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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020, 2022 Mathieu Othacehe <othacehe@gnu.org>
;;;
;;; 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 image)
  #:use-module (guix platform)
  #:use-module (guix records)
  #:use-module (guix diagnostics)
  #:use-module (guix i18n)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:export (partition
            partition?
            partition-device
            partition-size
            partition-offset
            partition-file-system
            partition-file-system-options
            partition-label
            partition-uuid
            partition-flags
            partition-initializer

            image
            image?
            image-name
            image-format
            image-platform
            image-size
            image-operating-system
            image-partition-table-type
            image-partitions
            image-compression?
            image-volatile-root?
            image-shared-store?
            image-shared-network?
            image-substitutable?

            image-type
            image-type?
            image-type-name
            image-type-constructor

            os->image
            os+platform->image))


;;;
;;; Sanitizers.
;;;

;; Image and partition sizes can be either be a size in bytes or the 'guess
;; symbol denoting that the size should be estimated by Guix, according to the
;; image content.
(define-with-syntax-properties (validate-size (value properties))
  (unless (and value
               (or (eq? value 'guess) (integer? value)))
    (raise
       (make-compound-condition
        (condition
         (&error-location
          (location (source-properties->location properties))))
        (formatted-message
         (G_ "size (~a) can only be 'guess or a numeric expression ~%")
         value 'field))))
  value)


;;;
;;; Partition record.
;;;

;; The partition offset should be a bytes count as an integer.
(define-with-syntax-properties (validate-partition-offset (value properties))
  (unless (and value (integer? value))
    (raise
       (make-compound-condition
        (condition
         (&error-location
          (location (source-properties->location properties))))
        (formatted-message
         (G_ "the partition offset (~a) can only be a \
numeric expression ~%") value 'field))))
  value)

;; The supported partition flags.
(define-with-syntax-properties (validate-partition-flags (value properties))
  (let ((bad-flags (lset-difference eq? value '(boot esp))))
    (unless (and (list? value) (null? bad-flags))
      (raise
       (make-compound-condition
        (condition
         (&error-location
          (location (source-properties->location properties))))
        (formatted-message
         (G_ "unsupported partition flag(s): ~a ~%") bad-flags)))))
  value)

(define-record-type* <partition> partition make-partition
  partition?
  (size                 partition-size   ;size in bytes as integer or 'guess
                        (default 'guess)
                        (sanitize validate-size))
  (offset               partition-offset
                        (default 0)   ;offset in bytes as integer
                        (sanitize validate-partition-offset))
  (file-system          partition-file-system
                        (default "ext4"))  ;string
  (file-system-options  partition-file-system-options
                        (default '()))  ;list of strings
  (label                partition-label)  ;string
  (uuid                 partition-uuid
                        (default #false))  ;<uuid>
  (flags                partition-flags
                        (default '())  ;list of symbols
                        (sanitize validate-partition-flags))
  (initializer          partition-initializer
                        (default #false))) ;gexp | #false


;;;
;;; Image record.
;;;

(define-syntax-rule (define-set-sanitizer name field set)
  "Define NAME as a procedure or macro that raises an error if passed a value
that is not in SET, mentioning FIELD in the error message."
  (define-with-syntax-properties (name (value properties))
    (unless (memq value 'set)
      (raise
       (make-compound-condition
        (condition
         (&error-location
          (location (source-properties->location properties))))
        (formatted-message (G_ "~s: invalid '~a' value") value 'field))))
    value))

;; The supported image formats.
(define-set-sanitizer validate-image-format format
  (disk-image compressed-qcow2 docker iso9660 tarball wsl2))

;; The supported partition table types.
(define-set-sanitizer validate-partition-table-type partition-table-type
  (mbr gpt))

(define-record-type* <image>
  image make-image
  image?
  (name               image-name ;symbol
                      (default #false))
  (format             image-format                ;symbol
                      (sanitize validate-image-format))
  (platform           image-platform ;<platform>
                      (default #false))
  (size               image-size  ;size in bytes as integer
                      (default 'guess)
                      (sanitize validate-size))
  (operating-system   image-operating-system)  ;<operating-system>
  (partition-table-type image-partition-table-type ; 'mbr or 'gpt
                      (default 'mbr)
                      (sanitize validate-partition-table-type))
  (partitions         image-partitions ;list of <partition>
                      (default '()))
  (compression?       image-compression? ;boolean
                      (default #true))
  (volatile-root?     image-volatile-root? ;boolean
                      (default #true))
  (shared-store?      image-shared-store? ;boolean
                      (default #false))
  (shared-network?    image-shared-network? ;boolean
                      (default #false))
  (substitutable?     image-substitutable? ;boolean
                      (default #true)))


;;;
;;; Image type.
;;;

;; The role of this record is to provide a constructor that is able to turn an
;; <operating-system> record into an <image> record.  Some basic <image-type>
;; records are defined in the (gnu system image) module.  They are able to
;; turn an <operating-system> record into an EFI or an ISO 9660 bootable
;; image, a Docker image or even a QCOW2 image.
;;
;; Other <image-type> records are defined in the (gnu system images ...)
;; modules.  They are dedicated to specific machines such as Novena and Pine64
;; SoC boards that require specific images.
;;
;; All the available <image-type> records are collected by the 'image-modules'
;; procedure.  This allows the "guix system image" command to turn a given
;; <operating-system> record into an image, thanks to the specified
;; <image-type>.  In that case, the <image-type> look up is done using the
;; name field of the <image-type> record.

(define-record-type* <image-type>
  image-type make-image-type
  image-type?
  (name           image-type-name) ;symbol
  (constructor    image-type-constructor)) ;<operating-system> -> <image>


;;;
;;; Image creation.
;;;

(define* (os->image os #:key type)
  "Use the image constructor from TYPE, an <image-type> record to turn the
given OS, an <operating-system> record into an image and return it."
  (let ((constructor (image-type-constructor type)))
    (constructor os)))

(define* (os+platform->image os platform #:key type)
  "Use the image constructor from TYPE, an <image-type> record to turn the
given OS, an <operating-system> record into an image targeting PLATFORM, a
<platform> record and return it."
  (image
   (inherit (os->image os #:type type))
   (platform platform)))
e 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 (test-git-authenticate) #:use-module (git) #:use-module (guix git) #:use-module (guix git-authenticate) #:use-module ((guix channels) #:select (openpgp-fingerprint)) #:use-module ((guix diagnostics) #:select (formatted-message? formatted-message-arguments)) #:use-module (guix openpgp) #:use-module ((guix tests) #:select (random-text)) #:use-module (guix tests git) #:use-module (guix tests gnupg) #:use-module (guix build utils) #:use-module (srfi srfi-1) #:use-module (srfi srfi-34) #:use-module (srfi srfi-35) #:use-module (srfi srfi-64) #:use-module (rnrs bytevectors) #:use-module (rnrs io ports)) ;; Test the (guix git-authenticate) tools. (define (gpg+git-available?) (and (which (git-command)) (which (gpg-command)) (which (gpgconf-command)))) (test-begin "git-authenticate") (test-assert "unsigned commits" (with-temporary-git-repository directory '((add "a.txt" "A") (commit "first commit") (add "b.txt" "B") (commit "second commit")) (with-repository directory repository (let ((commit1 (find-commit repository "first")) (commit2 (find-commit repository "second"))) (guard (c ((unsigned-commit-error? c) (oid=? (git-authentication-error-commit c) (commit-id commit1)))) (authenticate-commits repository (list commit1 commit2) #:keyring-reference "master") 'failed))))) (unless (gpg+git-available?) (test-skip 1)) (test-assert "signed commits, SHA1 signature" (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file) ;; Force use of SHA1 for signatures. (call-with-output-file (string-append (getenv "GNUPGHOME") "/gpg.conf") (lambda (port) (display "digest-algo sha1" port))) (with-temporary-git-repository directory `((add "a.txt" "A") (add "signer.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Charlie")))))) (commit "first commit" (signer ,(key-fingerprint %ed25519-public-key-file)))) (with-repository directory repository (let ((commit (find-commit repository "first"))) (guard (c ((unsigned-commit-error? c) (oid=? (git-authentication-error-commit c) (commit-id commit)))) (authenticate-commits repository (list commit) #:keyring-reference "master") 'failed)))))) (unless (gpg+git-available?) (test-skip 1)) (test-assert "signed commits, default authorizations" (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file) (with-temporary-git-repository directory `((add "signer.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (commit "zeroth commit") (add "a.txt" "A") (commit "first commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (add "b.txt" "B") (commit "second commit" (signer ,(key-fingerprint %ed25519-public-key-file)))) (with-repository directory repository (let ((commit1 (find-commit repository "first")) (commit2 (find-commit repository "second"))) (authenticate-commits repository (list commit1 commit2) #:default-authorizations (list (openpgp-public-key-fingerprint (read-openpgp-packet %ed25519-public-key-file))) #:keyring-reference "master")))))) (unless (gpg+git-available?) (test-skip 1)) (test-assert "signed commits, .guix-authorizations" (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file) (with-temporary-git-repository directory `((add "signer.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Charlie")))))) (commit "zeroth commit") (add "a.txt" "A") (commit "first commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ()))) ;empty (commit "second commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (add "b.txt" "B") (commit "third commit" (signer ,(key-fingerprint %ed25519-public-key-file)))) (with-repository directory repository (let ((commit1 (find-commit repository "first")) (commit2 (find-commit repository "second")) (commit3 (find-commit repository "third"))) ;; COMMIT1 and COMMIT2 are fine. (and (authenticate-commits repository (list commit1 commit2) #:keyring-reference "master") ;; COMMIT3 is signed by an unauthorized key according to its ;; parent's '.guix-authorizations' file. (guard (c ((unauthorized-commit-error? c) (and (oid=? (git-authentication-error-commit c) (commit-id commit3)) (bytevector=? (openpgp-public-key-fingerprint (unauthorized-commit-error-signing-key c)) (openpgp-public-key-fingerprint (read-openpgp-packet %ed25519-public-key-file)))))) (authenticate-commits repository (list commit1 commit2 commit3) #:keyring-reference "master") 'failed))))))) (unless (gpg+git-available?) (test-skip 1)) (test-assert "signed commits, .guix-authorizations, unauthorized merge" (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file %ed25519-2-public-key-file %ed25519-2-secret-key-file) (with-temporary-git-repository directory `((add "signer1.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add "signer2.key" ,(call-with-input-file %ed25519-2-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Alice")))))) (commit "zeroth commit") (add "a.txt" "A") (commit "first commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (branch "devel") (checkout "devel") (add "devel/1.txt" "1") (commit "first devel commit" (signer ,(key-fingerprint %ed25519-2-public-key-file))) (checkout "master") (add "b.txt" "B") (commit "second commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (merge "devel" "merge" (signer ,(key-fingerprint %ed25519-public-key-file)))) (with-repository directory repository (let ((master1 (find-commit repository "first commit")) (master2 (find-commit repository "second commit")) (devel1 (find-commit repository "first devel commit")) (merge (find-commit repository "merge"))) (define (correct? c commit) (and (oid=? (git-authentication-error-commit c) (commit-id commit)) (bytevector=? (openpgp-public-key-fingerprint (unauthorized-commit-error-signing-key c)) (openpgp-public-key-fingerprint (read-openpgp-packet %ed25519-2-public-key-file))))) (and (authenticate-commits repository (list master1 master2) #:keyring-reference "master") ;; DEVEL1 is signed by an unauthorized key according to its ;; parent's '.guix-authorizations' file. (guard (c ((unauthorized-commit-error? c) (correct? c devel1))) (authenticate-commits repository (list master1 devel1) #:keyring-reference "master") #f) ;; MERGE is authorized but one of its ancestors is not. (guard (c ((unauthorized-commit-error? c) (correct? c devel1))) (authenticate-commits repository (list master1 master2 devel1 merge) #:keyring-reference "master") #f))))))) (unless (gpg+git-available?) (test-skip 1)) (test-assert "signed commits, .guix-authorizations, authorized merge" (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file %ed25519-2-public-key-file %ed25519-2-secret-key-file) (with-temporary-git-repository directory `((add "signer1.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add "signer2.key" ,(call-with-input-file %ed25519-2-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Alice")))))) (commit "zeroth commit") (add "a.txt" "A") (commit "first commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (branch "devel") (checkout "devel") (add ".guix-authorizations" ,(object->string ;add the second signer `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Alice")) (,(key-fingerprint %ed25519-2-public-key-file)))))) (commit "first devel commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (add "devel/2.txt" "2") (commit "second devel commit" (signer ,(key-fingerprint %ed25519-2-public-key-file))) (checkout "master") (add "b.txt" "B") (commit "second commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (merge "devel" "merge" (signer ,(key-fingerprint %ed25519-public-key-file))) ;; After the merge, the second signer is authorized. (add "c.txt" "C") (commit "third commit" (signer ,(key-fingerprint %ed25519-2-public-key-file)))) (with-repository directory repository (let ((master1 (find-commit repository "first commit")) (master2 (find-commit repository "second commit")) (devel1 (find-commit repository "first devel commit")) (devel2 (find-commit repository "second devel commit")) (merge (find-commit repository "merge")) (master3 (find-commit repository "third commit"))) (authenticate-commits repository (list master1 master2 devel1 devel2 merge master3) #:keyring-reference "master")))))) (unless (gpg+git-available?) (test-skip 1)) (test-assert "signed commits, .guix-authorizations removed" (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file) (with-temporary-git-repository directory `((add "signer.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Charlie")))))) (commit "zeroth commit") (add "a.txt" "A") (commit "first commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (remove ".guix-authorizations") (commit "second commit" (signer ,(key-fingerprint %ed25519-public-key-file))) (add "b.txt" "B") (commit "third commit" (signer ,(key-fingerprint %ed25519-public-key-file)))) (with-repository directory repository (let ((commit1 (find-commit repository "first")) (commit2 (find-commit repository "second")) (commit3 (find-commit repository "third"))) ;; COMMIT1 and COMMIT2 are fine. (and (authenticate-commits repository (list commit1 commit2) #:keyring-reference "master") ;; COMMIT3 is rejected because COMMIT2 removes ;; '.guix-authorizations'. (guard (c ((unauthorized-commit-error? c) (oid=? (git-authentication-error-commit c) (commit-id commit2)))) (authenticate-commits repository (list commit1 commit2 commit3) #:keyring-reference "master") 'failed))))))) (unless (gpg+git-available?) (test-skip 1)) (test-assert "introductory commit, valid signature" (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file) (let ((fingerprint (key-fingerprint %ed25519-public-key-file))) (with-temporary-git-repository directory `((add "signer.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Charlie")))))) (commit "zeroth commit" (signer ,fingerprint)) (add "a.txt" "A") (commit "first commit" (signer ,fingerprint))) (with-repository directory repository (let ((commit0 (find-commit repository "zero")) (commit1 (find-commit repository "first"))) ;; COMMIT0 is signed with the right key, and COMMIT1 is fine. (authenticate-repository repository (commit-id commit0) (openpgp-fingerprint fingerprint) #:keyring-reference "master" #:cache-key (random-text)))))))) (unless (gpg+git-available?) (test-skip 1)) (test-equal "introductory commit, missing signature" 'intro-lacks-signature (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file) (let ((fingerprint (key-fingerprint %ed25519-public-key-file))) (with-temporary-git-repository directory `((add "signer.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Charlie")))))) (commit "zeroth commit") ;unsigned! (add "a.txt" "A") (commit "first commit" (signer ,fingerprint))) (with-repository directory repository (let ((commit0 (find-commit repository "zero"))) ;; COMMIT0 is not signed. (guard (c ((formatted-message? c) ;; Message like "commit ~a lacks a signature". (and (equal? (formatted-message-arguments c) (list (oid->string (commit-id commit0)))) 'intro-lacks-signature))) (authenticate-repository repository (commit-id commit0) (openpgp-fingerprint fingerprint) #:keyring-reference "master" #:cache-key (random-text))))))))) (unless (gpg+git-available?) (test-skip 1)) (test-equal "introductory commit, wrong signature" 'wrong-intro-signing-key (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file %ed25519-2-public-key-file %ed25519-2-secret-key-file) (let ((fingerprint (key-fingerprint %ed25519-public-key-file)) (wrong-fingerprint (key-fingerprint %ed25519-2-public-key-file))) (with-temporary-git-repository directory `((add "signer1.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add "signer2.key" ,(call-with-input-file %ed25519-2-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Charlie")))))) (commit "zeroth commit" (signer ,wrong-fingerprint)) (add "a.txt" "A") (commit "first commit" (signer ,fingerprint))) (with-repository directory repository (let ((commit0 (find-commit repository "zero")) (commit1 (find-commit repository "first"))) ;; COMMIT0 is signed with the wrong key--not the one passed as the ;; SIGNER argument to 'authenticate-repository'. (guard (c ((formatted-message? c) ;; Message like "commit ~a signed by ~a instead of ~a". (and (equal? (formatted-message-arguments c) (list (oid->string (commit-id commit0)) wrong-fingerprint fingerprint)) 'wrong-intro-signing-key))) (authenticate-repository repository (commit-id commit0) (openpgp-fingerprint fingerprint) #:keyring-reference "master" #:cache-key (random-text))))))))) (unless (gpg+git-available?) (test-skip 1)) (test-equal "authenticate-repository, target not a descendant of intro" 'target-commit-not-a-descendant-of-intro (with-fresh-gnupg-setup (list %ed25519-public-key-file %ed25519-secret-key-file) (let ((fingerprint (key-fingerprint %ed25519-public-key-file))) (with-temporary-git-repository directory `((add "signer.key" ,(call-with-input-file %ed25519-public-key-file get-string-all)) (add ".guix-authorizations" ,(object->string `(authorizations (version 0) ((,(key-fingerprint %ed25519-public-key-file) (name "Charlie")))))) (commit "zeroth commit" (signer ,fingerprint)) (branch "pre-intro-branch") (checkout "pre-intro-branch") (add "b.txt" "B") (commit "alternate commit" (signer ,fingerprint)) (checkout "master") (add "a.txt" "A") (commit "first commit" (signer ,fingerprint)) (add "c.txt" "C") (commit "second commit" (signer ,fingerprint))) (with-repository directory repository (let ((commit1 (find-commit repository "first")) (commit-alt (commit-lookup repository (reference-target (branch-lookup repository "pre-intro-branch"))))) (guard (c ((formatted-message? c) (and (equal? (formatted-message-arguments c) (list (oid->string (commit-id commit-alt)) (oid->string (commit-id commit1)))) 'target-commit-not-a-descendant-of-intro))) (authenticate-repository repository (commit-id commit1) (openpgp-fingerprint fingerprint) #:end (commit-id commit-alt) #:keyring-reference "master" #:cache-key (random-text))))))))) (test-end "git-authenticate")