CFDictionaryCreate Abstürze in Xcode 8 swift 3

Question

Ich habe den folgenden Code für das Abrufen und Speichern von RSAkeydata

fileprivate func retrieveAndStoreRSAKeyData(isPublic: Bool) throws -> CFData { 

    var resultCode = noErr 
    var result: CFData 
    let value = { 
     if isPublic { 
      let t = self.publicTag 
      print(t) 
     } 
     else 
     { 
      let s = self.privateTag 
      print(s) 
     } 
    } 
    var keyCallbacks = kCFTypeDictionaryKeyCallBacks 
    var valueCallbacks = kCFTypeDictionaryValueCallBacks 
    let keys = [Unmanaged.passUnretained(kSecClass).toOpaque(), Unmanaged.passUnretained(kSecAttrApplicationTag).toOpaque(), Unmanaged.passUnretained(kSecAttrKeyType).toOpaque(), Unmanaged.passUnretained(kSecReturnData).toOpaque()] 
    let values = [Unmanaged.passUnretained(kSecClassKey).toOpaque(), Unmanaged<AnyObject>.passUnretained(value as AnyObject).toOpaque(), Unmanaged.passUnretained(kSecAttrKeyTypeRSA).toOpaque(), Unmanaged.passUnretained(kCFBooleanTrue).toOpaque()] 
    let queryKey = CFDictionaryCreate(kCFAllocatorDefault,UnsafeMutablePointer.allocate(capacity: keys.count),UnsafeMutablePointer.allocate(capacity: values.count), 4, &keyCallbacks, &valueCallbacks) 

    // Get the key. 
    var item: AnyObject? 
    resultCode = SecItemCopyMatching(queryKey!, &item) 

    if(resultCode != noErr) { 

     try generateKeyPair() 
     /* 
     Recurcively call the retrieval again after keys have been generated 
     */ 
     result = try retrieveAndStoreRSAKeyData(isPublic: isPublic) 
    } 
    else { 

     result = item as! CFData 
    } 

    return result 
} 

Die CFDictionaryCreate immer und Code-Abstürze in dieser Zeile nicht in

 let queryKey = CFDictionaryCreate(kCFAllocatorDefault,UnsafeMutablePointer.allocate(capacity: keys.count),UnsafeMutablePointer.allocate(capacity: values.count), 4, &keyCallbacks, &valueCallbacks) 

Kann mir jemand helfen darauf. Vielen Dank im Voraus

Answer 1

ein Schlüsselpaar erzeugen

func generateKeyPair(_ publicTag: String, privateTag: String, keySize: Int)->Bool { 
     let privateAttributes = [String(kSecAttrIsPermanent): true, 
           String(kSecAttrApplicationTag): privateTag] as [String : Any] 
     let publicAttributes = [String(kSecAttrIsPermanent): true, 
           String(kSecAttrApplicationTag): publicTag] as [String : Any] 

     let pairAttributes = [String(kSecAttrKeyType): kSecAttrKeyTypeRSA, 
           String(kSecAttrKeySizeInBits): keySize, 
           String(kSecPublicKeyAttrs): publicAttributes, 
           String(kSecPrivateKeyAttrs): privateAttributes] as [String : Any] 

     var publicRef: SecKey? 
     var privateRef: SecKey? 
     switch SecKeyGeneratePair(pairAttributes as CFDictionary, &publicRef, &privateRef) { 
     case noErr: return true 
     default: return false 
     } 
    } 

und einige Hilfsfunktionen

func obtainKey(_ tag: String) -> SecKey? { 
    var keyRef: AnyObject? 
    let query: Dictionary<String, AnyObject> = [ 
     String(kSecAttrKeyType): kSecAttrKeyTypeRSA, 
     String(kSecReturnRef): kCFBooleanTrue as CFBoolean, 
     String(kSecClass): kSecClassKey as CFString, 
     String(kSecAttrApplicationTag): tag as CFString, 
     ] 

    let status = SecItemCopyMatching(query as CFDictionary, &keyRef) 

    switch status { 
    case noErr: 
     if let ref = keyRef { 
      return (ref as! SecKey) 
     } 
    default: 
     break 
    } 

    return nil 
} 

func obtainKeyData(_ tag: String) -> Data? { 
    var keyRef: AnyObject? 
    let query: Dictionary<String, AnyObject> = [ 
     String(kSecAttrKeyType): kSecAttrKeyTypeRSA, 
     String(kSecReturnData): kCFBooleanTrue as CFBoolean, 
     String(kSecClass): kSecClassKey as CFString, 
     String(kSecAttrApplicationTag): tag as CFString, 
     ] 

    let result: Data? 

    switch SecItemCopyMatching(query as CFDictionary, &keyRef) { 
    case noErr: 
     result = keyRef as? Data 
    default: 
     result = nil 
    } 

    return result 
} 

func insertPublicKey(_ publicTag: String, data: Data) -> SecKey? { 
    let query: Dictionary<String, AnyObject> = [ 
     String(kSecAttrKeyType): kSecAttrKeyTypeRSA, 
     String(kSecClass): kSecClassKey as CFString, 
     String(kSecAttrApplicationTag): publicTag as CFString, 
     String(kSecValueData): data as CFData, 
     String(kSecReturnPersistentRef): true as CFBoolean] 

    var persistentRef: AnyObject? 
    let status = SecItemAdd(query as CFDictionary, &persistentRef) 

    if status != noErr && status != errSecDuplicateItem { 
     return nil 
    } 

    return obtainKey(publicTag) 
} 

func deleteKey(_ tag: String) -> Bool { 
    let query: Dictionary<String, AnyObject> = [ 
     String(kSecAttrKeyType): kSecAttrKeyTypeRSA, 
     String(kSecClass): kSecClassKey as CFString, 
     String(kSecAttrApplicationTag): tag as CFString] 

    return SecItemDelete(query as CFDictionary) == noErr 
} 

func updateKey(_ tag: String, data: Data) -> Bool { 
    let query: Dictionary<String, AnyObject> = [ 
     String(kSecAttrKeyType): kSecAttrKeyTypeRSA, 
     String(kSecClass): kSecClassKey as CFString, 
     String(kSecAttrApplicationTag): tag as CFString] 

    return SecItemUpdate(query as CFDictionary, [String(kSecValueData): data] as CFDictionary) == noErr 
}