) ||
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FindInReadable(NS_LITERAL_STRING("/../"), 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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} // dom namespace
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} // mozilla namespace
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