Easy Sign-in: Use TPM RSA key to sign nonce in sign-in protocol

chrome/browser/signin/easy_unlock_service_regular.cc

 // Copyright 2014 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/signin/easy_unlock_service_regular.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
@@ skipping 148 matching lines @@
                                       prefs::kEasyUnlockPairing);
   pairing_update->SetWithoutPathExpansion(kKeyDevices, devices.DeepCopy());
 
 #if defined(OS_CHROMEOS)
   // TODO(tengs): Investigate if we can determine if the remote devices were set
   // from sync or from the setup app.
   if (short_lived_user_context_ && short_lived_user_context_->user_context() &&
       !devices.empty()) {
     // We may already have the password cached, so proceed to create the
     // cryptohome keys for sign-in or the system will be hardlocked.
-    chromeos::UserContext* user_context =
-        short_lived_user_context_->user_context();
-    chromeos::EasyUnlockKeyManager* key_manager =
-        chromeos::UserSessionManager::GetInstance()->GetEasyUnlockKeyManager();
-
-    key_manager->RefreshKeys(
-        *user_context, devices,
-        base::Bind(&EasyUnlockServiceRegular::OnKeysRefreshedForSetDevices,
-                   weak_ptr_factory_.GetWeakPtr()));
+    chromeos::UserSessionManager::GetInstance()->GetEasyUnlockKeyManager()
+        ->RefreshKeys(
+            *short_lived_user_context_->user_context(),
+            devices,
+            base::Bind(&EasyUnlockServiceRegular::OnKeysRefreshedForSetDevices,
+                       weak_ptr_factory_.GetWeakPtr()));
   } else {
     CheckCryptohomeKeysAndMaybeHardlock();
   }
 #else
   CheckCryptohomeKeysAndMaybeHardlock();
 #endif
 }
 
 void EasyUnlockServiceRegular::ClearRemoteDevices() {
   DictionaryPrefUpdate pairing_update(profile()->GetPrefs(),
@@ skipping 114 matching lines @@
 
   if (!success) {
     SetTurnOffFlowStatus(FAIL);
     return;
   }
 
   ClearRemoteDevices();
   SetTurnOffFlowStatus(IDLE);
   ReloadApp();
 }