Sigh, I have been working on this the whole afternoon... here is my nightmare:
I am trying to use the KeychainItemWrapper made by Apple. But I "translated" its Objective-C codes to Swift:
import Foundation
import Security
class MyKeychainItemWrapper: NSObject {
var keychainItemData: NSMutableDictionary?
var genericPasswordQuery: NSMutableDictionary = NSMutableDictionary()
init(identifier: String, accessGroup: String?) {
super.init()
// Begin Keychain search setup. The genericPasswordQuery leverages the special user
// defined attribute kSecAttrGeneric to distinguish itself between other generic Keychain
// items which may be included by the same application.
genericPasswordQuery.setObject(kSecClassGenericPassword, forKey: kSecClass)
genericPasswordQuery.setObject(identifier, forKey: kSecAttrGeneric)
// The keychain access group attribute determines if this item can be shared
// amongst multiple apps whose code signing entitlements contain the same keychain access group.
println(accessGroup)
if (!(accessGroup == nil)) {
genericPasswordQuery.setObject(accessGroup!, forKey: kSecAttrAccessGroup)
}
// Use the proper search constants, return only the attributes of the first match.
genericPasswordQuery.setObject(kSecMatchLimitOne, forKey: kSecMatchLimit)
genericPasswordQuery.setObject(kCFBooleanTrue, forKey: kSecReturnAttributes)
var tempQuery: NSDictionary = NSDictionary(dictionary: genericPasswordQuery)
var outDictionary: Unmanaged<AnyObject>? = nil
var status: OSStatus = SecItemCopyMatching(tempQuery as CFDictionaryRef, &outDictionary)
println(status == noErr)
if (status == noErr) {
// Stick these default values into keychain item if nothing found.
resetKeychainItem()
// Add the generic attribute and the keychain access group.
keychainItemData!.setObject(identifier, forKey: kSecAttrGeneric)
if (!(accessGroup == nil)) {
keychainItemData!.setObject(accessGroup!, forKey: kSecAttrAccessGroup)
}
} else {
// load the saved data from Keychain.
keychainItemData = secItemFormatToDictionary(outDictionary?.takeRetainedValue() as NSDictionary)
}
}
Then in my app's AppDelegate.swift, I am trying to use it by:
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var passwordItem: MyKeychainItemWrapper = MyKeychainItemWrapper(identifier: "Password", accessGroup: nil)
...
So, the initializer is called, but but but somehow, I ALWAYS, ALWAYS get
Thread 1: EXC_BREAKPOINT (code=EXC_ARM_BREAKPOINT, subcode=0xe7ffdefe)
I have tried commenting out the problem lines and then I get this error at another if():
I even tried:
var mmm: Bool = (accessGroup == nil)
if (!mmm) {
genericPasswordQuery.setObject(accessGroup!, forKey: kSecAttrAccessGroup)
}
But same error at the same place, i.e. if(..)
I am now so confused. Did I miss something here or?
Environment: Xcode6-beta6, iOS 8 beta 5 on a non-jailbroken iPhone 5.
Updates for Swift 2.
Here is an example implementation that may help.:
Output:
Swift 3
Swift 2
Then from anywhere simply call:
official is GenericKeychain
existing several swift version, the best one is:
jrendel/SwiftKeychainWrapper · GitHub
how to use it:
write code to set/get/delete:
My solution seems working:
The only thing I did is to unwrap the outDictionary immediately after getting it.