mirror of
https://github.com/MacPaw/XADMaster.git
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439 lines
13 KiB
Objective-C
439 lines
13 KiB
Objective-C
/*
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* XADLZHParser.m
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*
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* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#import "XADLZHParser.h"
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#import "XADLZHStaticHandle.h"
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#import "XADLZHDynamicHandle.h"
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#import "XADLArcHandles.h"
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#import "XADPMArc1Handle.h"
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#import "XADLZHOldHandles.h"
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#import "XADCRCHandle.h"
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#import "NSDateXAD.h"
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@implementation XADLZHParser
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+(int)requiredHeaderSize { return 7; }
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+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name
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{
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const uint8_t *bytes=[data bytes];
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int length=[data length];
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if(length<7) return NO;
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if(bytes[2]=='-'&&bytes[3]=='l'&&bytes[4]=='h'&&bytes[6]=='-') // lzh files
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{
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if(bytes[5]=='0'||bytes[5]=='1') return YES; // uncompressed and old
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if(bytes[5]=='2'||bytes[5]=='3') return YES; // old experimental
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if(bytes[5]=='4'||bytes[5]=='5'||bytes[5]=='6'||bytes[5]=='7') return YES; // new
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if(bytes[5]=='d') return YES; // directory
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}
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if(bytes[2]=='-'&&bytes[3]=='l'&&bytes[4]=='z'&&bytes[6]=='-') // larc files
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{
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if(bytes[5]=='0'||bytes[5]=='4'||bytes[5]=='5') return YES;
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}
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if(bytes[2]=='-'&&bytes[3]=='p'&&bytes[4]=='m'&&bytes[6]=='-') // pmarc files
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{
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if(bytes[5]=='0'||bytes[5]=='1'||bytes[5]=='2') return YES;
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}
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return NO;
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}
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-(void)parseWithSeparateMacForks
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{
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CSHandle *fh=[self handle];
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int guessedos=0;
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while([self shouldKeepParsing] && ![fh atEndOfFile])
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{
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off_t start=[fh offsetInFile];
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uint8_t b1=[fh readUInt8];
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if(b1==0) break;
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uint8_t b2=[fh readUInt8];
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int firstword=b1|(b2<<8);
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uint8_t method[5];
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[fh readBytes:5 toBuffer:method];
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uint32_t compsize=[fh readUInt32LE];
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uint32_t size=[fh readUInt32LE];
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uint32_t time=[fh readUInt32LE];
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int attrs=[fh readUInt8];
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int level=[fh readUInt8];
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NSString *compname=[[[NSString alloc] initWithBytes:method length:5 encoding:NSISOLatin1StringEncoding] autorelease];
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NSMutableDictionary *dict=[NSMutableDictionary dictionaryWithObjectsAndKeys:
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[NSNumber numberWithUnsignedInt:size],XADFileSizeKey,
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[self XADStringWithString:compname],XADCompressionNameKey,
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[NSNumber numberWithInt:level],@"LHAHeaderLevel",
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nil];
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uint32_t headersize;
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int os;
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if(level==0||level==1)
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{
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headersize=(firstword&0xff)+2;
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[dict setObject:[NSDate XADDateWithMSDOSDateTime:time] forKey:XADLastModificationDateKey];
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int namelen=[fh readUInt8];
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uint8_t namebuffer[namelen];
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[fh readBytes:namelen toBuffer:namebuffer];
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int actualnamelen=0;
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while(actualnamelen<namelen)
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{
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if(namebuffer[actualnamelen]==0)
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{
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[dict setObject:[self XADStringWithBytes:&namebuffer[actualnamelen+1]
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length:namelen-actualnamelen-1] forKey:XADCommentKey];
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break;
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}
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actualnamelen++;
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}
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[dict setObject:[NSData dataWithBytes:namebuffer length:actualnamelen] forKey:@"LHAHeaderFileNameData"];
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int crc=[fh readUInt16LE];
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[dict setObject:[NSNumber numberWithInt:crc] forKey:@"LHACRC16"];
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if(level==1)
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{
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os=[fh readUInt8];
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[dict setObject:[NSNumber numberWithInt:os] forKey:@"LHAOS"];
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for(;;)
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{
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int extsize=[fh readUInt16LE];
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if(extsize==0) break;
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headersize+=extsize;
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compsize-=extsize;
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[self parseExtendedForDictionary:dict size:extsize-2];
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}
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}
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}
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else if(level==2)
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{
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[self reportInterestingFileWithReason:@"LZH level 2 file"];
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headersize=firstword;
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[dict setObject:[NSDate dateWithTimeIntervalSince1970:time] forKey:XADLastModificationDateKey];
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int crc=[fh readUInt16LE];
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[dict setObject:[NSNumber numberWithInt:crc] forKey:@"LHACRC16"];
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os=[fh readUInt8];
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for(;;)
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{
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int extsize=[fh readUInt16LE];
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if(extsize==0) break;
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[self parseExtendedForDictionary:dict size:extsize-2];
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}
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}
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else if(level==3)
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{
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[self reportInterestingFileWithReason:@"LZH level 3 file"];
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if(firstword!=4) [XADException raiseNotSupportedException];
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[dict setObject:[NSDate dateWithTimeIntervalSince1970:time] forKey:XADLastModificationDateKey];
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int crc=[fh readUInt16LE];
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[dict setObject:[NSNumber numberWithInt:crc] forKey:@"LHACRC16"];
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os=[fh readUInt8];
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headersize=[fh readUInt32LE];
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for(;;)
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{
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int extsize=[fh readUInt32LE];
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if(extsize==0) break;
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[self parseExtendedForDictionary:dict size:extsize-4];
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}
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}
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else { [XADException raiseIllegalDataException]; for(;;); }
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if(level==0)
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{
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if(!guessedos)
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{
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NSString *name=[self filename];
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if([name matchedByPattern:@"\\.(lha|run)$"
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options:REG_ICASE]) guessedos='A';
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else guessedos='M';
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}
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if(guessedos=='M')
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{
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[dict setObject:[self XADStringWithString:@"MS-DOS"] forKey:@"LHAGuessedOSName"];
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[dict setObject:[NSNumber numberWithInt:attrs] forKey:XADDOSFileAttributesKey];
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}
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else
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{
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[dict setObject:[self XADStringWithString:@"Amiga"] forKey:@"LHAGuessedOSName"];
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[dict setObject:[NSNumber numberWithInt:attrs] forKey:XADAmigaProtectionBitsKey];
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}
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}
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else
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{
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[dict setObject:[NSNumber numberWithInt:os] forKey:@"LHAOS"];
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NSString *osname=nil;
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switch(os)
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{
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case 'M': osname=@"MS-DOS"; break;
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case '2': osname=@"OS/2"; break;
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case '9': osname=@"OS9"; break;
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case 'K': osname=@"OS/68K"; break;
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case '3': osname=@"OS/386"; break;
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case 'H': osname=@"HUMAN"; break;
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case 'U': osname=@"Unix"; break;
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case 'C': osname=@"CP/M"; break;
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case 'F': osname=@"FLEX"; break;
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case 'm': osname=@"Mac OS"; break;
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case 'w': osname=@"Windows 95, 98"; break;
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case 'W': osname=@"Windows NT"; break;
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case 'R': osname=@"Runser"; break;
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case 'T': osname=@"TownsOS"; break;
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case 'X': osname=@"XOSK"; break;
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//case '': methodname=@""; break;
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}
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if(osname) [dict setObject:[self XADStringWithString:osname] forKey:@"LHAOSName"];
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[dict setObject:[NSNumber numberWithInt:attrs] forKey:XADDOSFileAttributesKey];
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if(os=='m')
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{
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[self setIsMacArchive:YES];
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[dict setObject:[NSNumber numberWithBool:YES] forKey:XADMightBeMacBinaryKey];
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}
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}
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[dict setValue:[NSNumber numberWithUnsignedInt:compsize] forKey:XADCompressedSizeKey];
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[dict setValue:[NSNumber numberWithUnsignedInt:compsize] forKey:XADDataLengthKey];
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[dict setValue:[NSNumber numberWithLongLong:start+headersize] forKey:XADDataOffsetKey];
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if(memcmp(method,"-lhd-",5)==0) [dict setValue:[NSNumber numberWithBool:YES] forKey:XADIsDirectoryKey];
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NSData *filenamedata=[dict objectForKey:@"LHAExtFileNameData"];
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if(!filenamedata) filenamedata=[dict objectForKey:@"LHAHeaderFileNameData"];
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NSData *directorydata=[dict objectForKey:@"LHAExtDirectoryData"];
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XADPath *path=nil;
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if(directorydata)
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{
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path=[self XADPathWithData:directorydata separators:"\xff"];
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if(filenamedata&&[filenamedata length])
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path=[path pathByAppendingXADStringComponent:[self XADStringWithData:filenamedata]];
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}
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else if(filenamedata)
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{
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path=[self XADPathWithData:filenamedata separators:"\xff\\/"];
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}
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if(path) [dict setObject:path forKey:XADFileNameKey];
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[self addEntryWithDictionary:dict];
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[fh seekToFileOffset:start+headersize+compsize];
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}
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}
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-(void)parseExtendedForDictionary:(NSMutableDictionary *)dict size:(int)size
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{
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CSHandle *fh=[self handle];
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off_t nextpos=[fh offsetInFile]+size;
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switch([fh readUInt8])
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{
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case 0x01:
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[dict setObject:[fh readDataOfLength:size-1] forKey:@"LHAExtFileNameData"];
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break;
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case 0x02:
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[dict setObject:[fh readDataOfLength:size-1] forKey:@"LHAExtDirectoryData"];
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break;
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case 0x3f:
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case 0x71:
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[dict setObject:[self XADStringWithData:[fh readDataOfLength:size-1]] forKey:XADCommentKey];
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break;
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case 0x40:
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADDOSFileAttributesKey];
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break;
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case 0x41:
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[dict setObject:[NSDate XADDateWithWindowsFileTimeLow:[fh readUInt32LE]
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high:[fh readUInt32LE]] forKey:XADCreationDateKey];
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[dict setObject:[NSDate XADDateWithWindowsFileTimeLow:[fh readUInt32LE]
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high:[fh readUInt32LE]] forKey:XADLastModificationDateKey];
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[dict setObject:[NSDate XADDateWithWindowsFileTimeLow:[fh readUInt32LE]
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high:[fh readUInt32LE]] forKey:XADLastAccessDateKey];
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break;
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case 0x42:
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// 64-bit file sizes
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[self reportInterestingFileWithReason:@"64-bit file"];
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[XADException raiseNotSupportedException];
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break;
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case 0x50:
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADPosixPermissionsKey];
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break;
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case 0x51:
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADPosixGroupKey];
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADPosixUserKey];
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break;
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case 0x52:
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[dict setObject:[self XADStringWithData:[fh readDataOfLength:size-1]] forKey:XADPosixGroupNameKey];
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break;
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case 0x53:
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[dict setObject:[self XADStringWithData:[fh readDataOfLength:size-1]] forKey:XADPosixUserNameKey];
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break;
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case 0x54:
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[dict setObject:[NSDate dateWithTimeIntervalSince1970:[fh readUInt32LE]] forKey:XADLastModificationDateKey];
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break;
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case 0x7f:
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADDOSFileAttributesKey];
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADPosixPermissionsKey];
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADPosixGroupKey];
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[dict setObject:[NSNumber numberWithInt:[fh readUInt16LE]] forKey:XADPosixUserKey];
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[dict setObject:[NSDate dateWithTimeIntervalSince1970:[fh readUInt32LE]] forKey:XADCreationDateKey];
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[dict setObject:[NSDate dateWithTimeIntervalSince1970:[fh readUInt32LE]] forKey:XADLastModificationDateKey];
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break;
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// case 0xc4: // compressed comment, -lh5- 4096
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// case 0xc5: // compressed comment, -lh5- 8192
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// case 0xc6: // compressed comment, -lh5- 16384
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// case 0xc7: // compressed comment, -lh5- 32768
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// case 0xc8: // compressed comment, -lh5- 65536
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case 0xff:
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[dict setObject:[NSNumber numberWithInt:[fh readUInt32LE]] forKey:XADPosixPermissionsKey];
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[dict setObject:[NSNumber numberWithInt:[fh readUInt32LE]] forKey:XADPosixGroupKey];
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[dict setObject:[NSNumber numberWithInt:[fh readUInt32LE]] forKey:XADPosixUserKey];
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[dict setObject:[NSDate dateWithTimeIntervalSince1970:[fh readUInt32LE]] forKey:XADCreationDateKey];
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[dict setObject:[NSDate dateWithTimeIntervalSince1970:[fh readUInt32LE]] forKey:XADLastModificationDateKey];
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break;
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}
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[fh seekToFileOffset:nextpos];
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}
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-(CSHandle *)rawHandleForEntryWithDictionary:(NSDictionary *)dict wantChecksum:(BOOL)checksum
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{
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CSHandle *handle=[self handleAtDataOffsetForDictionary:dict];
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off_t size=[[dict objectForKey:XADFileSizeKey] longLongValue];
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NSString *method=[[dict objectForKey:XADCompressionNameKey] string];
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int crc=[[dict objectForKey:@"LHACRC16"] intValue];
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if([method isEqual:@"-lh0-"])
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{
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// no compression, do nothing
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}
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else if([method isEqual:@"-lh1-"])
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{
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handle=[[[XADLZHDynamicHandle alloc] initWithHandle:handle length:size] autorelease];
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}
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else if([method isEqual:@"-lh2-"])
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{
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[self reportInterestingFileWithReason:@"-lh2- compression"];
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handle=[[[XADLZH2Handle alloc] initWithHandle:handle length:size] autorelease];
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}
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else if([method isEqual:@"-lh3-"])
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{
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[self reportInterestingFileWithReason:@"-lh3- compression"];
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handle=[[[XADLZH3Handle alloc] initWithHandle:handle length:size] autorelease];
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}
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else if([method isEqual:@"-lh4-"])
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{
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handle=[[[XADLZHStaticHandle alloc] initWithHandle:handle length:size windowBits:12] autorelease];
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}
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else if([method isEqual:@"-lh5-"])
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{
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handle=[[[XADLZHStaticHandle alloc] initWithHandle:handle length:size windowBits:13] autorelease];
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}
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else if([method isEqual:@"-lh6-"])
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{
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handle=[[[XADLZHStaticHandle alloc] initWithHandle:handle length:size windowBits:15] autorelease];
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}
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else if([method isEqual:@"-lh7-"])
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{
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handle=[[[XADLZHStaticHandle alloc] initWithHandle:handle length:size windowBits:16] autorelease];
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}
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else if([method isEqual:@"-lzs-"])
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{
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handle=[[[XADLArcLZSHandle alloc] initWithHandle:handle length:size] autorelease];
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}
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else if([method isEqual:@"-lz4-"])
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{
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// no compression, do nothing
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}
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else if([method isEqual:@"-lz5-"])
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{
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handle=[[[XADLArcLZ5Handle alloc] initWithHandle:handle length:size] autorelease];
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}
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else if([method isEqual:@"-pm0-"])
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{
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// no compression, do nothing
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}
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else if([method isEqual:@"-pm1-"])
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{
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handle=[[[XADPMArc1Handle alloc] initWithHandle:handle length:size] autorelease];
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}
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else if([method isEqual:@"-pm2-"])
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{
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handle=[[[XADPMArc2Handle alloc] initWithHandle:handle length:size] autorelease];
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}
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else // not supported
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{
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[self reportInterestingFileWithReason:@"Unsupported compression method %@",method];
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return nil;
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}
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if(checksum) handle=[XADCRCHandle IBMCRC16HandleWithHandle:handle length:size correctCRC:crc conditioned:NO];
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return handle;
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}
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-(NSString *)formatName { return @"LZH"; }
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@end
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