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services: openssh: Warn about 'password-authentication?' default. 

Fixes <https://bugs.gnu.org/44808>.
Reported by Christopher Lemmer Webber <cwebber@dustycloud.org>.

* gnu/services/ssh.scm (true-but-soon-false): New procedure.
(<openssh-configuration>)[password-authentication?]: Change default to
'true-but-soon-false'.
* gnu/installer/services.scm (%system-services): Explicitly set
'password-authentication?' to #f.
This commit is contained in:
Ludovic Courtès 2020-12-07 12:34:26 +01:00
parent 859b362f81
commit aecd2a13cb
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2 changed files with 22 additions and 4 deletions
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8
gnu/installer/services.scm
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@ -1,6 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Guix.
@ -93,7 +93,11 @@
(system-service
(name (G_ "OpenSSH secure shell daemon (sshd)"))
(type 'networking)
(snippet '((service openssh-service-type))))
(snippet '((service openssh-service-type
(openssh-configuration
;; Currently the default is #t but it's considered
;; unsafe. Explicitly pass #f.
(password-authentication? #f))))))
(system-service
(name (G_ "Tor anonymous network router"))
(type 'networking)

18
gnu/services/ssh.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2016 Julien Lepiller <julien@lepiller.eu>
;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
@ -33,6 +33,9 @@
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (guix modules)
#:use-module ((guix i18n) #:select (G_))
#:use-module ((guix diagnostics) #:select (warning source-properties->location))
#:use-module ((guix memoization) #:select (mlambda))
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
@ -276,6 +279,16 @@ The other options should be self-descriptive."
;;; OpenSSH.
;;;
(define true-but-soon-false
(mlambda (loc)
;; The plan is to change the default 'password-authentication?' to #f in
;; Guix 1.3.0 or so. See <https://issues.guix.gnu.org/44808>.
(warning (source-properties->location loc)
(G_ "The default value of the 'password-authentication?'
field of 'openssh-configuration' will change from #true to #false in the
future. Explicitly set it to #true to allow password authentication.~%"))
#t))
(define-record-type* <openssh-configuration>
openssh-configuration make-openssh-configuration
openssh-configuration?
@ -296,7 +309,8 @@ The other options should be self-descriptive."
(default #f))
;; Boolean
(password-authentication? openssh-configuration-password-authentication?
(default #t))
(default (true-but-soon-false
(current-source-location))))
;; Boolean
(public-key-authentication? openssh-configuration-public-key-authentication?
(default #t))