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# -*- coding: utf-8 -*-
# vim: ts=4 sw=4 tw=88 et ai si
#
# Copyright (c) 2022 Benedikt Wildenhain
# License: GPLv2
# Author: Benedikt Wildenhain <benedikt.wildenhain@hs-bochum.de>
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License, version 2 or any later version,
# as published by the Free Software Foundation.
#
# 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.
import unittest
import os
import subprocess
import sys
import tempfile
import tests.helpers
import shutil
from dataclasses import dataclass
@dataclass
class Key:
gnupghome: str
uid: str
fpr: str = None
testkeys = {
"correct": Key(None, "correct <foo@bar.org>", None),
"unknown": Key(None, "unknown <blub@bla.net>", None),
}
class TestCLI(unittest.TestCase):
def test_valid_signature(self):
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/test.image.bmap.v2.0",
"--bmap-sig",
"tests/test-data/signatures/test.image.bmap.v2.0correct.det.asc",
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
)
self.assertEqual(completed_process.returncode, 0)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(
b"successfully verified bmap file signature", completed_process.stderr
)
def test_valid_signature_fingerprint(self):
assert testkeys["correct"].fpr is not None
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/signatures/test.image.bmap.v2.0correct.asc",
"--fingerprint",
testkeys["correct"].fpr,
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
)
self.assertEqual(completed_process.returncode, 0)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(
b"successfully verified bmap file signature", completed_process.stderr
)
def test_valid_signature_fingerprint_keyring(self):
assert testkeys["correct"].fpr is not None
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/signatures/test.image.bmap.v2.0correct.asc",
"--fingerprint",
testkeys["correct"].fpr,
"--keyring",
testkeys["correct"].gnupghome + ".keyring",
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
# should work without GNUPGHOME set because we supply --keyring
env={k: v for k, v in os.environ.items() if k != "GNUPGHOME"},
)
self.assertEqual(completed_process.returncode, 0)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(
b"successfully verified bmap file signature", completed_process.stderr
)
def test_unknown_signer(self):
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/test.image.bmap.v2.0",
"--bmap-sig",
"tests/test-data/signatures/test.image.bmap.v2.0unknown.det.asc",
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
)
self.assertEqual(completed_process.returncode, 1)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(b"discovered a BAD GPG signature", completed_process.stderr)
def test_wrong_signature(self):
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/test.image.bmap.v1.4",
"--bmap-sig",
"tests/test-data/signatures/test.image.bmap.v2.0correct.det.asc",
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
)
self.assertEqual(completed_process.returncode, 1)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(b"discovered a BAD GPG signature", completed_process.stderr)
def test_wrong_signature_unknown_signer(self):
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/test.image.bmap.v1.4",
"--bmap-sig",
"tests/test-data/signatures/test.image.bmap.v2.0unknown.det.asc",
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
)
self.assertEqual(completed_process.returncode, 1)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(b"discovered a BAD GPG signature", completed_process.stderr)
def test_clearsign(self):
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/signatures/test.image.bmap.v2.0correct.asc",
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
)
self.assertEqual(completed_process.returncode, 0)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(
b"successfully verified bmap file signature", completed_process.stderr
)
def test_fingerprint_without_signature(self):
assert testkeys["correct"].fpr is not None
completed_process = subprocess.run(
[
"bmaptool",
"copy",
"--bmap",
"tests/test-data/test.image.bmap.v2.0",
"--fingerprint",
testkeys["correct"].fpr,
"tests/test-data/test.image.gz",
self.tmpfile,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=False,
)
self.assertEqual(completed_process.returncode, 1)
self.assertEqual(completed_process.stdout, b"")
self.assertIn(
b"no signature found but --fingerprint given", completed_process.stderr
)
def setUp(self):
try:
import gpg
except ImportError:
self.skipTest("python module 'gpg' missing")
os.makedirs("tests/test-data/signatures", exist_ok=True)
for key in testkeys.values():
assert key.gnupghome is None
key.gnupghome = tempfile.mkdtemp(prefix="bmaptool")
context = gpg.Context(home_dir=key.gnupghome)
dmkey = context.create_key(
key.uid,
algorithm="rsa3072",
expires_in=31536000,
sign=True,
certify=True,
)
key.fpr = dmkey.fpr
for bmapv in ["2.0", "1.4"]:
testp = "tests/test-data"
imbn = "test.image.bmap.v"
with open(f"{testp}/{imbn}{bmapv}", "rb") as bmapf:
bmapcontent = bmapf.read()
with open(
f"{testp}/signatures/{imbn}{bmapv}{key.uid.split()[0]}.asc",
"wb",
) as sigf:
signed_data, result = context.sign(
bmapcontent, mode=gpg.constants.sig.mode.CLEAR
)
sigf.write(signed_data)
plaintext, sigs = context.verify(signed_data, None)
with open(
f"{testp}/signatures/{imbn}{bmapv}{key.uid.split()[0]}.det.asc",
"wb",
) as detsigf:
signed_data, result = context.sign(
bmapcontent, mode=gpg.constants.sig.mode.DETACH
)
detsigf.write(signed_data)
# the file supplied to gpgv via --keyring must not be armored
context.armor = False
with open(f"{key.gnupghome}.keyring", "wb") as f:
f.write(context.key_export_minimal())
self.tmpfile = tempfile.mkstemp(prefix="testfile_", dir=".")[1]
os.environ["GNUPGHOME"] = testkeys["correct"].gnupghome
def tearDown(self):
os.unlink(self.tmpfile)
for key in testkeys.values():
shutil.rmtree(key.gnupghome)
os.unlink(f"{key.gnupghome}.keyring")
key.gnupghome = None
for bmapv in ["2.0", "1.4"]:
testp = "tests/test-data"
imbn = "test.image.bmap.v"
os.unlink(f"{testp}/signatures/{imbn}{bmapv}{key.uid.split()[0]}.asc")
os.unlink(
f"{testp}/signatures/{imbn}{bmapv}{key.uid.split()[0]}.det.asc"
)
os.rmdir("tests/test-data/signatures")
if __name__ == "__main__":
unittest.main()
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