mirror of
https://github.com/SabreTools/BinaryObjectScanner.git
synced 2026-07-08 18:06:34 +00:00
Remove console writes, make LibCrypt read better
This commit is contained in:
Matt Nadareski
222
BurnOutSharp/External/psxt001z/LibCrypt.cs
vendored
222
BurnOutSharp/External/psxt001z/LibCrypt.cs
vendored
@@ -1,146 +1,128 @@
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using System;
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using System.IO;
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using System.Linq;
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namespace BurnOutSharp.External.psxt001z
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{
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/// <summary>
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/// LibCrypt detection code
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/// Originally written by Dremora: https://github.com/Dremora/psxt001z
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/// Ported and changed by darksabre76
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/// </summary>
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public class LibCrypt
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/// <summary>
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/// LibCrypt detection code
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/// Originally written by Dremora: https://github.com/Dremora/psxt001z
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/// Ported and changed by darksabre76
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/// </summary>
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public class LibCrypt
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{
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public static bool CheckSubfile(string subFilePath)
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{
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// Check the file exists first
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if (!File.Exists(subFilePath))
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{
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Console.WriteLine($"{subFilePath} could not be found");
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return false;
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}
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// Check the file exists first
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if (!File.Exists(subFilePath))
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return false;
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// Check the extension is a subfile
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string ext = Path.GetExtension(subFilePath).TrimStart('.').ToLowerInvariant();
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if (ext != "sub")
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{
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Console.WriteLine($"{ext}: unknown file extension");
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return false;
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}
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// Check the extension is a subfile
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string ext = Path.GetExtension(subFilePath).TrimStart('.').ToLowerInvariant();
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if (ext != "sub")
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return false;
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// Open and check the subfile for LibCrypt
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try
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{
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using (FileStream subfile = File.OpenRead(subFilePath))
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{
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return CheckSubfile(subfile);
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}
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}
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catch
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{
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Console.WriteLine($"Error processing {subFilePath}");
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return false;
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}
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}
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// Open and check the subfile for LibCrypt
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try
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{
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using (FileStream subfile = File.OpenRead(subFilePath))
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{
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return CheckSubfile(subfile);
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}
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}
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catch
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{
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return false;
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}
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}
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public static bool CheckSubfile(Stream subfile)
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{
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// Check the length is valid for subfiles
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long size = subfile.Length;
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if (size % 96 != 0)
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{
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Console.WriteLine($"Wrong size");
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return false;
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}
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public static bool CheckSubfile(Stream subfile)
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{
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// Check the length is valid for subfiles
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long size = subfile.Length;
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if (size % 96 != 0)
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return false;
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// Persistent values
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byte[] buffer = new byte[16];
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byte[] sub = new byte[16];
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int tpos = 0;
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int modifiedSectors = 0;
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// Persistent values
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byte[] buffer = new byte[16];
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byte[] sub = new byte[16];
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int tpos = 0;
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int modifiedSectors = 0;
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// Check each sector for modifications
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for (uint sector = 150; sector < ((size / 96) + 150); sector++)
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{
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subfile.Seek(12, SeekOrigin.Current);
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if (subfile.Read(buffer, 0, 12) == 0)
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return modifiedSectors != 0;
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// Check each sector for modifications
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for (uint sector = 150; sector < ((size / 96) + 150); sector++)
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{
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subfile.Seek(12, SeekOrigin.Current);
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if (subfile.Read(buffer, 0, 12) == 0)
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return modifiedSectors != 0;
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subfile.Seek(72, SeekOrigin.Current);
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subfile.Seek(72, SeekOrigin.Current);
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// New track
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if ((btoi(buffer[1]) == (btoi(sub[1]) + 1)) && (buffer[2] == 0 || buffer[2] == 1))
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{
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Array.Copy(buffer, sub, 6);
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tpos = ((btoi((byte)(buffer[3] * 60)) + btoi(buffer[4])) * 75) + btoi(buffer[5]);
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}
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// New track
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if ((btoi(buffer[1]) == (btoi(sub[1]) + 1)) && (buffer[2] == 0 || buffer[2] == 1))
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{
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Array.Copy(buffer, sub, 6);
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tpos = ((btoi((byte)(buffer[3] * 60)) + btoi(buffer[4])) * 75) + btoi(buffer[5]);
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}
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// New index
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else if (btoi(buffer[2]) == (btoi(sub[2]) + 1) && buffer[1] == sub[1])
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{
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Array.Copy(buffer, 2, sub, 2, 4);
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tpos = ((btoi((byte)(buffer[3] * 60)) + btoi(buffer[4])) * 75) + btoi(buffer[5]);
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}
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// New index
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else if (btoi(buffer[2]) == (btoi(sub[2]) + 1) && buffer[1] == sub[1])
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{
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Array.Copy(buffer, 2, sub, 2, 4);
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tpos = ((btoi((byte)(buffer[3] * 60)) + btoi(buffer[4])) * 75) + btoi(buffer[5]);
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}
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// MSF1 [3-5]
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else
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{
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if (sub[2] == 0)
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tpos--;
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else
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tpos++;
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// MSF1 [3-5]
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else
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{
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if (sub[2] == 0)
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tpos--;
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else
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tpos++;
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sub[3] = itob((byte)(tpos / 60 / 75));
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sub[4] = itob((byte)((tpos / 75) % 60));
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sub[5] = itob((byte)(tpos % 75));
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}
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sub[3] = itob((byte)(tpos / 60 / 75));
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sub[4] = itob((byte)((tpos / 75) % 60));
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sub[5] = itob((byte)(tpos % 75));
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}
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// MSF2 [7-9]
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sub[7] = itob((byte)(sector / 60 / 75));
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sub[8] = itob((byte)((sector / 75) % 60));
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sub[9] = itob((byte)(sector % 75));
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// MSF2 [7-9]
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sub[7] = itob((byte)(sector / 60 / 75));
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sub[8] = itob((byte)((sector / 75) % 60));
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sub[9] = itob((byte)(sector % 75));
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// CRC-16 [10-11]
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ushort crc = CRC16.Calculate(sub, 0, 10);
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byte[] crcBytes = BitConverter.GetBytes(crc);
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sub[10] = crcBytes[0];
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sub[11] = crcBytes[1];
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// CRC-16 [10-11]
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ushort crc = CRC16.Calculate(sub, 0, 10);
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byte[] crcBytes = BitConverter.GetBytes(crc);
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sub[10] = crcBytes[0];
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sub[11] = crcBytes[1];
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// TODO: This *was* a memcmp, but that's harder to do. Fix this for C# later
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if (buffer[10] != sub[10] && buffer[11] != sub[11] && (buffer[3] != sub[3] || buffer[4] != sub[4] || buffer[5] != sub[5] || buffer[7] != sub[7] || buffer[8] != sub[8] || buffer[9] != sub[9]))
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{
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if (buffer[3] != sub[3] || buffer[4] != sub[4] || buffer[5] != sub[5] || buffer[7] != sub[7] || buffer[8] != sub[8] || buffer[9] != sub[9] || buffer[10] != sub[10] || buffer[11] != sub[11])
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{
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Console.Write($"MSF: {sub[7]:x}:{sub[8]:x}:{sub[9]:x} Q-Data: {buffer[0]:x}{buffer[1]:x}{buffer[2]:x} {buffer[3]:x}:{buffer[4]:x}:{buffer[5]:x} {buffer[6]:x} {buffer[7]:x}:{buffer[8]:x}:{buffer[9]:x} {buffer[10]:x}{buffer[11]:x} xor {crc ^ ((buffer[10] << 8) + buffer[11]):x} % {CRC16.Calculate(buffer, 0, 10) ^ ((buffer[10] << 8) + buffer[11]):x}");
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//Console.Write($"\nMSF: {sub[7]:x}:{sub[8]:x}:{sub[9]:x} Q-Data: {sub[0]:x}{sub[1]:x}{sub[2]:x} {sub[3]:x}:{sub[4]:x}:{sub[5]:x} {sub[6]:x} {sub[7]:x}:{sub[8]:x}:{sub[9]:x} {sub[10]:x}{sub[11]:x}");
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if (buffer[3] != sub[3] && buffer[7] != sub[7] && buffer[4] == sub[4] && buffer[8] == sub[8] && buffer[5] == sub[5] && buffer[9] == sub[9])
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Console.Write($" P1 xor {buffer[3] ^ sub[3]:x} {buffer[7] ^ sub[7]:x}");
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else if (buffer[3] == sub[3] && buffer[7] == sub[7] && buffer[4] != sub[4] && buffer[8] != sub[8] && buffer[5] == sub[5] && buffer[9] == sub[9])
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Console.Write($" P2 xor {buffer[4] ^ sub[4]:x} {buffer[8] ^ sub[8]:x}");
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else if (buffer[3] == sub[3] && buffer[7] == sub[7] && buffer[4] == sub[4] && buffer[8] == sub[8] && buffer[5] != sub[5] && buffer[9] != sub[9])
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Console.Write($" P3 xor {buffer[5] ^ sub[5]:x} {buffer[9] ^ sub[9]:x}");
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else
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Console.Write(" ?");
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// If any byte (except position 6) is different, it's a modified sector
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for (int i = 0; i < 12; i++)
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{
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if (i == 6)
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continue;
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Console.Write("\n");
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modifiedSectors++;
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}
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}
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}
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if (buffer[i] != sub[i])
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{
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modifiedSectors++;
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break;
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}
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}
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}
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Console.WriteLine($"Number of modified sectors: {modifiedSectors}");
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return modifiedSectors != 0;
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}
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return modifiedSectors != 0;
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}
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private static byte btoi(byte b)
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{
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/* BCD to u_char */
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return (byte)((b) / 16 * 10 + (b) % 16);
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}
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private static byte btoi(byte b)
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{
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/* BCD to u_char */
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return (byte)((b) / 16 * 10 + (b) % 16);
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}
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private static byte itob(byte i)
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{
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/* u_char to BCD */
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return (byte)((i) / 10 * 16 + (i) % 10);
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}
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}
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private static byte itob(byte i)
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{
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/* u_char to BCD */
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return (byte)((i) / 10 * 16 + (i) % 10);
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}
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}
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}
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@@ -33,7 +33,6 @@ namespace BurnOutSharp.FileType
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using (StreamReader sr = new StreamReader(listStream))
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{
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listfile = sr.ReadToEnd();
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Console.WriteLine(listfile);
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}
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string sub = string.Empty;
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