#!/usr/bin/env python3
# -*- coding: utf-8 -*-

from impacket.dcerpc.v5 import rrp
from impacket.examples.secretsdump import RemoteOperations
from impacket.dcerpc.v5.rrp import DCERPCSessionError


class NXCModule:
    """
    Detect if the target's LmCompatibilityLevel will allow NTLMv1 authentication
    Module by @Tw1sm
    """

    name = "ntlmv1"
    description = "Detect if lmcompatibilitylevel on the target is set to 0 or 1"
    supported_protocols = ["smb"]
    opsec_safe = True
    multiple_hosts = True

    def options(self, context, module_options):
        self.output = "NTLMv1 allowed on: {} - LmCompatibilityLevel = {}"

    def on_admin_login(self, context, connection):
        try:
            remote_ops = RemoteOperations(connection.conn, False)
            remote_ops.enableRegistry()

            if remote_ops._RemoteOperations__rrp:
                ans = rrp.hOpenLocalMachine(remote_ops._RemoteOperations__rrp)
                reg_handle = ans["phKey"]
                ans = rrp.hBaseRegOpenKey(
                    remote_ops._RemoteOperations__rrp,
                    reg_handle,
                    "SYSTEM\\CurrentControlSet\\Control\\Lsa",
                )
                key_handle = ans["phkResult"]
                rtype = None
                data = None
                try:
                    rtype, data = rrp.hBaseRegQueryValue(
                        remote_ops._RemoteOperations__rrp,
                        key_handle,
                        "lmcompatibilitylevel\x00",
                    )
                except rrp.DCERPCSessionError as e:
                    context.log.debug(f"Unable to reference lmcompatabilitylevel, which probably means ntlmv1 is not set")

                if rtype and data and int(data) in [0, 1, 2]:
                    context.log.highlight(self.output.format(connection.conn.getRemoteHost(), data))
        except DCERPCSessionError as e:
            context.log.debug(f"Error connecting to RemoteRegistry: {e}")
        finally:
            remote_ops.finish()