;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020, 2022 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 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-reposit