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#!/usr/bin/env python3
#
# Copyright (C) 2016 g10 Code GmbH
# Copyright (C) 2004,2008 Igor Belyi <belyi@users.sourceforge.net>
#
# 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 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 this program; if not, see <https://www.gnu.org/licenses/>.
# Sample of unattended signing/verifying of a message.
# It uses keys for joe+gpg@example.org generated by genkey.py script
from __future__ import absolute_import, print_function, unicode_literals
import sys
import gpg
from gpg.constants.sig import mode
del absolute_import, print_function, unicode_literals
user = "joe+gpg"
with gpg.Context(pinentry_mode=gpg.constants.PINENTRY_MODE_LOOPBACK) as c:
keys = list(c.keylist(user))
if len(keys) == 0:
sys.exit("No key matching {}.".format(user))
c.signers = keys[:1]
c.set_passphrase_cb(lambda *args: "Crypt0R0cks")
signed_data, _ = c.sign(b"Test message", mode=mode.CLEAR)
data, result = c.verify(signed_data, verify=keys[:1])
print("Data: {!r}\nSignature: {!s}".format(data, result.signatures[0]))
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