[iOS] Handle app launch for credential exchange import

On high-level this CL adds handling Bling being launched by the OS to
perform import in the credential exchange flow (triggered by exporting
the data in a different credential manager app).

More important highlights:
* Adds new user activity handling in user_activity_browser_agent for the ASCredentialExchangeActivity type, protected by a compile time flag
* Extracts UUID from the user activity, which is a token passed by the OS and required to access the credential data
* Adds new command for handling the start of the import flow
* Adds a skeleton of coordinator / mediator which will be responsible for faciliting the import flow (view controller will be added later)
* Adds new Swift class responsible for communicating with the OS import API (available only in Swift)
* Adds skeleton of a credential importer class, responsible for owning the Swift class and in later patches - for translating the received Swift data into C++ structs used by storage layer

For now, the code only handles the app being launched and passing the
received UUID all the way to the Swift class, which in turn uses it to
access credential data. Importing the data will be implemented in the
follow-up patches.

Bug: 444111277
Change-Id: Ic37a1562cce73ed17e9b2d74da77a5e206eaf540
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6938606
Reviewed-by: Mark Cogan <[email protected]>
Commit-Queue: Rafał Godlewski <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1516450}

Author: Rafał Godlewski

ios/chrome/app/app_startup_parameters.h

@@ -49,6 +49,7 @@ enum TabOpeningPostOpeningAction {
   ADD_READING_LIST_ITEMS,
   EXTERNAL_ACTION_SHOW_BROWSER_SETTINGS,
   START_LENS_FROM_SHARE_EXTENSION,
+  CREDENTIAL_EXCHANGE_IMPORT,
 };
 
 // Represents the status of a request to change the application mode.
@@ -100,6 +101,9 @@ class GURL;
 @property(nonatomic, readwrite, copy) NSString* textQuery;
 // Data for UIImage for image query that should be executed on startup.
 @property(nonatomic, readwrite, strong) NSData* imageSearchData;
+// Token received from the OS during the app launch for the credential exchange
+// import, needed to be passed back to the OS to receive the credential data.
+@property(nonatomic, readwrite, copy) NSUUID* credentialExchangeImportUUID;
 // Boolean to track if the app is open in an user unexpected mode.
 // When a certain enterprise policy has been set, it's possible that one browser
 // mode is disabled. When the user intends to open an unavailable mode of

ios/chrome/app/app_startup_parameters.mm

@@ -237,6 +237,7 @@ - (BOOL)isValidPostOpeningAction:(TabOpeningPostOpeningAction)action {
     case SHOW_DEFAULT_BROWSER_SETTINGS:
     case EXTERNAL_ACTION_SHOW_BROWSER_SETTINGS:
     case SEARCH_PASSWORDS:
+    case CREDENTIAL_EXCHANGE_IMPORT:
       return YES;
 
       // Lens action are valid on empty URLs, in addition to

ios/chrome/browser/browser_view/ui_bundled/BUILD.gn

@@ -298,6 +298,7 @@ source_set("ui_bundled") {
     "//ios/chrome/browser/web/model/font_size",
     "//ios/chrome/browser/web/model/print",
     "//ios/chrome/browser/web_state_list/model/web_usage_enabler",
+    "//ios/chrome/browser/webauthn/coordinator",
     "//ios/chrome/browser/webui/model",
     "//ios/chrome/browser/webui/ui_bundled:coordinator",
     "//ios/chrome/browser/whats_new/coordinator",

ios/chrome/browser/browser_view/ui_bundled/DEPS

@@ -129,6 +129,7 @@ include_rules = [
   "+ios/chrome/browser/voice/ui_bundled",
   "+ios/chrome/browser/web/model",
   "+ios/chrome/browser/web_state_list/model",
+  "+ios/chrome/browser/webauthn/coordinator",
   "+ios/chrome/browser/webui",
   "+ios/chrome/browser/whats_new/coordinator",
   "+ios/chrome/browser/window_activities/model/window_activity_helpers.h",

ios/chrome/browser/browser_view/ui_bundled/browser_coordinator.mm

@@ -232,6 +232,7 @@
 #import "ios/chrome/browser/shared/public/commands/contextual_panel_entrypoint_iph_commands.h"
 #import "ios/chrome/browser/shared/public/commands/contextual_sheet_commands.h"
 #import "ios/chrome/browser/shared/public/commands/country_code_picker_commands.h"
+#import "ios/chrome/browser/shared/public/commands/credential_exchange_commands.h"
 #import "ios/chrome/browser/shared/public/commands/download_list_commands.h"
 #import "ios/chrome/browser/shared/public/commands/drive_file_picker_commands.h"
 #import "ios/chrome/browser/shared/public/commands/enhanced_calendar_commands.h"
@@ -332,6 +333,7 @@
 #import "ios/chrome/browser/web/model/web_state_delegate_browser_agent.h"
 #import "ios/chrome/browser/web_state_list/model/web_usage_enabler/web_usage_enabler_browser_agent.h"
 #import "ios/chrome/browser/web_state_list/model/web_usage_enabler/web_usage_enabler_browser_agent_observer_bridge.h"
+#import "ios/chrome/browser/webauthn/coordinator/credential_import_coordinator.h"
 #import "ios/chrome/browser/webui/model/net_export_tab_helper_delegate.h"
 #import "ios/chrome/browser/webui/ui_bundled/net_export_coordinator.h"
 #import "ios/chrome/browser/whats_new/coordinator/whats_new_coordinator.h"
@@ -373,6 +375,7 @@ @interface BrowserCoordinator () <
     ContextualPanelEntrypointIPHCommands,
     ContextualSheetCommands,
     CountryCodePickerCommands,
+    CredentialExchangeCommands,
     DefaultBrowserGenericPromoCommands,
     DefaultPromoNonModalPresentationDelegate,
     DownloadListCommands,
@@ -741,6 +744,9 @@ @implementation BrowserCoordinator {
 
   // The coordinator for the Welcome Back promo.
   WelcomeBackCoordinator* _welcomeBackCoordinator;
+
+  // The coordinator for the Credential Exchange feature handling the import.
+  CredentialImportCoordinator* _credentialImportCoordinator;
 }
 
 #pragma mark - ReaderModeBrowserAgentDelegate
@@ -1212,7 +1218,8 @@ - (void)createViewControllerDependencies {
     @protocol(CountryCodePickerCommands),
     @protocol(WhatsNewCommands),
     @protocol(GoogleOneCommands),
-    @protocol(WelcomeBackPromoCommands)
+    @protocol(WelcomeBackPromoCommands),
+    @protocol(CredentialExchangeCommands),
   ];
 
   for (Protocol* protocol in protocols) {
@@ -1786,6 +1793,9 @@ - (void)stopChildCoordinators {
   [_BWGCoordinator stop];
   _BWGCoordinator = nil;
 
+  [_credentialImportCoordinator stop];
+  _credentialImportCoordinator = nil;
+
   [self hideDriveFilePicker];
   [self hideContextualSheet];
   [self dismissEditAddressBottomSheet];
@@ -3103,6 +3113,16 @@ - (void)hideCountryCodePicker {
   _countryCodePickerCoordinator = nil;
 }
 
+#pragma mark - CredentialExchangeCommands
+
+- (void)showCredentialExchangeImport:(NSUUID*)UUID {
+  _credentialImportCoordinator = [[CredentialImportCoordinator alloc]
+      initWithBaseViewController:self.viewController
+                         browser:self.browser
+                            UUID:UUID];
+  [_credentialImportCoordinator start];
+}
+
 #pragma mark - BWGCommands
 
 - (void)startBWGFlowWithEntryPoint:(bwg::EntryPoint)entryPoint {

ios/chrome/browser/intents/model/BUILD.gn

@@ -50,6 +50,7 @@ source_set("user_activity_browser_agent") {
     "//ios/chrome/app/profile",
     "//ios/chrome/app/spotlight",
     "//ios/chrome/app/startup:startup_basic",
+    "//ios/chrome/browser/credential_provider/model:features",
     "//ios/chrome/browser/intents/model:intent_type",
     "//ios/chrome/browser/lens/ui_bundled:lens_availability",
     "//ios/chrome/browser/lens/ui_bundled:lens_entrypoint",
@@ -63,6 +64,7 @@ source_set("user_activity_browser_agent") {
     "//ios/chrome/browser/shared/public/features",
     "//ios/chrome/browser/url_loading/model",
     "//ios/chrome/browser/url_loading/model:url_loading_params_header",
+    "//ios/chrome/browser/webauthn/model:credential_import_manager_swift",
     "//ios/chrome/common/intents:intents_generate_source",
     "//ui/base",
     "//url",

ios/chrome/browser/intents/model/DEPS

@@ -1,8 +1,10 @@
 include_rules = [
+  "+ios/chrome/browser/credential_provider/model/features.h",
+  "+ios/chrome/browser/lens",
   "+ios/chrome/browser/metrics/model",
   "+ios/chrome/browser/policy/model",
   "+ios/chrome/browser/search_engines/model",
   "+ios/chrome/browser/shared/coordinator/scene",
   "+ios/chrome/browser/url_loading/model",
-  "+ios/chrome/browser/lens",
+  "+ios/chrome/browser/webauthn/model",
 ]

ios/chrome/browser/intents/model/user_activity_browser_agent.mm

@@ -26,6 +26,7 @@
 #import "ios/chrome/app/spotlight/actions_spotlight_manager.h"
 #import "ios/chrome/app/spotlight/spotlight_util.h"
 #import "ios/chrome/app/startup/app_launch_metrics.h"
+#import "ios/chrome/browser/credential_provider/model/features.h"
 #import "ios/chrome/browser/intents/model/intent_type.h"
 #import "ios/chrome/browser/intents/model/intents_constants.h"
 #import "ios/chrome/browser/lens/ui_bundled/lens_availability.h"
@@ -47,6 +48,7 @@
 #import "ios/chrome/browser/shared/public/features/features.h"
 #import "ios/chrome/browser/url_loading/model/image_search_param_generator.h"
 #import "ios/chrome/browser/url_loading/model/url_loading_params.h"
+#import "ios/chrome/browser/webauthn/model/credential_import_manager_swift.h"
 #import "ios/chrome/common/intents/AddBookmarkToChromeIntent.h"
 #import "ios/chrome/common/intents/AddReadingListItemToChromeIntent.h"
 #import "ios/chrome/common/intents/OpenInChromeIncognitoIntent.h"
@@ -128,6 +130,17 @@ bool IsProfileStateReady(Browser* browser) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   NSURL* webpage_url = user_activity.webpageURL;
 
+  // Credential exchange activity should only be handled in iOS 26 with the
+  // compile-time flag controlling the feature enabled.
+  BOOL isCredentialExchangeActivity = NO;
+  if (@available(iOS 26, *)) {
+    isCredentialExchangeActivity =
+        CredentialExchangeEnabled() &&
+        [user_activity.activityType
+            isEqualToString:[CredentialImportManager
+                                credentialExchangeActivity]];
+  }
+
   if ([user_activity.activityType
           isEqualToString:handoff::kChromeHandoffActivityType] ||
       [user_activity.activityType
@@ -487,6 +500,24 @@ GURL webpage_GURL(
     [connection_information_
         setStartupParameters:StartupParametersForOpeningNewTab(
                                  OPEN_CLEAR_BROWSING_DATA_DIALOG)];
+  } else if (isCredentialExchangeActivity) {
+    id UUID;
+    if (@available(iOS 26, *)) {
+      UUID = [user_activity.userInfo
+          objectForKey:[CredentialImportManager credentialImportToken]];
+    }
+    if (![UUID isKindOfClass:[NSUUID class]]) {
+      return NO;
+    }
+
+    AppStartupParameters* startup_params = [[AppStartupParameters alloc]
+         initWithExternalURL:GURL()
+                 completeURL:GURL()
+             applicationMode:ApplicationModeForTabOpening::NORMAL
+        forceApplicationMode:NO];
+    startup_params.postOpeningAction = CREDENTIAL_EXCHANGE_IMPORT;
+    startup_params.credentialExchangeImportUUID = (NSUUID*)UUID;
+    [connection_information_ setStartupParameters:startup_params];
   } else {
     // Do nothing for unknown activity type.
     return NO;

ios/chrome/browser/shared/coordinator/scene/scene_controller.mm

@@ -164,6 +164,7 @@
 #import "ios/chrome/browser/shared/public/commands/browser_commands.h"
 #import "ios/chrome/browser/shared/public/commands/browser_coordinator_commands.h"
 #import "ios/chrome/browser/shared/public/commands/command_dispatcher.h"
+#import "ios/chrome/browser/shared/public/commands/credential_exchange_commands.h"
 #import "ios/chrome/browser/shared/public/commands/lens_commands.h"
 #import "ios/chrome/browser/shared/public/commands/omnibox_commands.h"
 #import "ios/chrome/browser/shared/public/commands/open_lens_input_selection_command.h"
@@ -3203,6 +3204,10 @@ - (ProceduralBlock)completionBlockForTriggeringAction:
       return ^{
         [weakSelf searchShareExtensionImageWithLens];
       };
+    case CREDENTIAL_EXCHANGE_IMPORT:
+      return ^{
+        [weakSelf importCredentials];
+      };
     default:
       return nil;
   }
@@ -3418,6 +3423,15 @@ - (void)addReadingListItems:(NSArray<NSURL*>*)URLs {
   readingListBrowserAgent->BulkAddURLsToReadingListWithViewSnackbar(URLs);
 }
 
+- (void)importCredentials {
+  id<CredentialExchangeCommands> credentialExchangeCommands =
+      HandlerForProtocol(self.currentInterface.browser->GetCommandDispatcher(),
+                         CredentialExchangeCommands);
+  [credentialExchangeCommands
+      showCredentialExchangeImport:self.startupParameters
+                                       .credentialExchangeImportUUID];
+}
+
 #pragma mark - TabOpening implementation.
 
 - (void)dismissModalsAndMaybeOpenSelectedTabInMode:

ios/chrome/browser/shared/public/commands/BUILD.gn

@@ -24,6 +24,7 @@ source_set("commands") {
     "contextual_panel_entrypoint_iph_commands.h",
     "contextual_sheet_commands.h",
     "country_code_picker_commands.h",
+    "credential_exchange_commands.h",
     "credential_provider_promo_commands.h",
     "docking_promo_commands.h",
     "download_list_commands.h",