Commit | Line | Data |
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f33e2d78 | 1 | ;;; GNU Guix --- Functional package management for GNU |
3d3c5650 | 2 | ;;; Copyright © 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org> |
71b0601a | 3 | ;;; Copyright © 2016 David Craven <david@craven.ch> |
86d8f6d3 | 4 | ;;; Copyright © 2016 Julien Lepiller <julien@lepiller.eu> |
e57bd0be | 5 | ;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org> |
f33e2d78 LC |
6 | ;;; |
7 | ;;; This file is part of GNU Guix. | |
8 | ;;; | |
9 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
10 | ;;; under the terms of the GNU General Public License as published by | |
11 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
12 | ;;; your option) any later version. | |
13 | ;;; | |
14 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
15 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;;; GNU General Public License for more details. | |
18 | ;;; | |
19 | ;;; You should have received a copy of the GNU General Public License | |
20 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
21 | ||
22 | (define-module (gnu services ssh) | |
71b0601a | 23 | #:use-module (gnu packages ssh) |
86d8f6d3 | 24 | #:use-module (gnu packages admin) |
f33e2d78 | 25 | #:use-module (gnu services) |
0190c1c0 | 26 | #:use-module (gnu services shepherd) |
6e828634 | 27 | #:use-module (gnu system pam) |
86d8f6d3 | 28 | #:use-module (gnu system shadow) |
71b0601a DC |
29 | #:use-module (guix gexp) |
30 | #:use-module (guix records) | |
4892eb7c | 31 | #:use-module (guix modules) |
1398a438 | 32 | #:use-module (srfi srfi-1) |
fde40c98 | 33 | #:use-module (srfi srfi-26) |
86d8f6d3 | 34 | #:use-module (ice-9 match) |
24e96431 TČ |
35 | #:export (lsh-configuration |
36 | lsh-configuration? | |
37 | lsh-service | |
38 | lsh-service-type | |
71b0601a | 39 | |
86d8f6d3 JL |
40 | openssh-configuration |
41 | openssh-configuration? | |
42 | openssh-service-type | |
86d8f6d3 | 43 | |
71b0601a DC |
44 | dropbear-configuration |
45 | dropbear-configuration? | |
46 | dropbear-service-type | |
47 | dropbear-service)) | |
f33e2d78 LC |
48 | |
49 | ;;; Commentary: | |
50 | ;;; | |
51 | ;;; This module implements secure shell (SSH) services. | |
52 | ;;; | |
53 | ;;; Code: | |
54 | ||
0adfe95a LC |
55 | (define-record-type* <lsh-configuration> |
56 | lsh-configuration make-lsh-configuration | |
57 | lsh-configuration? | |
58 | (lsh lsh-configuration-lsh | |
59 | (default lsh)) | |
60 | (daemonic? lsh-configuration-daemonic?) | |
61 | (host-key lsh-configuration-host-key) | |
62 | (interfaces lsh-configuration-interfaces) | |
63 | (port-number lsh-configuration-port-number) | |
64 | (allow-empty-passwords? lsh-configuration-allow-empty-passwords?) | |
65 | (root-login? lsh-configuration-root-login?) | |
66 | (syslog-output? lsh-configuration-syslog-output?) | |
67 | (pid-file? lsh-configuration-pid-file?) | |
68 | (pid-file lsh-configuration-pid-file) | |
69 | (x11-forwarding? lsh-configuration-x11-forwarding?) | |
70 | (tcp/ip-forwarding? lsh-configuration-tcp/ip-forwarding?) | |
71 | (password-authentication? lsh-configuration-password-authentication?) | |
72 | (public-key-authentication? lsh-configuration-public-key-authentication?) | |
73 | (initialize? lsh-configuration-initialize?)) | |
74 | ||
f33e2d78 LC |
75 | (define %yarrow-seed |
76 | "/var/spool/lsh/yarrow-seed-file") | |
77 | ||
0adfe95a LC |
78 | (define (lsh-initialization lsh host-key) |
79 | "Return the gexp to initialize the LSH service for HOST-KEY." | |
f33e2d78 LC |
80 | #~(begin |
81 | (unless (file-exists? #$%yarrow-seed) | |
82 | (system* (string-append #$lsh "/bin/lsh-make-seed") | |
83 | "--sloppy" "-o" #$%yarrow-seed)) | |
84 | ||
85 | (unless (file-exists? #$host-key) | |
86 | (mkdir-p (dirname #$host-key)) | |
87 | (format #t "creating SSH host key '~a'...~%" #$host-key) | |
88 | ||
89 | ;; FIXME: We're just doing a simple pipeline, but 'system' cannot be | |
90 | ;; used yet because /bin/sh might be dangling; factorize this somehow. | |
91 | (let* ((in+out (pipe)) | |
92 | (keygen (primitive-fork))) | |
93 | (case keygen | |
94 | ((0) | |
95 | (close-port (car in+out)) | |
96 | (close-fdes 1) | |
97 | (dup2 (fileno (cdr in+out)) 1) | |
98 | (execl (string-append #$lsh "/bin/lsh-keygen") | |
99 | "lsh-keygen" "--server")) | |
100 | (else | |
101 | (let ((write-key (primitive-fork))) | |
102 | (case write-key | |
103 | ((0) | |
104 | (close-port (cdr in+out)) | |
105 | (close-fdes 0) | |
106 | (dup2 (fileno (car in+out)) 0) | |
107 | (execl (string-append #$lsh "/bin/lsh-writekey") | |
108 | "lsh-writekey" "--server" "-o" #$host-key)) | |
109 | (else | |
110 | (close-port (car in+out)) | |
111 | (close-port (cdr in+out)) | |
112 | (waitpid keygen) | |
113 | (waitpid write-key)))))))))) | |
114 | ||
0adfe95a LC |
115 | (define (lsh-activation config) |
116 | "Return the activation gexp for CONFIG." | |
117 | #~(begin | |
118 | (use-modules (guix build utils)) | |
119 | (mkdir-p "/var/spool/lsh") | |
120 | #$(if (lsh-configuration-initialize? config) | |
121 | (lsh-initialization (lsh-configuration-lsh config) | |
122 | (lsh-configuration-host-key config)) | |
123 | #t))) | |
124 | ||
d4053c71 AK |
125 | (define (lsh-shepherd-service config) |
126 | "Return a <shepherd-service> for lsh with CONFIG." | |
0adfe95a LC |
127 | (define lsh (lsh-configuration-lsh config)) |
128 | (define pid-file (lsh-configuration-pid-file config)) | |
129 | (define pid-file? (lsh-configuration-pid-file? config)) | |
130 | (define daemonic? (lsh-configuration-daemonic? config)) | |
131 | (define interfaces (lsh-configuration-interfaces config)) | |
132 | ||
133 | (define lsh-command | |
134 | (append | |
9e41130b | 135 | (cons (file-append lsh "/sbin/lshd") |
0adfe95a LC |
136 | (if daemonic? |
137 | (let ((syslog (if (lsh-configuration-syslog-output? config) | |
138 | '() | |
139 | (list "--no-syslog")))) | |
140 | (cons "--daemonic" | |
141 | (if pid-file? | |
142 | (cons #~(string-append "--pid-file=" #$pid-file) | |
143 | syslog) | |
144 | (cons "--no-pid-file" syslog)))) | |
145 | (if pid-file? | |
146 | (list #~(string-append "--pid-file=" #$pid-file)) | |
147 | '()))) | |
148 | (cons* #~(string-append "--host-key=" | |
149 | #$(lsh-configuration-host-key config)) | |
150 | #~(string-append "--password-helper=" #$lsh "/sbin/lsh-pam-checkpw") | |
151 | #~(string-append "--subsystems=sftp=" #$lsh "/sbin/sftp-server") | |
152 | "-p" (number->string (lsh-configuration-port-number config)) | |
153 | (if (lsh-configuration-password-authentication? config) | |
154 | "--password" "--no-password") | |
155 | (if (lsh-configuration-public-key-authentication? config) | |
156 | "--publickey" "--no-publickey") | |
157 | (if (lsh-configuration-root-login? config) | |
158 | "--root-login" "--no-root-login") | |
159 | (if (lsh-configuration-x11-forwarding? config) | |
160 | "--x11-forward" "--no-x11-forward") | |
161 | (if (lsh-configuration-tcp/ip-forwarding? config) | |
162 | "--tcpip-forward" "--no-tcpip-forward") | |
163 | (if (null? interfaces) | |
164 | '() | |
fde40c98 LC |
165 | (map (cut string-append "--interface=" <>) |
166 | interfaces))))) | |
0adfe95a LC |
167 | |
168 | (define requires | |
169 | (if (and daemonic? (lsh-configuration-syslog-output? config)) | |
170 | '(networking syslogd) | |
171 | '(networking))) | |
172 | ||
d4053c71 | 173 | (list (shepherd-service |
0adfe95a LC |
174 | (documentation "GNU lsh SSH server") |
175 | (provision '(ssh-daemon)) | |
176 | (requirement requires) | |
177 | (start #~(make-forkexec-constructor (list #$@lsh-command))) | |
178 | (stop #~(make-kill-destructor))))) | |
179 | ||
180 | (define (lsh-pam-services config) | |
181 | "Return a list of <pam-services> for lshd with CONFIG." | |
182 | (list (unix-pam-service | |
183 | "lshd" | |
184 | #:allow-empty-passwords? | |
185 | (lsh-configuration-allow-empty-passwords? config)))) | |
186 | ||
187 | (define lsh-service-type | |
188 | (service-type (name 'lsh) | |
189 | (extensions | |
d4053c71 AK |
190 | (list (service-extension shepherd-root-service-type |
191 | lsh-shepherd-service) | |
0adfe95a LC |
192 | (service-extension pam-root-service-type |
193 | lsh-pam-services) | |
194 | (service-extension activation-service-type | |
195 | lsh-activation))))) | |
196 | ||
f33e2d78 LC |
197 | (define* (lsh-service #:key |
198 | (lsh lsh) | |
5833bf33 | 199 | (daemonic? #t) |
f33e2d78 LC |
200 | (host-key "/etc/lsh/host-key") |
201 | (interfaces '()) | |
202 | (port-number 22) | |
203 | (allow-empty-passwords? #f) | |
204 | (root-login? #f) | |
205 | (syslog-output? #t) | |
5833bf33 DP |
206 | (pid-file? #f) |
207 | (pid-file "/var/run/lshd.pid") | |
f33e2d78 LC |
208 | (x11-forwarding? #t) |
209 | (tcp/ip-forwarding? #t) | |
210 | (password-authentication? #t) | |
211 | (public-key-authentication? #t) | |
21cc905a | 212 | (initialize? #t)) |
f33e2d78 LC |
213 | "Run the @command{lshd} program from @var{lsh} to listen on port @var{port-number}. |
214 | @var{host-key} must designate a file containing the host key, and readable | |
215 | only by root. | |
216 | ||
5833bf33 DP |
217 | When @var{daemonic?} is true, @command{lshd} will detach from the |
218 | controlling terminal and log its output to syslogd, unless one sets | |
219 | @var{syslog-output?} to false. Obviously, it also makes lsh-service | |
220 | depend on existence of syslogd service. When @var{pid-file?} is true, | |
221 | @command{lshd} writes its PID to the file called @var{pid-file}. | |
222 | ||
f33e2d78 LC |
223 | When @var{initialize?} is true, automatically create the seed and host key |
224 | upon service activation if they do not exist yet. This may take long and | |
225 | require interaction. | |
226 | ||
20dd519c LC |
227 | When @var{initialize?} is false, it is up to the user to initialize the |
228 | randomness generator (@pxref{lsh-make-seed,,, lsh, LSH Manual}), and to create | |
229 | a key pair with the private key stored in file @var{host-key} (@pxref{lshd | |
230 | basics,,, lsh, LSH Manual}). | |
231 | ||
f33e2d78 LC |
232 | When @var{interfaces} is empty, lshd listens for connections on all the |
233 | network interfaces; otherwise, @var{interfaces} must be a list of host names | |
234 | or addresses. | |
235 | ||
20dd519c LC |
236 | @var{allow-empty-passwords?} specifies whether to accept log-ins with empty |
237 | passwords, and @var{root-login?} specifies whether to accept log-ins as | |
f33e2d78 LC |
238 | root. |
239 | ||
240 | The other options should be self-descriptive." | |
0adfe95a LC |
241 | (service lsh-service-type |
242 | (lsh-configuration (lsh lsh) (daemonic? daemonic?) | |
243 | (host-key host-key) (interfaces interfaces) | |
244 | (port-number port-number) | |
245 | (allow-empty-passwords? allow-empty-passwords?) | |
246 | (root-login? root-login?) | |
247 | (syslog-output? syslog-output?) | |
248 | (pid-file? pid-file?) (pid-file pid-file) | |
249 | (x11-forwarding? x11-forwarding?) | |
250 | (tcp/ip-forwarding? tcp/ip-forwarding?) | |
251 | (password-authentication? | |
252 | password-authentication?) | |
253 | (public-key-authentication? | |
254 | public-key-authentication?) | |
255 | (initialize? initialize?)))) | |
f33e2d78 | 256 | |
71b0601a | 257 | \f |
86d8f6d3 JL |
258 | ;;; |
259 | ;;; OpenSSH. | |
260 | ;;; | |
261 | ||
262 | (define-record-type* <openssh-configuration> | |
263 | openssh-configuration make-openssh-configuration | |
264 | openssh-configuration? | |
4ca3e9b7 CL |
265 | ;; <package> |
266 | (openssh openssh-configuration-openssh | |
23f22ba8 | 267 | (default openssh)) |
4ca3e9b7 | 268 | ;; string |
d8f31281 LC |
269 | (pid-file openssh-configuration-pid-file |
270 | (default "/var/run/sshd.pid")) | |
4ca3e9b7 CL |
271 | ;; integer |
272 | (port-number openssh-configuration-port-number | |
d8f31281 | 273 | (default 22)) |
4ca3e9b7 CL |
274 | ;; Boolean | 'without-password |
275 | (permit-root-login openssh-configuration-permit-root-login | |
d8f31281 | 276 | (default #f)) |
4ca3e9b7 CL |
277 | ;; Boolean |
278 | (allow-empty-passwords? openssh-configuration-allow-empty-passwords? | |
d8f31281 | 279 | (default #f)) |
4ca3e9b7 CL |
280 | ;; Boolean |
281 | (password-authentication? openssh-configuration-password-authentication? | |
d8f31281 | 282 | (default #t)) |
4ca3e9b7 | 283 | ;; Boolean |
d8f31281 | 284 | (public-key-authentication? openssh-configuration-public-key-authentication? |
4ca3e9b7 CL |
285 | (default #t)) |
286 | ;; Boolean | |
287 | (x11-forwarding? openssh-configuration-x11-forwarding? | |
d8f31281 | 288 | (default #f)) |
4ca3e9b7 | 289 | ;; Boolean |
563c5d42 | 290 | (challenge-response-authentication? openssh-challenge-response-authentication? |
4ca3e9b7 CL |
291 | (default #f)) |
292 | ;; Boolean | |
563c5d42 | 293 | (use-pam? openssh-configuration-use-pam? |
4ca3e9b7 CL |
294 | (default #t)) |
295 | ;; Boolean | |
f895dce4 | 296 | (print-last-log? openssh-configuration-print-last-log? |
12723370 CL |
297 | (default #t)) |
298 | ;; list of two-element lists | |
299 | (subsystems openssh-configuration-subsystems | |
4892eb7c LC |
300 | (default '(("sftp" "internal-sftp")))) |
301 | ||
302 | ;; list of user-name/file-like tuples | |
303 | (authorized-keys openssh-authorized-keys | |
304 | (default '()))) | |
86d8f6d3 JL |
305 | |
306 | (define %openssh-accounts | |
307 | (list (user-group (name "sshd") (system? #t)) | |
308 | (user-account | |
309 | (name "sshd") | |
310 | (group "sshd") | |
311 | (system? #t) | |
312 | (comment "sshd privilege separation user") | |
313 | (home-directory "/var/run/sshd") | |
314 | (shell #~(string-append #$shadow "/sbin/nologin"))))) | |
315 | ||
316 | (define (openssh-activation config) | |
317 | "Return the activation GEXP for CONFIG." | |
4892eb7c LC |
318 | (with-imported-modules '((guix build utils)) |
319 | #~(begin | |
320 | (use-modules (guix build utils)) | |
321 | ||
322 | (define (touch file-name) | |
323 | (call-with-output-file file-name (const #t))) | |
324 | ||
325 | ;; Make sure /etc/ssh can be read by the 'sshd' user. | |
326 | (mkdir-p "/etc/ssh") | |
327 | (chmod "/etc/ssh" #o755) | |
328 | (mkdir-p (dirname #$(openssh-configuration-pid-file config))) | |
329 | ||
330 | ;; 'sshd' complains if the authorized-key directory and its parents | |
331 | ;; are group-writable, which rules out /gnu/store. Thus we copy the | |
332 | ;; authorized-key directory to /etc. | |
333 | (catch 'system-error | |
334 | (lambda () | |
335 | (delete-file-recursively "/etc/authorized_keys.d")) | |
336 | (lambda args | |
337 | (unless (= ENOENT (system-error-errno args)) | |
338 | (apply throw args)))) | |
339 | (copy-recursively #$(authorized-key-directory | |
340 | (openssh-authorized-keys config)) | |
341 | "/etc/ssh/authorized_keys.d") | |
342 | ||
343 | (chmod "/etc/ssh/authorized_keys.d" #o555) | |
344 | ||
345 | (let ((lastlog "/var/log/lastlog")) | |
346 | (when #$(openssh-configuration-print-last-log? config) | |
347 | (unless (file-exists? lastlog) | |
348 | (touch lastlog)))) | |
349 | ||
350 | ;; Generate missing host keys. | |
351 | (system* (string-append #$(openssh-configuration-openssh config) | |
352 | "/bin/ssh-keygen") "-A")))) | |
353 | ||
354 | (define (authorized-key-directory keys) | |
355 | "Return a directory containing the authorized keys specified in KEYS, a list | |
356 | of user-name/file-like tuples." | |
357 | (define build | |
358 | (with-imported-modules (source-module-closure '((guix build utils))) | |
359 | #~(begin | |
360 | (use-modules (ice-9 match) (srfi srfi-26) | |
361 | (guix build utils)) | |
362 | ||
363 | (mkdir #$output) | |
364 | (for-each (match-lambda | |
365 | ((user keys ...) | |
366 | (let ((file (string-append #$output "/" user))) | |
367 | (call-with-output-file file | |
368 | (lambda (port) | |
369 | (for-each (lambda (key) | |
370 | (call-with-input-file key | |
371 | (cut dump-port <> port))) | |
372 | keys)))))) | |
373 | '#$keys)))) | |
374 | ||
375 | (computed-file "openssh-authorized-keys" build)) | |
86d8f6d3 JL |
376 | |
377 | (define (openssh-config-file config) | |
378 | "Return the sshd configuration file corresponding to CONFIG." | |
379 | (computed-file | |
380 | "sshd_config" | |
12723370 CL |
381 | #~(begin |
382 | (use-modules (ice-9 match)) | |
383 | (call-with-output-file #$output | |
384 | (lambda (port) | |
385 | (display "# Generated by 'openssh-service'.\n" port) | |
386 | (format port "Port ~a\n" | |
387 | #$(number->string | |
388 | (openssh-configuration-port-number config))) | |
389 | (format port "PermitRootLogin ~a\n" | |
390 | #$(match (openssh-configuration-permit-root-login config) | |
391 | (#t "yes") | |
392 | (#f "no") | |
393 | ('without-password "without-password"))) | |
394 | (format port "PermitEmptyPasswords ~a\n" | |
395 | #$(if (openssh-configuration-allow-empty-passwords? config) | |
396 | "yes" "no")) | |
397 | (format port "PasswordAuthentication ~a\n" | |
398 | #$(if (openssh-configuration-password-authentication? config) | |
399 | "yes" "no")) | |
400 | (format port "PubkeyAuthentication ~a\n" | |
401 | #$(if (openssh-configuration-public-key-authentication? | |
402 | config) | |
403 | "yes" "no")) | |
404 | (format port "X11Forwarding ~a\n" | |
405 | #$(if (openssh-configuration-x11-forwarding? config) | |
406 | "yes" "no")) | |
407 | (format port "PidFile ~a\n" | |
408 | #$(openssh-configuration-pid-file config)) | |
409 | (format port "ChallengeResponseAuthentication ~a\n" | |
410 | #$(if (openssh-challenge-response-authentication? config) | |
411 | "yes" "no")) | |
412 | (format port "UsePAM ~a\n" | |
413 | #$(if (openssh-configuration-use-pam? config) | |
414 | "yes" "no")) | |
415 | (format port "PrintLastLog ~a\n" | |
416 | #$(if (openssh-configuration-print-last-log? config) | |
417 | "yes" "no")) | |
4892eb7c LC |
418 | |
419 | ;; Add '/etc/authorized_keys.d/%u', which we populate. | |
420 | (format port "AuthorizedKeysFile \ | |
421 | .ssh/authorized_keys .ssh/authorized_keys2 /etc/ssh/authorized_keys.d/%u\n") | |
422 | ||
12723370 CL |
423 | (for-each |
424 | (match-lambda | |
425 | ((name command) (format port "Subsystem\t~a\t~a\n" name command))) | |
426 | '#$(openssh-configuration-subsystems config)) | |
427 | #t))))) | |
86d8f6d3 JL |
428 | |
429 | (define (openssh-shepherd-service config) | |
430 | "Return a <shepherd-service> for openssh with CONFIG." | |
431 | ||
432 | (define pid-file | |
433 | (openssh-configuration-pid-file config)) | |
434 | ||
435 | (define openssh-command | |
23f22ba8 | 436 | #~(list (string-append #$(openssh-configuration-openssh config) "/sbin/sshd") |
86d8f6d3 JL |
437 | "-D" "-f" #$(openssh-config-file config))) |
438 | ||
439 | (list (shepherd-service | |
440 | (documentation "OpenSSH server.") | |
07bf68ed | 441 | (requirement '(syslogd)) |
86d8f6d3 JL |
442 | (provision '(ssh-daemon)) |
443 | (start #~(make-forkexec-constructor #$openssh-command | |
444 | #:pid-file #$pid-file)) | |
445 | (stop #~(make-kill-destructor))))) | |
446 | ||
563c5d42 CL |
447 | (define (openssh-pam-services config) |
448 | "Return a list of <pam-services> for sshd with CONFIG." | |
449 | (list (unix-pam-service | |
450 | "sshd" | |
451 | #:allow-empty-passwords? | |
452 | (openssh-configuration-allow-empty-passwords? config)))) | |
453 | ||
1398a438 LC |
454 | (define (extend-openssh-authorized-keys config keys) |
455 | "Extend CONFIG with the extra authorized keys listed in KEYS." | |
456 | (openssh-configuration | |
457 | (inherit config) | |
458 | (authorized-keys | |
459 | (append (openssh-authorized-keys config) keys)))) | |
460 | ||
86d8f6d3 JL |
461 | (define openssh-service-type |
462 | (service-type (name 'openssh) | |
463 | (extensions | |
464 | (list (service-extension shepherd-root-service-type | |
465 | openssh-shepherd-service) | |
563c5d42 CL |
466 | (service-extension pam-root-service-type |
467 | openssh-pam-services) | |
86d8f6d3 JL |
468 | (service-extension activation-service-type |
469 | openssh-activation) | |
470 | (service-extension account-service-type | |
3d3c5650 | 471 | (const %openssh-accounts)))) |
1398a438 LC |
472 | (compose concatenate) |
473 | (extend extend-openssh-authorized-keys) | |
3d3c5650 | 474 | (default-value (openssh-configuration)))) |
86d8f6d3 | 475 | |
86d8f6d3 | 476 | \f |
71b0601a DC |
477 | ;;; |
478 | ;;; Dropbear. | |
479 | ;;; | |
480 | ||
481 | (define-record-type* <dropbear-configuration> | |
482 | dropbear-configuration make-dropbear-configuration | |
483 | dropbear-configuration? | |
484 | (dropbear dropbear-configuration-dropbear | |
485 | (default dropbear)) | |
486 | (port-number dropbear-configuration-port-number | |
487 | (default 22)) | |
488 | (syslog-output? dropbear-configuration-syslog-output? | |
489 | (default #t)) | |
490 | (pid-file dropbear-configuration-pid-file | |
491 | (default "/var/run/dropbear.pid")) | |
492 | (root-login? dropbear-configuration-root-login? | |
493 | (default #f)) | |
494 | (allow-empty-passwords? dropbear-configuration-allow-empty-passwords? | |
495 | (default #f)) | |
496 | (password-authentication? dropbear-configuration-password-authentication? | |
497 | (default #t))) | |
498 | ||
499 | (define (dropbear-activation config) | |
500 | "Return the activation gexp for CONFIG." | |
501 | #~(begin | |
e57bd0be | 502 | (use-modules (guix build utils)) |
71b0601a DC |
503 | (mkdir-p "/etc/dropbear"))) |
504 | ||
505 | (define (dropbear-shepherd-service config) | |
506 | "Return a <shepherd-service> for dropbear with CONFIG." | |
507 | (define dropbear | |
508 | (dropbear-configuration-dropbear config)) | |
509 | ||
510 | (define pid-file | |
511 | (dropbear-configuration-pid-file config)) | |
512 | ||
513 | (define dropbear-command | |
514 | #~(list (string-append #$dropbear "/sbin/dropbear") | |
515 | ||
516 | ;; '-R' allows host keys to be automatically generated upon first | |
517 | ;; connection, at a time when /dev/urandom is more likely securely | |
518 | ;; seeded. | |
519 | "-F" "-R" | |
520 | ||
521 | "-p" #$(number->string (dropbear-configuration-port-number config)) | |
522 | "-P" #$pid-file | |
523 | #$@(if (dropbear-configuration-syslog-output? config) '() '("-E")) | |
524 | #$@(if (dropbear-configuration-root-login? config) '() '("-w")) | |
525 | #$@(if (dropbear-configuration-password-authentication? config) | |
526 | '() | |
527 | '("-s" "-g")) | |
528 | #$@(if (dropbear-configuration-allow-empty-passwords? config) | |
529 | '("-B") | |
530 | '()))) | |
531 | ||
532 | (define requires | |
533 | (if (dropbear-configuration-syslog-output? config) | |
534 | '(networking syslogd) '(networking))) | |
535 | ||
536 | (list (shepherd-service | |
537 | (documentation "Dropbear SSH server.") | |
538 | (requirement requires) | |
539 | (provision '(ssh-daemon)) | |
540 | (start #~(make-forkexec-constructor #$dropbear-command | |
541 | #:pid-file #$pid-file)) | |
542 | (stop #~(make-kill-destructor))))) | |
543 | ||
544 | (define dropbear-service-type | |
545 | (service-type (name 'dropbear) | |
546 | (extensions | |
547 | (list (service-extension shepherd-root-service-type | |
548 | dropbear-shepherd-service) | |
549 | (service-extension activation-service-type | |
550 | dropbear-activation))))) | |
551 | ||
552 | (define* (dropbear-service #:optional (config (dropbear-configuration))) | |
553 | "Run the @uref{https://matt.ucc.asn.au/dropbear/dropbear.html,Dropbear SSH | |
554 | daemon} with the given @var{config}, a @code{<dropbear-configuration>} | |
555 | object." | |
556 | (service dropbear-service-type config)) | |
557 | ||
f33e2d78 | 558 | ;;; ssh.scm ends here |