Add (guix pki).

* guix/pki.scm, tests/pki.scm: New files.
* Makefile.am (MODULES): Add 'guix/pki.scm'.
  (SCM_TESTS): Add 'tests/pki.scm'.

tests/pki.scm

@@ -0,0 +1,51 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 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-pki)
+  #:use-module (guix pki)
+  #:use-module (guix pk-crypto)
+  #:use-module (rnrs io ports)
+  #:use-module (srfi srfi-64))
+
+;; Test the (guix pki) module.
+
+(define %public-key
+  (call-with-input-file %public-key-file
+    (compose string->canonical-sexp
+             get-string-all)))
+
+(test-begin "pki")
+
+(test-assert "current-acl"
+  (not (not (member (canonical-sexp->sexp %public-key)
+                    (map canonical-sexp->sexp
+                         (acl->public-keys (current-acl)))))))
+
+(test-assert "authorized-key? public-key current-acl"
+  (authorized-key? %public-key))
+
+(test-assert "authorized-key? public-key empty-acl"
+  (not (authorized-key? %public-key (public-keys->acl '()))))
+
+(test-assert "authorized-key? public-key singleton"
+  (authorized-key? %public-key (public-keys->acl (list %public-key))))
+
+(test-end)
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))