mirror of
https://github.com/j93es/oauth-backend.git
synced 2026-06-04 07:41:52 +09:00
82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
import jwt
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from urllib.parse import urlparse, parse_qs
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from typing import Union
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from lib.report_vuln import report_vuln
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class NonceChecker:
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def is_oidc_flow(self, flow) -> bool:
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req = flow.request
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res = flow.response
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url = req.pretty_url
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parsed = urlparse(url)
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query = parse_qs(parsed.query)
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location = res.headers.get("location", "")
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content_type = res.headers.get("content-type", "")
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if "/authorize" in url and "response_type" in query and "openid" in query.get("scope", [""])[0]:
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return True
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if "application/json" in content_type:
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if "id_token" in res.text:
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return True
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if res.status_code in [302, 303]:
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if isinstance(location, list):
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location = location[0]
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if "id_token=" in location:
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return True
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if "/authorize" in url and "nonce" in query:
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return True
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return False
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def extract_id_token(self, response) -> Union[str, None]:
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"""
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응답에서 id_token을 추출하는 함수.
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"""
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# 1. JSON 응답에 id_token 있음
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try:
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if "application/json" in response.headers.get("content-type", ""):
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data = response.json()
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return data.get("id_token")
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except Exception:
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pass
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# 2. Location 헤더에서 id_token 파싱 (예: #id_token=...&access_token=...)
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location = response.headers.get("location", "")
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if location:
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if "#" in location:
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fragment = location.split("#")[1]
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params = parse_qs(fragment)
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return params.get("id_token", [None])[0]
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elif "?" in location:
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query = location.split("?")[1]
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params = parse_qs(query)
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return params.get("id_token", [None])[0]
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return None
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def decode_id_token(self, id_token: str) -> dict:
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try:
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return jwt.decode(id_token, options={"verify_signature": False})
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except Exception as e:
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return {}
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# TODO id_token을 파싱하는 부분이 누락되어있습니다.
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def check_nonce_in_id_token(self, flow, id_token: str) -> bool:
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decoded = self.decode_id_token(id_token)
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nonce = decoded.get("nonce")
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if not nonce:
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report_vuln(
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title="Nonce Check Failed",
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desc="id_token에 nonce가 없습니다.",
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status="HIGH",
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uri=flow.request.url
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)
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return False
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else:
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return True
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