1#!/usr/bin/env python3
2# -*- coding: utf-8 -*-
3
4from __future__ import absolute_import, division, unicode_literals
5
6# Copyright (C) 2018 Ben McGinnes <ben@gnupg.org>
7#
8# This program is free software; you can redistribute it and/or modify it under
9# the terms of the GNU General Public License as published by the Free Software
10# Foundation; either version 2 of the License, or (at your option) any later
11# version.
12#
13# This program is free software; you can redistribute it and/or modify it under
14# the terms of the GNU Lesser General Public License as published by the Free
15# Software Foundation; either version 2.1 of the License, or (at your option)
16# any later version.
17#
18# This program is distributed in the hope that it will be useful, but WITHOUT
19# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
20# FOR A PARTICULAR PURPOSE.  See the GNU General Public License and the GNU
21# Lesser General Public License for more details.
22#
23# You should have received a copy of the GNU General Public License and the GNU
24# Lesser General Public along with this program; if not, see
25# <https://www.gnu.org/licenses/>.
26
27import gpg
28import sys
29
30"""
31Clear-signs a file with a specified key.  If entering both the key and the
32filename on the command line, the key must be entered first.
33"""
34
35if len(sys.argv) > 3:
36    logrus = sys.argv[1]
37    filename = " ".join(sys.argv[2:])
38elif len(sys.argv) == 3:
39    logrus = sys.argv[1]
40    filename = sys.argv[2]
41elif len(sys.argv) == 2:
42    logrus = sys.argv[1]
43    filename = input("Enter the path and filename to sign: ")
44else:
45    logrus = input("Enter the fingerprint or key ID to sign with: ")
46    filename = input("Enter the path and filename to sign: ")
47
48with open(filename, "rb") as f:
49    text = f.read()
50
51key = list(gpg.Context().keylist(pattern=logrus))
52
53with gpg.Context(armor=True, signers=key) as c:
54    signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.CLEAR)
55    with open("{0}.asc".format(filename), "wb") as f:
56        f.write(signed_data)
57