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Side by Side Diff: chrome/browser/chromeos/ownership/owner_settings_service.cc

Issue 548323003: Non-plafrom-specific part of an OwnerSettingsService is moved to components/ownership/*. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 6 years, 3 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/chromeos/ownership/owner_settings_service.h"
6
7 #include <string>
8
9 #include "base/bind.h"
10 #include "base/bind_helpers.h"
11 #include "base/command_line.h"
12 #include "base/prefs/pref_service.h"
13 #include "chrome/browser/chrome_notification_types.h"
14 #include "chrome/browser/chromeos/profiles/profile_helper.h"
15 #include "chrome/browser/chromeos/settings/cros_settings.h"
16 #include "chrome/browser/chromeos/settings/session_manager_operation.h"
17 #include "chrome/browser/profiles/profile.h"
18 #include "chromeos/dbus/dbus_thread_manager.h"
19 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
20 #include "content/public/browser/browser_thread.h"
21 #include "content/public/browser/notification_details.h"
22 #include "content/public/browser/notification_service.h"
23 #include "content/public/browser/notification_source.h"
24 #include "content/public/common/content_switches.h"
25 #include "crypto/nss_util.h"
26 #include "crypto/nss_util_internal.h"
27 #include "crypto/rsa_private_key.h"
28 #include "crypto/scoped_nss_types.h"
29 #include "crypto/signature_creator.h"
30
31 namespace em = enterprise_management;
32
33 using content::BrowserThread;
34 using ownership::OwnerKeyUtil;
35 using ownership::PrivateKey;
36 using ownership::PublicKey;
37
38 namespace chromeos {
39
40 namespace {
41
42 DeviceSettingsService* g_device_settings_service_for_testing = NULL;
43
44 bool IsOwnerInTests(const std::string& user_id) {
45 if (user_id.empty() ||
46 !CommandLine::ForCurrentProcess()->HasSwitch(::switches::kTestType) ||
47 !CrosSettings::IsInitialized()) {
48 return false;
49 }
50 const base::Value* value = CrosSettings::Get()->GetPref(kDeviceOwner);
51 if (!value || value->GetType() != base::Value::TYPE_STRING)
52 return false;
53 return static_cast<const base::StringValue*>(value)->GetString() == user_id;
54 }
55
56 // Assembles PolicyData based on |settings|, |policy_data| and
57 // |user_id|.
58 scoped_ptr<em::PolicyData> AssemblePolicy(
59 const std::string& user_id,
60 const em::PolicyData* policy_data,
61 const em::ChromeDeviceSettingsProto* settings) {
62 scoped_ptr<em::PolicyData> policy(new em::PolicyData());
63 if (policy_data) {
64 // Preserve management settings.
65 if (policy_data->has_management_mode())
66 policy->set_management_mode(policy_data->management_mode());
67 if (policy_data->has_request_token())
68 policy->set_request_token(policy_data->request_token());
69 if (policy_data->has_device_id())
70 policy->set_device_id(policy_data->device_id());
71 } else {
72 // If there's no previous policy data, this is the first time the device
73 // setting is set. We set the management mode to NOT_MANAGED initially.
74 policy->set_management_mode(em::PolicyData::NOT_MANAGED);
75 }
76 policy->set_policy_type(policy::dm_protocol::kChromeDevicePolicyType);
77 policy->set_timestamp(
78 (base::Time::Now() - base::Time::UnixEpoch()).InMilliseconds());
79 policy->set_username(user_id);
80 if (!settings->SerializeToString(policy->mutable_policy_value()))
81 return scoped_ptr<em::PolicyData>();
82
83 return policy.Pass();
84 }
85
86 std::string AssembleAndSignPolicy(scoped_ptr<em::PolicyData> policy,
87 crypto::RSAPrivateKey* private_key) {
88 // Assemble the policy.
89 em::PolicyFetchResponse policy_response;
90 if (!policy->SerializeToString(policy_response.mutable_policy_data())) {
91 LOG(ERROR) << "Failed to encode policy payload.";
92 return std::string();
93 }
94
95 // Generate the signature.
96 scoped_ptr<crypto::SignatureCreator> signature_creator(
97 crypto::SignatureCreator::Create(private_key));
98 signature_creator->Update(
99 reinterpret_cast<const uint8*>(policy_response.policy_data().c_str()),
100 policy_response.policy_data().size());
101 std::vector<uint8> signature_bytes;
102 std::string policy_blob;
103 if (!signature_creator->Final(&signature_bytes)) {
104 LOG(ERROR) << "Failed to create policy signature.";
105 return std::string();
106 }
107
108 policy_response.mutable_policy_data_signature()->assign(
109 reinterpret_cast<const char*>(vector_as_array(&signature_bytes)),
110 signature_bytes.size());
111 return policy_response.SerializeAsString();
112 }
113
114 void LoadPrivateKeyByPublicKey(
115 const scoped_refptr<OwnerKeyUtil>& owner_key_util,
116 scoped_refptr<PublicKey> public_key,
117 const std::string& username_hash,
118 const base::Callback<void(scoped_refptr<PublicKey> public_key,
119 scoped_refptr<PrivateKey> private_key)>&
120 callback) {
121 crypto::EnsureNSSInit();
122 crypto::ScopedPK11Slot slot =
123 crypto::GetPublicSlotForChromeOSUser(username_hash);
124 scoped_refptr<PrivateKey> private_key(new PrivateKey(
125 owner_key_util->FindPrivateKeyInSlot(public_key->data(), slot.get())));
126 BrowserThread::PostTask(BrowserThread::UI,
127 FROM_HERE,
128 base::Bind(callback, public_key, private_key));
129 }
130
131 void LoadPrivateKey(const scoped_refptr<OwnerKeyUtil>& owner_key_util,
132 const std::string username_hash,
133 const base::Callback<void(
134 scoped_refptr<PublicKey> public_key,
135 scoped_refptr<PrivateKey> private_key)>& callback) {
136 std::vector<uint8> public_key_data;
137 scoped_refptr<PublicKey> public_key;
138 if (!owner_key_util->ImportPublicKey(&public_key_data)) {
139 scoped_refptr<PrivateKey> private_key;
140 BrowserThread::PostTask(BrowserThread::UI,
141 FROM_HERE,
142 base::Bind(callback, public_key, private_key));
143 return;
144 }
145 public_key = new PublicKey();
146 public_key->data().swap(public_key_data);
147 bool rv = BrowserThread::PostTask(BrowserThread::IO,
148 FROM_HERE,
149 base::Bind(&LoadPrivateKeyByPublicKey,
150 owner_key_util,
151 public_key,
152 username_hash,
153 callback));
154 if (!rv) {
155 // IO thread doesn't exists in unit tests, but it's safe to use NSS from
156 // BlockingPool in unit tests.
157 LoadPrivateKeyByPublicKey(
158 owner_key_util, public_key, username_hash, callback);
159 }
160 }
161
162 bool DoesPrivateKeyExistAsyncHelper(
163 const scoped_refptr<OwnerKeyUtil>& owner_key_util) {
164 std::vector<uint8> public_key;
165 if (!owner_key_util->ImportPublicKey(&public_key))
166 return false;
167 scoped_ptr<crypto::RSAPrivateKey> key(
168 crypto::RSAPrivateKey::FindFromPublicKeyInfo(public_key));
169 bool is_owner = key.get() != NULL;
170 return is_owner;
171 }
172
173 // Checks whether NSS slots with private key are mounted or
174 // not. Responds via |callback|.
175 void DoesPrivateKeyExistAsync(
176 const scoped_refptr<OwnerKeyUtil>& owner_key_util,
177 const OwnerSettingsService::IsOwnerCallback& callback) {
178 if (!owner_key_util) {
179 callback.Run(false);
180 return;
181 }
182 scoped_refptr<base::TaskRunner> task_runner =
183 content::BrowserThread::GetBlockingPool()
184 ->GetTaskRunnerWithShutdownBehavior(
185 base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
186 base::PostTaskAndReplyWithResult(
187 task_runner.get(),
188 FROM_HERE,
189 base::Bind(&DoesPrivateKeyExistAsyncHelper, owner_key_util),
190 callback);
191 }
192
193 // Returns the current management mode.
194 em::PolicyData::ManagementMode GetManagementMode(
195 DeviceSettingsService* service) {
196 if (!service) {
197 LOG(ERROR) << "DeviceSettingsService is not initialized";
198 return em::PolicyData::NOT_MANAGED;
199 }
200
201 const em::PolicyData* policy_data = service->policy_data();
202 if (policy_data && policy_data->has_management_mode())
203 return policy_data->management_mode();
204 return em::PolicyData::NOT_MANAGED;
205 }
206
207 // Returns true if it is okay to transfer from the current mode to the new
208 // mode. This function should be called in SetManagementMode().
209 bool CheckManagementModeTransition(em::PolicyData::ManagementMode current_mode,
210 em::PolicyData::ManagementMode new_mode) {
211 // Mode is not changed.
212 if (current_mode == new_mode)
213 return true;
214
215 switch (current_mode) {
216 case em::PolicyData::NOT_MANAGED:
217 // For consumer management enrollment.
218 return new_mode == em::PolicyData::CONSUMER_MANAGED;
219
220 case em::PolicyData::ENTERPRISE_MANAGED:
221 // Management mode cannot be set when it is currently ENTERPRISE_MANAGED.
222 return false;
223
224 case em::PolicyData::CONSUMER_MANAGED:
225 // For consumer management unenrollment.
226 return new_mode == em::PolicyData::NOT_MANAGED;
227 }
228
229 NOTREACHED();
230 return false;
231 }
232
233 } // namespace
234
235 OwnerSettingsService::OwnerSettingsService(
236 Profile* profile,
237 const scoped_refptr<OwnerKeyUtil>& owner_key_util)
238 : profile_(profile),
239 owner_key_util_(owner_key_util),
240 waiting_for_profile_creation_(true),
241 waiting_for_tpm_token_(true),
242 weak_factory_(this) {
243 if (TPMTokenLoader::IsInitialized()) {
244 waiting_for_tpm_token_ = !TPMTokenLoader::Get()->IsTPMTokenReady();
245 TPMTokenLoader::Get()->AddObserver(this);
246 }
247
248 if (DBusThreadManager::IsInitialized() &&
249 DBusThreadManager::Get()->GetSessionManagerClient()) {
250 DBusThreadManager::Get()->GetSessionManagerClient()->AddObserver(this);
251 }
252
253 registrar_.Add(this,
254 chrome::NOTIFICATION_PROFILE_CREATED,
255 content::Source<Profile>(profile_));
256 }
257
258 OwnerSettingsService::~OwnerSettingsService() {
259 DCHECK(thread_checker_.CalledOnValidThread());
260 if (TPMTokenLoader::IsInitialized())
261 TPMTokenLoader::Get()->RemoveObserver(this);
262
263 if (DBusThreadManager::IsInitialized() &&
264 DBusThreadManager::Get()->GetSessionManagerClient()) {
265 DBusThreadManager::Get()->GetSessionManagerClient()->RemoveObserver(this);
266 }
267 }
268
269 bool OwnerSettingsService::IsOwner() {
270 DCHECK(thread_checker_.CalledOnValidThread());
271 return private_key_ && private_key_->key();
272 }
273
274 void OwnerSettingsService::IsOwnerAsync(const IsOwnerCallback& callback) {
275 DCHECK(thread_checker_.CalledOnValidThread());
276 if (private_key_) {
277 base::MessageLoop::current()->PostTask(FROM_HERE,
278 base::Bind(callback, IsOwner()));
279 } else {
280 pending_is_owner_callbacks_.push_back(callback);
281 }
282 }
283
284 bool OwnerSettingsService::AssembleAndSignPolicyAsync(
285 scoped_ptr<em::PolicyData> policy,
286 const AssembleAndSignPolicyCallback& callback) {
287 DCHECK(thread_checker_.CalledOnValidThread());
288 if (!IsOwner())
289 return false;
290 base::PostTaskAndReplyWithResult(
291 BrowserThread::GetBlockingPool(),
292 FROM_HERE,
293 base::Bind(
294 &AssembleAndSignPolicy, base::Passed(&policy), private_key_->key()),
295 callback);
296 return true;
297 }
298
299 void OwnerSettingsService::SignAndStoreAsync(
300 scoped_ptr<em::ChromeDeviceSettingsProto> settings,
301 const base::Closure& callback) {
302 DCHECK(thread_checker_.CalledOnValidThread());
303 scoped_ptr<em::PolicyData> policy = AssemblePolicy(
304 user_id_, GetDeviceSettingsService()->policy_data(), settings.get());
305 if (!policy) {
306 HandleError(DeviceSettingsService::STORE_POLICY_ERROR, callback);
307 return;
308 }
309
310 EnqueueSignAndStore(policy.Pass(), callback);
311 }
312
313 void OwnerSettingsService::SetManagementSettingsAsync(
314 em::PolicyData::ManagementMode management_mode,
315 const std::string& request_token,
316 const std::string& device_id,
317 const base::Closure& callback) {
318 em::PolicyData::ManagementMode current_mode =
319 GetManagementMode(GetDeviceSettingsService());
320 if (!CheckManagementModeTransition(current_mode, management_mode)) {
321 LOG(ERROR) << "Invalid management mode transition: current mode = "
322 << current_mode << ", new mode = " << management_mode;
323 HandleError(DeviceSettingsService::STORE_POLICY_ERROR, callback);
324 return;
325 }
326
327 DeviceSettingsService* service = GetDeviceSettingsService();
328 scoped_ptr<em::PolicyData> policy = AssemblePolicy(
329 user_id_, service->policy_data(), service->device_settings());
330 if (!policy) {
331 HandleError(DeviceSettingsService::STORE_POLICY_ERROR, callback);
332 return;
333 }
334
335 policy->set_management_mode(management_mode);
336 policy->set_request_token(request_token);
337 policy->set_device_id(device_id);
338
339 EnqueueSignAndStore(policy.Pass(), callback);
340 }
341
342 void OwnerSettingsService::Observe(
343 int type,
344 const content::NotificationSource& source,
345 const content::NotificationDetails& details) {
346 DCHECK(thread_checker_.CalledOnValidThread());
347 if (type != chrome::NOTIFICATION_PROFILE_CREATED) {
348 NOTREACHED();
349 return;
350 }
351
352 Profile* profile = content::Source<Profile>(source).ptr();
353 if (profile != profile_) {
354 NOTREACHED();
355 return;
356 }
357
358 waiting_for_profile_creation_ = false;
359 ReloadPrivateKey();
360 }
361
362 void OwnerSettingsService::OnTPMTokenReady() {
363 DCHECK(thread_checker_.CalledOnValidThread());
364 waiting_for_tpm_token_ = false;
365
366 // TPMTokenLoader initializes the TPM and NSS database which is necessary to
367 // determine ownership. Force a reload once we know these are initialized.
368 ReloadPrivateKey();
369 }
370
371 void OwnerSettingsService::OwnerKeySet(bool success) {
372 DCHECK(thread_checker_.CalledOnValidThread());
373 if (success)
374 ReloadPrivateKey();
375 }
376
377 // static
378 void OwnerSettingsService::IsOwnerForSafeModeAsync(
379 const std::string& user_id,
380 const std::string& user_hash,
381 const scoped_refptr<OwnerKeyUtil>& owner_key_util,
382 const IsOwnerCallback& callback) {
383 CHECK(chromeos::LoginState::Get()->IsInSafeMode());
384
385 // Make sure NSS is initialized and NSS DB is loaded for the user before
386 // searching for the owner key.
387 BrowserThread::PostTaskAndReply(
388 BrowserThread::IO,
389 FROM_HERE,
390 base::Bind(base::IgnoreResult(&crypto::InitializeNSSForChromeOSUser),
391 user_id,
392 user_hash,
393 ProfileHelper::GetProfilePathByUserIdHash(user_hash)),
394 base::Bind(&DoesPrivateKeyExistAsync, owner_key_util, callback));
395 }
396
397 // static
398 void OwnerSettingsService::SetDeviceSettingsServiceForTesting(
399 DeviceSettingsService* device_settings_service) {
400 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
401 g_device_settings_service_for_testing = device_settings_service;
402 }
403
404 void OwnerSettingsService::ReloadPrivateKey() {
405 DCHECK(thread_checker_.CalledOnValidThread());
406 if (waiting_for_profile_creation_ || waiting_for_tpm_token_)
407 return;
408 scoped_refptr<base::TaskRunner> task_runner =
409 content::BrowserThread::GetBlockingPool()
410 ->GetTaskRunnerWithShutdownBehavior(
411 base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
412 task_runner->PostTask(
413 FROM_HERE,
414 base::Bind(&LoadPrivateKey,
415 GetOwnerKeyUtil(),
416 ProfileHelper::GetUserIdHashFromProfile(profile_),
417 base::Bind(&OwnerSettingsService::OnPrivateKeyLoaded,
418 weak_factory_.GetWeakPtr())));
419 }
420
421 void OwnerSettingsService::OnPrivateKeyLoaded(
422 scoped_refptr<PublicKey> public_key,
423 scoped_refptr<PrivateKey> private_key) {
424 DCHECK(thread_checker_.CalledOnValidThread());
425 public_key_ = public_key;
426 private_key_ = private_key;
427
428 user_id_ = profile_->GetProfileName();
429 const bool is_owner = IsOwner() || IsOwnerInTests(user_id_);
430 if (is_owner && GetDeviceSettingsService())
431 GetDeviceSettingsService()->InitOwner(user_id_, weak_factory_.GetWeakPtr());
432
433 std::vector<IsOwnerCallback> is_owner_callbacks;
434 is_owner_callbacks.swap(pending_is_owner_callbacks_);
435 for (std::vector<IsOwnerCallback>::iterator it(is_owner_callbacks.begin());
436 it != is_owner_callbacks.end();
437 ++it) {
438 it->Run(is_owner);
439 }
440 }
441
442 void OwnerSettingsService::EnqueueSignAndStore(
443 scoped_ptr<em::PolicyData> policy,
444 const base::Closure& callback) {
445 SignAndStoreSettingsOperation* operation = new SignAndStoreSettingsOperation(
446 base::Bind(&OwnerSettingsService::HandleCompletedOperation,
447 weak_factory_.GetWeakPtr(),
448 callback),
449 policy.Pass());
450 operation->set_delegate(weak_factory_.GetWeakPtr());
451 pending_operations_.push_back(operation);
452 if (pending_operations_.front() == operation)
453 StartNextOperation();
454 }
455
456 void OwnerSettingsService::StartNextOperation() {
457 DeviceSettingsService* service = GetDeviceSettingsService();
458 if (!pending_operations_.empty() && service &&
459 service->session_manager_client()) {
460 pending_operations_.front()->Start(
461 service->session_manager_client(), GetOwnerKeyUtil(), public_key_);
462 }
463 }
464
465 void OwnerSettingsService::HandleCompletedOperation(
466 const base::Closure& callback,
467 SessionManagerOperation* operation,
468 DeviceSettingsService::Status status) {
469 DCHECK_EQ(operation, pending_operations_.front());
470
471 DeviceSettingsService* service = GetDeviceSettingsService();
472 if (status == DeviceSettingsService::STORE_SUCCESS) {
473 service->set_policy_data(operation->policy_data().Pass());
474 service->set_device_settings(operation->device_settings().Pass());
475 }
476
477 if ((operation->public_key() && !public_key_) ||
478 (operation->public_key() && public_key_ &&
479 operation->public_key()->data() != public_key_->data())) {
480 // Public part changed so we need to reload private part too.
481 ReloadPrivateKey();
482 content::NotificationService::current()->Notify(
483 chrome::NOTIFICATION_OWNERSHIP_STATUS_CHANGED,
484 content::Source<OwnerSettingsService>(this),
485 content::NotificationService::NoDetails());
486 }
487 service->OnSignAndStoreOperationCompleted(status);
488 if (!callback.is_null())
489 callback.Run();
490
491 pending_operations_.pop_front();
492 delete operation;
493 StartNextOperation();
494 }
495
496 void OwnerSettingsService::HandleError(DeviceSettingsService::Status status,
497 const base::Closure& callback) {
498 LOG(ERROR) << "Session manager operation failed: " << status;
499 GetDeviceSettingsService()->OnSignAndStoreOperationCompleted(status);
500 if (!callback.is_null())
501 callback.Run();
502 }
503
504 scoped_refptr<OwnerKeyUtil> OwnerSettingsService::GetOwnerKeyUtil() {
505 DCHECK(thread_checker_.CalledOnValidThread());
506 return owner_key_util_;
507 }
508
509 DeviceSettingsService* OwnerSettingsService::GetDeviceSettingsService() {
510 DCHECK(thread_checker_.CalledOnValidThread());
511 if (g_device_settings_service_for_testing)
512 return g_device_settings_service_for_testing;
513 if (DeviceSettingsService::IsInitialized())
514 return DeviceSettingsService::Get();
515 return NULL;
516 }
517
518 } // namespace chromeos
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