ios - 获得CCCryptorStatus“-4310”

我正在做3Des加密和解密。当我调用密码类的加密方法时，我得到CCCryptorStatus“ -4310”
请检查代码，让我知道我在代码中做错了什么

let mdKey = "12345678901234567890123456789012"
    let md = MessageDigest(.md5)
    let keydata = mdKey.data(using: String.Encoding.ascii)
    md.bytes = keydata!.bytes
    md.data = NSMutableData.init(data: keydata ?? Data())
    let result = md.final()
    print(result)


  let objCipher = Cipher(algorithm: Cipher.Algorithm.tripleDES, options: [.ECBMode,.PKCS7Padding])
    do{
        let encription = try objCipher.encrypt(messageData!.bytes, key: keydata!.bytes)
        print(encription)
    }catch let errorMessage{
        print(errorMessage)
    }

//密码类方法//

public func encrypt(_ data: Data, key: Key) throws -> [UInt8] {
    return try cryptoOperation(data, key: key, operation: .encrypt)
}

 public func decrypt(_ data: Data, key: Key) throws -> [UInt8] {
    return try cryptoOperation(data, key: key, operation: .decrypt)
}

fileprivate func cryptoOperation(_ data: Data, key: Key, operation: Operation) throws -> [UInt8] {
    var dataOutMoved = 0
    var outData = [UInt8](repeating: UInt8(0), count: Int(data.count + self.algorithm.blockSize))
    let ivData = "iv-salt-string--".data(using: String.Encoding.ascii)//self.iv == nil ? nil : UnsafeRawPointer(self.iv!)
    let status = CCCrypt(operation.rawValue, // operation
        self.algorithm.rawValue, // algorithm
        self.options.rawValue, // options
        key, // key
        key.count, // keylength
        ivData!.bytes, // iv
        data, // input data
        data.count, // input length
        &outData, // output buffer
        outData.count, // output buffer length
        &dataOutMoved) // output bytes real length
    if status == CCCryptorStatus(kCCSuccess) {
        return Array(outData[0..<dataOutMoved])
    } else {
        throw SCryptoError(rawValue: status)!
    }
}

最佳答案

-4310是kCCKeySizeError。看起来您正在传递MD5输出作为密钥。 MD5产生128位哈希。 3DES需要168位，112位或56位密钥。因此存在不匹配。我希望您正在使用3DES的事实表明您正在维护与某些非常旧的系统的兼容性（如果不兼容，请停止使用3DES）。您将需要探索旧系统如何管理其密钥。您不符合该系统另一端的要求。