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authorDavid Craven <david@craven.ch>2016-07-13 18:13:12 +0200
committerLudovic Courtès <ludo@gnu.org>2016-07-15 17:57:28 +0200
commit71b0601a97da9f12f76de0480c341e06acf8f2bc (patch)
tree88e3a83884eb0d0ed1afae58c298512c89971b00
parent2102ae2e30a23b3202f4eeabdc8f37eeb16de691 (diff)
downloadguix-71b0601a97da9f12f76de0480c341e06acf8f2bc.tar
guix-71b0601a97da9f12f76de0480c341e06acf8f2bc.tar.gz
services: Add 'dropbear-service'.
* gnu/services/ssh.scm (<dropbear-configuration>): New record type. (dropbear-activation, dropbear-shepherd-service, dropbear-service): New procedures. (dropbear-service-type): New variable. * doc/guix.texi (Networking Services): Document it. Co-authored-by: Ludovic Courtès <ludo@gnu.org>
-rw-r--r--doc/guix.texi43
-rw-r--r--gnu/services/ssh.scm97
2 files changed, 134 insertions, 6 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 4b55473c93..a2732deded 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -7754,7 +7754,7 @@ In addition, @var{extra-settings} specifies a string to append to the
configuration file.
@end deffn
-Furthermore, @code{(gnu services ssh)} provides the following service.
+Furthermore, @code{(gnu services ssh)} provides the following services.
@deffn {Scheme Procedure} lsh-service [#:host-key "/etc/lsh/host-key"] @
[#:daemonic? #t] [#:interfaces '()] [#:port-number 22] @
@@ -7792,6 +7792,47 @@ root.
The other options should be self-descriptive.
@end deffn
+@deffn {Scheme Procedure} dropbear-service [@var{config}]
+Run the @uref{https://matt.ucc.asn.au/dropbear/dropbear.html,Dropbear SSH
+daemon} with the given @var{config}, a @code{<dropbear-configuration>}
+object.
+
+For example, to specify a Dropbear service listening on port 1234, add
+this call to the operating system's @code{services} field:
+
+@example
+(dropbear-service (dropbear-configuration
+ (port-number 1234)))
+@end example
+@end deffn
+
+@deftp {Data Type} dropbear-configuration
+This data type represents the configuration of a Dropbear SSH daemon.
+
+@table @asis
+@item @code{dropbear} (default: @var{dropbear})
+The Dropbear package to use.
+
+@item @code{port-number} (default: 22)
+The TCP port where the daemon waits for incoming connections.
+
+@item @code{syslog-output?} (default: @code{#t})
+Whether to enable syslog output.
+
+@item @code{pid-file} (default: @code{"/var/run/dropbear.pid"})
+File name of the daemon's PID file.
+
+@item @code{root-login?} (default: @code{#f})
+Whether to allow @code{root} logins.
+
+@item @code{allow-empty-passwords?} (default: @code{#f})
+Whether to allow empty passwords.
+
+@item @code{password-authentication?} (default: @code{#t})
+Whether to enable password-based authentication.
+@end table
+@end deftp
+
@defvr {Scheme Variable} %facebook-host-aliases
This variable contains a string for use in @file{/etc/hosts}
(@pxref{Host Names,,, libc, The GNU C Library Reference Manual}). Each
diff --git a/gnu/services/ssh.scm b/gnu/services/ssh.scm
index 1eb9382a84..743b5e3805 100644
--- a/gnu/services/ssh.scm
+++ b/gnu/services/ssh.scm
@@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016 David Craven <david@craven.ch>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -17,14 +18,19 @@
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu services ssh)
- #:use-module (guix gexp)
- #:use-module (guix records)
+ #:use-module (gnu packages ssh)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu system pam)
- #:use-module (gnu packages ssh)
+ #:use-module (guix gexp)
+ #:use-module (guix records)
#:use-module (srfi srfi-26)
- #:export (lsh-service))
+ #:export (lsh-service
+
+ dropbear-configuration
+ dropbear-configuration?
+ dropbear-service-type
+ dropbear-service))
;;; Commentary:
;;;
@@ -235,4 +241,85 @@ The other options should be self-descriptive."
public-key-authentication?)
(initialize? initialize?))))
+
+;;;
+;;; Dropbear.
+;;;
+
+(define-record-type* <dropbear-configuration>
+ dropbear-configuration make-dropbear-configuration
+ dropbear-configuration?
+ (dropbear dropbear-configuration-dropbear
+ (default dropbear))
+ (port-number dropbear-configuration-port-number
+ (default 22))
+ (syslog-output? dropbear-configuration-syslog-output?
+ (default #t))
+ (pid-file dropbear-configuration-pid-file
+ (default "/var/run/dropbear.pid"))
+ (root-login? dropbear-configuration-root-login?
+ (default #f))
+ (allow-empty-passwords? dropbear-configuration-allow-empty-passwords?
+ (default #f))
+ (password-authentication? dropbear-configuration-password-authentication?
+ (default #t)))
+
+(define (dropbear-activation config)
+ "Return the activation gexp for CONFIG."
+ #~(begin
+ (mkdir-p "/etc/dropbear")))
+
+(define (dropbear-shepherd-service config)
+ "Return a <shepherd-service> for dropbear with CONFIG."
+ (define dropbear
+ (dropbear-configuration-dropbear config))
+
+ (define pid-file
+ (dropbear-configuration-pid-file config))
+
+ (define dropbear-command
+ #~(list (string-append #$dropbear "/sbin/dropbear")
+
+ ;; '-R' allows host keys to be automatically generated upon first
+ ;; connection, at a time when /dev/urandom is more likely securely
+ ;; seeded.
+ "-F" "-R"
+
+ "-p" #$(number->string (dropbear-configuration-port-number config))
+ "-P" #$pid-file
+ #$@(if (dropbear-configuration-syslog-output? config) '() '("-E"))
+ #$@(if (dropbear-configuration-root-login? config) '() '("-w"))
+ #$@(if (dropbear-configuration-password-authentication? config)
+ '()
+ '("-s" "-g"))
+ #$@(if (dropbear-configuration-allow-empty-passwords? config)
+ '("-B")
+ '())))
+
+ (define requires
+ (if (dropbear-configuration-syslog-output? config)
+ '(networking syslogd) '(networking)))
+
+ (list (shepherd-service
+ (documentation "Dropbear SSH server.")
+ (requirement requires)
+ (provision '(ssh-daemon))
+ (start #~(make-forkexec-constructor #$dropbear-command
+ #:pid-file #$pid-file))
+ (stop #~(make-kill-destructor)))))
+
+(define dropbear-service-type
+ (service-type (name 'dropbear)
+ (extensions
+ (list (service-extension shepherd-root-service-type
+ dropbear-shepherd-service)
+ (service-extension activation-service-type
+ dropbear-activation)))))
+
+(define* (dropbear-service #:optional (config (dropbear-configuration)))
+ "Run the @uref{https://matt.ucc.asn.au/dropbear/dropbear.html,Dropbear SSH
+daemon} with the given @var{config}, a @code{<dropbear-configuration>}
+object."
+ (service dropbear-service-type config))
+
;;; ssh.scm ends here