a295a1ca29
Previously we could occasionally try to connect before the server is actually listening, both for OpenSSH and Dropbear. * gnu/tests/ssh.scm (run-ssh-test)["wait for port 22"]: New test.
245 lines
10 KiB
Scheme
245 lines
10 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2017, 2018 Clément Lassieur <clement@lassieur.org>
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;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu tests ssh)
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#:use-module (gnu tests)
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#:use-module (gnu system)
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#:use-module (gnu system vm)
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#:use-module (gnu services)
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#:use-module (gnu services ssh)
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#:use-module (gnu services networking)
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#:use-module (gnu packages ssh)
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#:use-module (guix gexp)
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#:use-module (guix store)
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#:export (%test-openssh
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%test-dropbear))
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(define* (run-ssh-test name ssh-service pid-file
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#:key (sftp? #f) (test-getlogin? #t))
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"Run a test of an OS running SSH-SERVICE, which writes its PID to PID-FILE.
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SSH-SERVICE must be configured to listen on port 22 and to allow for root and
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empty-password logins.
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When SFTP? is true, run an SFTP server test."
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(define os
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(marionette-operating-system
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(simple-operating-system (service dhcp-client-service-type) ssh-service)
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#:imported-modules '((gnu services herd)
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(guix combinators))))
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(define vm
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(virtual-machine
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(operating-system os)
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(port-forwardings '((2222 . 22)))))
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(define test
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(with-imported-modules '((gnu build marionette))
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(with-extensions (list guile-ssh)
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#~(begin
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(use-modules (gnu build marionette)
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(srfi srfi-26)
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(srfi srfi-64)
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(ice-9 textual-ports)
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(ice-9 match)
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(ssh session)
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(ssh auth)
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(ssh channel)
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(ssh popen)
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(ssh sftp))
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(define marionette
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;; Enable TCP forwarding of the guest's port 22.
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(make-marionette (list #$vm)))
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(define (make-session-for-test)
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"Make a session with predefined parameters for a test."
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(make-session #:user "root"
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#:port 2222
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#:host "localhost"
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#:log-verbosity 'protocol))
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(define (call-with-connected-session proc)
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"Call the one-argument procedure PROC with a freshly created and
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connected SSH session object, return the result of the procedure call. The
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session is disconnected when the PROC is finished."
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(let ((session (make-session-for-test)))
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(dynamic-wind
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(lambda ()
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(let ((result (connect! session)))
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(unless (equal? result 'ok)
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(error "Could not connect to a server"
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session result))))
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(lambda () (proc session))
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(lambda () (disconnect! session)))))
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(define (call-with-connected-session/auth proc)
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"Make an authenticated session. We should be able to connect as
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root with an empty password."
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(call-with-connected-session
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(lambda (session)
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;; Try the simple authentication methods. Dropbear requires
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;; 'none' when there are no passwords, whereas OpenSSH accepts
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;; 'password' with an empty password.
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(let loop ((methods (list (cut userauth-password! <> "")
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(cut userauth-none! <>))))
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(match methods
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(()
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(error "all the authentication methods failed"))
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((auth rest ...)
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(match (pk 'auth (auth session))
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('success
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(proc session))
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('denied
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(loop rest)))))))))
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(mkdir #$output)
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(chdir #$output)
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(test-begin "ssh-daemon")
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;; Wait for sshd to be up and running.
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(test-assert "service running"
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(marionette-eval
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'(begin
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(use-modules (gnu services herd))
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(start-service 'ssh-daemon))
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marionette))
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;; Check sshd's PID file.
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(test-equal "sshd PID"
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(wait-for-file #$pid-file marionette)
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(marionette-eval
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'(begin
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(use-modules (gnu services herd)
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(srfi srfi-1))
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(live-service-running
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(find (lambda (live)
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(memq 'ssh-daemon
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(live-service-provision live)))
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(current-services))))
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marionette))
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(test-assert "wait for port 22"
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(wait-for-tcp-port 22 marionette))
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;; Connect to the guest over SSH. Make sure we can run a shell
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;; command there.
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(test-equal "shell command"
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'hello
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(call-with-connected-session/auth
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(lambda (session)
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;; FIXME: 'get-server-public-key' segfaults.
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;; (get-server-public-key session)
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(let ((channel (make-channel session)))
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(channel-open-session channel)
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(channel-request-exec channel "echo hello > /root/witness")
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(and (zero? (channel-get-exit-status channel))
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(wait-for-file "/root/witness" marionette))))))
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;; Check whether the 'getlogin' procedure returns the right thing.
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(unless #$test-getlogin?
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(test-skip 1))
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(test-equal "getlogin"
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'(0 "root")
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(call-with-connected-session/auth
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(lambda (session)
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(let* ((pipe (open-remote-input-pipe
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session
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"guile -c '(display (getlogin))'"))
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(output (get-string-all pipe))
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(status (channel-get-exit-status pipe)))
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(list status output)))))
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;; Connect to the guest over SFTP. Make sure we can write and
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;; read a file there.
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(unless #$sftp?
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(test-skip 1))
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(test-equal "SFTP file writing and reading"
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'hello
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(call-with-connected-session/auth
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(lambda (session)
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(let ((sftp-session (make-sftp-session session))
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(witness "/root/sftp-witness"))
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(call-with-remote-output-file sftp-session witness
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(cut display "hello" <>))
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(call-with-remote-input-file sftp-session witness
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read)))))
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;; Connect to the guest over SSH. Make sure we can run commands
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;; from the system profile.
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(test-equal "run executables from system profile"
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#t
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(call-with-connected-session/auth
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(lambda (session)
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(let ((channel (make-channel session)))
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(channel-open-session channel)
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(channel-request-exec
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channel
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(string-append
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"mkdir -p /root/.guix-profile/bin && "
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"touch /root/.guix-profile/bin/path-witness && "
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"chmod 755 /root/.guix-profile/bin/path-witness"))
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(zero? (channel-get-exit-status channel))))))
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;; Connect to the guest over SSH. Make sure we can run commands
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;; from the user profile.
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(test-equal "run executable from user profile"
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#t
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(call-with-connected-session/auth
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(lambda (session)
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(let ((channel (make-channel session)))
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(channel-open-session channel)
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(channel-request-exec channel "path-witness")
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(zero? (channel-get-exit-status channel))))))
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(test-end)
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(exit (= (test-runner-fail-count (test-runner-current)) 0))))))
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(gexp->derivation name test))
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(define %test-openssh
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(system-test
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(name "openssh")
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(description "Connect to a running OpenSSH daemon.")
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(value (run-ssh-test name
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;; Allow root logins with an empty password to
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;; simplify testing.
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(service openssh-service-type
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(openssh-configuration
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(permit-root-login #t)
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(allow-empty-passwords? #t)))
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"/var/run/sshd.pid"
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#:sftp? #t))))
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(define %test-dropbear
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(system-test
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(name "dropbear")
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(description "Connect to a running Dropbear SSH daemon.")
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(value (run-ssh-test name
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(service dropbear-service-type
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(dropbear-configuration
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(root-login? #t)
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(allow-empty-passwords? #t)))
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"/var/run/dropbear.pid"
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;; XXX: Our Dropbear is not built with PAM support.
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;; Even when it is, it seems to ignore the PAM
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;; 'session' requirements.
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#:test-getlogin? #f))))
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