Hi,
This is a tool to combine crcs.
Readme:
What:
This can be used to combine several crc values into one.
How:
combinecrcs <CHUNKSIZE> <CRC> [<CHUNKSIZE> <CRC>]...
Why:
Useful for finding combined crc values of tracks in the redump.org database.
Compiling:
Use "make" on any linux/unix/bsd console nearby, or if you must, an msys or cygwin environment.
You need to use a relatively recent gcc (4.5.0+ ish I guess).
This software uses crcutil-1.0 for providing fast crc calculations.
crcutil is made by Andrew Kadatch and Bob Jenkins and can be found on http://code.google.com/p/crcutil/
Do not contact them for support on this software.
The Makefile will try to pull in version 1.0 through wget if it is not supplied yet.
Small word of caution:
Relying on a crc for checking a complete image is reasonably robust against data corruption.
However, it is not robust for data integrity checking.
Data can easily be faked to produce any crc of ones liking, so a collide is easy to compute.
If you want to be sure about data integrity, use a crypto hash, such as md5 or sha1.
Contact:
At the moment, see the redump.org forum thread where you got this.
-V.Small word of caution:
Relying on a crc for checking a complete image is reasonably robust against data corruption, but not for data integrity checking.
Data can easily be faked to produce any crc of ones liking, so a collide is easy to compute.
If you want to be sure about data integrity, use a crypto hash, such as md5 or sha1.
I updated the 0.1 archives with this warning included in the readme.
Please redownload if yours doesn't contain it.
Source: combinecrcs-0.1.tar.gz
Win32 binary: combinecrcs-0.1-bin-win32.zip
