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mxzxz1991
 Post subject: crc
PostPosted: Sat Feb 01, 2020 9:32 pm 

Joined: Sat Sep 14, 2019 4:20 pm
Posts: 9
<file url="Screenshots\\readme.txt" crc="1258410340" size="54" high="0"></file>
where can I find this (crc) 10 digit file code? I would like to assign the same crc to another file
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aluigi
 Post subject: Re: crc
PostPosted: Tue Mar 03, 2020 2:44 pm 
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Joined: Wed Jul 30, 2014 9:32 pm
Posts: 12096
Upload that file Screenshots\\readme.txt so we can check what algorithm and settings are used to calculate that crc
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mxzxz1991
 Post subject: Re: crc
PostPosted: Sat Mar 28, 2020 8:06 pm 

Joined: Sat Sep 14, 2019 4:20 pm
Posts: 9
file


Attachments:
readme.txt [54 Bytes]
Downloaded 109 times
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aluigi
 Post subject: Re: crc
PostPosted: Sat Mar 28, 2020 8:29 pm 
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Joined: Wed Jul 30, 2014 9:32 pm
Posts: 12096
Bingo, it's just the classical FCS32 checksum.
This script for quickbms can show you this value for all the files you select:
Code:
get SIZE asize
encryption crc 0xedb88320 "32 -1 -1 0 0 1"
log MEMORY_FILE 0 SIZE
get NAME filename
print "%QUICKBMS_CRC% %NAME%"
Example:
1258410340 readme.txt
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mxzxz1991
 Post subject: Re: crc
PostPosted: Sun Mar 29, 2020 6:22 pm 

Joined: Sat Sep 14, 2019 4:20 pm
Posts: 9
can it be changed?
I would like to give the same to another file (1258410340)
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aluigi
 Post subject: Re: crc
PostPosted: Mon Mar 30, 2020 8:53 am 
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Joined: Wed Jul 30, 2014 9:32 pm
Posts: 12096
If you can edit the crc field in that configuration file it would be a lot easier.

Anyway crc collisions are possible so you may have some chance but it's not so easy and requires some skills (I can't help you so don't ask).
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