I keep a database of all my files md5sum's and anytime I download anything I can check it against that db. Keeps me from accidently duplicating files. Useful when you have 100+ gigs of files. Is there any easy way to trick someone by making a replaced file have the same md5 sum by adding in useless bits at the end or something? Just curious if tripwire or similar programs somehow check for something like that.
*^*^*^* Have the courage to take your own thoughts seriously, for they will shape you. -- Albert Einstein
On Wed, 6 Dec 2000, Volker Kuhlmann wrote:
To verify an installed package against a RPM, use:
rpm -Vp packagename.rpm
This of course is trivial for an attacker to circumvent, the RPM database is not really protected at all.
That's why it may be an excellent idea to back up the rpm data base on floppy...
Ok that's a little better but still an attacker can beat it (replace
In theory MD5 can be tricked with, its unlikely (but theoretically possible)
so most people that need a secure hash algorithm use SHA1 (guess what it
stands for =).
Kurt Seifried, seifried@securityportal.com
SecurityPortal - your focal point for security on the 'net
----- Original Message -----
From: "Michael"
binary for example).
... together with the rpm binary (which is statically linked as well for other reasons).
While you're at it, storing md5 sums of at least all the files shown by rpm -qal and all files in /etc is a very good idea too.
Volker
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