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# 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.
import pytest
import cryptography.hazmat.asn1 as asn1
class TestEncodeInteger:
@pytest.mark.parametrize(
"value,expected",
[
(0, b"\x02\x01\x00"),
(1, b"\x02\x01\x01"),
(42, b"\x02\x01\x2a"),
(127, b"\x02\x01\x7f"),
(128, b"\x02\x02\x00\x80"),
(255, b"\x02\x02\x00\xff"),
(256, b"\x02\x02\x01\x00"),
(-1, b"\x02\x01\xff"),
(-128, b"\x02\x01\x80"),
(-129, b"\x02\x02\xff\x7f"),
],
)
def test_encode_int(self, value: int, expected: bytes) -> None:
encoded = asn1.encode_der(value)
assert encoded == expected, (
f"Failed for {value}: got {encoded.hex()}, expected"
f"{expected.hex()}"
)
class TestEncodeSequence:
def test_encode_ok_sequence_single_field(self) -> None:
@asn1.sequence
class Example:
foo: int
value = Example(foo=9)
encoded = asn1.encode_der(value)
assert encoded == b"\x30\x03\x02\x01\x09"
def test_encode_ok_sequence_multiple_fields(self) -> None:
@asn1.sequence
class Example:
foo: int
bar: int
value = Example(foo=9, bar=6)
encoded = asn1.encode_der(value)
assert encoded == b"\x30\x06\x02\x01\x09\x02\x01\x06"
def test_encode_ok_nested_sequence(self) -> None:
@asn1.sequence
class Child:
foo: int
@asn1.sequence
class Parent:
foo: Child
value = Parent(foo=Child(foo=9))
encoded = asn1.encode_der(value)
assert encoded == b"\x30\x05\x30\x03\x02\x01\x09"
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