chrome/browser/chromeos/settings/install_attributes.cc - chromium/src.git - Git at Google

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "chrome/browser/chromeos/settings/install_attributes.h"

 #include <stddef.h>

 #include <utility>

 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/policy/proto/install_attributes.pb.h"
 #include "chromeos/cryptohome/cryptohome_util.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "google_apis/gaia/gaia_auth_util.h"

 namespace chromeos {

 namespace cu = cryptohome_util;

 namespace {

 // Number of TPM lock state query retries during consistency check.
 int kDbusRetryCount = 12;

 // Interval of TPM lock state query retries during consistency check.
 int kDbusRetryIntervalInSeconds = 5;

 std::string ReadMapKey(const std::map<std::string, std::string>& map,
                        const std::string& key) {
   std::map<std::string, std::string>::const_iterator entry = map.find(key);
   if (entry != map.end()) {
     return entry->second;
   }
   return std::string();
 }

 void WarnIfNonempty(const std::map<std::string, std::string>& map,
                     const std::string& key) {
   if (!ReadMapKey(map, key).empty()) {
     LOG(WARNING) << key << " expected to be empty.";
   }
 }

 }  // namespace

 // static
 std::string
 InstallAttributes::GetEnterpriseOwnedInstallAttributesBlobForTesting(
     const std::string& user_name) {
   cryptohome::SerializedInstallAttributes install_attrs_proto;
   cryptohome::SerializedInstallAttributes::Attribute* attribute = nullptr;

   attribute = install_attrs_proto.add_attributes();
   attribute->set_name(InstallAttributes::kAttrEnterpriseOwned);
   attribute->set_value("true");

   attribute = install_attrs_proto.add_attributes();
   attribute->set_name(InstallAttributes::kAttrEnterpriseUser);
   attribute->set_value(user_name);

   return install_attrs_proto.SerializeAsString();
 }

 InstallAttributes::InstallAttributes(CryptohomeClient* cryptohome_client)
     : cryptohome_client_(cryptohome_client),
       weak_ptr_factory_(this) {
 }

 InstallAttributes::~InstallAttributes() {}

 void InstallAttributes::Init(const base::FilePath& cache_file) {
   DCHECK(!device_locked_);

   // Mark the consistency check as running to ensure that LockDevice() is
   // blocked, but wait for the cryptohome service to be available before
   // actually calling TriggerConsistencyCheck().
   consistency_check_running_ = true;
   cryptohome_client_->WaitForServiceToBeAvailable(
       base::Bind(&InstallAttributes::OnCryptohomeServiceInitiallyAvailable,
                  weak_ptr_factory_.GetWeakPtr()));

   if (!base::PathExists(cache_file))
     return;

   device_locked_ = true;

   char buf[16384];
   int len = base::ReadFile(cache_file, buf, sizeof(buf));
   if (len == -1 || len >= static_cast<int>(sizeof(buf))) {
     PLOG(ERROR) << "Failed to read " << cache_file.value();
     return;
   }

   cryptohome::SerializedInstallAttributes install_attrs_proto;
   if (!install_attrs_proto.ParseFromArray(buf, len)) {
     LOG(ERROR) << "Failed to parse install attributes cache.";
     return;
   }

   google::protobuf::RepeatedPtrField<
       const cryptohome::SerializedInstallAttributes::Attribute>::iterator entry;
   std::map<std::string, std::string> attr_map;
   for (entry = install_attrs_proto.attributes().begin();
        entry != install_attrs_proto.attributes().end();
        ++entry) {
     // The protobuf values contain terminating null characters, so we have to
     // sanitize the value here.
     attr_map.insert(std::make_pair(entry->name(),
                                    std::string(entry->value().c_str())));
   }

   DecodeInstallAttributes(attr_map);
 }

 void InstallAttributes::ReadImmutableAttributes(const base::Closure& callback) {
   if (device_locked_) {
     callback.Run();
     return;
   }

   cryptohome_client_->InstallAttributesIsReady(
       base::Bind(&InstallAttributes::ReadAttributesIfReady,
                  weak_ptr_factory_.GetWeakPtr(), callback));
 }

 void InstallAttributes::ReadAttributesIfReady(const base::Closure& callback,
                                               DBusMethodCallStatus call_status,
                                               bool result) {
   if (call_status == DBUS_METHOD_CALL_SUCCESS && result) {
     registration_mode_ = policy::DEVICE_MODE_NOT_SET;
     if (!cu::InstallAttributesIsInvalid() &&
         !cu::InstallAttributesIsFirstInstall()) {
       device_locked_ = true;

       static const char* const kEnterpriseAttributes[] = {
         kAttrEnterpriseDeviceId,
         kAttrEnterpriseDomain,
         kAttrEnterpriseRealm,
         kAttrEnterpriseMode,
         kAttrEnterpriseOwned,
         kAttrEnterpriseUser,
         kAttrConsumerKioskEnabled,
       };
       std::map<std::string, std::string> attr_map;
       for (size_t i = 0; i < arraysize(kEnterpriseAttributes); ++i) {
         std::string value;
         if (cu::InstallAttributesGet(kEnterpriseAttributes[i], &value))
           attr_map[kEnterpriseAttributes[i]] = value;
       }

       DecodeInstallAttributes(attr_map);
     }
   }
   callback.Run();
 }

 void InstallAttributes::LockDevice(policy::DeviceMode device_mode,
                                    const std::string& domain,
                                    const std::string& realm,
                                    const std::string& device_id,
                                    const LockResultCallback& callback) {
   CHECK((device_mode == policy::DEVICE_MODE_ENTERPRISE &&
          !domain.empty() && realm.empty() && !device_id.empty()) ||
         (device_mode == policy::DEVICE_MODE_ENTERPRISE_AD &&
          domain.empty() && !realm.empty() && !device_id.empty()) ||
         (device_mode == policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH &&
          domain.empty() && realm.empty() && device_id.empty()));
   DCHECK(!callback.is_null());
   CHECK_EQ(device_lock_running_, false);

   // Check for existing lock first.
   if (device_locked_) {
     if (device_mode != registration_mode_) {
       LOG(ERROR) << "Trying to re-lock with wrong mode.";
       callback.Run(LOCK_WRONG_MODE);
       return;
     }

     if (domain != registration_domain_ ||
         realm != registration_realm_ ||
         device_id != registration_device_id_) {
       LOG(ERROR) << "Trying to re-lock with non-matching parameters.";
       callback.Run(LOCK_WRONG_DOMAIN);
       return;
     }

     // Already locked in the right mode, signal success.
     callback.Run(LOCK_SUCCESS);
     return;
   }

   // In case the consistency check is still running, postpone the device locking
   // until it has finished.  This should not introduce additional delay since
   // device locking must wait for TPM initialization anyways.
   if (consistency_check_running_) {
     CHECK(post_check_action_.is_null());
     post_check_action_ = base::Bind(&InstallAttributes::LockDevice,
                                     weak_ptr_factory_.GetWeakPtr(),
                                     device_mode,
                                     domain,
                                     realm,
                                     device_id,
                                     callback);
     return;
   }

   device_lock_running_ = true;
   cryptohome_client_->InstallAttributesIsReady(
       base::Bind(&InstallAttributes::LockDeviceIfAttributesIsReady,
                  weak_ptr_factory_.GetWeakPtr(),
                  device_mode,
                  domain,
                  realm,
                  device_id,
                  callback));
 }

 void InstallAttributes::LockDeviceIfAttributesIsReady(
     policy::DeviceMode device_mode,
     const std::string& domain,
     const std::string& realm,
     const std::string& device_id,
     const LockResultCallback& callback,
     DBusMethodCallStatus call_status,
     bool result) {
   if (call_status != DBUS_METHOD_CALL_SUCCESS || !result) {
     device_lock_running_ = false;
     callback.Run(LOCK_NOT_READY);
     return;
   }

   // Clearing the TPM password seems to be always a good deal.
   if (cu::TpmIsEnabled() && !cu::TpmIsBeingOwned() && cu::TpmIsOwned()) {
     cryptohome_client_->CallTpmClearStoredPasswordAndBlock();
   }

   // Make sure we really have a working InstallAttrs.
   if (cu::InstallAttributesIsInvalid()) {
     LOG(ERROR) << "Install attributes invalid.";
     device_lock_running_ = false;
     callback.Run(LOCK_BACKEND_INVALID);
     return;
   }

   if (!cu::InstallAttributesIsFirstInstall()) {
     LOG(ERROR) << "Install attributes already installed.";
     device_lock_running_ = false;
     callback.Run(LOCK_ALREADY_LOCKED);
     return;
   }

   // Set values in the InstallAttrs.
   std::string kiosk_enabled, enterprise_owned;
   if (device_mode == policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH) {
     kiosk_enabled = "true";
   } else {
     enterprise_owned = "true";
   }
   std::string mode = GetDeviceModeString(device_mode);
   if (!cu::InstallAttributesSet(kAttrConsumerKioskEnabled, kiosk_enabled) ||
       !cu::InstallAttributesSet(kAttrEnterpriseOwned, enterprise_owned) ||
       !cu::InstallAttributesSet(kAttrEnterpriseMode, mode) ||
       !cu::InstallAttributesSet(kAttrEnterpriseDomain, domain) ||
       !cu::InstallAttributesSet(kAttrEnterpriseRealm, realm) ||
       !cu::InstallAttributesSet(kAttrEnterpriseDeviceId, device_id)) {
     LOG(ERROR) << "Failed writing attributes.";
     device_lock_running_ = false;
     callback.Run(LOCK_SET_ERROR);
     return;
   }

   if (!cu::InstallAttributesFinalize() ||
       cu::InstallAttributesIsFirstInstall()) {
     LOG(ERROR) << "Failed locking.";
     device_lock_running_ = false;
     callback.Run(LOCK_FINALIZE_ERROR);
     return;
   }

   ReadImmutableAttributes(
       base::Bind(&InstallAttributes::OnReadImmutableAttributes,
                  weak_ptr_factory_.GetWeakPtr(),
                  device_mode,
                  domain,
                  realm,
                  device_id,
                  callback));
 }

 void InstallAttributes::OnReadImmutableAttributes(
     policy::DeviceMode mode,
     const std::string& domain,
     const std::string& realm,
     const std::string& device_id,
     const LockResultCallback& callback) {
   device_lock_running_ = false;

   if (registration_mode_ != mode ||
       registration_domain_ != domain ||
       registration_realm_ != realm ||
       registration_device_id_ != device_id) {
     LOG(ERROR) << "Locked data doesn't match.";
     callback.Run(LOCK_READBACK_ERROR);
     return;
   }

   callback.Run(LOCK_SUCCESS);
 }

 bool InstallAttributes::IsEnterpriseManaged() const {
   if (!device_locked_) {
     return false;
   }
   return registration_mode_ == policy::DEVICE_MODE_ENTERPRISE ||
       registration_mode_ == policy::DEVICE_MODE_ENTERPRISE_AD;
 }

 bool InstallAttributes::IsActiveDirectoryManaged() const {
   if (!device_locked_) {
     return false;
   }
   return registration_mode_ == policy::DEVICE_MODE_ENTERPRISE_AD;
 }

 bool InstallAttributes::IsCloudManaged() const {
   if (!device_locked_) {
     return false;
   }
   return registration_mode_ == policy::DEVICE_MODE_ENTERPRISE;
 }

 bool InstallAttributes::IsConsumerKioskDeviceWithAutoLaunch() {
   return device_locked_ &&
          registration_mode_ == policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH;
 }

 void InstallAttributes::TriggerConsistencyCheck(int dbus_retries) {
   cryptohome_client_->TpmIsOwned(
       base::Bind(&InstallAttributes::OnTpmOwnerCheckCompleted,
                  weak_ptr_factory_.GetWeakPtr(),
                  dbus_retries));
 }

 void InstallAttributes::OnTpmOwnerCheckCompleted(
     int dbus_retries_remaining,
     DBusMethodCallStatus call_status,
     bool result) {
   if (call_status != DBUS_METHOD_CALL_SUCCESS && dbus_retries_remaining) {
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
         FROM_HERE,
         base::Bind(&InstallAttributes::TriggerConsistencyCheck,
                    weak_ptr_factory_.GetWeakPtr(), dbus_retries_remaining - 1),
         base::TimeDelta::FromSeconds(kDbusRetryIntervalInSeconds));
     return;
   }

   base::HistogramBase::Sample state = device_locked_;
   state |= 0x2 * (registration_mode_ == policy::DEVICE_MODE_ENTERPRISE);
   if (call_status == DBUS_METHOD_CALL_SUCCESS)
     state |= 0x4 * result;
   else
     state = 0x8;  // This case is not a bit mask.
   UMA_HISTOGRAM_ENUMERATION("Enterprise.AttributesTPMConsistency", state, 9);

   // Run any action (LockDevice call) that might have queued behind the
   // consistency check.
   consistency_check_running_ = false;
   if (!post_check_action_.is_null()) {
     post_check_action_.Run();
     post_check_action_.Reset();
   }
 }

 // Warning: The values for these keys (but not the keys themselves) are stored
 // in the protobuf with a trailing zero.  Also note that some of these constants
 // have been copied to login_manager/device_policy_service.cc.  Please make sure
 // that all changes to the constants are reflected there as well.
 const char InstallAttributes::kConsumerDeviceMode[] = "consumer";
 const char InstallAttributes::kEnterpriseDeviceMode[] = "enterprise";
 const char InstallAttributes::kEnterpriseADDeviceMode[] = "enterprise_ad";
 const char InstallAttributes::kLegacyRetailDeviceMode[] = "kiosk";
 const char InstallAttributes::kConsumerKioskDeviceMode[] = "consumer_kiosk";

 const char InstallAttributes::kAttrEnterpriseDeviceId[] =
     "enterprise.device_id";
 const char InstallAttributes::kAttrEnterpriseDomain[] = "enterprise.domain";
 const char InstallAttributes::kAttrEnterpriseRealm[] = "enterprise.realm";
 const char InstallAttributes::kAttrEnterpriseMode[] = "enterprise.mode";
 const char InstallAttributes::kAttrEnterpriseOwned[] = "enterprise.owned";
 const char InstallAttributes::kAttrEnterpriseUser[] = "enterprise.user";
 const char InstallAttributes::kAttrConsumerKioskEnabled[] =
     "consumer.app_kiosk_enabled";

 void InstallAttributes::OnCryptohomeServiceInitiallyAvailable(
     bool service_is_ready) {
   if (!service_is_ready)
     LOG(ERROR) << "Failed waiting for cryptohome D-Bus service availability.";

   // Start the consistency check even if we failed to wait for availability;
   // hopefully the service will become available eventually.
   TriggerConsistencyCheck(kDbusRetryCount);
 }

 std::string InstallAttributes::GetDeviceModeString(policy::DeviceMode mode) {
   switch (mode) {
     case policy::DEVICE_MODE_CONSUMER:
       return InstallAttributes::kConsumerDeviceMode;
     case policy::DEVICE_MODE_ENTERPRISE:
       return InstallAttributes::kEnterpriseDeviceMode;
     case policy::DEVICE_MODE_ENTERPRISE_AD:
       return InstallAttributes::kEnterpriseADDeviceMode;
     case policy::DEVICE_MODE_LEGACY_RETAIL_MODE:
       return InstallAttributes::kLegacyRetailDeviceMode;
     case policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH:
       return InstallAttributes::kConsumerKioskDeviceMode;
     case policy::DEVICE_MODE_PENDING:
     case policy::DEVICE_MODE_NOT_SET:
       break;
   }
   NOTREACHED() << "Invalid device mode: " << mode;
   return std::string();
 }

 policy::DeviceMode InstallAttributes::GetDeviceModeFromString(
     const std::string& mode) {
   if (mode == InstallAttributes::kConsumerDeviceMode)
     return policy::DEVICE_MODE_CONSUMER;
   else if (mode == InstallAttributes::kEnterpriseDeviceMode)
     return policy::DEVICE_MODE_ENTERPRISE;
   else if (mode == InstallAttributes::kEnterpriseADDeviceMode)
     return policy::DEVICE_MODE_ENTERPRISE_AD;
   else if (mode == InstallAttributes::kLegacyRetailDeviceMode)
     return policy::DEVICE_MODE_LEGACY_RETAIL_MODE;
   else if (mode == InstallAttributes::kConsumerKioskDeviceMode)
     return policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH;
   return policy::DEVICE_MODE_NOT_SET;
 }

 void InstallAttributes::DecodeInstallAttributes(
     const std::map<std::string, std::string>& attr_map) {
   // Start from a clean slate.
   registration_mode_ = policy::DEVICE_MODE_NOT_SET;
   registration_domain_.clear();
   registration_realm_.clear();
   registration_device_id_.clear();

   const std::string enterprise_owned =
       ReadMapKey(attr_map, kAttrEnterpriseOwned);
   const std::string consumer_kiosk_enabled =
       ReadMapKey(attr_map, kAttrConsumerKioskEnabled);
   const std::string mode = ReadMapKey(attr_map, kAttrEnterpriseMode);
   const std::string domain = ReadMapKey(attr_map, kAttrEnterpriseDomain);
   const std::string realm = ReadMapKey(attr_map, kAttrEnterpriseRealm);
   const std::string device_id = ReadMapKey(attr_map, kAttrEnterpriseDeviceId);
   const std::string user_deprecated = ReadMapKey(attr_map, kAttrEnterpriseUser);

   if (enterprise_owned == "true") {
     WarnIfNonempty(attr_map, kAttrConsumerKioskEnabled);
     registration_device_id_ = device_id;

     // Set registration_mode_.
     registration_mode_ = GetDeviceModeFromString(mode);
     if (registration_mode_ != policy::DEVICE_MODE_ENTERPRISE &&
         registration_mode_ != policy::DEVICE_MODE_ENTERPRISE_AD) {
       if (!mode.empty()) {
         LOG(WARNING) << "Bad " << kAttrEnterpriseMode << ": " << mode;
       }
       registration_mode_ = policy::DEVICE_MODE_ENTERPRISE;
     }

     if (registration_mode_ == policy::DEVICE_MODE_ENTERPRISE) {
       // Either set registration_domain_ ...
       WarnIfNonempty(attr_map, kAttrEnterpriseRealm);
       if (!domain.empty()) {
         // The canonicalization is for compatibility with earlier versions.
         registration_domain_ = gaia::CanonicalizeDomain(domain);
       } else if (!user_deprecated.empty()) {
         // Compatibility for pre M19 code.
         registration_domain_ = gaia::ExtractDomainName(user_deprecated);
       } else {
         LOG(WARNING) << "Couldn't read domain.";
       }
     } else {
       // ... or set registration_realm_.
       WarnIfNonempty(attr_map, kAttrEnterpriseDomain);
       if (!realm.empty()) {
         registration_realm_ = realm;
       } else {
         LOG(WARNING) << "Couldn't read realm.";
       }
     }

     return;
   }

   WarnIfNonempty(attr_map, kAttrEnterpriseOwned);
   WarnIfNonempty(attr_map, kAttrEnterpriseDomain);
   WarnIfNonempty(attr_map, kAttrEnterpriseRealm);
   WarnIfNonempty(attr_map, kAttrEnterpriseDeviceId);
   WarnIfNonempty(attr_map, kAttrEnterpriseUser);
   if (consumer_kiosk_enabled == "true") {
     registration_mode_ = policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH;
     return;
   }

   WarnIfNonempty(attr_map, kAttrConsumerKioskEnabled);
   if (user_deprecated.empty()) {
     registration_mode_ = policy::DEVICE_MODE_CONSUMER;
   }
 }

 }  // namespace chromeos
	// Copyright (c) 2012 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "chrome/browser/chromeos/settings/install_attributes.h"

	#include <stddef.h>

	#include <utility>

	#include "base/bind.h"
	#include "base/files/file_util.h"
	#include "base/location.h"
	#include "base/logging.h"
	#include "base/macros.h"
	#include "base/metrics/histogram_base.h"
	#include "base/metrics/histogram_macros.h"
	#include "base/single_thread_task_runner.h"
	#include "base/threading/thread_task_runner_handle.h"
	#include "base/time/time.h"
	#include "chrome/browser/chromeos/policy/proto/install_attributes.pb.h"
	#include "chromeos/cryptohome/cryptohome_util.h"
	#include "chromeos/dbus/dbus_thread_manager.h"
	#include "google_apis/gaia/gaia_auth_util.h"

	namespace chromeos {

	namespace cu = cryptohome_util;

	namespace {

	// Number of TPM lock state query retries during consistency check.
	int kDbusRetryCount = 12;

	// Interval of TPM lock state query retries during consistency check.
	int kDbusRetryIntervalInSeconds = 5;

	std::string ReadMapKey(const std::map<std::string, std::string>& map,
	const std::string& key) {
	std::map<std::string, std::string>::const_iterator entry = map.find(key);
	if (entry != map.end()) {
	return entry->second;
	}
	return std::string();
	}

	void WarnIfNonempty(const std::map<std::string, std::string>& map,
	const std::string& key) {
	if (!ReadMapKey(map, key).empty()) {
	LOG(WARNING) << key << " expected to be empty.";
	}
	}

	} // namespace

	// static
	std::string
	InstallAttributes::GetEnterpriseOwnedInstallAttributesBlobForTesting(
	const std::string& user_name) {
	cryptohome::SerializedInstallAttributes install_attrs_proto;
	cryptohome::SerializedInstallAttributes::Attribute* attribute = nullptr;

	attribute = install_attrs_proto.add_attributes();
	attribute->set_name(InstallAttributes::kAttrEnterpriseOwned);
	attribute->set_value("true");

	attribute = install_attrs_proto.add_attributes();
	attribute->set_name(InstallAttributes::kAttrEnterpriseUser);
	attribute->set_value(user_name);

	return install_attrs_proto.SerializeAsString();
	}

	InstallAttributes::InstallAttributes(CryptohomeClient* cryptohome_client)
	: cryptohome_client_(cryptohome_client),
	weak_ptr_factory_(this) {
	}

	InstallAttributes::~InstallAttributes() {}

	void InstallAttributes::Init(const base::FilePath& cache_file) {
	DCHECK(!device_locked_);

	// Mark the consistency check as running to ensure that LockDevice() is
	// blocked, but wait for the cryptohome service to be available before
	// actually calling TriggerConsistencyCheck().
	consistency_check_running_ = true;
	cryptohome_client_->WaitForServiceToBeAvailable(
	base::Bind(&InstallAttributes::OnCryptohomeServiceInitiallyAvailable,
	weak_ptr_factory_.GetWeakPtr()));

	if (!base::PathExists(cache_file))
	return;

	device_locked_ = true;

	char buf[16384];
	int len = base::ReadFile(cache_file, buf, sizeof(buf));
	if (len == -1 \|\| len >= static_cast<int>(sizeof(buf))) {
	PLOG(ERROR) << "Failed to read " << cache_file.value();
	return;
	}

	cryptohome::SerializedInstallAttributes install_attrs_proto;
	if (!install_attrs_proto.ParseFromArray(buf, len)) {
	LOG(ERROR) << "Failed to parse install attributes cache.";
	return;
	}

	google::protobuf::RepeatedPtrField<
	const cryptohome::SerializedInstallAttributes::Attribute>::iterator entry;
	std::map<std::string, std::string> attr_map;
	for (entry = install_attrs_proto.attributes().begin();
	entry != install_attrs_proto.attributes().end();
	++entry) {
	// The protobuf values contain terminating null characters, so we have to
	// sanitize the value here.
	attr_map.insert(std::make_pair(entry->name(),
	std::string(entry->value().c_str())));
	}

	DecodeInstallAttributes(attr_map);
	}

	void InstallAttributes::ReadImmutableAttributes(const base::Closure& callback) {
	if (device_locked_) {
	callback.Run();
	return;
	}

	cryptohome_client_->InstallAttributesIsReady(
	base::Bind(&InstallAttributes::ReadAttributesIfReady,
	weak_ptr_factory_.GetWeakPtr(), callback));
	}

	void InstallAttributes::ReadAttributesIfReady(const base::Closure& callback,
	DBusMethodCallStatus call_status,
	bool result) {
	if (call_status == DBUS_METHOD_CALL_SUCCESS && result) {
	registration_mode_ = policy::DEVICE_MODE_NOT_SET;
	if (!cu::InstallAttributesIsInvalid() &&
	!cu::InstallAttributesIsFirstInstall()) {
	device_locked_ = true;

	static const char* const kEnterpriseAttributes[] = {
	kAttrEnterpriseDeviceId,
	kAttrEnterpriseDomain,
	kAttrEnterpriseRealm,
	kAttrEnterpriseMode,
	kAttrEnterpriseOwned,
	kAttrEnterpriseUser,
	kAttrConsumerKioskEnabled,
	};
	std::map<std::string, std::string> attr_map;
	for (size_t i = 0; i < arraysize(kEnterpriseAttributes); ++i) {
	std::string value;
	if (cu::InstallAttributesGet(kEnterpriseAttributes[i], &value))
	attr_map[kEnterpriseAttributes[i]] = value;
	}

	DecodeInstallAttributes(attr_map);
	}
	}
	callback.Run();
	}

	void InstallAttributes::LockDevice(policy::DeviceMode device_mode,
	const std::string& domain,
	const std::string& realm,
	const std::string& device_id,
	const LockResultCallback& callback) {
	CHECK((device_mode == policy::DEVICE_MODE_ENTERPRISE &&
	!domain.empty() && realm.empty() && !device_id.empty()) \|\|
	(device_mode == policy::DEVICE_MODE_ENTERPRISE_AD &&
	domain.empty() && !realm.empty() && !device_id.empty()) \|\|
	(device_mode == policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH &&
	domain.empty() && realm.empty() && device_id.empty()));
	DCHECK(!callback.is_null());
	CHECK_EQ(device_lock_running_, false);

	// Check for existing lock first.
	if (device_locked_) {
	if (device_mode != registration_mode_) {
	LOG(ERROR) << "Trying to re-lock with wrong mode.";
	callback.Run(LOCK_WRONG_MODE);
	return;
	}

	if (domain != registration_domain_ \|\|
	realm != registration_realm_ \|\|
	device_id != registration_device_id_) {
	LOG(ERROR) << "Trying to re-lock with non-matching parameters.";
	callback.Run(LOCK_WRONG_DOMAIN);
	return;
	}

	// Already locked in the right mode, signal success.
	callback.Run(LOCK_SUCCESS);
	return;
	}

	// In case the consistency check is still running, postpone the device locking
	// until it has finished. This should not introduce additional delay since
	// device locking must wait for TPM initialization anyways.
	if (consistency_check_running_) {
	CHECK(post_check_action_.is_null());
	post_check_action_ = base::Bind(&InstallAttributes::LockDevice,
	weak_ptr_factory_.GetWeakPtr(),
	device_mode,
	domain,
	realm,
	device_id,
	callback);
	return;
	}

	device_lock_running_ = true;
	cryptohome_client_->InstallAttributesIsReady(
	base::Bind(&InstallAttributes::LockDeviceIfAttributesIsReady,
	weak_ptr_factory_.GetWeakPtr(),
	device_mode,
	domain,
	realm,
	device_id,
	callback));
	}

	void InstallAttributes::LockDeviceIfAttributesIsReady(
	policy::DeviceMode device_mode,
	const std::string& domain,
	const std::string& realm,
	const std::string& device_id,
	const LockResultCallback& callback,
	DBusMethodCallStatus call_status,
	bool result) {
	if (call_status != DBUS_METHOD_CALL_SUCCESS \|\| !result) {
	device_lock_running_ = false;
	callback.Run(LOCK_NOT_READY);
	return;
	}

	// Clearing the TPM password seems to be always a good deal.
	if (cu::TpmIsEnabled() && !cu::TpmIsBeingOwned() && cu::TpmIsOwned()) {
	cryptohome_client_->CallTpmClearStoredPasswordAndBlock();
	}

	// Make sure we really have a working InstallAttrs.
	if (cu::InstallAttributesIsInvalid()) {
	LOG(ERROR) << "Install attributes invalid.";
	device_lock_running_ = false;
	callback.Run(LOCK_BACKEND_INVALID);
	return;
	}

	if (!cu::InstallAttributesIsFirstInstall()) {
	LOG(ERROR) << "Install attributes already installed.";
	device_lock_running_ = false;
	callback.Run(LOCK_ALREADY_LOCKED);
	return;
	}

	// Set values in the InstallAttrs.
	std::string kiosk_enabled, enterprise_owned;
	if (device_mode == policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH) {
	kiosk_enabled = "true";
	} else {
	enterprise_owned = "true";
	}
	std::string mode = GetDeviceModeString(device_mode);
	if (!cu::InstallAttributesSet(kAttrConsumerKioskEnabled, kiosk_enabled) \|\|
	!cu::InstallAttributesSet(kAttrEnterpriseOwned, enterprise_owned) \|\|
	!cu::InstallAttributesSet(kAttrEnterpriseMode, mode) \|\|
	!cu::InstallAttributesSet(kAttrEnterpriseDomain, domain) \|\|
	!cu::InstallAttributesSet(kAttrEnterpriseRealm, realm) \|\|
	!cu::InstallAttributesSet(kAttrEnterpriseDeviceId, device_id)) {
	LOG(ERROR) << "Failed writing attributes.";
	device_lock_running_ = false;
	callback.Run(LOCK_SET_ERROR);
	return;
	}

	if (!cu::InstallAttributesFinalize() \|\|
	cu::InstallAttributesIsFirstInstall()) {
	LOG(ERROR) << "Failed locking.";
	device_lock_running_ = false;
	callback.Run(LOCK_FINALIZE_ERROR);
	return;
	}

	ReadImmutableAttributes(
	base::Bind(&InstallAttributes::OnReadImmutableAttributes,
	weak_ptr_factory_.GetWeakPtr(),
	device_mode,
	domain,
	realm,
	device_id,
	callback));
	}

	void InstallAttributes::OnReadImmutableAttributes(
	policy::DeviceMode mode,
	const std::string& domain,
	const std::string& realm,
	const std::string& device_id,
	const LockResultCallback& callback) {
	device_lock_running_ = false;

	if (registration_mode_ != mode \|\|
	registration_domain_ != domain \|\|
	registration_realm_ != realm \|\|
	registration_device_id_ != device_id) {
	LOG(ERROR) << "Locked data doesn't match.";
	callback.Run(LOCK_READBACK_ERROR);
	return;
	}

	callback.Run(LOCK_SUCCESS);
	}

	bool InstallAttributes::IsEnterpriseManaged() const {
	if (!device_locked_) {
	return false;
	}
	return registration_mode_ == policy::DEVICE_MODE_ENTERPRISE \|\|
	registration_mode_ == policy::DEVICE_MODE_ENTERPRISE_AD;
	}

	bool InstallAttributes::IsActiveDirectoryManaged() const {
	if (!device_locked_) {
	return false;
	}
	return registration_mode_ == policy::DEVICE_MODE_ENTERPRISE_AD;
	}

	bool InstallAttributes::IsCloudManaged() const {
	if (!device_locked_) {
	return false;
	}
	return registration_mode_ == policy::DEVICE_MODE_ENTERPRISE;
	}

	bool InstallAttributes::IsConsumerKioskDeviceWithAutoLaunch() {
	return device_locked_ &&
	registration_mode_ == policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH;
	}

	void InstallAttributes::TriggerConsistencyCheck(int dbus_retries) {
	cryptohome_client_->TpmIsOwned(
	base::Bind(&InstallAttributes::OnTpmOwnerCheckCompleted,
	weak_ptr_factory_.GetWeakPtr(),
	dbus_retries));
	}

	void InstallAttributes::OnTpmOwnerCheckCompleted(
	int dbus_retries_remaining,
	DBusMethodCallStatus call_status,
	bool result) {
	if (call_status != DBUS_METHOD_CALL_SUCCESS && dbus_retries_remaining) {
	base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
	FROM_HERE,
	base::Bind(&InstallAttributes::TriggerConsistencyCheck,
	weak_ptr_factory_.GetWeakPtr(), dbus_retries_remaining - 1),
	base::TimeDelta::FromSeconds(kDbusRetryIntervalInSeconds));
	return;
	}

	base::HistogramBase::Sample state = device_locked_;
	state \|= 0x2 * (registration_mode_ == policy::DEVICE_MODE_ENTERPRISE);
	if (call_status == DBUS_METHOD_CALL_SUCCESS)
	state \|= 0x4 * result;
	else
	state = 0x8; // This case is not a bit mask.
	UMA_HISTOGRAM_ENUMERATION("Enterprise.AttributesTPMConsistency", state, 9);

	// Run any action (LockDevice call) that might have queued behind the
	// consistency check.
	consistency_check_running_ = false;
	if (!post_check_action_.is_null()) {
	post_check_action_.Run();
	post_check_action_.Reset();
	}
	}

	// Warning: The values for these keys (but not the keys themselves) are stored
	// in the protobuf with a trailing zero. Also note that some of these constants
	// have been copied to login_manager/device_policy_service.cc. Please make sure
	// that all changes to the constants are reflected there as well.
	const char InstallAttributes::kConsumerDeviceMode[] = "consumer";
	const char InstallAttributes::kEnterpriseDeviceMode[] = "enterprise";
	const char InstallAttributes::kEnterpriseADDeviceMode[] = "enterprise_ad";
	const char InstallAttributes::kLegacyRetailDeviceMode[] = "kiosk";
	const char InstallAttributes::kConsumerKioskDeviceMode[] = "consumer_kiosk";

	const char InstallAttributes::kAttrEnterpriseDeviceId[] =
	"enterprise.device_id";
	const char InstallAttributes::kAttrEnterpriseDomain[] = "enterprise.domain";
	const char InstallAttributes::kAttrEnterpriseRealm[] = "enterprise.realm";
	const char InstallAttributes::kAttrEnterpriseMode[] = "enterprise.mode";
	const char InstallAttributes::kAttrEnterpriseOwned[] = "enterprise.owned";
	const char InstallAttributes::kAttrEnterpriseUser[] = "enterprise.user";
	const char InstallAttributes::kAttrConsumerKioskEnabled[] =
	"consumer.app_kiosk_enabled";

	void InstallAttributes::OnCryptohomeServiceInitiallyAvailable(
	bool service_is_ready) {
	if (!service_is_ready)
	LOG(ERROR) << "Failed waiting for cryptohome D-Bus service availability.";

	// Start the consistency check even if we failed to wait for availability;
	// hopefully the service will become available eventually.
	TriggerConsistencyCheck(kDbusRetryCount);
	}

	std::string InstallAttributes::GetDeviceModeString(policy::DeviceMode mode) {
	switch (mode) {
	case policy::DEVICE_MODE_CONSUMER:
	return InstallAttributes::kConsumerDeviceMode;
	case policy::DEVICE_MODE_ENTERPRISE:
	return InstallAttributes::kEnterpriseDeviceMode;
	case policy::DEVICE_MODE_ENTERPRISE_AD:
	return InstallAttributes::kEnterpriseADDeviceMode;
	case policy::DEVICE_MODE_LEGACY_RETAIL_MODE:
	return InstallAttributes::kLegacyRetailDeviceMode;
	case policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH:
	return InstallAttributes::kConsumerKioskDeviceMode;
	case policy::DEVICE_MODE_PENDING:
	case policy::DEVICE_MODE_NOT_SET:
	break;
	}
	NOTREACHED() << "Invalid device mode: " << mode;
	return std::string();
	}

	policy::DeviceMode InstallAttributes::GetDeviceModeFromString(
	const std::string& mode) {
	if (mode == InstallAttributes::kConsumerDeviceMode)
	return policy::DEVICE_MODE_CONSUMER;
	else if (mode == InstallAttributes::kEnterpriseDeviceMode)
	return policy::DEVICE_MODE_ENTERPRISE;
	else if (mode == InstallAttributes::kEnterpriseADDeviceMode)
	return policy::DEVICE_MODE_ENTERPRISE_AD;
	else if (mode == InstallAttributes::kLegacyRetailDeviceMode)
	return policy::DEVICE_MODE_LEGACY_RETAIL_MODE;
	else if (mode == InstallAttributes::kConsumerKioskDeviceMode)
	return policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH;
	return policy::DEVICE_MODE_NOT_SET;
	}

	void InstallAttributes::DecodeInstallAttributes(
	const std::map<std::string, std::string>& attr_map) {
	// Start from a clean slate.
	registration_mode_ = policy::DEVICE_MODE_NOT_SET;
	registration_domain_.clear();
	registration_realm_.clear();
	registration_device_id_.clear();

	const std::string enterprise_owned =
	ReadMapKey(attr_map, kAttrEnterpriseOwned);
	const std::string consumer_kiosk_enabled =
	ReadMapKey(attr_map, kAttrConsumerKioskEnabled);
	const std::string mode = ReadMapKey(attr_map, kAttrEnterpriseMode);
	const std::string domain = ReadMapKey(attr_map, kAttrEnterpriseDomain);
	const std::string realm = ReadMapKey(attr_map, kAttrEnterpriseRealm);
	const std::string device_id = ReadMapKey(attr_map, kAttrEnterpriseDeviceId);
	const std::string user_deprecated = ReadMapKey(attr_map, kAttrEnterpriseUser);

	if (enterprise_owned == "true") {
	WarnIfNonempty(attr_map, kAttrConsumerKioskEnabled);
	registration_device_id_ = device_id;

	// Set registration_mode_.
	registration_mode_ = GetDeviceModeFromString(mode);
	if (registration_mode_ != policy::DEVICE_MODE_ENTERPRISE &&
	registration_mode_ != policy::DEVICE_MODE_ENTERPRISE_AD) {
	if (!mode.empty()) {
	LOG(WARNING) << "Bad " << kAttrEnterpriseMode << ": " << mode;
	}
	registration_mode_ = policy::DEVICE_MODE_ENTERPRISE;
	}

	if (registration_mode_ == policy::DEVICE_MODE_ENTERPRISE) {
	// Either set registration_domain_ ...
	WarnIfNonempty(attr_map, kAttrEnterpriseRealm);
	if (!domain.empty()) {
	// The canonicalization is for compatibility with earlier versions.
	registration_domain_ = gaia::CanonicalizeDomain(domain);
	} else if (!user_deprecated.empty()) {
	// Compatibility for pre M19 code.
	registration_domain_ = gaia::ExtractDomainName(user_deprecated);
	} else {
	LOG(WARNING) << "Couldn't read domain.";
	}
	} else {
	// ... or set registration_realm_.
	WarnIfNonempty(attr_map, kAttrEnterpriseDomain);
	if (!realm.empty()) {
	registration_realm_ = realm;
	} else {
	LOG(WARNING) << "Couldn't read realm.";
	}
	}

	return;
	}

	WarnIfNonempty(attr_map, kAttrEnterpriseOwned);
	WarnIfNonempty(attr_map, kAttrEnterpriseDomain);
	WarnIfNonempty(attr_map, kAttrEnterpriseRealm);
	WarnIfNonempty(attr_map, kAttrEnterpriseDeviceId);
	WarnIfNonempty(attr_map, kAttrEnterpriseUser);
	if (consumer_kiosk_enabled == "true") {
	registration_mode_ = policy::DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH;
	return;
	}

	WarnIfNonempty(attr_map, kAttrConsumerKioskEnabled);
	if (user_deprecated.empty()) {
	registration_mode_ = policy::DEVICE_MODE_CONSUMER;
	}
	}

	} // namespace chromeos