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installer: Ask for user password and initialize /etc/shadow.

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Partly fixes <https://bugs.gnu.org/35399>.

* gnu/installer/user.scm (<user>)[password]: New field.
* gnu/installer/final.scm (%seed): New variable.
(integer->alphanumeric-char, random-string)
(create-user-database): New procedures.
(install-system): Call 'create-user-database'.
* gnu/installer/newt/final.scm (run-install-shell): Add #:users and pass
it to 'install-system'.
(run-final-page): Pass #:users to 'run-install-shell'.
* gnu/installer/newt/user.scm (run-user-add-page): Add password entry.
Pass its result as the 'password' field of <user>.
This commit is contained in:
Ludovic Courtès 2019-04-24 17:59:06 +02:00
parent 3cc033f2a8
commit 898677ed17
No known key found for this signature in database
GPG key ID: 090B11993D9AEBB5
4 changed files with 103 additions and 13 deletions
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84
gnu/installer/final.scm
View file

@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -20,19 +21,94 @@
#:use-module (gnu installer newt page)
#:use-module (gnu installer steps)
#:use-module (gnu installer utils)
#:use-module (gnu installer user)
#:use-module (gnu services herd)
#:use-module (guix build utils)
#:use-module (gnu build accounts)
#:use-module ((gnu system shadow) #:prefix sys:)
#:use-module (rnrs io ports)
#:export (install-system))
(define (install-system locale)
"Start COW-STORE service on target directory and launch guix install command
in a subshell. LOCALE must be the locale name under which that command will
run, or #f."
(define %seed
(seed->random-state
(logxor (getpid) (car (gettimeofday)))))
(define (integer->alphanumeric-char n)
"Map N, an integer in the [0..62] range, to an alphanumeric character."
(cond ((< n 10)
(integer->char (+ (char->integer #\0) n)))
((< n 36)
(integer->char (+ (char->integer #\A) (- n 10))))
((< n 62)
(integer->char (+ (char->integer #\a) (- n 36))))
(else
(error "integer out of bounds" n))))
(define (random-string len)
"Compute a random string of size LEN where each character is alphanumeric."
(let loop ((chars '())
(len len))
(if (zero? len)
(list->string chars)
(let ((n (random 62 %seed)))
(loop (cons (integer->alphanumeric-char n) chars)
(- len 1))))))
(define (create-user-database users root)
"Create /etc/passwd, /etc/shadow, and /etc/group under ROOT for the given
USERS."
(define etc
(string-append root "/etc"))
(define (salt)
;; "$6" gives us a SHA512 password hash; the random string must be taken
;; from the './0-9A-Za-z' alphabet (info "(libc) Passphrase Storage").
(string-append "$6$" (random-string 10)))
(define users*
(map (lambda (user)
(sys:user-account (name (user-name user))
(group "users")
(home-directory
(user-home-directory user))
(password (crypt (user-password user)
(salt)))
;; We need a string here, not a file-like, hence
;; this choice.
(shell
"/run/current-system/profile/bin/bash")))
users))
(define-values (group password shadow)
(user+group-databases users* sys:%base-groups
#:current-passwd '()
#:current-groups '()
#:current-shadow '()))
(mkdir-p etc)
(write-group group (string-append etc "/group"))
(write-passwd password (string-append etc "/passwd"))
(write-shadow shadow (string-append etc "/shadow")))
(define* (install-system locale #:key (users '()))
"Create /etc/shadow and /etc/passwd on the installation target for USERS.
Start COW-STORE service on target directory and launch guix install command in
a subshell. LOCALE must be the locale name under which that command will run,
or #f."
(let ((install-command
(format #f "guix system init ~a ~a"
(%installer-configuration-file)
(%installer-target-dir))))
(mkdir-p (%installer-target-dir))
;; We want to initialize user passwords but we don't want to store them in
;; the config file since the password hashes would end up world-readable
;; in the store. Thus, create /etc/shadow & co. here such that, on the
;; first boot, the activation snippet that creates accounts will reuse the
;; passwords that we've put in there.
(create-user-database users (%installer-target-dir))
(start-service 'cow-store (list (%installer-target-dir)))
(false-if-exception (run-shell-command install-command
#:locale locale))))

9
gnu/installer/newt/final.scm
View file

@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -65,10 +66,11 @@ press the button to reboot.")))
(G_ "The final system installation step failed. You can retry the \
last step, or restart the installer.")))
(define (run-install-shell locale)
(define* (run-install-shell locale
#:key (users '()))
(clear-screen)
(newt-suspend)
(let ((install-ok? (install-system locale)))
(let ((install-ok? (install-system locale #:users users)))
(newt-resume)
install-ok?))
@ -76,12 +78,13 @@ last step, or restart the installer.")))
(let* ((configuration (format-configuration prev-steps result))
(user-partitions (result-step result 'partition))
(locale (result-step result 'locale))
(users (result-step result 'user))
(install-ok?
(with-mounted-partitions
user-partitions
(configuration->file configuration)
(run-config-display-page)
(run-install-shell locale))))
(run-install-shell locale #:users users))))
(if install-ok?
(run-install-success-page)
(run-install-failed-page))))

21
gnu/installer/newt/user.scm
View file

@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -36,10 +37,14 @@
(make-label -1 -1 (pad-label (G_ "Name"))))
(label-home-directory
(make-label -1 -1 (pad-label (G_ "Home directory"))))
(label-password
(make-label -1 -1 (pad-label (G_ "Password"))))
(entry-width 30)
(entry-name (make-entry -1 -1 entry-width))
(entry-home-directory (make-entry -1 -1 entry-width))
(entry-grid (make-grid 2 2))
(entry-password (make-entry -1 -1 entry-width
#:flags FLAG-PASSWORD))
(entry-grid (make-grid 3 4))
(button-grid (make-grid 1 1))
(ok-button (make-button -1 -1 (G_ "OK")))
(grid (make-grid 1 2))
@ -52,6 +57,8 @@
(set-entry-grid-field 1 0 entry-name)
(set-entry-grid-field 0 1 label-home-directory)
(set-entry-grid-field 1 1 entry-home-directory)
(set-entry-grid-field 0 2 label-password)
(set-entry-grid-field 1 2 entry-password)
(set-grid-field button-grid 0 0 GRID-ELEMENT-COMPONENT ok-button)
@ -62,8 +69,8 @@
(string-append "/home/" (entry-value entry-name)))))
(add-components-to-form form
label-name label-home-directory
entry-name entry-home-directory
label-name label-home-directory label-password
entry-name entry-home-directory entry-password
ok-button)
(make-wrapped-grid-window (vertically-stacked-grid
@ -82,8 +89,9 @@
(when (eq? exit-reason 'exit-component)
(cond
((components=? argument ok-button)
(let ((name (entry-value entry-name))
(home-directory (entry-value entry-home-directory)))
(let ((name (entry-value entry-name))
(home-directory (entry-value entry-home-directory))
(password (entry-value entry-password)))
(if (or (string=? name "")
(string=? home-directory ""))
(begin
@ -91,7 +99,8 @@
(run-user-add-page))
(user
(name name)
(home-directory home-directory))))))))
(home-directory home-directory)
(password password))))))))
(lambda ()
(destroy-form-and-pop form)))))))

2
gnu/installer/user.scm
View file

@ -24,6 +24,7 @@
user-name
user-group
user-home-directory
user-password
users->configuration))
@ -33,6 +34,7 @@
(name user-name)
(group user-group
(default "users"))
(password user-password)
(home-directory user-home-directory))
(define (users->configuration users)