nucypher/tests/crypto/test_utils.py

41 lines
1.4 KiB
Python

"""
This file is part of nucypher.
nucypher is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
nucypher 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with nucypher. If not, see <https://www.gnu.org/licenses/>.
"""
import pytest
from umbral.keys import UmbralPrivateKey
from nucypher.crypto.signing import SignatureStamp
from nucypher.crypto.utils import get_coordinates_as_bytes
def test_coordinates_as_bytes():
pubkey = UmbralPrivateKey.gen_key().pubkey
point = pubkey.point_key
stamp = SignatureStamp(verifying_key=pubkey)
x, y = point.to_affine()
x = x.to_bytes(32, 'big')
y = y.to_bytes(32, 'big')
for p in (point, pubkey, stamp):
assert get_coordinates_as_bytes(p) == x + y
assert get_coordinates_as_bytes(p, x_coord=False) == y
assert get_coordinates_as_bytes(p, y_coord=False) == x
with pytest.raises(ValueError):
_ = get_coordinates_as_bytes(p, x_coord=False, y_coord=False)