I recently had to do some simple encryption and decryption for password storage. I wanted to document this so a blog entry seemed in order. So without any yammering here’s the simple class I created.
public static class EncryptionHelper
{
private const string CryptographyKey = "CryptKey";
// The Initialization Vector for the DES encryption routine
private static readonly byte[] iv =
new byte[] { 220, 13, 41, 29, 1, 63, 73, 9 };
/// <summary>
/// Encrypts provided string parameter
/// </summary>
public static string Encrypt(string s)
{
if (string.IsNullOrEmpty(s)) return string.Empty;
byte[] buffer = Encoding.ASCII.GetBytes(s);
var des = new TripleDESCryptoServiceProvider();
var md5 = new MD5CryptoServiceProvider();
des.Key = md5.ComputeHash(Encoding.ASCII.GetBytes(CryptographyKey));
des.IV = iv;
string result = Convert.ToBase64String(
des.CreateEncryptor().TransformFinalBlock(
buffer, 0, buffer.Length));
return result;
}
/// <summary>
/// Decrypts provided string parameter
/// </summary>
public static string Decrypt(string s)
{
if (string.IsNullOrEmpty(s)) return string.Empty;
byte[] buffer = Convert.FromBase64String(s);
var des = new TripleDESCryptoServiceProvider();
var md5 = new MD5CryptoServiceProvider();
des.Key = md5.ComputeHash(Encoding.ASCII.GetBytes(CryptographyKey));
des.IV = iv;
string result = Encoding.ASCII.GetString(
des.CreateDecryptor().TransformFinalBlock(
buffer, 0, buffer.Length));
return result;
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, “Courier New”, courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
So simple enough. Hope that is helpful to anyone interested in a super easy encrypt & decrypt example. : )
