mirror of
https://github.com/MacPaw/XADMaster.git
synced 2025-08-29 03:23:48 +02:00
74 lines
1.8 KiB
Objective-C
74 lines
1.8 KiB
Objective-C
/*
|
|
* XADXORHandle.m
|
|
*
|
|
* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301 USA
|
|
*/
|
|
#import "XADXORHandle.h"
|
|
|
|
@implementation XADXORHandle
|
|
|
|
-(id)initWithHandle:(CSHandle *)handle password:(NSData *)passdata
|
|
{
|
|
if((self=[super initWithParentHandle:handle]))
|
|
{
|
|
password=[passdata retain];
|
|
passwordbytes=[password bytes];
|
|
passwordlength=[password length];
|
|
}
|
|
return self;
|
|
}
|
|
|
|
-(id)initAsCopyOf:(XADXORHandle *)other
|
|
{
|
|
[self _raiseNotSupported:_cmd];
|
|
return nil;
|
|
}
|
|
|
|
-(void)dealloc
|
|
{
|
|
[password release];
|
|
[super dealloc];
|
|
}
|
|
|
|
|
|
|
|
-(off_t)fileSize { return [parent fileSize]; }
|
|
|
|
-(off_t)offsetInFile { return [parent offsetInFile]; }
|
|
|
|
-(BOOL)atEndOfFile { return [parent atEndOfFile]; }
|
|
|
|
-(void)seekToFileOffset:(off_t)offs { [parent seekToFileOffset:offs]; }
|
|
|
|
-(void)seekToEndOfFile { [parent seekToEndOfFile]; }
|
|
|
|
-(int)readAtMost:(int)num toBuffer:(void *)buffer
|
|
{
|
|
off_t pos=[parent offsetInFile];
|
|
int actual=[parent readAtMost:num toBuffer:buffer];
|
|
|
|
if(passwordlength)
|
|
{
|
|
uint8_t *buf=(uint8_t *)buffer;
|
|
for(int i=0;i<actual;i++) buf[i]^=passwordbytes[(pos+i)%passwordlength];
|
|
}
|
|
|
|
return actual;
|
|
}
|
|
|
|
@end
|