#!/usr/bin/env python3

# -*- coding: utf-8 -*-

from __future__ import absolute_import, division, unicode_literals

# Copyright (C) 2018 Ben McGinnes <ben@gnupg.org>

#

# This program 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 2 of the License, or (at your option) any later

# version.

#

# This program is free software; you can redistribute it and/or modify it under

# the terms of the GNU Lesser General Public License as published by the Free

# Software Foundation; either version 2.1 of the License, or (at your option)

# any later version.

#

# This program 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 and the GNU

# Lesser General Public License for more details.

#

# You should have received a copy of the GNU General Public License and the GNU

# Lesser General Public along with this program; if not, see

# <https://www.gnu.org/licenses/>.

import gpg

import os.path

print("""

This script revokes a user ID on an existing key.

The gpg-agent and pinentry are invoked to enter the passphrase.

""")

c = gpg.Context()

homedir = input("Enter the GPG configuration directory path (optional): ")

fpr0 = input("Enter the fingerprint of the key to modify: ")

uid_name = input("Enter the name of the user ID: ")

uid_email = input("Enter the email address of the user ID: ")

uid_cmnt = input("Enter a comment to include (optional): ")

if homedir.startswith("~"):

    if os.path.exists(os.path.expanduser(homedir)) is True:

        c.home_dir = os.path.expanduser(homedir)

    else:

        pass

elif os.path.exists(homedir) is True:

    c.home_dir = homedir

else:

    pass

fpr = "".join(fpr0.split())

if uid_cmnt:

    userid = "{0} ({1}) <{2}>".format(uid_name, uid_cmnt, uid_email)

else:

    userid = "{0} <{2}>".format(uid_name, uid_email)

key = c.get_key(fpr, secret=True)

c.key_revoke_uid(key, userid)