/*
* Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <string.h>
#import "OFLHAArchiveEntry.h"
#import "OFLHAArchiveEntry+Private.h"
#import "OFArray.h"
#import "OFCRC16.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFNumber.h"
#import "OFStream.h"
#import "OFString.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfRangeException.h"
#import "OFUnsupportedVersionException.h"
@implementation OFLHAArchiveEntry
static OFDate *
parseMSDOSDate(uint32_t MSDOSDate)
{
uint16_t year = ((MSDOSDate & 0xFE000000) >> 25) + 1980;
uint8_t month = (MSDOSDate & 0x1E00000) >> 21;
uint8_t day = (MSDOSDate & 0x1F);
uint8_t hour = (MSDOSDate & 0xF800) >> 11;
uint8_t minute = (MSDOSDate & 0x7E0) >> 5;
uint8_t second = (MSDOSDate & 0x1F) << 1;
OFString *dateString;
dateString = [OFString
stringWithFormat: @"%04u-%02u-%02u %02u:%02u:%02u",
year, month, day, hour, minute, second];
return [OFDate dateWithLocalDateString: dateString
format: @"%Y-%m-%d %H:%M:%S"];
}
static void
parseFileNameExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
[entry->_fileName release];
entry->_fileName = nil;
entry->_fileName = [[OFString alloc]
initWithCString: (char *)extension.items + 1
encoding: encoding
length: [extension count] - 1];
}
static void
parseDirectoryNameExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
void *pool = objc_autoreleasePoolPush();
OFMutableData *data = [[extension mutableCopy] autorelease];
char *items = data.mutableItems;
size_t count = data.count;
OFMutableString *directoryName;
for (size_t i = 1; i < count; i++)
if (items[i] == '\xFF')
items[i] = '/';
directoryName = [OFMutableString stringWithCString: items + 1
encoding: encoding
length: count - 1];
if (![directoryName hasSuffix: @"/"])
[directoryName appendString: @"/"];
[directoryName makeImmutable];
[entry->_directoryName release];
entry->_directoryName = nil;
entry->_directoryName = [directoryName copy];
objc_autoreleasePoolPop(pool);
}
static void
parseCommentExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
[entry->_fileComment release];
entry->_fileComment = nil;
entry->_fileComment = [[OFString alloc]
initWithCString: (char *)extension.items + 1
encoding: encoding
length: extension.count - 1];
}
static void
parsePermissionsExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
uint16_t mode;
if (extension.count != 3)
@throw [OFInvalidFormatException exception];
memcpy(&mode, (char *)extension.items + 1, 2);
mode = OFFromLittleEndian16(mode);
[entry->_mode release];
entry->_mode = nil;
entry->_mode = [[OFNumber alloc] initWithUnsignedShort: mode];
}
static void
parseGIDUIDExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
uint16_t UID, GID;
if (extension.count != 5)
@throw [OFInvalidFormatException exception];
memcpy(&GID, (char *)extension.items + 1, 2);
GID = OFFromLittleEndian16(GID);
memcpy(&UID, (char *)extension.items + 3, 2);
UID = OFFromLittleEndian16(UID);
[entry->_GID release];
entry->_GID = nil;
[entry->_UID release];
entry->_UID = nil;
entry->_GID = [[OFNumber alloc] initWithUnsignedShort: GID];
entry->_UID = [[OFNumber alloc] initWithUnsignedShort: UID];
}
static void
parseGroupExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
[entry->_group release];
entry->_group = nil;
entry->_group = [[OFString alloc]
initWithCString: (char *)extension.items + 1
encoding: encoding
length: extension.count - 1];
}
static void
parseOwnerExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
[entry->_owner release];
entry->_owner = nil;
entry->_owner = [[OFString alloc]
initWithCString: (char *)extension.items + 1
encoding: encoding
length: extension.count - 1];
}
static void
parseModificationDateExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding)
{
uint32_t modificationDate;
if (extension.count != 5)
@throw [OFInvalidFormatException exception];
memcpy(&modificationDate, (char *)extension.items + 1, 4);
modificationDate = OFFromLittleEndian32(modificationDate);
[entry->_modificationDate release];
entry->_modificationDate = nil;
entry->_modificationDate = [[OFDate alloc]
initWithTimeIntervalSince1970: modificationDate];
}
static bool
parseExtension(OFLHAArchiveEntry *entry, OFData *extension,
OFStringEncoding encoding, bool allowFileName)
{
void (*function)(OFLHAArchiveEntry *, OFData *, OFStringEncoding) =
NULL;
switch (*(char *)[extension itemAtIndex: 0]) {
case 0x01:
if (allowFileName)
function = parseFileNameExtension;
break;
case 0x02:
function = parseDirectoryNameExtension;
break;
case 0x3F:
function = parseCommentExtension;
break;
case 0x50:
function = parsePermissionsExtension;
break;
case 0x51:
function = parseGIDUIDExtension;
break;
case 0x52:
function = parseGroupExtension;
break;
case 0x53:
function = parseOwnerExtension;
break;
case 0x54:
function = parseModificationDateExtension;
break;
}
if (function == NULL)
return false;
function(entry, extension, encoding);
return true;
}
static void
readExtensions(OFLHAArchiveEntry *entry, OFStream *stream,
OFStringEncoding encoding, bool allowFileName)
{
uint16_t size;
while ((size = [stream readLittleEndianInt16]) > 0) {
OFData *extension;
if (size < 2)
@throw [OFInvalidFormatException exception];
extension = [stream readDataWithCount: size - 2];
if (!parseExtension(entry, extension, encoding, allowFileName))
[entry->_extensions addObject: extension];
if (entry->_headerLevel == 1) {
if (entry->_compressedSize < size)
@throw [OFInvalidFormatException exception];
entry->_compressedSize -= size;
}
}
}
static void
getFileNameAndDirectoryName(OFLHAArchiveEntry *entry, OFStringEncoding encoding,
const char **fileName, size_t *fileNameLength,
const char **directoryName, size_t *directoryNameLength)
{
OFMutableData *data;
char *cString;
size_t length;
size_t pos;
/*
* We use OFMutableData to have an autoreleased buffer that we can
* return indirectly.
*/
data = [OFMutableData
dataWithItems: [entry->_directoryName cStringWithEncoding: encoding]
count: [entry->_directoryName
cStringLengthWithEncoding: encoding]];
[data addItems: [entry->_fileName cStringWithEncoding: encoding]
count: [entry->_fileName cStringLengthWithEncoding: encoding]];
cString = data.mutableItems;
length = data.count;
pos = 0;
for (size_t i = 0; i < length; i++) {
if (cString[i] == '/' || cString[i] == '\\') {
cString[i] = '\xFF';
pos = i + 1;
}
}
*fileName = cString + pos;
*fileNameLength = length - pos;
*directoryName = cString;
*directoryNameLength = pos;
}
+ (instancetype)entryWithFileName: (OFString *)fileName
{
return [[[self alloc] initWithFileName: fileName] autorelease];
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithFileName: (OFString *)fileName
{
self = [super init];
@try {
_fileName = [fileName copy];
_compressionMethod = @"-lh0-";
_date = [[OFDate alloc] initWithTimeIntervalSince1970: 0];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)of_initWithHeader: (char [21])header
stream: (OFStream *)stream
encoding: (OFStringEncoding)encoding
{
self = [super init];
@try {
uint32_t date;
_compressionMethod = [[OFString alloc]
initWithCString: header + 2
encoding: OFStringEncodingASCII
length: 5];
memcpy(&_compressedSize, header + 7, 4);
_compressedSize = OFFromLittleEndian32(_compressedSize);
memcpy(&_uncompressedSize, header + 11, 4);
_uncompressedSize = OFFromLittleEndian32(_uncompressedSize);
memcpy(&date, header + 15, 4);
date = OFFromLittleEndian32(date);
_headerLevel = header[20];
_extensions = [[OFMutableArray alloc] init];
switch (_headerLevel) {
case 0:
case 1:;
void *pool = objc_autoreleasePoolPush();
uint8_t fileNameLength;
OFString *tmp;
_date = [parseMSDOSDate(date) retain];
fileNameLength = [stream readInt8];
tmp = [stream readStringWithLength: fileNameLength
encoding: encoding];
tmp = [tmp stringByReplacingOccurrencesOfString: @"\\"
withString: @"/"];
_fileName = [tmp copy];
_CRC16 = [stream readLittleEndianInt16];
if (_headerLevel == 1) {
_operatingSystemIdentifier = [stream readInt8];
readExtensions(self, stream, encoding, false);
}
objc_autoreleasePoolPop(pool);
break;
case 2:
_date = [[OFDate alloc]
initWithTimeIntervalSince1970: date];
_CRC16 = [stream readLittleEndianInt16];
_operatingSystemIdentifier = [stream readInt8];
readExtensions(self, stream, encoding, true);
break;
default:;
OFString *version = [OFString
stringWithFormat: @"%u", _headerLevel];
@throw [OFUnsupportedVersionException
exceptionWithVersion: version];
}
if (_fileName == nil)
@throw [OFInvalidFormatException exception];
[_extensions makeImmutable];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[_compressionMethod release];
[_fileName release];
[_directoryName release];
[_date release];
[_fileComment release];
[_mode release];
[_UID release];
[_GID release];
[_owner release];
[_group release];
[_extensions release];
[super dealloc];
}
- (id)copy
{
return [self retain];
}
- (id)mutableCopy
{
OFLHAArchiveEntry *copy = [[OFMutableLHAArchiveEntry alloc]
initWithFileName: _fileName];
@try {
[copy->_compressionMethod release];
copy->_compressionMethod = nil;
[copy->_date release];
copy->_date = nil;
copy->_directoryName = [_directoryName copy];
copy->_compressionMethod = [_compressionMethod copy];
copy->_compressedSize = _compressedSize;
copy->_uncompressedSize = _uncompressedSize;
copy->_date = [_date copy];
copy->_headerLevel = _headerLevel;
copy->_CRC16 = _CRC16;
copy->_operatingSystemIdentifier = _operatingSystemIdentifier;
copy->_fileComment = [_fileComment copy];
copy->_mode = [_mode retain];
copy->_UID = [_UID retain];
copy->_GID = [_GID retain];
copy->_owner = [_owner copy];
copy->_group = [_group copy];
copy->_modificationDate = [_modificationDate retain];
copy->_extensions = [_extensions copy];
} @catch (id e) {
[copy release];
@throw e;
}
return copy;
}
- (OFString *)fileName
{
if (_directoryName == nil)
return _fileName;
return [_directoryName stringByAppendingString: _fileName];
}
- (OFString *)compressionMethod
{
return _compressionMethod;
}
- (uint32_t)compressedSize
{
return _compressedSize;
}
- (uint32_t)uncompressedSize
{
return _uncompressedSize;
}
- (OFDate *)date
{
return _date;
}
- (uint8_t)headerLevel
{
return _headerLevel;
}
- (uint16_t)CRC16
{
return _CRC16;
}
- (uint8_t)operatingSystemIdentifier
{
return _operatingSystemIdentifier;
}
- (OFString *)fileComment
{
return _fileComment;
}
- (OFNumber *)mode
{
return _mode;
}
- (OFNumber *)UID
{
return _UID;
}
- (OFNumber *)GID
{
return _GID;
}
- (OFString *)owner
{
return _owner;
}
- (OFString *)group
{
return _group;
}
- (OFDate *)modificationDate
{
return _modificationDate;
}
- (OFArray OF_GENERIC(OFData *) *)extensions
{
return _extensions;
}
- (void)of_writeToStream: (OFStream *)stream
encoding: (OFStringEncoding)encoding
{
void *pool = objc_autoreleasePoolPush();
OFMutableData *data = [OFMutableData dataWithCapacity: 24];
const char *fileName, *directoryName;
size_t fileNameLength, directoryNameLength;
uint16_t tmp16;
uint32_t tmp32;
size_t headerSize;
if ([_compressionMethod cStringLengthWithEncoding:
OFStringEncodingASCII] != 5)
@throw [OFInvalidArgumentException exception];
getFileNameAndDirectoryName(self, encoding, &fileName, &fileNameLength,
&directoryName, &directoryNameLength);
if (fileNameLength > UINT16_MAX - 3 ||
directoryNameLength > UINT16_MAX - 3)
@throw [OFOutOfRangeException exception];
/* Length. Filled in after we're done. */
[data increaseCountBy: 2];
[data addItems: [_compressionMethod
cStringWithEncoding: OFStringEncodingASCII]
count: 5];
tmp32 = OFToLittleEndian32(_compressedSize);
[data addItems: &tmp32 count: sizeof(tmp32)];
tmp32 = OFToLittleEndian32(_uncompressedSize);
[data addItems: &tmp32 count: sizeof(tmp32)];
tmp32 = OFToLittleEndian32((uint32_t)_date.timeIntervalSince1970);
[data addItems: &tmp32 count: sizeof(tmp32)];
/* Reserved */
[data increaseCountBy: 1];
/* Header level */
[data addItem: "\x02"];
/* CRC16 */
tmp16 = OFToLittleEndian16(_CRC16);
[data addItems: &tmp16 count: sizeof(tmp16)];
/* Operating system identifier */
[data addItem: "U"];
/* Common header. Contains CRC16, which is written at the end. */
tmp16 = OFToLittleEndian16(5);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x00"];
[data increaseCountBy: 2];
tmp16 = OFToLittleEndian16((uint16_t)fileNameLength + 3);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x01"];
[data addItems: fileName count: fileNameLength];
if (directoryNameLength > 0) {
tmp16 = OFToLittleEndian16((uint16_t)directoryNameLength + 3);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x02"];
[data addItems: directoryName count: directoryNameLength];
}
if (_fileComment != nil) {
size_t fileCommentLength =
[_fileComment cStringLengthWithEncoding: encoding];
if (fileCommentLength > UINT16_MAX - 3)
@throw [OFOutOfRangeException exception];
tmp16 = OFToLittleEndian16((uint16_t)fileCommentLength + 3);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x3F"];
[data addItems: [_fileComment cStringWithEncoding: encoding]
count: fileCommentLength];
}
if (_mode != nil) {
tmp16 = OFToLittleEndian16(5);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x50"];
tmp16 = OFToLittleEndian16(_mode.unsignedShortValue);
[data addItems: &tmp16 count: sizeof(tmp16)];
}
if (_UID != nil || _GID != nil) {
if (_UID == nil || _GID == nil)
@throw [OFInvalidArgumentException exception];
tmp16 = OFToLittleEndian16(7);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x51"];
tmp16 = OFToLittleEndian16(_GID.unsignedShortValue);
[data addItems: &tmp16 count: sizeof(tmp16)];
tmp16 = OFToLittleEndian16(_UID.unsignedShortValue);
[data addItems: &tmp16 count: sizeof(tmp16)];
}
if (_group != nil) {
size_t groupLength =
[_group cStringLengthWithEncoding: encoding];
if (groupLength > UINT16_MAX - 3)
@throw [OFOutOfRangeException exception];
tmp16 = OFToLittleEndian16((uint16_t)groupLength + 3);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x52"];
[data addItems: [_group cStringWithEncoding: encoding]
count: groupLength];
}
if (_owner != nil) {
size_t ownerLength =
[_owner cStringLengthWithEncoding: encoding];
if (ownerLength > UINT16_MAX - 3)
@throw [OFOutOfRangeException exception];
tmp16 = OFToLittleEndian16((uint16_t)ownerLength + 3);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x53"];
[data addItems: [_owner cStringWithEncoding: encoding]
count: ownerLength];
}
if (_modificationDate != nil) {
tmp16 = OFToLittleEndian16(7);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItem: "\x54"];
tmp32 = OFToLittleEndian32(
(uint32_t)_modificationDate.timeIntervalSince1970);
[data addItems: &tmp32 count: sizeof(tmp32)];
}
for (OFData *extension in _extensions) {
size_t extensionLength = extension.count;
if (extension.itemSize != 1)
@throw [OFInvalidArgumentException exception];
if (extensionLength > UINT16_MAX - 2)
@throw [OFOutOfRangeException exception];
tmp16 = OFToLittleEndian16((uint16_t)extensionLength + 2);
[data addItems: &tmp16 count: sizeof(tmp16)];
[data addItems: extension.items count: extension.count];
}
/* Zero-length extension to terminate */
[data increaseCountBy: 2];
headerSize = data.count;
if (headerSize > UINT16_MAX)
@throw [OFOutOfRangeException exception];
/* Now fill in the size and CRC16 for the entire header */
tmp16 = OFToLittleEndian16(headerSize);
memcpy([data mutableItemAtIndex: 0], &tmp16, sizeof(tmp16));
tmp16 = OFCRC16(0, data.items, data.count);
tmp16 = OFToLittleEndian16(tmp16);
memcpy([data mutableItemAtIndex: 27], &tmp16, sizeof(tmp16));
[stream writeData: data];
objc_autoreleasePoolPop(pool);
}
- (OFString *)description
{
void *pool = objc_autoreleasePoolPush();
OFString *mode = (_mode == nil ? nil
: [OFString stringWithFormat: @"%ho", _mode.unsignedShortValue]);
OFString *extensions = [_extensions.description
stringByReplacingOccurrencesOfString: @"\n"
withString: @"\n\t"];
OFString *ret = [OFString stringWithFormat:
@"<%@:\n"
@"\tFile name = %@\n"
@"\tCompression method = %@\n"
@"\tCompressed size = %" @PRIu32 "\n"
@"\tUncompressed size = %" @PRIu32 "\n"
@"\tDate = %@\n"
@"\tHeader level = %u\n"
@"\tCRC16 = %04" @PRIX16 @"\n"
@"\tOperating system identifier = %c\n"
@"\tComment = %@\n"
@"\tMode = %@\n"
@"\tUID = %@\n"
@"\tGID = %@\n"
@"\tOwner = %@\n"
@"\tGroup = %@\n"
@"\tModification date = %@\n"
@"\tExtensions: %@"
@">",
self.class, self.fileName, _compressionMethod, _compressedSize,
_uncompressedSize, _date, _headerLevel, _CRC16,
_operatingSystemIdentifier, _fileComment, mode, _UID, _GID, _owner,
_group, _modificationDate, extensions];
[ret retain];
objc_autoreleasePoolPop(pool);
return [ret autorelease];
}
@end