Question

我一直收到System.Security.Cryptography.CryptographicException：“填充无效，无法删除。”尽管在许多其他堆栈溢出页面中连续搜索了数小时，但我仍然无法使它正常工作。

public static byte[] encrypt(String someString)
    {
        byte[] encrypted;

        using (AesManaged theAes = new AesManaged())
        {
            theAes.Key = stringToByteArray("dd0ecb45c37b2fa02f7d924de0e48301"); //You may replace this key with any AES 128-bit key

            byte[] IV = new byte[] { 126, 182, 142, 1, 77, 79, 233, 113, 245, 119, 111, 19, 124, 160, 120, 17 }; //You may replace this with your own IV

            theAes.IV = IV;

            var encryptor = theAes.CreateEncryptor(theAes.Key, theAes.IV);

            using (var mem = new MemoryStream())
            {
                using (var crypto = new CryptoStream(mem, encryptor, CryptoStreamMode.Write))
                {
                    using (var sWriter = new StreamWriter(crypto))
                    {
                        sWriter.Write(someString);
                        crypto.FlushFinalBlock();
                    }
                    encrypted = mem.ToArray();
                }
            }
        }
        return encrypted;
    }

    public static byte[] stringToByteArray(String hex)
    {
        int hexLength = hex.Length;
        byte[] bytes = new byte[hexLength / 2];
        for (int i = 0; i < hexLength; i += 2)
            bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
        return bytes;
    }

    public static string decrypt(byte[] cipherText)
    {
        string decrypted;

        using (AesManaged aesAlg = new AesManaged())
        {
            aesAlg.Key = stringToByteArray("[Insert Key in string form here]"); //You may replace this key with any AES 128-bit key

            byte[] IV = new byte[] { [Insert something here] }; //You may replace this with your own IV

            aesAlg.IV = IV;

            var decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);

            using (var msDecrypt = new MemoryStream(cipherText))
            {
                using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                {
                    using (var srDecrypt = new StreamReader(csDecrypt))
                    {
                        decrypted = srDecrypt.ReadToEnd();
                    }
                }
            }
        }
        return decrypted;
    }

这就是我用于客户端服务器应用程序的加密tcp连接的方式。请帮忙！我不想使用ssl，所以请不要告诉我。

更新：所以有人说这是重复的，但事实并非如此。我尝试返回基数为64的字符串而不是字节数组，但在同一行代码中仍遇到相同的错误，即“ decrypted = srDecrypt.ReadToEnd（）;”

System.Security.Cryptography.CryptographicException：填充无效，无法删除。

0 个答案: