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;;; epg-tests.el --- Test suite for epg.el -*- lexical-binding: t -*-
;; Copyright (C) 2013-2018 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs 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 Emacs 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 Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'ert)
(require 'epg)
(defvar epg-tests-context nil)
(defvar epg-tests-data-directory
(expand-file-name "data/epg" (getenv "EMACS_TEST_DIRECTORY"))
"Directory containing epg test data.")
(defun epg-tests-find-usable-gpg-configuration (&optional _require-passphrase)
(epg-find-configuration 'OpenPGP 'no-cache))
(defun epg-tests-passphrase-callback (_c _k _d)
;; Need to create a copy here, since the string will be wiped out
;; after the use.
(copy-sequence "test0123456789"))
(cl-defmacro with-epg-tests ((&optional &key require-passphrase
require-public-key
require-secret-key)
&rest body)
"Set up temporary locations and variables for testing."
(declare (indent 1) (debug (sexp body)))
`(let* ((epg-tests-home-directory (make-temp-file "epg-tests-homedir" t))
(process-environment
(append
(list "GPG_AGENT_INFO"
(format "GNUPGHOME=%s" epg-tests-home-directory))
process-environment)))
(unwind-protect
(let ((context (epg-make-context 'OpenPGP)))
(setf (epg-context-program context)
(alist-get 'program
(epg-tests-find-usable-gpg-configuration
,(if require-passphrase
`'require-passphrase))))
(setf (epg-context-home-directory context)
epg-tests-home-directory)
,(if require-passphrase
`(with-temp-file (expand-file-name
"gpg-agent.conf" epg-tests-home-directory)
(insert "pinentry-program "
(expand-file-name "dummy-pinentry"
epg-tests-data-directory)
"\n")
(epg-context-set-passphrase-callback
context
#'epg-tests-passphrase-callback)))
,(if require-public-key
`(epg-import-keys-from-file
context
(expand-file-name "pubkey.asc" epg-tests-data-directory)))
,(if require-secret-key
`(epg-import-keys-from-file
context
(expand-file-name "seckey.asc" epg-tests-data-directory)))
(with-temp-buffer
(make-local-variable 'epg-tests-context)
(setq epg-tests-context context)
,@body))
(when (file-directory-p epg-tests-home-directory)
(delete-directory epg-tests-home-directory t)))))
(ert-deftest epg-decrypt-1 ()
(skip-unless (epg-tests-find-usable-gpg-configuration 'require-passphrase))
(with-epg-tests (:require-passphrase t)
(should (equal "test"
(epg-decrypt-string epg-tests-context "\
-----BEGIN PGP MESSAGE-----
Version: GnuPG v2
jA0EAwMCE19JBLTvvmhgyRrGGglRbnKkK9PJG8fDwO5ccjysrR7IcdNcnA==
=U8z7
-----END PGP MESSAGE-----")))))
(ert-deftest epg-roundtrip-1 ()
(skip-unless (epg-tests-find-usable-gpg-configuration 'require-passphrase))
(with-epg-tests (:require-passphrase t)
(let ((cipher (epg-encrypt-string epg-tests-context "symmetric" nil)))
(should (equal "symmetric"
(epg-decrypt-string epg-tests-context cipher))))))
(ert-deftest epg-roundtrip-2 ()
(skip-unless (epg-tests-find-usable-gpg-configuration 'require-passphrase))
(with-epg-tests (:require-passphrase t
:require-public-key t
:require-secret-key t)
(let* ((recipients (epg-list-keys epg-tests-context "joe@example.com"))
(cipher (epg-encrypt-string epg-tests-context "public key"
recipients nil t)))
(should (equal "public key"
(epg-decrypt-string epg-tests-context cipher))))))
(ert-deftest epg-sign-verify-1 ()
(skip-unless (epg-tests-find-usable-gpg-configuration 'require-passphrase))
(with-epg-tests (:require-passphrase t
:require-public-key t
:require-secret-key t)
(let (signature verify-result)
(setf (epg-context-signers epg-tests-context)
(epg-list-keys epg-tests-context "joe@example.com"))
(setq signature (epg-sign-string epg-tests-context "signed" t))
(epg-verify-string epg-tests-context signature "signed")
(setq verify-result (epg-context-result-for context 'verify))
(should (= 1 (length verify-result)))
(should (eq 'good (epg-signature-status (car verify-result)))))))
(ert-deftest epg-sign-verify-2 ()
(skip-unless (epg-tests-find-usable-gpg-configuration 'require-passphrase))
(with-epg-tests (:require-passphrase t
:require-public-key t
:require-secret-key t)
(let (signature verify-result)
(setf (epg-context-signers epg-tests-context)
(epg-list-keys epg-tests-context "joe@example.com"))
(setq signature (epg-sign-string epg-tests-context "clearsigned" 'clear))
;; Clearsign signature always ends with a new line.
(should (equal "clearsigned\n"
(epg-verify-string epg-tests-context signature)))
(setq verify-result (epg-context-result-for context 'verify))
(should (= 1 (length verify-result)))
(should (eq 'good (epg-signature-status (car verify-result)))))))
(ert-deftest epg-sign-verify-3 ()
(skip-unless (epg-tests-find-usable-gpg-configuration 'require-passphrase))
(with-epg-tests (:require-passphrase t
:require-public-key t
:require-secret-key t)
(let (signature verify-result)
(setf (epg-context-signers epg-tests-context)
(epg-list-keys epg-tests-context "joe@example.com"))
(setq signature (epg-sign-string epg-tests-context "normal signed"))
(should (equal "normal signed"
(epg-verify-string epg-tests-context signature)))
(setq verify-result (epg-context-result-for context 'verify))
(should (= 1 (length verify-result)))
(should (eq 'good (epg-signature-status (car verify-result)))))))
(ert-deftest epg-import-1 ()
(skip-unless (epg-tests-find-usable-gpg-configuration 'require-passphrase))
(with-epg-tests (:require-passphrase nil)
(should (= 0 (length (epg-list-keys epg-tests-context))))
(should (= 0 (length (epg-list-keys epg-tests-context nil t)))))
(with-epg-tests (:require-passphrase nil
:require-public-key t)
(should (= 1 (length (epg-list-keys epg-tests-context))))
(should (= 0 (length (epg-list-keys epg-tests-context nil t)))))
(with-epg-tests (:require-public-key nil
:require-public-key t
:require-secret-key t)
(should (= 1 (length (epg-list-keys epg-tests-context))))
(should (= 1 (length (epg-list-keys epg-tests-context nil t))))))
(provide 'epg-tests)
;;; epg-tests.el ends here
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