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digest_file_auth(8)					   digest_file_auth(8)

NAME
       digest_file_auth - File based digest authentication helper for Squid.

       Version 1.0

SYNOPSIS
       digest_file_auth [-c] file

DESCRIPTION
       digest_file_auth	 is  an	 installed  binary  authentication program for
       Squid. It handles  digest  authentication  protocol  and	 authenticates
       against a text file backend.

OPTIONS
       -c	   Accept digest hashed passwords rather than plaintext in the
		   password file

CONFIGURATION
       Username database file format:

       - comment lines are possible and should start with a '#';

       - empty or blank lines are possible;

       - plaintext entry format is username:password

       - HA1 entry format is username:realm:HA1

       To build a directory integrated backend, you need to be able to	calcu‐
       late  the  HA1 returned to squid. To avoid storing a plaintext password
       you can calculate MD5(username:realm:password) when  the	 user  changes
       their  password, and store the tuple username:realm:HA1.	 then find the
       matching username:realm when squid asks for the HA1.

       This implementation could be improved by using such a  triple  for  the
       file  format.   However	storing	 such  a triple does little to improve
       security: If compromised the username:realm:HA1 combination is  "plain‐
       text equivalent" - for the purposes of digest authentication they allow
       the user access. Password syncronisation is not	tackled	 by  digest  -
       just preventing on the wire compromise.

AUTHOR
       This program was written by Robert Collins <robertc@squid-cache.org>

       Based on prior work by Arjan de Vet <Arjan.deVet@adv.iae.nl>

       This  manual  was  written  by Robert Collins <robertc@squid-cache.org>
       Amos Jeffries <amosjeffries@squid-cache.org>

COPYRIGHT
       This program and documentation is copyright to the authors named above.

       Distributed under the GNU General Public License (GNU GPL) version 2 or
       later (GPLv2+).

QUESTIONS
       Questions  on  the usage of this program can be sent to the Squid Users
       mailing list <squid-users@squid-cache.org>

REPORTING BUGS
       Bug reports  need  to  be  made	in  English.   See  http://wiki.squid-
       cache.org/SquidFaq/BugReporting for details of what you need to include
       with your bug report.

       Report bugs or bug fixes using http://bugs.squid-cache.org/

       Report serious security bugs to Squid Bugs <squid-bugs@squid-cache.org>

       Report ideas for new improvements to the Squid Developers mailing  list
       <squid-dev@squid-cache.org>

SEE ALSO
       squid(8), GPL(7),
       The Squid FAQ wiki http://wiki.squid-cache.org/SquidFaq
       The Squid Configuration Manual http://www.squid-cache.org/Doc/config/

							   digest_file_auth(8)
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