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Code refactoring and adding port-hijacking backup commit

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This commit is contained in:
DomySh
2022-08-11 15:16:23 +00:00
parent f4fe3d3ab5
commit e6b4ddd4a0
6 changed files with 108 additions and 117 deletions
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59
backend/modules/porthijack/nftables.py
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@@ -1,18 +1,21 @@
from typing import List
from modules.porthijack.models import Service
from utils import ip_parse, ip_family, NFTableManager
class FiregexFilter():
def __init__(self, proto:str, port:int, ip_int:str, queue=None, target:str=None, id=None):
self.id = int(id) if id else None
self.queue = queue
class FiregexHijackRule():
def __init__(self, proto:str, public_port:int,proxy_port:int, ip_int:str, target:str, id:int):
self.id = id
self.target = target
self.proto = proto
self.port = int(port)
self.public_port = public_port
self.proxy_port = proxy_port
self.ip_int = str(ip_int)
def __eq__(self, o: object) -> bool:
if isinstance(o, FiregexFilter):
return self.port == o.port and self.proto == o.proto and ip_parse(self.ip_int) == ip_parse(o.ip_int)
if isinstance(o, FiregexHijackRule):
return self.public_port == o.public_port and self.proto == o.proto and ip_parse(self.ip_int) == ip_parse(o.ip_int)
elif isinstance(o, Service):
return self.public_port == o.public_port and self.proto == o.proto and ip_parse(self.ip_int) == ip_parse(o.ip_int)
return False
class FiregexTables(NFTableManager):
@@ -46,8 +49,12 @@ class FiregexTables(NFTableManager):
{"delete":{"chain":{"table":self.table_name,"family":"inet", "name":self.postrouting_porthijack}}}
])
def add(self, ip_int, proto, public_port, proxy_port):
ip_int = ip_parse(ip_int)
def add(self, srv:Service):
for ele in self.get():
if ele.__eq__(srv): return
ip_int = ip_parse(srv.ip_int)
ip_addr = str(ip_int).split("/")[0]
ip_addr_cidr = int(str(ip_int).split("/")[1])
self.cmd({ "insert":{ "rule": {
@@ -56,8 +63,8 @@ class FiregexTables(NFTableManager):
"chain": self.prerouting_porthijack,
"expr": [
{'match': {'left': {'payload': {'protocol': ip_family(ip_int), 'field': 'daddr'}}, 'op': '==', 'right': {"prefix": {"addr": ip_addr, "len": ip_addr_cidr}}}},
{'match': {'left': { "payload": {"protocol": str(proto), "field": "dport"}}, "op": "==", "right": int(public_port)}},
{'mangle': {'key': {'payload': {'protocol': str(proto), 'field': 'dport'}}, 'value': int(proxy_port)}}
{'match': {'left': { "payload": {"protocol": str(srv.proto), "field": "dport"}}, "op": "==", "right": int(srv.public_port)}},
{'mangle': {'key': {'payload': {'protocol': str(srv.proto), 'field': 'dport'}}, 'value': int(srv.proxy_port)}}
]
}}})
self.cmd({ "insert":{ "rule": {
@@ -66,30 +73,36 @@ class FiregexTables(NFTableManager):
"chain": self.postrouting_porthijack,
"expr": [
{'match': {'left': {'payload': {'protocol': ip_family(ip_int), 'field': 'saddr'}}, 'op': '==', 'right': {"prefix": {"addr": ip_addr, "len": ip_addr_cidr}}}},
{'match': {'left': { "payload": {"protocol": str(proto), "field": "sport"}}, "op": "==", "right": int(proxy_port)}},
{'mangle': {'key': {'payload': {'protocol': str(proto), 'field': 'sport'}}, 'value': int(public_port)}}
{'match': {'left': { "payload": {"protocol": str(srv.proto), "field": "sport"}}, "op": "==", "right": int(srv.proxy_port)}},
{'mangle': {'key': {'payload': {'protocol': str(srv.proto), 'field': 'sport'}}, 'value': int(srv.public_port)}}
]
}}})
def get(self) -> List[FiregexFilter]:
def get(self) -> List[FiregexHijackRule]:
res = []
for filter in self.list_rules(tables=[self.table_name], chains=[self.input_chain,self.output_chain]):
queue_str = filter["expr"][2]["queue"]["num"]
queue = None
if isinstance(queue_str,dict): queue = int(queue_str["range"][0]), int(queue_str["range"][1])
else: queue = int(queue_str), int(queue_str)
for filter in self.list_rules(tables=[self.table_name], chains=[self.prerouting_porthijack,self.postrouting_porthijack]):
ip_int = None
if isinstance(filter["expr"][0]["match"]["right"],str):
ip_int = str(ip_parse(filter["expr"][0]["match"]["right"]))
else:
ip_int = f'{filter["expr"][0]["match"]["right"]["prefix"]["addr"]}/{filter["expr"][0]["match"]["right"]["prefix"]["len"]}'
res.append(FiregexFilter(
res.append(FiregexHijackRule(
target=filter["chain"],
id=int(filter["handle"]),
queue=queue,
proto=filter["expr"][1]["match"]["left"]["payload"]["protocol"],
port=filter["expr"][1]["match"]["right"],
public_port=filter["expr"][1]["match"]["right"] if filter["target"] == self.prerouting_porthijack else filter["expr"][2]["mangle"]["value"],
proxy_port=filter["expr"][1]["match"]["right"] if filter["target"] == self.postrouting_porthijack else filter["expr"][2]["mangle"]["value"],
ip_int=ip_int
))
return res
def delete(self, srv:Service):
for filter in self.get():
if filter.__eq__(srv):
self.cmd({ "delete":{ "rule": {
"family": "inet",
"table": self.table_name,
"chain": filter.target,
"handle": filter.id
}}})