d29372909d
Fixes a secure buffer addressing offset error in the Widevine CENC drm engine. bug: 8667527 Merges the following from Widevine CDM repository: Allow specification of offset into secure buffer https://widevine-internal-review.googlesource.com/#/c/5100/ Update WVCryptoPlugin to Pass Output Offset as a Separate Parameter https://widevine-internal-review.googlesource.com/#/c/5120/ Add offset to secure data buffer in OEMCrypto DecryptCTR https://widevine-internal-review.googlesource.com/#/c/5110/ Change-Id: Ic3e4b35304c8fbae4aebe4c495285eb787e8c205
110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
// Copyright 2012 Google Inc. All Rights Reserved.
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#ifndef CDM_BASE_CDM_SESSION_H_
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#define CDM_BASE_CDM_SESSION_H_
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#include <set>
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#include "crypto_session.h"
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#include "license.h"
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#include "policy_engine.h"
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#include "wv_cdm_event_listener.h"
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#include "wv_cdm_types.h"
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namespace wvcdm {
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// TODO(kqyang): Do we need it? CdmKey not defined yet
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// typedef std::map<KeyId, CdmKey*> CdmSessionKeys;
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class CdmSession {
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public:
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CdmSession() : session_id_(GenerateSessionId()), license_received_(false) {}
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~CdmSession() {}
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CdmResponseType Init();
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bool DestroySession();
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void set_key_system(const CdmKeySystem& ksystem) { key_system_ = ksystem; }
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const CdmKeySystem& key_system() { return key_system_; }
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const CdmSessionId& session_id() { return session_id_; }
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bool VerifySession(const CdmKeySystem& key_system,
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const CdmInitData& init_data);
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CdmResponseType GenerateKeyRequest(const CdmInitData& pssh_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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// AddKey() - Accept license response and extract key info.
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CdmResponseType AddKey(const CdmKeyResponse& key_response);
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// CancelKeyRequest() - Cancel session.
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CdmResponseType CancelKeyRequest();
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// Query license information
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CdmResponseType QueryKeyStatus(CdmQueryMap* key_info);
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// Query session control info
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CdmResponseType QueryKeyControlInfo(CdmQueryMap* key_info);
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// Decrypt() - Accept encrypted buffer and return decrypted data.
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CdmResponseType Decrypt(bool is_encrypted,
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const KeyId& key_id,
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const uint8_t* encrypt_buffer,
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size_t encrypt_length,
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const std::vector<uint8_t>& iv,
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size_t block_offset,
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void* decrypt_buffer,
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size_t decrypt_buffer_offset,
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bool is_video);
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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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CdmResponseType GenerateRenewalRequest(CdmKeyMessage* key_request);
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// RenewKey() - Accept renewal response and update key info.
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CdmResponseType RenewKey(const CdmKeyResponse& key_response);
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bool IsKeyValid(const KeyId& key_id);
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bool AttachEventListener(WvCdmEventListener* listener);
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bool DetachEventListener(WvCdmEventListener* listener);
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void OnTimerEvent();
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private:
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// Generate unique ID for each new session.
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CdmSessionId GenerateSessionId();
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bool LoadDeviceCertificate(std::string* cert, std::string* wrapped_key);
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// instance variables
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const CdmSessionId session_id_;
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CdmKeySystem key_system_;
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CdmLicense license_parser_;
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CryptoSession* crypto_session_;
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PolicyEngine policy_engine_;
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bool license_received_;
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KeyId key_id_;
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// Used for certificate based licensing
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std::string wrapped_key_;
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std::set<WvCdmEventListener*> listeners_;
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// TODO(kqyang): CdmKey not defined yet
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// CdmSessionKeys session_keys_;
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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 // CDM_BASE_CDM_SESSION_H_
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