f0cd22d4f4
[ Merge of http://go/wvgerrit/46907 ] The WV client supports root of trusts as keyboxes or OEM certificates. Devices with keyboxes use provisioning 2.0 protocol to provision while those with OEM certificates use 3.0. L3 provisioning failures occur if the L1 and L3 root of trusts differ. The provisioning method is now retrieved and cached when the security level is known, when the session is opened. Earlier it was retrieved and cached at initialization time and always set to the value of L1 OEMCrypto (if present). This led to provisioning failures. A case of acquiring a lock while one was held in GetProvisioningId() has also fixed. Bug: 77606913 Test: WV unit/integration tests Change-Id: I2d66ee2cf64f846cec4a37fbccb554447c8a0e1d
295 lines
13 KiB
C++
295 lines
13 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 <map>
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#include <string>
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#include <vector>
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#include "OEMCryptoCENC.h"
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#include "key_session.h"
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#include "lock.h"
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#include "metrics_collections.h"
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#include "oemcrypto_adapter.h"
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#include "scoped_ptr.h"
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#include "timer_metric.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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class UsageTableHeader;
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typedef std::map<std::string, CryptoKey*> CryptoKeyMap;
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// Crypto session utility functions used by KeySession implementations.
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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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size_t GetOffset(std::string message, std::string field);
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OEMCryptoCipherMode ToOEMCryptoCipherMode(CdmCipherMode cipher_mode);
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class CryptoSession {
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public:
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typedef OEMCrypto_HDCP_Capability HdcpCapability;
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typedef enum {
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kUsageDurationsInvalid = 0,
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kUsageDurationPlaybackNotBegun = 1,
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kUsageDurationsValid = 2,
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} UsageDurationStatus;
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struct SupportedCertificateTypes {
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bool rsa_2048_bit;
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bool rsa_3072_bit;
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bool rsa_cast;
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};
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// Creates an instance of CryptoSession with the given |crypto_metrics|.
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// |crypto_metrics| is owned by the caller, must NOT be null, and must
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// exist as long as the new CryptoSession exists.
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explicit CryptoSession(metrics::CryptoMetrics* crypto_metrics);
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virtual ~CryptoSession();
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virtual bool GetProvisioningToken(std::string* client_token);
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virtual CdmClientTokenType GetPreProvisionTokenType() {
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return pre_provision_token_type_;
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}
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virtual CdmSecurityLevel GetSecurityLevel();
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virtual bool GetInternalDeviceUniqueId(std::string* device_id);
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virtual bool GetExternalDeviceUniqueId(std::string* device_id);
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virtual bool GetApiVersion(uint32_t* version);
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virtual bool GetSystemId(uint32_t* system_id);
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virtual bool GetProvisioningId(std::string* provisioning_id);
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virtual uint8_t GetSecurityPatchLevel();
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virtual CdmResponseType Open() { return Open(kLevelDefault); }
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virtual CdmResponseType Open(SecurityLevel requested_security_level);
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virtual void Close();
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virtual bool IsOpen() { return open_; }
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virtual CryptoSessionId oec_session_id() { return oec_session_id_; }
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// Key request/response
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virtual bool GenerateRequestId(std::string* req_id_str);
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virtual bool PrepareRequest(const std::string& key_deriv_message,
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bool is_provisioning, std::string* signature);
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virtual bool PrepareRenewalRequest(const std::string& message,
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std::string* signature);
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virtual CdmResponseType LoadKeys(
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const std::string& message, const std::string& signature,
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const std::string& mac_key_iv, 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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const std::string& srm_requirement,
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CdmLicenseKeyType key_type);
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virtual CdmResponseType LoadEntitledContentKeys(
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const std::vector<CryptoKey>& key_array);
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virtual bool LoadCertificatePrivateKey(std::string& wrapped_key);
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virtual bool RefreshKeys(const std::string& message,
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const std::string& signature, int num_keys,
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const CryptoKey* key_array);
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virtual bool GenerateNonce(uint32_t* nonce);
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virtual bool GenerateDerivedKeys(const std::string& message);
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virtual bool GenerateDerivedKeys(const std::string& message,
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const std::string& session_key);
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virtual bool RewrapCertificate(const std::string& signed_message,
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const std::string& signature,
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const std::string& nonce,
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const std::string& private_key,
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const std::string& iv,
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const std::string& wrapping_key,
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std::string* wrapped_private_key);
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// Media data path
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virtual CdmResponseType Decrypt(const CdmDecryptionParameters& params);
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// Usage related methods
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virtual bool UsageInformationSupport(bool* has_support);
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virtual CdmResponseType UpdateUsageInformation(); // only for OEMCrypto v9-12
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virtual CdmResponseType DeactivateUsageInformation(
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const std::string& provider_session_token);
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virtual CdmResponseType GenerateUsageReport(
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const std::string& provider_session_token, std::string* usage_report,
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UsageDurationStatus* usage_duration_status,
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int64_t* seconds_since_started, int64_t* seconds_since_last_played);
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virtual CdmResponseType ReleaseUsageInformation(
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const std::string& message, const std::string& signature,
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const std::string& provider_session_token);
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// Delete a usage information for a single token. This does not require
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// a signed message from the server.
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virtual CdmResponseType DeleteUsageInformation(
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const std::string& provider_session_token);
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// Delete usage information for a list of tokens. This does not require
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// a signed message from the server.
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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 DeleteAllUsageReports();
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virtual bool IsAntiRollbackHwPresent();
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virtual bool GetHdcpCapabilities(HdcpCapability* current,
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HdcpCapability* max);
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virtual bool GetSupportedCertificateTypes(SupportedCertificateTypes* support);
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virtual bool GetRandom(size_t data_length, uint8_t* random_data);
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virtual bool GetNumberOfOpenSessions(size_t* count);
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virtual bool GetMaxNumberOfSessions(size_t* max);
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virtual bool GetSrmVersion(uint16_t* srm_version);
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virtual bool IsSrmUpdateSupported();
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virtual bool LoadSrm(const std::string& srm);
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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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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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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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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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// Usage table header and usage entry related methods
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virtual UsageTableHeader* GetUsageTableHeader() {
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return usage_table_header_;
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}
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virtual CdmResponseType GetUsageSupportType(CdmUsageSupportType* type);
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virtual CdmResponseType CreateUsageTableHeader(
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CdmUsageTableHeader* usage_table_header);
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virtual CdmResponseType LoadUsageTableHeader(
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const CdmUsageTableHeader& usage_table_header);
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virtual CdmResponseType CreateUsageEntry(uint32_t* entry_number);
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virtual CdmResponseType LoadUsageEntry(uint32_t entry_number,
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const CdmUsageEntry& usage_entry);
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virtual CdmResponseType UpdateUsageEntry(
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CdmUsageTableHeader* usage_table_header, CdmUsageEntry* usage_entry);
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virtual CdmResponseType ShrinkUsageTableHeader(
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uint32_t new_entry_count, CdmUsageTableHeader* usage_table_header);
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virtual CdmResponseType MoveUsageEntry(uint32_t new_entry_number);
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virtual bool CreateOldUsageEntry(uint64_t time_since_license_received,
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uint64_t time_since_first_decrypt,
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uint64_t time_since_last_decrypt,
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UsageDurationStatus status,
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const std::string& server_mac_key,
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const std::string& client_mac_key,
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const std::string& provider_session_token);
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virtual CdmResponseType CopyOldUsageEntry(
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const std::string& provider_session_token);
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virtual bool GetAnalogOutputCapabilities(bool* can_support_output,
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bool* can_disable_output,
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bool* can_support_cgms_a);
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virtual metrics::CryptoMetrics* GetCryptoMetrics() { return metrics_; }
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virtual CdmResponseType AddSubSession(const std::string& sub_session_key_id,
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const std::string& group_master_key_id);
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// TODO(jfore): exists is set based on whether a sub session exists. For now,
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// that is not assumed to be an error.
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virtual bool GenerateSubSessionNonce(const std::string& sub_session_key_id,
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bool* exists, uint32_t* nonce);
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private:
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friend class CryptoSessionForTest;
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CdmResponseType GetProvisioningMethod(SecurityLevel requested_security_level,
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CdmClientTokenType* token_type);
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void Init();
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void Terminate();
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bool GetTokenFromKeybox(std::string* token);
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bool GetTokenFromOemCert(std::string* token);
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static bool ExtractSystemIdFromOemCert(const std::string& oem_cert,
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uint32_t* system_id);
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bool GetSystemIdInternal(uint32_t* system_id);
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bool GenerateSignature(const std::string& message, std::string* signature);
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bool GenerateRsaSignature(const std::string& message, std::string* signature);
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bool SetDestinationBufferType();
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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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bool RewrapDeviceRSAKey30(const std::string& message,
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const std::string& nonce,
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const std::string& private_key,
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const std::string& iv,
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const std::string& wrapping_key,
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std::string* wrapped_private_key);
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CdmResponseType SelectKey(const std::string& key_id,
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CdmCipherMode cipher_mode);
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static const OEMCrypto_Algorithm kInvalidAlgorithm =
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static_cast<OEMCrypto_Algorithm>(-1);
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OEMCrypto_Algorithm GenericSigningAlgorithm(CdmSigningAlgorithm algorithm);
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OEMCrypto_Algorithm GenericEncryptionAlgorithm(
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CdmEncryptionAlgorithm algorithm);
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size_t GenericEncryptionBlockSize(CdmEncryptionAlgorithm algorithm);
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// These methods are used when a subsample exceeds the maximum buffer size
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// that the device can handle.
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OEMCryptoResult CopyBufferInChunks(
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const CdmDecryptionParameters& params,
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OEMCrypto_DestBufferDesc buffer_descriptor);
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OEMCryptoResult DecryptInChunks(
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const CdmDecryptionParameters& params,
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const OEMCrypto_DestBufferDesc& full_buffer_descriptor,
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const OEMCrypto_CENCEncryptPatternDesc& pattern_descriptor,
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size_t max_chunk_size);
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static void IncrementIV(uint64_t increase_by, std::vector<uint8_t>* iv_out);
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static const size_t kAes128BlockSize = 16; // Block size for AES_CBC_128
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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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metrics::CryptoMetrics* metrics_;
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metrics::TimerMetric life_span_;
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uint32_t system_id_;
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bool open_;
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CdmClientTokenType pre_provision_token_type_;
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std::string oem_token_; // Cached OEMCrypto Public Key
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bool update_usage_table_after_close_session_;
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CryptoSessionId oec_session_id_;
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SubLicenseSessionMap sub_license_oec_sessions_;
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// Used for sub license sessions.
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std::string wrapped_key_;
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scoped_ptr<KeySession> key_session_;
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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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bool is_usage_support_type_valid_;
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CdmUsageSupportType usage_support_type_;
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UsageTableHeader* usage_table_header_;
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static UsageTableHeader* usage_table_header_l1_;
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static UsageTableHeader* usage_table_header_l3_;
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uint64_t request_id_base_;
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static uint64_t request_id_index_;
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CdmCipherMode cipher_mode_;
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uint32_t api_version_;
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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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