ASP.NET Rijndael Decrypt-要解密的数据长度

到目前为止,我发现很多东西都有点含糊不清,或者…不具体,所以我希望得到答案。

我有两个小方法-看起来很简单的方法…

    private const string initVector = "1234567890123456";
    private const string SaltValue = "ThisIsMySaltValue";
    private const int KeySize = 256;

    public static string Encrypt(string textToEncrypt)
    {
        var rijndael = new RijndaelManaged {KeySize = KeySize};
        var salt = SaltValue.ToByteArray();
        var vector = initVector.ToByteArray();

        var rfcBytes = new Rfc2898DeriveBytes(vector, salt, 2);
        var key = rfcBytes.GetBytes(rijndael.KeySize/8);

        ICryptoTransform encrypt = rijndael.CreateEncryptor(key, vector);

        var stream = new MemoryStream();
        var data = Encoding.ASCII.GetBytes(textToEncrypt);
        stream.Write(data, 0, data.Length);

        var cryptoStream = new CryptoStream(stream, encrypt, CryptoStreamMode.Write);
        cryptoStream.Write(data, 0, data.Length);
        cryptoStream.FlushFinalBlock();

        cryptoStream.Close();
        return Convert.ToBase64String(stream.ToArray());
    }


    public static string Decrypt(string textToDecrypt)
    {
        var vector = initVector.ToByteArray();
        var salt = SaltValue.ToByteArray();
        var encrypted = textToDecrypt.ToByteArray();

        var rijndael = new RijndaelManaged {KeySize = KeySize};

        var rfcBytes = new Rfc2898DeriveBytes(vector, salt, 2);
        var key = rfcBytes.GetBytes(rijndael.KeySize/8);

        var decrypt = rijndael.CreateDecryptor(key, vector);

        var stream = new MemoryStream(encrypted);
        var cryptoStream = new CryptoStream(stream, decrypt, CryptoStreamMode.Read);

        byte[] plainBytes = new byte[textToDecrypt.Length];

        var decryptedLength = cryptoStream.Read(plainBytes, 0, plainBytes.Length);

        var plainText = Encoding.UTF8.GetString(plainBytes, 0, decryptedLength);
        return plainText;
    }

单元测试看起来像这样…

    [Test]
    public void JustTestingThisOut()
    {
        var encryptMe = "SomethingToEncrypt";
        string result = encryptMe.ConvertToEncrypted();
        result.ShouldNotEqual(encryptMe);
        string backToReadAble = result.ConvertToDecrpted();
        backToReadAble.ShouldEqual(encryptMe);
    }

tobytearray只做一个返回编码。utf8.getbytes(tobyte);我的测试字符串很简单-“somethingtoencrypt”。我到兔子洞里去寻找 this 认为这可能是一个问题(convert.tobase64string和convert.frombase64string),但似乎没有什么区别。至于错误…

测试用例 'tests.encryption.encryptionunittests.justtestingthesiout' 失败: System.Security.Cryptography.Cryptographic例外 :要解密的数据长度为 无效。在 System.Security.Cryptography.RijndaelManagedTransform.TransformFinalBlock(字节[] 输入缓冲区,Int32输入缓冲区,Int32 输入计数)

我把flushfinalblock()放在里面,我以为可以,但是……不,也没什么区别。有什么想法吗?要尝试的东西?