Bag Labs Post - Keychain and Swift -

Load.swift

func load(service: NSString, userName:String) -> NSString?
{
    //Create the query keychain
    var keychainQuery: NSMutableDictionary = NSMutableDictionary(objects: [kSecClassGenericPasswordValue, service, userName, kCFBooleanTrue, kSecMatchLimitOneValue], forKeys: [kSecClassValue, kSecAttrServiceValue, kSecAttrAccountValue, kSecReturnDataValue, kSecMatchLimitValue])
 
    var dataTypeRef :Unmanaged<AnyObject>?
    // Search for the keychain items
    let status: OSStatus = SecItemCopyMatching(keychainQuery, &dataTypeRef)
    let opaque = dataTypeRef?.toOpaque()
    var contentsOfKeychain: NSString?
 
    if let op = opaque
    {
        let retrievedData = Unmanaged<NSData>.fromOpaque(op).takeUnretainedValue()
        // Convert the data retrieved from the keychain into a string
        contentsOfKeychain = NSString(data: retrievedData, encoding: NSUTF8StringEncoding)
    }
    else
    {
        println("Nothing was retrieved from the keychain. Status code \(status)")
    }
 
    return contentsOfKeychain
}