digest_file_auth(8) System Manager's Manual digest_file_auth(8) NAME digest_file_auth - File based digest authentication helper for Squid. Version 1.1 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. This program will automatically detect the existence of a concurrency channel-ID and adjust appropriately. It may be used with any value 0 or above for the auth_param children concurrency= parameter. 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 pass- word, and store the tuple username:realm:HA1. then find the matching user- name: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. Pass- word synchronization 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 * Copyright (C) 1996-2026 The Squid Software Foundation and contributors * * Squid software is distributed under GPLv2+ license and includes * contributions from numerous individuals and organizations. * Please see the COPYING and CONTRIBUTORS files for details. 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 mail- ing list <squid-users@lists.squid-cache.org> REPORTING BUGS Bug reports need to be made in English. See https://wiki.squid- cache.org/SquidFaq/BugReporting for details of what you need to include with your bug report. Report bugs or bug fixes using https://bugs.squid-cache.org/ Report serious security bugs to Squid Bugs <squid-bugs@lists.squid- cache.org> Report ideas for new improvements to the Squid Developers mailing list <squid-dev@lists.squid-cache.org> SEE ALSO squid(8), GPL(7), The Squid FAQ wiki https://wiki.squid-cache.org/SquidFaq The Squid Configuration Manual http://www.squid-cache.org/Doc/config/ digest_file_auth(8)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONFIGURATION | AUTHOR | COPYRIGHT | QUESTIONS | REPORTING BUGS | SEE ALSO
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