/*
* Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3.0 only,
* as published by the Free Software Foundation.
*
* This program 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
* version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3.0 along with this program. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#import "OFZIPArchiveEntry.h"
#import "OFZIPArchiveEntry+Private.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFStream.h"
#import "OFString.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfRangeException.h"
OFString *
OFZIPArchiveEntryVersionToString(uint16_t version)
{
const char *attrCompat = NULL;
switch (version >> 8) {
case OFZIPArchiveEntryAttributeCompatibilityMSDOS:
attrCompat = "MS-DOS or OS/2";
break;
case OFZIPArchiveEntryAttributeCompatibilityAmiga:
attrCompat = "Amiga";
break;
case OFZIPArchiveEntryAttributeCompatibilityOpenVMS:
attrCompat = "OpenVMS";
break;
case OFZIPArchiveEntryAttributeCompatibilityUNIX:
attrCompat = "UNIX";
break;
case OFZIPArchiveEntryAttributeCompatibilityVM_CMS:
attrCompat = "VM/CMS";
break;
case OFZIPArchiveEntryAttributeCompatibilityAtariST:
attrCompat = "Atari ST";
break;
case OFZIPArchiveEntryAttributeCompatibilityOS2HPFS:
attrCompat = "OS/2 HPFS";
break;
case OFZIPArchiveEntryAttributeCompatibilityMacintosh:
attrCompat = "Macintosh";
break;
case OFZIPArchiveEntryAttributeCompatibilityZSystem:
attrCompat = "Z-System";
break;
case OFZIPArchiveEntryAttributeCompatibilityCPM:
attrCompat = "CP/M";
break;
case OFZIPArchiveEntryAttributeCompatibilityWindowsNTFS:
attrCompat = "Windows NTFS";
break;
case OFZIPArchiveEntryAttributeCompatibilityMVS:
attrCompat = "MVS (OS/390 - Z/OS)";
break;
case OFZIPArchiveEntryAttributeCompatibilityVSE:
attrCompat = "VSE";
break;
case OFZIPArchiveEntryAttributeCompatibilityAcornRISCOS:
attrCompat = "Acorn RISC OS";
break;
case OFZIPArchiveEntryAttributeCompatibilityVFAT:
attrCompat = "VFAT";
break;
case OFZIPArchiveEntryAttributeCompatibilityAlternateMVS:
attrCompat = "Alternate MVS";
break;
case OFZIPArchiveEntryAttributeCompatibilityBeOS:
attrCompat = "BeOS";
break;
case OFZIPArchiveEntryAttributeCompatibilityTandem:
attrCompat = "Tandem";
break;
case OFZIPArchiveEntryAttributeCompatibilityOS400:
attrCompat = "OS/400";
break;
case OFZIPArchiveEntryAttributeCompatibilityOSX:
attrCompat = "OS X (Darwin)";
break;
}
if (attrCompat != NULL)
return [OFString stringWithFormat:
@"%u.%u, %s",
(version & 0xFF) / 10, (version & 0xFF) % 10, attrCompat];
else
return [OFString stringWithFormat:
@"%u.%u, unknown %02X",
(version % 0xFF) / 10, (version & 0xFF) % 10, version >> 8];
}
OFString *
OFZIPArchiveEntryCompressionMethodName(
OFZIPArchiveEntryCompressionMethod compressionMethod)
{
switch (compressionMethod) {
case OFZIPArchiveEntryCompressionMethodNone:
return @"none";
case OFZIPArchiveEntryCompressionMethodShrink:
return @"Shrink";
case OFZIPArchiveEntryCompressionMethodReduceFactor1:
return @"Reduce (factor 1)";
case OFZIPArchiveEntryCompressionMethodReduceFactor2:
return @"Reduce (factor 2)";
case OFZIPArchiveEntryCompressionMethodReduceFactor3:
return @"Reduce (factor 3)";
case OFZIPArchiveEntryCompressionMethodReduceFactor4:
return @"Reduce (factor 4)";
case OFZIPArchiveEntryCompressionMethodImplode:
return @"Implode";
case OFZIPArchiveEntryCompressionMethodDeflate:
return @"Deflate";
case OFZIPArchiveEntryCompressionMethodDeflate64:
return @"Deflate64";
case OFZIPArchiveEntryCompressionMethodBZIP2:
return @"BZip2";
case OFZIPArchiveEntryCompressionMethodLZMA:
return @"LZMA";
case OFZIPArchiveEntryCompressionMethodWavPack:
return @"WavPack";
case OFZIPArchiveEntryCompressionMethodPPMd:
return @"PPMd";
default:
return @"unknown";
}
}
size_t
OFZIPArchiveEntryExtraFieldFind(OFData *extraField,
OFZIPArchiveEntryExtraFieldTag tag, uint16_t *size)
{
const uint8_t *bytes = extraField.items;
size_t count = extraField.count;
for (size_t i = 0; i < count;) {
uint16_t currentTag, currentSize;
if (i + 3 >= count)
@throw [OFInvalidFormatException exception];
currentTag = (bytes[i + 1] << 8) | bytes[i];
currentSize = (bytes[i + 3] << 8) | bytes[i + 2];
if (i + 3 + currentSize >= count)
@throw [OFInvalidFormatException exception];
if (currentTag == tag) {
*size = currentSize;
return i + 4;
}
i += 4 + currentSize;
}
*size = 0;
return OFNotFound;
}
@implementation OFZIPArchiveEntry
/*
* The following are optional in OFArchiveEntry, but Apple GCC 4.0.1 is buggy
* and needs this to stop complaining.
*/
@dynamic POSIXPermissions, ownerAccountID, groupOwnerAccountID;
@dynamic ownerAccountName, groupOwnerAccountName;
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)of_init
{
return [super init];
}
- (instancetype)of_initWithStream: (OFStream *)stream
{
self = [super init];
@try {
void *pool = objc_autoreleasePoolPush();
OFMutableData *extraField = nil;
uint16_t fileNameLength, extraFieldLength, fileCommentLength;
OFStringEncoding encoding;
size_t ZIP64Index;
uint16_t ZIP64Size;
if ([stream readLittleEndianInt32] != 0x02014B50)
@throw [OFInvalidFormatException exception];
_versionMadeBy = [stream readLittleEndianInt16];
_minVersionNeeded = [stream readLittleEndianInt16];
_generalPurposeBitFlag = [stream readLittleEndianInt16];
_compressionMethod = [stream readLittleEndianInt16];
_lastModifiedFileTime = [stream readLittleEndianInt16];
_lastModifiedFileDate = [stream readLittleEndianInt16];
_CRC32 = [stream readLittleEndianInt32];
_compressedSize = [stream readLittleEndianInt32];
_uncompressedSize = [stream readLittleEndianInt32];
fileNameLength = [stream readLittleEndianInt16];
extraFieldLength = [stream readLittleEndianInt16];
fileCommentLength = [stream readLittleEndianInt16];
_startDiskNumber = [stream readLittleEndianInt16];
_internalAttributes = [stream readLittleEndianInt16];
_versionSpecificAttributes = [stream readLittleEndianInt32];
_localFileHeaderOffset = [stream readLittleEndianInt32];
encoding = (_generalPurposeBitFlag & (1u << 11)
? OFStringEncodingUTF8 : OFStringEncodingCodepage437);
_fileName = [[stream readStringWithLength: fileNameLength
encoding: encoding] copy];
if (extraFieldLength > 0)
extraField = [[[stream readDataWithCount:
extraFieldLength] mutableCopy] autorelease];
if (fileCommentLength > 0)
_fileComment = [[stream
readStringWithLength: fileCommentLength
encoding: encoding] copy];
ZIP64Index = OFZIPArchiveEntryExtraFieldFind(extraField,
OFZIPArchiveEntryExtraFieldTagZIP64, &ZIP64Size);
if (ZIP64Index != OFNotFound) {
const uint8_t *ZIP64 =
[extraField itemAtIndex: ZIP64Index];
OFRange range =
OFMakeRange(ZIP64Index - 4, ZIP64Size + 4);
if (_uncompressedSize == 0xFFFFFFFF)
_uncompressedSize = _OFZIPArchiveReadField64(
&ZIP64, &ZIP64Size);
if (_compressedSize == 0xFFFFFFFF)
_compressedSize = _OFZIPArchiveReadField64(
&ZIP64, &ZIP64Size);
if (_localFileHeaderOffset == 0xFFFFFFFF)
_localFileHeaderOffset =
_OFZIPArchiveReadField64(&ZIP64,
&ZIP64Size);
if (_startDiskNumber == 0xFFFF)
_startDiskNumber = _OFZIPArchiveReadField32(
&ZIP64, &ZIP64Size);
if (ZIP64Size > 0 || _localFileHeaderOffset < 0)
@throw [OFInvalidFormatException exception];
[extraField removeItemsInRange: range];
}
if (extraField.count > 0) {
[extraField makeImmutable];
_extraField = [extraField copy];
}
objc_autoreleasePoolPop(pool);
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[_fileName release];
[_extraField release];
[_fileComment release];
[super dealloc];
}
- (id)copy
{
return [self retain];
}
- (id)mutableCopy
{
OFZIPArchiveEntry *copy =
[[OFMutableZIPArchiveEntry alloc] initWithFileName: _fileName];
@try {
copy->_versionMadeBy = _versionMadeBy;
copy->_minVersionNeeded = _minVersionNeeded;
copy->_generalPurposeBitFlag = _generalPurposeBitFlag;
copy->_compressionMethod = _compressionMethod;
copy->_lastModifiedFileTime = _lastModifiedFileTime;
copy->_lastModifiedFileDate = _lastModifiedFileDate;
copy->_CRC32 = _CRC32;
copy->_compressedSize = _compressedSize;
copy->_uncompressedSize = _uncompressedSize;
copy->_extraField = [_extraField copy];
copy->_fileComment = [_extraField copy];
copy->_startDiskNumber = _startDiskNumber;
copy->_internalAttributes = _internalAttributes;
copy->_versionSpecificAttributes = _versionSpecificAttributes;
copy->_localFileHeaderOffset = _localFileHeaderOffset;
} @catch (id e) {
[copy release];
@throw e;
}
return copy;
}
- (OFString *)fileName
{
return _fileName;
}
- (OFString *)fileComment
{
return _fileComment;
}
- (OFData *)extraField
{
return _extraField;
}
- (OFZIPArchiveEntryAttributeCompatibility)versionMadeBy
{
return _versionMadeBy;
}
- (OFZIPArchiveEntryAttributeCompatibility)minVersionNeeded
{
return _minVersionNeeded;
}
- (OFDate *)modificationDate
{
void *pool = objc_autoreleasePoolPush();
uint16_t year = ((_lastModifiedFileDate & 0xFE00) >> 9) + 1980;
uint8_t month = (_lastModifiedFileDate & 0x1E0) >> 5;
uint8_t day = (_lastModifiedFileDate & 0x1F);
uint8_t hour = (_lastModifiedFileTime & 0xF800) >> 11;
uint8_t minute = (_lastModifiedFileTime & 0x7E0) >> 5;
uint8_t second = (_lastModifiedFileTime & 0x1F) << 1;
OFDate *date;
OFString *dateString;
dateString = [OFString
stringWithFormat: @"%04u-%02u-%02u %02u:%02u:%02u",
year, month, day, hour, minute, second];
date = [[OFDate alloc] initWithLocalDateString: dateString
format: @"%Y-%m-%d %H:%M:%S"];
objc_autoreleasePoolPop(pool);
return [date autorelease];
}
- (OFZIPArchiveEntryCompressionMethod)compressionMethod
{
return _compressionMethod;
}
- (unsigned long long)compressedSize
{
return _compressedSize;
}
- (unsigned long long)uncompressedSize
{
return _uncompressedSize;
}
- (uint32_t)CRC32
{
return _CRC32;
}
- (uint32_t)versionSpecificAttributes
{
return _versionSpecificAttributes;
}
- (uint16_t)generalPurposeBitFlag
{
return _generalPurposeBitFlag;
}
- (uint16_t)of_lastModifiedFileTime
{
return _lastModifiedFileTime;
}
- (uint16_t)of_lastModifiedFileDate
{
return _lastModifiedFileDate;
}
- (uint32_t)of_startDiskNumber
{
return _startDiskNumber;
}
- (int64_t)of_localFileHeaderOffset
{
return _localFileHeaderOffset;
}
- (OFString *)description
{
void *pool = objc_autoreleasePoolPush();
OFString *compressionMethod =
OFZIPArchiveEntryCompressionMethodName(_compressionMethod);
OFString *ret = [OFString stringWithFormat:
@"<%@:\n"
@"\tFile name = %@\n"
@"\tFile comment = %@\n"
@"\tGeneral purpose bit flag = %u\n"
@"\tCompressed size = %llu\n"
@"\tUncompressed size = %llu\n"
@"\tCompression method = %@\n"
@"\tModification date = %@\n"
@"\tCRC32 = %08" @PRIX32 @"\n"
@"\tExtra field = %@\n"
@">",
self.class, _fileName, _fileComment, _generalPurposeBitFlag,
_compressedSize, _uncompressedSize, compressionMethod,
self.modificationDate, _CRC32, _extraField];
[ret retain];
objc_autoreleasePoolPop(pool);
return [ret autorelease];
}
- (uint64_t)of_writeToStream: (OFStream *)stream
{
void *pool = objc_autoreleasePoolPush();
uint64_t size = 0;
if (UINT16_MAX - _extraField.count < 32)
@throw [OFOutOfRangeException exception];
[stream writeLittleEndianInt32: 0x02014B50];
[stream writeLittleEndianInt16: _versionMadeBy];
[stream writeLittleEndianInt16: _minVersionNeeded];
[stream writeLittleEndianInt16: _generalPurposeBitFlag];
[stream writeLittleEndianInt16: _compressionMethod];
[stream writeLittleEndianInt16: _lastModifiedFileTime];
[stream writeLittleEndianInt16: _lastModifiedFileDate];
[stream writeLittleEndianInt32: _CRC32];
[stream writeLittleEndianInt32: 0xFFFFFFFF];
[stream writeLittleEndianInt32: 0xFFFFFFFF];
[stream writeLittleEndianInt16: (uint16_t)_fileName.UTF8StringLength];
[stream writeLittleEndianInt16: (uint16_t)_extraField.count + 32];
[stream writeLittleEndianInt16:
(uint16_t)_fileComment.UTF8StringLength];
[stream writeLittleEndianInt16: 0xFFFF];
[stream writeLittleEndianInt16: _internalAttributes];
[stream writeLittleEndianInt32: _versionSpecificAttributes];
[stream writeLittleEndianInt32: 0xFFFFFFFF];
size += (4 + (6 * 2) + (3 * 4) + (5 * 2) + (2 * 4));
[stream writeString: _fileName];
size += (uint64_t)_fileName.UTF8StringLength;
[stream writeLittleEndianInt16: OFZIPArchiveEntryExtraFieldTagZIP64];
[stream writeLittleEndianInt16: 28];
[stream writeLittleEndianInt64: _uncompressedSize];
[stream writeLittleEndianInt64: _compressedSize];
[stream writeLittleEndianInt64: _localFileHeaderOffset];
[stream writeLittleEndianInt32: _startDiskNumber];
size += (2 * 2) + (3 * 8) + 4;
if (_extraField != nil)
[stream writeData: _extraField];
size += (uint64_t)_extraField.count;
if (_fileComment != nil)
[stream writeString: _fileComment];
size += (uint64_t)_fileComment.UTF8StringLength;
objc_autoreleasePoolPop(pool);
return size;
}
@end