;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; 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 (gnu packages authentication)
  #:use-module (gnu packages)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages pkg-config)
  #:use-module (guix build-system gnu)
  #:use-module (guix download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages))

(define-public oath-toolkit
  ;; If gcc@7 breaks this package before its next release, try patching it:
  ;; <https://gitlab.com/oath-toolkit/oath-toolkit/issues/2#note_52958748>.
  (package
    (name "oath-toolkit")
    (version "2.6.2")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://download.savannah.nongnu.org/releases/"
                           name "/" name "-" version ".tar.gz"))
       (patches (search-patches "oath-toolkit-glibc-compat.patch"))
       (sha256
        (base32 "182ah8vfbg0yhv6mh1b6ap944d0na6x7lpfkwkmzb6jl9gx4cd5h"))))
    (build-system gnu-build-system)
    (arguments
     ;; TODO ‘--enable-pskc’ causes xmlsec-related test suite failures.
     `(#:configure-flags
       (list "--enable-pam")
       #:phases
       (modify-phases %standard-phases
         (add-after 'install 'delete-static-libraries
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (lib (string-append out "/lib")))
               (for-each delete-file (find-files lib "\\.a$"))
               #t))))))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("linux-pam" ,linux-pam)))       ; for --enable-pam
    (home-page "https://www.nongnu.org/oath-toolkit/")
    (synopsis "One-time password (OTP) components")
    ;; TODO Add the following items after they've been enabled.
    ;; @item @command{pskctool}, a command-line tool for manipulating secret key
    ;; files in the Portable Symmetric Key Container (@dfn{PSKC}) format
    ;; described in RFC6030.
    ;; @item @code{libpskc}, a shared and static C library for PSKC handling.
    (description
     "The @dfn{OATH} (Open AuTHentication) Toolkit provides various components
for building one-time password (@dfn{OTP}) authentication systems:

@itemize
@item @command{oathtool}, a command-line tool for generating & validating OTPs.
@item @code{liboath}, a C library for OATH handling.
@item @code{pam_oath}, a PAM module for pluggable login authentication.
@end itemize

Supported technologies include the event-based @dfn{HOTP} algorithm (RFC4226)
and the time-based @dfn{TOTP} algorithm (RFC6238).")
    (license (list license:lgpl2.1+     ; the libraries (liboath/ & libpskc/)
                   license:gpl3+))))    ; the tools (everything else)
