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// 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/policy/enterprise_install_attributes.h"
#include "base/logging.h"
#include "chrome/browser/chromeos/cros/cryptohome_library.h"
#include "chrome/common/net/gaia/gaia_auth_util.h"
namespace policy {
namespace {
// Constants for the possible device modes that can be stored in the lockbox.
const char kConsumerDeviceMode[] = "consumer";
const char kEnterpiseDeviceMode[] = "enterprise";
const char kKioskDeviceMode[] = "kiosk";
const char kUnknownDeviceMode[] = "unknown";
// Field names in the lockbox.
const char kAttrEnterpriseDeviceId[] = "enterprise.device_id";
const char kAttrEnterpriseDomain[] = "enterprise.domain";
const char kAttrEnterpriseMode[] = "enterprise.mode";
const char kAttrEnterpriseOwned[] = "enterprise.owned";
const char kAttrEnterpriseUser[] = "enterprise.user";
// Translates DeviceMode constants to strings used in the lockbox.
std::string GetDeviceModeString(DeviceMode mode) {
switch (mode) {
case DEVICE_MODE_CONSUMER:
return kConsumerDeviceMode;
case DEVICE_MODE_ENTERPRISE:
return kEnterpiseDeviceMode;
case DEVICE_MODE_KIOSK:
return kKioskDeviceMode;
case DEVICE_MODE_PENDING:
case DEVICE_MODE_NOT_SET:
break;
}
NOTREACHED() << "Invalid device mode: " << mode;
return kUnknownDeviceMode;
}
// Translates strings used in the lockbox to DeviceMode values.
DeviceMode GetDeviceModeFromString(
const std::string& mode) {
if (mode == kConsumerDeviceMode)
return DEVICE_MODE_CONSUMER;
else if (mode == kEnterpiseDeviceMode)
return DEVICE_MODE_ENTERPRISE;
else if (mode == kKioskDeviceMode)
return DEVICE_MODE_KIOSK;
NOTREACHED() << "Unknown device mode string: " << mode;
return DEVICE_MODE_NOT_SET;
}
} // namespace
EnterpriseInstallAttributes::EnterpriseInstallAttributes(
chromeos::CryptohomeLibrary* cryptohome)
: cryptohome_(cryptohome),
device_locked_(false),
registration_mode_(DEVICE_MODE_PENDING) {}
EnterpriseInstallAttributes::LockResult EnterpriseInstallAttributes::LockDevice(
const std::string& user,
DeviceMode device_mode,
const std::string& device_id) {
CHECK_NE(device_mode, DEVICE_MODE_PENDING);
CHECK_NE(device_mode, DEVICE_MODE_NOT_SET);
std::string domain = gaia::ExtractDomainName(user);
// Check for existing lock first.
if (device_locked_) {
return !registration_domain_.empty() && domain == registration_domain_ ?
LOCK_SUCCESS : LOCK_WRONG_USER;
}
if (!cryptohome_ || !cryptohome_->InstallAttributesIsReady())
return LOCK_NOT_READY;
// Clearing the TPM password seems to be always a good deal.
if (cryptohome_->TpmIsEnabled() &&
!cryptohome_->TpmIsBeingOwned() &&
cryptohome_->TpmIsOwned()) {
cryptohome_->TpmClearStoredPassword();
}
// Make sure we really have a working InstallAttrs.
if (cryptohome_->InstallAttributesIsInvalid()) {
LOG(ERROR) << "Install attributes invalid.";
return LOCK_BACKEND_ERROR;
}
if (!cryptohome_->InstallAttributesIsFirstInstall())
return LOCK_WRONG_USER;
std::string mode = GetDeviceModeString(device_mode);
// Set values in the InstallAttrs and lock it.
if (!cryptohome_->InstallAttributesSet(kAttrEnterpriseOwned, "true") ||
!cryptohome_->InstallAttributesSet(kAttrEnterpriseUser, user) ||
!cryptohome_->InstallAttributesSet(kAttrEnterpriseDomain, domain) ||
!cryptohome_->InstallAttributesSet(kAttrEnterpriseMode, mode) ||
!cryptohome_->InstallAttributesSet(kAttrEnterpriseDeviceId, device_id)) {
LOG(ERROR) << "Failed writing attributes";
return LOCK_BACKEND_ERROR;
}
if (!cryptohome_->InstallAttributesFinalize() ||
cryptohome_->InstallAttributesIsFirstInstall() ||
GetRegistrationUser() != user) {
LOG(ERROR) << "Failed locking.";
return LOCK_BACKEND_ERROR;
}
return LOCK_SUCCESS;
}
bool EnterpriseInstallAttributes::IsEnterpriseDevice() {
ReadImmutableAttributes();
return device_locked_ && !registration_user_.empty();
}
std::string EnterpriseInstallAttributes::GetRegistrationUser() {
ReadImmutableAttributes();
if (!device_locked_)
return std::string();
return registration_user_;
}
std::string EnterpriseInstallAttributes::GetDomain() {
if (!IsEnterpriseDevice())
return std::string();
return registration_domain_;
}
std::string EnterpriseInstallAttributes::GetDeviceId() {
if (!IsEnterpriseDevice())
return std::string();
return registration_device_id_;
}
DeviceMode EnterpriseInstallAttributes::GetMode() {
ReadImmutableAttributes();
return registration_mode_;
}
void EnterpriseInstallAttributes::ReadImmutableAttributes() {
if (device_locked_)
return;
if (cryptohome_ && cryptohome_->InstallAttributesIsReady()) {
registration_mode_ = DEVICE_MODE_NOT_SET;
if (!cryptohome_->InstallAttributesIsInvalid() &&
!cryptohome_->InstallAttributesIsFirstInstall()) {
device_locked_ = true;
std::string enterprise_owned;
std::string enterprise_user;
if (cryptohome_->InstallAttributesGet(kAttrEnterpriseOwned,
&enterprise_owned) &&
cryptohome_->InstallAttributesGet(kAttrEnterpriseUser,
&enterprise_user) &&
enterprise_owned == "true" &&
!enterprise_user.empty()) {
registration_user_ = gaia::CanonicalizeEmail(enterprise_user);
// Initialize the mode to the legacy enterprise mode here and update
// below if more information is present.
registration_mode_ = DEVICE_MODE_ENTERPRISE;
// If we could extract basic setting we should try to extract the
// extended ones too. We try to set these to defaults as good as
// as possible if present, which could happen for device enrolled in
// pre 19 revisions of the code, before these new attributes were added.
if (cryptohome_->InstallAttributesGet(kAttrEnterpriseDomain,
®istration_domain_)) {
registration_domain_ = gaia::CanonicalizeDomain(registration_domain_);
} else {
registration_domain_ = gaia::ExtractDomainName(registration_user_);
}
if (!cryptohome_->InstallAttributesGet(kAttrEnterpriseDeviceId,
®istration_device_id_)) {
registration_device_id_.clear();
}
std::string mode;
if (cryptohome_->InstallAttributesGet(kAttrEnterpriseMode, &mode))
registration_mode_ = GetDeviceModeFromString(mode);
} else if (enterprise_user.empty() && enterprise_owned != "true") {
// |registration_user_| is empty on consumer devices.
registration_mode_ = DEVICE_MODE_CONSUMER;
}
}
}
}
} // namespace policy
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