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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 (tests-openpgp)
#:use-module (guix openpgp)
#:use-module (gcrypt base16)
#:use-module (gcrypt hash)
#:use-module (gcrypt pk-crypto)
#:use-module (ice-9 binary-ports)
#:use-module (ice-9 match)
#:use-module (rnrs bytevectors)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-64)
#:use-module (srfi srfi-71))
(define %radix-64-sample
;; Example of Radix-64 encoding from Section 6.6 of RFC4880.
"\
-----BEGIN PGP MESSAGE-----
Version: OpenPrivacy 0.99
yDgBO22WxBHv7O8X7O/jygAEzol56iUKiXmV+XmpCtmpqQUKiQrFqclFqUDBovzS
vBSFjNSiVHsuAA==
=njUN
-----END PGP MESSAGE-----\n")
(define %radix-64-sample/crc-mismatch
;; This time with a wrong CRC24 value.
"\
-----BEGIN PGP MESSAGE-----
yDgBO22WxBHv7O8X7O/jygAEzol56iUKiXmV+XmpCtmpqQUKiQrFqclFqUDBovzS
vBSFjNSiVHsuAA==
=AAAA
-----END PGP MESSAGE-----\n")
(define %civodul-fingerprint
"3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5")
(define %civodul-key-id #x090B11993D9AEBB5) ;civodul.key
;; Test keys. They were generated in a container along these lines:
;; guix environment -CP --ad-hoc gnupg pinentry
;; then, within the container:
;; mkdir ~/.gnupg
;; echo pinentry-program ~/.guix-profile/bin/pinentry-tty > ~/.gnupg/gpg-agent.conf
;; gpg --quick-gen-key '<ludo+test-rsa@chbouib.org>' rsa
;; or similar.
(define %rsa-key-id #xAE25DA2A70DEED59) ;rsa.key
(define %dsa-key-id #x587918047BE8BD2C) ;dsa.key
(define %ed25519-key-id #x771F49CBFAAE072D) ;ed25519.key
(define %rsa-key-fingerprint
(base16-string->bytevector
(string-downcase "385F86CFC86B665A5C165E6BAE25DA2A70DEED59")))
(define %dsa-key-fingerprint
(base16-string->bytevector
(string-downcase "2884A980422330A4F33DD97F587918047BE8BD2C")))
(define %ed25519-key-fingerprint
(base16-string->bytevector
(string-downcase "44D31E21AF7138F9B632280A771F49CBFAAE072D")))
;;; The following are detached signatures created commands like:
;;; echo 'Hello!' | gpg -sba --digest-algo sha512
;;; They are detached (no PACKET-ONE-PASS-SIGNATURE) and uncompressed.
(define %hello-signature/rsa
;; Signature of the ASCII string "Hello!\n".
"\
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEOF+Gz8hrZlpcFl5rriXaKnDe7VkFAl4SRF0ACgkQriXaKnDe
7VlIyQf/TU5rGUK42/C1ULoWvvm25Mjwh6xxoPPkuBxvos8bE6yKr/vJZePU3aSE
mjbVFcO7DioxHMqLd49j803bUtdllJVU18ex9MkKbKjapkgEGkJsuTTzqyONprgk
7xtZGBWuxkP1M6hJICJkA3Ys+sTdKalux/pzr5OWAe+gxytTF/vr/EyJzdmBxbJv
/fhd1SeVIXSw4c5gf2Wcvcgfy4N5CiLaUb7j4646KBTvDvmUMcDZ+vmKqC/XdQeQ
PrjArGKt40ErVd98fwvNHZnw7VQMx0A3nL3joL5g7/RckDOUb4mqKoqLsLd0wPHP
y32DiDUY9s3sy5OMzX4Y49em8vxvlg==
=ASEm
-----END PGP SIGNATURE-----")
(define %hello-signature/dsa
"\
-----BEGIN PGP SIGNATURE-----
iHUEABEIAB0WIQQohKmAQiMwpPM92X9YeRgEe+i9LAUCXhJFpQAKCRBYeRgEe+i9
LDAaAQC0lXPQepvZBANAUtRLMZuOwL9NQPkfhIwUXtLEBBzyFQD/So8DcybXpRBi
JKOiyAQQjMs/GJ6qMEQpRAhyyJRAock=
=iAEc
-----END PGP SIGNATURE-----")
(define %hello-signature/ed25519/sha256 ;digest-algo: sha256
"\
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQRE0x4hr3E4+bYyKAp3H0nL+q4HLQUCXqRADAAKCRB3H0nL+q4H
LUImAP9/foaSjPFC/MSr52LNV5ROSL9haea4jPpUP+N6ViFGowEA+AE/xpXPIqsz
R6CdxMevURuqUpqQ7rHeiMmdUepeewU=
=tLXy
-----END PGP SIGNATURE-----")
(define %hello-signature/ed25519/sha512 ;digest-algo: sha512
"\
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRE0x4hr3E4+bYyKAp3H0nL+q4HLQUCXqRAGgAKCRB3H0nL+q4H
LTeKAP0S8LiiosJXOARlYNdhfGw9j26lHrbwJh5CORGlaqqIJAEAoMYcmtNa2b6O
inlEwB/KQM88O9RwA8xH7X5a0rodOw4=
=68r/
-----END PGP SIGNATURE-----")
(define %hello-signature/ed25519/sha1 ;digest-algo: sha1
"\
-----BEGIN PGP SIGNATURE-----
iHUEABYCAB0WIQRE0x4hr3E4+bYyKAp3H0nL+q4HLQUCXqRALQAKCRB3H0nL+q4H
LdhEAQCfkdYhIVRa43oTNw9EL/TDFGQjXSHNRFVU0ktjkWbkQwEAjIXhvj2sqy79
Pz7oopeN72xgggYUNT37ezqN3MeCqw0=
=AE4G
-----END PGP SIGNATURE-----")
(test-begin "openpgp")
(test-equal "read-radix-64"
'(#t "PGP MESSAGE")
(let-values (((data type)
(call-with-input-string %radix-64-sample read-radix-64)))
(list (bytevector? data) type)))
(test-equal "read-radix-64, CRC mismatch"
'(#f "PGP MESSAGE")
(call-with-values
(lambda ()
(call-with-input-string %radix-64-sample/crc-mismatch
read-radix-64))
list))
(test-assert "get-openpgp-keyring"
(let* ((key (search-path %load-path "tests/civodul.key"))
(keyring (get-openpgp-keyring
(open-bytevector-input-port
(call-with-input-file key read-radix-64)))))
(let-values (((primary packets)
(lookup-key-by-id keyring %civodul-key-id)))
(let ((fingerprint (openpgp-public-key-fingerprint primary)))
(and (= (openpgp-public-key-id primary) %civodul-key-id)
(not (openpgp-public-key-subkey? primary))
(string=? (openpgp-format-fingerprint fingerprint)
%civodul-fingerprint)
(string=? (openpgp-user-id-value (find openpgp-user-id? packets))
"Ludovic Courtès <ludo@gnu.org>")
(eq? (lookup-key-by-fingerprint keyring fingerprint)
primary))))))
(test-equal "get-openpgp-detached-signature/ascii"
(list `(,%dsa-key-id ,%dsa-key-fingerprint dsa sha256)
`(,%rsa-key-id ,%rsa-key-fingerprint rsa sha256)
`(,%ed25519-key-id ,%ed25519-key-fingerprint eddsa sha256)
`(,%ed25519-key-id ,%ed25519-key-fingerprint eddsa sha512)
`(,%ed25519-key-id ,%ed25519-key-fingerprint eddsa sha1))
(map (lambda (str)
(let ((signature (get-openpgp-detached-signature/ascii
(open-input-string str))))
(list (openpgp-signature-issuer-key-id signature)
(openpgp-signature-issuer-fingerprint signature)
(openpgp-signature-public-key-algorithm signature)
(openpgp-signature-hash-algorithm signature))))
(list %hello-signature/dsa
%hello-signature/rsa
%hello-signature/ed25519/sha256
%hello-signature/ed25519/sha512
%hello-signature/ed25519/sha1)))
(test-equal "verify-openpgp-signature, missing key"
`(missing-key ,%rsa-key-fingerprint)
(let* ((keyring (get-openpgp-keyring (%make-void-port "r")))
(signature (get-openpgp-packet
(open-bytevector-input-port
(call-with-input-string %hello-signature/rsa
read-radix-64)))))
(let-values (((status key)
(verify-openpgp-signature signature keyring
(open-input-string "Hello!\n"))))
(list status key))))
(test-equal "verify-openpgp-signature, good signatures"
`((good-signature ,%rsa-key-id)
(good-signature ,%dsa-key-id)
(good-signature ,%ed25519-key-id)
(good-signature ,%ed25519-key-id)
(good-signature ,%ed25519-key-id))
(map (lambda (key signature)
(let* ((key (search-path %load-path key))
(keyring (get-openpgp-keyring
(open-bytevector-input-port
(call-with-input-file key read-radix-64))))
(signature (get-openpgp-packet
(open-bytevector-input-port
(call-with-input-string signature
read-radix-64)))))
(let-values (((status key)
(verify-openpgp-signature signature keyring
(open-input-string "Hello!\n"))))
(list status (openpgp-public-key-id key)))))
(list "tests/rsa.key" "tests/dsa.key"
"tests/ed25519.key" "tests/ed25519.key" "tests/ed25519.key")
(list %hello-signature/rsa %hello-signature/dsa
%hello-signature/ed25519/sha256
%hello-signature/ed25519/sha512
%hello-signature/ed25519/sha1)))
(test-equal "verify-openpgp-signature, bad signature"
`((bad-signature ,%rsa-key-id)
(bad-signature ,%dsa-key-id)
(bad-signature ,%ed25519-key-id)
(bad-signature ,%ed25519-key-id)
(bad-signature ,%ed25519-key-id))
(let ((keyring (fold (lambda (key keyring)
(let ((key (search-path %load-path key)))
(get-openpgp-keyring
(open-bytevector-input-port
(call-with-input-file key read-radix-64))
keyring)))
%empty-keyring
'("tests/rsa.key" "tests/dsa.key"
"tests/ed25519.key" "tests/ed25519.key"
"tests/ed25519.key"))))
(map (lambda (signature)
(let ((signature (get-openpgp-packet
(open-bytevector-input-port
(call-with-input-string signature
read-radix-64)))))
(let-values (((status key)
(verify-openpgp-signature signature keyring
(open-input-string "What?!"))))
(list status (openpgp-public-key-id key)))))
(list %hello-signature/rsa %hello-signature/dsa
%hello-signature/ed25519/sha256
%hello-signature/ed25519/sha512
%hello-signature/ed25519/sha1))))
(test-end "openpgp")
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