// Copyright 2012 Google Inc. All Rights Reserved. #include "license.h" #include #include #include #include "clock.h" #include "cdm_session.h" #include "crypto_key.h" #include "crypto_session.h" #include "device_files.h" #include "log.h" #include "policy_engine.h" #include "privacy_crypto.h" #include "properties.h" #include "service_certificate.h" #include "string_conversions.h" #include "wv_cdm_constants.h" namespace { const std::string kCompanyNameKey = "company_name"; const std::string kModelNameKey = "model_name"; const std::string kArchitectureNameKey = "architecture_name"; const std::string kDeviceNameKey = "device_name"; const std::string kProductNameKey = "product_name"; const std::string kBuildInfoKey = "build_info"; const std::string kDeviceIdKey = "device_id"; const std::string kWVCdmVersionKey = "widevine_cdm_version"; const std::string kOemCryptoSecurityPatchLevelKey = "oem_crypto_security_patch_level"; const uint32_t kFourCcCbc1 = 0x63626331; const uint32_t kFourCcCbcs = 0x63626373; const uint32_t kFourCcLittleEndianCbc1 = 0x31636263; const uint32_t kFourCcLittleEndianCbcs = 0x73636263; const uint32_t kFourCcCenc = 0x63656e63; const uint32_t kFourCcCens = 0x63656e73; } // namespace namespace wvcdm { // Protobuf generated classes. using video_widevine::ClientIdentification; using video_widevine::ClientIdentification_ClientCapabilities; using video_widevine::ClientIdentification_NameValue; using video_widevine::DrmDeviceCertificate; using video_widevine::EncryptedClientIdentification; using video_widevine::License; using video_widevine::License_KeyContainer; using video_widevine::LicenseError; using video_widevine::LicenseIdentification; using video_widevine::LicenseRequest; using video_widevine::LicenseRequest_ContentIdentification; using video_widevine::LicenseRequest_ContentIdentification_CencDeprecated; using video_widevine::LicenseRequest_ContentIdentification_WebmDeprecated; using video_widevine::LicenseRequest_ContentIdentification_ExistingLicense; using video_widevine::SignedDrmDeviceCertificate; using video_widevine::SignedMessage; static std::vector ExtractContentKeys(const License& license) { std::vector key_array; // Extract content key(s) for (int i = 0; i < license.key_size(); ++i) { CryptoKey key; size_t length; switch (license.key(i).type()) { case License_KeyContainer::CONTENT: case License_KeyContainer::OPERATOR_SESSION: { key.set_key_id(license.key(i).id()); // Strip off PKCS#5 padding - since we know the key is 16 or 32 bytes, // the padding will always be 16 bytes. if (license.key(i).key().size() > 16) { length = license.key(i).key().size() - 16; } else { length = 0; } key.set_key_data(license.key(i).key().substr(0, length)); key.set_key_data_iv(license.key(i).iv()); if (license.key(i).has_key_control()) { key.set_key_control(license.key(i).key_control().key_control_block()); key.set_key_control_iv(license.key(i).key_control().iv()); } uint32_t four_cc = kFourCcCenc; if (license.has_protection_scheme()) { four_cc = license.protection_scheme(); } switch (four_cc) { // b/30713238: Android N assumed that the "protection scheme" Four // CC code, after being extracted from the protobuf, was host byte // order dependent. Later versions do not assume this, and thus, // for backwards compatibility, must support both byte orders. case kFourCcCbc1: case kFourCcCbcs: case kFourCcLittleEndianCbc1: case kFourCcLittleEndianCbcs: key.set_cipher_mode(kCipherModeCbc); break; default: key.set_cipher_mode(kCipherModeCtr); break; } key_array.push_back(key); break; } case License_KeyContainer::KEY_CONTROL: if (license.key(i).has_key_control()) { key.set_key_control(license.key(i).key_control().key_control_block()); if (license.key(i).key_control().has_iv()) { key.set_key_control_iv(license.key(i).key_control().iv()); } key_array.push_back(key); } break; default: // Ignore SIGNING key types as they are not content related break; } } return key_array; } CdmLicense::CdmLicense(const CdmSessionId& session_id) : crypto_session_(NULL), policy_engine_(NULL), session_id_(session_id), initialized_(false), renew_with_client_id_(false), is_offline_(false), clock_(new Clock()) {} CdmLicense::CdmLicense(const CdmSessionId& session_id, Clock* clock) : crypto_session_(NULL), policy_engine_(NULL), session_id_(session_id), initialized_(false), renew_with_client_id_(false), is_offline_(false) { clock_.reset(clock); } CdmLicense::~CdmLicense() {} bool CdmLicense::Init( ServiceCertificate* service_certificate, const std::string& client_token, CdmClientTokenType client_token_type, const std::string& device_id, CryptoSession* session, PolicyEngine* policy_engine) { if (clock_.get() == NULL) { LOGE("CdmLicense::Init: clock parameter not provided"); return false; } if (session_id_.empty()) { LOGE("CdmLicense::Init: empty session id provided"); return false; } if (client_token.size() == 0) { LOGE("CdmLicense::Init: empty client token provided"); return false; } if (session == NULL || !session->IsOpen()) { LOGE("CdmLicense::Init: crypto session not provided or not open"); return false; } if (policy_engine == NULL) { LOGE("CdmLicense::Init: no policy engine provided"); return false; } service_certificate_ = service_certificate; client_token_ = client_token; client_token_type_ = client_token_type; device_id_ = device_id; crypto_session_ = session; policy_engine_ = policy_engine; initialized_ = true; return true; } CdmResponseType CdmLicense::PrepareKeyRequest( const InitializationData& init_data, CdmLicenseType license_type, const CdmAppParameterMap& app_parameters, CdmKeyMessage* signed_request, std::string* server_url) { if (!initialized_) { LOGE("CdmLicense::PrepareKeyRequest: not initialized"); return LICENSE_PARSER_NOT_INITIALIZED_4; } if (!init_data.is_supported()) { LOGE("CdmLicense::PrepareKeyRequest: unsupported init data type (%s)", init_data.type().c_str()); return INVALID_PARAMETERS_LIC_3; } if (init_data.IsEmpty()) { LOGE("CdmLicense::PrepareKeyRequest: empty init data provided"); return INVALID_PARAMETERS_LIC_4; } if (!signed_request) { LOGE("CdmLicense::PrepareKeyRequest: no signed request provided"); return INVALID_PARAMETERS_LIC_6; } if (!server_url) { LOGE("CdmLicense::PrepareKeyRequest: no server url provided"); return INVALID_PARAMETERS_LIC_7; } // If privacy mode, must have service certificate if (Properties::UsePrivacyMode(session_id_) && !service_certificate_->has_certificate()) { LOGE("CdmLicense::PrepareKeyRequest: failure with privacy mode - " "no service certificate."); return PRIVACY_MODE_ERROR_1; } std::string request_id; crypto_session_->GenerateRequestId(&request_id); LicenseRequest license_request; CdmResponseType status; status = PrepareClientId(app_parameters, &license_request); if (NO_ERROR != status) return status; status = PrepareContentId(init_data, license_type, request_id, &license_request); if (NO_ERROR != status) return status; license_request.set_type(LicenseRequest::NEW); license_request.set_request_time(clock_->GetCurrentTime()); // Get/set the nonce. This value will be reflected in the Key Control Block // of the license response. uint32_t nonce; if (!crypto_session_->GenerateNonce(&nonce)) { return LICENSE_REQUEST_NONCE_GENERATION_ERROR; } license_request.set_key_control_nonce(nonce); LOGD("PrepareKeyRequest: nonce=%u", nonce); license_request.set_protocol_version(video_widevine::VERSION_2_1); // License request is complete. Serialize it. std::string serialized_license_req; license_request.SerializeToString(&serialized_license_req); if (Properties::use_certificates_as_identification()) key_request_ = serialized_license_req; // Derive signing and encryption keys and construct signature. std::string license_request_signature; if (!crypto_session_->PrepareRequest(serialized_license_req, false, &license_request_signature)) { signed_request->clear(); return LICENSE_REQUEST_SIGNING_ERROR; } if (license_request_signature.empty()) { LOGE("CdmLicense::PrepareKeyRequest: License request signature empty"); signed_request->clear(); return EMPTY_LICENSE_REQUEST; } // Put serialized license request and signature together SignedMessage signed_message; signed_message.set_type(SignedMessage::LICENSE_REQUEST); signed_message.set_signature(license_request_signature); signed_message.set_msg(serialized_license_req); signed_message.SerializeToString(signed_request); *server_url = server_url_; return KEY_MESSAGE; } CdmResponseType CdmLicense::PrepareKeyUpdateRequest( bool is_renewal, const CdmAppParameterMap& app_parameters, CdmSession* cdm_session, CdmKeyMessage* signed_request, std::string* server_url) { if (!initialized_) { LOGE("CdmLicense::PrepareKeyUpdateRequest: not initialized"); return LICENSE_PARSER_NOT_INITIALIZED_1; } if (!signed_request) { LOGE("CdmLicense::PrepareKeyUpdateRequest: No signed request provided"); return INVALID_PARAMETERS_LIC_1; } if (!server_url) { LOGE("CdmLicense::PrepareKeyUpdateRequest: No server url provided"); return INVALID_PARAMETERS_LIC_2; } if (is_renewal && !policy_engine_->CanRenew()) { LOGE("CdmLicense::PrepareKeyUpdateRequest: license renewal prohibited"); return LICENSE_RENEWAL_PROHIBITED; } if (renew_with_client_id_) { if (Properties::UsePrivacyMode(session_id_) && !service_certificate_->has_certificate()) { LOGE("CdmLicense::PrepareKeyUpdateRequest: failure with privacy mode - " "no service certificate."); return PRIVACY_MODE_ERROR_2; } } LicenseRequest license_request; if (is_renewal) license_request.set_type(LicenseRequest::RENEWAL); else license_request.set_type(LicenseRequest::RELEASE); license_request.set_request_time(clock_->GetCurrentTime()); if (renew_with_client_id_) { CdmResponseType status = PrepareClientId(app_parameters, &license_request); if (NO_ERROR != status) return status; } LicenseRequest_ContentIdentification_ExistingLicense* current_license = license_request.mutable_content_id()->mutable_existing_license(); LicenseIdentification license_id = policy_engine_->license_id(); current_license->mutable_license_id()->CopyFrom(license_id); int64_t seconds_since_started, seconds_since_last_played; CryptoSession::UsageDurationStatus usage_duration_status = CryptoSession::kUsageDurationsInvalid; if (!provider_session_token_.empty()) { if (!is_renewal) { CdmResponseType status = crypto_session_->DeactivateUsageInformation(provider_session_token_); if (NO_ERROR != status) return status; } // TODO(rfrias): Refactor to avoid needing to call CdmSession if (cdm_session) { CdmResponseType status = cdm_session->UpdateUsageEntryInformation(); if (NO_ERROR != status) return status; } std::string usage_report; CdmResponseType status = crypto_session_->GenerateUsageReport( provider_session_token_, &usage_report, &usage_duration_status, &seconds_since_started, &seconds_since_last_played); if (!is_renewal) { if (NO_ERROR == status) current_license->set_session_usage_table_entry(usage_report); else return GENERATE_USAGE_REPORT_ERROR; } } if (CryptoSession::kUsageDurationsValid != usage_duration_status) { if (policy_engine_->GetSecondsSinceStarted(&seconds_since_started) && policy_engine_->GetSecondsSinceLastPlayed(&seconds_since_last_played)) usage_duration_status = CryptoSession::kUsageDurationsValid; } if (CryptoSession::kUsageDurationsValid == usage_duration_status) { current_license->set_seconds_since_started(seconds_since_started); current_license->set_seconds_since_last_played(seconds_since_last_played); } // Get/set the nonce. This value will be reflected in the Key Control Block // of the license response. uint32_t nonce; if (!crypto_session_->GenerateNonce(&nonce)) { return LICENSE_RENEWAL_NONCE_GENERATION_ERROR; } license_request.set_key_control_nonce(nonce); LOGD("PrepareKeyUpdateRequest: nonce=%u", nonce); license_request.set_protocol_version(video_widevine::VERSION_2_1); // License request is complete. Serialize it. std::string serialized_license_req; license_request.SerializeToString(&serialized_license_req); // Construct signature. std::string license_request_signature; if (!crypto_session_->PrepareRenewalRequest(serialized_license_req, &license_request_signature)) return LICENSE_RENEWAL_SIGNING_ERROR; if (license_request_signature.empty()) { LOGE( "CdmLicense::PrepareKeyUpdateRequest: empty license request" " signature"); return EMPTY_LICENSE_RENEWAL; } // Put serialize license request and signature together SignedMessage signed_message; signed_message.set_type(SignedMessage::LICENSE_REQUEST); signed_message.set_signature(license_request_signature); signed_message.set_msg(serialized_license_req); signed_message.SerializeToString(signed_request); *server_url = server_url_; return KEY_MESSAGE; } CdmResponseType CdmLicense::HandleKeyResponse( const CdmKeyResponse& license_response) { if (!initialized_) { LOGE("CdmLicense::HandleKeyResponse: not initialized"); return LICENSE_PARSER_NOT_INITIALIZED_2; } if (license_response.empty()) { LOGE("CdmLicense::HandleKeyResponse: empty license response"); return EMPTY_LICENSE_RESPONSE_1; } SignedMessage signed_response; if (!signed_response.ParseFromString(license_response)) { LOGE( "CdmLicense::HandleKeyResponse: unable to parse signed license" " response"); return INVALID_LICENSE_RESPONSE; } switch (signed_response.type()) { case SignedMessage::LICENSE: break; case SignedMessage::ERROR_RESPONSE: return HandleKeyErrorResponse(signed_response); default: LOGE( "CdmLicense::HandleKeyResponse: unrecognized signed message type: %d", signed_response.type()); return INVALID_LICENSE_TYPE; } if (!signed_response.has_signature()) { LOGE("CdmLicense::HandleKeyResponse: license response is not signed"); return LICENSE_RESPONSE_NOT_SIGNED; } License license; if (!license.ParseFromString(signed_response.msg())) { LOGE("CdmLicense::HandleKeyResponse: unable to parse license response"); return LICENSE_RESPONSE_PARSE_ERROR_1; } if (Properties::use_certificates_as_identification()) { if (!signed_response.has_session_key()) { LOGE("CdmLicense::HandleKeyResponse: no session keys present"); return SESSION_KEYS_NOT_FOUND; } if (!crypto_session_->GenerateDerivedKeys(key_request_, signed_response.session_key())) return GENERATE_DERIVED_KEYS_ERROR; } // Extract mac key std::string mac_key_iv; std::string mac_key; for (int i = 0; i < license.key_size(); ++i) { if (license.key(i).type() == License_KeyContainer::SIGNING) { mac_key_iv.assign(license.key(i).iv()); // Strip off PKCS#5 padding mac_key.assign(license.key(i).key().data(), MAC_KEY_SIZE); } } if (license.policy().can_renew() || (mac_key_iv.size() != 0 || mac_key.size() != 0)) { if (mac_key_iv.size() != KEY_IV_SIZE || mac_key.size() != MAC_KEY_SIZE) { LOGE( "CdmLicense::HandleKeyResponse: mac key/iv size error" "(key/iv size expected: %d/%d, actual: %d/%d", MAC_KEY_SIZE, KEY_IV_SIZE, mac_key.size(), mac_key_iv.size()); return KEY_SIZE_ERROR; } } std::vector key_array = ExtractContentKeys(license); if (!key_array.size()) { LOGE("CdmLicense::HandleKeyResponse : No content keys."); return NO_CONTENT_KEY; } if (license.has_srm_update()) crypto_session_->LoadSrm(license.srm_update()); if (license.id().type() == video_widevine::OFFLINE && license.policy().can_persist()) is_offline_ = true; LOGV("Get Provider_session_token:"); if (license.id().has_provider_session_token()) { provider_session_token_ = license.id().provider_session_token(); LOGV("Provider_session_token=%s", provider_session_token_.c_str()); } else { LOGV("NO Provider_session_token"); } if (license.policy().has_renewal_server_url()) { server_url_ = license.policy().renewal_server_url(); } if (license.policy().has_always_include_client_id()) { renew_with_client_id_ = license.policy().always_include_client_id(); } CdmResponseType resp = crypto_session_->LoadKeys( signed_response.msg(), signed_response.signature(), mac_key_iv, mac_key, key_array, provider_session_token_, license.srm_requirement()); if (KEY_ADDED == resp) { loaded_keys_.clear(); for (std::vector::iterator it = key_array.begin(); it != key_array.end(); ++it) { loaded_keys_.insert(it->key_id()); } policy_engine_->SetLicense(license); } return resp; } CdmResponseType CdmLicense::HandleKeyUpdateResponse( bool is_renewal, const CdmKeyResponse& license_response) { if (!initialized_) { LOGE("CdmLicense::HandleKeyUpdateResponse: not initialized"); return LICENSE_PARSER_NOT_INITIALIZED_3; } if (license_response.empty()) { LOGE("CdmLicense::HandleKeyUpdateResponse : Empty license response."); return EMPTY_LICENSE_RESPONSE_2; } SignedMessage signed_response; if (!signed_response.ParseFromString(license_response)) { LOGE("CdmLicense::HandleKeyUpdateResponse: Unable to parse signed message"); return LICENSE_RESPONSE_PARSE_ERROR_2; } switch (signed_response.type()) { case SignedMessage::LICENSE: break; case SignedMessage::ERROR_RESPONSE: return HandleKeyErrorResponse(signed_response); default: LOGE( "CdmLicense::HandleKeyUpdateResponse: unrecognized signed message " "type: %d", signed_response.type()); return INVALID_LICENSE_TYPE; } if (!signed_response.has_signature()) { LOGE("CdmLicense::HandleKeyUpdateResponse: signature missing"); return SIGNATURE_NOT_FOUND; } License license; if (!license.ParseFromString(signed_response.msg())) { LOGE( "CdmLicense::HandleKeyUpdateResponse: Unable to parse license" " from signed message"); return LICENSE_RESPONSE_PARSE_ERROR_3; } if (!license.has_id()) { LOGE("CdmLicense::HandleKeyUpdateResponse: license id not present"); return LICENSE_ID_NOT_FOUND; } if (license.policy().has_always_include_client_id()) { renew_with_client_id_ = license.policy().always_include_client_id(); } if (!is_renewal) { if (!license.id().has_provider_session_token()) return KEY_ADDED; provider_session_token_ = license.id().provider_session_token(); CdmResponseType status = crypto_session_->ReleaseUsageInformation( signed_response.msg(), signed_response.signature(), provider_session_token_); return (NO_ERROR == status) ? KEY_ADDED : status; } if (license.policy().has_renewal_server_url() && license.policy().renewal_server_url().size() > 0) { server_url_ = license.policy().renewal_server_url(); } std::vector key_array = ExtractContentKeys(license); if (crypto_session_->RefreshKeys(signed_response.msg(), signed_response.signature(), key_array.size(), &key_array[0])) { policy_engine_->UpdateLicense(license); return KEY_ADDED; } else { return REFRESH_KEYS_ERROR; } } bool CdmLicense::RestoreOfflineLicense( const CdmKeyMessage& license_request, const CdmKeyResponse& license_response, const CdmKeyResponse& license_renewal_response, int64_t playback_start_time, int64_t last_playback_time, int64_t grace_period_end_time) { if (license_request.empty() || license_response.empty()) { LOGE( "CdmLicense::RestoreOfflineLicense: key_request or response empty: " "%u %u", license_request.size(), license_response.size()); return false; } SignedMessage signed_request; if (!signed_request.ParseFromString(license_request)) { LOGE("CdmLicense::RestoreOfflineLicense: license_request parse failed"); return false; } if (signed_request.type() != SignedMessage::LICENSE_REQUEST) { LOGE( "CdmLicense::RestoreOfflineLicense: license request type: expected = " "%d, actual = %d", SignedMessage::LICENSE_REQUEST, signed_request.type()); return false; } if (Properties::use_certificates_as_identification()) { key_request_ = signed_request.msg(); } else { if (!crypto_session_->GenerateDerivedKeys(signed_request.msg())) { return false; } } CdmResponseType sts = HandleKeyResponse(license_response); if (sts != KEY_ADDED) return false; if (!license_renewal_response.empty()) { sts = HandleKeyUpdateResponse(true, license_renewal_response); if (sts != KEY_ADDED) return false; } if (!provider_session_token_.empty()) { std::string usage_report; CryptoSession::UsageDurationStatus usage_duration_status = CryptoSession::kUsageDurationsInvalid; int64_t seconds_since_started, seconds_since_last_played; sts = crypto_session_->GenerateUsageReport( provider_session_token_, &usage_report, &usage_duration_status, &seconds_since_started, &seconds_since_last_played); if (NO_ERROR == sts) { switch (usage_duration_status) { case CryptoSession::kUsageDurationPlaybackNotBegun: playback_start_time = 0; last_playback_time = 0; break; case CryptoSession::kUsageDurationsValid: { int64_t current_time = clock_->GetCurrentTime(); if (current_time - seconds_since_started > 0) playback_start_time = current_time - seconds_since_started; if (current_time - last_playback_time > 0) last_playback_time = current_time - seconds_since_last_played; break; } default: break; } } } policy_engine_->RestorePlaybackTimes(playback_start_time, last_playback_time, grace_period_end_time); return true; } bool CdmLicense::RestoreLicenseForRelease( const CdmKeyMessage& license_request, const CdmKeyResponse& license_response) { if (license_request.empty() || license_response.empty()) { LOGE( "CdmLicense::RestoreLicenseForRelease: key_request or response empty:" " %u %u", license_request.size(), license_response.size()); return false; } SignedMessage signed_request; if (!signed_request.ParseFromString(license_request)) { LOGE("CdmLicense::RestoreLicenseForRelease: license_request parse failed"); return false; } if (signed_request.type() != SignedMessage::LICENSE_REQUEST) { LOGE( "CdmLicense::RestoreLicenseForRelease: license request type: expected " "= %d, actual = %d", SignedMessage::LICENSE_REQUEST, signed_request.type()); return false; } if (Properties::use_certificates_as_identification()) { key_request_ = signed_request.msg(); } else { if (!crypto_session_->GenerateDerivedKeys(signed_request.msg())) { return false; } } SignedMessage signed_response; if (!signed_response.ParseFromString(license_response)) { LOGE( "CdmLicense::RestoreLicenseForRelease: unable to parse signed license" " response"); return false; } if (SignedMessage::LICENSE != signed_response.type()) { LOGE( "CdmLicense::RestoreLicenseForRelease: unrecognized signed message " "type: %d", signed_response.type()); return false; } if (!signed_response.has_signature()) { LOGE( "CdmLicense::RestoreLicenseForRelease: license response is not" " signed"); return false; } License license; if (!license.ParseFromString(signed_response.msg())) { LOGE( "CdmLicense::RestoreLicenseForRelease: unable to parse license" " response"); return false; } if (license.id().has_provider_session_token()) provider_session_token_ = license.id().provider_session_token(); if (license.policy().has_always_include_client_id()) renew_with_client_id_ = license.policy().always_include_client_id(); if (Properties::use_certificates_as_identification()) { if (!signed_response.has_session_key()) { LOGE("CdmLicense::RestoreLicenseForRelease: no session keys present"); return false; } if (license.id().has_provider_session_token()) { if (!crypto_session_->GenerateDerivedKeys(key_request_, signed_response.session_key())) return false; } else { return KEY_ADDED == HandleKeyResponse(license_response); } } if (license.policy().has_renewal_server_url()) server_url_ = license.policy().renewal_server_url(); // If the policy engine already has keys, they will now expire. // If the policy engine does not already have keys, this will not add any. policy_engine_->SetLicenseForRelease(license); return true; } bool CdmLicense::IsKeyLoaded(const KeyId& key_id) { return loaded_keys_.find(key_id) != loaded_keys_.end(); } bool CdmLicense::ExtractProviderSessionToken( const CdmKeyResponse& license_response, std::string* provider_session_token) { if (license_response.empty()) { LOGE("CdmLicense::ExtractProviderSessionToken: empty license response"); return false; } SignedMessage signed_response; if (!signed_response.ParseFromString(license_response)) { LOGE( "CdmLicense::ExtractProviderSessionToken: unable to parse signed " "license response"); return false; } if (signed_response.type() != SignedMessage::LICENSE) { LOGE("CdmLicense::ExtractProviderSessionToken: unrecognized signed message " "type: %d", signed_response.type()); return false; } License license; if (!license.ParseFromString(signed_response.msg())) { LOGE("CdmLicense::ExtractProviderSessionToken: unable to parse license " "response"); return false; } if (license.id().has_provider_session_token()) { *provider_session_token = license.id().provider_session_token(); return true; } return false; } CdmResponseType CdmLicense::HandleKeyErrorResponse( const SignedMessage& signed_message) { LicenseError license_error; if (!license_error.ParseFromString(signed_message.msg())) { LOGE("CdmLicense::HandleKeyErrorResponse: Unable to parse license error"); return KEY_ERROR; } switch (license_error.error_code()) { case LicenseError::INVALID_DRM_DEVICE_CERTIFICATE: return NEED_PROVISIONING; case LicenseError::REVOKED_DRM_DEVICE_CERTIFICATE: return DEVICE_REVOKED; case LicenseError::SERVICE_UNAVAILABLE: default: LOGW("CdmLicense::HandleKeyErrorResponse: Unknown error type = %d", license_error.error_code()); return KEY_ERROR; } } // Return the ClientIdentification message token type for license request. // NOTE: an OEM Cert should never be presented to the provisioning server. bool CdmLicense::GetClientTokenType( ClientIdentification::TokenType* token_type) { switch (client_token_type_) { case kClientTokenKeybox: *token_type = ClientIdentification::KEYBOX; return true; case kClientTokenDrmCert: *token_type = ClientIdentification::DRM_DEVICE_CERTIFICATE; return true; case kClientTokenOemCert: default: // shouldn't happen LOGE("GetClientTokenType: BAD TOKEN TYPE"); return false; } } CdmResponseType CdmLicense::PrepareClientId( const CdmAppParameterMap& app_parameters, LicenseRequest* license_request) { ClientIdentification* client_id = license_request->mutable_client_id(); ClientIdentification::TokenType token_type; if (!GetClientTokenType(&token_type)) { return LICENSING_CLIENT_TOKEN_ERROR_1; } client_id->set_type(token_type); client_id->set_token(client_token_); ClientIdentification_NameValue* client_info; CdmAppParameterMap::const_iterator iter; for (iter = app_parameters.begin(); iter != app_parameters.end(); iter++) { client_info = client_id->add_client_info(); client_info->set_name(iter->first); client_info->set_value(iter->second); } std::string value; if (Properties::GetCompanyName(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kCompanyNameKey); client_info->set_value(value); } if (Properties::GetModelName(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kModelNameKey); client_info->set_value(value); } if (Properties::GetArchitectureName(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kArchitectureNameKey); client_info->set_value(value); } if (Properties::GetDeviceName(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kDeviceNameKey); client_info->set_value(value); } if (Properties::GetProductName(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kProductNameKey); client_info->set_value(value); } if (Properties::GetBuildInfo(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kBuildInfoKey); client_info->set_value(value); } if (!device_id_.empty()) { client_info = client_id->add_client_info(); client_info->set_name(kDeviceIdKey); client_info->set_value(b2a_hex(device_id_)); } else if (crypto_session_->GetInternalDeviceUniqueId(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kDeviceIdKey); client_info->set_value(value); } if (Properties::GetWVCdmVersion(&value)) { client_info = client_id->add_client_info(); client_info->set_name(kWVCdmVersionKey); client_info->set_value(value); } client_info = client_id->add_client_info(); client_info->set_name(kOemCryptoSecurityPatchLevelKey); std::stringstream ss; ss << (uint32_t)crypto_session_->GetSecurityPatchLevel(); client_info->set_value(ss.str()); ClientIdentification_ClientCapabilities* client_capabilities = client_id->mutable_client_capabilities(); bool supports_usage_information; if (crypto_session_->UsageInformationSupport(&supports_usage_information)) { client_capabilities->set_session_token(supports_usage_information); } client_capabilities->set_anti_rollback_usage_table( crypto_session_->IsAntiRollbackHwPresent()); uint32_t api_version = 0; if (crypto_session_->GetApiVersion(&api_version)) { client_capabilities->set_oem_crypto_api_version(api_version); } CryptoSession::HdcpCapability current_version, max_version; if (crypto_session_->GetHdcpCapabilities(¤t_version, &max_version)) { switch (max_version) { case HDCP_NONE: client_capabilities->set_max_hdcp_version( video_widevine:: ClientIdentification_ClientCapabilities_HdcpVersion_HDCP_NONE); break; case HDCP_V1: client_capabilities->set_max_hdcp_version( video_widevine:: ClientIdentification_ClientCapabilities_HdcpVersion_HDCP_V1); break; case HDCP_V2: client_capabilities->set_max_hdcp_version( video_widevine:: ClientIdentification_ClientCapabilities_HdcpVersion_HDCP_V2); break; case HDCP_V2_1: client_capabilities->set_max_hdcp_version( video_widevine:: ClientIdentification_ClientCapabilities_HdcpVersion_HDCP_V2_1); break; case HDCP_V2_2: client_capabilities->set_max_hdcp_version( video_widevine:: ClientIdentification_ClientCapabilities_HdcpVersion_HDCP_V2_2); break; case HDCP_NO_DIGITAL_OUTPUT: client_capabilities->set_max_hdcp_version( video_widevine:: ClientIdentification_ClientCapabilities_HdcpVersion_HDCP_NO_DIGITAL_OUTPUT); break; default: LOGW( "CdmLicense::PrepareClientId: unexpected HDCP max capability " "version %d", max_version); } } CryptoSession::SupportedCertificateTypes supported_certs; if (crypto_session_->GetSupportedCertificateTypes(&supported_certs)) { if (supported_certs.rsa_2048_bit) { client_capabilities->add_supported_certificate_key_type( video_widevine:: ClientIdentification_ClientCapabilities_CertificateKeyType_RSA_2048); } if (supported_certs.rsa_3072_bit) { client_capabilities->add_supported_certificate_key_type( video_widevine:: ClientIdentification_ClientCapabilities_CertificateKeyType_RSA_3072); } } client_capabilities->set_can_update_srm( crypto_session_->IsSrmUpdateSupported()); uint16_t srm_version; if (crypto_session_->GetSrmVersion(&srm_version)) client_capabilities->set_srm_version(srm_version); if (Properties::UsePrivacyMode(session_id_)) { if (service_certificate_->certificate().empty()) { LOGE("CdmLicense::PrepareClientId: Service Certificate not staged"); return PRIVACY_MODE_ERROR_3; } EncryptedClientIdentification* encrypted_client_id = license_request->mutable_encrypted_client_id(); CdmResponseType status; status = service_certificate_->EncryptClientId(crypto_session_, client_id, encrypted_client_id); if (NO_ERROR == status) { license_request->clear_client_id(); } else { license_request->clear_encrypted_client_id(); } return status; } return NO_ERROR; } CdmResponseType CdmLicense::PrepareContentId( const InitializationData& init_data, CdmLicenseType license_type, const std::string& request_id, LicenseRequest* license_request) { // Content Identification may be a cenc_id, a webm_id or a license_id LicenseRequest_ContentIdentification* content_id = license_request->mutable_content_id(); if (init_data.is_cenc() || init_data.is_hls()) { LicenseRequest_ContentIdentification_CencDeprecated* cenc_content_id = content_id->mutable_cenc_id_deprecated(); if (!init_data.IsEmpty()) { cenc_content_id->add_pssh(init_data.data()); } else { LOGE("CdmLicense::PrepareContentId: ISO-CENC init data not available"); return CENC_INIT_DATA_UNAVAILABLE; } if (!SetTypeAndId(license_type, request_id, cenc_content_id)) { return PREPARE_CENC_CONTENT_ID_FAILED; } } else if (init_data.is_webm()) { LicenseRequest_ContentIdentification_WebmDeprecated* webm_content_id = content_id->mutable_webm_id_deprecated(); if (!init_data.IsEmpty()) { webm_content_id->set_header(init_data.data()); } else { LOGE("CdmLicense::PrepareContentId: WebM init data not available"); return WEBM_INIT_DATA_UNAVAILABLE; } if (!SetTypeAndId(license_type, request_id, webm_content_id)) { return PREPARE_WEBM_CONTENT_ID_FAILED; } } else { LOGE("CdmLicense::PrepareContentId: no support for init data type (%s)", init_data.type().c_str()); return UNSUPPORTED_INIT_DATA_FORMAT; } return NO_ERROR; } template bool CdmLicense::SetTypeAndId(CdmLicenseType license_type, const std::string& request_id, T* content_id) { switch (license_type) { case kLicenseTypeOffline: content_id->set_license_type(video_widevine::OFFLINE); break; case kLicenseTypeStreaming: case kLicenseTypeTemporary: content_id->set_license_type(video_widevine::STREAMING); break; default: LOGD("CdmLicense::PrepareKeyRequest: Unknown license type = %d", license_type); return false; } content_id->set_request_id(request_id); return true; } } // namespace wvcdm