如何在Swift中从加密的JSON字符串中提取某些字段？

我正在将Apple Pay整合到我的应用程序中。我有一个用Java编写的服务，它实际上将从我的iOS应用程序发送的加密blob解密并将其发回。如何在Swift中从加密的JSON字符串中提取某些字段？

我这里面临两个问题：

更大的问题 - 我的服务仅消耗XML有效载荷，因此我需要将JSON有效载荷转换为XML有效载荷在我iOS应用程序，它我不知道该怎么办。
小问题 - 我试图从这个加密的JSON有效载荷中提取字段，并在控制台上打印出来。

实施例：

let jsonBody = payment.token.paymentData 
print("jsonBody = \(jsonBody)") !!! WORKS (prints encrypted data) !!!

然而，我不能够提取存在于paymentData词典按下面的链接 https://developer.apple.com/library/ios/documentation/PassKit/Reference/PaymentTokenJSON/PaymentTokenJSON.html

实施例的其它参数：

let paymentDataDict:[String:String] = payment.token.paymentData 
for (key, value) in paymentDataDict { 
    print("Dictionary key \(key) - Dictionary value \(value)") 
} 

Error: Cannot convert value of type 'NSData' to specified type '[String : String]'

来源：

/* 
    * This is the first method to be called by the passkit framework once the encrypted blob is received from the apple server. 
    * Our implementation of the call back function below is calling payment service to decrypt the encrypted blob. 
    * It then proceeds to call processPayment method to send this data down to payment service for authorization. 
    */ 
    func paymentAuthorizationViewController(controller: PKPaymentAuthorizationViewController, didAuthorizePayment payment: PKPayment, completion: (PKPaymentAuthorizationStatus) -> Void) { 
     let decryptUrl = NSURL(string: "http://lvsdevwsv04-01.us.gspt.net:1801/public-api-service/v1.0/stores/TMSUS/payments/decryptblob.xml") // Decryption URL 
     let decryptRequest = NSMutableURLRequest(URL: decryptUrl!) 
     decryptRequest.HTTPMethod = "POST" 
     decryptRequest.setValue("application/json", forHTTPHeaderField: "Content-Type") 
     decryptRequest.setValue("application/json", forHTTPHeaderField: "Accept") 
     let jsonBody = payment.token.paymentData 
     print("jsonBody = \(jsonBody)") 

     //ERROR IN THE BELOW LINE 
     let paymentDataDict:[String:String] = payment.token.paymentData 
     for (key, value) in paymentDataDict { 
      print("Dictionary key \(key) - Dictionary value \(value)") 
     } 

     decryptRequest.HTTPBody = jsonBody 
     let task = NSURLSession.sharedSession().dataTaskWithRequest(decryptRequest) {data, response, error in 
      guard error == nil && data != nil else { 
       print("error=\(error)") 
       return 
      } 
      if let httpStatus = response as? NSHTTPURLResponse where httpStatus.statusCode != 200 { 
       print("statuscode should be 200, but is \(httpStatus.statusCode)") 
       print("response = \(response)") 
      } else { 
       let responseString = NSString(data: data!, en 

    //code removed for brevity

来源

2016-08-24 user2325154

我终于能够在控制台上打印加密的字符串后，将其转换为NSString对象。这里是一些小的变化后为我工作的代码片段。

let encryptedPaymentData = payment.token.paymentData 
    let paymentMethod = payment.token.paymentMethod 
    let txId = payment.token.transactionIdentifier 
    print("paymentMethod = \(paymentMethod)") 
    print("txId = \(txId)") 
    let decryptedPaymentData:NSString! = NSString(data: encryptedPaymentData, encoding: NSUTF8StringEncoding) 
    print("decryptedPaymentData = \(decryptedPaymentData)")

来源

2016-08-25 15:27:25 user2325154

如何在Swift中从加密的JSON字符串中提取某些字段？

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