>From cf879a47c8f9b0733fac906cd4bd28dc646aa9fb Mon Sep 17 00:00:00 2001
From: Julien Lepiller
Date: Fri, 5 Aug 2016 15:20:15 +0200
Subject: [PATCH] services: Add openssh
* gnu/packages/ssh.scm: Openssh reads its configuration from /etc
* gnu/services/ssh.scm: Add openssh-service
* doc/guix.texi (Networking Services): Document 'openssh-services'.
---
doc/guix.texi | 34 ++++++++++++++
gnu/packages/ssh.scm | 2 +-
gnu/services/ssh.scm | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++-
3 files changed, 161 insertions(+), 2 deletions(-)
diff --git a/doc/guix.texi b/doc/guix.texi
index 808fbdc..bcd8b6b 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -8199,6 +8199,40 @@ root.
The other options should be self-descriptive.
@end deffn
address@hidden {Scheme Procedure} openssh-service [#:pidfile "/var/run/sshd.pid"] @
+ [#:port-number 22] [#:permit-root-login 'without-password] @
+ [#:allow-empty-passwords #f] [#:password-authentication? #t] @
+ [#:pubkey-authentication? #t] [#:rsa-authentication? #t] @
+ [#:x11-forwarding? #f] [#:protocol-number "2"]
+"Run the @command{sshd} program from @var{openssh} on port @var{port-number}.
address@hidden runs an ssh daemon and writes its PID to @var{pidfile}. It
+understands ssh protocol @var{protocol-number}. The @var{protocol-number} can
+be either 1 or 2.
+
address@hidden takes one of @var{yes}, @var{without-password} and
address@hidden It is used to allow root login through ssh. @var{without-password}
+means that root login is allowed, except when loging with a password (eg: a
+public key).
+
+When @var{allow-empty-passwords?} is true, users with empty passwords may log
+in. When false, they may not.
+
+When @var{password-authentication?} is true, users may log in with their
+password. When false, they have to use other means of authentication.
+
+When @var{pubkey-authentication?} is true, users may log in using public key
+authentication. When false, users have to use other means of authentication.
+Authorized public keys are stored in ~/.ssh/authorized_keys. This is used only
+by protocol 2.
+
+When @var{rsa-authentication?} is true, users may log in using pure RSA
+authentication. When false, users have to use other means of authentication.
+This is used only by protocol 1.
+
+When @var{x11-forwarding} is true, @command{ssh} options -X and -Y will work.
+
address@hidden deffn
+
@deffn {Scheme Procedure} dropbear-service address@hidden
Run the @uref{https://matt.ucc.asn.au/dropbear/dropbear.html,Dropbear SSH
daemon} with the given @var{config}, a @code{}
diff --git a/gnu/packages/ssh.scm b/gnu/packages/ssh.scm
index b2612a4..88bfd06 100644
--- a/gnu/packages/ssh.scm
+++ b/gnu/packages/ssh.scm
@@ -144,7 +144,7 @@ a server that supports the SSH-2 protocol.")
("xauth" ,xauth))) ;for 'ssh -X' and 'ssh -Y'
(arguments
`(#:test-target "tests"
- #:configure-flags '("--sysconfdir=/etc"
+ #:configure-flags '("--sysconfdir=/etc/ssh"
;; Default value of 'PATH' used by sshd.
"--with-default-path=/run/current-system/profile/bin"
diff --git a/gnu/services/ssh.scm b/gnu/services/ssh.scm
index 462988c..5484463 100644
--- a/gnu/services/ssh.scm
+++ b/gnu/services/ssh.scm
@@ -19,9 +19,11 @@
(define-module (gnu services ssh)
#:use-module (gnu packages ssh)
+ #:use-module (gnu packages admin)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu system pam)
+ #:use-module (gnu system shadow)
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (srfi srfi-26)
@@ -30,6 +32,11 @@
lsh-service
lsh-service-type
+ openssh-configuration
+ openssh-configuration?
+ openssh-service-type
+ openssh-service
+
dropbear-configuration
dropbear-configuration?
dropbear-service-type
@@ -244,7 +251,125 @@ The other options should be self-descriptive."
public-key-authentication?)
(initialize? initialize?))))
-
+;;;
+;;; OpenSSH.
+;;;
+
+(define-record-type*
+ openssh-configuration make-openssh-configuration
+ openssh-configuration?
+ (pidfile openssh-configuration-pidfile)
+ (port-number openssh-configuration-port-number)
+ (permit-root-login? openssh-configuration-permit-root-login)
+ (allow-empty-passwords? openssh-configuration-allow-empty-passwords?)
+ (password-authentication? openssh-configuration-password-authentication?)
+ (pubkey-authentication? openssh-configuration-pubkey-authentication?)
+ (rsa-authentication? openssh-configuration-rsa-authentication?)
+ (x11-forwarding? openssh-configuration-x11-forwarding?)
+ (protocol-number openssh-configuration-protocol-number))
+
+(define %openssh-accounts
+ (list (user-group (name "sshd") (system? #t))
+ (user-account
+ (name "sshd")
+ (group "sshd")
+ (system? #t)
+ (comment "sshd privilege separation user")
+ (home-directory "/var/run/sshd")
+ (shell #~(string-append #$shadow "/sbin/nologin")))))
+
+(define (openssh-activation config)
+ "Return the activation GEXP for CONFIG."
+ #~(begin
+ (mkdir-p "/etc/ssh")
+ (mkdir-p (basename #$(openssh-configuration-pidfile config)))
+ (system* (string-append #$openssh "/bin/ssh-keygen") "-A")
+ (call-with-output-file "/etc/ssh/sshd_config"
+ (lambda (port)
+ (display
+ "# Generated by 'openssh-service'.\n"
+ port)
+ (format port "Protocol ~a\n"
+ #$(if (eq? (openssh-configuration-protocol-number config) 1)
+ "1" "2"))
+ (format port "Port ~a\n"
+ #$(number->string (openssh-configuration-port-number config)))
+ (format port "PermitRootLogin ~a\n"
+ #$(if (eq? (openssh-configuration-permit-root-login config) #t)
+ "yes" (if (eq?
+ (openssh-configuration-permit-root-login config)
+ #f)
+ "no" "without-password")))
+ (format port "PermitEmptyPasswords ~a\n"
+ #$(if (openssh-configuration-allow-empty-passwords? config)
+ "yes" "no"))
+ (format port "PasswordAuthentication ~a\n"
+ #$(if (openssh-configuration-password-authentication? config)
+ "yes" "no"))
+ (format port "PubkeyAuthentication ~a\n"
+ #$(if (openssh-configuration-pubkey-authentication? config)
+ "yes" "no"))
+ (format port "RSAAuthentication ~a\n"
+ #$(if (openssh-configuration-rsa-authentication? config)
+ "yes" "no"))
+ (format port "X11Forwarding ~a\n"
+ #$(if (openssh-configuration-x11-forwarding? config)
+ "yes" "no"))
+ (format port "PidFile ~a\n"
+ #$(openssh-configuration-pidfile config))))))
+
+(define (openssh-shepherd-service config)
+ "Return a for openssh with CONFIG."
+
+ (define pid-file
+ (openssh-configuration-pidfile config))
+
+ (define openssh-command
+ #~(list (string-append #$openssh "/sbin/sshd")
+ "-D"))
+
+ (define requires
+ '(networking syslogd))
+
+ (list (shepherd-service
+ (documentation "Openssh SSH server.")
+ (requirement requires)
+ (provision '(ssh-daemon))
+ (start #~(make-forkexec-constructor #$openssh-command
+ #:pid-file #$pid-file))
+ (stop #~(make-kill-destructor)))))
+
+(define openssh-service-type
+ (service-type (name 'openssh)
+ (extensions
+ (list (service-extension shepherd-root-service-type
+ openssh-shepherd-service)
+ (service-extension activation-service-type
+ openssh-activation)
+ (service-extension account-service-type
+ (const %openssh-accounts))))))
+
+(define* (openssh-service #:key
+ (pidfile "/var/run/sshd.pid")
+ (port-number 22)
+ (permit-root-login? 'without-password)
+ (allow-empty-passwords? #f)
+ (password-authentication? #t)
+ (pubkey-authentication? #t)
+ (rsa-authentication? #t)
+ (x11-forwarding? #f)
+ (protocol-number 2))
+ (service openssh-service-type (openssh-configuration (pidfile pidfile)
+ (port-number port-number)
+ (permit-root-login? permit-root-login?)
+ (allow-empty-passwords? allow-empty-passwords?)
+ (password-authentication? password-authentication?)
+ (pubkey-authentication? pubkey-authentication?)
+ (rsa-authentication? rsa-authentication?)
+ (x11-forwarding? x11-forwarding?)
+ (protocol-number protocol-number))))
+
+
;;;
;;; Dropbear.
;;;
--
2.10.0