[ios] Refactor reauthentication module for re-use

Move from /ios/chrome/browser/settings/ui/password
to /ios/chrome/common/reauthenticaton

Moved metrics out of it and into (non test) callers.
Changed result from BOOL to 3 states enum for success,
failure and skipped.

The goal is to be able to use it in the credential extension.

Bug: 1045455
Change-Id: I94104044c82b637b9d183f07fc6d8ce291e5b7a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2089864
Commit-Queue: David Jean <djean@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748269}

ios/chrome/browser/ui/settings/BUILD.gn

@@ -189,7 +189,6 @@ source_set("settings") {
   allow_circular_includes_from = [ "//ios/chrome/browser/ui/authentication" ]
   libs = [
     "CoreLocation.framework",
-    "LocalAuthentication.framework",
     "UIKit.framework",
   ]
 }

ios/chrome/browser/ui/settings/password/BUILD.gn

@@ -12,9 +12,6 @@ source_set("password") {
     "password_exporter.mm",
     "passwords_table_view_controller.h",
     "passwords_table_view_controller.mm",
-    "reauthentication_module.h",
-    "reauthentication_module.mm",
-    "reauthentication_protocol.h",
   ]
   deps = [
     ":password_constants",
@@ -44,6 +41,7 @@ source_set("password") {
     "//ios/chrome/browser/ui/table_view/cells:cells_constants",
     "//ios/chrome/browser/ui/util",
     "//ios/chrome/common/ui/colors",
+    "//ios/chrome/common/ui/reauthentication",
     "//ios/chrome/common/ui/util",
     "//ios/third_party/material_components_ios",
     "//ui/base",
@@ -66,7 +64,6 @@ source_set("test_support") {
   sources = [
     "password_details_table_view_controller+testing.h",
     "password_exporter_for_testing.h",
-    "reauthentication_module_for_testing.h",
   ]
   deps = [ ":password" ]
 }
@@ -78,7 +75,6 @@ source_set("unit_tests") {
     "password_details_table_view_controller_unittest.mm",
     "password_exporter_unittest.mm",
     "passwords_table_view_controller_unittest.mm",
-    "reauthentication_module_unittest.mm",
   ]
   deps = [
     ":password",
@@ -100,6 +96,7 @@ source_set("unit_tests") {
     "//ios/chrome/browser/ui/util",
     "//ios/chrome/browser/web:test_support",
     "//ios/chrome/common/ui/colors",
+    "//ios/chrome/common/ui/reauthentication",
     "//ios/chrome/test/app:test_support",
     "//ios/web/public/test",
     "//ios/web/public/test",
@@ -131,6 +128,7 @@ source_set("eg_test_support") {
     "//components/prefs",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/passwords",
+    "//ios/chrome/common/ui/reauthentication",
     "//ios/chrome/test/app:test_support",
     "//ios/third_party/material_components_ios",
     "//url",
@@ -156,6 +154,7 @@ source_set("eg_tests") {
     "//ios/chrome/browser/ui/table_view/cells",
     "//ios/chrome/browser/ui/table_view/cells:cells_constants",
     "//ios/chrome/browser/ui/util",
+    "//ios/chrome/common/ui/reauthentication",
     "//ios/chrome/test/earl_grey:test_support",
     "//ios/testing/earl_grey:earl_grey_support",
     "//ios/third_party/material_components_ios",
@@ -192,6 +191,7 @@ source_set("eg_app_support+eg2") {
     "//ios/chrome/app/strings:ios_strings_grit",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/passwords",
+    "//ios/chrome/common/ui/reauthentication",
     "//ios/chrome/test/app:test_support",
     "//ios/testing/earl_grey:eg_app_support+eg2",
     "//ios/third_party/material_components_ios",
@@ -208,6 +208,8 @@ source_set("eg_test_support+eg2") {
   testonly = true
 
   sources = [ "passwords_settings_app_interface.h" ]
+
+  deps = [ "//ios/chrome/common/ui/reauthentication" ]
 }
 
 source_set("eg2_tests") {
@@ -228,6 +230,7 @@ source_set("eg2_tests") {
     "//ios/chrome/browser/ui/settings:settings_root_constants",
     "//ios/chrome/browser/ui/table_view/cells:cells_constants",
     "//ios/chrome/browser/ui/util",
+    "//ios/chrome/common/ui/reauthentication",
     "//ios/chrome/test/earl_grey:eg_test_support+eg2",
     "//ios/testing/earl_grey:eg_test_support+eg2",
     "//ios/third_party/earl_grey2:test_lib",

ios/chrome/browser/ui/settings/password/password_details_table_view_controller.mm

@@ -19,7 +19,6 @@
 #import "ios/chrome/browser/ui/commands/browser_commands.h"
 #import "ios/chrome/browser/ui/settings/password/passwords_table_view_constants.h"
 #import "ios/chrome/browser/ui/settings/password/passwords_table_view_controller.h"
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module.h"
 #import "ios/chrome/browser/ui/settings/utils/settings_utils.h"
 #import "ios/chrome/browser/ui/table_view/cells/table_view_cells_constants.h"
 #import "ios/chrome/browser/ui/table_view/cells/table_view_detail_text_item.h"
@@ -28,6 +27,7 @@
 #include "ios/chrome/browser/ui/ui_feature_flags.h"
 #include "ios/chrome/browser/ui/util/uikit_ui_util.h"
 #import "ios/chrome/common/ui/colors/semantic_color_names.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/third_party/material_components_ios/src/components/Snackbar/src/MaterialSnackbar.h"
 #include "ui/base/l10n/l10n_util_mac.h"
@@ -36,6 +36,9 @@
 #error "This file requires ARC support."
 #endif
 
+using password_manager::metrics_util::LogPasswordSettingsReauthResult;
+using password_manager::metrics_util::ReauthResult;
+
 namespace {
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
@@ -345,9 +348,13 @@ typedef NS_ENUM(NSInteger, ItemType) {
 
   if ([_weakReauthenticationModule canAttemptReauth]) {
     __weak PasswordDetailsTableViewController* weakSelf = self;
-    void (^showPasswordHandler)(BOOL) = ^(BOOL success) {
+    void (^showPasswordHandler)(ReauthenticationResult) = ^(
+        ReauthenticationResult result) {
       PasswordDetailsTableViewController* strongSelf = weakSelf;
-      if (!strongSelf || !success)
+      if (!strongSelf)
+        return;
+      [strongSelf logPasswordSettingsReauthResult:result];
+      if (result == ReauthenticationResult::kFailure)
         return;
       TableViewTextItem* passwordItem = strongSelf->_passwordItem;
       passwordItem.masked = NO;
@@ -401,11 +408,13 @@ typedef NS_ENUM(NSInteger, ItemType) {
         password_manager::metrics_util::ReauthResult::kSkipped);
   } else if ([_weakReauthenticationModule canAttemptReauth]) {
     __weak PasswordDetailsTableViewController* weakSelf = self;
-    void (^copyPasswordHandler)(BOOL) = ^(BOOL success) {
+    void (^copyPasswordHandler)(ReauthenticationResult) = ^(
+        ReauthenticationResult result) {
       PasswordDetailsTableViewController* strongSelf = weakSelf;
       if (!strongSelf)
         return;
-      if (success) {
+      [strongSelf logPasswordSettingsReauthResult:result];
+      if (result != ReauthenticationResult::kFailure) {
         UIPasteboard* generalPasteboard = [UIPasteboard generalPasteboard];
         generalPasteboard.string = strongSelf->_password;
         [strongSelf showToast:l10n_util::GetNSString(
@@ -619,6 +628,24 @@ typedef NS_ENUM(NSInteger, ItemType) {
   [tableView deselectRowAtIndexPath:indexPath animated:YES];
 }
 
+#pragma mark - Metrics
+
+// Logs metrics for the given reauthentication result (success, failure or
+// skipped).
+- (void)logPasswordSettingsReauthResult:(ReauthenticationResult)result {
+  switch (result) {
+    case ReauthenticationResult::kSuccess:
+      LogPasswordSettingsReauthResult(ReauthResult::kSuccess);
+      break;
+    case ReauthenticationResult::kFailure:
+      LogPasswordSettingsReauthResult(ReauthResult::kFailure);
+      break;
+    case ReauthenticationResult::kSkipped:
+      LogPasswordSettingsReauthResult(ReauthResult::kSkipped);
+      break;
+  }
+}
+
 #pragma mark - ForTesting
 
 - (void)setReauthenticationModule:

ios/chrome/browser/ui/settings/password/password_details_table_view_controller_unittest.mm

@@ -7,10 +7,10 @@
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/autofill/core/common/password_form.h"
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module.h"
 #import "ios/chrome/browser/ui/table_view/cells/table_view_text_item.h"
 #import "ios/chrome/browser/ui/table_view/chrome_table_view_controller_test.h"
 #import "ios/chrome/browser/web/chrome_web_test.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/chrome/test/app/password_test_util.h"
 #include "ios/web/public/test/web_task_environment.h"
@@ -61,7 +61,7 @@ class PasswordDetailsTableViewControllerTest
   void SetUp() override {
     ChromeTableViewControllerTest::SetUp();
     reauthentication_module_ = [[MockReauthenticationModule alloc] init];
-    reauthentication_module_.shouldSucceed = YES;
+    reauthentication_module_.expectedResult = ReauthenticationResult::kSuccess;
   }
 
   ChromeTableViewController* InstantiateController() override {

ios/chrome/browser/ui/settings/password/password_exporter.mm

@@ -18,7 +18,7 @@
 #include "components/password_manager/core/browser/password_manager_metrics_util.h"
 #include "components/password_manager/core/common/passwords_directory_util_ios.h"
 #include "components/strings/grit/components_strings.h"
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
@@ -26,6 +26,9 @@
 #error "This file requires ARC support."
 #endif
 
+using password_manager::metrics_util::LogPasswordSettingsReauthResult;
+using password_manager::metrics_util::ReauthResult;
+
 namespace {
 
 enum class ReauthenticationStatus {
@@ -206,18 +209,23 @@ enum class ReauthenticationStatus {
 - (void)startReauthentication {
   __weak PasswordExporter* weakSelf = self;
 
-  void (^onReauthenticationFinished)(BOOL) = ^(BOOL success) {
-    PasswordExporter* strongSelf = weakSelf;
-    if (!strongSelf)
-      return;
-    if (success) {
-      strongSelf.reauthenticationStatus = ReauthenticationStatus::SUCCESSFUL;
-      [strongSelf showPreparingPasswordsAlert];
-    } else {
-      strongSelf.reauthenticationStatus = ReauthenticationStatus::FAILED;
-    }
-    [strongSelf tryExporting];
-  };
+  void (^onReauthenticationFinished)(ReauthenticationResult) =
+      ^(ReauthenticationResult result) {
+        DCHECK(result != ReauthenticationResult::kSkipped);
+        PasswordExporter* strongSelf = weakSelf;
+        if (!strongSelf)
+          return;
+        if (result == ReauthenticationResult::kSuccess) {
+          LogPasswordSettingsReauthResult(ReauthResult::kSuccess);
+          strongSelf.reauthenticationStatus =
+              ReauthenticationStatus::SUCCESSFUL;
+          [strongSelf showPreparingPasswordsAlert];
+        } else {
+          LogPasswordSettingsReauthResult(ReauthResult::kFailure);
+          strongSelf.reauthenticationStatus = ReauthenticationStatus::FAILED;
+        }
+        [strongSelf tryExporting];
+      };
 
   [_weakReauthenticationModule
       attemptReauthWithLocalizedReason:l10n_util::GetNSString(

ios/chrome/browser/ui/settings/password/password_exporter_unittest.mm

@@ -127,7 +127,8 @@ class PasswordExporterTest : public PlatformTest {
 // Tests that when reauthentication is successful, writing the passwords file
 // is attempted and a call to show the activity view is made.
 TEST_F(PasswordExporterTest, PasswordFileWriteReauthSucceeded) {
-  mock_reauthentication_module_.shouldSucceed = YES;
+  mock_reauthentication_module_.expectedResult =
+      ReauthenticationResult::kSuccess;
   FakePasswordFileWriter* fake_password_file_writer =
       [[FakePasswordFileWriter alloc] init];
   fake_password_file_writer.writingStatus = WriteToURLStatus::SUCCESS;
@@ -154,7 +155,8 @@ TEST_F(PasswordExporterTest, PasswordFileWriteReauthSucceeded) {
 // the appropriate error is displayed and the export operation
 // is interrupted.
 TEST_F(PasswordExporterTest, WritingFailedOutOfDiskSpace) {
-  mock_reauthentication_module_.shouldSucceed = YES;
+  mock_reauthentication_module_.expectedResult =
+      ReauthenticationResult::kSuccess;
   FakePasswordFileWriter* fake_password_file_writer =
       [[FakePasswordFileWriter alloc] init];
   fake_password_file_writer.writingStatus =
@@ -192,7 +194,8 @@ TEST_F(PasswordExporterTest, WritingFailedOutOfDiskSpace) {
 // enough disk space, the appropriate error is displayed and the export
 // operation is interrupted.
 TEST_F(PasswordExporterTest, WritingFailedUnknownError) {
-  mock_reauthentication_module_.shouldSucceed = YES;
+  mock_reauthentication_module_.expectedResult =
+      ReauthenticationResult::kSuccess;
   FakePasswordFileWriter* fake_password_file_writer =
       [[FakePasswordFileWriter alloc] init];
   fake_password_file_writer.writingStatus = WriteToURLStatus::UNKNOWN_ERROR;
@@ -227,7 +230,8 @@ TEST_F(PasswordExporterTest, WritingFailedUnknownError) {
 
 // Tests that when reauthentication fails the export flow is interrupted.
 TEST_F(PasswordExporterTest, ExportInterruptedWhenReauthFails) {
-  mock_reauthentication_module_.shouldSucceed = NO;
+  mock_reauthentication_module_.expectedResult =
+      ReauthenticationResult::kFailure;
   FakePasswordSerialzerBridge* fake_password_serializer_bridge =
       [[FakePasswordSerialzerBridge alloc] init];
   [password_exporter_
@@ -272,7 +276,8 @@ TEST_F(PasswordExporterTest, ExportInterruptedWhenReauthFails) {
 // Tests that cancelling the export while serialization is still ongoing
 // waits for it to finish before cleaning up.
 TEST_F(PasswordExporterTest, CancelWaitsForSerializationFinished) {
-  mock_reauthentication_module_.shouldSucceed = YES;
+  mock_reauthentication_module_.expectedResult =
+      ReauthenticationResult::kSuccess;
   FakePasswordSerialzerBridge* fake_password_serializer_bridge =
       [[FakePasswordSerialzerBridge alloc] init];
   [password_exporter_
@@ -309,7 +314,8 @@ TEST_F(PasswordExporterTest, CancelWaitsForSerializationFinished) {
 // Tests that if the export is cancelled before writing to file finishes
 // successfully the request to show the activity controller isn't made.
 TEST_F(PasswordExporterTest, CancelledBeforeWriteToFileFinishesSuccessfully) {
-  mock_reauthentication_module_.shouldSucceed = YES;
+  mock_reauthentication_module_.expectedResult =
+      ReauthenticationResult::kSuccess;
   FakePasswordFileWriter* fake_password_file_writer =
       [[FakePasswordFileWriter alloc] init];
   fake_password_file_writer.writingStatus = WriteToURLStatus::SUCCESS;
@@ -341,7 +347,8 @@ TEST_F(PasswordExporterTest, CancelledBeforeWriteToFileFinishesSuccessfully) {
 // Tests that if the export is cancelled before writing to file fails
 // with an error, the request to show the error alert isn't made.
 TEST_F(PasswordExporterTest, CancelledBeforeWriteToFileFails) {
-  mock_reauthentication_module_.shouldSucceed = YES;
+  mock_reauthentication_module_.expectedResult =
+      ReauthenticationResult::kSuccess;
   FakePasswordFileWriter* fake_password_file_writer =
       [[FakePasswordFileWriter alloc] init];
   fake_password_file_writer.writingStatus = WriteToURLStatus::UNKNOWN_ERROR;

ios/chrome/browser/ui/settings/password/passwords_settings_app_interface.h

@@ -7,6 +7,8 @@
 
 #import <UIKit/UIKit.h>
 
+#import "ios/chrome/common/ui/reauthentication/reauthentication_protocol.h"
+
 // EarlGreyScopedBlockSwizzlerAppInterface contains the app-side
 // implementation for helpers. These helpers are compiled into
 // the app binary and can be called from either app or test code.
@@ -16,7 +18,8 @@
 // view password) and its options for next test.
 + (void)setUpMockReauthenticationModule;
 + (void)setUpMockReauthenticationModuleForExport;
-+ (void)mockReauthenticationModuleShouldSucceed:(BOOL)shouldSucceed;
++ (void)mockReauthenticationModuleExpectedResult:
+    (ReauthenticationResult)expectedResult;
 + (void)mockReauthenticationModuleCanAttempt:(BOOL)canAttempt;
 
 // Dismisses snack bar.  Used before next test.

ios/chrome/browser/ui/settings/password/passwords_settings_app_interface.mm

@@ -151,8 +151,9 @@ static MockReauthenticationModule* _mockReauthenticationModule;
       SetUpAndReturnMockReauthenticationModuleForExport();
 }
 
-+ (void)mockReauthenticationModuleShouldSucceed:(BOOL)shouldSucceed {
-  _mockReauthenticationModule.shouldSucceed = shouldSucceed;
++ (void)mockReauthenticationModuleExpectedResult:
+    (ReauthenticationResult)expectedResult {
+  _mockReauthenticationModule.expectedResult = expectedResult;
 }
 
 + (void)mockReauthenticationModuleCanAttempt:(BOOL)canAttempt {

ios/chrome/browser/ui/settings/password/passwords_settings_egtest.mm

@@ -14,6 +14,7 @@
 #import "ios/chrome/browser/ui/settings/password/passwords_table_view_constants.h"
 #import "ios/chrome/browser/ui/settings/settings_root_table_constants.h"
 #import "ios/chrome/browser/ui/table_view/cells/table_view_cells_constants.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_protocol.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/earl_grey/chrome_actions.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
@@ -406,7 +407,8 @@ void TapEdit() {
       performAction:grey_tap()];
 
   [PasswordSettingsAppInterface setUpMockReauthenticationModule];
-  [PasswordSettingsAppInterface mockReauthenticationModuleShouldSucceed:YES];
+  [PasswordSettingsAppInterface mockReauthenticationModuleExpectedResult:
+                                    ReauthenticationResult::kSuccess];
 
   // Check the snackbar in case of successful reauthentication.
   [GetInteractionForPasswordDetailItem(CopyPasswordButton())
@@ -419,7 +421,8 @@ void TapEdit() {
       performAction:grey_tap()];
 
   // Check the snackbar in case of failed reauthentication.
-  [PasswordSettingsAppInterface mockReauthenticationModuleShouldSucceed:NO];
+  [PasswordSettingsAppInterface mockReauthenticationModuleExpectedResult:
+                                    ReauthenticationResult::kFailure];
   [GetInteractionForPasswordDetailItem(CopyPasswordButton())
       performAction:grey_tap()];
 
@@ -449,7 +452,8 @@ void TapEdit() {
       performAction:grey_tap()];
 
   [PasswordSettingsAppInterface setUpMockReauthenticationModule];
-  [PasswordSettingsAppInterface mockReauthenticationModuleShouldSucceed:YES];
+  [PasswordSettingsAppInterface mockReauthenticationModuleExpectedResult:
+                                    ReauthenticationResult::kSuccess];
 
   // Check the snackbar in case of successful reauthentication.
   [GetInteractionForPasswordDetailItem(ShowPasswordButton())
@@ -480,7 +484,8 @@ void TapEdit() {
       performAction:grey_tap()];
 
   [PasswordSettingsAppInterface setUpMockReauthenticationModule];
-  [PasswordSettingsAppInterface mockReauthenticationModuleShouldSucceed:NO];
+  [PasswordSettingsAppInterface mockReauthenticationModuleExpectedResult:
+                                    ReauthenticationResult::kFailure];
 
   // Check the snackbar in case of failed reauthentication.
   [GetInteractionForPasswordDetailItem(ShowPasswordButton())
@@ -882,7 +887,8 @@ void TapEdit() {
   // end of the test, otherwise it might get deleted too soon and break the
   // functionality of copying and viewing passwords.
   [PasswordSettingsAppInterface setUpMockReauthenticationModule];
-  [PasswordSettingsAppInterface mockReauthenticationModuleShouldSucceed:YES];
+  [PasswordSettingsAppInterface mockReauthenticationModuleExpectedResult:
+                                    ReauthenticationResult::kSuccess];
 
   // Tap the context menu item for copying.
   [[EarlGrey
@@ -924,7 +930,8 @@ void TapEdit() {
   // end of the test, otherwise it might get deleted too soon and break the
   // functionality of copying and viewing passwords.
   [PasswordSettingsAppInterface setUpMockReauthenticationModule];
-  [PasswordSettingsAppInterface mockReauthenticationModuleShouldSucceed:YES];
+  [PasswordSettingsAppInterface mockReauthenticationModuleExpectedResult:
+                                    ReauthenticationResult::kSuccess];
 
   // Tap the context menu item for showing.
   [[EarlGrey
@@ -1400,7 +1407,8 @@ void TapEdit() {
   OpenPasswordSettings();
 
   [PasswordSettingsAppInterface setUpMockReauthenticationModuleForExport];
-  [PasswordSettingsAppInterface mockReauthenticationModuleShouldSucceed:YES];
+  [PasswordSettingsAppInterface mockReauthenticationModuleExpectedResult:
+                                    ReauthenticationResult::kSuccess];
 
   [[EarlGrey
       selectElementWithMatcher:chrome_test_util::ButtonWithAccessibilityLabelId(

ios/chrome/browser/ui/settings/password/passwords_table_view_controller.mm

@@ -41,7 +41,6 @@
 #import "ios/chrome/browser/ui/settings/password/password_details_table_view_controller_delegate.h"
 #import "ios/chrome/browser/ui/settings/password/password_exporter.h"
 #import "ios/chrome/browser/ui/settings/password/passwords_table_view_constants.h"
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module.h"
 #import "ios/chrome/browser/ui/settings/utils/pref_backed_boolean.h"
 #import "ios/chrome/browser/ui/settings/utils/settings_utils.h"
 #import "ios/chrome/browser/ui/table_view/cells/table_view_cells_constants.h"
@@ -55,6 +54,7 @@
 #import "ios/chrome/browser/ui/util/uikit_ui_util.h"
 #import "ios/chrome/common/ui/colors/UIColor+cr_semantic_colors.h"
 #import "ios/chrome/common/ui/colors/semantic_color_names.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module.h"
 #import "ios/chrome/common/ui/util/constraints_ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ui/base/l10n/l10n_util_mac.h"

ios/chrome/common/ui/reauthentication/BUILD.gn

+# Copyright 2020 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.
+
+source_set("reauthentication") {
+  configs += [ "//build/config/compiler:enable_arc" ]
+  sources = [
+    "reauthentication_module.h",
+    "reauthentication_module.mm",
+    "reauthentication_protocol.h",
+  ]
+  deps = [ "//base" ]
+  frameworks = [ "LocalAuthentication.framework" ]
+}
+
+source_set("test_support") {
+  configs += [ "//build/config/compiler:enable_arc" ]
+  testonly = true
+  sources = [ "reauthentication_module_for_testing.h" ]
+  deps = [ ":reauthentication" ]
+}
+
+source_set("unit_tests") {
+  configs += [ "//build/config/compiler:enable_arc" ]
+  testonly = true
+  sources = [ "reauthentication_module_unittest.mm" ]
+  deps = [
+    ":reauthentication",
+    ":test_support",
+    "//base",
+    "//base/test:test_support",
+    "//testing/gmock",
+    "//testing/gtest",
+    "//testing/gtest",
+    "//third_party/ocmock",
+  ]
+}

ios/chrome/browser/ui/settings/password/reauthentication_module.h → ios/chrome/common/ui/reauthentication/reauthentication_module.h

@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_MODULE_H_
-#define IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_MODULE_H_
+#ifndef IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_MODULE_H_
+#define IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_MODULE_H_
 
 #import <Foundation/Foundation.h>
 
-#import "ios/chrome/browser/ui/settings/password/reauthentication_protocol.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_protocol.h"
 
 // A help article on how to set up a passcode.
 extern const char kPasscodeArticleURL[];
@@ -39,4 +39,4 @@ extern const char kPasscodeArticleURL[];
 
 @end
 
-#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_MODULE_H_
+#endif  // IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_MODULE_H_

ios/chrome/browser/ui/settings/password/reauthentication_module.mm → ios/chrome/common/ui/reauthentication/reauthentication_module.mm

 // Copyright 2015 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.
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module.h"
 
 #import <LocalAuthentication/LocalAuthentication.h>
 
-#include "base/logging.h"
-#include "base/metrics/histogram_macros.h"
-#include "components/password_manager/core/browser/password_manager_metrics_util.h"
+#import "base/logging.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ -15,9 +13,6 @@
 
 constexpr char kPasscodeArticleURL[] = "https://support.apple.com/HT204060";
 
-using password_manager::metrics_util::LogPasswordSettingsReauthResult;
-using password_manager::metrics_util::ReauthResult;
-
 @implementation ReauthenticationModule {
   // Block that creates a new |LAContext| object everytime one is required,
   // meant to make testing with a mock object possible.
@@ -51,10 +46,11 @@ using password_manager::metrics_util::ReauthResult;
 
 - (void)attemptReauthWithLocalizedReason:(NSString*)localizedReason
                     canReusePreviousAuth:(BOOL)canReusePreviousAuth
-                                 handler:(void (^)(BOOL success))handler {
+                                 handler:
+                                     (void (^)(ReauthenticationResult success))
+                                         handler {
   if (canReusePreviousAuth && [self isPreviousAuthValid]) {
-    handler(YES);
-    LogPasswordSettingsReauthResult(ReauthResult::kSkipped);
+    handler(ReauthenticationResult::kSkipped);
     return;
   }
 
@@ -69,10 +65,8 @@ using password_manager::metrics_util::ReauthResult;
       if (success) {
         [strongSelf->_successfulReauthTimeAccessor updateSuccessfulReauthTime];
       }
-      handler(success);
-
-      LogPasswordSettingsReauthResult(success ? ReauthResult::kSuccess
-                                              : ReauthResult::kFailure);
+      handler(success ? ReauthenticationResult::kSuccess
+                      : ReauthenticationResult::kFailure);
     });
   };
 

ios/chrome/browser/ui/settings/password/reauthentication_module_for_testing.h → ios/chrome/common/ui/reauthentication/reauthentication_module_for_testing.h

@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_MODULE_FOR_TESTING_H_
-#define IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_MODULE_FOR_TESTING_H_
+#ifndef IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_MODULE_FOR_TESTING_H_
+#define IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_MODULE_FOR_TESTING_H_
 
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module.h"
 
 #import <LocalAuthentication/LocalAuthentication.h>
 
@@ -17,4 +17,4 @@
 
 @end
 
-#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_MODULE_FOR_TESTING_H
+#endif  // IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_MODULE_FOR_TESTING_H_

ios/chrome/browser/ui/settings/password/reauthentication_module_unittest.mm → ios/chrome/common/ui/reauthentication/reauthentication_module_unittest.mm

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module_for_testing.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module_for_testing.h"
 
 #import <LocalAuthentication/LocalAuthentication.h>
 
@@ -79,10 +79,11 @@ TEST_F(ReauthenticationModuleTest, ReauthReuseNotPermitted) {
   OCMExpect([auth_context_ evaluatePolicy:LAPolicyDeviceOwnerAuthentication
                           localizedReason:[OCMArg any]
                                     reply:[OCMArg any]]);
-  [reauthentication_module_ attemptReauthWithLocalizedReason:@"Test"
-                                        canReusePreviousAuth:NO
-                                                     handler:^(BOOL success){
-                                                     }];
+  [reauthentication_module_
+      attemptReauthWithLocalizedReason:@"Test"
+                  canReusePreviousAuth:NO
+                               handler:^(ReauthenticationResult success){
+                               }];
 
   EXPECT_OCMOCK_VERIFY(auth_context_);
 }
@@ -106,10 +107,11 @@ TEST_F(ReauthenticationModuleTest, ReauthReusePermittedLessThanSixtySeconds) {
 
   // Use @try/@catch as -reject raises an exception.
   @try {
-    [reauthentication_module_ attemptReauthWithLocalizedReason:@"Test"
-                                          canReusePreviousAuth:YES
-                                                       handler:^(BOOL success){
-                                                       }];
+    [reauthentication_module_
+        attemptReauthWithLocalizedReason:@"Test"
+                    canReusePreviousAuth:YES
+                                 handler:^(ReauthenticationResult success){
+                                 }];
     EXPECT_OCMOCK_VERIFY(auth_context_);
   } @catch (NSException* exception) {
     // The exception is raised when
@@ -136,10 +138,11 @@ TEST_F(ReauthenticationModuleTest, ReauthReusePermittedMoreThanSixtySeconds) {
   OCMExpect([auth_context_ evaluatePolicy:LAPolicyDeviceOwnerAuthentication
                           localizedReason:[OCMArg any]
                                     reply:[OCMArg any]]);
-  [reauthentication_module_ attemptReauthWithLocalizedReason:@"Test"
-                                        canReusePreviousAuth:YES
-                                                     handler:^(BOOL success){
-                                                     }];
+  [reauthentication_module_
+      attemptReauthWithLocalizedReason:@"Test"
+                  canReusePreviousAuth:YES
+                               handler:^(ReauthenticationResult success){
+                               }];
 
   EXPECT_OCMOCK_VERIFY(auth_context_);
 }

ios/chrome/browser/ui/settings/password/reauthentication_protocol.h → ios/chrome/common/ui/reauthentication/reauthentication_protocol.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
+// Copyright 2020 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.
 
-#ifndef IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_PROTOCOL_H_
-#define IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_PROTOCOL_H_
+#ifndef IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_PROTOCOL_H_
+#define IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_PROTOCOL_H_
 
 #import <Foundation/Foundation.h>
 
+// Indicates the result of the Reauthentication attempt.
+enum class ReauthenticationResult {
+  kSuccess = 0,
+  kFailure = 1,
+  kSkipped = 2,
+  kMaxValue = kSkipped,
+};
+
+// Protocol for implementor of hardware reauthentication check.
 @protocol ReauthenticationProtocol <NSObject>
 
 // Checks whether Touch ID and/or passcode is enabled for the device.
 - (BOOL)canAttemptReauth;
 
-// Attempts to reauthenticate the user with Touch ID or passcode if Touch ID is
-// not available. If |canReusePreviousAuth| is YES, a previous successful
-// reauthentication can be taken into consideration, otherwise a new
+// Attempts to reauthenticate the user with Touch ID or Face ID, or passcode if
+// such hardware is not available. If |canReusePreviousAuth| is YES, a previous
+// successful reauthentication can be taken into consideration, otherwise a new
 // reauth attempt must be made. |handler| will take action depending on the
 // result of the reauth attempt.
 - (void)attemptReauthWithLocalizedReason:(NSString*)localizedReason
                     canReusePreviousAuth:(BOOL)canReusePreviousAuth
-                                 handler:(void (^)(BOOL success))handler;
+                                 handler:
+                                     (void (^)(ReauthenticationResult success))
+                                         handler;
 
 @end
 
-#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_REAUTHENTICATION_PROTOCOL_H_
+#endif  // IOS_CHROME_COMMON_UI_REAUTHENTICATION_REAUTHENTICATION_PROTOCOL_H_

ios/chrome/test/BUILD.gn

@@ -313,6 +313,7 @@ test("ios_chrome_unittests") {
     "//ios/chrome/browser/web_state_list/web_usage_enabler:unit_tests",
     "//ios/chrome/browser/webui:unit_tests",
     "//ios/chrome/common:unit_tests",
+    "//ios/chrome/common/ui/reauthentication:unit_tests",
     "//ios/chrome/common/ui/util:unit_tests",
     "//ios/chrome/content_widget_extension:unit_tests",
     "//ios/chrome/search_widget_extension:unit_tests",

ios/chrome/test/app/BUILD.gn

@@ -82,6 +82,7 @@ source_set("test_support") {
     "//ios/chrome/browser/url_loading",
     "//ios/chrome/browser/web_state_list",
     "//ios/chrome/browser/web_state_list/web_usage_enabler",
+    "//ios/chrome/common/ui/reauthentication",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/signin:fake_chrome_identity",
     "//ios/public/provider/chrome/browser/signin:test_support",

ios/chrome/test/app/password_test_util.h

@@ -5,7 +5,7 @@
 #ifndef IOS_CHROME_TEST_APP_PASSWORD_TEST_UTIL_H_
 #define IOS_CHROME_TEST_APP_PASSWORD_TEST_UTIL_H_
 
-#import "ios/chrome/browser/ui/settings/password/reauthentication_module.h"
+#import "ios/chrome/common/ui/reauthentication/reauthentication_module.h"
 
 @interface MockReauthenticationModule : NSObject<ReauthenticationProtocol>
 
@@ -17,7 +17,7 @@
 
 // Indicates whether (mock) authentication should succeed or not. Setting
 // |shouldSucceed| to any value sets |canAttempt| to YES.
-@property(nonatomic, assign) BOOL shouldSucceed;
+@property(nonatomic, assign) ReauthenticationResult expectedResult;
 
 @end
 

ios/chrome/test/app/password_test_util.mm

@@ -18,12 +18,12 @@
 
 @synthesize localizedReasonForAuthentication =
     _localizedReasonForAuthentication;
-@synthesize shouldSucceed = _shouldSucceed;
+@synthesize expectedResult = _expectedResult;
 @synthesize canAttempt = _canAttempt;
 
-- (void)setShouldSucceed:(BOOL)shouldSucceed {
+- (void)setExpectedResult:(ReauthenticationResult)expectedResult {
   _canAttempt = YES;
-  _shouldSucceed = shouldSucceed;
+  _expectedResult = expectedResult;
 }
 
 - (BOOL)canAttemptReauth {
@@ -32,10 +32,11 @@
 
 - (void)attemptReauthWithLocalizedReason:(NSString*)localizedReason
                     canReusePreviousAuth:(BOOL)canReusePreviousAuth
-                                 handler:(void (^)(BOOL success))
-                                             showCopyPasswordsHandler {
+                                 handler:
+                                     (void (^)(ReauthenticationResult success))
+                                         showCopyPasswordsHandler {
   self.localizedReasonForAuthentication = localizedReason;
-  showCopyPasswordsHandler(_shouldSucceed);
+  showCopyPasswordsHandler(_expectedResult);
 }
 
 @end