/// <summary>
/// One-way transformation. The spec says that the password must be
/// padded with blanks, Samba does it iwth 0 ???
/// <para>OWF = Ex(P14, S8)</para>
/// </summary>
/// <param name = "password">password</param>
/// <returns>byte[16]</returns>
internal static byte[] GetLmOwf(string password)
{
var p14 = new byte[14];
password = password.ToUpper();
for (int i = 0; i < password.Length; i++)
{
p14[i] = (byte)(password[i] & 0xff);
}
var s16 = new byte[16];
var key7 = new byte[7];
var key8 = new byte[8];
var e8 = new byte[8];
for (int i = 0; i < 2; i++)
{
Array.Copy(p14, 7 * i, key7, 0, 7);
Des.MakeSmbKey(key7, key8);
var des = new Des(key8);
des.Encrypt(S8, e8);
Array.Copy(e8, 0, s16, 8 * i, 8);
}
return(s16);
}
private static void E_P16(byte[] p14, byte[] p16)
{
var key7 = new byte[7];
var key8 = new byte[8];
var e8 = new byte[8];
for (int i = 0; i < 2; i++)
{
Array.Copy(p14, 7 * i, key7, 0, 7);
Des.MakeSmbKey(key7, key8);
var des = new Des(key8);
des.Encrypt(S8, e8);
Array.Copy(e8, 0, p16, 8 * i, 8);
}
}
private static void E_P24(byte[] p21, byte[] c8, byte[] p24)
{
var key7 = new byte[7];
var key8 = new byte[8];
var e8 = new byte[8];
for (int i = 0; i < 3; i++)
{
Array.Copy(p21, 7 * i, key7, 0, 7);
Des.MakeSmbKey(key7, key8);
var des = new Des(key8);
des.Encrypt(c8, e8);
Array.Copy(e8, 0, p24, 8 * i, 8);
}
}
/// <summary>
/// Encrypts password
/// </summary>
/// <param name = "s21">Session key</param>
/// <param name = "c8">challange</param>
/// <returns>byte[24]</returns>
internal static byte[] GetAuthData(byte[] s21, byte[] c8)
{
var key7 = new byte[7];
var key8 = new byte[8];
var e8 = new byte[8];
var rn = new byte[24];
for (int i = 0; i < 3; i++)
{
Array.Copy(s21, 7 * i, key7, 0, 7);
Des.MakeSmbKey(key7, key8);
var des = new Des(key8);
des.Encrypt(c8, e8);
Array.Copy(e8, 0, rn, 8 * i, 8);
}
return(rn);
}
private static byte[] GetOldPwHash(byte[] p14key, byte[] in16)
{
var s16 = new byte[16];
var key7 = new byte[7];
var key8 = new byte[8];
var e8 = new byte[8];
var s8 = new byte[8];
for (int i = 0; i < 2; i++)
{
Array.Copy(p14key, 7 * i, key7, 0, 7);
Des.MakeSmbKey(key7, key8);
var des = new Des(key8);
Array.Copy(in16, 8 * i, s8, 0, 8);
des.Encrypt(s8, e8);
Array.Copy(e8, 0, s16, 8 * i, 8);
}
return(s16);
}