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[C#] Xval Decryption Class
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[C#] Xval Decryption ClassPosted:
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Joined: Jun 12, 201013Year Member
Posts: 531
Reputation Power: 33
Stumbled upon this over at [ Register or Signin to view external links. ] and decided to port it to C# today.
If you use this, PLEASE give credits to Redline99 for his work. He's an awesome guy and deserves the recognition.
Note, I haven't tested it with a bad Xval since I don't have any Xboxes that are flagged or whatnot, but it should work just fine.
If you aren't familiar with Xval, read this [ Register or Signin to view external links. ]
[ Register or Signin to view external links. ]
or...
If you use this, PLEASE give credits to Redline99 for his work. He's an awesome guy and deserves the recognition.
Note, I haven't tested it with a bad Xval since I don't have any Xboxes that are flagged or whatnot, but it should work just fine.
If you aren't familiar with Xval, read this [ Register or Signin to view external links. ]
[ Register or Signin to view external links. ]
or...
/* Xval Decrypter class written (ported) by CLK
* Original code by Redline99 http://www.xboxhacker.org/index.php?topic=16401.msg125000#msg125000
* Big thanks to him for all he's done for everyone in the Xbox scene
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
namespace Xval_Decrypt
{
public static class Xval
{
public static uint[] Decrypt(string xval, string Serial)
{
// Remove formatting
xval = xval.Replace("-", "");
// Convert the xval and serial to a byte array to use
byte[] x = new byte[0x8];
byte[] s = new byte[0xD];
char[] sC = Serial.ToCharArray();
for (int i = 0, j = 0; j < 0xC; i += 2, j++)
{
if (i < 0x10)
{
x[j] = byte.Parse(xval.Substring(i, 2), System.Globalization.NumberStyles.HexNumber);
}
s[j] = (byte)sC[j];
}
return Decrypt(x, s);
}
public static uint[] Decrypt(byte[] xval, byte[] Serial)
{
// If the serial isn't 0xD and xval isn't 0x8, throw an exception
if (xval.Length != 8)
{
throw new ArgumentException("Xval length invalid!", "xval");
}
if (Serial.Length != 0xD)
{
throw new ArgumentException("Serial length invalid!", "Serial");
}
// Create the new instance of the hmac class
HMAC hmac = HMACSHA1.Create();
// Set the key
hmac.Key = Serial;
// Compute that ****
byte[] deskeytemp = hmac.ComputeHash(Encoding.ASCII.GetBytes("XBOX360SSB"));
byte[] deskey = new byte[0x8];
Array.Copy(deskeytemp, deskey, 8);
deskeytemp = null;
// If the des key does not equal 8, throw an exception
if (deskey.Length != 8)
{
throw new Exception("Invalid DES key");
}
// Create a new instance of the DES crytpo class
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
// Set the key
des.Key = deskey;
// Create the output buffer
byte[] Decrypted = new byte[8];
// Decrypt the data
des.CreateDecryptor().TransformBlock(xval, 0, xval.Length, Decrypted, 0);
// Convert the array to a long
Array.Reverse(Decrypted);
uint lower32 = BitConverter.ToUInt32(new byte[] { Decrypted[0], Decrypted[1], Decrypted[2], Decrypted[3] }, 0);
uint upper32 = BitConverter.ToUInt32(new byte[] { Decrypted[4], Decrypted[5], Decrypted[6], Decrypted[7] }, 0);
return new uint[] { upper32, lower32 };
}
public static string[] ReadDecryptedXval(uint[] Data)
{
uint highXval = Data[0];
uint lowXval = Data[1];
List<string> Flags = new List<string>();
if (highXval == 0 && lowXval == 0) // nothing is flagged in secdata.bin, all is good from this standpoint
return new string[] { "Secdata is Clean" };
else if (highXval == 0xFFFFFFFF && lowXval == 0xFFFFFFFF) // secdata was prob tampered with
return new string[] { "Secdata is invalid" };
else if (highXval != 0 && lowXval != 0) // most likely the serial or xval is incorrect
return new string[] { "Secdata decryption error" };
else
{ // the high dword = 0 and low dword not 0
// afaik best check. have to look at disassembly more
if ((lowXval & (int)XFlags.FLAG_SSB_AUTH_EX_FAILURE) != 0)
Flags.Add("AuthEx Challenge Failure"); // AP25 related
if ((lowXval & (int)XFlags.FLAG_SSB_AUTH_EX_NO_TABLE) != 0)
Flags.Add("AuthEx Table missing"); // AP25 related
if ((lowXval & (int)XFlags.FLAG_SSB_AUTH_EX_RESERVED) != 0)
Flags.Add("AuthEx Reserved Flag"); // AP25 related
if ((lowXval & (int)XFlags.FLAG_SSB_INVALID_DVD_GEOMETRY) != 0)
Flags.Add("Invalid DVD Geometry");
if ((lowXval & (int)XFlags.FLAG_SSB_INVALID_DVD_DMI) != 0)
Flags.Add("Invalid DVD DMI");
if ((lowXval & (int)XFlags.FLAG_SSB_DVD_KEYVAULT_PAIR_MISMATCH) != 0)
Flags.Add("DVD Keyvault Pair Mismatch");
if ((lowXval & (int)XFlags.FLAG_SSB_CRL_DATA_INVALID) != 0)
Flags.Add("Invalid CRL Data");
if ((lowXval & (int)XFlags.FLAG_SSB_CRL_CERTIFICATE_REVOKED) != 0)
Flags.Add("CRL Certificate Revoked");
if ((lowXval & (int)XFlags.FLAG_SSB_UNAUTHORIZED_INSTALL) != 0)
Flags.Add("Unauthorized Install");
if ((lowXval & (int)XFlags.FLAG_SSB_KEYVAULT_POLICY_VIOLATION) != 0)
Flags.Add("Keyvault Policy Violation");
if ((lowXval & (int)XFlags.FLAG_SSB_CONSOLE_BANNED) != 0)
Flags.Add("Console Banned");
if ((lowXval & (int)XFlags.FLAG_SSB_ODD_VIOLATION) != 0)
Flags.Add("ODD Violation");
if ((lowXval & 0xFFFFF000) != 0) // mask for bits we dont have a description for,
// note: we are not looking at the hi dword yet
Flags.Add("Unknown Violation(s)");
}
return Flags.ToArray();
}
private enum XFlags
{
FLAG_SSB_NONE = 0x0000,
FLAG_SSB_AUTH_EX_FAILURE = 0x0001,
FLAG_SSB_AUTH_EX_NO_TABLE = 0x0002,
FLAG_SSB_AUTH_EX_RESERVED = 0x0004,
FLAG_SSB_INVALID_DVD_GEOMETRY = 0x0008,
FLAG_SSB_INVALID_DVD_DMI = 0x0010,
FLAG_SSB_DVD_KEYVAULT_PAIR_MISMATCH = 0x0020,
FLAG_SSB_CRL_DATA_INVALID = 0x0040,
FLAG_SSB_CRL_CERTIFICATE_REVOKED = 0x0080,
FLAG_SSB_UNAUTHORIZED_INSTALL = 0x0100,
FLAG_SSB_KEYVAULT_POLICY_VIOLATION = 0x0200,
FLAG_SSB_CONSOLE_BANNED = 0x0400,
FLAG_SSB_ODD_VIOLATION = 0x0800,
}
}
}
#2. Posted:
Status: Offline
Joined: Jan 14, 201014Year Member
Posts: 37
Reputation Power: 1
Status: Offline
Joined: Jan 14, 201014Year Member
Posts: 37
Reputation Power: 1
Nice work CLK!
I am never on my Xbox360 enough to really use this, but thanks for the insite into how it works.
Also how do you get on XboxHacker?
For a long time now I always get the error "Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 16406482 bytes) in /home/xbh360/public_html/index.php on line 26".
I am never on my Xbox360 enough to really use this, but thanks for the insite into how it works.
Also how do you get on XboxHacker?
For a long time now I always get the error "Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 16406482 bytes) in /home/xbh360/public_html/index.php on line 26".
- 0useful
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#3. Posted:
Status: Offline
Joined: Jun 12, 201013Year Member
Posts: 531
Reputation Power: 33
I have no idea what XboxHacker's doing that, but I'll be sure to pass the word along SiliconIce/Redline and see if they can do anything about it.
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