Question

我的c＃encrypt / decrypt结构如下：

密码：Rijndael（AES）
块大小：128位（16字节）
模式：CBC（密码块链接）
密钥：MD5哈希密码
IV ：与密钥相同
数据编码：Base64字符
UTF-8编码

我将两个输入的输入Player用作测试，但它没有返回正确的MD5哈希输出，而且我的Decrypt函数也存在小问题byte[] toEncryptArray = Convert.FromBase64String (toDecrypt);。

哈希输出错误和错误

playerID是：加密的玩家是：ZCKgr4veKtCDrD6mL + P6Yg ==
FormatException：长度无效。 System.Convert.FromBase64String （System.String s）（at /Users/builduser/buildslave/monoAndRuntimeClassLibs/build/mcs/class/corlib/System/Convert.cs:146） APIConnector.Decrypt（System.String toDecrypt）（at 资产/ APIConnector.cs：122）

关于我能做些什么的任何想法1）修复此错误和2）根据上面的ym结构得到正确的哈希输出？谢谢！

void submit(){

        Debug.Log ("playerID is: " + firstName + " encrypted is: " + Encrypt(firstName));
        Debug.Log ("password is: " + password + " decrypted is: " + Decrypt(password));

    }


    public static string Encrypt (string toEncrypt)
    {
        byte[] keyArray  = UTF8Encoding.UTF8.GetBytes ("SecretPassphrase");

        // 256-AES key
        byte[] toEncryptArray   = UTF8Encoding.UTF8.GetBytes (toEncrypt);

        RijndaelManaged rDel  = new RijndaelManaged ();
        rDel.Key              = keyArray;
        rDel.IV              = keyArray;
        rDel.Mode             = CipherMode.CBC;
        rDel.BlockSize        = 128;

        // http://msdn.microsoft.com/en-us/library/system.security.cryptography.ciphermode.aspx
        rDel.Padding   = PaddingMode.PKCS7;

        // better lang support
        ICryptoTransform cTransform  = rDel.CreateEncryptor ();

        byte[] resultArray   = cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);

        return Convert.ToBase64String (resultArray, 0, resultArray.Length);
    }

    // 
    public static string Decrypt (string toDecrypt)
    {
        byte[] keyArray  = UTF8Encoding.UTF8.GetBytes ("SecretPassphrase");

        // AES-256 key
        byte[] toEncryptArray   = Convert.FromBase64String (toDecrypt);

        RijndaelManaged rDel  = new RijndaelManaged ();
        rDel.Key              = keyArray;
        rDel.IV              = keyArray;
        rDel.Mode             = CipherMode.CBC;
        rDel.BlockSize        = 128;

        // http://msdn.microsoft.com/en-us/library/system.security.cryptography.ciphermode.aspx
        rDel.Padding    = PaddingMode.PKCS7;

        // better lang support
        ICryptoTransform cTransform  = rDel.CreateDecryptor ();

        byte[] resultArray   = cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);

        return UTF8Encoding.UTF8.GetString (resultArray);
    }

Answer 1

您应该将加密值传递给Decrypt，而不是名字。 Base64转换失败，因为firstname是明确的。

    Debug.Log ("playerID is: " + firstName + " encrypted is: " + Encrypt(firstName));
    Debug.Log ("password is: " + password + " decrypted is: " + Decrypt(firstName));

应该是

string enc = Encrypt(firstName);
Debug.Log ("playerID is: " + firstName + " encrypted is: " + enc);
Debug.Log ("password is: " + password + " decrypted is: " + Decrypt(enc));

Answer 2

您的submit方法没有解密您的加密字符串，它正在尝试解密您未加密的原始字符串。将submit方法更改为以下方法可使程序顺利执行;

static void submit(){
    string password = Encrypt(firstName);
    Console.WriteLine ("playerID is: " + firstName + 
                       " encrypted is: " + password);
    Console.WriteLine ("password is: " + password + 
                       " decrypted is: " + Decrypt(password));
}

另外，由于你实际上并不是MD5的密钥，你很幸运“SecretPassphrase”实际上是16个字符，这是密钥MD5产生的确切长度。更改为更短或更长的字符串将破坏程序。

Rijndael加密/解密输出不正确

2 个答案: