宇文辑录

I simply re-purposed Bobby Derosa’s Triple DES (3DES) Encrypt() and Decrypt() functions to provide a simple and straight-forward way to use AES symmetrical encryption safe for use on such things as UTF-8 and/or HTTP GET string compatibility. I’m using this in ASP.NET AJAX-enabled applications.
<br/>I’m only using a 256bit (32byte) key for these example functions.

Encrypt()

public static string Encrypt(string toEncrypt) {
    byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678901234567890123456789012");
    byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

    RijndaelManaged rDel = new RijndaelManaged();
    rDel.Key = keyArray;
    rDel.Mode = CipherMode.ECB;
    rDel.Padding = PaddingMode.PKCS7;

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

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

Download this code: rijndael.encrypt.cs

Encrypt()

public static string Decrypt(string toDecrypt) {
    byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678901234567890123456789012");
    byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);

    RijndaelManaged rDel = new RijndaelManaged();
    rDel.Key = keyArray;
    rDel.Mode = CipherMode.ECB;
    rDel.Padding = PaddingMode.PKCS7;

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

    return UTF8Encoding.UTF8.GetString(resultArray);
}

Download this code: