ios - 崩溃 : AES128 encryption in iOS 10 using Swift 2. 1

Question

我正在使用AES128 加密。以下是我使用的代码:

. . .
let encJson : String = response.objectForKey("data") as! String

let encryptionKey : String = “some key here”

//Crash on this line
response = EncryptionAndConversion.sharedInstance.converEncDataToStringWithAES128(encJson, key: encryptionKey)

print("response : \(response)")
. . .

func converEncDataToStringWithAES128(message:String, key myKey:String) -> NSDictionary {

        let data = NSData(base64EncodedString: message, options: NSDataBase64DecodingOptions(rawValue: 0))

        //The value of result comes nil
        let result = NSString(data: (data?.AES128DecryptedDataWithKey(myKey))!, encoding: NSUTF8StringEncoding)

        return convertStringToDictionary(result!)
    }

可能是什么原因？我在 converEncDataToStringWithAES128(..) 函数上崩溃，原因是 fatal error :在展开可选值时意外发现 nil

我已经交叉验证消息和 key 没有问题。

如有任何帮助，我们将不胜感激!

Answer 1

不是答案，但这也会崩溃吗？

let encJson : String = response.objectForKey("data") as! String

到:

guard let encJson = response.objectForKey("data") as? String {
    print("data is not a String")
    return
}