class TLSInnerPlaintext(_GenericTLSSessionInheritance):
name = "TLS Inner Plaintext"
fields_desc = [
_TLSMsgListField("msg", []),
ByteEnumField("type", None, _tls_type),
XStrField("pad", "")
]
def pre_dissect(self, s):
"""
We need to parse the padding and type as soon as possible,
else we won't be able to parse the message list...
"""
if len(s) < 1:
raise Exception("Invalid InnerPlaintext (too short).")
l = len(s) - 1
if s[-1] != b"\x00":
msg_len = l
else:
n = 1
while s[-n] != b"\x00" and n < l:
n += 1
msg_len = l - n
self.fields_desc[0].length_from = lambda pkt: msg_len
self.type = struct.unpack("B", s[msg_len:msg_len + 1])[0]
return s
class TLSInnerChangeCipherSpec(_GenericTLSSessionInheritance):
__slots__ = ["type"]
name = "TLS Inner Plaintext (CCS)"
fields_desc = [_TLSMsgListField("msg", [], length_from=lambda x: 1)]
def __init__(self, _pkt=None, *args, **kwargs):
self.type = 0x14
super(TLSInnerChangeCipherSpec, self).__init__(_pkt, *args, **kwargs)