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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Ludovic Courtès <ludo@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 (test-git-authenticate)
#:use-module (git)
#:use-module (guix git)
#:use-module (guix git-authenticate)
#:use-module (guix openpgp)
#: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-64)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports))
;; Test the (guix git-authenticate) tools.
(define %ed25519-public-key-file
(search-path %load-path "tests/ed25519.key"))
(define %ed25519-secret-key-file
(search-path %load-path "tests/ed25519.sec"))
(define %ed25519bis-public-key-file
(search-path %load-path "tests/ed25519bis.key"))
(define %ed25519bis-secret-key-file
(search-path %load-path "tests/ed25519bis.sec"))
(define (read-openpgp-packet file)
(get-openpgp-packet
(open-bytevector-input-port
(call-with-input-file file read-radix-64))))
(define key-fingerprint
(compose openpgp-format-fingerprint
openpgp-public-key-fingerprint
read-openpgp-packet))
(define (key-id file)
(define id
(openpgp-public-key-id (read-openpgp-packet)))
(string-pad (number->string id 16) 16 #\0))
(define (gpg+git-available?)
(and (which (git-command))
(which (gpg-command)) (which (gpgconf-command))))
(test-begin "git-authenticate")
(unless (which (git-command)) (test-skip 1))
(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, 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
%ed25519bis-public-key-file
%ed25519bis-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 %ed25519bis-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 %ed25519bis-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 %ed25519bis-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
%ed25519bis-public-key-file
%ed25519bis-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 %ed25519bis-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
%ed25519bis-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 %ed25519bis-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 %ed25519bis-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"))))))
(test-end "git-authenticate")
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