Question

其他链接对我没用。我在保存在mysql数据库之前加密字符串。这工作正常。但是当我想要检索时，它给我加密的数据长度是无效的错误。在我的加密要求之前，我使用的是varchar大小为500的数据类型。现在我使用大小为800的varbinary.can any1也告诉我大小吗？

加密方法：

public static byte[] encryptStringToBytes(string plainText)
    {
        byte[] encrypted;
        //create an Rijndael object
        using (Rijndael rijAlg = Rijndael.Create())
        {
            //create a decrytor to perform the stream transform.
            ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);

            //create the streams used for encryption.
            using (MemoryStream msEncrypt = new MemoryStream())
            {
                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                {
                    using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                    {
                        //Write all data to the stream.
                        swEncrypt.Write(plainText);
                    }
                    encrypted = msEncrypt.ToArray();
                }
            }
        }

        return encrypted;
    }

解密方法：

        public static string decryptStringFromBytes(byte[] cipherText)
    {
        string plaintext = null;

        //create an Rijndael object
        using (Rijndael rijAlg = Rijndael.Create())
        {
            //create a decrytor to perform the stream transform.
            ICryptoTransform decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);

            //create the streams used for decryption.
            using (MemoryStream msDecrypt = new MemoryStream(cipherText))
            {
                using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                {
                    using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                    {
                        //read the decrypted bytes from the decrypting stream and place them in a string.
                        plaintext = srDecrypt.ReadToEnd();
                    }
                }
            }
        }
        return plaintext;
    }

从结果集中检索

                    using (Rijndael myRijndael = Rijndael.Create())
                {
                    temp5 = EncryptDecrypt.decryptStringFromBytes((byte[])reader.GetValue(reader.GetOrdinal("Body")));
                }

Answer 1

您无法以任何方式控制键和IV。这是一个问题... :)它导致您的加密是随机加扰数据，因为密钥和IV由框架随机初始化。

使用相同的密钥和IV进行解密，就像使用它们进行加密一样。为什么你认为数据库与问题有关？它没有，也没有证据证明这一点。

使用rijndael加密技术解密的数据长度无效

1 个答案: