Start the incremental authorization flow by creating OIDAuthorizationRequest.

GoogleSignIn/Sources/GIDGoogleUser.m

@@ -23,6 +23,7 @@
 #import "GoogleSignIn/Sources/GIDEMMSupport.h"
 #import "GoogleSignIn/Sources/GIDProfileData_Private.h"
 #import "GoogleSignIn/Sources/GIDSignIn_Private.h"
+#import "GoogleSignIn/Sources/GIDSignInConstants.h"
 #import "GoogleSignIn/Sources/GIDSignInPreferences.h"
 #import "GoogleSignIn/Sources/GIDToken_Private.h"
 
@@ -43,10 +44,6 @@
 static NSString *const kProfileDataKey = @"profileData";
 static NSString *const kAuthStateKey = @"authState";
 
-// Parameters for the token exchange endpoint.
-static NSString *const kAudienceParameter = @"audience";
-static NSString *const kOpenIDRealmParameter = @"openid.realm";
-
 // Additional parameter names for EMM.
 static NSString *const kEMMSupportParameterName = @"emm_support";
 

GoogleSignIn/Sources/GIDSignIn.m

@@ -22,6 +22,7 @@
 #import "GoogleSignIn/Sources/Public/GoogleSignIn/GIDSignInResult.h"
 
 #import "GoogleSignIn/Sources/GIDEMMSupport.h"
+#import "GoogleSignIn/Sources/GIDSignInConstants.h"
 #import "GoogleSignIn/Sources/GIDSignInInternalOptions.h"
 #import "GoogleSignIn/Sources/GIDSignInPreferences.h"
 #import "GoogleSignIn/Sources/GIDCallbackQueue.h"
@@ -69,21 +70,12 @@
 // The name of the query parameter used for logging the restart of auth from EMM callback.
 static NSString *const kEMMRestartAuthParameter = @"emmres";
 
-// The URL template for the authorization endpoint.
-static NSString *const kAuthorizationURLTemplate = @"https://%@/o/oauth2/v2/auth";
-
-// The URL template for the token endpoint.
-static NSString *const kTokenURLTemplate = @"https://%@/token";
-
 // The URL template for the URL to get user info.
 static NSString *const kUserInfoURLTemplate = @"https://%@/oauth2/v3/userinfo?access_token=%@";
 
 // The URL template for the URL to revoke the token.
 static NSString *const kRevokeTokenURLTemplate = @"https://%@/o/oauth2/revoke?token=%@";
 
-// Expected path in the URL scheme to be handled.
-static NSString *const kBrowserCallbackPath = @"/oauth2callback";
-
 // Expected path for EMM callback.
 static NSString *const kEMMCallbackPath = @"/emmcallback";
 
@@ -124,14 +116,6 @@
 // The delay before the new sign-in flow can be presented after the existing one is cancelled.
 static const NSTimeInterval kPresentationDelayAfterCancel = 1.0;
 
-// Parameters for the auth and token exchange endpoints.
-static NSString *const kAudienceParameter = @"audience";
-// See b/11669751 .
-static NSString *const kOpenIDRealmParameter = @"openid.realm";
-static NSString *const kIncludeGrantedScopesParameter = @"include_granted_scopes";
-static NSString *const kLoginHintParameter = @"login_hint";
-static NSString *const kHostedDomainParameter = @"hd";
-
 // Minimum time to expiration for a restored access token.
 static const NSTimeInterval kMinimumRestoredAccessTokenTimeToExpire = 600.0;
 

GoogleSignIn/Sources/GIDSignInConstants.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/// The URL template for the authorization endpoint.
+extern NSString *const kAuthorizationURLTemplate;
+
+/// The URL template for the token endpoint.
+extern NSString *const kTokenURLTemplate;
+
+/// Expected path in the URL scheme to be handled.
+extern NSString *const kBrowserCallbackPath;
+
+/// The name of the audience parameter for the auth and token exchange endpoints.
+extern NSString *const kAudienceParameter;
+
+/// The name of the open ID realm parameter for the auth and token exchange endpoints.
+extern NSString *const kOpenIDRealmParameter;
+
+/// The name of the include granted scopes parameter for the auth and token exchange endpoints.
+extern NSString *const kIncludeGrantedScopesParameter;
+
+/// The name of the login hint parameter for the auth and token exchange endpoints.
+extern NSString *const kLoginHintParameter;
+
+/// The name of the hosted domain parameter for the auth and token exchange endpoints.
+extern NSString *const kHostedDomainParameter;

GoogleSignIn/Sources/GIDSignInConstants.m

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "GoogleSignIn/Sources/GIDSignInConstants.h"
+
+NSString *const kAuthorizationURLTemplate = @"https://%@/o/oauth2/v2/auth";
+NSString *const kTokenURLTemplate = @"https://%@/token";
+NSString *const kBrowserCallbackPath = @"/oauth2callback";
+
+NSString *const kAudienceParameter = @"audience";
+NSString *const kOpenIDRealmParameter = @"openid.realm";
+NSString *const kIncludeGrantedScopesParameter = @"include_granted_scopes";
+NSString *const kLoginHintParameter = @"login_hint";
+NSString *const kHostedDomainParameter = @"hd";

GoogleSignIn/Sources/GIDSignInInternalOptions.h

@@ -24,9 +24,9 @@
 
 #import "GoogleSignIn/Sources/GIDSignIn_Private.h"
 
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 #import "GoogleSignIn/Sources/Public/GoogleSignIn/GIDVerifyAccountDetail.h"
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 
 @class GIDConfiguration;
 @class GIDSignInResult;
@@ -45,10 +45,10 @@ NS_ASSUME_NONNULL_BEGIN
 /// Whether the sign-in is an addScopes flow. NO means it is a sign in flow.
 @property(nonatomic, readonly) BOOL addScopesFlow;
 
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 /// The user account details the Verify with Google flow will verify
 @property(nonatomic, copy, nullable, readonly) NSArray<GIDVerifiableAccountDetail *> *accountDetailsToVerify;
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 
 /// The extra parameters used in the sign-in URL.
 @property(nonatomic, readonly, nullable) NSDictionary *extraParams;
@@ -67,10 +67,10 @@ NS_ASSUME_NONNULL_BEGIN
 /// The completion block to be called at the completion of the flow.
 @property(nonatomic, readonly, nullable) GIDSignInCompletion completion;
 
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 /// The completion block to be called at the completion of the verify flow.
 @property(nonatomic, readonly, nullable) GIDVerifyCompletion verifyCompletion;
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 
 /// The scopes to be used during the flow.
 @property(nonatomic, copy, nullable) NSArray<NSString *> *scopes;
@@ -79,14 +79,14 @@ NS_ASSUME_NONNULL_BEGIN
 @property(nonatomic, copy, nullable) NSString *loginHint;
 
 /// Creates the default options.
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 + (instancetype)defaultOptionsWithConfiguration:(nullable GIDConfiguration *)configuration
                        presentingViewController:(nullable UIViewController *)presentingViewController
                                       loginHint:(nullable NSString *)loginHint
                                   addScopesFlow:(BOOL)addScopesFlow
                          accountDetailsToVerify:(NSArray<GIDVerifiableAccountDetail *> *)accountDetailsToVerify
                                verifyCompletion:(nullable GIDVerifyCompletion)completion;
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 
 #if TARGET_OS_IOS || TARGET_OS_MACCATALYST
 + (instancetype)defaultOptionsWithConfiguration:(nullable GIDConfiguration *)configuration

GoogleSignIn/Sources/GIDSignInInternalOptions.m

@@ -26,7 +26,7 @@
 
 @implementation GIDSignInInternalOptions
 
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 + (instancetype)defaultOptionsWithConfiguration:(nullable GIDConfiguration *)configuration
                        presentingViewController:(nullable UIViewController *)presentingViewController
                                       loginHint:(nullable NSString *)loginHint
@@ -46,7 +46,7 @@ + (instancetype)defaultOptionsWithConfiguration:(nullable GIDConfiguration *)con
   }
   return options;
 }
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 
 #if TARGET_OS_IOS || TARGET_OS_MACCATALYST
 + (instancetype)defaultOptionsWithConfiguration:(nullable GIDConfiguration *)configuration

GoogleSignIn/Sources/GIDVerifyAccountDetail/Implementations/GIDVerifyAccountDetail.m

@@ -22,15 +22,39 @@
 
 #import "GoogleSignIn/Sources/GIDSignInInternalOptions.h"
 #import "GoogleSignIn/Sources/GIDSignInCallbackSchemes.h"
+#import "GoogleSignIn/Sources/GIDSignInConstants.h"
+#import "GoogleSignIn/Sources/GIDSignInPreferences.h"
 
-#if TARGET_OS_IOS
+@import GTMAppAuth;
 
-@implementation GIDVerifyAccountDetail
+#ifdef SWIFT_PACKAGE
+@import AppAuth;
+@import GTMSessionFetcherCore;
+#else
+#import <AppAuth/OIDAuthorizationRequest.h>
+#import <AppAuth/OIDResponseTypes.h>
+#import <AppAuth/OIDServiceConfiguration.h>
+#endif
+
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
+
+@implementation GIDVerifyAccountDetail {
+  /// AppAuth configuration object.
+  OIDServiceConfiguration *_appAuthConfiguration;
+}
 
 - (instancetype)initWithConfig:(GIDConfiguration *)configuration {
   self = [super init];
   if (self) {
     _configuration = configuration;
+
+    NSString *authorizationEndpointURL = [NSString stringWithFormat:kAuthorizationURLTemplate,
+        [GIDSignInPreferences googleAuthorizationServer]];
+    NSString *tokenEndpointURL = [NSString stringWithFormat:kTokenURLTemplate,
+        [GIDSignInPreferences googleTokenServer]];
+    _appAuthConfiguration = [[OIDServiceConfiguration alloc]
+        initWithAuthorizationEndpoint:[NSURL URLWithString:authorizationEndpointURL]
+                        tokenEndpoint:[NSURL URLWithString:tokenEndpointURL]];
   }
   return self;
 }
@@ -102,15 +126,47 @@ - (void)verifyAccountDetailsInteractivelyWithOptions:(GIDSignInInternalOptions *
 
   // If the application does not support the required URL schemes tell the developer so.
   GIDSignInCallbackSchemes *schemes =
-  [[GIDSignInCallbackSchemes alloc] initWithClientIdentifier:options.configuration.clientID];
+      [[GIDSignInCallbackSchemes alloc] initWithClientIdentifier:options.configuration.clientID];
   NSArray<NSString *> *unsupportedSchemes = [schemes unsupportedSchemes];
   if (unsupportedSchemes.count != 0) {
     // NOLINTNEXTLINE(google-objc-avoid-throwing-exception)
     [NSException raise:NSInvalidArgumentException
                 format:@"Your app is missing support for the following URL schemes: %@",
      [unsupportedSchemes componentsJoinedByString:@", "]];
   }
-  // TODO(#397): Start the incremental authorization flow.
+  NSString *redirectURI =
+      [NSString stringWithFormat:@"%@:%@", [schemes clientIdentifierScheme], kBrowserCallbackPath];
+  NSURL *redirectURL = [NSURL URLWithString:redirectURI];
+
+  NSMutableDictionary<NSString *, NSString *> *additionalParameters = [@{} mutableCopy];
+  if (options.configuration.serverClientID) {
+    additionalParameters[kAudienceParameter] = options.configuration.serverClientID;
+  }
+  if (options.loginHint) {
+    additionalParameters[kLoginHintParameter] = options.loginHint;
+  }
+  if (options.configuration.hostedDomain) {
+    additionalParameters[kHostedDomainParameter] = options.configuration.hostedDomain;
+  }
+  additionalParameters[kSDKVersionLoggingParameter] = GIDVersion();
+  additionalParameters[kEnvironmentLoggingParameter] = GIDEnvironment();
+
+  NSMutableArray *scopes;
+  for (GIDVerifiableAccountDetail *detail in options.accountDetailsToVerify) {
+    NSString *scopeString = [detail scope];
+    if (scopeString) {
+      [scopes addObject:scopeString];
+    }
+  }
+
+  // TODO(#405): Use request variable to present request and process response.
+  __unused OIDAuthorizationRequest *request =
+      [[OIDAuthorizationRequest alloc] initWithConfiguration:_appAuthConfiguration
+                                                    clientId:options.configuration.clientID
+                                                      scopes:scopes
+                                                 redirectURL:redirectURL
+                                                responseType:OIDResponseTypeCode
+                                        additionalParameters:additionalParameters];
 }
 
 #pragma mark - Helpers
@@ -144,4 +200,4 @@ - (void)assertValidPresentingViewController:(GIDSignInInternalOptions *)options
 
 @end
 
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST

GoogleSignIn/Sources/Public/GoogleSignIn/GIDVerifyAccountDetail.h

@@ -16,7 +16,7 @@
 
 #import <TargetConditionals.h>
 
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 
 #import <Foundation/Foundation.h>
 
@@ -91,4 +91,4 @@ typedef void (^GIDVerifyCompletion)(GIDVerifiedAccountDetailResult *_Nullable ve
 
 NS_ASSUME_NONNULL_END
 
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST

GoogleSignIn/Tests/Unit/GIDFakeMainBundle.h

@@ -43,6 +43,7 @@ NS_ASSUME_NONNULL_BEGIN
  * @brief Initializes a GIDFakeMainBundle object with `nil` to all of the designated initializer's parameters.
  */
 - (instancetype)init;
+
 /**
  * @fn startFaking:
  * @brief Starts faking [NSBundle mainBundle]

GoogleSignIn/Tests/Unit/GIDSignInInternalOptionsTest.m

@@ -33,7 +33,7 @@ @interface GIDSignInInternalOptionsTest : XCTestCase
 
 @implementation GIDSignInInternalOptionsTest
 
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 - (void)testDefaultOptionsForVerificationFlow {
   GIDConfiguration *configuration = [[GIDConfiguration alloc] initWithClientID:kClientId
                                                                 serverClientID:nil
@@ -59,7 +59,7 @@ - (void)testDefaultOptionsForVerificationFlow {
   XCTAssertEqual(options.presentingViewController, presentingViewController);
   XCTAssertEqual(options.accountDetailsToVerify, accountDetailsToVerify);
 }
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 
 - (void)testDefaultOptions {
   id configuration = OCMStrictClassMock([GIDConfiguration class]);

GoogleSignIn/Tests/Unit/GIDVerifyAccountDetailTest.m

@@ -14,7 +14,7 @@
 
 #import <XCTest/XCTest.h>
 
-#if TARGET_OS_IOS
+#if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
 #import "GoogleSignIn/Sources/Public/GoogleSignIn/GIDConfiguration.h"
 #import "GoogleSignIn/Sources/Public/GoogleSignIn/GIDVerifyAccountDetail.h"
 #import "GoogleSignIn/Sources/Public/GoogleSignIn/GIDVerifiableAccountDetail.h"
@@ -159,6 +159,8 @@ - (void)testCurrentUserException {
   }
 }
 
+// TODO(#405): Write tests for request and response handling.
+
 - (void)testPresentingViewControllerException {
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wnonnull"
@@ -221,4 +223,4 @@ - (void)testSchemesNotSupportedException {
 
 @end
 
-#endif // TARGET_OS_IOS
+#endif // TARGET_OS_IOS && !TARGET_OS_MACCATALYST