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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "FileSystemSecurity.h"
#include "FileSystemUtils.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/ipc/BackgroundParent.h"
using namespace mozilla::ipc;
namespace mozilla {
namespace dom {
namespace {
StaticRefPtr<FileSystemSecurity> gFileSystemSecurity;
} // anonymous
/* static */ already_AddRefed<FileSystemSecurity>
FileSystemSecurity::Get()
{
MOZ_ASSERT(NS_IsMainThread());
AssertIsInMainProcess();
RefPtr<FileSystemSecurity> service = gFileSystemSecurity.get();
return service.forget();
}
/* static */ already_AddRefed<FileSystemSecurity>
FileSystemSecurity::GetOrCreate()
{
MOZ_ASSERT(NS_IsMainThread());
AssertIsInMainProcess();
if (!gFileSystemSecurity) {
gFileSystemSecurity = new FileSystemSecurity();
ClearOnShutdown(&gFileSystemSecurity);
}
RefPtr<FileSystemSecurity> service = gFileSystemSecurity.get();
return service.forget();
}
FileSystemSecurity::FileSystemSecurity()
{
MOZ_ASSERT(NS_IsMainThread());
AssertIsInMainProcess();
}
FileSystemSecurity::~FileSystemSecurity()
{
MOZ_ASSERT(NS_IsMainThread());
AssertIsInMainProcess();
}
void
FileSystemSecurity::GrantAccessToContentProcess(ContentParentId aId,
const nsAString& aDirectoryPath)
{
MOZ_ASSERT(NS_IsMainThread());
AssertIsInMainProcess();
nsTArray<nsString>* paths;
if (!mPaths.Get(aId, &paths)) {
paths = new nsTArray<nsString>();
mPaths.Put(aId, paths);
} else if (paths->Contains(aDirectoryPath)) {
return;
}
paths->AppendElement(aDirectoryPath);
}
void
FileSystemSecurity::Forget(ContentParentId aId)
{
MOZ_ASSERT(NS_IsMainThread());
AssertIsInMainProcess();
mPaths.Remove(aId);
}
bool
FileSystemSecurity::ContentProcessHasAccessTo(ContentParentId aId,
const nsAString& aPath)
{
MOZ_ASSERT(NS_IsMainThread());
AssertIsInMainProcess();
#if defined(XP_WIN)
if (StringBeginsWith(aPath, NS_LITERAL_STRING("..\\")) ||
FindInReadable(NS_LITERAL_STRING("\\..\\"), aPath)) {
return false;
}
#elif defined(XP_UNIX)
if (StringBeginsWith(aPath, NS_LITERAL_STRING("../")) ||
FindInReadable(NS_LITERAL_STRING("/../"), aPath)) {
return false;
}
#endif
nsTArray<nsString>* paths;
if (!mPaths.Get(aId, &paths)) {
return false;
}
for (uint32_t i = 0, len = paths->Length(); i < len; ++i) {
if (FileSystemUtils::IsDescendantPath(paths->ElementAt(i), aPath)) {
return true;
}
}
return false;
}
} // dom namespace
} // mozilla namespace
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