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      1 // Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
      2 // source code may only be used and distributed under the Widevine Master
      3 // License Agreement.
      4 //
      5 #ifndef CLEARKEY_DEVICE_FILES_H_
      6 #define CLEARKEY_DEVICE_FILES_H_
      7 
      8 #include <errno.h>
      9 #include <stdio.h>
     10 #include <unistd.h>
     11 
     12 #include <set>
     13 #include <string>
     14 #include <vector>
     15 
     16 #include "protos/DeviceFiles.pb.h"
     17 #include "ClearKeyTypes.h"
     18 #include "MemoryFileSystem.h"
     19 
     20 namespace android {
     21 namespace hardware {
     22 namespace drm {
     23 namespace V1_2 {
     24 namespace clearkey {
     25 
     26 class DeviceFiles {
     27  public:
     28     typedef enum {
     29         kLicenseStateUnknown,
     30         kLicenseStateActive,
     31         kLicenseStateReleasing,
     32     } LicenseState;
     33 
     34     DeviceFiles() {};
     35     virtual ~DeviceFiles() {};
     36 
     37     virtual bool StoreLicense(const std::string& keySetId, LicenseState state,
     38             const std::string& keyResponse);
     39 
     40     virtual bool RetrieveLicense(
     41             const std::string& key_set_id, LicenseState* state, std::string* offlineLicense);
     42 
     43     virtual bool LicenseExists(const std::string& keySetId);
     44 
     45     virtual std::vector<std::string> ListLicenses() const;
     46 
     47     virtual bool DeleteLicense(const std::string& keySetId);
     48 
     49     virtual bool DeleteAllLicenses();
     50 
     51  private:
     52     bool FileExists(const std::string& path) const;
     53     ssize_t GetFileSize(const std::string& fileName) const;
     54     bool RemoveFile(const std::string& fileName);
     55 
     56     bool RetrieveHashedFile(const std::string& fileName, OfflineFile* deSerializedFile);
     57     bool StoreFileRaw(const std::string& fileName, const std::string& serializedFile);
     58     bool StoreFileWithHash(const std::string& fileName, const std::string& serializedFile);
     59 
     60     MemoryFileSystem mFileHandle;
     61 
     62     CLEARKEY_DISALLOW_COPY_AND_ASSIGN(DeviceFiles);
     63 };
     64 
     65 } // namespace clearkey
     66 } // namespace V1_2
     67 } // namespace drm
     68 } // namespace hardware
     69 } // namespace android
     70 
     71 #endif  // CLEARKEY_DEVICE_FILES_H_
     72