def test_parse_server_hello_extensions(self):
"""
:func:`parse_server_hello` fails to parse when
SIGNATURE_ALGORITHMS extension bytes are present in the packet
"""
with pytest.raises(UnsupportedExtensionException):
ServerHello.from_bytes(self.extensions_packet)
def test_parse_server_hello_extensions(self):
"""
:func:`parse_server_hello` fails to parse when
SIGNATURE_ALGORITHMS extension bytes are present in the packet
"""
with pytest.raises(UnsupportedExtensionException):
ServerHello.from_bytes(self.extensions_packet)
def test_server_hello_fails_with_server_name_extension(self):
"""
:py:func:`tls.hello_message.ServerHello` does not parse a packet
with a server_name extension, and raises an error.
"""
server_name_extension_data = (
b'\x00\x00' # Extension Type: Server Name
b'\x00\x0e' # Length
b'\x00\x0c' # Server Name Indication Length
b'\x00' # Server Name Type: host_name
b'\x00\x09' # Length of hostname data
b'localhost')
server_hello_packet = self.common_server_hello_data + (
b'\x00\x12') + server_name_extension_data
with pytest.raises(UnsupportedExtensionException):
ServerHello.from_bytes(server_hello_packet)
def test_parse_server_hello_extensions(self):
"""
:func:`parse_server_hello` returns an instance of
:class:`ServerHello`.
"""
record = ServerHello.from_bytes(self.extensions_packet)
assert len(record.extensions) == 1
assert record.extensions[0].type == ExtensionType.SIGNATURE_ALGORITHMS
assert record.extensions[0].data == b'abcd'
def test_parse_server_hello_extensions(self):
"""
:func:`parse_server_hello` returns an instance of
:class:`ServerHello`.
"""
record = ServerHello.from_bytes(self.extensions_packet)
assert len(record.extensions) == 1
assert record.extensions[0].type == ExtensionType.SIGNATURE_ALGORITHMS
assert record.extensions[0].data == b'abcd'
def test_from_bytes_with_truncated_hmac_extension(self):
"""
:py:func:`tls.hello_message.ServerHello` parses a packet with a
truncated_hmac extension.
"""
record = ServerHello.from_bytes(
self.server_hello_with_truncated_hmac_ext)
assert len(record.extensions) == 1
assert record.extensions[0].type == enums.ExtensionType.TRUNCATED_HMAC
assert record.extensions[0].data == Container()
def test_from_bytes_with_truncated_hmac_extension(self):
"""
:py:func:`tls.hello_message.ServerHello` parses a packet with a
truncated_hmac extension.
"""
record = ServerHello.from_bytes(
self.server_hello_with_truncated_hmac_ext
)
assert len(record.extensions) == 1
assert record.extensions[0].type == enums.ExtensionType.TRUNCATED_HMAC
assert record.extensions[0].data == Container()
def test_server_hello_fails_with_server_name_extension(self):
"""
:py:func:`tls.hello_message.ServerHello` does not parse a packet
with a server_name extension, and raises an error.
"""
server_name_extension_data = (
b'\x00\x00' # Extension Type: Server Name
b'\x00\x0e' # Length
b'\x00\x0c' # Server Name Indication Length
b'\x00' # Server Name Type: host_name
b'\x00\x09' # Length of hostname data
b'localhost'
)
server_hello_packet = self.common_server_hello_data + (
b'\x00\x12'
) + server_name_extension_data
with pytest.raises(UnsupportedExtensionException):
ServerHello.from_bytes(
server_hello_packet
)
def test_parse_server_hello(self):
"""
:func:`parse_server_hello` returns an instance of
:class:`ServerHello`.
"""
record = ServerHello.from_bytes(self.no_extensions_packet)
assert isinstance(record, ServerHello)
assert record.server_version.major == 3
assert record.server_version.minor == 0
assert record.random.gmt_unix_time == 16909060
assert record.random.random_bytes == b'0123456789012345678901234567'
assert record.session_id == b'01234567890123456789012345678901'
assert record.cipher_suite == b'\x00\x6B'
assert record.compression_method == enums.CompressionMethod.NULL
assert len(record.extensions) == 0
def test_parse_server_hello(self):
"""
:func:`parse_server_hello` returns an instance of
:class:`ServerHello`.
"""
record = ServerHello.from_bytes(self.no_extensions_packet)
assert isinstance(record, ServerHello)
assert record.server_version.major == 3
assert record.server_version.minor == 0
assert record.random.gmt_unix_time == 16909060
assert record.random.random_bytes == b'0123456789012345678901234567'
assert record.session_id == b'01234567890123456789012345678901'
assert record.cipher_suite == b'\x00\x6B'
assert record.compression_method == enums.CompressionMethod.NULL
assert len(record.extensions) == 0
def test_as_bytes_unsupported_extension(self):
"""
:func:`ServerHello.as_bytes` fails to serialize a message that
contains invalid extensions
"""
extensions_data = (
b'\x00\x12'
b'\x00\x00' # Extension Type: Server Name
b'\x00\x0e' # Length
b'\x00\x0c' # Server Name Indication Length
b'\x00' # Server Name Type: host_name
b'\x00\x09' # Length of hostname data
b'localhost')
record = ServerHello.from_bytes(self.no_extensions_packet)
extensions = _constructs.Extensions.parse(extensions_data)
record.extensions = extensions
with pytest.raises(UnsupportedExtensionException):
record.as_bytes()
def test_as_bytes_unsupported_extension(self):
"""
:func:`ServerHello.as_bytes` fails to serialize a message that
contains invalid extensions
"""
extensions_data = (
b'\x00\x12'
b'\x00\x00' # Extension Type: Server Name
b'\x00\x0e' # Length
b'\x00\x0c' # Server Name Indication Length
b'\x00' # Server Name Type: host_name
b'\x00\x09' # Length of hostname data
b'localhost'
)
record = ServerHello.from_bytes(self.no_extensions_packet)
extensions = _constructs.Extensions.parse(extensions_data)
record.extensions = extensions
with pytest.raises(UnsupportedExtensionException):
record.as_bytes()
def test_as_bytes_with_truncated_hmac_extension(self):
record = ServerHello.from_bytes(
self.server_hello_with_truncated_hmac_ext)
assert record.as_bytes() == self.server_hello_with_truncated_hmac_ext
def test_as_bytes_no_extensions(self):
"""
:func:`ServerHello.as_bytes` returns the bytes it was created with
"""
record = ServerHello.from_bytes(self.no_extensions_packet)
assert record.as_bytes() == self.no_extensions_packet
def test_as_bytes_with_truncated_hmac_extension(self):
record = ServerHello.from_bytes(
self.server_hello_with_truncated_hmac_ext
)
assert record.as_bytes() == self.server_hello_with_truncated_hmac_ext
def test_as_bytes_no_extensions(self):
"""
:func:`ServerHello.as_bytes` returns the bytes it was created with
"""
record = ServerHello.from_bytes(self.no_extensions_packet)
assert record.as_bytes() == self.no_extensions_packet