How to implement AutoFill Credential Provider Extensions - iOS 11, swift4

Question

I have been working in iOS autofill credential extension since long days. I have checked so many iOS articles and videos. But I am not able to show credential on quick type bar, reset things are successfully integrated. Can any give me quick help?

Using this video and url which was shared from apple: https://developer.apple.com/videos/play/wwdc2018/721 https://developer.apple.com/documentation/authenticationservices
I am using below code to save credential to Keychain for particular domain.

    let keychain = Keychain(server: "instagram.com", protocolType: .https, authenticationType: .htmlForm)
    keychain["emailAddress"] = "Password"

And use this code for save domain:

func savedomain(domain: String, account: String, password: String, completion: ((Bool, SharedWebCredentialsManagerError?) -> Void)? = nil) {
    SecAddSharedWebCredential(domain as CFString, account as CFString, password as CFString?) { error in
        guard let error = error else {
            completion?(true, nil)
            return
        }
        let errorDescription = CFErrorCopyDescription(error) as String
        let saveFailedError = SharedWebCredentialsManagerError.saveFailed(errorDescription)
        completion?(false, saveFailedError)
    }
}

I have created autofill extension and getting saved credentials, but not able to display credential on quick type bar in safari for instagram.com

score 2 · Answer 1 · answered Feb 25 '21 at 08:12

I have implemented autofill extension for all social sites, Sharing my source code to save emailID-Password with domain.

class func save(key: String, data: Data) -> OSStatus {
    let query = [
        kSecClass as String       : kSecClassGenericPassword as String,
        kSecAttrAccount as String : key,
        kSecValueData as String   : data ] as [String : Any]

    SecItemDelete(query as CFDictionary)

    return SecItemAdd(query as CFDictionary, nil)
}

Above "Save" function i have written in my custom KeyChainManager class, Also i added below code in KeyChainManager class which is as below.

extension Data {

init<T>(from value: T) {
    var value = value
    self.init(buffer: UnsafeBufferPointer(start: &value, count: 1))
}

func to<T>(type: T.Type) -> T {
    return self.withUnsafeBytes { $0.load(as: T.self) }
}

}

I am saving my data from VC by calling our KeyChainManager class like below:

let email = (txtEmail?.text ?? "").trimmingCharacters(in: .whitespacesAndNewlines)
        let password = (txtPassword?.text ?? "").trimmingCharacters(in: .whitespacesAndNewlines)
        let domain = (txtDomain?.text ?? "").lowercased().trimmingCharacters(in: .whitespacesAndNewlines)
        
        let user = User(email: email, password: password, key: self.key, domain: domain, identifier: self.keyIdentifier)
        let data = (try? JSONEncoder().encode(user)) ?? Data()
        let _ = KeyChain.save(key: "\(self.keyIdentifier)", data: data)

This all stuff is for saving our credentials, Now major point is how to list all saved credentials in our extension's CredentialProviderViewController.swift.

For that i added below method in KeyChainManager class :

class func load(key: String) -> Data? {
    
    let query = [
        kSecClass as String       : kSecClassGenericPassword,
        kSecAttrAccount as String : key,
        kSecReturnData as String  : kCFBooleanTrue!,
        kSecMatchLimit as String  : kSecMatchLimitOne ] as [String : Any]

    var dataTypeRef: AnyObject? = nil

    let status: OSStatus = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)

    if status == noErr {
        return dataTypeRef as! Data?
    } else {
        return nil
    }
}

And calling this function from extension's CredentialProviderViewController.swift like this:

users.removeAll()
    for i in 0..<1000000 {
        if let encodedData = KeyChain.load(key: "\(i)")  {
            let user = try! JSONDecoder().decode(User.self, from: encodedData)
            if user.key == key && ((serviceIdentifier.contains(user.domain ?? "")) ) {
                users.append(user)
            }
        }else{
            break
        }
    }

I hope this content helps you as i spent many days to create just one demo :) :) Comment below, If its helps you :) :)

Thanks, Anjali.

score 0 · Answer 2 · answered Apr 20 '20 at 19:50

0

You need to populate ASCredentialIdentityStore in order for the quicktype bar to work. See the description of ASCredentialProviderViewController:

Optionally add ASPasswordCredentialIdentity instances to the shared ASCredentialIdentityStore to make identities available directly in the QuickType bar.

This is also described in the WWDC presentation you reference.

answered Apr 20 '20 at 19:50

MichaelR

1,681
15
28

Any idea how to populate ASCredentialIdentityStore? I tried: let store = ASCredentialIdentityStore.shared let passwordIdentity = ASPasswordCredentialIdentity(serviceIdentifier: ASCredentialServiceIdentifier(identifier: "chase.com", type: .URL), user: "jbrantl8", recordIdentifier: nil) store.saveCredentialIdentities(identities) { (success, error) in – metamonkey Jul 10 '21 at 03:58
error: Editor placeholder in source file and error: Cannot convert value of type 'ASPasswordCredentialIdentity' to expected argument type '[ASPasswordCredentialIdentity]' – metamonkey Jul 10 '21 at 03:59

score 0 · Answer 3 · answered Mar 29 '22 at 18:44

How I implemented population of ASCredentialIdentityStore:

        var firstItem = ASPasswordCredentialIdentity(serviceIdentifier: ASCredentialServiceIdentifier(identifier: "https://online.somebank.com/auth/login", type: .URL), user: "login@bank.com", recordIdentifier: nil)
    ASCredentialIdentityStore.shared.replaceCredentialIdentities(with: [firstItem]) { result, error in
        if result {
            print("saved")
        }
    }

In my case everything works perfect. So I fetch all passwords from remote and then populate ASCredentialIdentityStore with available passwords.

How to implement AutoFill Credential Provider Extensions - iOS 11, swift4

3 Answers3