android/libwvdrmengine/cdm/core/src/properties.cpp

// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine License
// Agreement.

#include "properties.h"

#include "log.h"
#include "wv_cdm_constants.h"

namespace {
const char* kSecurityLevelDirs[] = {"L1/", "L3/"};
}  // namespace

namespace wvcdm {
using UniqueLock = std::unique_lock<std::mutex>;

std::mutex Properties::init_mutex_;
std::mutex Properties::session_mutex_;
bool Properties::is_initialized_ = false;
bool Properties::oem_crypto_use_secure_buffers_;
bool Properties::oem_crypto_use_fifo_;
bool Properties::oem_crypto_use_userspace_buffers_;
bool Properties::provisioning_messages_are_binary_;
bool Properties::allow_service_certificate_requests_;
bool Properties::device_files_is_a_real_filesystem_;
bool Properties::allow_restore_of_offline_licenses_with_release_;
bool Properties::delay_oem_crypto_termination_;
std::unique_ptr<CdmClientPropertySetMap> Properties::session_property_set_;

bool Properties::AddSessionPropertySet(const CdmSessionId& session_id,
                                       CdmClientPropertySet* property_set) {
  UniqueLock lock(session_mutex_);
  if (!session_property_set_) {
    return false;
  }
  std::pair<CdmClientPropertySetMap::iterator, bool> result =
      session_property_set_->insert(
          std::pair<const CdmSessionId, CdmClientPropertySet*>(session_id,
                                                               property_set));
  return result.second;
}

bool Properties::RemoveSessionPropertySet(const CdmSessionId& session_id) {
  UniqueLock lock(session_mutex_);
  if (!session_property_set_) {
    return false;
  }
  return (1 == session_property_set_->erase(session_id));
}

CdmClientPropertySet* Properties::GetCdmClientPropertySet(
    const CdmSessionId& session_id) {
  // Call must obtain |session_mutex_|.
  if (session_property_set_) {
    CdmClientPropertySetMap::iterator it =
        session_property_set_->find(session_id);
    if (it != session_property_set_->end()) {
      return it->second;
    }
  }
  return nullptr;
}

bool Properties::GetApplicationId(const CdmSessionId& session_id,
                                  std::string* app_id) {
  UniqueLock lock(session_mutex_);
  const CdmClientPropertySet* property_set =
      GetCdmClientPropertySet(session_id);
  if (property_set == nullptr) {
    return false;
  }
  *app_id = property_set->app_id();
  return true;
}

bool Properties::GetServiceCertificate(const CdmSessionId& session_id,
                                       std::string* service_certificate) {
  UniqueLock lock(session_mutex_);
  const CdmClientPropertySet* property_set =
      GetCdmClientPropertySet(session_id);
  if (property_set == nullptr) {
    return false;
  }
  *service_certificate = property_set->service_certificate();
  return true;
}

bool Properties::SetServiceCertificate(const CdmSessionId& session_id,
                                       const std::string& service_certificate) {
  UniqueLock lock(session_mutex_);
  CdmClientPropertySet* property_set = GetCdmClientPropertySet(session_id);
  if (property_set == nullptr) {
    return false;
  }
  property_set->set_service_certificate(service_certificate);
  return true;
}

bool Properties::UsePrivacyMode(const CdmSessionId& session_id) {
  UniqueLock lock(session_mutex_);
  const CdmClientPropertySet* property_set =
      GetCdmClientPropertySet(session_id);
  if (property_set == nullptr) {
    return false;
  }
  return property_set->use_privacy_mode();
}

uint32_t Properties::GetSessionSharingId(const CdmSessionId& session_id) {
  UniqueLock lock(session_mutex_);
  const CdmClientPropertySet* property_set =
      GetCdmClientPropertySet(session_id);
  if (property_set == nullptr) {
    return 0;
  }
  return property_set->session_sharing_id();
}

bool Properties::GetSecurityLevelDirectories(std::vector<std::string>* dirs) {
  dirs->resize(sizeof(kSecurityLevelDirs) / sizeof(const char*));
  for (size_t i = 0; i < dirs->size(); ++i) {
    (*dirs)[i] = kSecurityLevelDirs[i];
  }
  return true;
}

}  // namespace wvcdm