78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
# 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 pytest
|
|
|
|
from cryptography.hazmat.primitives.asymmetric.utils import (
|
|
Prehashed,
|
|
decode_dss_signature,
|
|
encode_dss_signature,
|
|
)
|
|
|
|
|
|
def test_dss_signature():
|
|
sig = encode_dss_signature(1, 1)
|
|
assert sig == b"0\x06\x02\x01\x01\x02\x01\x01"
|
|
assert decode_dss_signature(sig) == (1, 1)
|
|
|
|
r_s1 = (
|
|
1037234182290683143945502320610861668562885151617,
|
|
559776156650501990899426031439030258256861634312,
|
|
)
|
|
sig2 = encode_dss_signature(*r_s1)
|
|
assert sig2 == (
|
|
b"0-\x02\x15\x00\xb5\xaf0xg\xfb\x8bT9\x00\x13\xccg\x02\r\xdf\x1f,\x0b"
|
|
b'\x81\x02\x14b\r;"\xabP1D\x0c>5\xea\xb6\xf4\x81)\x8f\x9e\x9f\x08'
|
|
)
|
|
assert decode_dss_signature(sig2) == r_s1
|
|
|
|
sig3 = encode_dss_signature(0, 0)
|
|
assert sig3 == b"0\x06\x02\x01\x00\x02\x01\x00"
|
|
assert decode_dss_signature(sig3) == (0, 0)
|
|
|
|
|
|
def test_encode_dss_non_integer():
|
|
with pytest.raises(ValueError):
|
|
encode_dss_signature("h", 3)
|
|
|
|
with pytest.raises(ValueError):
|
|
encode_dss_signature("3", "2")
|
|
|
|
with pytest.raises(ValueError):
|
|
encode_dss_signature(3, "h")
|
|
|
|
with pytest.raises(ValueError):
|
|
encode_dss_signature(3.3, 1.2)
|
|
|
|
with pytest.raises(ValueError):
|
|
encode_dss_signature("hello", "world")
|
|
|
|
|
|
def test_encode_dss_negative():
|
|
with pytest.raises(ValueError):
|
|
encode_dss_signature(-1, 0)
|
|
|
|
|
|
def test_decode_dss_trailing_bytes():
|
|
with pytest.raises(ValueError):
|
|
decode_dss_signature(b"0\x06\x02\x01\x01\x02\x01\x01\x00\x00\x00")
|
|
|
|
|
|
def test_decode_dss_invalid_asn1():
|
|
with pytest.raises(ValueError):
|
|
# This byte sequence has an invalid ASN.1 sequence length as well as
|
|
# an invalid integer length for the second integer.
|
|
decode_dss_signature(b"0\x07\x02\x01\x01\x02\x02\x01")
|
|
|
|
with pytest.raises(ValueError):
|
|
# This is the BER "end-of-contents octets".
|
|
decode_dss_signature(b"\x00\x00")
|
|
|
|
|
|
def test_pass_invalid_prehashed_arg():
|
|
with pytest.raises(TypeError):
|
|
Prehashed(object())
|