mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-27 14:52:05 -05:00
613e913836
* gnu/home/services/ssh.scm (serialize-match-criteria): New procedure. (serialize-openssh-host): Use it. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
463 lines
18 KiB
Scheme
463 lines
18 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2022 Ludovic Courtès <ludo@gnu.org>
|
||
;;; Copyright © 2023 Janneke Nieuwenhuizen <janneke@gnu.org>
|
||
;;; Copyright © 2023 Nicolas Graves <ngraves@ngraves.fr>
|
||
;;; Copyright © 2023 Efraim Flashner <efraim@flashner.co.il>
|
||
;;;
|
||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||
;;; under the terms of the GNU General Public License as published by
|
||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||
;;; your option) any later version.
|
||
;;;
|
||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;; GNU General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (gnu home services ssh)
|
||
#:use-module (guix gexp)
|
||
#:use-module (guix records)
|
||
#:use-module (guix deprecation)
|
||
#:use-module (guix diagnostics)
|
||
#:use-module (guix i18n)
|
||
#:use-module (gnu services)
|
||
#:use-module (gnu services configuration)
|
||
#:use-module (guix modules)
|
||
#:use-module (gnu home services)
|
||
#:use-module (gnu home services shepherd)
|
||
#:use-module ((gnu home services utils)
|
||
#:select (object->camel-case-string))
|
||
#:autoload (gnu packages base) (glibc-utf8-locales)
|
||
#:use-module (gnu packages ssh)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-9)
|
||
#:use-module (srfi srfi-9 gnu)
|
||
#:use-module (srfi srfi-34)
|
||
#:use-module (srfi srfi-35)
|
||
#:use-module (ice-9 match)
|
||
#:autoload (ice-9 regex) (string-match match:substring)
|
||
#:export (home-openssh-configuration
|
||
home-openssh-configuration-authorized-keys
|
||
home-openssh-configuration-known-hosts
|
||
home-openssh-configuration-hosts
|
||
home-openssh-configuration-add-keys-to-agent
|
||
home-openssh-configuration?
|
||
|
||
home-ssh-agent-configuration
|
||
home-ssh-agent-openssh
|
||
home-ssh-agent-socket-directory
|
||
home-ssh-agent-extra-options
|
||
home-ssh-agent-configuration?
|
||
|
||
openssh-host
|
||
openssh-host-host-name
|
||
openssh-host-match-criteria
|
||
openssh-host-identity-file
|
||
openssh-host-name
|
||
openssh-host-port
|
||
openssh-host-user
|
||
openssh-host-forward-x11?
|
||
openssh-host-forward-x11-trusted?
|
||
openssh-host-forward-agent?
|
||
openssh-host-compression?
|
||
openssh-host-proxy-command
|
||
openssh-host-host-key-algorithms
|
||
openssh-host-accepted-key-types
|
||
openssh-host-extra-content
|
||
proxy-jump
|
||
proxy-jump-host-name
|
||
proxy-jump-port
|
||
proxy-jump-user
|
||
proxy-command
|
||
proxy-command->string
|
||
|
||
home-openssh-service-type
|
||
home-ssh-agent-service-type))
|
||
|
||
(define (serialize-field-name name)
|
||
(match name
|
||
('accepted-key-types "PubkeyAcceptedKeyTypes")
|
||
(_
|
||
(let ((name (let ((str (symbol->string name)))
|
||
(if (string-suffix? "?" str)
|
||
(string->symbol (string-drop-right str 1))
|
||
name))))
|
||
(object->camel-case-string name 'upper)))))
|
||
|
||
(define (serialize-string field value)
|
||
(string-append " " (serialize-field-name field)
|
||
" " value "\n"))
|
||
|
||
(define (address-family? obj)
|
||
(memv obj (list AF_INET AF_INET6)))
|
||
|
||
(define-maybe address-family)
|
||
|
||
(define (serialize-address-family field family)
|
||
(if (maybe-value-set? family)
|
||
(string-append " " (serialize-field-name field) " "
|
||
(cond ((= family AF_INET) "inet")
|
||
((= family AF_INET6) "inet6")
|
||
;; The 'else' branch is unreachable.
|
||
(else
|
||
(raise
|
||
(formatted-message
|
||
(G_ "~s: invalid address family value")
|
||
family))))
|
||
"\n")
|
||
""))
|
||
|
||
(define (natural-number? obj)
|
||
(and (integer? obj) (exact? obj) (> obj 0)))
|
||
|
||
(define (serialize-natural-number field value)
|
||
(string-append " " (serialize-field-name field) " "
|
||
(number->string value) "\n"))
|
||
|
||
(define-maybe boolean)
|
||
|
||
(define (serialize-boolean field value)
|
||
(string-append " " (serialize-field-name field) " "
|
||
(if value "yes" "no") "\n"))
|
||
|
||
(define-maybe string)
|
||
(define-maybe natural-number)
|
||
|
||
(define (serialize-raw-configuration-string field value)
|
||
(string-append value "\n"))
|
||
(define raw-configuration-string? string?)
|
||
|
||
(define (string-list? lst)
|
||
(and (pair? lst) (every string? lst)))
|
||
(define (serialize-string-list field lst)
|
||
(string-append " " (serialize-field-name field) " "
|
||
(string-join lst ",") "\n"))
|
||
|
||
(define-maybe string-list)
|
||
|
||
(define-record-type <proxy-command>
|
||
(proxy-command command)
|
||
proxy-command?
|
||
(command proxy-command->string))
|
||
|
||
(set-record-type-printer! <proxy-command>
|
||
(lambda (obj port)
|
||
(format port "#<proxy-command ~s>" (proxy-command->string obj))))
|
||
|
||
(define-configuration/no-serialization proxy-jump
|
||
(user
|
||
maybe-string
|
||
"User name on the remote host.")
|
||
(host-name
|
||
(string)
|
||
"Host name---e.g., @code{foo.example.org} or @code{192.168.1.2}.")
|
||
(port
|
||
maybe-natural-number
|
||
"TCP port number to connect to."))
|
||
|
||
(define (proxy-jump->string proxy-jump)
|
||
(match-record proxy-jump <proxy-jump>
|
||
(host-name user port)
|
||
(string-append
|
||
(if (maybe-value-set? user) (string-append user "@") "")
|
||
host-name
|
||
(if (maybe-value-set? port) (string-append ":" (number->string port)) ""))))
|
||
|
||
(define (proxy-command-or-jump-list? x)
|
||
(or (proxy-command? x)
|
||
(and (list? x)
|
||
(every proxy-jump? x))))
|
||
|
||
(define (serialize-proxy-command-or-jump-list field value)
|
||
(if (proxy-command? value)
|
||
(serialize-string 'proxy-command (proxy-command->string value))
|
||
(serialize-string-list 'proxy-jump (map proxy-jump->string value))))
|
||
|
||
(define-maybe proxy-command-or-jump-list)
|
||
|
||
(define (sanitize-proxy-command properties)
|
||
(lambda (value)
|
||
(when (maybe-value-set? value)
|
||
(warn-about-deprecation 'proxy-command properties #:replacement 'proxy))
|
||
(unless (maybe-string? value)
|
||
(configuration-field-error (source-properties->location properties) 'proxy-command value))
|
||
value))
|
||
|
||
(define ssh-match-keywords
|
||
'(canonical final exec host originalhost user localuser))
|
||
|
||
(define (match-criteria? str)
|
||
;; Rule out the case of "all" keyword.
|
||
(if (member str '("all"
|
||
"canonical all"
|
||
"final all"))
|
||
#t
|
||
(let* ((first (string-take str (string-index str #\ )))
|
||
(keyword (string->symbol (if (string-prefix? "!" first)
|
||
(string-drop first 1)
|
||
first))))
|
||
(memq keyword ssh-match-keywords))))
|
||
|
||
(define (serialize-match-criteria _ value)
|
||
(string-append "Match " value "\n"))
|
||
|
||
(define-maybe match-criteria)
|
||
|
||
(define-configuration openssh-host
|
||
(name
|
||
maybe-string
|
||
"Name of this host declaration. A @code{openssh-host} must define only
|
||
@code{name} or @code{match-criteria}. Use host-name @code{\"*\"} for
|
||
top-level options.")
|
||
(host-name
|
||
maybe-string
|
||
"Host name---e.g., @code{\"foo.example.org\"} or @code{\"192.168.1.2\"}.")
|
||
(match-criteria
|
||
maybe-match-criteria
|
||
"When specified, this string denotes the set of hosts to which the entry
|
||
applies, superseding the @code{host-name} field. Its first element must be
|
||
all or one of @code{ssh-match-keywords}. The rest of the elements are
|
||
arguments for the keyword, or other criteria. A @code{openssh-host} must
|
||
define only @code{name} or @code{match-criteria}. Other host configuration
|
||
options will apply to all hosts matching @code{match-criteria}.")
|
||
(address-family
|
||
maybe-address-family
|
||
"Address family to use when connecting to this host: one of
|
||
@code{AF_INET} (for IPv4 only), @code{AF_INET6} (for IPv6 only).
|
||
Additionally, the field can be left unset to allow any address family.")
|
||
(identity-file
|
||
maybe-string
|
||
"The identity file to use---e.g.,
|
||
@code{\"/home/charlie/.ssh/id_ed25519\"}.")
|
||
(port
|
||
maybe-natural-number
|
||
"TCP port number to connect to.")
|
||
(user
|
||
maybe-string
|
||
"User name on the remote host.")
|
||
(forward-x11?
|
||
maybe-boolean
|
||
"Whether to forward remote client connections to the local X11 graphical
|
||
display.")
|
||
(forward-x11-trusted?
|
||
maybe-boolean
|
||
"Whether remote X11 clients have full access to the original X11 graphical
|
||
display.")
|
||
(forward-agent?
|
||
maybe-boolean
|
||
"Whether the authentication agent (if any) is forwarded to the remote
|
||
machine.")
|
||
(compression?
|
||
maybe-boolean
|
||
"Whether to compress data in transit.")
|
||
(proxy-command
|
||
maybe-string
|
||
"The command to use to connect to the server. As an example, a command
|
||
to connect via an HTTP proxy at 192.0.2.0 would be: @code{\"nc -X
|
||
connect -x 192.0.2.0:8080 %h %p\"}. Using 'proxy-command' is deprecated, use
|
||
'proxy' instead."
|
||
(sanitizer (sanitize-proxy-command (current-source-location))))
|
||
(proxy
|
||
maybe-proxy-command-or-jump-list
|
||
"The command to use to connect to the server or a list of SSH hosts to jump
|
||
through before connecting to the server.")
|
||
(host-key-algorithms
|
||
maybe-string-list
|
||
"The list of accepted host key algorithms---e.g.,
|
||
@code{'(\"ssh-ed25519\")}.")
|
||
(accepted-key-types
|
||
maybe-string-list
|
||
"The list of accepted user public key types.")
|
||
(extra-content
|
||
(raw-configuration-string "")
|
||
"Extra content appended as-is to this @code{Host} block in
|
||
@file{~/.ssh/config}."))
|
||
|
||
(define (serialize-openssh-host config)
|
||
(define (openssh-host-name-or-match-field? field)
|
||
(or (eq? (configuration-field-name field) 'name)
|
||
(eq? (configuration-field-name field) 'match-criteria)))
|
||
|
||
(string-append
|
||
(if (maybe-value-set? (openssh-host-name config))
|
||
(if (maybe-value-set? (openssh-host-match-criteria config))
|
||
(raise
|
||
(formatted-message
|
||
(G_ "define either 'name' or 'match-criteria', not both")))
|
||
(string-append "Host " (openssh-host-name config) "\n"))
|
||
(if (maybe-value-set? (openssh-host-match-criteria config))
|
||
(serialize-match-criteria #t (openssh-host-match-criteria config))
|
||
(raise
|
||
(formatted-message
|
||
(G_ "define either 'name' or 'match-criteria' once")))))
|
||
(string-concatenate
|
||
(map (lambda (field)
|
||
((configuration-field-serializer field)
|
||
(configuration-field-name field)
|
||
((configuration-field-getter field) config)))
|
||
(remove openssh-host-name-or-match-field?
|
||
openssh-host-fields)))))
|
||
|
||
(define-record-type* <home-openssh-configuration>
|
||
home-openssh-configuration make-home-openssh-configuration
|
||
home-openssh-configuration?
|
||
(authorized-keys home-openssh-configuration-authorized-keys ;list of file-like
|
||
(default #f))
|
||
(known-hosts home-openssh-configuration-known-hosts ;unspec | list of file-like
|
||
(default *unspecified*))
|
||
(hosts home-openssh-configuration-hosts ;list of <openssh-host>
|
||
(default '()))
|
||
(add-keys-to-agent home-openssh-configuration-add-keys-to-agent ;string with limited values
|
||
(default "no")))
|
||
|
||
(define (serialize-add-keys-to-agent value)
|
||
(define (valid-time-string? str)
|
||
(and (> (string-length str) 0)
|
||
(equal?
|
||
str
|
||
(match:substring
|
||
(string-match "\
|
||
[0-9]+|([0-9]+[Ww])?([0-9]+[Dd])?([0-9]+[Hh])?([0-9]+[Mm])?([0-9]+[Ss])?"
|
||
str)))))
|
||
|
||
(string-append "AddKeysToAgent "
|
||
(cond ((member value '("yes" "no" "confirm" "ask")) value)
|
||
((valid-time-string? value) value)
|
||
((and (string-prefix? "confirm" value)
|
||
(valid-time-string?
|
||
(cdr (string-split value #\ )))) value)
|
||
;; The 'else' branch is unreachable.
|
||
(else
|
||
(raise
|
||
(formatted-message
|
||
(G_ "~s: invalid 'add-keys-to-agent' value")
|
||
value))))))
|
||
|
||
(define (openssh-configuration->string config)
|
||
(string-join
|
||
(cons* (serialize-add-keys-to-agent
|
||
(home-openssh-configuration-add-keys-to-agent config))
|
||
(map serialize-openssh-host
|
||
(home-openssh-configuration-hosts config)))
|
||
"\n"))
|
||
|
||
(define* (file-join name files #:optional (delimiter " "))
|
||
"Return a file in the store called @var{name} that is the concatenation
|
||
of all the file-like objects listed in @var{files}, with @var{delimited}
|
||
inserted after each of them."
|
||
(computed-file name
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
|
||
;; Support non-ASCII file names.
|
||
(setenv "GUIX_LOCPATH"
|
||
#+(file-append glibc-utf8-locales
|
||
"/lib/locale"))
|
||
(setlocale LC_ALL "en_US.utf8")
|
||
|
||
(call-with-output-file #$output
|
||
(lambda (output)
|
||
(for-each (lambda (file)
|
||
(call-with-input-file file
|
||
(lambda (input)
|
||
(dump-port input output)))
|
||
(display #$delimiter output))
|
||
'#$files)))))))
|
||
|
||
(define (openssh-configuration-files config)
|
||
(let* ((ssh-config (plain-file "ssh.conf"
|
||
(openssh-configuration->string config)))
|
||
(known-hosts (home-openssh-configuration-known-hosts config))
|
||
(authorized-keys (home-openssh-configuration-authorized-keys config))
|
||
(authorized-keys (and
|
||
authorized-keys
|
||
(file-join "authorized_keys" authorized-keys "\n"))))
|
||
`(,@(if authorized-keys
|
||
`((".ssh/authorized_keys" ,authorized-keys))
|
||
'())
|
||
,@(if (unspecified? known-hosts)
|
||
'()
|
||
`((".ssh/known_hosts"
|
||
,(file-join "known_hosts" known-hosts "\n"))))
|
||
(".ssh/config" ,ssh-config))))
|
||
|
||
(define openssh-activation
|
||
(with-imported-modules (source-module-closure
|
||
'((gnu build activation)))
|
||
#~(begin
|
||
(use-modules (gnu build activation))
|
||
|
||
;; Make sure ~/.ssh is #o700.
|
||
(let* ((home (getenv "HOME"))
|
||
(dot-ssh (string-append home "/.ssh")))
|
||
(mkdir-p/perms dot-ssh (getpw (getuid)) #o700)))))
|
||
|
||
(define home-openssh-service-type
|
||
(service-type
|
||
(name 'home-openssh)
|
||
(extensions
|
||
(list (service-extension home-files-service-type
|
||
openssh-configuration-files)
|
||
(service-extension home-activation-service-type
|
||
(const openssh-activation))))
|
||
(description "Configure the OpenSSH @acronym{SSH, secure shell} client
|
||
by providing a @file{~/.ssh/config} file, which is honored by the OpenSSH
|
||
client,@command{ssh}, and by other tools such as @command{guix deploy}.")
|
||
(default-value (home-openssh-configuration))))
|
||
|
||
|
||
;;;
|
||
;;; Ssh-agent.
|
||
;;;
|
||
(define-record-type* <home-ssh-agent-configuration>
|
||
home-ssh-agent-configuration make-home-ssh-agent-configuration
|
||
home-ssh-agent-configuration?
|
||
(openssh home-ssh-agent-openssh ;file-like
|
||
(default openssh))
|
||
(socket-directory home-ssh-agent-socket-directory ;string
|
||
(default #~(string-append %user-runtime-dir "/ssh-agent")))
|
||
(extra-options home-ssh-agent-extra-options ;list of string
|
||
(default '())))
|
||
|
||
(define (home-ssh-agent-services config)
|
||
"Return a <shepherd-service> for an ssh-agent with CONFIG."
|
||
(match-record config <home-ssh-agent-configuration>
|
||
(openssh socket-directory extra-options)
|
||
(let* ((ssh-agent (file-append openssh "/bin/ssh-agent"))
|
||
(socket-file #~(string-append #$socket-directory "/socket"))
|
||
(command #~`(#$ssh-agent
|
||
"-D" "-a" ,#$socket-file
|
||
#$@extra-options))
|
||
(log-file #~(string-append %user-log-dir "/ssh-agent.log")))
|
||
(list (shepherd-service
|
||
(documentation "Run the ssh-agent.")
|
||
(provision '(ssh-agent))
|
||
(modules '((shepherd support))) ;for '%user-runtime-dir', etc.
|
||
(start #~(lambda _
|
||
(unless (file-exists? #$socket-directory)
|
||
(mkdir-p #$socket-directory)
|
||
(chmod #$socket-directory #o700))
|
||
(fork+exec-command #$command #:log-file #$log-file)))
|
||
(stop #~(make-kill-destructor)))))))
|
||
|
||
(define (home-ssh-agent-environment-variables config)
|
||
'(("SSH_AUTH_SOCK"
|
||
. "${SSH_AUTH_SOCK-${XDG_RUNTIME_DIR-$HOME/.cache}/ssh-agent/socket}")))
|
||
|
||
(define home-ssh-agent-service-type
|
||
(service-type
|
||
(name 'home-ssh-agent)
|
||
(default-value (home-ssh-agent-configuration))
|
||
(extensions
|
||
(list (service-extension home-shepherd-service-type
|
||
home-ssh-agent-services)
|
||
(service-extension home-environment-variables-service-type
|
||
home-ssh-agent-environment-variables)))
|
||
(description
|
||
"Install and configure @command{ssh-agent} as a Shepherd service.")))
|