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# Copyright 2016-2018 Yubico AB
#
# 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.
from yubihsm.defs import COMMAND, CAPABILITY, ERROR
from yubihsm.objects import AuthenticationKey
from yubihsm.exceptions import YubiHsmAuthenticationError, YubiHsmDeviceError
from yubihsm.utils import password_to_key
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.asymmetric import ec
from binascii import a2b_hex
import pytest
import os
class TestAuthenticationKey:
def test_put_unicode_authkey(self, hsm, session):
# UTF-8 encoded unicode password
password = b"\xf0\x9f\x98\x81\xf0\x9f\x98\x83\xf0\x9f\x98\x84".decode()
authkey = AuthenticationKey.put_derived(
session,
0,
"Test PUT authkey",
1,
CAPABILITY.NONE,
CAPABILITY.NONE,
password,
)
with hsm.create_session_derived(authkey.id, password) as session:
message = os.urandom(256)
resp = session.send_secure_cmd(COMMAND.ECHO, message)
assert resp == message
authkey.delete()
class TestChangeAuthenticationKey:
@pytest.fixture(autouse=True)
def prerequisites(self, info):
if info.version < (2, 1, 0):
pytest.skip("Change authentication key requires 2.1.0")
def test_change_password(self, hsm, session):
# Create an auth key with the capability to change
authkey = AuthenticationKey.put_derived(
session,
0,
"Test CHANGE authkey",
1,
CAPABILITY.CHANGE_AUTHENTICATION_KEY,
CAPABILITY.NONE,
"first_password",
)
# Can't change the password of another key
with pytest.raises(YubiHsmDeviceError) as context:
authkey.change_password("second_password")
assert context.value.code == ERROR.INVALID_ID
# Try again, using the new auth key
with hsm.create_session_derived(authkey.id, "first_password") as session:
authkey.with_session(session).change_password("second_password")
with pytest.raises(YubiHsmAuthenticationError):
hsm.create_session_derived(authkey.id, "first_password")
hsm.create_session_derived(authkey.id, "second_password").close()
authkey.delete()
with pytest.raises(YubiHsmDeviceError) as context:
hsm.create_session_derived(authkey.id, "second_password")
assert context.value.code == ERROR.OBJECT_NOT_FOUND
def test_change_raw_keys(self, session, hsm):
key_enc = a2b_hex("090b47dbed595654901dee1cc655e420")
key_mac = a2b_hex("592fd483f759e29909a04c4505d2ce0a")
# Create an auth key with the capability to change
authkey = AuthenticationKey.put(
session,
0,
"Test CHANGE authkey",
1,
CAPABILITY.CHANGE_AUTHENTICATION_KEY,
CAPABILITY.NONE,
key_enc,
key_mac,
)
with hsm.create_session_derived(authkey.id, "password") as session:
key_enc, key_mac = password_to_key("second_password")
authkey.with_session(session).change_key(key_enc, key_mac)
with hsm.create_session_derived(authkey.id, "second_password"):
pass
authkey.delete()
class TestSessions:
def test_parallel_sessions(self, session, hsm):
authkey1 = AuthenticationKey.put_derived(
session,
0,
"Test authkey 1",
1,
CAPABILITY.NONE,
CAPABILITY.NONE,
"one",
)
authkey2 = AuthenticationKey.put_derived(
session,
0,
"Test authkey 2",
2,
CAPABILITY.NONE,
CAPABILITY.NONE,
"two",
)
authkey3 = AuthenticationKey.put_derived(
session,
0,
"Test authkey 3",
1,
CAPABILITY.NONE,
CAPABILITY.NONE,
"three",
)
session1 = hsm.create_session_derived(authkey1.id, "one")
session2 = hsm.create_session_derived(authkey2.id, "two")
session3 = hsm.create_session_derived(authkey3.id, "three")
session2.close()
session1.send_secure_cmd(COMMAND.ECHO, b"hello")
session3.send_secure_cmd(COMMAND.ECHO, b"hi")
session1.send_secure_cmd(COMMAND.ECHO, b"hello")
session3.send_secure_cmd(COMMAND.ECHO, b"greetings")
session1.close()
session3.send_secure_cmd(COMMAND.ECHO, b"good bye")
session3.close()
authkey1.delete()
authkey2.delete()
authkey3.delete()
class TestAymmetricAuthenticationKey:
@pytest.fixture(autouse=True)
def prerequisites(self, info):
if info.version < (2, 3, 0):
pytest.skip("Asymmetric authentication requires 2.3.0")
def test_put_public_key(self, hsm, session):
private_key = ec.generate_private_key(ec.SECP256R1(), backend=default_backend())
authkey = AuthenticationKey.put_public_key(
session,
0,
"Test PUT asym authkey",
1,
CAPABILITY.NONE,
CAPABILITY.NONE,
private_key.public_key(),
)
try:
with hsm.create_session_asymmetric(
authkey.id, private_key
) as asymmetric_session:
message = os.urandom(256)
resp = asymmetric_session.send_secure_cmd(COMMAND.ECHO, message)
assert message == resp
finally:
authkey.delete()
def test_change_public_key(self, hsm, session):
first_private_key = ec.generate_private_key(
ec.SECP256R1(), backend=default_backend()
)
second_private_key = ec.generate_private_key(
ec.SECP256R1(), backend=default_backend()
)
authkey = AuthenticationKey.put_public_key(
session,
0,
"Test PUT asym authkey",
1,
CAPABILITY.CHANGE_AUTHENTICATION_KEY,
CAPABILITY.NONE,
first_private_key.public_key(),
)
with hsm.create_session_asymmetric(
authkey.id, first_private_key
) as asymmetric_session:
authkey.with_session(asymmetric_session).change_public_key(
second_private_key.public_key()
)
try:
with hsm.create_session_asymmetric(
authkey.id, second_private_key
) as asymmetric_session:
message = os.urandom(256)
resp = asymmetric_session.send_secure_cmd(COMMAND.ECHO, message)
assert message == resp
finally:
authkey.delete()
def test_cached_device_public_key(self, hsm, session):
private_key = ec.generate_private_key(ec.SECP256R1(), backend=default_backend())
authkey = AuthenticationKey.put_public_key(
session,
0,
"Test PUT asym authkey",
1,
CAPABILITY.NONE,
CAPABILITY.NONE,
private_key.public_key(),
)
right_public_key = hsm.get_device_public_key()
wrong_public_key = ec.generate_private_key(
ec.SECP256R1(), backend=default_backend()
).public_key()
with pytest.raises(YubiHsmAuthenticationError):
hsm.create_session_asymmetric(authkey.id, private_key, wrong_public_key)
try:
hsm.create_session_asymmetric(authkey.id, private_key, right_public_key)
finally:
authkey.delete()
|
