diff --git a/BurnOutSharp/External/psxt001z/CRC16.cs b/BurnOutSharp/External/psxt001z/CRC16.cs new file mode 100644 index 00000000..ef3c45c1 --- /dev/null +++ b/BurnOutSharp/External/psxt001z/CRC16.cs @@ -0,0 +1,53 @@ +namespace BurnOutSharp.External.psxt001z +{ + public class CRC16 + { + // Table of CRC constants - implements x^16+x^12+x^5+1 + private static ushort[] crc16_tab = new ushort[] + { + 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, + 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, + 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, + 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, + 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, + 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, + 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, + 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc, + 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, + 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, + 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, + 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, + 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, + 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, + 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, + 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, + 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, + 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067, + 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, + 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, + 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, + 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, + 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, + 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, + 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, + 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, + 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, + 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, + 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, + 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, + 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, + 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0, + }; + + public static ushort Calculate(byte[] buf, int bufPtr, int len) + { + ushort cksum = 0; + for (int i = 0; i < len; i++) + { + cksum = (ushort)(crc16_tab[((cksum >> 8) ^ buf[bufPtr++]) & 0xFF] ^ (cksum << 8)); + } + + return (ushort)(~cksum); + } + } +} diff --git a/BurnOutSharp/External/psxt001z/LibCrypt.cs b/BurnOutSharp/External/psxt001z/LibCrypt.cs new file mode 100644 index 00000000..b500878a --- /dev/null +++ b/BurnOutSharp/External/psxt001z/LibCrypt.cs @@ -0,0 +1,139 @@ +using System; +using System.IO; + +namespace BurnOutSharp.External.psxt001z +{ + /// + /// LibCrypt detection code + /// Originally written by Dremora: https://github.com/Dremora/psxt001z + /// Ported and changed by darksabre76 + /// + public class LibCrypt + { + public static bool CheckSubfile(string subFilePath) + { + // opening .sub + FileStream subfile; + try + { + subfile = File.OpenRead(subFilePath); + } + catch + { + Console.WriteLine($"Error opening {subFilePath}"); + return false; + } + + // checking extension + string ext = Path.GetExtension(subFilePath).TrimStart('.').ToLowerInvariant(); + if (ext != "sub") + { + Console.WriteLine($"{ext}: unknown file extension"); + return false; + } + + // filesize + long size = subfile.Length; + if (size % 96 != 0) + { + Console.WriteLine($"{subFilePath}: wrong size"); + return false; + } + + return CheckSubfile(subfile); + } + + public static bool CheckSubfile(Stream subfile) + { + // Variables + byte[] buffer = new byte[16]; + byte[] sub = new byte[16]; + int tpos = 0; + uint sector, psectors = 0; + long size = subfile.Length; + + for (sector = 150; sector < ((size / 96) + 150); sector++) + { + subfile.Seek(12, SeekOrigin.Current); + if (subfile.Read(buffer, 0, 12) == 0) + return true; + + subfile.Seek(72, SeekOrigin.Current); + + // New track + if ((btoi(buffer[1]) == (btoi(sub[1]) + 1)) && (buffer[2] == 0 || buffer[2] == 1)) + { + Array.Copy(buffer, sub, 6); + tpos = ((btoi((byte)(buffer[3] * 60)) + btoi(buffer[4])) * 75) + btoi(buffer[5]); + } + + // New index + else if (btoi(buffer[2]) == (btoi(sub[2]) + 1) && buffer[1] == sub[1]) + { + Array.Copy(buffer, 2, sub, 2, 4); + tpos = ((btoi((byte)(buffer[3] * 60)) + btoi(buffer[4])) * 75) + btoi(buffer[5]); + } + + // MSF1 [3-5] + else + { + if (sub[2] == 0) + tpos--; + else + tpos++; + + sub[3] = itob((byte)(tpos / 60 / 75)); + sub[4] = itob((byte)((tpos / 75) % 60)); + sub[5] = itob((byte)(tpos % 75)); + } + + // MSF2 [7-9] + sub[7] = itob((byte)(sector / 60 / 75)); + sub[8] = itob((byte)((sector / 75) % 60)); + sub[9] = itob((byte)(sector % 75)); + + // CRC-16 [10-11] + ushort crc = CRC16.Calculate(sub, 0, 10); + byte[] crcBytes = BitConverter.GetBytes(crc); + sub[10] = crcBytes[0]; + sub[11] = crcBytes[1]; + + // TODO: This *was* a memcmp, but that's harder to do. Fix this for C# later + if (buffer[10] != sub[10] && buffer[11] != sub[11] && (buffer[3] != sub[3] || buffer[7] != sub[7] || buffer[4] != sub[4] || buffer[8] != sub[8] || buffer[5] != sub[5] || buffer[9] != sub[9])) + { + if (buffer[10] != sub[10] || buffer[11] != sub[11] || buffer[3] != sub[3] || buffer[7] != sub[7] || buffer[4] != sub[4] || buffer[8] != sub[8] || buffer[5] != sub[5] || buffer[9] != sub[9]) + { + Console.Write($"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}"); + //Console.Write("\nMSF: %02x:%02x:%02x Q-Data: %02x%02x%02x %02x:%02x:%02x %02x %02x:%02x:%02x %02x%02x", sub[7], sub[8], sub[9], sub[0], sub[1], sub[2], sub[3], sub[4], sub[5], sub[6], sub[7], sub[8], sub[9], sub[10], sub[11]); + 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]) + Console.Write($" P1 xor {buffer[3] ^ sub[3]:x} {buffer[7] ^ sub[7]:x}"); + else if (buffer[3] == sub[3] && buffer[7] == sub[7] && buffer[4] != sub[4] && buffer[8] != sub[8] && buffer[5] == sub[5] && buffer[9] == sub[9]) + Console.Write($" P2 xor {buffer[4] ^ sub[4]:x} {buffer[8] ^ sub[8]:x}"); + 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]) + Console.Write($" P3 xor {buffer[5] ^ sub[5]:x} {buffer[9] ^ sub[9]:x}"); + else + Console.Write(" ?"); + + Console.Write("\n"); + psectors++; + } + } + } + + Console.WriteLine($"Number of modified sectors: {psectors}"); + return true; + } + + private static byte btoi(byte b) + { + /* BCD to u_char */ + return (byte)((b) / 16 * 10 + (b) % 16); + } + + private static byte itob(byte i) + { + /* u_char to BCD */ + return (byte)((i) / 10 * 16 + (i) % 10); + } + } +}