public CipherData Load()
{
CipherData data = new CipherData();
using (FileStream fs = File.OpenRead(_FileName))
{
byte x = (byte) fs.ReadByte();
byte[] b = new byte[x];
fs.Read(b, 0, b.Length);
data.InitializationVector = b;
x = (byte) fs.ReadByte();
b = new byte[x];
fs.Read(b, 0, b.Length);
data.Passphrase = System.Text.Encoding.ASCII.GetString(b);
x = (byte) fs.ReadByte();
b = new byte[x];
fs.Read(b, 0, b.Length);
data.Salt= b;
b = new byte[(int)(fs.Length - fs.Position)];
fs.Read(b, 0, b.Length);
data.CipherText = b;
}
return data;
}
public void Save(CipherData data)
{
File.Delete(FileName);
using (FileStream fs = File.OpenWrite(_FileName))
{
fs.WriteByte((byte)data.InitializationVector.Length);
fs.Write(data.InitializationVector, 0, data.InitializationVector.Length);
byte[] b = System.Text.Encoding.ASCII.GetBytes(data.Passphrase);
fs.WriteByte((byte)b.Length);
fs.Write(b, 0, b.Length);
fs.WriteByte((byte)data.Salt.Length);
fs.Write(data.Salt, 0, data.Salt.Length);
fs.Write(data.CipherText, 0, data.CipherText.Length);
}
}
private void btnSave_Click(object sender, System.EventArgs e)
{
if ((LastEncrypted != null) && (LastEncrypted.Length != 0))
{
CipherData cd = new CipherData();
cd.Salt = this.Salt;
cd.Passphrase = txtPassPhrase.Text;
cd.InitializationVector = HexStringToByteArray(txtInitVector.Text);
cd.CipherText = LastEncrypted;
store.Save(cd);
AppendStatus(System.String.Format("{0} bytes saved in {1} ({2} crypto bytes).\r\n",
cd.GetLength(),
store.FileName,
cd.CipherText.Length)
);
}
}