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platform_hardware_interfaces/drm/1.0/IDrmPlugin.hal
Jeff Tinker da002fe641 Reorganize drm hal modules 
Previously the drm and crypto plugins were separate hals.
This implied a separation of implementation libraries which
causes problems for some drm schemes. The reorganization
combines the hals into a single interface under drm.

Tests: basic gtests passing

Change-Id: I5cde6ff9f60625a0219731c4dbfcaefbd9f27f88
related-to-bug: 32815560
2017-01-20 10:48:50 -08:00

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/**
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.hardware.drm@1.0;
import IDrmPluginListener;
/**
* Ref: frameworks/native/include/media/drm/DrmAPI.h:DrmPlugin
*
* IDrmPlugin is used to interact with a specific drm plugin that was
* created by IDrm::createPlugin. A drm plugin provides methods for
* obtaining drm keys that may be used by a codec to decrypt protected
* video content.
*/
interface IDrmPlugin {
/**
* Open a new session with the DrmPlugin object. A session ID is returned
* in the sessionId parameter.
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_NOT_PROVISIONED if the device requires
* provisioning before it can open a session, ERROR_DRM_RESOURCE_BUSY if
* there are insufficent resources available to open a session,
* ERROR_DRM_CANNOT_HANDLE, if openSession is not supported at the time of
* the call or ERROR_DRM_INVALID_STATE if the HAL is in a state where a
* session cannot be opened.
* @return sessionId the session ID for the newly opened session
*/
openSession() generates (Status status, SessionId sessionId);
/**
* Close a session on the DrmPlugin object
*
* @param sessionId the session id the call applies to
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if the sessionId is invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the session cannot be closed.
*/
closeSession(SessionId sessionId) generates (Status status);
/**
* A key request/response exchange occurs between the app and a License
* Server to obtain the keys required to decrypt the content.
* getKeyRequest() is used to obtain an opaque key request blob that is
* delivered to the license server.
*
* @param scope may be a sessionId or a keySetId, depending on the
* specified keyType. When the keyType is OFFLINE or STREAMING,
* scope should be set to the sessionId the keys will be provided to.
* When the keyType is RELEASE, scope should be set to the keySetId
* of the keys being released.
* @param initData container-specific data, its meaning is interpreted
* based on the mime type provided in the mimeType parameter. It could
* contain, for example, the content ID, key ID or other data obtained
* from the content metadata that is required to generate the key request.
* initData may be empty when keyType is RELEASE.
* @param mimeType identifies the mime type of the content
* @param keyType specifies if the keys are to be used for streaming,
* offline or a release
* @param optionalParameters included in the key request message to
* allow a client application to provide additional message parameters to
* the server.
*
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, ERROR_DRM_NOT_PROVISIONED if the device requires provisioning
* before it can generate a key request, ERROR_DRM_CANNOT_HANDLE if
* getKeyRequest is not supported at the time of the call, BAD_VALUE if any
* parameters are invalid or ERROR_DRM_INVALID_STATE if the HAL is in a state
* where a key request cannot be generated.
* @return request if successful, the opaque key request blob is returned
* @return requestType indicates type information about the returned
* request. The type may be one of INITIAL, RENEWAL or RELEASE. An
* INITIAL request is the first key request for a license. RENEWAL is a
* subsequent key request used to refresh the keys in a license. RELEASE
* corresponds to a keyType of RELEASE, which indicates keys are being
* released.
* @return defaultUrl the URL that the request may be sent to, if
* provided by the drm HAL. The app may choose to override this
* URL.
*/
getKeyRequest(vec<uint8_t> scope, vec<uint8_t> initData,
string mimeType, KeyType keyType, KeyedVector optionalParameters)
generates (Status status, vec<uint8_t> request,
KeyRequestType requestType, string defaultUrl);
/**
* After a key response is received by the app, it is provided to the
* Drm plugin using provideKeyResponse.
*
* @param scope may be a sessionId or a keySetId depending on the type
* of the response. Scope should be set to the sessionId when the response
* is for either streaming or offline key requests. Scope should be set to
* the keySetId when the response is for a release request.
* @param response the response from the key server that is being
* provided to the drm HAL.
*
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, ERROR_DRM_NOT_PROVISIONED if the device requires provisioning
* before it can handle the key response, ERROR_DRM_DEVICE_REVOKED if the
* device has been disabled by the license policy, ERROR_DRM_CANNOT_HANDLE
* if provideKeyResponse is not supported at the time of the call, BAD_VALUE
* if any parameters are invalid or ERROR_DRM_INVALID_STATE if the HAL is
* in a state where a key response cannot be handled.
* @return keySetId when the response is for an offline key request, a
* keySetId is returned in the keySetId vector parameter that can be used
* to later restore the keys to a new session with the method restoreKeys.
* When the response is for a streaming or release request, no keySetId is
* returned.
*/
provideKeyResponse(vec<uint8_t> scope, vec<uint8_t> response)
generates (Status status, vec<uint8_t> keySetId);
/**
* Remove the current keys from a session
*
* @param sessionId the session id the call applies to
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if the sessionId is invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the keys cannot be removed.
*/
removeKeys(SessionId sessionId) generates (Status status);
/**
* Restore persisted offline keys into a new session
*
* @param sessionId the session id the call applies to
* @param keySetId identifies the keys to load, obtained from a prior
* call to provideKeyResponse().
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if any parameters are invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where keys cannot be restored.
*/
restoreKeys(SessionId sessionId,
vec<uint8_t> keySetId) generates (Status status);
/**
* Request an informative description of the license for the session. The
* status is in the form of {name, value} pairs. Since DRM license policies
* vary by vendor, the specific status field names are determined by each
* DRM vendor. Refer to your DRM provider documentation for definitions of
* the field names for a particular drm scheme.
*
* @param sessionId the session id the call applies to
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if the sessionId is invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where key status cannot be queried.
* @return infoList a list of name value pairs describing the license
*/
queryKeyStatus(SessionId sessionId)
generates (Status status, KeyedVector infoList);
/**
* A provision request/response exchange occurs between the app and a
* provisioning server to retrieve a device certificate. getProvisionRequest
* is used to obtain an opaque provisioning request blob that is delivered
* to the provisioning server.
*
* @param certificateType the type of certificate requested, e.g. "X.509"
* @param certificateAuthority identifies the certificate authority. A
* certificate authority (CA) is an entity which issues digital certificates
* for use by other parties. It is an example of a trusted third party.
* @return status the status of the call. The status must be OK or one of
* the following errors: BAD_VALUE if the sessionId is invalid or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the provision
* request cannot be generated.
* @return request if successful the opaque certificate request blob
* is returned
* @return defaultUrl URL that the provisioning request should be
* sent to, if known by the HAL implementation. If the HAL implementation
* does not provide a defaultUrl, the returned string must be empty.
*/
getProvisionRequest(string certificateType, string certificateAuthority)
generates (Status status, vec<uint8_t> request, string defaultUrl);
/**
* After a provision response is received by the app from a provisioning
* server, it is provided to the Drm HAL using provideProvisionResponse.
* The HAL implementation must receive the provision request and
* store the provisioned credentials.
*
* @param response the opaque provisioning response received by the
* app from a provisioning server.
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_DEVICE_REVOKED if the device has been
* disabled by the license policy, BAD_VALUE if any parameters are invalid
* or ERROR_DRM_INVALID_STATE if the HAL is in a state where the provision
* response cannot be handled.
* @return certificate the public certificate resulting from the provisioning
* operation, if any. An empty vector indicates that no certificate was
* returned.
* @return wrappedKey an opaque object containing encrypted private key
* material to be used by signRSA when computing an RSA signature on a
* message, see the signRSA method.
*/
provideProvisionResponse(vec<uint8_t> response) generates (Status status,
vec<uint8_t> certificate, vec<uint8_t> wrappedKey);
/**
* SecureStop is a way of enforcing the concurrent stream limit per
* subscriber. It can securely monitor the lifetime of sessions across
* device reboots by periodically persisting the session lifetime
* status in secure storage.
*
* A signed version of the sessionID is written to persistent storage on the
* device when each MediaCrypto object is created and periodically during
* playback. The sessionID is signed by the device private key to prevent
* tampering.
*
* When playback is completed the session is destroyed, and the secure
* stops are queried by the app. The app then delivers the secure stop
* message to a server which verifies the signature to confirm that the
* session and its keys have been removed from the device. The persisted
* record on the device is removed after receiving and verifying the
* signed response from the server.
*/
/**
* Get all secure stops on the device
*
* @return status the status of the call. The status must be OK or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the secure stops
* cannot be returned.
* @return secureStops a list of the secure stop opaque objects
*/
getSecureStops() generates
(Status status, vec<SecureStop> secureStops);
/**
* Get all secure stops by secure stop ID
*
* @param secureStopId the ID of the secure stop to return. The
* secure stop ID is delivered by the key server as part of the key
* response and must also be known by the app.
*
* @return status the status of the call. The status must be OK or one of
* the following errors: BAD_VALUE if the secureStopId is invalid or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the secure stop
* cannot be returned.
* @return secureStop the secure stop opaque object
*/
getSecureStop(SecureStopId secureStopId)
generates (Status status, SecureStop secureStop);
/**
* Release all secure stops on the device
*
* @return status the status of the call. The status must be OK or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the secure
* stops cannot be released.
*/
releaseAllSecureStops() generates (Status status);
/**
* Release a secure stop by secure stop ID
*
* @param secureStopId the ID of the secure stop to release. The
* secure stop ID is delivered by the key server as part of the key
* response and must also be known by the app.
*
* @return status the status of the call. The status must be OK or one of
* the following errors: BAD_VALUE if the secureStopId is invalid or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the secure stop
* cannot be released.
*/
releaseSecureStop(vec<uint8_t> secureStopId) generates (Status status);
/**
* A drm scheme can have properties that are settable and readable
* by an app. There are a few forms of property access methods,
* depending on the data type of the property.
*
* Property values defined by the public API are:
* "vendor" [string] identifies the maker of the drm scheme
* "version" [string] identifies the version of the drm scheme
* "description" [string] describes the drm scheme
* 'deviceUniqueId' [byte array] The device unique identifier is
* established during device provisioning and provides a means of
* uniquely identifying each device.
*
* Since drm scheme properties may vary, additional field names may be
* defined by each DRM vendor. Refer to your DRM provider documentation
* for definitions of its additional field names.
*/
/**
* Read a string property value given the property name.
*
* @param propertyName the name of the property
* @return status the status of the call. The status must be OK or one of
* the following errors: BAD_VALUE if the property name is invalid,
* ERROR_DRM_CANNOT_HANDLE if the property is not supported, or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the property
* cannot be obtained.
* @return value the property value string
*/
getPropertyString(string propertyName)
generates (Status status, string value);
/**
* Read a byte array property value given the property name.
*
* @param propertyName the name of the property
* @return status the status of the call. The status must be OK or one of
* the following errors: BAD_VALUE if the property name is invalid,
* ERROR_DRM_CANNOT_HANDLE if the property is not supported, or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the property
* cannot be obtained.
* @return value the property value byte array
*/
getPropertyByteArray(string propertyName)
generates (Status status, vec<uint8_t> value);
/**
* Write a property string value given the property name
*
* @param propertyName the name of the property
* @param value the value to write
* @return status the status of the call. The status must be OK or one of
* the following errors: BAD_VALUE if the property name is invalid,
* ERROR_DRM_CANNOT_HANDLE if the property is not supported, or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the property
* cannot be set.
*/
setPropertyString(string propertyName, string value)
generates (Status status);
/**
* Write a property byte array value given the property name
*
* @param propertyName the name of the property
* @param value the value to write
* @return status the status of the call. The status must be OK or one of
* the following errors: BAD_VALUE if the property name is invalid,
* ERROR_DRM_CANNOT_HANDLE if the property is not supported, or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the property
* cannot be set.
*/
setPropertyByteArray(string propertyName, vec<uint8_t> value )
generates (Status status);
/**
* The following methods implement operations on a CryptoSession to support
* encrypt, decrypt, sign verify operations on operator-provided
* session keys.
*/
/**
* Set the cipher algorithm to be used for the specified session.
*
* @param sessionId the session id the call applies to
* @param algorithm the algorithm to use. The string conforms to JCA
* Standard Names for Cipher Transforms and is case insensitive. An
* example algorithm is "AES/CBC/PKCS5Padding".
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if any parameters are invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the algorithm cannot be set.
*/
setCipherAlgorithm(SessionId sessionId, string algorithm)
generates (Status status);
/**
* Set the MAC algorithm to be used for computing hashes in a session.
*
* @param sessionId the session id the call applies to
* @param algorithm the algorithm to use. The string conforms to JCA
* Standard Names for Mac Algorithms and is case insensitive. An example MAC
* algorithm string is "HmacSHA256".
* @return status the status of the call. The status must be OK or one of the
* following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if any parameters are invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the algorithm cannot be set.
*/
setMacAlgorithm(SessionId sessionId, string algorithm)
generates (Status status);
/**
* Encrypt the provided input buffer with the cipher algorithm specified by
* setCipherAlgorithm and the key selected by keyId, and return the
* encrypted data.
*
* @param sessionId the session id the call applies to
* @param keyId the ID of the key to use for encryption
* @param input the input data to encrypt
* @param iv the initialization vector to use for encryption
* @return status the status of the call. The status must be OK or one of the
* following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not opened,
* BAD_VALUE if any parameters are invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the encrypt operation cannot be performed.
* @return output the decrypted data
*/
encrypt(SessionId sessionId, vec<uint8_t> keyId, vec<uint8_t> input,
vec<uint8_t> iv) generates (Status status, vec<uint8_t> output);
/**
* Decrypt the provided input buffer with the cipher algorithm
* specified by setCipherAlgorithm and the key selected by keyId,
* and return the decrypted data.
*
* @param sessionId the session id the call applies to
* @param keyId the ID of the key to use for decryption
* @param input the input data to decrypt
* @param iv the initialization vector to use for decryption
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if any parameters are invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the decrypt operation cannot be
* performed.
* @return output the decrypted data
*/
decrypt(SessionId sessionId, vec<uint8_t> keyId, vec<uint8_t> input,
vec<uint8_t> iv) generates (Status status, vec<uint8_t> output);
/**
* Compute a signature over the provided message using the mac algorithm
* specified by setMacAlgorithm and the key selected by keyId and return
* the signature.
*
* @param sessionId the session id the call applies to
* @param keyId the ID of the key to use for decryption
* @param message the message to compute a signature over
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if any parameters are invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the sign operation cannot be
* performed.
* @return signature the computed signature
*/
sign(SessionId sessionId, vec<uint8_t> keyId, vec<uint8_t> message)
generates (Status status, vec<uint8_t> signature);
/**
* Compute a hash of the provided message using the mac algorithm specified
* by setMacAlgorithm and the key selected by keyId, and compare with the
* expected result.
*
* @param sessionId the session id the call applies to
* @param keyId the ID of the key to use for decryption
* @param message the message to compute a hash of
* @param signature the signature to verify
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is not
* opened, BAD_VALUE if any parameters are invalid or ERROR_DRM_INVALID_STATE
* if the HAL is in a state where the verify operation cannot be
* performed.
* @return match true if the signature is verified positively,
* false otherwise.
*/
verify(SessionId sessionId, vec<uint8_t> keyId, vec<uint8_t> message,
vec<uint8_t> signature) generates (Status status, bool match);
/**
* Compute an RSA signature on the provided message using the specified
* algorithm.
*
* @param sessionId the session id the call applies to
* @param algorithm the signing algorithm, such as "RSASSA-PSS-SHA1"
* or "PKCS1-BlockType1"
* @param message the message to compute the signature on
* @param wrappedKey the private key returned during provisioning as
* returned by provideProvisionResponse.
* @return status the status of the call. The status must be OK or one of
* the following errors: ERROR_DRM_SESSION_NOT_OPENED if the session is
* not opened, BAD_VALUE if any parameters are invalid or
* ERROR_DRM_INVALID_STATE if the HAL is in a state where the signRSA
* operation cannot be performed.
* @return signature the RSA signature computed over the message
*/
signRSA(SessionId sessionId, string algorithm, vec<uint8_t> message,
vec<uint8_t> wrappedkey)
generates (Status status, vec<uint8_t> signature);
/**
* Plugins call the following methods to deliver events to the
* java app.
*/
/**
* Set a listener for a drm session. This allows the drm HAL to
* make asynchronous calls back to the client of IDrm.
*
* @param listener instance of IDrmPluginListener to receive the events
*/
setListener(IDrmPluginListener listener);
/**
* Legacy event sending method, it sends events of various types using a
* single overloaded set of parameters. This form is deprecated.
*
* @param eventType the type of the event
* @param sessionId identifies the session the event originated from
* @param data event-specific data blob
*/
sendEvent(EventType eventType, SessionId sessionId, vec<uint8_t> data);
/**
* Send a license expiration update to the listener. The expiration
* update indicates how long the current license is valid before it
* needs to be renewed.
*
* @param sessionId identifies the session the event originated from
* @param expiryTimeInMS the time when the keys need to be renewed.
* The time is in milliseconds, relative to the Unix epoch. A time of 0
* indicates that the keys never expire.
*/
sendExpirationUpdate(SessionId sessionId, int64_t expiryTimeInMS);
/**
* Send a keys change event to the listener. The keys change event
* indicates the status of each key in the session. Keys can be
* indicated as being usable, expired, outputnotallowed or statuspending.
*
* @param sessionId identifies the session the event originated from
* @param keyStatusList indicates the status for each key ID in the
* session.
* @param hasNewUsableKey indicates if the event includes at least one
* key that has become usable.
*/
sendKeysChange(SessionId sessionId, vec<KeyStatus> keyStatusList,
bool hasNewUsableKey);
};
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