280 lines
12 KiB
C#
280 lines
12 KiB
C#
using System;
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using System.IO;
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using System.IO.Hashing;
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namespace LibIRD
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{
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#region Enumerations
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/// <summary>
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/// Type used to define all known PS3 disc regions
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/// </summary>
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public enum Region
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{
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// Null region
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NONE = 0x00,
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// Japan and Asia
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Asia = 0x01, // BLAS/BCAS serials
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Japan = Asia, // BLJM/BCJS serials
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Korea = Asia, // BLKS/BCKS serials
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// USA and Canada (NA)
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NorthAmerica = 0x03,
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USA = NorthAmerica,
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Canada = NorthAmerica,
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// Europe, Middle East, and Africa (EMEA)
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Europe = 0x04,
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MiddleEast = Europe,
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Africa = Europe,
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// Australia and New Zealand (Oceania)
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Australia = 0x06, // Some releases use Region.Europe instead
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NewZealand = Australia, // Some releases use Region.Europe instead
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// Brazil and Latin America (LATAM)
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LatinAmerica = 0x09, // e.g. Portuguese + Spanish release
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Brazil = LatinAmerica,
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// Mexico is often Region.NorthAmerica
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// Russia and Eastern Europe
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EasternEurope = 0x0A, // e.g. Russian + Polish language release
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Russia = EasternEurope,
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// Poland is Region.Europe
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}
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#endregion
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/// <summary>
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/// Create a reproducible, redump-style IRD file from an ISO and a Disc Key
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/// </summary>
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public class ReIRD : IRD
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{
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#region Properties
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/// <summary>
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/// ISO file size
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/// </summary>
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public long Size { get; private set; }
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#endregion
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#region Constructors
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/// <summary>
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/// Constructor using .getkey.log for Disc Key
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/// </summary>
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/// <param name="isoPath">Path to the ISO</param>
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/// <param name="getKeyLog">Path to the GetKey log file</param>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="FileNotFoundException"></exception>
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/// <exception cref="InvalidDataException"></exception>
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public ReIRD(string isoPath, string getKeyLog) : base(isoPath, getKeyLog)
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{
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// Generate Unique Identifier using ISO CRC32
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UID = GenerateUID(isoPath);
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// Determine ISO file size
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Size = CalculateSize(isoPath);
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// Generate Data 2 using Disc ID
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DiscID = GenerateID(Size);
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// Check that GetKey log matches expected Disc ID
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//if (!((ReadOnlySpan<byte>)Data2Key).SequenceEqual(d2))
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// throw new InvalidDataException("Unexpected Disc ID in .getkey.log");
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// Generate Disc PIC
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byte[] pic = GeneratePIC(Size);
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// Check that GetKey log matches expected PIC
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if (!((ReadOnlySpan<byte>)PIC).SequenceEqual(pic))
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throw new InvalidDataException("Unexpected PIC in .getkey.log");
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}
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/// <summary>
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/// Constructor with optional additional region to generate a specific Disc ID
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/// </summary>
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/// <param name="isoPath">Path to the ISO</param>
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/// <param name="key">Disc Key, redump-style (AES encrypted Data 1)</param>
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/// <param name="region">Disc Region</param>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="FileNotFoundException"></exception>
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public ReIRD(string isoPath, byte[] key, Region region = Region.NONE)
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{
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// Generate Unique Identifier using ISO CRC32
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UID = GenerateUID(isoPath);
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// Determine ISO file size
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Size = CalculateSize(isoPath);
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// Set Disc Key
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DiscKey = key;
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// Generate Data 2 using Disc ID
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DiscID = GenerateID(Size, region);
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// Generate Disc PIC
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PIC = GeneratePIC(Size);
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// Generate IRD fields
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GenerateIRD(isoPath);
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}
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#endregion
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#region Methods
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/// <summary>
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/// Generates a Disc ID given a size and region, where region is a single byte
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/// </summary>
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/// <returns>Valid Disc ID, byte array length 16</returns>
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private static byte[] GenerateID(long size, Region region = Region.NONE)
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{
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if (size > BDLayerSize) // if BD-50, Disc ID is fixed
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return new byte[]{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
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0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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else // else if BD-25, Disc ID has a byte referring to disc region
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{
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return new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
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0x00, 0x02, 0x00, (byte)region, 0x00, 0x00, 0x00, 0x01 };
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}
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}
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/// <summary>
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/// Generates the PIC data for a given ISO size in bytes
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/// </summary>
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/// <param name="size">Total ISO size in number of bytes</param>
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/// <param name="layerbreak">Layer break value, byte at which disc layers are split across</param>
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/// <param name="exactIRD">True to generate a PIC in 3k3y style (0x03 at 115th byte for BD-50 discs)</param>
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/// <exception cref="ArgumentException"></exception>
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private static byte[] GeneratePIC(long size, long layerbreak = BDLayerSize, bool exactIRD = false)
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{
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// Validate size
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if (size == 0 || (size % SectorSize) != 0)
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throw new ArgumentException("ISO Size in bytes must be a positive integer multiple of 2048", nameof(size));
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// Validate layerbreak
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if (layerbreak == 0 || (layerbreak != BDLayerSize && layerbreak >= size))
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throw new ArgumentException("Layerbreak in bytes must be a positive integer less than the ISO Size", nameof(size));
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// TODO: Generate correct PICs for Hybrid PS3 discs (BD-50 with layerbreak value other than 12219392)
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byte[] pic;
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if (size > BDLayerSize) // if BD-50
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{
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// num_sectors + layer_sector_end (0x00100000) + sectors_between_layers (0x01358C00 - 0x00CA73FE) - 3
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byte[] total_sectors = BitConverter.GetBytes((uint)(size / SectorSize + 8067071));
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// Initial portion of PIC (24 bytes)
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pic = new byte[]{
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// [4098 bytes] [2x 0x00] ["DI"] [v1] [10units] [DI num]
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0x10, 0x02, 0x00, 0x00, 0x44, 0x49, 0x01, 0x10, 0x00, 0x00, 0x20, 0x00,
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// ["BDR"] [2 layers]
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0x42, 0x44, 0x4F, 0x01, 0x21, 0x01, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
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// Total sectors used on disc (4 bytes)
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total_sectors[3], total_sectors[2], total_sectors[1], total_sectors[0],
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// 1st Layer sector start location (4 bytes)
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0x00, 0x10, 0x00, 0x00,
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// 1st Layer sector end location (4 bytes)
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0x00, 0xCA, 0x73, 0xFE,
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// 32 bytes of zeros
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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// Initial portion of PIC again, for 2nd layer
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// ["DI"] [v1] [11unit][DI num]
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0x44, 0x49, 0x01, 0x11, 0x00, 0x01, 0x20, 0x00,
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// ["BDR"] [2 layers]
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0x42, 0x44, 0x4F, 0x01, 0x21, 0x01, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
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// Total sectors used on disc
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total_sectors[3], total_sectors[2], total_sectors[1], total_sectors[0],
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// 2nd Layer sector start location
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0x01, 0x35, 0x8C, 0x00,
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// 2nd Layer sector end location
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0x01, 0xEF, 0xFF, 0xFE,
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// Remaining 32 bytes are zeroes
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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// 3k3y style: 0x03 at last byte
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if (exactIRD)
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pic[114] = 0x03;
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}
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else // if BD-25
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{
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// Total sectors used on disc: num_sectors + layer_sector_end (0x00100000) - 1
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byte[] total_sectors = BitConverter.GetBytes((uint)(size / SectorSize + 1048575));
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// Layer sector end location: num_sectors + layer_sector_end (0x00100000) - 2
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byte[] end_sector = BitConverter.GetBytes((uint)(size / SectorSize + 1048574));
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// Initial portion of PIC (24 bytes)
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pic = new byte[]{ 0x10, 0x02, 0x00, 0x00, 0x44, 0x49, 0x01, 0x08, 0x00, 0x00, 0x20, 0x00,
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0x42, 0x44, 0x4F, 0x01, 0x11, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
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// Total sectors used on disc (4 bytes)
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total_sectors[3], total_sectors[2], total_sectors[1], total_sectors[0],
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// Layer sector start location (4 bytes)
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0x00, 0x10, 0x00, 0x00,
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// Layer sector end location (4 bytes)
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end_sector[3], end_sector[2], end_sector[1], end_sector[0],
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// Remaining 79 bytes are zeroes
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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}
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return pic;
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}
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/// <summary>
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/// Generates the UID field by computing the CRC32 hash of the ISO
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/// </summary>
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/// <param name="isoPath">Path to the ISO</param>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="FileNotFoundException"></exception>
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private static uint GenerateUID(string isoPath)
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{
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// Validate ISO path
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if (isoPath == null || isoPath.Length <= 0)
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throw new ArgumentNullException(nameof(isoPath));
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// Check file exists
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var iso = new FileInfo(isoPath);
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if (!iso.Exists)
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throw new FileNotFoundException(nameof(isoPath));
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// Compute CRC32 hash
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byte[] crc32;
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using (FileStream fs = File.OpenRead(isoPath))
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{
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Crc32 hasher = new();
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hasher.Append(fs);
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crc32 = hasher.GetCurrentHash();
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}
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// Redump ISO CRC32 hash is used as the Unique ID in the reproducible IRD
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return BitConverter.ToUInt32(crc32, 0);
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}
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/// <summary>
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/// Calculates ISO file size
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/// </summary>
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/// <param name="isoPath">Path to the ISO</param>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="FileNotFoundException"></exception>
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private static long CalculateSize(string isoPath)
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{
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// Validate ISO path
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if (isoPath == null || isoPath.Length <= 0)
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throw new ArgumentNullException(nameof(isoPath));
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// Check file exists
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var iso = new FileInfo(isoPath);
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if (!iso.Exists)
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throw new FileNotFoundException(nameof(isoPath));
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// Calculate file size
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return iso.Length;
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}
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#endregion
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}
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}
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