e56e58fbf5
[ Merge from Widevine CDM repo of https://widevine-internal-review.googlesource.com/#/c/10171/ and https://widevine-internal-review.googlesource.com/#/c/10172/ ] Updated license_protocol.proto from constituent protos in google3 These changes make use of OEMCrypto v9 changes to support usage reporting. Usage reporting may be enabled for streaming (by means of secure stops) and offline playback by a provider session token specified in the license. Changes include periodically updating usage information for relevant sessions and reporting and releasing usage information as needed. The CDM has removed all references to Secure Stops. This change updates the Android API implementation to comply. b/11987015 Change-Id: Ibb6f2ced4ef20ee349ca1ae6412ce686b2b5d085
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
// Copyright 2012 Google Inc. All Rights Reserved.
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#ifndef WVCDM_CORE_CRYPTO_SESSSION_H_
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#define WVCDM_CORE_CRYPTO_SESSSION_H_
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#include <string>
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#include <map>
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#include "lock.h"
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#include "oemcrypto_adapter.h"
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#include "OEMCryptoCENC.h"
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#include "wv_cdm_types.h"
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namespace wvcdm {
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class CryptoKey;
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typedef std::map<CryptoKeyId, CryptoKey*> CryptoKeyMap;
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class CryptoSession {
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public:
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CryptoSession();
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~CryptoSession();
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bool ValidateKeybox();
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bool GetToken(std::string* token);
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CdmSecurityLevel GetSecurityLevel();
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bool GetDeviceUniqueId(std::string* device_id);
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bool GetSystemId(uint32_t* system_id);
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bool GetProvisioningId(std::string* provisioning_id);
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CdmResponseType Open() { return Open(kLevelDefault); }
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CdmResponseType Open(SecurityLevel requested_security_level);
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void Close();
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bool IsOpen() { return open_; }
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CryptoSessionId oec_session_id() { return oec_session_id_; }
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// Key request/response
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void GenerateRequestId(std::string& req_id_str);
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bool PrepareRequest(const std::string& key_deriv_message,
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bool is_provisioning, std::string* signature);
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bool PrepareRenewalRequest(const std::string& message,
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std::string* signature);
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CdmResponseType LoadKeys(const std::string& message,
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const std::string& signature,
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const std::string& mac_key_iv,
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const std::string& mac_key,
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const std::vector<CryptoKey>& key_array,
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const std::string& provider_session_token);
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bool LoadCertificatePrivateKey(std::string& wrapped_key);
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bool RefreshKeys(const std::string& message, const std::string& signature,
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int num_keys, const CryptoKey* key_array);
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bool GenerateNonce(uint32_t* nonce);
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bool GenerateDerivedKeys(const std::string& message);
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bool GenerateDerivedKeys(const std::string& message,
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const std::string& session_key);
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bool RewrapDeviceRSAKey(const std::string& message,
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const std::string& signature,
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const std::string& nonce,
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const std::string& enc_rsa_key,
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const std::string& rsa_key_iv,
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std::string* wrapped_rsa_key);
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// Media data path
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CdmResponseType Decrypt(const CdmDecryptionParameters& parameters);
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CdmResponseType UpdateUsageInformation();
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CdmResponseType GenerateUsageReport(
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const std::string& provider_session_token,
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std::string* usage_report);
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CdmResponseType ReleaseUsageInformation(
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const std::string& message,
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const std::string& signature,
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const std::string& provider_session_token);
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bool GetRandom(size_t data_length, uint8_t* random_data);
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private:
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void Init();
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void Terminate();
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void GenerateMacContext(const std::string& input_context,
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std::string* deriv_context);
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void GenerateEncryptContext(const std::string& input_context,
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std::string* deriv_context);
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bool GenerateSignature(const std::string& message, bool use_rsa,
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std::string* signature);
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size_t GetOffset(std::string message, std::string field);
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bool SetDestinationBufferType();
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bool SelectKey(const std::string& key_id);
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static const size_t kSignatureSize = 32; // size for HMAC-SHA256 signature
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static Lock crypto_lock_;
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static bool initialized_;
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static int session_count_;
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bool open_;
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CryptoSessionId oec_session_id_;
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OEMCryptoBufferType destination_buffer_type_;
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bool is_destination_buffer_type_valid_;
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SecurityLevel requested_security_level_;
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KeyId key_id_;
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uint64_t request_id_base_;
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static uint64_t request_id_index_;
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CORE_DISALLOW_COPY_AND_ASSIGN(CryptoSession);
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};
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}; // namespace wvcdm
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#endif // WVCDM_CORE_CRYPTO_SESSSION_H_
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