* gnu/services/ssh.scm (dropbear-service, ...): New variables.
* doc/guix.texi: New node.
---
doc/guix.texi | 25 ++++++++++++-
gnu/services/ssh.scm | 104 +++++++++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 124 insertions(+), 5 deletions(-)
diff --git a/doc/guix.texi b/doc/guix.texi
index 62c0d34..377004f 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -7695,7 +7695,7 @@ 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] @
@@ -7733,6 +7733,29 @@ root.
The other options should be self-descriptive.
@end deffn
+@deffn {Scheme Procedure} dropbear-service [#:host-key
"/etc/dropbear/dropbear_ecdsa_host-key"] @
+ [#:port-number 22] [#:allow-empty-passwords? #f] @
+ [#:root-login? #f] [#:password-authentication? #t] @
+ [#:syslog-output? #t] [#:initialize? #t]
+Run the @command{dropbear} program from @var{dropbear} to listen on port
@var{port-number}.
+@var{host-key} must designate a file containing the host key, and readable
+only by root.
+
+By default dropbear logs its output to syslogd, unless one sets
+@var{syslog-output?} to false. This also makes dropbear-service depend
+on existence of syslogd service.
+
+When @var{initialize?} is true, @command{dropbear} automatically generates the
+host key upon service activation if it does not exist yet.
+When @var{initialize?} is false, it is up to create a key pair with the private
+key stored in file @var{host-key}. For more information consult the
+@command{dropbearkey} man pages.
+
+@var{allow-empty-passwords?} specifies whether to accept log-ins with empty
+passwords, and @var{root-login?} specifies whether to accept log-ins as
+root.
+@end deffn
+
@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 1eb9382..13a5df1 100644
--- a/gnu/services/ssh.scm
+++ b/gnu/services/ssh.scm
@@ -17,14 +17,15 @@
;;; 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 (dropbear-service
+ lsh-service))
;;; Commentary:
;;;
@@ -235,4 +236,99 @@ The other options should be self-descriptive."
public-key-authentication?)
(initialize? initialize?))))
+;;;
+;;; Dropbear ssh server
+;;;
+
+(define-record-type* <dropbear-configuration>
+ dropbear-configuration make-dropbear-configuration
+ dropbear-configuration?
+ (dropbear dropbear-configuration-dropbear
+ (default dropbear))
+ (host-key dropbear-configuration-host-key)
+ (port-number dropbear-configuration-port-number)
+ (syslog-output? dropbear-configuration-syslog-output?)
+ (pid-file dropbear-configuration-pid-file)
+ (root-login? dropbear-configuration-root-login?)
+ (allow-empty-passwords? dropbear-configuration-allow-empty-passwords?)
+ (password-authentication? dropbear-configuration-password-authentication?)
+ (initialize? dropbear-configuration-initialize?))
+
+(define (dropbear-initialization dropbear host-key)
+ "Return the gexp to initialize the dropbear service for HOST-KEY."
+ #~(begin
+ (unless (file-exists? #$host-key)
+ (mkdir-p (dirname #$host-key))
+ (format #t "creating SSH host key '~a'...~%" #$host-key)
+ (system* (string-append #$dropbear "/bin/dropbearkey")
+ "-t" "ecdsa" "-f" #$host-key))))
+
+(define (dropbear-activation config)
+ "Return the activation gexp for CONFIG."
+ #~(begin
+ #$(if (dropbear-configuration-initialize? config)
+ (dropbear-initialization
+ (dropbear-configuration-dropbear config)
+ (dropbear-configuration-host-key config))
+ #t)))
+
+(define (dropbear-shepherd-service config)
+ "Return a <shepherd-service> for dropbear with CONFIG."
+ (define dropbear (dropbear-configuration-dropbear config))
+
+ (define dropbear-command
+ (append
+ (list
+ #~(string-append #$dropbear "/sbin/dropbear") "-F"
+ "-p" (number->string (dropbear-configuration-port-number config))
+ "-P" (dropbear-configuration-pid-file config)
+ "-r" (dropbear-configuration-host-key config))
+ (if (dropbear-configuration-syslog-output? config) '() '("-E"))
+ (if (dropbear-configuration-root-login? config) '() '("-w"))
+ (if (dropbear-configuration-password-authentication? config) '() '("-s"
"-g"))
+ (if (dropbear-configuration-allow-empty-passwords? config) '("-B") '())))
+
+ (define requires
+ (if (dropbear-configuration-syslog-output? config)
+ '(networking syslogd)
+ '(networking)))
+
+ (list (shepherd-service
+ (documentation "Dropbear ssh server")
+ (requirement requires)
+ (provision '(ssh-daemon))
+ (start #~(make-forkexec-constructor #$@dropbear-command))
+ (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 #:key
+ (dropbear dropbear)
+ (host-key "/etc/dropbear/dropbear_ecdsa_host_key")
+ (port-number 22)
+ (allow-empty-passwords? #f)
+ (root-login? #f)
+ (syslog-output? #t)
+ (pid-file "/var/run/dropbear.pid")
+ (password-authentication? #t)
+ (initialize? #t))
+ "Run the @command{dropbear} daemon from @var{dropbear} to start a ssh
server."
+ (service dropbear-service-type
+ (dropbear-configuration
+ (dropbear dropbear)
+ (host-key host-key)
+ (port-number port-number)
+ (allow-empty-passwords? allow-empty-passwords?)
+ (root-login? root-login?)
+ (syslog-output? syslog-output?)
+ (pid-file pid-file)
+ (password-authentication? password-authentication?)
+ (initialize? initialize?))))
+
;;; ssh.scm ends here
--
2.9.0
