mirror of
https://github.com/WiiDatabase/nusdownloader.git
synced 2024-11-27 04:34:14 +01:00
314 lines
11 KiB
C#
314 lines
11 KiB
C#
/* 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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//Patches based on Dop-Mii - Thanks to Arikado and Lunatik
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using System;
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using System.ComponentModel;
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using System.Text;
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namespace libWiiSharp
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{
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/// <summary>
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/// An IOS patcher which can patch fakesigning, es_identify and nand permissions.
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/// </summary>
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public class IosPatcher
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{
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private WAD wadFile;
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private int esIndex = -1;
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#region Public Functions
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/// <summary>
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/// Loads an IOS wad to patch the es module.
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/// </summary>
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/// <param name="iosWad"></param>
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public void LoadIOS(ref WAD iosWad)
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{
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if ((iosWad.TitleID >> 32) != 1 ||
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(iosWad.TitleID & 0xFFFFFFFF) < 3 ||
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(iosWad.TitleID & 0xFFFFFFFF) > 255)
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throw new Exception("Only IOS WADs can be patched!");
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wadFile = iosWad;
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getEsIndex();
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}
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/// <summary>
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/// Patches fakesigning.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchFakeSigning()
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{
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if (esIndex < 0) return -1;
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return patchFakeSigning(ref wadFile.Contents[esIndex]);
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}
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/// <summary>
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/// Patches es_identify.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchEsIdentify()
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{
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if (esIndex < 0) return -1;
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return patchEsIdentify(ref wadFile.Contents[esIndex]);
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}
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/// <summary>
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/// Patches nand permissions.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchNandPermissions()
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{
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if (esIndex < 0) return -1;
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return patchNandPermissions(ref wadFile.Contents[esIndex]);
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}
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/// <summary>
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/// Patches fakesigning, es_identify and nand permissions.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchAll()
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{
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if (esIndex < 0) return -1;
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return patchAll(ref wadFile.Contents[esIndex]);
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}
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/// <summary>
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/// Patches fakesigning.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchFakeSigning(ref byte[] esModule)
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{
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return patchFakeSigning(ref esModule);
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}
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/// <summary>
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/// Patches es_identify.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchEsIdentify(ref byte[] esModule)
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{
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return patchEsIdentify(ref esModule);
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}
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/// <summary>
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/// Patches nand permissions.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchNandPermissions(ref byte[] esModule)
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{
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return patchNandPermissions(ref esModule);
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}
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/// <summary>
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/// Patches fakesigning, es_identify and nand permissions.
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/// Returns the number of applied patches.
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/// </summary>
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/// <returns></returns>
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public int PatchAll(ref byte[] esModule)
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{
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return patchAll(ref esModule);
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}
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#endregion
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#region Private Functions
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private int patchFakeSigning(ref byte[] esModule)
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{
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fireDebug("Patching Fakesigning...");
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int patchCount = 0;
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byte[] oldHashCheck = { 0x20, 0x07, 0x23, 0xA2 };
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byte[] newHashCheck = { 0x20, 0x07, 0x4B, 0x0B };
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for (int i = 0; i < esModule.Length - 4; i++)
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{
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fireProgress((i + 1) * 100 / esModule.Length);
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if (Shared.CompareByteArrays(esModule, i, oldHashCheck, 0, 4) ||
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Shared.CompareByteArrays(esModule, i, newHashCheck, 0, 4))
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{
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fireDebug(" Patching at Offset: 0x{0}", i.ToString("x8").ToUpper());
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esModule[i + 1] = 0x00;
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i += 4;
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patchCount++;
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}
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}
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fireDebug("Patching Fakesigning Finished... (Patches applied: {0})", patchCount);
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return patchCount;
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}
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private int patchEsIdentify(ref byte[] esModule)
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{
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fireDebug("Patching ES_Identify...");
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int patchCount = 0;
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byte[] identifyCheck = { 0x28, 0x03, 0xD1, 0x23 };
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for (int i = 0; i < esModule.Length - 4; i++)
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{
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fireProgress((i + 1) * 100 / esModule.Length);
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if (Shared.CompareByteArrays(esModule, i, identifyCheck, 0, 4))
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{
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fireDebug(" Patching at Offset: 0x{0}", i.ToString("x8").ToUpper());
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esModule[i + 2] = 0x00;
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esModule[i + 3] = 0x00;
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i += 4;
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patchCount++;
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}
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}
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fireDebug("Patching ES_Identify Finished... (Patches applied: {0})", patchCount);
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return patchCount;
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}
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private int patchNandPermissions(ref byte[] esModule)
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{
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fireDebug("Patching NAND Permissions...");
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int patchCount = 0;
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byte[] permissionTable = { 0x42, 0x8B, 0xD0, 0x01, 0x25, 0x66 };
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for (int i = 0; i < esModule.Length - 6; i++)
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{
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fireProgress((i + 1) * 100 / esModule.Length);
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if (Shared.CompareByteArrays(esModule, i, permissionTable, 0, 6))
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{
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fireDebug(" Patching at Offset: 0x{0}", i.ToString("x8").ToUpper());
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esModule[i + 2] = 0xE0;
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i += 6;
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patchCount++;
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}
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}
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fireDebug("Patching NAND Permissions Finished... (Patches applied: {0})", patchCount);
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return patchCount;
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}
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private int patchAll(ref byte[] esModule)
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{
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fireDebug("Patching Fakesigning, ES_Identify and NAND Permissions...");
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int patchCount = 0;
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byte[] oldHashCheck = { 0x20, 0x07, 0x23, 0xA2 };
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byte[] newHashCheck = { 0x20, 0x07, 0x4B, 0x0B };
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byte[] identifyCheck = { 0x28, 0x03, 0xD1, 0x23 };
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byte[] permissionTable = { 0x42, 0x8B, 0xD0, 0x01, 0x25, 0x66 };
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for (int i = 0; i < esModule.Length - 6; i++)
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{
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fireProgress((i + 1) * 100 / esModule.Length);
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if (Shared.CompareByteArrays(esModule, i, oldHashCheck, 0, 4) ||
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Shared.CompareByteArrays(esModule, i, newHashCheck, 0, 4))
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{
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fireDebug(" Patching Fakesigning at Offset: 0x{0}", i.ToString("x8").ToUpper());
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esModule[i + 1] = 0x00;
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i += 4;
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patchCount++;
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}
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else if (Shared.CompareByteArrays(esModule, i, identifyCheck, 0, 4))
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{
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fireDebug(" Patching ES_Identify at Offset: 0x{0}", i.ToString("x8").ToUpper());
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esModule[i + 2] = 0x00;
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esModule[i + 3] = 0x00;
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i += 4;
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patchCount++;
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}
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else if (Shared.CompareByteArrays(esModule, i, permissionTable, 0, 6))
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{
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fireDebug(" Patching NAND Permissions at Offset: 0x{0}", i.ToString("x8").ToUpper());
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esModule[i + 2] = 0xE0;
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i += 6;
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patchCount++;
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}
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}
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fireDebug("Patching Fakesigning, ES_Identify and NAND Permissions Finished... (Patches applied: {0})", patchCount);
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return patchCount;
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}
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private void getEsIndex()
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{
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fireDebug("Scanning for ES Module...");
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string iosTag = "$IOSVersion:";
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for (int i = wadFile.NumOfContents - 1; i >= 0; i--)
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{
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fireDebug(" Scanning Content #{0} of {1}...", i + 1, wadFile.NumOfContents);
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fireProgress((i + 1) * 100 / wadFile.NumOfContents);
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for (int j = 0; j < wadFile.Contents[i].Length - 64; j++)
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{
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if (ASCIIEncoding.ASCII.GetString(wadFile.Contents[i], j, 12) == iosTag)
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{
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int curIndex = j + 12;
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while (wadFile.Contents[i][curIndex] == ' ') { curIndex++; }
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if (ASCIIEncoding.ASCII.GetString(wadFile.Contents[i], curIndex, 3) == "ES:")
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{
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fireDebug(" -> ES Module found!");
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fireDebug("Scanning for ES Module Finished...");
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esIndex = i;
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fireProgress(100);
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return;
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}
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}
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}
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}
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fireDebug(@"/!\/!\/!\ ES Module wasn't found! /!\/!\/!\");
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throw new Exception("ES module wasn't found!");
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}
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#endregion
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#region Events
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/// <summary>
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/// Fires the Progress of various operations
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/// </summary>
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public event EventHandler<ProgressChangedEventArgs> Progress;
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/// <summary>
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/// Fires debugging messages. You may write them into a log file or log textbox.
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/// </summary>
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public event EventHandler<MessageEventArgs> Debug;
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private void fireDebug(string debugMessage, params object[] args)
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{
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EventHandler<MessageEventArgs> debug = Debug;
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if (debug != null)
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debug(new object(), new MessageEventArgs(string.Format(debugMessage, args)));
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}
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private void fireProgress(int progressPercentage)
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{
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EventHandler<ProgressChangedEventArgs> progress = Progress;
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if (progress != null)
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progress(new object(), new ProgressChangedEventArgs(progressPercentage, string.Empty));
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}
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#endregion
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}
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}
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