Split up chrome/browser/policy subdirectory

chrome/browser/policy/auto_enrollment_client.cc

Index: chrome/browser/policy/auto_enrollment_client.cc
diff --git a/chrome/browser/policy/auto_enrollment_client.cc b/chrome/browser/policy/auto_enrollment_client.cc
deleted file mode 100644
index e94a3bede31955adc1df7f0e73c563024943907f..0000000000000000000000000000000000000000
--- a/chrome/browser/policy/auto_enrollment_client.cc
+++ /dev/null
@@ -1,337 +0,0 @@
-// 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/auto_enrollment_client.h"
-
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/guid.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/message_loop_proxy.h"
-#include "base/metrics/histogram.h"
-#include "base/prefs/pref_registry_simple.h"
-#include "base/prefs/pref_service.h"
-#include "base/strings/string_number_conversions.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/policy/browser_policy_connector.h"
-#include "chrome/browser/policy/device_cloud_policy_manager_chromeos.h"
-#include "chrome/browser/policy/device_management_service.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
-#include "crypto/sha2.h"
-
-namespace em = enterprise_management;
-
-namespace {
-
-// The modulus value is sent in an int64 field in the protobuf, whose maximum
-// value is 2^63-1. So 2^64 and 2^63 can't be represented as moduli and the
-// max is 2^62 (when the moduli are restricted to powers-of-2).
-const int kMaximumPower = 62;
-
-// Returns the int value of the |switch_name| argument, clamped to the [0, 62]
-// interval. Returns 0 if the argument doesn't exist or isn't an int value.
-int GetSanitizedArg(const std::string& switch_name) {
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
-  if (!command_line->HasSwitch(switch_name))
-    return 0;
-  std::string value = command_line->GetSwitchValueASCII(switch_name);
-  int int_value;
-  if (!base::StringToInt(value, &int_value)) {
-    LOG(ERROR) << "Switch \"" << switch_name << "\" is not a valid int. "
-               << "Defaulting to 0.";
-    return 0;
-  }
-  if (int_value < 0) {
-    LOG(ERROR) << "Switch \"" << switch_name << "\" can't be negative. "
-               << "Using 0";
-    return 0;
-  }
-  if (int_value > kMaximumPower) {
-    LOG(ERROR) << "Switch \"" << switch_name << "\" can't be greater than "
-               << kMaximumPower << ". Using " << kMaximumPower;
-    return kMaximumPower;
-  }
-  return int_value;
-}
-
-// Returns the power of the next power-of-2 starting at |value|.
-int NextPowerOf2(int64 value) {
-  for (int i = 0; i <= kMaximumPower; ++i) {
-    if ((GG_INT64_C(1) << i) >= value)
-      return i;
-  }
-  // No other value can be represented in an int64.
-  return kMaximumPower + 1;
-}
-
-}  // namespace
-
-namespace policy {
-
-AutoEnrollmentClient::AutoEnrollmentClient(const base::Closure& callback,
-                                           DeviceManagementService* service,
-                                           PrefService* local_state,
-                                           const std::string& serial_number,
-                                           int power_initial,
-                                           int power_limit)
-    : completion_callback_(callback),
-      should_auto_enroll_(false),
-      device_id_(base::GenerateGUID()),
-      power_initial_(power_initial),
-      power_limit_(power_limit),
-      requests_sent_(0),
-      device_management_service_(service),
-      local_state_(local_state) {
-  DCHECK_LE(power_initial_, power_limit_);
-  if (!serial_number.empty())
-    serial_number_hash_ = crypto::SHA256HashString(serial_number);
-}
-
-AutoEnrollmentClient::~AutoEnrollmentClient() {}
-
-// static
-void AutoEnrollmentClient::RegisterPrefs(PrefRegistrySimple* registry) {
-  registry->RegisterBooleanPref(prefs::kShouldAutoEnroll, false);
-  registry->RegisterIntegerPref(prefs::kAutoEnrollmentPowerLimit, -1);
-}
-
-// static
-bool AutoEnrollmentClient::IsDisabled() {
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
-  return
-      !command_line->HasSwitch(switches::kEnterpriseEnrollmentInitialModulus) &&
-      !command_line->HasSwitch(switches::kEnterpriseEnrollmentModulusLimit);
-}
-
-// static
-AutoEnrollmentClient* AutoEnrollmentClient::Create(
-    const base::Closure& completion_callback) {
-  // The client won't do anything if |service| is NULL.
-  DeviceManagementService* service = NULL;
-  if (IsDisabled()) {
-    VLOG(1) << "Auto-enrollment is disabled";
-  } else {
-    std::string url = BrowserPolicyConnector::GetDeviceManagementUrl();
-    if (!url.empty()) {
-      service = new DeviceManagementService(url);
-      service->ScheduleInitialization(0);
-    }
-  }
-
-  int power_initial = GetSanitizedArg(
-      switches::kEnterpriseEnrollmentInitialModulus);
-  int power_limit = GetSanitizedArg(
-      switches::kEnterpriseEnrollmentModulusLimit);
-  if (power_initial > power_limit) {
-    LOG(ERROR) << "Initial auto-enrollment modulus is larger than the limit, "
-               << "clamping to the limit.";
-    power_initial = power_limit;
-  }
-
-  return new AutoEnrollmentClient(
-      completion_callback,
-      service,
-      g_browser_process->local_state(),
-      DeviceCloudPolicyManagerChromeOS::GetMachineID(),
-      power_initial,
-      power_limit);
-}
-
-// static
-void AutoEnrollmentClient::CancelAutoEnrollment() {
-  PrefService* local_state = g_browser_process->local_state();
-  local_state->SetBoolean(prefs::kShouldAutoEnroll, false);
-  local_state->CommitPendingWrite();
-}
-
-void AutoEnrollmentClient::Start() {
-  // Drop the previous job and reset state.
-  request_job_.reset();
-  should_auto_enroll_ = false;
-  time_start_ = base::Time();  // reset to null.
-
-  if (GetCachedDecision()) {
-    VLOG(1) << "AutoEnrollmentClient: using cached decision: "
-            << should_auto_enroll_;
-  } else if (device_management_service_.get()) {
-    if (serial_number_hash_.empty()) {
-      LOG(ERROR) << "Failed to get the hash of the serial number, "
-                 << "will not attempt to auto-enroll.";
-    } else {
-      time_start_ = base::Time::Now();
-      SendRequest(power_initial_);
-      // Don't invoke the callback now.
-      return;
-    }
-  }
-
-  // Auto-enrollment can't even start, so we're done.
-  OnProtocolDone();
-}
-
-void AutoEnrollmentClient::CancelAndDeleteSoon() {
-  if (time_start_.is_null()) {
-    // The client isn't running, just delete it.
-    delete this;
-  } else {
-    // Client still running, but our owner isn't interested in the result
-    // anymore. Wait until the protocol completes to measure the extra time
-    // needed.
-    time_extra_start_ = base::Time::Now();
-    completion_callback_.Reset();
-  }
-}
-
-bool AutoEnrollmentClient::GetCachedDecision() {
-  const PrefService::Preference* should_enroll_pref =
-      local_state_->FindPreference(prefs::kShouldAutoEnroll);
-  const PrefService::Preference* previous_limit_pref =
-      local_state_->FindPreference(prefs::kAutoEnrollmentPowerLimit);
-  bool should_auto_enroll = false;
-  int previous_limit = -1;
-
-  if (!should_enroll_pref ||
-      should_enroll_pref->IsDefaultValue() ||
-      !should_enroll_pref->GetValue()->GetAsBoolean(&should_auto_enroll) ||
-      !previous_limit_pref ||
-      previous_limit_pref->IsDefaultValue() ||
-      !previous_limit_pref->GetValue()->GetAsInteger(&previous_limit) ||
-      power_limit_ > previous_limit) {
-    return false;
-  }
-
-  should_auto_enroll_ = should_auto_enroll;
-  return true;
-}
-
-void AutoEnrollmentClient::SendRequest(int power) {
-  if (power < 0 || power > power_limit_ || serial_number_hash_.empty()) {
-    NOTREACHED();
-    OnProtocolDone();
-    return;
-  }
-
-  requests_sent_++;
-
-  // Only power-of-2 moduli are supported for now. These are computed by taking
-  // the lower |power| bits of the hash.
-  uint64 remainder = 0;
-  for (int i = 0; 8 * i < power; ++i) {
-    uint64 byte = serial_number_hash_[31 - i] & 0xff;
-    remainder = remainder | (byte << (8 * i));
-  }
-  remainder = remainder & ((GG_UINT64_C(1) << power) - 1);
-
-  request_job_.reset(
-      device_management_service_->CreateJob(
-          DeviceManagementRequestJob::TYPE_AUTO_ENROLLMENT));
-  request_job_->SetClientID(device_id_);
-  em::DeviceAutoEnrollmentRequest* request =
-      request_job_->GetRequest()->mutable_auto_enrollment_request();
-  request->set_remainder(remainder);
-  request->set_modulus(GG_INT64_C(1) << power);
-  request_job_->Start(base::Bind(&AutoEnrollmentClient::OnRequestCompletion,
-                                 base::Unretained(this)));
-}
-
-void AutoEnrollmentClient::OnRequestCompletion(
-    DeviceManagementStatus status,
-    const em::DeviceManagementResponse& response) {
-  if (status != DM_STATUS_SUCCESS || !response.has_auto_enrollment_response()) {
-    LOG(ERROR) << "Auto enrollment error: " << status;
-    OnProtocolDone();
-    return;
-  }
-
-  const em::DeviceAutoEnrollmentResponse& enrollment_response =
-      response.auto_enrollment_response();
-  if (enrollment_response.has_expected_modulus()) {
-    // Server is asking us to retry with a different modulus.
-    int64 modulus = enrollment_response.expected_modulus();
-    int power = NextPowerOf2(modulus);
-    if ((GG_INT64_C(1) << power) != modulus) {
-      LOG(WARNING) << "Auto enrollment: the server didn't ask for a power-of-2 "
-                   << "modulus. Using the closest power-of-2 instead "
-                   << "(" << modulus << " vs 2^" << power << ")";
-    }
-    if (requests_sent_ >= 2) {
-      LOG(ERROR) << "Auto enrollment error: already retried with an updated "
-                 << "modulus but the server asked for a new one again: "
-                 << power;
-    } else if (power > power_limit_) {
-      LOG(ERROR) << "Auto enrollment error: the server asked for a larger "
-                 << "modulus than the client accepts (" << power << " vs "
-                 << power_limit_ << ").";
-    } else {
-      // Retry at most once with the modulus that the server requested.
-      if (power <= power_initial_) {
-        LOG(WARNING) << "Auto enrollment: the server asked to use a modulus ("
-                     << power << ") that isn't larger than the first used ("
-                     << power_initial_ << "). Retrying anyway.";
-      }
-      SendRequest(power);
-      // Don't invoke the callback yet.
-      return;
-    }
-  } else {
-    // Server should have sent down a list of hashes to try.
-    should_auto_enroll_ = IsSerialInProtobuf(enrollment_response.hash());
-    LOG(INFO) << "Auto enrollment complete, should_auto_enroll = "
-              << should_auto_enroll_;
-  }
-
-  // Auto-enrollment done.
-  OnProtocolDone();
-}
-
-bool AutoEnrollmentClient::IsSerialInProtobuf(
-      const google::protobuf::RepeatedPtrField<std::string>& hashes) {
-  for (int i = 0; i < hashes.size(); ++i) {
-    if (hashes.Get(i) == serial_number_hash_)
-      return true;
-  }
-  return false;
-}
-
-void AutoEnrollmentClient::OnProtocolDone() {
-  static const char* kProtocolTime = "Enterprise.AutoEnrollmentProtocolTime";
-  static const char* kExtraTime = "Enterprise.AutoEnrollmentExtraTime";
-  // The mininum time can't be 0, must be at least 1.
-  static const base::TimeDelta kMin = base::TimeDelta::FromMilliseconds(1);
-  static const base::TimeDelta kMax = base::TimeDelta::FromMinutes(5);
-  // However, 0 can still be sampled.
-  static const base::TimeDelta kZero = base::TimeDelta::FromMilliseconds(0);
-  static const int kBuckets = 50;
-
-  base::Time now = base::Time::Now();
-  if (!time_start_.is_null()) {
-    base::TimeDelta delta = now - time_start_;
-    UMA_HISTOGRAM_CUSTOM_TIMES(kProtocolTime, delta, kMin, kMax, kBuckets);
-    time_start_ = base::Time();
-
-    // The decision is cached only if the protocol was actually started, which
-    // is the case only if |time_start_| was not null.
-    local_state_->SetBoolean(prefs::kShouldAutoEnroll, should_auto_enroll_);
-    local_state_->SetInteger(prefs::kAutoEnrollmentPowerLimit, power_limit_);
-    local_state_->CommitPendingWrite();
-  }
-  base::TimeDelta delta = kZero;
-  if (!time_extra_start_.is_null()) {
-    // CancelAndDeleteSoon() was invoked before.
-    delta = now - time_extra_start_;
-    base::MessageLoopProxy::current()->DeleteSoon(FROM_HERE, this);
-    time_extra_start_ = base::Time();
-  }
-  // This samples |kZero| when there was no need for extra time, so that we can
-  // measure the ratio of users that succeeded without needing a delay to the
-  // total users going through OOBE.
-  UMA_HISTOGRAM_CUSTOM_TIMES(kExtraTime, delta, kMin, kMax, kBuckets);
-
-  if (!completion_callback_.is_null())
-    completion_callback_.Run();
-}
-
-}  // namespace policy