digest_file_auth(8)					      System Manager's Manual					       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 calculate 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 "plaintext 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)