f6c2a60485
This merges the following changes from the Widevine CDM repository: 564f4cc Add CdmClientPropertySet to CDM Adds an interface to the CDM that allows it to query its client for certain properties. In this case, this includes the ability to specify what security level is desired, as well as support for service ceritifcate privacy mode. 9cfbd3e Force Level 3 fallback Adds support for voluntarily invoking L3 crypto to the OEMCrypto wrapper. 95d12c1 Add pointer to CdmClientPropertySet class to OpenSession. Adds support for storing the property set on a session-by-session basis and choosing the appropriate crypto level. 17de442 Add Settable Properties for Clank to Android Adds support for setting the aforementioned properties to the DrmEngine bbe704d Fixes to force fallback to level three security Corrections to invoke provisioning, OEMCrypto API with configured security level rather than the default. Unit tests were also revised. Note that some parts of this are also support for the ability to use a service certificate-based privacy mode. The remaining code for supporting this mode is still forthcoming. Bug: 10109249 Change-Id: I2755e4dea1de3e8a56cff237360298f7b7f1bddc
137 lines
4.9 KiB
C++
137 lines
4.9 KiB
C++
// Copyright 2013 Google Inc. All Rights Reserved.
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#ifndef CDM_BASE_CDM_ENGINE_H_
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#define CDM_BASE_CDM_ENGINE_H_
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#include "certificate_provisioning.h"
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#include "oemcrypto_adapter.h"
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#include "timer.h"
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#include "wv_cdm_types.h"
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namespace wvcdm {
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class CdmClientPropertySet;
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class CdmSession;
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class CryptoEngine;
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class WvCdmEventListener;
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typedef std::map<CdmSessionId, CdmSession*> CdmSessionMap;
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typedef std::map<CdmKeySetId, CdmSessionId> CdmReleaseKeySetMap;
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class CdmEngine : public TimerHandler {
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public:
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CdmEngine();
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virtual ~CdmEngine();
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// Session related methods
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virtual CdmResponseType OpenSession(
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const CdmKeySystem& key_system,
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const CdmClientPropertySet* property_set,
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CdmSessionId* session_id);
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virtual CdmResponseType CloseSession(const CdmSessionId& session_id);
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virtual CdmResponseType OpenKeySetSession(const CdmKeySetId& key_set_id);
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virtual CdmResponseType CloseKeySetSession(const CdmKeySetId& key_set_id);
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// License related methods
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// Construct a valid license request
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virtual CdmResponseType GenerateKeyRequest(const CdmSessionId& session_id,
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const CdmKeySetId& key_set_id,
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const CdmInitData& init_data,
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const CdmLicenseType license_type,
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CdmAppParameterMap& app_parameters,
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CdmKeyMessage* key_request,
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std::string* server_url);
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// Accept license response and extract key info.
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virtual CdmResponseType AddKey(const CdmSessionId& session_id,
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const CdmKeyResponse& key_data,
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CdmKeySetId* key_set_id);
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virtual CdmResponseType RestoreKey(const CdmSessionId& session_id,
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const CdmKeySetId& key_set_id);
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CdmResponseType CancelKeyRequest(const CdmSessionId& session_id);
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// Construct valid renewal request for the current session keys.
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virtual CdmResponseType GenerateRenewalRequest(const CdmSessionId& session_id,
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CdmKeyMessage* key_request,
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std::string* server_url);
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// Accept renewal response and update key info.
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virtual CdmResponseType RenewKey(const CdmSessionId& session_id,
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const CdmKeyResponse& key_data);
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// Query system information
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virtual CdmResponseType QueryStatus(CdmQueryMap* info);
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// Query license information
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virtual CdmResponseType QueryKeyStatus(const CdmSessionId& session_id,
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CdmQueryMap* key_info);
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// Query seesion control information
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virtual CdmResponseType QueryKeyControlInfo(const CdmSessionId& session_id,
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CdmQueryMap* key_info);
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// Provisioning related methods
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virtual CdmResponseType GetProvisioningRequest(
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CdmProvisioningRequest* request,
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std::string* default_url);
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virtual CdmResponseType HandleProvisioningResponse(
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CdmProvisioningResponse& response);
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// Secure stop related methods
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virtual CdmResponseType GetSecureStops(CdmSecureStops* secure_stops);
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virtual CdmResponseType ReleaseSecureStops(
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const CdmSecureStopReleaseMessage& message);
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// Decryption and key related methods
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// Accept encrypted buffer and return decrypted data.
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virtual CdmResponseType Decrypt(const CdmSessionId& session_id,
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const CdmDecryptionParameters& parameters);
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// Is the key known to any session?
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virtual bool IsKeyValid(const KeyId& key_id);
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// Event listener related methods
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virtual bool AttachEventListener(const CdmSessionId& session_id,
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WvCdmEventListener* listener);
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virtual bool DetachEventListener(const CdmSessionId& session_id,
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WvCdmEventListener* listener);
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// Parse a blob of multiple concatenated PSSH atoms to extract the first
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// widevine pssh
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static bool ExtractWidevinePssh(const CdmInitData& init_data,
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CdmInitData* output);
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private:
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// private methods
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// Cancel all sessions
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virtual bool CancelSessions();
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virtual bool ValidateKeySystem(const CdmKeySystem& key_system);
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// timer related methods to drive policy decisions
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virtual void EnablePolicyTimer();
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virtual void DisablePolicyTimer();
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virtual void OnTimerEvent();
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virtual void OnKeyReleaseEvent(const CdmKeySetId& key_set_id);
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// instance variables
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CdmSessionMap sessions_;
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CdmReleaseKeySetMap release_key_sets_;
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CertificateProvisioning cert_provisioning_;
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SecurityLevel cert_provisioning_requested_security_level_;
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// policy timer
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Timer policy_timer_;
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CORE_DISALLOW_COPY_AND_ASSIGN(CdmEngine);
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};
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} // namespace wvcdm
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#endif // CDM_BASE_CDM_ENGINE_H_
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