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39f2fa2ab0867faf4c3b620e7112999434e35c29
android/libwvdrmengine/cdm/core/src/cdm_engine.cpp
Rahul Frias 4e047b8b0c Make CdmProvisioningResponse const and DeviceFiles level support 
* Make CdmProvisioningResponse const.

  [ Merge of http://go/wvgerrit/14618 ]

  The lack of const on this reference seems to be a mistake, since the
  responses is never modified.  This also allows the new CE CDM to pass
  responses directly through from the caller.

* Let Properties determine DeviceFiles level support

  [ Merge of http://go/wvgerrit/14620 ]

  Non-Android platforms do not have multiple security levels, and so do
  not use the security level to construct a base path.

  Instead of requiring a known "security level" to construct a file,
  accept anything that platform Properties will accept as a base path.

* Drop Properties::GetSecurityLevel().

  [ Merge of http://go/wvgerrit/14617 ]

  This seems to be dead code.

Change-Id: I94a970279213100730d6e6c763558dbe386f936a
2015-09-25 19:05:02 -07:00

1069 lines
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// Copyright 2013 Google Inc. All Rights Reserved.
#include "cdm_engine.h"
#include <stdlib.h>
#include <iostream>
#include <sstream>
#include "cdm_session.h"
#include "clock.h"
#include "device_files.h"
#include "license_protocol.pb.h"
#include "log.h"
#include "properties.h"
#include "scoped_ptr.h"
#include "string_conversions.h"
#include "wv_cdm_constants.h"
#include "wv_cdm_event_listener.h"
namespace {
const uint32_t kUpdateUsageInformationPeriod = 60; // seconds
const size_t kUsageReportsPerRequest = 1;
} // namespace
namespace wvcdm {
class UsagePropertySet : public CdmClientPropertySet {
public:
UsagePropertySet() {}
virtual ~UsagePropertySet() {}
void set_security_level(SecurityLevel security_level) {
if (kLevel3 == security_level)
security_level_ = QUERY_VALUE_SECURITY_LEVEL_L3;
else
security_level_.clear();
}
virtual const std::string& security_level() const { return security_level_; }
virtual bool use_privacy_mode() const { return false; }
virtual const std::string& service_certificate() const { return empty_; }
virtual bool is_session_sharing_enabled() const { return false; }
virtual uint32_t session_sharing_id() const { return 0; }
virtual void set_session_sharing_id(uint32_t /* id */) {}
virtual const std::string& app_id() const { return app_id_; }
void set_app_id(const std::string& appId) { app_id_ = appId; }
private:
std::string app_id_;
std::string security_level_;
const std::string empty_;
};
bool CdmEngine::seeded_ = false;
CdmEngine::CdmEngine()
: cert_provisioning_(NULL),
cert_provisioning_requested_security_level_(kLevelDefault),
usage_session_(NULL),
last_usage_information_update_time_(0) {
Properties::Init();
if (!seeded_) {
Clock clock;
srand(clock.GetCurrentTime());
seeded_ = true;
}
}
CdmEngine::~CdmEngine() {
AutoLock lock(session_list_lock_);
CdmSessionMap::iterator i(sessions_.begin());
for (; i != sessions_.end(); ++i) {
delete i->second;
}
sessions_.clear();
}
CdmResponseType CdmEngine::OpenSession(const CdmKeySystem& key_system,
const CdmClientPropertySet* property_set,
const std::string& origin,
WvCdmEventListener* event_listener,
CdmSessionId* session_id) {
LOGI("CdmEngine::OpenSession");
if (!ValidateKeySystem(key_system)) {
LOGI("CdmEngine::OpenSession: invalid key_system = %s", key_system.c_str());
return INVALID_KEY_SYSTEM;
}
if (!session_id) {
LOGE("CdmEngine::OpenSession: no session ID destination provided");
return INVALID_PARAMETERS_ENG_1;
}
CdmSessionId* forced_session_id = NULL;
if (Properties::AlwaysUseKeySetIds() && !session_id->empty()) {
forced_session_id = session_id;
}
scoped_ptr<CdmSession> new_session(
new CdmSession(property_set, origin, event_listener, forced_session_id));
if (new_session->session_id().empty()) {
LOGE("CdmEngine::OpenSession: failure to generate session ID");
return EMPTY_SESSION_ID;
}
CdmResponseType sts = new_session->Init();
if (sts != NO_ERROR) {
if (sts == NEED_PROVISIONING) {
cert_provisioning_requested_security_level_ =
new_session->GetRequestedSecurityLevel();
} else {
LOGE("CdmEngine::OpenSession: bad session init: %d", sts);
}
return sts;
}
*session_id = new_session->session_id();
AutoLock lock(session_list_lock_);
sessions_[*session_id] = new_session.release();
return NO_ERROR;
}
CdmResponseType CdmEngine::OpenKeySetSession(
const CdmKeySetId& key_set_id, const CdmClientPropertySet* property_set,
const std::string& origin, WvCdmEventListener* event_listener) {
LOGI("CdmEngine::OpenKeySetSession");
if (key_set_id.empty()) {
LOGE("CdmEngine::OpenKeySetSession: invalid key set id");
return EMPTY_KEYSET_ID_ENG_1;
}
CdmSessionId session_id;
CdmResponseType sts =
OpenSession(KEY_SYSTEM, property_set, origin, event_listener,
&session_id);
if (sts != NO_ERROR) return sts;
release_key_sets_[key_set_id] = session_id;
return NO_ERROR;
}
CdmResponseType CdmEngine::CloseSession(const CdmSessionId& session_id) {
LOGI("CdmEngine::CloseSession");
AutoLock lock(session_list_lock_);
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::CloseSession: session not found = %s", session_id.c_str());
return SESSION_NOT_FOUND_1;
}
CdmSession* session = iter->second;
sessions_.erase(session_id);
delete session;
return NO_ERROR;
}
CdmResponseType CdmEngine::CloseKeySetSession(const CdmKeySetId& key_set_id) {
LOGI("CdmEngine::CloseKeySetSession");
CdmReleaseKeySetMap::iterator iter = release_key_sets_.find(key_set_id);
if (iter == release_key_sets_.end()) {
LOGE("CdmEngine::CloseKeySetSession: key set id not found = %s",
key_set_id.c_str());
return KEYSET_ID_NOT_FOUND_1;
}
CdmResponseType sts = CloseSession(iter->second);
release_key_sets_.erase(iter);
return sts;
}
bool CdmEngine::IsOpenSession(const CdmSessionId& session_id) {
CdmSessionMap::iterator iter = sessions_.find(session_id);
return iter != sessions_.end();
}
CdmResponseType CdmEngine::GenerateKeyRequest(
const CdmSessionId& session_id, const CdmKeySetId& key_set_id,
const InitializationData& init_data, const CdmLicenseType license_type,
CdmAppParameterMap& app_parameters, CdmKeyMessage* key_request,
CdmKeyRequestType* key_request_type, std::string* server_url,
CdmKeySetId* key_set_id_out) {
LOGI("CdmEngine::GenerateKeyRequest");
CdmSessionId id = session_id;
CdmResponseType sts;
// NOTE: If AlwaysUseKeySetIds() is true, there is no need to consult the
// release_key_sets_ map for release licenses.
if (license_type == kLicenseTypeRelease &&
!Properties::AlwaysUseKeySetIds()) {
if (key_set_id.empty()) {
LOGE("CdmEngine::GenerateKeyRequest: invalid key set ID");
return EMPTY_KEYSET_ID_ENG_2;
}
if (!session_id.empty()) {
LOGE("CdmEngine::GenerateKeyRequest: invalid session ID = %s",
session_id.c_str());
return INVALID_SESSION_ID;
}
CdmReleaseKeySetMap::iterator iter = release_key_sets_.find(key_set_id);
if (iter == release_key_sets_.end()) {
LOGE("CdmEngine::GenerateKeyRequest: key set ID not found = %s",
key_set_id.c_str());
return KEYSET_ID_NOT_FOUND_2;
}
id = iter->second;
}
CdmSessionMap::iterator iter = sessions_.find(id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::GenerateKeyRequest: session_id not found = %s",
id.c_str());
return SESSION_NOT_FOUND_2;
}
if (!key_request) {
LOGE("CdmEngine::GenerateKeyRequest: no key request destination provided");
return INVALID_PARAMETERS_ENG_2;
}
key_request->clear();
if (license_type == kLicenseTypeRelease) {
sts = iter->second->RestoreOfflineSession(key_set_id, kLicenseTypeRelease);
if (sts != KEY_ADDED) {
LOGE("CdmEngine::GenerateKeyRequest: key release restoration failed,"
"sts = %d", static_cast<int>(sts));
return sts;
}
}
sts = iter->second->GenerateKeyRequest(
init_data, license_type, app_parameters, key_request, key_request_type,
server_url, key_set_id_out);
if (KEY_MESSAGE != sts) {
if (sts == NEED_PROVISIONING) {
cert_provisioning_requested_security_level_ =
iter->second->GetRequestedSecurityLevel();
}
LOGE("CdmEngine::GenerateKeyRequest: key request generation failed, "
"sts = %d", static_cast<int>(sts));
return sts;
}
if (license_type == kLicenseTypeRelease) {
OnKeyReleaseEvent(key_set_id);
}
return KEY_MESSAGE;
}
CdmResponseType CdmEngine::AddKey(const CdmSessionId& session_id,
const CdmKeyResponse& key_data,
CdmKeySetId* key_set_id) {
LOGI("CdmEngine::AddKey");
CdmSessionId id = session_id;
bool license_type_release = session_id.empty();
if (license_type_release) {
if (!key_set_id) {
LOGE("CdmEngine::AddKey: no key set id provided");
return INVALID_PARAMETERS_ENG_3;
}
if (key_set_id->empty()) {
LOGE("CdmEngine::AddKey: invalid key set id");
return EMPTY_KEYSET_ID_ENG_3;
}
CdmReleaseKeySetMap::iterator iter = release_key_sets_.find(*key_set_id);
if (iter == release_key_sets_.end()) {
LOGE("CdmEngine::AddKey: key set id not found = %s", key_set_id->c_str());
return KEYSET_ID_NOT_FOUND_3;
}
id = iter->second;
}
CdmSessionMap::iterator iter = sessions_.find(id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::AddKey: session id not found = %s", id.c_str());
return SESSION_NOT_FOUND_3;
}
if (key_data.empty()) {
LOGE("CdmEngine::AddKey: no key_data");
return EMPTY_KEY_DATA_1;
}
CdmResponseType sts = iter->second->AddKey(key_data, key_set_id);
if (KEY_ADDED != sts) {
LOGE("CdmEngine::AddKey: keys not added, result = %d", sts);
return sts;
}
return KEY_ADDED;
}
CdmResponseType CdmEngine::RestoreKey(const CdmSessionId& session_id,
const CdmKeySetId& key_set_id) {
LOGI("CdmEngine::RestoreKey");
if (key_set_id.empty()) {
LOGI("CdmEngine::RestoreKey: invalid key set id");
return EMPTY_KEYSET_ID_ENG_4;
}
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::RestoreKey: session_id not found = %s ",
session_id.c_str());
return SESSION_NOT_FOUND_4;
}
CdmResponseType sts =
iter->second->RestoreOfflineSession(key_set_id, kLicenseTypeOffline);
if (sts == NEED_PROVISIONING) {
cert_provisioning_requested_security_level_ =
iter->second->GetRequestedSecurityLevel();
}
if (sts != KEY_ADDED) {
LOGE("CdmEngine::RestoreKey: restore offline session failed = %d", sts);
}
return sts; // TODO ewew
}
CdmResponseType CdmEngine::RemoveKeys(const CdmSessionId& session_id) {
LOGI("CdmEngine::RemoveKeys");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::RemoveKeys: session_id not found = %s",
session_id.c_str());
return SESSION_NOT_FOUND_5;
}
iter->second->ReleaseCrypto();
return NO_ERROR;
}
CdmResponseType CdmEngine::GenerateRenewalRequest(
const CdmSessionId& session_id, CdmKeyMessage* key_request,
std::string* server_url) {
LOGI("CdmEngine::GenerateRenewalRequest");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::GenerateRenewalRequest: session_id not found = %s",
session_id.c_str());
return SESSION_NOT_FOUND_6;
}
if (!key_request) {
LOGE("CdmEngine::GenerateRenewalRequest: no key request destination");
return INVALID_PARAMETERS_ENG_4;
}
key_request->clear();
CdmResponseType sts =
iter->second->GenerateRenewalRequest(key_request, server_url);
if (KEY_MESSAGE != sts) {
LOGE("CdmEngine::GenerateRenewalRequest: key request gen. failed, sts=%d",
sts);
return sts;
}
return KEY_MESSAGE;
}
CdmResponseType CdmEngine::RenewKey(const CdmSessionId& session_id,
const CdmKeyResponse& key_data) {
LOGI("CdmEngine::RenewKey");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::RenewKey: session_id not found = %s", session_id.c_str());
return SESSION_NOT_FOUND_7;
}
if (key_data.empty()) {
LOGE("CdmEngine::RenewKey: no key_data");
return EMPTY_KEY_DATA_2;
}
CdmResponseType sts = iter->second->RenewKey(key_data);
if (KEY_ADDED != sts) {
LOGE("CdmEngine::RenewKey: keys not added, sts=%d", static_cast<int>(sts));
return sts;
}
return KEY_ADDED;
}
CdmResponseType CdmEngine::QueryStatus(SecurityLevel security_level,
CdmQueryMap* key_info) {
LOGI("CdmEngine::QueryStatus");
CryptoSession crypto_session;
if (security_level == kLevel3) {
CdmResponseType status = crypto_session.Open(kLevel3);
if (NO_ERROR != status) return INVALID_QUERY_STATUS;
}
switch (crypto_session.GetSecurityLevel()) {
case kSecurityLevelL1:
(*key_info)[QUERY_KEY_SECURITY_LEVEL] = QUERY_VALUE_SECURITY_LEVEL_L1;
break;
case kSecurityLevelL2:
(*key_info)[QUERY_KEY_SECURITY_LEVEL] = QUERY_VALUE_SECURITY_LEVEL_L2;
break;
case kSecurityLevelL3:
(*key_info)[QUERY_KEY_SECURITY_LEVEL] = QUERY_VALUE_SECURITY_LEVEL_L3;
break;
case kSecurityLevelUninitialized:
case kSecurityLevelUnknown:
(*key_info)[QUERY_KEY_SECURITY_LEVEL] =
QUERY_VALUE_SECURITY_LEVEL_UNKNOWN;
break;
default:
return INVALID_QUERY_KEY;
}
std::string deviceId;
bool success = crypto_session.GetDeviceUniqueId(&deviceId);
if (success) {
(*key_info)[QUERY_KEY_DEVICE_ID] = deviceId;
}
uint32_t system_id;
success = crypto_session.GetSystemId(&system_id);
if (success) {
std::ostringstream system_id_stream;
system_id_stream << system_id;
(*key_info)[QUERY_KEY_SYSTEM_ID] = system_id_stream.str();
}
std::string provisioning_id;
success = crypto_session.GetProvisioningId(&provisioning_id);
if (success) {
(*key_info)[QUERY_KEY_PROVISIONING_ID] = provisioning_id;
}
CryptoSession::HdcpCapability current_hdcp;
CryptoSession::HdcpCapability max_hdcp;
success = crypto_session.GetHdcpCapabilities(&current_hdcp, &max_hdcp);
if (success) {
(*key_info)[QUERY_KEY_CURRENT_HDCP_LEVEL] = MapHdcpVersion(current_hdcp);
(*key_info)[QUERY_KEY_MAX_HDCP_LEVEL] = MapHdcpVersion(max_hdcp);
}
bool supports_usage_reporting;
success = crypto_session.UsageInformationSupport(&supports_usage_reporting);
if (success) {
(*key_info)[QUERY_KEY_USAGE_SUPPORT] =
supports_usage_reporting ? QUERY_VALUE_TRUE : QUERY_VALUE_FALSE;
}
size_t number_of_open_sessions;
success = crypto_session.GetNumberOfOpenSessions(&number_of_open_sessions);
if (success) {
std::ostringstream open_sessions_stream;
open_sessions_stream << number_of_open_sessions;
(*key_info)[QUERY_KEY_NUMBER_OF_OPEN_SESSIONS] =
open_sessions_stream.str();
}
size_t maximum_number_of_sessions;
success = crypto_session.GetMaxNumberOfSessions(&maximum_number_of_sessions);
if (success) {
std::ostringstream max_sessions_stream;
max_sessions_stream << maximum_number_of_sessions;
(*key_info)[QUERY_KEY_MAX_NUMBER_OF_SESSIONS] =
max_sessions_stream.str();
}
uint32_t api_version;
success = crypto_session.GetApiVersion(&api_version);
if (success) {
std::ostringstream api_version_stream;
api_version_stream << api_version;
(*key_info)[QUERY_KEY_OEMCRYPTO_API_VERSION] = api_version_stream.str();
}
return NO_ERROR;
}
CdmResponseType CdmEngine::QuerySessionStatus(const CdmSessionId& session_id,
CdmQueryMap* key_info) {
LOGI("CdmEngine::QuerySessionStatus");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::QuerySessionStatus: session_id not found = %s",
session_id.c_str());
return SESSION_NOT_FOUND_8;
}
return iter->second->QueryStatus(key_info);
}
bool CdmEngine::IsReleaseSession(const CdmSessionId& session_id) {
LOGI("CdmEngine::IsReleaseSession");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::IsReleaseSession: session_id not found = %s",
session_id.c_str());
return false;
}
return iter->second->is_release();
}
bool CdmEngine::IsOfflineSession(const CdmSessionId& session_id) {
LOGI("CdmEngine::IsOfflineSession");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::IsOfflineSession: session_id not found = %s",
session_id.c_str());
return false;
}
return iter->second->is_offline();
}
CdmResponseType CdmEngine::QueryKeyStatus(const CdmSessionId& session_id,
CdmQueryMap* key_info) {
LOGI("CdmEngine::QueryKeyStatus");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::QueryKeyStatus: session_id not found = %s",
session_id.c_str());
return SESSION_NOT_FOUND_9;
}
return iter->second->QueryKeyStatus(key_info);
}
CdmResponseType CdmEngine::QueryKeyControlInfo(const CdmSessionId& session_id,
CdmQueryMap* key_info) {
LOGI("CdmEngine::QueryKeyControlInfo");
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter == sessions_.end()) {
LOGE("CdmEngine::QueryKeyControlInfo: session_id not found = %s",
session_id.c_str());
return SESSION_NOT_FOUND_10;
}
return iter->second->QueryKeyControlInfo(key_info);
}
/*
* Composes a device provisioning request and output the request in JSON format
* in *request. It also returns the default url for the provisioning server
* in *default_url.
*
* Returns NO_ERROR for success and CdmResponseType error code if fails.
*/
CdmResponseType CdmEngine::GetProvisioningRequest(
CdmCertificateType cert_type, const std::string& cert_authority,
const std::string& origin, CdmProvisioningRequest* request,
std::string* default_url) {
if (!request) {
LOGE("CdmEngine::GetProvisioningRequest: invalid output parameters");
return INVALID_PROVISIONING_REQUEST_PARAM_1;
}
if (!default_url) {
LOGE("CdmEngine::GetProvisioningRequest: invalid output parameters");
return INVALID_PROVISIONING_REQUEST_PARAM_2;
}
if (NULL == cert_provisioning_.get()) {
cert_provisioning_.reset(new CertificateProvisioning());
}
CdmResponseType ret = cert_provisioning_->GetProvisioningRequest(
cert_provisioning_requested_security_level_, cert_type, cert_authority,
origin, request, default_url);
if (ret != NO_ERROR) {
cert_provisioning_.reset(NULL); // Release resources.
}
return ret;
}
/*
* The response message consists of a device certificate and the device RSA key.
* The device RSA key is stored in the T.E.E. The device certificate is stored
* in the device.
*
* Returns NO_ERROR for success and CdmResponseType error code if fails.
*/
CdmResponseType CdmEngine::HandleProvisioningResponse(
const std::string& origin, const CdmProvisioningResponse& response,
std::string* cert, std::string* wrapped_key) {
if (response.empty()) {
LOGE("CdmEngine::HandleProvisioningResponse: Empty provisioning response.");
cert_provisioning_.reset(NULL);
return EMPTY_PROVISIONING_RESPONSE;
}
if (NULL == cert) {
LOGE(
"CdmEngine::HandleProvisioningResponse: invalid certificate "
"destination");
cert_provisioning_.reset(NULL);
return INVALID_PROVISIONING_PARAMETERS_1;
}
if (NULL == wrapped_key) {
LOGE("CdmEngine::HandleProvisioningResponse: invalid wrapped key "
"destination");
cert_provisioning_.reset(NULL);
return INVALID_PROVISIONING_PARAMETERS_2;
}
if (NULL == cert_provisioning_.get()) {
// Certificate provisioning object has been released. Check if a concurrent
// provisioning attempt has succeeded before declaring failure.
CryptoSession crypto_session;
CdmResponseType status =
crypto_session.Open(cert_provisioning_requested_security_level_);
if (NO_ERROR != status) {
LOGE(
"CdmEngine::HandleProvisioningResponse: provisioning object "
"missing and crypto session open failed.");
return EMPTY_PROVISIONING_CERTIFICATE_2;
}
CdmSecurityLevel security_level = crypto_session.GetSecurityLevel();
if (!IsProvisioned(security_level, origin)) {
LOGE(
"CdmEngine::HandleProvisioningResponse: provisioning object "
"missing.");
return EMPTY_PROVISIONING_CERTIFICATE_1;
}
return NO_ERROR;
}
CdmResponseType ret = cert_provisioning_->HandleProvisioningResponse(
origin, response, cert, wrapped_key);
// Release resources only on success. It is possible that a provisioning
// attempt was made after this one was requested but before the response was
// received, which will cause this attempt to fail. Not releasing will
// allow for the possibility that the later attempt succeeds.
if (NO_ERROR == ret) cert_provisioning_.reset(NULL);
return ret;
}
bool CdmEngine::IsProvisioned(CdmSecurityLevel security_level,
const std::string& origin) {
DeviceFiles handle;
if (!handle.Init(security_level)) {
LOGE("CdmEngine::IsProvisioned: unable to initialize device files");
return false;
}
return handle.HasCertificate(origin);
}
CdmResponseType CdmEngine::Unprovision(CdmSecurityLevel security_level,
const std::string& origin) {
DeviceFiles handle;
if (!handle.Init(security_level)) {
LOGE("CdmEngine::Unprovision: unable to initialize device files");
return UNPROVISION_ERROR_1;
}
if (origin != EMPTY_ORIGIN) {
if (!handle.RemoveCertificate(origin)) {
LOGE("CdmEngine::Unprovision: unable to delete certificate for origin %s",
origin.c_str());
return UNPROVISION_ERROR_2;
}
return NO_ERROR;
} else {
if (!handle.DeleteAllFiles()) {
LOGE("CdmEngine::Unprovision: unable to delete files");
return UNPROVISION_ERROR_3;
}
scoped_ptr<CryptoSession> crypto_session(new CryptoSession());
CdmResponseType status = crypto_session->Open(
security_level == kSecurityLevelL3 ? kLevel3 : kLevelDefault);
if (NO_ERROR != status) {
LOGE("CdmEngine::Unprovision: error opening crypto session: %d", status);
return UNPROVISION_ERROR_4;
}
status = crypto_session->DeleteAllUsageReports();
if (status != NO_ERROR) {
LOGE("CdmEngine::Unprovision: error deleteing usage reports: %d", status);
}
return status;
}
}
CdmResponseType CdmEngine::GetUsageInfo(const std::string& app_id,
const CdmSecureStopId& ssid,
CdmUsageInfo* usage_info) {
if (NULL == usage_property_set_.get()) {
usage_property_set_.reset(new UsagePropertySet());
}
usage_property_set_->set_security_level(kLevelDefault);
usage_property_set_->set_app_id(app_id);
usage_session_.reset(
new CdmSession(usage_property_set_.get(), EMPTY_ORIGIN, NULL, NULL));
CdmResponseType status = usage_session_->Init();
if (NO_ERROR != status) {
LOGE("CdmEngine::GetUsageInfo: session init error");
return status;
}
DeviceFiles handle;
if (!handle.Init(usage_session_->GetSecurityLevel())) {
LOGE("CdmEngine::GetUsageInfo: device file init error");
return GET_USAGE_INFO_ERROR_1;
}
CdmKeyMessage license_request;
CdmKeyResponse license_response;
if (!handle.RetrieveUsageInfo(app_id, ssid, &license_request,
&license_response)) {
usage_property_set_->set_security_level(kLevel3);
usage_property_set_->set_app_id(app_id);
usage_session_.reset(
new CdmSession(usage_property_set_.get(), EMPTY_ORIGIN, NULL, NULL));
status = usage_session_->Init();
if (NO_ERROR != status) {
LOGE("CdmEngine::GetUsageInfo: session init error");
return status;
}
if (!handle.Reset(usage_session_->GetSecurityLevel())) {
LOGE("CdmEngine::GetUsageInfo: device file init error");
return GET_USAGE_INFO_ERROR_2;
}
if (!handle.RetrieveUsageInfo(app_id, ssid, &license_request,
&license_response)) {
// No entry found for that ssid.
return USAGE_INFO_NOT_FOUND;
}
}
std::string server_url;
usage_info->resize(1);
status =
usage_session_->RestoreUsageSession(license_request, license_response);
if (KEY_ADDED != status) {
LOGE("CdmEngine::GetUsageInfo: restore usage session error %d", status);
usage_info->clear();
return status;
}
status =
usage_session_->GenerateReleaseRequest(&(*usage_info)[0], &server_url);
if (KEY_MESSAGE != status) {
LOGE("CdmEngine::GetUsageInfo: generate release request error: %d", status);
usage_info->clear();
return status;
}
return KEY_MESSAGE;
}
CdmResponseType CdmEngine::GetUsageInfo(const std::string& app_id,
CdmUsageInfo* usage_info) {
// Return a random usage report from a random security level
SecurityLevel security_level = ((rand() % 2) == 0) ? kLevelDefault : kLevel3;
CdmResponseType status = UNKNOWN_ERROR;
do {
status = GetUsageInfo(app_id, security_level, usage_info);
if (KEY_MESSAGE == status && !usage_info->empty()) return status;
} while (KEY_CANCELED == status);
security_level = (kLevel3 == security_level) ? kLevelDefault : kLevel3;
do {
status = GetUsageInfo(app_id, security_level, usage_info);
if (NEED_PROVISIONING == status)
return NO_ERROR; // Valid scenario that one of the security
// levels has not been provisioned
} while (KEY_CANCELED == status);
return status;
}
CdmResponseType CdmEngine::GetUsageInfo(const std::string& app_id,
SecurityLevel requested_security_level,
CdmUsageInfo* usage_info) {
if (NULL == usage_property_set_.get()) {
usage_property_set_.reset(new UsagePropertySet());
}
usage_property_set_->set_security_level(requested_security_level);
usage_property_set_->set_app_id(app_id);
usage_session_.reset(
new CdmSession(usage_property_set_.get(), EMPTY_ORIGIN, NULL, NULL));
CdmResponseType status = usage_session_->Init();
if (NO_ERROR != status) {
LOGE("CdmEngine::GetUsageInfo: session init error");
return status;
}
DeviceFiles handle;
if (!handle.Init(usage_session_->GetSecurityLevel())) {
LOGE("CdmEngine::GetUsageInfo: unable to initialize device files");
return GET_USAGE_INFO_ERROR_3;
}
std::vector<std::pair<CdmKeyMessage, CdmKeyResponse> > license_info;
if (!handle.RetrieveUsageInfo(app_id, &license_info)) {
LOGE("CdmEngine::GetUsageInfo: unable to read usage information");
return GET_USAGE_INFO_ERROR_4;
}
if (0 == license_info.size()) {
usage_info->resize(0);
return NO_ERROR;
}
std::string server_url;
usage_info->resize(kUsageReportsPerRequest);
uint32_t index = rand() % license_info.size();
status = usage_session_->RestoreUsageSession(license_info[index].first,
license_info[index].second);
if (KEY_ADDED != status) {
LOGE("CdmEngine::GetUsageInfo: restore usage session (%d) error %ld", index,
status);
usage_info->clear();
return status;
}
status =
usage_session_->GenerateReleaseRequest(&(*usage_info)[0], &server_url);
switch (status) {
case KEY_MESSAGE:
break;
case KEY_CANCELED: // usage information not present in
usage_session_->DeleteLicense(); // OEMCrypto, delete and try again
usage_info->clear();
break;
default:
LOGE("CdmEngine::GetUsageInfo: generate release request error: %d",
status);
usage_info->clear();
break;
}
return status;
}
CdmResponseType CdmEngine::ReleaseAllUsageInfo(const std::string& app_id) {
if (NULL == usage_property_set_.get()) {
usage_property_set_.reset(new UsagePropertySet());
}
usage_property_set_->set_app_id(app_id);
CdmResponseType status = NO_ERROR;
for (int j = kSecurityLevelL1; j < kSecurityLevelUnknown; ++j) {
DeviceFiles handle;
if (handle.Init(static_cast<CdmSecurityLevel>(j))) {
std::vector<std::string> provider_session_tokens;
if (!handle.DeleteAllUsageInfoForApp(app_id, &provider_session_tokens)) {
LOGE("CdmEngine::ReleaseAllUsageInfo: failed to delete L%d secure"
"stops", j);
status = RELEASE_ALL_USAGE_INFO_ERROR_1;
} else {
SecurityLevel security_level =
static_cast<CdmSecurityLevel>(j) == kSecurityLevelL3
? kLevel3
: kLevelDefault;
usage_property_set_->set_security_level(security_level);
usage_session_.reset(
new CdmSession(usage_property_set_.get(), EMPTY_ORIGIN, NULL,
NULL));
CdmResponseType status2 = usage_session_->
DeleteMultipleUsageInformation(provider_session_tokens);
if (status2 != NO_ERROR) {
status = status2;
}
}
} else {
LOGE("CdmEngine::ReleaseAllUsageInfo: failed to initialize L%d device"
"files", j);
status = RELEASE_ALL_USAGE_INFO_ERROR_2;
}
}
usage_session_.reset(NULL);
return status;
}
CdmResponseType CdmEngine::ReleaseUsageInfo(
const CdmUsageInfoReleaseMessage& message) {
if (NULL == usage_session_.get()) {
LOGE("CdmEngine::ReleaseUsageInfo: cdm session not initialized");
return RELEASE_USAGE_INFO_ERROR;
}
CdmResponseType status = usage_session_->ReleaseKey(message);
usage_session_.reset(NULL);
if (NO_ERROR != status) {
LOGE("CdmEngine::ReleaseUsageInfo: release key error: %d", status);
}
return status;
}
CdmResponseType CdmEngine::Decrypt(const CdmSessionId& session_id,
const CdmDecryptionParameters& parameters) {
if (parameters.key_id == NULL) {
LOGE("CdmEngine::Decrypt: no key_id");
return INVALID_DECRYPT_PARAMETERS_ENG_1;
}
if (parameters.encrypt_buffer == NULL) {
LOGE("CdmEngine::Decrypt: no src encrypt buffer");
return INVALID_DECRYPT_PARAMETERS_ENG_2;
}
if (parameters.iv == NULL) {
LOGE("CdmEngine::Decrypt: no iv");
return INVALID_DECRYPT_PARAMETERS_ENG_3;
}
if (parameters.decrypt_buffer == NULL) {
if (!parameters.is_secure &&
!Properties::Properties::oem_crypto_use_fifo()) {
LOGE("CdmEngine::Decrypt: no dest decrypt buffer");
return INVALID_DECRYPT_PARAMETERS_ENG_4;
}
// else we must be level 1 direct and we don't need to return a buffer.
}
CdmSessionMap::iterator iter;
if (session_id.empty()) {
// Loop through the sessions to find the session containing the key_id.
for (iter = sessions_.begin(); iter != sessions_.end(); ++iter) {
if (iter->second->IsKeyLoaded(*parameters.key_id)) {
break;
}
}
} else {
iter = sessions_.find(session_id);
}
if (iter == sessions_.end()) {
LOGE("CdmEngine::Decrypt: session not found: id=%s, id size=%d",
session_id.c_str(), session_id.size());
return SESSION_NOT_FOUND_FOR_DECRYPT;
}
return iter->second->Decrypt(parameters);
}
bool CdmEngine::IsKeyLoaded(const KeyId& key_id) {
for (CdmSessionMap::iterator iter = sessions_.begin();
iter != sessions_.end(); ++iter) {
if (iter->second->IsKeyLoaded(key_id)) {
return true;
}
}
return false;
}
bool CdmEngine::FindSessionForKey(const KeyId& key_id,
CdmSessionId* session_id) {
if (NULL == session_id) {
LOGE("CdmEngine::FindSessionForKey: session id not provided");
return false;
}
CdmSessionMap::iterator iter = sessions_.find(*session_id);
if (iter != sessions_.end()) {
if (iter->second->IsKeyLoaded(key_id)) {
return true;
}
}
uint32_t session_sharing_id = Properties::GetSessionSharingId(*session_id);
for (iter = sessions_.begin(); iter != sessions_.end(); ++iter) {
CdmSessionId local_session_id = iter->second->session_id();
if (Properties::GetSessionSharingId(local_session_id) ==
session_sharing_id) {
if (iter->second->IsKeyLoaded(key_id)) {
*session_id = local_session_id;
return true;
}
}
}
return false;
}
void CdmEngine::NotifyResolution(const CdmSessionId& session_id, uint32_t width,
uint32_t height) {
CdmSessionMap::iterator iter = sessions_.find(session_id);
if (iter != sessions_.end()) {
iter->second->NotifyResolution(width, height);
}
}
bool CdmEngine::ValidateKeySystem(const CdmKeySystem& key_system) {
return (key_system.find("widevine") != std::string::npos);
}
void CdmEngine::OnTimerEvent() {
Clock clock;
uint64_t current_time = clock.GetCurrentTime();
bool usage_update_period_expired = false;
if (current_time - last_usage_information_update_time_ >
kUpdateUsageInformationPeriod) {
usage_update_period_expired = true;
last_usage_information_update_time_ = current_time;
}
bool is_initial_usage_update = false;
bool is_usage_update_needed = false;
AutoLock lock(session_list_lock_);
for (CdmSessionMap::iterator iter = sessions_.begin();
iter != sessions_.end(); ++iter) {
is_initial_usage_update =
is_initial_usage_update || iter->second->is_initial_usage_update();
is_usage_update_needed =
is_usage_update_needed || iter->second->is_usage_update_needed();
iter->second->OnTimerEvent(usage_update_period_expired);
}
if (is_usage_update_needed &&
(usage_update_period_expired || is_initial_usage_update)) {
bool has_usage_been_updated = false;
for (CdmSessionMap::iterator iter = sessions_.begin();
iter != sessions_.end(); ++iter) {
iter->second->reset_usage_flags();
if (!has_usage_been_updated) {
// usage is updated for all sessions so this needs to be
// called only once per update usage information period
CdmResponseType status = iter->second->UpdateUsageInformation();
if (NO_ERROR != status) {
LOGW("Update usage information failed: %d", status);
} else {
has_usage_been_updated = true;
}
}
}
}
}
void CdmEngine::OnKeyReleaseEvent(const CdmKeySetId& key_set_id) {
AutoLock lock(session_list_lock_);
for (CdmSessionMap::iterator iter = sessions_.begin();
iter != sessions_.end(); ++iter) {
iter->second->OnKeyReleaseEvent(key_set_id);
}
}
std::string CdmEngine::MapHdcpVersion(
CryptoSession::HdcpCapability version) {
switch (version) {
case HDCP_NONE:
return QUERY_VALUE_UNPROTECTED;
case HDCP_V1:
return QUERY_VALUE_HDCP_V1;
case HDCP_V2:
return QUERY_VALUE_HDCP_V2_0;
case HDCP_V2_1:
return QUERY_VALUE_HDCP_V2_1;
case HDCP_V2_2:
return QUERY_VALUE_HDCP_V2_2;
case HDCP_NO_DIGITAL_OUTPUT:
return QUERY_VALUE_DISCONNECTED;
}
return "";
}
} // namespace wvcdm
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