AES在T-SQL中的c#decrypt中加密

时间:2015-04-27 19:11:07

标签: c# sql-server tsql encryption cryptography

我编写了以下代码来解密一些敏感数据,在大多数情况下我需要使用T-SQL查询数据,我无法解密由此代码加密的数据。所以我的问题是如何在T-SQL中编写一个函数,其工作方式与在C#中工作的方式相同,我将在存储过程中使用它。

先谢谢

加密功能:

public static string Encrypt(string text)
    {
        if (string.IsNullOrEmpty(EncryptionKey))
            return string.Empty;
        if (string.IsNullOrEmpty(text))
            return string.Empty;
        var clearBytes = Encoding.Unicode.GetBytes(text);
        using (var encryptor = Aes.Create())
        {
            var pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[]
            {
                0x49,
                0x76,
                0x61,
                0x6e,
                0x20,
                0x4d,
                0x65,
                0x64,
                0x76,
                0x65,
                0x64,
                0x65,
                0x76
            });
            encryptor.Key = pdb.GetBytes(32);
            encryptor.IV = pdb.GetBytes(16);
            using (var ms = new MemoryStream())
            {
                using (var cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(clearBytes, 0, clearBytes.Length);
                }
                text = Convert.ToBase64String(ms.ToArray());
            }
        }
        return text;
    }

解密功能:

public static string Decrypt(string text)
    {
        if (string.IsNullOrEmpty(EncryptionKey))
            return string.Empty;
        if (string.IsNullOrEmpty(text))
            return string.Empty;
        var cipherBytes = Convert.FromBase64String(text);
        using (var encryptor = Aes.Create())
        {
            var pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[]
            {
                0x49,
                0x76,
                0x61,
                0x6e,
                0x20,
                0x4d,
                0x65,
                0x64,
                0x76,
                0x65,
                0x64,
                0x65,
                0x76
            });
            encryptor.Key = pdb.GetBytes(32);
            encryptor.IV = pdb.GetBytes(16);
            using (var ms = new MemoryStream())
            {
                using (var cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(cipherBytes, 0, cipherBytes.Length);
                }
                text = Encoding.Unicode.GetString(ms.ToArray());
            }
        }
        return text;
    }

1 个答案:

答案 0 :(得分:3)