219 lines
8.1 KiB
C++
219 lines
8.1 KiB
C++
// Copyright 2012 Google Inc. All Rights Reserved.
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#ifndef WVCDM_CORE_CDM_SESSION_H_
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#define WVCDM_CORE_CDM_SESSION_H_
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#include <set>
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#include <string>
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#include <vector>
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#include "crypto_session.h"
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#include "device_files.h"
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#include "file_store.h"
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#include "initialization_data.h"
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#include "license.h"
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#include "oemcrypto_adapter.h"
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#include "policy_engine.h"
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#include "scoped_ptr.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 ServiceCertificate;
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class WvCdmEventListener;
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class CdmSession {
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public:
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CdmSession(FileSystem* file_system);
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virtual ~CdmSession();
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void Close() { closed_ = true; }
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bool IsClosed() { return closed_; }
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virtual CdmResponseType Init(CdmClientPropertySet* cdm_client_property_set);
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virtual CdmResponseType Init(ServiceCertificate* service_certificate,
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CdmClientPropertySet* cdm_client_property_set,
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const CdmSessionId* forced_session_id,
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WvCdmEventListener* event_listener);
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virtual CdmResponseType RestoreOfflineSession(
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const CdmKeySetId& key_set_id, const CdmLicenseType license_type);
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virtual CdmResponseType RestoreUsageSession(
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const CdmKeyMessage& key_request, const CdmKeyResponse& key_response);
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virtual const CdmSessionId& session_id() { return session_id_; }
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virtual const CdmKeySetId& key_set_id() { return key_set_id_; }
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virtual CdmResponseType GenerateKeyRequest(
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const InitializationData& init_data, CdmLicenseType license_type,
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const CdmAppParameterMap& app_parameters, CdmKeyRequest* key_request);
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// AddKey() - Accept license response and extract key info.
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virtual CdmResponseType AddKey(const CdmKeyResponse& key_response);
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// Query session status
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virtual CdmResponseType QueryStatus(CdmQueryMap* query_response);
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// Query license information
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virtual CdmResponseType QueryKeyStatus(CdmQueryMap* query_response);
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// Query allowed usages for key
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virtual CdmResponseType QueryKeyAllowedUsage(const std::string& key_id,
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CdmKeyAllowedUsage* key_usage);
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// Query OEMCrypto session ID
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virtual CdmResponseType QueryOemCryptoSessionId(CdmQueryMap* query_response);
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// Decrypt() - Accept encrypted buffer and return decrypted data.
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virtual CdmResponseType Decrypt(const CdmDecryptionParameters& parameters);
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// License renewal
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// GenerateRenewalRequest() - Construct valid renewal request for the current
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// session keys.
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virtual CdmResponseType GenerateRenewalRequest(CdmKeyRequest* key_request);
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// RenewKey() - Accept renewal response and update key info.
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virtual CdmResponseType RenewKey(const CdmKeyResponse& key_response);
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// License release
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// GenerateReleaseRequest() - Construct valid release request for the current
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// session keys.
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virtual CdmResponseType GenerateReleaseRequest(CdmKeyRequest* key_request);
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// ReleaseKey() - Accept response and release key.
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virtual CdmResponseType ReleaseKey(const CdmKeyResponse& key_response);
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virtual bool IsKeyLoaded(const KeyId& key_id);
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virtual int64_t GetDurationRemaining();
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// Used for notifying the Policy Engine of resolution changes
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virtual void NotifyResolution(uint32_t width, uint32_t height);
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virtual void OnTimerEvent(bool update_usage);
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virtual void OnKeyReleaseEvent(const CdmKeySetId& key_set_id);
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virtual void GetApplicationId(std::string* app_id);
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virtual SecurityLevel GetRequestedSecurityLevel() {
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return requested_security_level_;
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}
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virtual CdmSecurityLevel GetSecurityLevel() { return security_level_; }
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// Delete usage information for the list of tokens, |provider_session_tokens|.
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virtual CdmResponseType DeleteMultipleUsageInformation(
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const std::vector<std::string>& provider_session_tokens);
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virtual CdmResponseType UpdateUsageInformation();
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virtual bool is_initial_usage_update() { return is_initial_usage_update_; }
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virtual bool is_usage_update_needed() { return is_usage_update_needed_; }
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virtual void reset_usage_flags() {
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is_initial_usage_update_ = false;
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is_usage_update_needed_ = false;
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}
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virtual bool is_release() { return is_release_; }
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virtual bool is_offline() { return is_offline_; }
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virtual bool is_temporary() { return is_temporary_; }
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virtual bool license_received() { return license_received_; }
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// ReleaseCrypto() - Closes the underlying crypto session but leaves this
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// object alive. It is invalid to call any method that requires a crypto
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// session after calling this. Since calling this renders this object mostly
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// useless, it is preferable to simply delete this object (which will also
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// release the underlying crypto session) rather than call this method.
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virtual CdmResponseType ReleaseCrypto();
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// Delete current license and matching usage record
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bool DeleteLicense();
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// Generate unique ID for each new session.
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CdmSessionId GenerateSessionId();
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// Generic crypto operations - provides basic crypto operations that an
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// application can use outside of content stream processing
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// Encrypts a buffer of app-level data.
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virtual CdmResponseType GenericEncrypt(const std::string& in_buffer,
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const std::string& key_id,
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const std::string& iv,
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CdmEncryptionAlgorithm algorithm,
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std::string* out_buffer);
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// Decrypts a buffer of app-level data.
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virtual CdmResponseType GenericDecrypt(const std::string& in_buffer,
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const std::string& key_id,
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const std::string& iv,
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CdmEncryptionAlgorithm algorithm,
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std::string* out_buffer);
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// Computes the signature for a message.
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virtual CdmResponseType GenericSign(const std::string& message,
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const std::string& key_id,
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CdmSigningAlgorithm algorithm,
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std::string* signature);
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// Verifies the signature on a buffer of app-level data.
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virtual CdmResponseType GenericVerify(const std::string& message,
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const std::string& key_id,
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CdmSigningAlgorithm algorithm,
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const std::string& signature);
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private:
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friend class CdmSessionTest;
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bool GenerateKeySetId(CdmKeySetId* key_set_id);
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CdmResponseType StoreLicense();
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bool StoreLicense(DeviceFiles::LicenseState state);
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// These setters are for testing only. Takes ownership of the pointers.
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void set_license_parser(CdmLicense* license_parser);
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void set_crypto_session(CryptoSession* crypto_session);
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void set_policy_engine(PolicyEngine* policy_engine);
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void set_file_handle(DeviceFiles* file_handle);
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// instance variables
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bool initialized_;
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bool closed_; // Session closed, but final shared_ptr has not been released.
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CdmSessionId session_id_;
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scoped_ptr<CdmLicense> license_parser_;
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scoped_ptr<CryptoSession> crypto_session_;
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scoped_ptr<PolicyEngine> policy_engine_;
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scoped_ptr<DeviceFiles> file_handle_;
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bool license_received_;
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bool is_offline_;
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bool is_release_;
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bool is_temporary_;
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CdmSecurityLevel security_level_;
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SecurityLevel requested_security_level_;
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CdmAppParameterMap app_parameters_;
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// decryption and usage flags
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bool is_initial_decryption_;
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bool has_decrypted_since_last_report_; // ... last report to policy engine.
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bool is_initial_usage_update_;
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bool is_usage_update_needed_;
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// information useful for offline and usage scenarios
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CdmKeyMessage key_request_;
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CdmKeyResponse key_response_;
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// license type offline related information
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CdmInitData offline_init_data_;
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CdmKeyMessage offline_key_renewal_request_;
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CdmKeyResponse offline_key_renewal_response_;
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std::string offline_release_server_url_;
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// license type release and offline related information
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CdmKeySetId key_set_id_;
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bool mock_license_parser_in_use_;
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bool mock_policy_engine_in_use_;
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CORE_DISALLOW_COPY_AND_ASSIGN(CdmSession);
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};
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} // namespace wvcdm
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#endif // WVCDM_CORE_CDM_SESSION_H_
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