Prioritize user privacy and data security in your app. Discuss best practices for data handling, user consent, and security measures to protect user information.

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How to implement the "Set Up Codes In" feature
Hello, I have a password manager app and have noticed a new feature in AutoFill & Passwords called "Set Up Codes In". I see that my competitors have been able to implement this feature but cannot find any documentation on how to do this. How can I make it so my app can support this feature. Any help to pointing me to the documentation or otherwise would be greatly appreciated. Thanks! //Ray
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Apr ’25
Retrieving private-public-certificate triples from keychain
Hi there, I'm currently working on a compatibility feature for Apple that allows the user to manage their keys and certificates from within our internal API. For this I need to retrieve all the items contained within keychains. I am looking at the documentation for SecItem API but so far I have not really found an obvious way to link these items together. My best guess so far is to perform two queries, grabbing all SecKeys from the keychains, pairing them up with public keys through SecKeyCopyPublicKey, then downloading all CertItems and pairing them with public keys with SecCertificateCopyKey, and then join the two using public keys. This sounds however somewhat involved and I was wondering if there was a better way of going about the process?
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Dec ’24
"My App" would like to access data from other apps pop up
Hi All, I have a finder sync extension that passes data back to my main app. It currently writes to a plist file in my group container folder. Since updating to macOS 15, I have been getting this pop-up every time I trigger this writing to the plist after the finder sync extension loads. This is how I write to the plist from my finder sync extension: let appGroupDefaults = UserDefaults(suiteName: "group.team_id.Finder-Sync-Extension-Test-Project") let items = FIFinderSyncController.default().selectedItemURLs() DispatchQueue.main.async { let url = items?.first?.absoluteString var file = items?.first?.lastPathComponent if let defaults = appGroupDefaults{ defaults.set(url, forKey: "targetURL") defaults.synchronize() } self.showWindow(with: NSExtensionContext()) } This is how I read the plist from my main app: if let defaults = UserDefaults(suiteName: "group.team_id.Finder-Sync-Extension-Test-Project") { defaults.synchronize() if let clickedUrl = defaults.string(forKey: "targetURL") { window = NSWindow(contentRect: NSScreen.main?.frame ?? .zero, styleMask: [.miniaturizable, .closable, .resizable, .titled], backing: .buffered, defer: false) window?.title = "My App" window?.makeKeyAndOrderFront(nil) textField.stringValue = clickedUrl window?.contentView?.addSubview(textField) } } It is fine if this popup happens once and the user's choice gets remembered. I just don't want it to happen every time. Any help on if this is the correct way to pass data between the finder sync extension and the main app or on how to get macOS to remember the choice of the user would be great. Thanks, James
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523
Jan ’25
Login controls to remain onscreen when using SFAuthorizationPluginView.
Regarding the issue of login controls remaining on screen for a few seconds when using a subclass of SFAuthorizationPluginView, I wanted to inquire whether any progress has been made on resolving it. To recap, per notes I found in the QAuthPlugins sample code: Due to a bug (FB12074874), the use of an SFAuthorizationPluginView subclass can cause the login controls to remain onscreen for a significant amount of time (roughly 5 seconds) after login is complete, resulting in them being onscreen at the same time as the Finder’s menu bar and the Dock. The exact circumstances under which this happens are not well understood, but one factor seems to be running on a laptop where the main display is mirrored to an external display. Specifically, I would like to know: If there any other information about how the issue is reproduced? For my part I can say that it reproduces with out the use of a mirrored display. So far it reproduces for all of our developers and testers, all of the time. Are there any known workarounds? Is there any expectation that this issue will be addressed? Thank you so much!
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Apr ’25
Repeated "Invalid Client" Error with Sign In with Apple
Hi everyone, I'm having a recurring issue with the "Sign in with Apple" integration in my web app, and I’m hoping someone here can help or share insights. Here’s the situation: I implemented "Sign in with Apple" following the official documentation, and it worked perfectly at first. After about two weeks, I started getting the "invalid_client" error when redirecting to the authentication page. I reviewed everything and discovered I hadn’t set up the email configuration properly in the Apple Developer Console. Once I fixed that, it worked fine again. Now, the same error ("invalid_client") has returned, and I’ve triple-checked every part of my configuration: The service ID, redirect URIs, and domain settings match exactly. The client_secret is generated correctly with all required fields (iss, iat, exp, aud, and sub) and signed with ES256. My server time is synchronized. Nothing has changed in my code or configuration since it last worked. This seems to be an issue on Apple’s end because everything was functioning perfectly before, and I’ve already resolved this once by updating settings in the Developer Console. Has anyone else faced this issue? Is there something I might be missing, or could this be a problem with Apple’s service? Any advice or guidance would be greatly appreciated!
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484
Dec ’24
iOS 18 - Intermittent keychain issue
Hi, We're encountering an intermittent issue where certain users are unexpectedly logged out of our app and unable to log in again. We believe we've narrrowed down the issue to the Keychain due to the following reasons: We use a keychain item to determine if the member is logged in or not. Failure to retrieve the value leads the app to believe the member is logged out. API error logs on the server show 3 missing values in fields that are each populated from items stored in the keychain. Additional Notes: The issue is hard to reproduce and seems to affect only a subset of users. In some cases, uninstalling and reinstalling the app temporarily resolves the problem, but the issue recurs after a period of time. The behavior appears to have coincided with the release of iOS 18. We’re using the “kSecAttrAccessibleWhenUnlocked” accessibility attribute. Given that our app doesn’t perform background operations, we wouldn’t expect this to be an issue. We’re also considering changing this to "kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly" to see if this might resolve the issue. We're the keychain-swift library to interact with the keychain. We are currently adding extensive logging around our keychain implementation to confirm our findings but are looking for any additional input. Questions: Has anyone encountered similar keychain behavior on iOS 18? Are there known changes or stability issues with the keychain in iOS 18 that might lead to such intermittent “item not found” errors? Any recommended workarounds or troubleshooting steps that could help isolate the problem further? Thanks for any help you can provide.
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590
Feb ’25
ASCredentialProvider/ProvidesTextToInsert macOS support
Hi, ASCredentialProvider had been almost identically implemented on both iOS and macOS so far, but the ProvidesTextToInsert feature was only added to iOS. It would have been a crucial point to make Credential Providers available in all textfields, without users having to rely on developers correctly setting roles for their Text Fields. It's right now impossible to paste credentials into Notes, or some other non-password text box both in web and desktop apps for example, in a seamless, OS-supported way without abusing Accessibility APIs which are understandably disallowed in Mac App Store apps. Or just pasting an SSH key, or anything. On macOS this has so many possibilities. It could even have a terminal command. It's even more interesting that "Passwords..." is an option in macOS's AutoFill context menu, just like on iOS, however Credential Providers did not gain this feature on macOS, only on iOS. Is this an upcoming feature, or should we find alternatives? Or should I file a feature request? If it's already in the works, it's pointless to file it.
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Apr ’25
Issue with DCAppAttestService for offloaded app
Hi, When calling generateAssertion on DCAppAttestService.shared, it gives invalidKey error when there was an update for an offloaded app. The offloading and reinstall always works fine if it is the same version on app store that was offloaded from device, but if there is an update and the app tries to reuse the keyID from previous installation for generateAssertion, attestation service rejects the key with error code 3 (invalid key) for a significant portion of our user. In our internal testing it failed for more than a third of the update attempts. STEPS TO REPRODUCE: install v1 from app store generate key using DCAppAttestService.shared.generateKey Attest this key using DCAppAttestService.shared.attestKey Send the attestation objection to our server and verify with apple servers Generate assertions for network calls to backend using DCAppAttestService.shared.generateAssertion with keyID from step 2 Device offloads the app (manually triggered by user, or automatically by iOS) A new version v2 is published to App Store Use tries to open the app Latest version is download from the App Store App tries to use the keyID from step 2 to generate assertions DCAppAttestService throws invalidKey error (Error Domain=com.apple.devicecheck.error Code=3) Step 7 is critical here, if there is no new version of the app, the reinstalled v1 can reuse the key from step 2 without any issues Is this behaviour expected? Is there any way we can make sure the key is preserved between offloaded app updates? Thanks
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Feb ’25
Unit tests and persistent tokens
I'd like to implement unit tests that exercise keys made available via a persistent token interface. However, when attempting to list available tokens by passing kSecAttrAccessGroupToken as the kSecAttrAccessGroup to SecItemCopyMatching from a unit test, -34018 is returned. It succeeds without the kSecAttrAccessGroup, which makes sense given the unit test binary does not have com.apple.token Keychain Group. The Xcode UI indicates "Capabilities are not supported" for the unit test binary when attempting to add a Keychain Sharing capability to enable use of persistent tokens. This feels like a dead end but begs the question is there any way to implement unit tests to exercise a persistent token interface? It seems like the only path may be write unit tests that drive an independent app that handles the interactions with the persistent token.
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468
Feb ’25
WebView-Based Authentication in macOS Authorization Plugin
I am developing an Authorization plugin for macOS that should be invoked when a user unlocks their device from the lock screen. Based on advice from the other threads in these forums, I have understood that: The plugin needs to use SFAuthorizationPluginView The auth db entries to modify are system.login.screensaver and authenticate I found the NameAndPassword sample and after making some tweaks to it was able to get it to work from screensaver unlock. I am trying to add Webview-based authentication to the plugin, but have not had any success. The plugin window's width does not change (though the height does) and only a small portion of the HTML gets rendered. Is Webview-based authentication supported with SFAuthorizationPluginView? Are there any alternatives?
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216
Mar ’25
LAContext and smart cards
In one of our applications we use LAContext's evaluatePolicy:localizedReason:reply: to authenticate a user. This works pretty well with both username/password and Touch ID. Now we have a request to add support for smart cards and I wonder if this is possible using LAContext. Otherwise I would use Authentication Services, although that might be a bit overkill since we don't need to request any rights, we just want to see that the user has been successfully authenticated. Or is there a better way? Any help would be greatly appreciated. Thanks, Marc
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Jan ’25
Does SecTrustEvaluateWithError validates External Reference Identifiers?
Trying to validate external reference identifiers with SecTrustEvaluateWithError Method by setting reference Ids to SecPolicyCreateSSL() & SecPolicyCreateWithProperties() But two concerns are - Validates for correct reference IDs but gives error for combination of wrong & correct reference Ids 398 days validity works mandatorily before reference Ids check. Is there any other to validate external reference Ids?, which give flexibility To pass multiple combinations of reference IDs string (wrong, correct, IP, DNS) To validate reference ID without days validity of 398. Please suggest. Any help here is highly appreciated.
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Mar ’25
How to Restrict Passkey Authentication to FaceID or TouchID Only
Hi everyone, I'm looking for a way to configure Passkey on iOS so that authentication is only possible using FaceID or TouchID. Specifically, I want to disable the use of passcodes and QR codes for authentication. Additionally, is there a method to detect if the authentication was done using a passcode or QR code? Thanks for your help!
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520
Apr ’25
When is kSecAttrService actually required when saving an item to the Keychain?
I was basically saving items into the Keychain with the following query dictionary: let query: [String: Any] = [ kSecClass as String: kSecClassGenericPassword, kSecAttrAccount as String: key, kSecValueData as String: value, kSecAttrAccessible as String: kSecAttrAccessibleAfterFirstUnlock ] Where key is a String value and value is a Data that used to be a String. I was getting the following error: code: -25299 description: The specified item already exists in the keychain After a lot of digging in I saw that I needed to add kSecAttrService to the dictionary and after that it all started working. The service value is a String value. let query: [String: Any] = [ kSecClass as String: kSecClassGenericPassword, kSecAttrService as String: service, kSecAttrAccount as String: key, kSecValueData as String: value, kSecAttrAccessible as String: kSecAttrAccessibleAfterFirstUnlock ] These were the articles that suggested adding the kSecAttrService parameter: https://stackoverflow.com/a/11672200 https://stackoverflow.com/a/58233542 But in the same code base I found that other developers were saving using a dictionary similar to the one I first provided and it works: var query: [String : Any] = [ kSecClass as String : kSecClassGenericPassword as String, kSecAttrAccount as String : key, kSecValueData as String : data ] I don't know how to explain why my first implementation didn't work even though it was similar to what was already in the code base but the second approach worked well. Regardless of the query dictionary, this is how I'm saving things: static func save(value: Data, key: String, service: String) -> KeyChainOperationStatus { logInfo("Save Value - started, key: \(key), service: \(service)") let query: [String: Any] = [ kSecClass as String: kSecClassGenericPassword, kSecAttrService as String: service, kSecAttrAccount as String: key, kSecValueData as String: value, kSecAttrAccessible as String: kSecAttrAccessibleAfterFirstUnlock ] // Remove any existing key let cleanUpStatus = SecItemDelete(query as CFDictionary) let cleanUpStatusDescription = SecCopyErrorMessageString(cleanUpStatus, nil)?.asString ?? "__cleanup_status_unavailable" logInfo("Save Value - cleanup status: \(cleanUpStatus), description: \(cleanUpStatusDescription)") guard cleanUpStatus == errSecSuccess || cleanUpStatus == errSecItemNotFound else { logError("Save Value - Failed cleaning up KeyChain") return .cleanupFailed(code: cleanUpStatus) } // Add the new key let saveStatus = SecItemAdd(query as CFDictionary, nil) let saveStatusDescription = SecCopyErrorMessageString(saveStatus, nil)?.asString ?? "__save_status_unavailable" logInfo("Save Value - save status [\(saveStatus)] : \(saveStatusDescription)") guard saveStatus == errSecSuccess else { logError("Save Value - Failed saving new value into KeyChain") return .savingFailed(code: saveStatus) } return .successs }
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Feb ’25
How to Localize Biometric Prompt for SecKeyCreateSignature with Secure Enclave
I'm using Secure Enclave to generate and use a private key like this: let access = SecAccessControlCreateWithFlags(nil, kSecAttrAccessibleWhenUnlockedThisDeviceOnly, [.privateKeyUsage, .biometryAny], nil) let attributes: [String: Any] = [ kSecAttrKeyType as String: kSecAttrKeyTypeECSECPrimeRandom, kSecAttrKeySizeInBits as String: 256, kSecAttrTokenID as String: kSecAttrTokenIDSecureEnclave, kSecAttrAccessControl as String: access as Any, kSecAttrApplicationTag as String: "com.example.key".data(using: .utf8)!, kSecReturnRef as String: true ] let privateKey = SecKeyCreateRandomKey(attributes as CFDictionary, nil) Later, I use this key to sign a message: let signature = SecKeyCreateSignature(privateKey, .ecdsaSignatureMessageX962SHA256, dataToSign as CFData, nil) This prompts for biometric authentication, but shows the default system text. How can I customize or localize the biometric prompt (e.g., title, description, button text) shown during SecKeyCreateSignature? Thanks!
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Apr ’25
sending to Private Relay Email using amazon ses not working
Hello Developers, I have ran into a problem while sending mail to apple private relay email. We have built a mobile application where user can sign up through apple and they can sign up using hide-my-email feature. Which provides private relay address for us. Now we want to communicate with them using private relay mail address. The technology we are using to send emails are amazon SES, have done SPF, DMIK, DMARC and added domains in apple identity services for mail communication, passed an SPF check as well. But still mail is not getting delivered what am i doing wrong or apple doesn't support third party apps for sending emails to private relay? Is there any other way to achieve this please let me know Using the same body as attached in image is working fine for rest emails.
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628
Dec ’24
Enable Safari autofill from my password manager app
Hello, I have a password manager app and would like to help my user's to enable the Safari autofill capability. I've made the password credential extension and that is working great. I just need to help my user's enable the feature. I could point them to Settings->General->AutoFill & Password and instruct them to turn the feature on. However, I've noticed that my competitors are able to present an alert directly from their app to turn the feature on (without going to settings at all). I can't find any documentation on how to do this? Thanks for your help! //Ray
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Apr ’25