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| Subject: | Re: hash of directory |
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| Date: | Wed, 24 Nov 2004 18:18:09 +0200 (IST) |
On Tue, 23 Nov 2004, Geoffrey wrote:
How do you take the hash of a directory? Concatenating all files in that directory and hash the output?I assume we're talking unix here, if so, a directory is a file.
Although on some systems (e.g., Solaris) it is possible to sha1sum directory (or cat directory) on others (e.g., Linux) this will produce an error. But in any case it is possible to convert a directory into some `hashable format', e.g., `ls -l' or Perl's `join ',', stat $filename' for each file. You just have to make sure that your `hashable format' is invariant of allowable transformations, e.g., if you want the hash to be the same after restore of the directory from backup you probably need to sort files, do not include inodes, etc. Regards, ASK ----------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
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