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// ----------------------------------------------------------------------------
// license_protocol.proto
// ----------------------------------------------------------------------------
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Description:
// Definitions of the protocol buffer messages used in the Widevine license
// exchange protocol.
syntax = "proto2";
package video_widevine_server.sdk;
// need this if we are using libprotobuf-cpp-2.3.0-lite
option optimize_for = LITE_RUNTIME;
enum LicenseType {
STREAMING = 1;
OFFLINE = 2;
}
// LicenseIdentification is propagated from LicenseRequest to License,
// incrementing version with each iteration.
message LicenseIdentification {
optional bytes request_id = 1;
optional bytes session_id = 2;
optional bytes purchase_id = 3;
optional LicenseType type = 4;
optional int32 version = 5;
optional bytes provider_session_token = 6;
}
message License {
message Policy {
// Indicates that playback of the content is allowed.
optional bool can_play = 1 [default = false];
// Indicates that the license may be persisted to non-volatile
// storage for offline use.
optional bool can_persist = 2 [default = false];
// Indicates that renewal of this license is allowed.
optional bool can_renew = 3 [default = false];
// For the |*duration*| fields, playback must halt when
// license_start_time (seconds since the epoch (UTC)) +
// license_duration_seconds is exceeded. A value of 0
// indicates that there is no limit to the duration.
// Indicates the rental window.
optional int64 rental_duration_seconds = 4 [default = 0];
// Indicates the viewing window, once playback has begun.
optional int64 playback_duration_seconds = 5 [default = 0];
// Indicates the time window for this specific license.
optional int64 license_duration_seconds = 6 [default = 0];
// The |renewal*| fields only apply if |can_renew| is true.
// The window of time, in which playback is allowed to continue while
// renewal is attempted, yet unsuccessful due to backend problems with
// the license server.
optional int64 renewal_recovery_duration_seconds = 7 [default = 0];
// All renewal requests for this license shall be directed to the
// specified URL.
optional string renewal_server_url = 8;
// How many seconds after license_start_time, before renewal is first
// attempted.
optional int64 renewal_delay_seconds = 9 [default = 0];
// Specifies the delay in seconds between subsequent license
// renewal requests, in case of failure.
optional int64 renewal_retry_interval_seconds = 10 [default = 0];
// Indicates that the license shall be sent for renewal when usage is
// started.
optional bool renew_with_usage = 11 [default = false];
// Indicates to client that license renewal and release requests ought to
// include ClientIdentification (client_id).
optional bool renew_with_client_id = 12 [default = false];
}
message KeyContainer {
enum KeyType {
// Exactly one key of this type must appear.
SIGNING = 1;
CONTENT = 2;
KEY_CONTROL = 3;
OPERATOR_SESSION = 4;
}
// The SecurityLevel enumeration allows the server to communicate the level
// of robustness required by the client, in order to use the key.
enum SecurityLevel {
// Software-based whitebox crypto is required.
SW_SECURE_CRYPTO = 1;
// Software crypto and an obfuscated decoder is required.
SW_SECURE_DECODE = 2;
// The key material and crypto operations must be performed within a
// hardware backed trusted execution environment.
HW_SECURE_CRYPTO = 3;
// The crypto and decoding of content must be performed within a hardware
// backed trusted execution environment.
HW_SECURE_DECODE = 4;
// The crypto, decoding and all handling of the media (compressed and
// uncompressed) must be handled within a hardware backed trusted
// execution environment.
HW_SECURE_ALL = 5;
}
message KeyControl {
// If present, the key control must be communicated to the secure
// environment prior to any usage. This message is automatically generated
// by the Widevine License Server SDK.
optional bytes key_control_block = 1;
optional bytes iv = 2;
}
message OutputProtection {
// Indicates whether HDCP is required on digital outputs, and which
// version should be used.
enum HDCP {
HDCP_NONE = 0;
HDCP_V1 = 1;
HDCP_V2 = 2;
HDCP_V2_1 = 3;
HDCP_V2_2 = 4;
HDCP_NO_DIGITAL_OUTPUT = 0xff;
}
optional HDCP hdcp = 1 [default = HDCP_NONE];
// Indicate the CGMS setting to be inserted on analog output.
enum CGMS {
CGMS_NONE = 42;
COPY_FREE = 0;
COPY_ONCE = 2;
COPY_NEVER = 3;
}
optional CGMS cgms_flags = 2 [default = CGMS_NONE];
}
message VideoResolutionConstraint {
// Minimum and maximum video resolutions in the range (height x width).
optional uint32 min_resolution_pixels = 1;
optional uint32 max_resolution_pixels = 2;
// Optional output protection requirements for this range. If not
// specified, the OutputProtection in the KeyContainer applies.
optional OutputProtection required_protection = 3;
}
message OperatorSessionKeyPermissions {
// Permissions/key usage flags for operator service keys
// (type = OPERATOR_SESSION).
optional bool allow_encrypt = 1 [default = false];
optional bool allow_decrypt = 2 [default = false];
optional bool allow_sign = 3 [default = false];
optional bool allow_signature_verify = 4 [default = false];
}
optional bytes id = 1;
optional bytes iv = 2;
optional bytes key = 3;
optional KeyType type = 4;
optional SecurityLevel level = 5 [default = SW_SECURE_CRYPTO];
optional OutputProtection required_protection = 6;
// NOTE: Use of requested_protection is not recommended as it is only
// supported on a small number of platforms.
optional OutputProtection requested_protection = 7;
optional KeyControl key_control = 8;
optional OperatorSessionKeyPermissions operator_session_key_permissions = 9;
// Optional video resolution constraints. If the video resolution of the
// content being decrypted/decoded falls within one of the specified ranges,
// the optional required_protections may be applied. Otherwise an error will
// be reported.
// NOTE: Use of this feature is not recommended, as it is only supported on
// a small number of platforms.
repeated VideoResolutionConstraint video_resolution_constraints = 10;
// Optional flag to indicate the key must only be used if the client
// supports anti rollback of the user table. Content provider can query the
// client capabilities to determine if the client support this feature.
optional bool anti_rollback_usage_table = 11 [default = false];
}
optional LicenseIdentification id = 1;
optional Policy policy = 2;
repeated KeyContainer key = 3;
optional int64 license_start_time = 4;
optional bool remote_attestation_verified = 5 [default = false];
// Client token generated by the content provider. Optional.
optional bytes provider_client_token = 6;
}
enum ProtocolVersion {
VERSION_2_0 = 20;
VERSION_2_1 = 21;
}
message LicenseRequest {
message ContentIdentification {
message CENC {
repeated bytes pssh = 1;
optional LicenseType license_type = 2;
optional bytes request_id = 3; // Opaque, client-specified.
}
message WebM {
optional bytes header = 1;
optional LicenseType license_type = 2;
optional bytes request_id = 3; // Opaque, client-specified.
}
message ExistingLicense {
optional LicenseIdentification license_id = 1;
optional int64 seconds_since_started = 2;
optional int64 seconds_since_last_played = 3;
optional bytes session_usage_table_entry = 4;
}
// Exactly one of these must be present.
optional CENC cenc_id = 1;
optional WebM webm_id = 2;
optional ExistingLicense license = 3;
}
enum RequestType {
NEW = 1;
RENEWAL = 2;
RELEASE = 3;
}
// The client_id provides information authenticating the calling device. It
// contains the Widevine keybox token that was installed on the device at the
// factory. This field or encrypted_client_id below is required for a valid
// license request, but both should never be present in the same request.
optional ClientIdentification client_id = 1;
optional ContentIdentification content_id = 2;
optional RequestType type = 3;
optional int64 request_time = 4;
// Old-style decimal-encoded string key control nonce.
optional bytes key_control_nonce_deprecated = 5;
optional ProtocolVersion protocol_version = 6 [default = VERSION_2_0];
// New-style uint32 key control nonce, please use instead of
// key_control_nonce_deprecated.
optional uint32 key_control_nonce = 7;
// Encrypted ClientIdentification message, used for privacy purposes.
optional EncryptedClientIdentification encrypted_client_id = 8;
}
message LicenseError {
enum Error {
// The device credentials are invalid. The device must re-provision.
INVALID_DEVICE_CERTIFICATE = 1;
// The device credentials have been revoked. Re-provisioning is not
// possible.
REVOKED_DEVICE_CERTIFICATE = 2;
// The service is currently unavailable due to the backend being down
// or similar circumstances.
SERVICE_UNAVAILABLE = 3;
}
optional Error error_code = 1;
}
message RemoteAttestation {
// Encrypted ClientIdentification message containing the device remote
// attestation certificate. Required.
optional EncryptedClientIdentification certificate = 1;
// Bytes of salt which were added to the remote attestation challenge prior to
// signing it. Required.
optional bytes salt = 2;
// Signed remote attestation challenge + salt. Required.
optional bytes signature = 3;
}
message SignedMessage {
enum MessageType {
LICENSE_REQUEST = 1;
LICENSE = 2;
ERROR_RESPONSE = 3;
SERVICE_CERTIFICATE_REQUEST = 4;
SERVICE_CERTIFICATE = 5;
}
optional MessageType type = 1;
optional bytes msg = 2;
optional bytes signature = 3;
optional bytes session_key = 4;
// Remote attestation data which will be present in the initial license
// request for ChromeOS client devices operating in verified mode. Remote
// attestation challenge data is |msg| field above. Optional.
optional RemoteAttestation remote_attestation = 5;
}
// ----------------------------------------------------------------------------
// certificate_provisioning.proto
// ----------------------------------------------------------------------------
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Description:
// Public protocol buffer definitions for Widevine Device Certificate
// Provisioning protocol.
// ProvisioningOptions specifies the type of certificate to specify and
// in the case of X509 certificates, the certificate authority to use.
message ProvisioningOptions {
enum CertificateType {
WIDEVINE_DRM = 0; // Default. The original certificate type.
X509 = 1; // X.509 certificate.
}
optional CertificateType certificate_type = 1;
// It is recommended that the certificate_authority specify the X.509
// Subject of the signing certificate.
optional string certificate_authority = 2;
}
// Provisioning request sent by client devices to provisioning service.
message ProvisioningRequest {
// Device root of trust and other client identification. Required.
optional ClientIdentification client_id = 1;
// Nonce value used to prevent replay attacks. Required.
optional bytes nonce = 2;
// Options for type of certificate to generate. Optional.
optional ProvisioningOptions options = 3;
// Stable identifier, unique for each device + application (or origin).
// Required if doing per-origin provisioning.
optional bytes stable_id = 4;
}
// Provisioning response sent by the provisioning server to client devices.
message ProvisioningResponse {
// AES-128 encrypted device private RSA key. PKCS#1 ASN.1 DER-encoded.
// Required.
optional bytes device_rsa_key = 1;
// Initialization vector used to encrypt device_rsa_key. Required.
optional bytes device_rsa_key_iv = 2;
// Serialized SignedDeviceCertificate. Required.
optional bytes device_certificate = 3;
// Nonce value matching nonce in ProvisioningRequest. Required.
optional bytes nonce = 4;
}
// Serialized ProvisioningRequest or ProvisioningResponse signed with
// The message authentication key.
message SignedProvisioningMessage {
// Serialized ProvisioningRequest or ProvisioningResponse. Required.
optional bytes message = 1;
// HMAC-SHA256 signature of message. Required.
optional bytes signature = 2;
}
// ----------------------------------------------------------------------------
// client_identification.proto
// ----------------------------------------------------------------------------
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Description:
// ClientIdentification messages used by provisioning and license protocols.
// ClientIdentification message used to authenticate the client device.
message ClientIdentification {
enum TokenType {
KEYBOX = 0;
DEVICE_CERTIFICATE = 1;
REMOTE_ATTESTATION_CERTIFICATE = 2;
}
message NameValue {
optional string name = 1;
optional string value = 2;
}
// Capabilities which not all clients may support. Used for the license
// exchange protocol only.
message ClientCapabilities {
enum HdcpVersion {
HDCP_NONE = 0;
HDCP_V1 = 1;
HDCP_V2 = 2;
HDCP_V2_1 = 3;
HDCP_V2_2 = 4;
HDCP_NO_DIGITAL_OUTPUT = 0xff;
}
optional bool client_token = 1 [default = false];
optional bool session_token = 2 [default = false];
optional bool video_resolution_constraints = 3 [default = false];
optional HdcpVersion max_hdcp_version = 4 [default = HDCP_NONE];
optional uint32 oem_crypto_api_version = 5;
optional bool anti_rollback_usage_table = 6 [default = false];
}
// Type of factory-provisioned device root of trust. Optional.
optional TokenType type = 1 [default = KEYBOX];
// Factory-provisioned device root of trust. Required.
optional bytes token = 2;
// Optional client information name/value pairs.
repeated NameValue client_info = 3;
// Client token generated by the content provider. Optional.
optional bytes provider_client_token = 4;
// Number of licenses received by the client to which the token above belongs.
// Only present if client_token is specified.
optional uint32 license_counter = 5;
// List of non-baseline client capabilities.
optional ClientCapabilities client_capabilities = 6;
}
// EncryptedClientIdentification message used to hold ClientIdentification
// messages encrypted for privacy purposes.
message EncryptedClientIdentification {
// Service ID for which the ClientIdentifcation is encrypted (owner of service
// certificate).
optional string service_id = 1;
// Serial number for the service certificate for which ClientIdentification is
// encrypted.
optional bytes service_certificate_serial_number = 2;
// Serialized ClientIdentification message, encrypted with the privacy key using
// AES-128-CBC with PKCS#5 padding.
optional bytes encrypted_client_id = 3;
// Initialization vector needed to decrypt encrypted_client_id.
optional bytes encrypted_client_id_iv = 4;
// AES-128 privacy key, encrytped with the service public public key using
// RSA-OAEP.
optional bytes encrypted_privacy_key = 5;
}
// ----------------------------------------------------------------------------
// device_certificate.proto
// ----------------------------------------------------------------------------
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Description:
// Device certificate and certificate status list format definitions.
// Certificate definition for user devices, intermediate, service, and root
// certificates.
message DeviceCertificate {
enum CertificateType {
ROOT = 0;
INTERMEDIATE = 1;
USER_DEVICE = 2;
SERVICE = 3;
}
// Type of certificate. Required.
optional CertificateType type = 1;
// 128-bit globally unique serial number of certificate.
// Value is 0 for root certificate. Required.
optional bytes serial_number = 2;
// POSIX time, in seconds, when the certificate was created. Required.
optional uint32 creation_time_seconds = 3;
// Device public key. PKCS#1 ASN.1 DER-encoded. Required.
optional bytes public_key = 4;
// Widevine system ID for the device. Required for intermediate and
// user device certificates.
optional uint32 system_id = 5;
// Deprecated field, which used to indicate whether the device was a test
// (non-production) device. The test_device field in ProvisionedDeviceInfo
// below should be observed instead.
optional bool test_device_deprecated = 6 [deprecated = true];
// Service identifier (web origin) for the service which owns the certificate.
// Required for service certificates.
optional string service_id = 7;
}
// DeviceCertificate signed with intermediate or root certificate private key.
message SignedDeviceCertificate {
// Serialized DeviceCertificate. Required.
optional bytes device_certificate = 1;
// Signature of device_certificate. Signed with root or intermediate
// certificate private key using RSASSA-PSS. Required.
optional bytes signature = 2;
// Intermediate signing certificate. Present only for user device
// certificates. All others signed with root certificate private key.
optional SignedDeviceCertificate signer = 3;
}
// Contains device model information for a provisioned device.
message ProvisionedDeviceInfo {
enum WvSecurityLevel {
// Defined in "WV Modular DRM Security Integration Guide for
// Common Encryption (CENC)"
LEVEL_UNSPECIFIED = 0;
LEVEL_1 = 1;
LEVEL_2 = 2;
LEVEL_3 = 3;
}
// Widevine system ID for the device. Mandatory.
optional uint32 system_id = 1;
// Name of system-on-a-chip. Optional.
optional string soc = 2;
// Name of manufacturer. Optional.
optional string manufacturer = 3;
// Manufacturer's model name. Matches "brand" in device metadata. Optional.
optional string model = 4;
// Type of device (Phone, Tablet, TV, etc).
optional string device_type = 5;
// Device model year. Optional.
optional uint32 model_year = 6;
// Widevine-defined security level. Optional.
optional WvSecurityLevel security_level = 7 [default = LEVEL_UNSPECIFIED];
// True if the certificate corresponds to a test (non production) device.
// Optional.
optional bool test_device = 8 [default = false];
}
// Contains the status of the root or an intermediate DeviceCertificate.
message DeviceCertificateStatus {
enum CertificateStatus {
VALID = 0;
REVOKED = 1;
};
// Serial number of the DeviceCertificate to which this message refers.
// Required.
optional bytes serial_number = 1;
// Status of the certificate. Optional.
optional CertificateStatus status = 2 [default = VALID];
// Device model information about the device to which the certificate
// corresponds. Required.
optional ProvisionedDeviceInfo device_info = 4;
}
// List of DeviceCertificateStatus. Used to propagate certificate revocation and
// update list.
message DeviceCertificateStatusList {
// POSIX time, in seconds, when the list was created. Required.
optional uint32 creation_time_seconds = 1;
// DeviceCertificateStatus for each certifificate.
repeated DeviceCertificateStatus certificate_status = 2;
}
// Signed CertificateStatusList
message SignedCertificateStatusList {
// Serialized DeviceCertificateStatusList. Required.
optional bytes certificate_status_list = 1;
// Signature of certificate_status_list. Signed with root certificate private
// key using RSASSA-PSS. Required.
optional bytes signature = 2;
}