使用CryptoSwift在iOS中加密/解密字符串

Question

我尝试加密字符串，然后使用CryptoSwift将其解密。这是代码：

    let key: [UInt8] = [0x2b,0x7e,0x15,0x16,0x28,0xae,0xd2,0xa6,0xab,0xf7,0x15,0x88,0x09,0xcf,0x4f,0x3c]
    let iv: [UInt8] = [0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F]

    let message = "Hello there!".dataUsingEncoding(NSUTF8StringEncoding)!.arrayOfBytes()
    do {
        let encryptedBytes = try ChaCha20(key: key, iv: iv)!.encrypt(message)
        let decryptedBytes = try ChaCha20(key: key, iv: iv)!.decrypt(encryptedBytes)
        let data = NSData.withBytes(decryptedBytes)
        let decrypted = String(data: data, encoding: NSUTF8StringEncoding)

        print(decrypted) // this should print "Hello there!", but it doesn't
    }
    catch { ... }

我认为这应该打印出原始字符串"Hello there!"。但我得到了这个：(<48656c6c 6f207468 65726521>, 4)

任何想法我做错了什么？

Answer 1

我想出来了。改变了这一行：

let decrypted = String(data: data, encoding: NSUTF8StringEncoding)

为：

let decrypted = String(bytes: decryptedBytes, encoding: NSUTF8StringEncoding)

它现在正在运作。