blob: 6ac0e2c4bb993cde003e62dcc6916a9e3ec93b4e [file] [log] [blame]
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine Master
// License Agreement.
#include <android-base/thread_annotations.h>
#include <map>
#include <mutex>
#include <string>
#include "ClearKeyTypes.h"
namespace android {
namespace hardware {
namespace drm {
namespace V1_2 {
namespace clearkey {
// Using android file system requires clearkey plugin to update
// its sepolicy. However, we are unable to update sepolicy for
// older vendor partitions. To provide backward compatibility,
// clearkey plugin implements a very simple file system in memory.
// This memory file system does not support directory structure.
class MemoryFileSystem {
struct MemoryFile {
std::string fileName; // excludes path
std::string content;
size_t fileSize;
std::string getContent() const { return content; }
size_t getFileSize() const { return fileSize; }
void setContent(const std::string& file) { content = file; }
void setFileName(const std::string& name) { fileName = name; }
void setFileSize(size_t size) {
content.resize(size); fileSize = size;
MemoryFileSystem() {};
virtual ~MemoryFileSystem() {};
bool FileExists(const std::string& fileName) const;
ssize_t GetFileSize(const std::string& fileName) const;
std::vector<std::string> ListFiles() const;
size_t Read(const std::string& pathName, std::string* buffer);
bool RemoveAllFiles();
bool RemoveFile(const std::string& fileName);
size_t Write(const std::string& pathName, const MemoryFile& memoryFile);
mutable std::mutex mMemoryFileSystemLock;
// License file name is made up of a unique keySetId, therefore,
// the filename can be used as the key to locate licenses in the
// memory file system.
std::map<std::string, MemoryFile> mMemoryFileSystem GUARDED_BY(mMemoryFileSystemLock);
std::string GetFileName(const std::string& path);
} // namespace clearkey
} // namespace V1_2
} // namespace drm
} // namespace hardware
} // namespace android