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create-key.py
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#!/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 generates a new key which does not expire.
The gpg-agent and pinentry are invoked to set the passphrase.
""")
c = gpg.Context()
homedir = input("Enter the GPG configuration directory path (optional): ")
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): ")
key_algo = input("Enter the key algorithm, RSA or DSA (default is RSA): ")
key_size = input("Enter the key size (2048-4096, default is 2048): ")
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
if uid_cmnt:
userid = "{0} ({1}) <{2}>".format(uid_name, uid_cmnt, uid_email)
else:
userid = "{0} <{2}>".format(uid_name, uid_email)
if key_algo.lower() == "dsa":
ka = "dsa"
else:
ka = "rsa"
if len(key_size) == 4:
try:
ks0 = int(key_size)
except ValueError:
ks0 = None
if ks0 is None:
ks = "2048"
else:
if ks0 < 2048:
ks = "2048"
elif ka == "dsa" and ks0 > 3072:
ks = "3072"
elif ka == "rsa" and ks0 > 4096:
ks = "4096"
else:
ks = key_size
else:
ks = "2048"
keyalgo = "{0}{1}".format(ka, ks)
newkey = c.create_key(userid, algorithm=keyalgo, expires=False,
passphrase=True, certify=True)
key = c.get_key(newkey.fpr, secret=True)
if ka == "rsa":
newsub = c.create_subkey(key, algorithm=keyalgo, expires=False,
passphrase=True, encrypt=True)
else:
newsub = c.create_subkey(key, expires=False, passphrase=True,
encrypt=True)

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