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t-sign.py
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#!/usr/bin/env python3
# Copyright (C) 2016 g10 Code GmbH
#
# This file is part of GPGME.
#
# GPGME 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.
#
# GPGME 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 Lesser General
# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, see <http://www.gnu.org/licenses/>.
import os
import pyme
from pyme import core, constants
import support
def fail(msg):
raise RuntimeError(msg)
def check_result(r, typ):
if r.invalid_signers:
fail("Invalid signer found: {}".format(r.invalid_signers.fpr))
if len(r.signatures) != 1:
fail("Unexpected number of signatures created")
signature = r.signatures[0]
if signature.type != typ:
fail("Wrong type of signature created")
if signature.pubkey_algo != constants.PK_DSA:
fail("Wrong pubkey algorithm reported: {}".format(
signature.pubkey_algo))
if signature.hash_algo != constants.MD_SHA1:
fail("Wrong hash algorithm reported: {}".format(
signature.hash_algo))
if signature.sig_class != 1:
fail("Wrong signature class reported: {}".format(
signature.sig_class))
if signature.fpr != "A0FF4590BB6122EDEF6E3C542D727CC768697734":
fail("Wrong fingerprint reported: {}".format(signature.fpr))
support.init_gpgme(constants.PROTOCOL_OpenPGP)
c = core.Context()
c.set_textmode(True)
c.set_armor(True)
source = core.Data("Hallo Leute\n")
sink = core.Data()
c.op_sign(source, sink, constants.SIG_MODE_NORMAL)
result = c.op_sign_result()
check_result(result, constants.SIG_MODE_NORMAL)
support.print_data(sink)
# Now a detached signature.
source.seek(0, os.SEEK_SET)
sink = core.Data()
c.op_sign(source, sink, constants.SIG_MODE_DETACH)
result = c.op_sign_result()
check_result(result, constants.SIG_MODE_DETACH)
support.print_data(sink)
# And finally a cleartext signature. */
source.seek(0, os.SEEK_SET)
sink = core.Data()
c.op_sign(source, sink, constants.SIG_MODE_CLEAR)
result = c.op_sign_result()
check_result(result, constants.SIG_MODE_CLEAR)
support.print_data(sink)
# Idiomatic interface.
with pyme.Context(armor=True, textmode=True) as c:
message = "Hallo Leute\n".encode()
signed, _ = c.sign(message)
assert len(signed) > 0
assert signed.find(b'BEGIN PGP MESSAGE') > 0, 'Message not found'
signed, _ = c.sign(message, mode=pyme.constants.SIG_MODE_DETACH)
assert len(signed) > 0
assert signed.find(b'BEGIN PGP SIGNATURE') > 0, 'Signature not found'
signed, _ = c.sign(message, mode=pyme.constants.SIG_MODE_CLEAR)
assert len(signed) > 0
assert signed.find(b'BEGIN PGP SIGNED MESSAGE') > 0, 'Message not found'
assert signed.find(message) > 0, 'Message content not found'
assert signed.find(b'BEGIN PGP SIGNATURE') > 0, 'Signature not found'
with pyme.Context() as c:
message = "Hallo Leute\n".encode()
c.signers = [c.get_key(support.sign_only, True)]
c.sign(message)
c.signers = [c.get_key(support.encrypt_only, True)]
try:
c.sign(message)
except pyme.errors.InvalidSigners as e:
assert len(e.signers) == 1
assert support.encrypt_only.endswith(e.signers[0].fpr)
else:
assert False, "Expected an InvalidSigners error, got none"

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