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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/ipc/BackgroundParent.h"
#include "mozilla/StaticPtr.h"
namespace mozilla::dom {
namespace {
StaticRefPtr<FileSystemSecurity> gFileSystemSecurity;
} // namespace
/* static */
already_AddRefed<FileSystemSecurity> FileSystemSecurity::Get() {
MOZ_ASSERT(NS_IsMainThread());
mozilla::ipc::AssertIsInMainProcess();
RefPtr<FileSystemSecurity> service = gFileSystemSecurity.get();
return service.forget();
}
/* static */
already_AddRefed<FileSystemSecurity> FileSystemSecurity::GetOrCreate() {
MOZ_ASSERT(NS_IsMainThread());
mozilla::ipc::AssertIsInMainProcess();
if (!gFileSystemSecurity) {
gFileSystemSecurity = new FileSystemSecurity();
ClearOnShutdown(&gFileSystemSecurity);
}
RefPtr<FileSystemSecurity> service = gFileSystemSecurity.get();
return service.forget();
}
FileSystemSecurity::FileSystemSecurity() {
MOZ_ASSERT(NS_IsMainThread());
mozilla::ipc::AssertIsInMainProcess();
}
FileSystemSecurity::~FileSystemSecurity() {
MOZ_ASSERT(NS_IsMainThread());
mozilla::ipc::AssertIsInMainProcess();
}
void FileSystemSecurity::GrantAccessToContentProcess(
ContentParentId aId, const nsAString& aDirectoryPath) {
MOZ_ASSERT(NS_IsMainThread());
mozilla::ipc::AssertIsInMainProcess();
mPaths.WithEntryHandle(aId, [&](auto&& entry) {
if (entry && entry.Data()->Contains(aDirectoryPath)) {
return;
}
entry.OrInsertWith([] { return MakeUnique<nsTArray<nsString>>(); })
->AppendElement(aDirectoryPath);
});
}
void FileSystemSecurity::Forget(ContentParentId aId) {
MOZ_ASSERT(NS_IsMainThread());
mozilla::ipc::AssertIsInMainProcess();
mPaths.Remove(aId);
}
bool FileSystemSecurity::ContentProcessHasAccessTo(ContentParentId aId,
const nsAString& aPath) {
MOZ_ASSERT(NS_IsMainThread());
mozilla::ipc::AssertIsInMainProcess();
#if defined(XP_WIN)
if (StringBeginsWith(aPath, u"..\\"_ns) ||
FindInReadable(u"\\..\\"_ns, aPath)) {
return false;
}
#elif defined(XP_UNIX)
if (StringBeginsWith(aPath, u"../"_ns) || FindInReadable(u"/../"_ns, 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;
}
} // namespace mozilla::dom
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