mirror of
https://github.com/WiiDatabase/nusdownloader.git
synced 2024-11-27 20:44:23 +01:00
495 lines
17 KiB
C#
495 lines
17 KiB
C#
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/* This file is part of libWiiSharp
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* Copyright (C) 2009 Leathl
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*
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* libWiiSharp is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* libWiiSharp is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.IO;
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using System.Security.Cryptography;
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namespace libWiiSharp
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{
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public class CertificateChain : IDisposable
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{
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private const string certCaHash = "5B7D3EE28706AD8DA2CBD5A6B75C15D0F9B6F318";
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private const string certCpHash = "6824D6DA4C25184F0D6DAF6EDB9C0FC57522A41C";
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private const string certXsHash = "09787045037121477824BC6A3E5E076156573F8A";
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private SHA1 sha = SHA1.Create();
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private bool[] certsComplete = new bool[3];
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private byte[] certCa = new byte[0x400];
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private byte[] certCp = new byte[0x300];
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private byte[] certXs = new byte[0x300];
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/// <summary>
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/// If false, the Certificate Chain is not complete (i.e. at least one certificate is missing).
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/// </summary>
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public bool CertsComplete { get { return (certsComplete[0] && certsComplete[1] && certsComplete[2]); } }
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#region IDisposable Members
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private bool isDisposed = false;
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~CertificateChain()
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{
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Dispose(false);
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}
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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protected virtual void Dispose(bool disposing)
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{
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if (disposing && !isDisposed)
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{
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sha.Clear();
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sha = null;
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certsComplete = null;
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certCa = null;
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certCp = null;
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certXs = null;
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}
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isDisposed = true;
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}
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#endregion
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#region Public Functions
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/// <summary>
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/// Loads a cert file.
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/// </summary>
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/// <param name="pathToCert"></param>
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/// <returns></returns>
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public static CertificateChain Load(string pathToCert)
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{
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return Load(File.ReadAllBytes(pathToCert));
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}
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/// <summary>
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/// Loads a cert file.
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/// </summary>
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/// <param name="certFile"></param>
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/// <returns></returns>
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public static CertificateChain Load(byte[] certFile)
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{
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CertificateChain c = new CertificateChain();
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MemoryStream ms = new MemoryStream(certFile);
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try { c.parseCert(ms); }
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catch { ms.Dispose(); throw; }
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ms.Dispose();
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return c;
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}
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/// <summary>
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/// Loads a cert file.
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/// </summary>
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/// <param name="cert"></param>
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/// <returns></returns>
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public static CertificateChain Load(Stream cert)
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{
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CertificateChain c = new CertificateChain();
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c.parseCert(cert);
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return c;
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}
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/// <summary>
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/// Grabs certificates from Ticket and Tmd.
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/// Ticket and Tmd must contain certs! (They do when they're downloaded from NUS!)
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/// </summary>
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/// <param name="pathToTik"></param>
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/// <param name="pathToTmd"></param>
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/// <returns></returns>
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public static CertificateChain FromTikTmd(string pathToTik, string pathToTmd)
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{
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return FromTikTmd(File.ReadAllBytes(pathToTik), File.ReadAllBytes(pathToTmd));
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}
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/// <summary>
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/// Grabs certificates from Ticket and Tmd.
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/// Ticket and Tmd must contain certs! (They do when they're downloaded from NUS!)
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/// </summary>
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/// <param name="tikFile"></param>
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/// <param name="tmdFile"></param>
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/// <returns></returns>
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public static CertificateChain FromTikTmd(byte[] tikFile, byte[] tmdFile)
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{
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CertificateChain c = new CertificateChain();
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MemoryStream ms = new MemoryStream(tikFile);
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try { c.grabFromTik(ms); }
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catch { ms.Dispose(); throw; }
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ms = new MemoryStream(tmdFile);
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try { c.grabFromTmd(ms); }
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catch { ms.Dispose(); throw; }
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ms.Dispose();
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if (!c.CertsComplete) throw new Exception("Couldn't locate all certs!");
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return c;
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}
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/// <summary>
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/// Grabs certificates from Ticket and Tmd.
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/// Ticket and Tmd must contain certs! (They do when they're downloaded from NUS!)
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/// </summary>
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/// <param name="tik"></param>
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/// <param name="tmd"></param>
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/// <returns></returns>
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public static CertificateChain FromTikTmd(Stream tik, Stream tmd)
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{
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CertificateChain c = new CertificateChain();
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c.grabFromTik(tik);
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c.grabFromTmd(tmd);
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return c;
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}
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/// <summary>
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/// Loads a cert file.
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/// </summary>
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/// <param name="pathToCert"></param>
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public void LoadFile(string pathToCert)
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{
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LoadFile(File.ReadAllBytes(pathToCert));
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}
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/// <summary>
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/// Loads a cert file.
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/// </summary>
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/// <param name="certFile"></param>
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public void LoadFile(byte[] certFile)
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{
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MemoryStream ms = new MemoryStream(certFile);
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try { parseCert(ms); }
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catch { ms.Dispose(); throw; }
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ms.Dispose();
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}
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/// <summary>
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/// Loads a cert file.
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/// </summary>
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/// <param name="cert"></param>
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public void LoadFile(Stream cert)
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{
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parseCert(cert);
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}
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/// <summary>
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/// Grabs certificates from Ticket and Tmd.
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/// Ticket and Tmd must contain certs! (They do when they're downloaded from NUS!)
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/// </summary>
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/// <param name="pathToTik"></param>
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/// <param name="pathToTmd"></param>
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/// <returns></returns>
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public void LoadFromTikTmd(string pathToTik, string pathToTmd)
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{
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LoadFromTikTmd(File.ReadAllBytes(pathToTik), File.ReadAllBytes(pathToTmd));
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}
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/// <summary>
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/// Grabs certificates from Ticket and Tmd.
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/// Ticket and Tmd must contain certs! (They do when they're downloaded from NUS!)
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/// </summary>
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/// <param name="tikFile"></param>
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/// <param name="tmdFile"></param>
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public void LoadFromTikTmd(byte[] tikFile, byte[] tmdFile)
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{
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MemoryStream ms = new MemoryStream(tikFile);
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try { grabFromTik(ms); }
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catch { ms.Dispose(); throw; }
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ms = new MemoryStream(tmdFile);
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try { grabFromTmd(ms); }
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catch { ms.Dispose(); throw; }
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ms.Dispose();
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if (!CertsComplete) throw new Exception("Couldn't locate all certs!");
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}
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/// <summary>
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/// Grabs certificates from Ticket and Tmd.
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/// Ticket and Tmd must contain certs! (They do when they're downloaded from NUS!)
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/// </summary>
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/// <param name="tik"></param>
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/// <param name="tmd"></param>
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public void LoadFromTikTmd(Stream tik, Stream tmd)
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{
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grabFromTik(tik);
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grabFromTmd(tmd);
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}
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/// <summary>
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/// Saves the Certificate Chain.
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/// </summary>
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/// <param name="savePath"></param>
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public void Save(string savePath)
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{
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if (File.Exists(savePath)) File.Delete(savePath);
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using (FileStream fs = new FileStream(savePath, FileMode.Create))
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writeToStream(fs);
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}
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/// <summary>
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/// Returns the Certificate Chain as a memory stream.
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/// </summary>
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/// <returns></returns>
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public MemoryStream ToMemoryStream()
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{
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MemoryStream ms = new MemoryStream();
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try { writeToStream(ms); }
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catch { ms.Dispose(); throw; }
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return ms;
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}
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/// <summary>
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/// Returns the Certificate Chain as a byte array.
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/// </summary>
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/// <returns></returns>
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public byte[] ToByteArray()
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{
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MemoryStream ms = new MemoryStream();
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try { writeToStream(ms); }
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catch { ms.Dispose(); throw; }
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byte[] res = ms.ToArray();
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ms.Dispose();
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return res;
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}
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#endregion
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#region Private Functions
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private void writeToStream(Stream writeStream)
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{
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fireDebug("Writing Certificate Chain...");
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if (!CertsComplete)
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{ fireDebug(" Certificate Chain incomplete..."); throw new Exception("At least one certificate is missing!"); }
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writeStream.Seek(0, SeekOrigin.Begin);
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fireDebug(" Writing Certificate CA... (Offset: 0x{0})", writeStream.Position.ToString("x8"));
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writeStream.Write(certCa, 0, certCa.Length);
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fireDebug(" Writing Certificate CP... (Offset: 0x{0})", writeStream.Position.ToString("x8"));
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writeStream.Write(certCp, 0, certCp.Length);
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fireDebug(" Writing Certificate XS... (Offset: 0x{0})", writeStream.Position.ToString("x8"));
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writeStream.Write(certXs, 0, certXs.Length);
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fireDebug("Writing Certificate Chain Finished...");
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}
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private void parseCert(Stream certFile)
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{
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fireDebug("Parsing Certificate Chain...");
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int off = 0;
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for (int i = 0; i < 3; i++)
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{
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fireDebug(" Scanning at Offset 0x{0}:", off.ToString("x8"));
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try
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{
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certFile.Seek(off, SeekOrigin.Begin);
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byte[] temp = new byte[0x400];
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certFile.Read(temp, 0, temp.Length);
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fireDebug(" Checking for Certificate CA...");
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if (isCertCa(temp) && !certsComplete[1])
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{ fireDebug(" Certificate CA detected..."); certCa = temp; certsComplete[1] = true; off += 0x400; continue; }
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fireDebug(" Checking for Certificate CP...");
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if (isCertCp(temp) && !certsComplete[2])
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{ fireDebug(" Certificate CP detected..."); Array.Resize(ref temp, 0x300); certCp = temp; certsComplete[2] = true; off += 0x300; continue; }
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fireDebug(" Checking for Certificate XS...");
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if (isCertXs(temp) && !certsComplete[0])
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{ fireDebug(" Certificate XS detected..."); Array.Resize(ref temp, 0x300); certXs = temp; certsComplete[0] = true; off += 0x300; continue; }
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}
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catch (Exception ex) { fireDebug("Error: {0}", ex.Message); }
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off += 0x300;
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}
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if (!CertsComplete)
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{ fireDebug(" Couldn't locate all Certificates..."); throw new Exception("Couldn't locate all certs!"); }
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fireDebug("Parsing Certificate Chain Finished...");
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}
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private void grabFromTik(Stream tik)
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{
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fireDebug("Scanning Ticket for Certificates...");
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int off = 676;
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for (int i = 0; i < 3; i++)
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{
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fireDebug(" Scanning at Offset 0x{0}:", off.ToString("x8"));
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try
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{
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tik.Seek(off, SeekOrigin.Begin);
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byte[] temp = new byte[0x400];
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tik.Read(temp, 0, temp.Length);
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fireDebug(" Checking for Certificate CA...");
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if (isCertCa(temp) && !certsComplete[1])
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{ fireDebug(" Certificate CA detected..."); certCa = temp; certsComplete[1] = true; off += 0x400; continue; }
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|||
|
|
fireDebug(" Checking for Certificate CP...");
|
|||
|
|
if (isCertCp(temp) && !certsComplete[2])
|
|||
|
|
{ fireDebug(" Certificate CP detected..."); Array.Resize(ref temp, 0x300); certCp = temp; certsComplete[2] = true; off += 0x300; continue; }
|
|||
|
|
|
|||
|
|
fireDebug(" Checking for Certificate XS...");
|
|||
|
|
if (isCertXs(temp) && !certsComplete[0])
|
|||
|
|
{ fireDebug(" Certificate XS detected..."); Array.Resize(ref temp, 0x300); certXs = temp; certsComplete[0] = true; off += 0x300; continue; }
|
|||
|
|
}
|
|||
|
|
catch { }
|
|||
|
|
|
|||
|
|
off += 0x300;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
fireDebug("Scanning Ticket for Certificates Finished...");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void grabFromTmd(Stream tmd)
|
|||
|
|
{
|
|||
|
|
fireDebug("Scanning TMD for Certificates...");
|
|||
|
|
|
|||
|
|
byte[] temp = new byte[2];
|
|||
|
|
tmd.Seek(478, SeekOrigin.Begin);
|
|||
|
|
tmd.Read(temp, 0, 2);
|
|||
|
|
|
|||
|
|
int numContents = Shared.Swap(BitConverter.ToUInt16(temp, 0));
|
|||
|
|
int off = 484 + numContents * 36;
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 3; i++)
|
|||
|
|
{
|
|||
|
|
fireDebug(" Scanning at Offset 0x{0}:", off.ToString("x8"));
|
|||
|
|
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
tmd.Seek(off, SeekOrigin.Begin);
|
|||
|
|
temp = new byte[0x400];
|
|||
|
|
|
|||
|
|
tmd.Read(temp, 0, temp.Length);
|
|||
|
|
|
|||
|
|
fireDebug(" Checking for Certificate CA...");
|
|||
|
|
if (isCertCa(temp) && !certsComplete[1])
|
|||
|
|
{ fireDebug(" Certificate CA detected..."); certCa = temp; certsComplete[1] = true; off += 0x400; continue; }
|
|||
|
|
|
|||
|
|
fireDebug(" Checking for Certificate CP...");
|
|||
|
|
if (isCertCp(temp) && !certsComplete[2])
|
|||
|
|
{ fireDebug(" Certificate CP detected..."); Array.Resize(ref temp, 0x300); certCp = temp; certsComplete[2] = true; off += 0x300; continue; }
|
|||
|
|
|
|||
|
|
fireDebug(" Checking for Certificate XS...");
|
|||
|
|
if (isCertXs(temp) && !certsComplete[0])
|
|||
|
|
{ fireDebug(" Certificate XS detected..."); Array.Resize(ref temp, 0x300); certXs = temp; certsComplete[0] = true; off += 0x300; continue; }
|
|||
|
|
}
|
|||
|
|
catch { }
|
|||
|
|
|
|||
|
|
off += 0x300;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
fireDebug("Scanning TMD for Certificates Finished...");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private bool isCertXs(byte[] part)
|
|||
|
|
{
|
|||
|
|
if (part.Length < 0x300) return false;
|
|||
|
|
else if (part.Length > 0x300) Array.Resize(ref part, 0x300);
|
|||
|
|
|
|||
|
|
if (part[0x184] == 'X' && part[0x185] == 'S')
|
|||
|
|
{
|
|||
|
|
byte[] newHash = sha.ComputeHash(part);
|
|||
|
|
byte[] oldHash = Shared.HexStringToByteArray(certXsHash);
|
|||
|
|
|
|||
|
|
if (Shared.CompareByteArrays(newHash, oldHash)) return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private bool isCertCa(byte[] part)
|
|||
|
|
{
|
|||
|
|
if (part.Length < 0x400) return false;
|
|||
|
|
else if (part.Length > 0x400) Array.Resize(ref part, 0x400);
|
|||
|
|
|
|||
|
|
if (part[0x284] == 'C' && part[0x285] == 'A')
|
|||
|
|
{
|
|||
|
|
byte[] newHash = sha.ComputeHash(part);
|
|||
|
|
byte[] oldHash = Shared.HexStringToByteArray(certCaHash);
|
|||
|
|
|
|||
|
|
if (Shared.CompareByteArrays(newHash, oldHash)) return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private bool isCertCp(byte[] part)
|
|||
|
|
{
|
|||
|
|
if (part.Length < 0x300) return false;
|
|||
|
|
else if (part.Length > 0x300) Array.Resize(ref part, 0x300);
|
|||
|
|
|
|||
|
|
if (part[0x184] == 'C' && part[0x185] == 'P')
|
|||
|
|
{
|
|||
|
|
byte[] newHash = sha.ComputeHash(part);
|
|||
|
|
byte[] oldHash = Shared.HexStringToByteArray(certCpHash);
|
|||
|
|
|
|||
|
|
if (Shared.CompareByteArrays(newHash, oldHash)) return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
#endregion
|
|||
|
|
|
|||
|
|
#region Events
|
|||
|
|
/// <summary>
|
|||
|
|
/// Fires debugging messages. You may write them into a log file or log textbox.
|
|||
|
|
/// </summary>
|
|||
|
|
public event EventHandler<MessageEventArgs> Debug;
|
|||
|
|
|
|||
|
|
private void fireDebug(string debugMessage, params object[] args)
|
|||
|
|
{
|
|||
|
|
EventHandler<MessageEventArgs> debug = Debug;
|
|||
|
|
if (debug != null)
|
|||
|
|
debug(new object(), new MessageEventArgs(string.Format(debugMessage, args)));
|
|||
|
|
}
|
|||
|
|
#endregion
|
|||
|
|
}
|
|||
|
|
}
|