364 lines
16 KiB
Python
364 lines
16 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import base64
|
|
import datetime
|
|
import mock
|
|
|
|
from castellan.common.exception import KeyManagerError
|
|
import cryptography.exceptions as crypto_exceptions
|
|
from cryptography.hazmat.backends import default_backend
|
|
from cryptography.hazmat.primitives.asymmetric import dsa
|
|
from cryptography.hazmat.primitives.asymmetric import ec
|
|
from cryptography.hazmat.primitives.asymmetric import padding
|
|
from cryptography.hazmat.primitives.asymmetric import rsa
|
|
from oslo_utils import timeutils
|
|
|
|
from cursive import exception
|
|
from cursive import signature_utils
|
|
from cursive.tests import base
|
|
|
|
TEST_RSA_PRIVATE_KEY = rsa.generate_private_key(public_exponent=3,
|
|
key_size=1024,
|
|
backend=default_backend())
|
|
|
|
# secp521r1 is assumed to be available on all supported platforms
|
|
TEST_ECC_PRIVATE_KEY = ec.generate_private_key(ec.SECP521R1(),
|
|
default_backend())
|
|
|
|
TEST_DSA_PRIVATE_KEY = dsa.generate_private_key(key_size=3072,
|
|
backend=default_backend())
|
|
|
|
# Required image property names
|
|
(SIGNATURE, HASH_METHOD, KEY_TYPE, CERT_UUID) = (
|
|
signature_utils.SIGNATURE,
|
|
signature_utils.HASH_METHOD,
|
|
signature_utils.KEY_TYPE,
|
|
signature_utils.CERT_UUID
|
|
)
|
|
|
|
|
|
class FakeKeyManager(object):
|
|
|
|
def __init__(self):
|
|
self.certs = {'invalid_format_cert':
|
|
FakeCastellanCertificate('A' * 256, 'BLAH'),
|
|
'valid_format_cert':
|
|
FakeCastellanCertificate('A' * 256, 'X.509')}
|
|
|
|
def get(self, context, cert_uuid):
|
|
cert = self.certs.get(cert_uuid)
|
|
|
|
if cert is None:
|
|
raise KeyManagerError("No matching certificate found.")
|
|
|
|
return cert
|
|
|
|
|
|
class FakeCastellanCertificate(object):
|
|
|
|
def __init__(self, data, cert_format):
|
|
self.data = data
|
|
self.cert_format = cert_format
|
|
|
|
@property
|
|
def format(self):
|
|
return self.cert_format
|
|
|
|
def get_encoded(self):
|
|
return self.data
|
|
|
|
|
|
class FakeCryptoCertificate(object):
|
|
|
|
def __init__(self, pub_key=TEST_RSA_PRIVATE_KEY.public_key(),
|
|
not_valid_before=(timeutils.utcnow() -
|
|
datetime.timedelta(hours=1)),
|
|
not_valid_after=(timeutils.utcnow() +
|
|
datetime.timedelta(hours=2))):
|
|
self.pub_key = pub_key
|
|
self.cert_not_valid_before = not_valid_before
|
|
self.cert_not_valid_after = not_valid_after
|
|
|
|
def public_key(self):
|
|
return self.pub_key
|
|
|
|
@property
|
|
def not_valid_before(self):
|
|
return self.cert_not_valid_before
|
|
|
|
@property
|
|
def not_valid_after(self):
|
|
return self.cert_not_valid_after
|
|
|
|
|
|
class BadPublicKey(object):
|
|
|
|
def verifier(self, signature, padding, hash_method):
|
|
return None
|
|
|
|
|
|
class TestSignatureUtils(base.TestCase):
|
|
"""Test methods of signature_utils"""
|
|
|
|
def setUp(self):
|
|
super(TestSignatureUtils, self).setUp()
|
|
|
|
def tearDown(self):
|
|
super(TestSignatureUtils, self).tearDown()
|
|
|
|
def test_should_create_verifier(self):
|
|
image_props = {CERT_UUID: 'CERT_UUID',
|
|
HASH_METHOD: 'HASH_METHOD',
|
|
SIGNATURE: 'SIGNATURE',
|
|
KEY_TYPE: 'SIG_KEY_TYPE'}
|
|
self.assertTrue(signature_utils.should_create_verifier(image_props))
|
|
|
|
def test_should_create_verifier_fail(self):
|
|
bad_image_properties = [{CERT_UUID: 'CERT_UUID',
|
|
HASH_METHOD: 'HASH_METHOD',
|
|
SIGNATURE: 'SIGNATURE'},
|
|
{CERT_UUID: 'CERT_UUID',
|
|
HASH_METHOD: 'HASH_METHOD',
|
|
KEY_TYPE: 'SIG_KEY_TYPE'},
|
|
{CERT_UUID: 'CERT_UUID',
|
|
SIGNATURE: 'SIGNATURE',
|
|
KEY_TYPE: 'SIG_KEY_TYPE'},
|
|
{HASH_METHOD: 'HASH_METHOD',
|
|
SIGNATURE: 'SIGNATURE',
|
|
KEY_TYPE: 'SIG_KEY_TYPE'}]
|
|
|
|
for bad_props in bad_image_properties:
|
|
result = signature_utils.should_create_verifier(bad_props)
|
|
self.assertFalse(result)
|
|
|
|
@mock.patch('cursive.signature_utils.get_public_key')
|
|
def test_verify_signature_PSS(self, mock_get_pub_key):
|
|
data = b'224626ae19824466f2a7f39ab7b80f7f'
|
|
mock_get_pub_key.return_value = TEST_RSA_PRIVATE_KEY.public_key()
|
|
for hash_name, hash_alg in signature_utils.HASH_METHODS.items():
|
|
signer = TEST_RSA_PRIVATE_KEY.signer(
|
|
padding.PSS(
|
|
mgf=padding.MGF1(hash_alg),
|
|
salt_length=padding.PSS.MAX_LENGTH
|
|
),
|
|
hash_alg
|
|
)
|
|
signer.update(data)
|
|
signature = base64.b64encode(signer.finalize())
|
|
img_sig_cert_uuid = 'fea14bc2-d75f-4ba5-bccc-b5c924ad0693'
|
|
verifier = signature_utils.get_verifier(None, img_sig_cert_uuid,
|
|
hash_name, signature,
|
|
signature_utils.RSA_PSS)
|
|
verifier.update(data)
|
|
verifier.verify()
|
|
|
|
@mock.patch('cursive.signature_utils.get_public_key')
|
|
def test_verify_signature_ECC(self, mock_get_pub_key):
|
|
data = b'224626ae19824466f2a7f39ab7b80f7f'
|
|
# test every ECC curve
|
|
for curve in signature_utils.ECC_CURVES:
|
|
key_type_name = 'ECC_' + curve.name.upper()
|
|
try:
|
|
signature_utils.SignatureKeyType.lookup(key_type_name)
|
|
except exception.SignatureVerificationError:
|
|
import warnings
|
|
warnings.warn("ECC curve '%s' not supported" % curve.name)
|
|
continue
|
|
|
|
# Create a private key to use
|
|
private_key = ec.generate_private_key(curve,
|
|
default_backend())
|
|
mock_get_pub_key.return_value = private_key.public_key()
|
|
for hash_name, hash_alg in signature_utils.HASH_METHODS.items():
|
|
signer = private_key.signer(
|
|
ec.ECDSA(hash_alg)
|
|
)
|
|
signer.update(data)
|
|
signature = base64.b64encode(signer.finalize())
|
|
img_sig_cert_uuid = 'fea14bc2-d75f-4ba5-bccc-b5c924ad0693'
|
|
verifier = signature_utils.get_verifier(None,
|
|
img_sig_cert_uuid,
|
|
hash_name, signature,
|
|
key_type_name)
|
|
verifier.update(data)
|
|
verifier.verify()
|
|
|
|
@mock.patch('cursive.signature_utils.get_public_key')
|
|
def test_verify_signature_DSA(self, mock_get_pub_key):
|
|
data = b'224626ae19824466f2a7f39ab7b80f7f'
|
|
mock_get_pub_key.return_value = TEST_DSA_PRIVATE_KEY.public_key()
|
|
for hash_name, hash_alg in signature_utils.HASH_METHODS.items():
|
|
signer = TEST_DSA_PRIVATE_KEY.signer(
|
|
hash_alg
|
|
)
|
|
signer.update(data)
|
|
signature = base64.b64encode(signer.finalize())
|
|
img_sig_cert_uuid = 'fea14bc2-d75f-4ba5-bccc-b5c924ad0693'
|
|
verifier = signature_utils.get_verifier(None, img_sig_cert_uuid,
|
|
hash_name, signature,
|
|
signature_utils.DSA)
|
|
verifier.update(data)
|
|
verifier.verify()
|
|
|
|
@mock.patch('cursive.signature_utils.get_public_key')
|
|
def test_verify_signature_bad_signature(self, mock_get_pub_key):
|
|
data = b'224626ae19824466f2a7f39ab7b80f7f'
|
|
mock_get_pub_key.return_value = TEST_RSA_PRIVATE_KEY.public_key()
|
|
img_sig_cert_uuid = 'fea14bc2-d75f-4ba5-bccc-b5c924ad0693'
|
|
verifier = signature_utils.get_verifier(None, img_sig_cert_uuid,
|
|
'SHA-256', 'BLAH',
|
|
signature_utils.RSA_PSS)
|
|
verifier.update(data)
|
|
self.assertRaises(crypto_exceptions.InvalidSignature,
|
|
verifier.verify)
|
|
|
|
def test_get_verifier_invalid_image_props(self):
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Required image properties for signature'
|
|
' verification do not exist. Cannot verify'
|
|
' signature. Missing property: .*',
|
|
signature_utils.get_verifier,
|
|
None, None, 'SHA-256', 'BLAH',
|
|
signature_utils.RSA_PSS)
|
|
|
|
@mock.patch('cursive.signature_utils.get_public_key')
|
|
def test_verify_signature_bad_sig_key_type(self, mock_get_pub_key):
|
|
mock_get_pub_key.return_value = TEST_RSA_PRIVATE_KEY.public_key()
|
|
img_sig_cert_uuid = 'fea14bc2-d75f-4ba5-bccc-b5c924ad0693'
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Invalid signature key type: .*',
|
|
signature_utils.get_verifier,
|
|
None, img_sig_cert_uuid, 'SHA-256',
|
|
'BLAH', 'BLAH')
|
|
|
|
@mock.patch('cursive.signature_utils.get_public_key')
|
|
def test_get_verifier_none(self, mock_get_pub_key):
|
|
mock_get_pub_key.return_value = BadPublicKey()
|
|
img_sig_cert_uuid = 'fea14bc2-d75f-4ba5-bccc-b5c924ad0693'
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Error occurred while creating'
|
|
' the verifier',
|
|
signature_utils.get_verifier,
|
|
None, img_sig_cert_uuid, 'SHA-256',
|
|
'BLAH', signature_utils.RSA_PSS)
|
|
|
|
def test_get_signature(self):
|
|
signature = b'A' * 256
|
|
data = base64.b64encode(signature)
|
|
self.assertEqual(signature,
|
|
signature_utils.get_signature(data))
|
|
|
|
def test_get_signature_fail(self):
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'The signature data was not properly'
|
|
' encoded using base64',
|
|
signature_utils.get_signature, '///')
|
|
|
|
def test_get_hash_method(self):
|
|
hash_dict = signature_utils.HASH_METHODS
|
|
for hash_name in hash_dict.keys():
|
|
hash_class = signature_utils.get_hash_method(hash_name).__class__
|
|
self.assertIsInstance(hash_dict[hash_name], hash_class)
|
|
|
|
def test_get_hash_method_fail(self):
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Invalid signature hash method: .*',
|
|
signature_utils.get_hash_method, 'SHA-2')
|
|
|
|
def test_signature_key_type_lookup(self):
|
|
for sig_format in [signature_utils.RSA_PSS, signature_utils.DSA]:
|
|
sig_key_type = signature_utils.SignatureKeyType.lookup(sig_format)
|
|
self.assertIsInstance(sig_key_type,
|
|
signature_utils.SignatureKeyType)
|
|
self.assertEqual(sig_format, sig_key_type.name)
|
|
|
|
def test_signature_key_type_lookup_fail(self):
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Invalid signature key type: .*',
|
|
signature_utils.SignatureKeyType.lookup,
|
|
'RSB-PSS')
|
|
|
|
@mock.patch('cursive.signature_utils.get_certificate')
|
|
@mock.patch('cursive.certificate_utils.verify_certificate')
|
|
def test_get_public_key_rsa(self, mock_verify_cert, mock_get_cert):
|
|
fake_cert = FakeCryptoCertificate()
|
|
mock_get_cert.return_value = fake_cert
|
|
sig_key_type = signature_utils.SignatureKeyType.lookup(
|
|
signature_utils.RSA_PSS
|
|
)
|
|
result_pub_key = signature_utils.get_public_key(None, None,
|
|
sig_key_type)
|
|
self.assertEqual(fake_cert.public_key(), result_pub_key)
|
|
|
|
@mock.patch('cursive.signature_utils.get_certificate')
|
|
@mock.patch('cursive.certificate_utils.verify_certificate')
|
|
def test_get_public_key_ecc(self, mock_verify_cert, mock_get_cert):
|
|
fake_cert = FakeCryptoCertificate(TEST_ECC_PRIVATE_KEY.public_key())
|
|
mock_get_cert.return_value = fake_cert
|
|
sig_key_type = signature_utils.SignatureKeyType.lookup('ECC_SECP521R1')
|
|
result_pub_key = signature_utils.get_public_key(None, None,
|
|
sig_key_type)
|
|
self.assertEqual(fake_cert.public_key(), result_pub_key)
|
|
|
|
@mock.patch('cursive.signature_utils.get_certificate')
|
|
@mock.patch('cursive.certificate_utils.verify_certificate')
|
|
def test_get_public_key_dsa(self, mock_verify_cert, mock_get_cert):
|
|
fake_cert = FakeCryptoCertificate(TEST_DSA_PRIVATE_KEY.public_key())
|
|
mock_get_cert.return_value = fake_cert
|
|
sig_key_type = signature_utils.SignatureKeyType.lookup(
|
|
signature_utils.DSA
|
|
)
|
|
result_pub_key = signature_utils.get_public_key(None, None,
|
|
sig_key_type)
|
|
self.assertEqual(fake_cert.public_key(), result_pub_key)
|
|
|
|
@mock.patch('cursive.signature_utils.get_certificate')
|
|
@mock.patch('cursive.certificate_utils.verify_certificate')
|
|
def test_get_public_key_invalid_key(self, mock_verify_certificate,
|
|
mock_get_certificate):
|
|
bad_pub_key = 'A' * 256
|
|
mock_get_certificate.return_value = FakeCryptoCertificate(bad_pub_key)
|
|
sig_key_type = signature_utils.SignatureKeyType.lookup(
|
|
signature_utils.RSA_PSS
|
|
)
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Invalid public key type for '
|
|
'signature key type: .*',
|
|
signature_utils.get_public_key, None,
|
|
None, sig_key_type)
|
|
|
|
@mock.patch('cryptography.x509.load_der_x509_certificate')
|
|
@mock.patch('castellan.key_manager.API', return_value=FakeKeyManager())
|
|
def test_get_certificate(self, mock_key_manager_API, mock_load_cert):
|
|
cert_uuid = 'valid_format_cert'
|
|
x509_cert = FakeCryptoCertificate()
|
|
mock_load_cert.return_value = x509_cert
|
|
self.assertEqual(x509_cert,
|
|
signature_utils.get_certificate(None, cert_uuid))
|
|
|
|
@mock.patch('castellan.key_manager.API', return_value=FakeKeyManager())
|
|
def test_get_certificate_key_manager_fail(self, mock_key_manager_API):
|
|
bad_cert_uuid = 'fea14bc2-d75f-4ba5-bccc-b5c924ad0695'
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Unable to retrieve certificate with ID: .*',
|
|
signature_utils.get_certificate, None,
|
|
bad_cert_uuid)
|
|
|
|
@mock.patch('castellan.key_manager.API', return_value=FakeKeyManager())
|
|
def test_get_certificate_invalid_format(self, mock_API):
|
|
cert_uuid = 'invalid_format_cert'
|
|
self.assertRaisesRegex(exception.SignatureVerificationError,
|
|
'Invalid certificate format: .*',
|
|
signature_utils.get_certificate, None,
|
|
cert_uuid)
|