def test_big_negative_numbers(self, value: int) -> None:
encoder = asn1.Encoder()
encoder.write(value, asn1.Number.Integer)
encoded_bytes = encoder.output()
decoder = asn1.Decoder(encoded_bytes)
tag, val = decoder.read()
assert val == value
def test_integer(self, buf: bytes, result: int) -> None:
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (asn1.Number.Integer, asn1.Type.Primitive, asn1.Class.Universal)
tag, val = dec.read()
assert isinstance(val, int)
assert val == result
def test_time_ticks(self) -> None:
buf = b"\x43\x03\x54\xa5\xb0"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (3, asn1.Type.Primitive, asn1.Class.Application)
tag, val = dec.read()
assert val == 5547440
def test_no_such_instance(self) -> None:
buf = b"\x81\x00"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (1, asn1.Type.Primitive, asn1.Class.Context)
tag, val = dec.read()
assert val is None
def test_end_of_mib_view(self) -> None:
buf = b"\x82\x00"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (2, asn1.Type.Primitive, asn1.Class.Context)
tag, val = dec.read()
assert val is None
def test_ipaddress(self) -> None:
buf = b"\x40\x04\x7f\x00\x00\x01"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (0, asn1.Type.Primitive, asn1.Class.Application)
tag, val = dec.read()
assert val == ipaddress.IPv4Address("127.0.0.1")
def test_counter32(self) -> None:
buf = b"\x41\x01\x2a"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (1, asn1.Type.Primitive, asn1.Class.Application)
tag, val = dec.read()
assert val == 42
def test_null(self) -> None:
buf = b"\x05\x00"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (asn1.Number.Null, asn1.Type.Primitive, asn1.Class.Universal)
tag, val = dec.read()
assert val is None
def test_skip_primitive(self) -> None:
buf = b"\x02\x01\x01\x02\x01\x02"
dec = asn1.Decoder(buf)
dec.read()
tag, val = dec.read()
assert val == 2
assert dec.eof()
def test_skip_constructed(self) -> None:
buf = b"\x30\x06\x02\x01\x01\x02\x01\x02\x02\x01\x03"
dec = asn1.Decoder(buf)
dec.read()
tag, val = dec.read()
assert val == 3
assert dec.eof()
def test_gauge32(self) -> None:
buf = b"\x42\x01\x02"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (2, asn1.Type.Primitive, asn1.Class.Application)
tag, val = dec.read()
assert val == 2
def test_private(self) -> None:
buf = b"\xe1\x03\x02\x01\x01"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (1, asn1.Type.Constructed, asn1.Class.Private)
with dec.enter():
tag, val = dec.read()
assert val == 1
def test_application(self) -> None:
buf = b"\x61\x03\x02\x01\x01"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (1, asn1.Type.Constructed, asn1.Class.Application)
with dec.enter():
tag, val = dec.read()
assert val == 1
def test_read_multiple(self) -> None:
buf = b"\x02\x01\x01\x02\x01\x02"
dec = asn1.Decoder(buf)
tag, val = dec.read()
assert val == 1
tag, val = dec.read()
assert val == 2
assert dec.eof()
def test_long_tag_id(self) -> None:
buf = b"\x3f\x83\xff\x7f\x03\x02\x01\x01"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (0xFFFF, asn1.Type.Constructed, asn1.Class.Universal)
with dec.enter():
tag, val = dec.read()
assert val == 1
def test_big_negative_integer(self) -> None:
buf = (
b"\x02\x10\xff\x7f\x2b\x3a\x4d\xea\x48\x1e\x1f\x37\x7b\xa8\xbd\x7f\xb0\x16"
)
dec = asn1.Decoder(buf)
tag, val = dec.read()
assert val == -668929531791034950848739021124816874
assert dec.eof()
def test_set_of(self) -> None:
buf = b"\x31\x06\x02\x01\x01\x02\x01\x02"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (asn1.Number.Set, asn1.Type.Constructed, asn1.Class.Universal)
with dec.enter():
tag, val = dec.read()
assert val == 1
tag, val = dec.read()
assert val == 2
def test_octet_string(self) -> None:
buf = b"\x04\x03foo"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (
asn1.Number.OctetString,
asn1.Type.Primitive,
asn1.Class.Universal,
)
tag, val = dec.read()
assert val == b"foo"
def test_unicode_printable_string(self) -> None:
buf = b"\x13\x05\x66\x6f\x6f\xc3\xa9"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (
asn1.Number.PrintableString,
asn1.Type.Primitive,
asn1.Class.Universal,
)
tag, val = dec.read()
assert val == "fooé"
def test_object_identifier(self) -> None:
buf = b"\x06\x02\x2a\x03"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (
asn1.Number.ObjectIdentifier,
asn1.Type.Primitive,
asn1.Class.Universal,
)
tag, val = dec.read()
assert val == ".1.2.3"
def test_enumerated(self) -> None:
buf = b"\x0a\x01\x01"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (
asn1.Number.Enumerated,
asn1.Type.Primitive,
asn1.Class.Universal,
)
tag, val = dec.read()
assert isinstance(val, int)
assert val == 1
def test_sequence(self) -> None:
buf = b"\x30\x08\x02\x01\x01\x04\x03foo"
dec = asn1.Decoder(buf)
tag = dec.peek()
assert tag == (
asn1.Number.Sequence,
asn1.Type.Constructed,
asn1.Class.Universal,
)
with dec.enter():
tag, val = dec.read()
assert val == 1
tag, val = dec.read()
assert val == b"foo"
def test_no_input(self) -> None:
dec = asn1.Decoder(b"")
with pytest.raises(asn1.Error):
dec.peek()
def test_error_non_normalised_object_identifier(self) -> None:
buf = b"\x06\x02\x80\x01"
dec = asn1.Decoder(buf)
with pytest.raises(asn1.Error):
dec.read()
def test_error_object_identifier_with_too_large_first_component(
self) -> None:
buf = b"\x06\x02\x8c\x40"
dec = asn1.Decoder(buf)
with pytest.raises(asn1.Error):
dec.read()
def test_error_missing_value_bytes(self) -> None:
buf = b"\x02\x02\x01"
dec = asn1.Decoder(buf)
with pytest.raises(asn1.Error):
dec.read()
def test_error_too_many_length_bytes(self) -> None:
buf = b"\x04\xff" + b"\xff" * 0x7F
dec = asn1.Decoder(buf)
with pytest.raises(asn1.Error):
dec.read()
def test_error_missing_length_bytes(self) -> None:
buf = b"\x04\x82\xff"
dec = asn1.Decoder(buf)
with pytest.raises(asn1.Error):
dec.read()
def test_error_no_length_bytes(self) -> None:
buf = b"\x02"
dec = asn1.Decoder(buf)
with pytest.raises(asn1.Error):
dec.read()
def test_error_missing_tag_bytes(self, buf: bytes) -> None:
dec = asn1.Decoder(buf)
with pytest.raises(asn1.Error):
dec.peek()
