def __init__(self, security_policy):
self._sequence_number = 0
self._peer_sequence_number = None
self._incoming_parts = []
self._security_policy = security_policy
self._policies = []
self.channel = auto.OpenSecureChannelResult()
self._old_tokens = []
self._open = False
self._max_chunk_size = 65536
def open(self, params, server):
"""
called on server side to open secure channel
"""
if not self._open or params.RequestType == auto.SecurityTokenRequestType.Issue:
self._open = True
self.channel = auto.OpenSecureChannelResult()
self.channel.SecurityToken.TokenId = 13 # random value
self.channel.SecurityToken.ChannelId = server.get_new_channel_id()
self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
else:
self._old_tokens.append(self.channel.SecurityToken.TokenId)
self.channel.SecurityToken.TokenId += 1
self.channel.SecurityToken.CreatedAt = datetime.utcnow()
self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
self.channel.ServerNonce = utils.create_nonce(
self._security_policy.symmetric_key_size)
self._security_policy.make_symmetric_key(self.channel.ServerNonce,
params.ClientNonce)
return self.channel