mirror of
https://github.com/MacPaw/XADMaster.git
synced 2025-08-29 03:23:48 +02:00
72 lines
1.7 KiB
Objective-C
72 lines
1.7 KiB
Objective-C
/*
|
|
* XADMD5Handle.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 "XADMD5Handle.h"
|
|
|
|
@implementation XADMD5Handle
|
|
|
|
-(id)initWithHandle:(CSHandle *)handle length:(off_t)length correctDigest:(NSData *)correctdigest;
|
|
{
|
|
if((self=[super initWithParentHandle:handle length:length]))
|
|
{
|
|
digest=[correctdigest retain];
|
|
}
|
|
return self;
|
|
}
|
|
|
|
-(void)dealloc
|
|
{
|
|
[digest release];
|
|
[super dealloc];
|
|
}
|
|
|
|
-(void)resetStream
|
|
{
|
|
MD5_Init(&context);
|
|
[parent seekToFileOffset:0];
|
|
}
|
|
|
|
-(int)streamAtMost:(int)num toBuffer:(void *)buffer
|
|
{
|
|
int actual=[parent readAtMost:num toBuffer:buffer];
|
|
MD5_Update(&context,buffer,actual);
|
|
return actual;
|
|
}
|
|
|
|
-(BOOL)hasChecksum { return YES; }
|
|
|
|
-(BOOL)isChecksumCorrect
|
|
{
|
|
if([digest length]!=16) return NO;
|
|
|
|
MD5_CTX copy;
|
|
copy=context;
|
|
|
|
uint8_t buf[16];
|
|
MD5_Final(buf,©);
|
|
|
|
return memcmp([digest bytes],buf,16)==0;
|
|
}
|
|
|
|
-(double)estimatedProgress { return [parent estimatedProgress]; }
|
|
|
|
@end
|
|
|
|
|