feat: Implement UseUserAccessGroup for iOS#1756
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This commit introduces the `UseUserAccessGroup` method in the Firebase C++ Authentication SDK. This method allows developers to specify a user access group for keychain operations on iOS, enabling keychain sharing between apps from the same developer. It wraps the `[FIRAuth useUserAccessGroup:error:]` Objective-C method. - Added `Auth::UseUserAccessGroup(const char* access_group)` to the public API in `firebase/auth.h`. - Implemented the method for iOS in `auth_ios.mm`, calling the corresponding FIRAuth method and handling potential errors. - Provided no-op stub implementations for Android and desktop platforms, as the functionality is iOS-specific. The method returns `kAuthErrorNone` on success or if it's a no-op on non-iOS platforms. On iOS, it returns an appropriate `AuthError` if the underlying Objective-C method reports an error.
jonsimantov
commented
Jun 27, 2025
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| AuthError Auth::UseUserAccessGroup(const char* access_group) { | ||
| // No-op on Android. | ||
| return kAuthErrorNone; |
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Return Unimplemented instead of None
jonsimantov
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Jun 27, 2025
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| AuthError Auth::UseUserAccessGroup(const char* access_group) { | ||
| if (!auth_data_) { | ||
| return kAuthErrorNone; // Or appropriate error if auth_data_ is unexpectedly null |
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Return Not Initialized error
jonsimantov
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Jun 27, 2025
| FIRAuth* fir_auth = AuthImpl(auth_data_); | ||
| NSString* ns_access_group = nil; | ||
| if (access_group) { | ||
| ns_access_group = [NSString stringWithUTF8String:access_group]; |
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Handle an empty string too
This commit incorporates feedback for the `UseUserAccessGroup` method: - Stub implementations for Android and desktop now return `kAuthErrorUnimplemented` instead of `kAuthErrorNone`. - The iOS implementation now returns `kAuthErrorUninitialized` if `auth_data_` is null. - The iOS implementation now treats an empty string for `access_group` the same as `nullptr` (passing `nil` to the Objective-C method).
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This commit introduces the
UseUserAccessGroupmethod in the Firebase C++ Authentication SDK.This method allows developers to specify a user access group for keychain operations on iOS, enabling keychain sharing between apps from the same developer. It wraps the
[FIRAuth useUserAccessGroup:error:]Objective-C method.Auth::UseUserAccessGroup(const char* access_group)to the public API infirebase/auth.h.auth_ios.mm, calling the corresponding FIRAuth method and handling potential errors.The method returns
kAuthErrorNoneon success or if it's a no-op on non-iOS platforms. On iOS, it returns an appropriateAuthErrorif the underlying Objective-C method reports an error.Description
Testing
Type of Change
Place an
xthe applicable box:Notes
Release Notessection ofrelease_build_files/readme.md.