blob: 5e6253ce143298482994821f74a511c9b10c5467 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import absolute_import, division, print_function
import binascii
import pytest
from cryptography.hazmat.backends.interfaces import DHBackend
from cryptography.hazmat.primitives.asymmetric.x25519 import (
X25519PrivateKey, X25519PublicKey
)
@pytest.mark.supported(
only_if=lambda backend: backend.x25519_supported(),
skip_message="Requires OpenSSL with X25519 support"
)
@pytest.mark.requires_backend_interface(interface=DHBackend)
@pytest.mark.wycheproof_tests("x25519_test.json")
def test_x25519(backend, wycheproof):
assert list(wycheproof.testgroup.items()) == [("curve", "curve25519")]
private_key = X25519PrivateKey._from_private_bytes(
binascii.unhexlify(wycheproof.testcase["private"])
)
public_key = X25519PublicKey.from_public_bytes(
binascii.unhexlify(wycheproof.testcase["public"])
)
assert wycheproof.valid or wycheproof.acceptable
expected = binascii.unhexlify(wycheproof.testcase["shared"])
if expected == b"\x00" * 32:
assert wycheproof.acceptable
# OpenSSL returns an error on all zeros shared key
with pytest.raises(ValueError):
private_key.exchange(public_key)
else:
assert private_key.exchange(public_key) == expected
|
