// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : AppleSingle.cs // Author(s) : Natalia Portillo // // Component : Filters. // // --[ Description ] ---------------------------------------------------------- // // Provides a filter to open AppleSingle files. // // --[ License ] -------------------------------------------------------------- // // This library is free software; you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as // published by the Free Software Foundation; either version 2.1 of the // License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, see . // // ---------------------------------------------------------------------------- // Copyright © 2011-2019 Natalia Portillo // ****************************************************************************/ using System; using System.IO; using System.Linq; using System.Runtime.InteropServices; using DiscImageChef.CommonTypes.Interfaces; using Marshal = DiscImageChef.Helpers.Marshal; namespace DiscImageChef.Filters { /// /// Decodes AppleSingle files /// public class AppleSingle : IFilter { const uint AppleSingleMagic = 0x00051600; const uint AppleSingleVersion = 0x00010000; const uint AppleSingleVersion2 = 0x00020000; readonly byte[] DOSHome = { 0x4D, 0x53, 0x2D, 0x44, 0x4F, 0x53, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }; readonly byte[] MacintoshHome = { 0x4D, 0x61, 0x63, 0x69, 0x6E, 0x74, 0x6F, 0x73, 0x68, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }; readonly byte[] OSXHome = { 0x4D, 0x61, 0x63, 0x20, 0x4F, 0x53, 0x20, 0x58, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }; readonly byte[] ProDOSHome = { 0x50, 0x72, 0x6F, 0x44, 0x4F, 0x53, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }; readonly byte[] UNIXHome = { 0x55, 0x6E, 0x69, 0x78, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }; readonly byte[] VMSHome = { 0x56, 0x41, 0x58, 0x20, 0x56, 0x4D, 0x53, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }; string basePath; byte[] bytes; DateTime creationTime; AppleSingleEntry dataFork; AppleSingleHeader header; bool isBytes, isStream, isPath, opened; DateTime lastWriteTime; AppleSingleEntry rsrcFork; Stream stream; public string Name => "AppleSingle"; public Guid Id => new Guid("A69B20E8-F4D3-42BB-BD2B-4A7263394A05"); public string Author => "Natalia Portillo"; public void Close() { bytes = null; stream?.Close(); isBytes = false; isStream = false; isPath = false; opened = false; } public string GetBasePath() => basePath; public DateTime GetCreationTime() => creationTime; public long GetDataForkLength() => dataFork.length; public Stream GetDataForkStream() { if(dataFork.length == 0) return null; if(isBytes) return new OffsetStream(bytes, dataFork.offset, dataFork.offset + dataFork.length - 1); if(isStream) return new OffsetStream(stream, dataFork.offset, dataFork.offset + dataFork.length - 1); if(isPath) return new OffsetStream(basePath, FileMode.Open, FileAccess.Read, dataFork.offset, dataFork.offset + dataFork.length - 1); return null; } public string GetFilename() => Path.GetFileName(basePath); public DateTime GetLastWriteTime() => lastWriteTime; public long GetLength() => dataFork.length + rsrcFork.length; public string GetParentFolder() => Path.GetDirectoryName(basePath); public string GetPath() => basePath; public long GetResourceForkLength() => rsrcFork.length; public Stream GetResourceForkStream() { if(rsrcFork.length == 0) return null; if(isBytes) return new OffsetStream(bytes, rsrcFork.offset, rsrcFork.offset + rsrcFork.length - 1); if(isStream) return new OffsetStream(stream, rsrcFork.offset, rsrcFork.offset + rsrcFork.length - 1); if(isPath) return new OffsetStream(basePath, FileMode.Open, FileAccess.Read, rsrcFork.offset, rsrcFork.offset + rsrcFork.length - 1); return null; } public bool HasResourceFork() => rsrcFork.length > 0; public bool Identify(byte[] buffer) { if(buffer == null || buffer.Length < 26) return false; byte[] hdr_b = new byte[26]; Array.Copy(buffer, 0, hdr_b, 0, 26); header = Marshal.ByteArrayToStructureBigEndian(hdr_b); return header.magic == AppleSingleMagic && (header.version == AppleSingleVersion || header.version == AppleSingleVersion2); } public bool Identify(Stream stream) { if(stream == null || stream.Length < 26) return false; byte[] hdr_b = new byte[26]; stream.Seek(0, SeekOrigin.Begin); stream.Read(hdr_b, 0, 26); header = Marshal.ByteArrayToStructureBigEndian(hdr_b); return header.magic == AppleSingleMagic && (header.version == AppleSingleVersion || header.version == AppleSingleVersion2); } public bool Identify(string path) { FileStream fstream = new FileStream(path, FileMode.Open, FileAccess.Read); if(fstream.Length < 26) return false; byte[] hdr_b = new byte[26]; fstream.Read(hdr_b, 0, 26); header = Marshal.ByteArrayToStructureBigEndian(hdr_b); fstream.Close(); return header.magic == AppleSingleMagic && (header.version == AppleSingleVersion || header.version == AppleSingleVersion2); } public bool IsOpened() => opened; public void Open(byte[] buffer) { MemoryStream ms = new MemoryStream(buffer); ms.Seek(0, SeekOrigin.Begin); byte[] hdr_b = new byte[26]; ms.Read(hdr_b, 0, 26); header = Marshal.ByteArrayToStructureBigEndian(hdr_b); AppleSingleEntry[] entries = new AppleSingleEntry[header.entries]; for(int i = 0; i < header.entries; i++) { byte[] entry = new byte[12]; ms.Read(entry, 0, 12); entries[i] = Marshal.ByteArrayToStructureBigEndian(entry); } creationTime = DateTime.UtcNow; lastWriteTime = creationTime; foreach(AppleSingleEntry entry in entries) switch((AppleSingleEntryID)entry.id) { case AppleSingleEntryID.DataFork: dataFork = entry; break; case AppleSingleEntryID.FileDates: ms.Seek(entry.offset, SeekOrigin.Begin); byte[] dates_b = new byte[16]; ms.Read(dates_b, 0, 16); AppleSingleFileDates dates = Marshal.ByteArrayToStructureBigEndian(dates_b); creationTime = DateHandlers.UnixUnsignedToDateTime(dates.creationDate); lastWriteTime = DateHandlers.UnixUnsignedToDateTime(dates.modificationDate); break; case AppleSingleEntryID.FileInfo: ms.Seek(entry.offset, SeekOrigin.Begin); byte[] finfo = new byte[entry.length]; ms.Read(finfo, 0, finfo.Length); if(MacintoshHome.SequenceEqual(header.homeFilesystem)) { AppleSingleMacFileInfo macinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.MacToDateTime(macinfo.creationDate); lastWriteTime = DateHandlers.MacToDateTime(macinfo.modificationDate); } else if(ProDOSHome.SequenceEqual(header.homeFilesystem)) { AppleSingleProDOSFileInfo prodosinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.MacToDateTime(prodosinfo.creationDate); lastWriteTime = DateHandlers.MacToDateTime(prodosinfo.modificationDate); } else if(UNIXHome.SequenceEqual(header.homeFilesystem)) { AppleSingleUNIXFileInfo unixinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.UnixUnsignedToDateTime(unixinfo.creationDate); lastWriteTime = DateHandlers.UnixUnsignedToDateTime(unixinfo.modificationDate); } else if(DOSHome.SequenceEqual(header.homeFilesystem)) { AppleSingleDOSFileInfo dosinfo = Marshal.ByteArrayToStructureBigEndian(finfo); lastWriteTime = DateHandlers.DosToDateTime(dosinfo.modificationDate, dosinfo.modificationTime); } break; case AppleSingleEntryID.ResourceFork: rsrcFork = entry; break; } ms.Close(); opened = true; isBytes = true; bytes = buffer; } public void Open(Stream stream) { stream.Seek(0, SeekOrigin.Begin); byte[] hdr_b = new byte[26]; stream.Read(hdr_b, 0, 26); header = Marshal.ByteArrayToStructureBigEndian(hdr_b); AppleSingleEntry[] entries = new AppleSingleEntry[header.entries]; for(int i = 0; i < header.entries; i++) { byte[] entry = new byte[12]; stream.Read(entry, 0, 12); entries[i] = Marshal.ByteArrayToStructureBigEndian(entry); } creationTime = DateTime.UtcNow; lastWriteTime = creationTime; foreach(AppleSingleEntry entry in entries) switch((AppleSingleEntryID)entry.id) { case AppleSingleEntryID.DataFork: dataFork = entry; break; case AppleSingleEntryID.FileDates: stream.Seek(entry.offset, SeekOrigin.Begin); byte[] dates_b = new byte[16]; stream.Read(dates_b, 0, 16); AppleSingleFileDates dates = Marshal.ByteArrayToStructureBigEndian(dates_b); creationTime = DateHandlers.MacToDateTime(dates.creationDate); lastWriteTime = DateHandlers.MacToDateTime(dates.modificationDate); break; case AppleSingleEntryID.FileInfo: stream.Seek(entry.offset, SeekOrigin.Begin); byte[] finfo = new byte[entry.length]; stream.Read(finfo, 0, finfo.Length); if(MacintoshHome.SequenceEqual(header.homeFilesystem)) { AppleSingleMacFileInfo macinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.MacToDateTime(macinfo.creationDate); lastWriteTime = DateHandlers.MacToDateTime(macinfo.modificationDate); } else if(ProDOSHome.SequenceEqual(header.homeFilesystem)) { AppleSingleProDOSFileInfo prodosinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.MacToDateTime(prodosinfo.creationDate); lastWriteTime = DateHandlers.MacToDateTime(prodosinfo.modificationDate); } else if(UNIXHome.SequenceEqual(header.homeFilesystem)) { AppleSingleUNIXFileInfo unixinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.UnixUnsignedToDateTime(unixinfo.creationDate); lastWriteTime = DateHandlers.UnixUnsignedToDateTime(unixinfo.modificationDate); } else if(DOSHome.SequenceEqual(header.homeFilesystem)) { AppleSingleDOSFileInfo dosinfo = Marshal.ByteArrayToStructureBigEndian(finfo); lastWriteTime = DateHandlers.DosToDateTime(dosinfo.modificationDate, dosinfo.modificationTime); } break; case AppleSingleEntryID.ResourceFork: rsrcFork = entry; break; } stream.Seek(0, SeekOrigin.Begin); opened = true; isStream = true; this.stream = stream; } public void Open(string path) { FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read); fs.Seek(0, SeekOrigin.Begin); byte[] hdr_b = new byte[26]; fs.Read(hdr_b, 0, 26); header = Marshal.ByteArrayToStructureBigEndian(hdr_b); AppleSingleEntry[] entries = new AppleSingleEntry[header.entries]; for(int i = 0; i < header.entries; i++) { byte[] entry = new byte[12]; fs.Read(entry, 0, 12); entries[i] = Marshal.ByteArrayToStructureBigEndian(entry); } creationTime = DateTime.UtcNow; lastWriteTime = creationTime; foreach(AppleSingleEntry entry in entries) switch((AppleSingleEntryID)entry.id) { case AppleSingleEntryID.DataFork: dataFork = entry; break; case AppleSingleEntryID.FileDates: fs.Seek(entry.offset, SeekOrigin.Begin); byte[] dates_b = new byte[16]; fs.Read(dates_b, 0, 16); AppleSingleFileDates dates = Marshal.ByteArrayToStructureBigEndian(dates_b); creationTime = DateHandlers.MacToDateTime(dates.creationDate); lastWriteTime = DateHandlers.MacToDateTime(dates.modificationDate); break; case AppleSingleEntryID.FileInfo: fs.Seek(entry.offset, SeekOrigin.Begin); byte[] finfo = new byte[entry.length]; fs.Read(finfo, 0, finfo.Length); if(MacintoshHome.SequenceEqual(header.homeFilesystem)) { AppleSingleMacFileInfo macinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.MacToDateTime(macinfo.creationDate); lastWriteTime = DateHandlers.MacToDateTime(macinfo.modificationDate); } else if(ProDOSHome.SequenceEqual(header.homeFilesystem)) { AppleSingleProDOSFileInfo prodosinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.MacToDateTime(prodosinfo.creationDate); lastWriteTime = DateHandlers.MacToDateTime(prodosinfo.modificationDate); } else if(UNIXHome.SequenceEqual(header.homeFilesystem)) { AppleSingleUNIXFileInfo unixinfo = Marshal.ByteArrayToStructureBigEndian(finfo); creationTime = DateHandlers.UnixUnsignedToDateTime(unixinfo.creationDate); lastWriteTime = DateHandlers.UnixUnsignedToDateTime(unixinfo.modificationDate); } else if(DOSHome.SequenceEqual(header.homeFilesystem)) { AppleSingleDOSFileInfo dosinfo = Marshal.ByteArrayToStructureBigEndian(finfo); lastWriteTime = DateHandlers.DosToDateTime(dosinfo.modificationDate, dosinfo.modificationTime); } break; case AppleSingleEntryID.ResourceFork: rsrcFork = entry; break; } fs.Close(); opened = true; isPath = true; basePath = path; } enum AppleSingleEntryID : uint { Invalid = 0, DataFork = 1, ResourceFork = 2, RealName = 3, Comment = 4, Icon = 5, ColorIcon = 6, FileInfo = 7, FileDates = 8, FinderInfo = 9, MacFileInfo = 10, ProDOSFileInfo = 11, DOSFileInfo = 12, ShortName = 13, AFPFileInfo = 14, DirectoryID = 15 } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct AppleSingleHeader { public uint magic; public uint version; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] homeFilesystem; public ushort entries; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct AppleSingleEntry { public uint id; public uint offset; public uint length; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct AppleSingleFileDates { public uint creationDate; public uint modificationDate; public uint backupDate; public uint accessDate; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct AppleSingleMacFileInfo { public uint creationDate; public uint modificationDate; public uint backupDate; public uint accessDate; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct AppleSingleUNIXFileInfo { public uint creationDate; public uint accessDate; public uint modificationDate; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct AppleSingleDOSFileInfo { public ushort modificationDate; public ushort modificationTime; public ushort attributes; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct AppleSingleProDOSFileInfo { public uint creationDate; public uint modificationDate; public uint backupDate; public ushort access; public ushort fileType; public uint auxType; } } }