Add retro-compatibility for Python 2.7 (#1198)

* add retro-compatibility for Python 2.7

src/backend_pool/ssh_exec.py

@@ -2,20 +2,21 @@ from twisted.conch.ssh import channel, common, connection, transport, userauth
 from twisted.internet import defer, protocol, reactor
 
 
-class PasswordAuth(userauth.SSHUserAuthClient):
+# object is added for Python 2.7 compatibility (#1198) - as is super with args
+class PasswordAuth(userauth.SSHUserAuthClient, object):
     def __init__(self, user, password, conn):
-        super().__init__(user, conn)
+        super(PasswordAuth, self).__init__(user, conn)
         self.password = password
 
     def getPassword(self, prompt=None):
         return defer.succeed(self.password)
 
 
-class CommandChannel(channel.SSHChannel):
+class CommandChannel(channel.SSHChannel, object):
     name = 'session'
 
     def __init__(self, command, done_deferred, callback, *args, **kwargs):
-        super().__init__(*args, **kwargs)
+        super(CommandChannel, self).__init__(*args, **kwargs)
         self.command = command
         self.done_deferred = done_deferred
         self.callback = callback
@@ -40,9 +41,9 @@ class CommandChannel(channel.SSHChannel):
             self.callback(self.data)
 
 
-class ClientConnection(connection.SSHConnection):
+class ClientConnection(connection.SSHConnection, object):
     def __init__(self, cmd, done_deferred, callback):
-        super().__init__()
+        super(ClientConnection, self).__init__()
         self.command = cmd
         self.done_deferred = done_deferred
         self.callback = callback

src/cowrie/ssh/factory.py

@@ -24,7 +24,8 @@ from cowrie.ssh_proxy import server_transport as proxyTransport
 from cowrie.ssh_proxy.userauth import ProxySSHAuthServer
 
 
-class CowrieSSHFactory(factory.SSHFactory):
+# object is added for Python 2.7 compatibility (#1198) - as is super with args
+class CowrieSSHFactory(factory.SSHFactory, object):
     """
     This factory creates HoneyPotSSHTransport instances
     They listen directly to the TCP port
@@ -48,7 +49,7 @@ class CowrieSSHFactory(factory.SSHFactory):
             b'ssh-userauth': ProxySSHAuthServer if self.backend == 'proxy' else HoneyPotSSHUserAuthServer,
             b'ssh-connection': connection.CowrieSSHConnection,
         }
-        super().__init__()
+        super(CowrieSSHFactory, self).__init__()
 
     def logDispatch(self, *msg, **args):
         """

src/cowrie/ssh_proxy/userauth.py

@@ -8,9 +8,10 @@ from twisted.conch.ssh.common import getNS
 from cowrie.ssh import userauth
 
 
-class ProxySSHAuthServer(userauth.HoneyPotSSHUserAuthServer):
+# object is added for Python 2.7 compatibility (#1198) - as is super with args
+class ProxySSHAuthServer(userauth.HoneyPotSSHUserAuthServer, object):
     def __init__(self):
-        super().__init__()
+        super(ProxySSHAuthServer, self).__init__()
         self.triedPassword = None
 
     def auth_password(self, packet):
@@ -19,7 +20,7 @@ class ProxySSHAuthServer(userauth.HoneyPotSSHUserAuthServer):
         """
         self.triedPassword = getNS(packet[1:])[0]
 
-        return super().auth_password(packet)
+        return super(ProxySSHAuthServer, self).auth_password(packet)
 
     def _cbFinishedAuth(self, result):
         """

src/cowrie/telnet/factory.py

@@ -19,7 +19,8 @@ from cowrie.telnet.userauth import HoneyPotTelnetAuthProtocol
 from cowrie.telnet_proxy.server_transport import FrontendTelnetTransport
 
 
-class HoneyPotTelnetFactory(protocol.ServerFactory):
+# object is added for Python 2.7 compatibility (#1198) - as is super with args
+class HoneyPotTelnetFactory(protocol.ServerFactory, object):
     """
     This factory creates HoneyPotTelnetAuthProtocol instances
     They listen directly to the TCP port
@@ -32,7 +33,7 @@ class HoneyPotTelnetFactory(protocol.ServerFactory):
     def __init__(self, backend, pool_handler):
         self.backend = backend
         self.pool_handler = pool_handler
-        super().__init__()
+        super(HoneyPotTelnetFactory, self).__init__()
 
     # TODO logging clarity can be improved: see what SSH does
     def logDispatch(self, *msg, **args):

src/cowrie/telnet_proxy/client_transport.py

@@ -7,7 +7,8 @@ from twisted.protocols.policies import TimeoutMixin
 from twisted.python import log
 
 
-class BackendTelnetTransport(TelnetTransport, TimeoutMixin):
+# object is added for Python 2.7 compatibility (#1198) - as is super with args
+class BackendTelnetTransport(TelnetTransport, TimeoutMixin, object):
     def __init__(self):
         # self.delayedPacketsToFrontend = []
         self.backendConnected = False
@@ -26,7 +27,7 @@ class BackendTelnetTransport(TelnetTransport, TimeoutMixin):
             self.transport.write(packet)
         self.factory.server.delayedPacketsToBackend = []
 
-        super().connectionMade()
+        super(TelnetTransport, self).connectionMade()
         # TODO timeout if no backend available
 
     def connectionLost(self, reason):

src/cowrie/telnet_proxy/server_transport.py

@@ -21,9 +21,10 @@ from cowrie.telnet_proxy import client_transport
 from cowrie.telnet_proxy.handler import TelnetHandler
 
 
-class FrontendTelnetTransport(TelnetTransport, TimeoutMixin):
+# object is added for Python 2.7 compatibility (#1198) - as is super with args
+class FrontendTelnetTransport(TelnetTransport, TimeoutMixin, object):
     def __init__(self):
-        super().__init__()
+        super(FrontendTelnetTransport, self).__init__()
 
         self.peer_ip = None
         self.peer_port = 0