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Cryptographer.cs
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Cryptographer.cs
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// Rainbows, an experimental backend for SparkleShare
// Copyright (C) 2011 Hylke Bons <hylkebons@gmail.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Security.Cryptography;
using System.Text;
namespace Rainbows {
public class Cryptographer {
private RijndaelManaged aes = new RijndaelManaged () {
KeySize = 256,
BlockSize = 128,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7
};
public Cryptographer (string password)
{
this.aes.IV = Convert.FromBase64String (password);
this.aes.Key = Convert.FromBase64String (password);
}
public byte [] Encrypt (byte [] buffer)
{
ICryptoTransform crypto = this.aes.CreateEncryptor ();
return crypto.TransformFinalBlock (buffer, 0, buffer.Length);
}
public byte [] Decrypt (byte [] buffer)
{
ICryptoTransform crypto = this.aes.CreateDecryptor ();
return crypto.TransformFinalBlock (buffer, 0, buffer.Length);
}
// Creates a SHA-1 hash of input
public static string SHA1 (byte [] buffer)
{
SHA1 sha1 = new SHA1CryptoServiceProvider ();
byte [] encoded_bytes = sha1.ComputeHash (buffer);
return BitConverter.ToString (encoded_bytes).ToLower ().Replace ("-", "");
}
}
}