dekun
97 lines
2.7 KiB
Python
97 lines
2.7 KiB
Python
"""中控 Bridge 鉴权与 SSO(短期登录链)."""
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from __future__ import annotations
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import hashlib
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import hmac
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import os
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import time
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from typing import Optional
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from urllib.parse import urlencode
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def hub_bridge_token() -> str:
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return (os.getenv("HUB_BRIDGE_TOKEN") or "").strip()
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def extract_hub_token_from_request(headers) -> str:
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raw = (headers.get("X-Hub-Token") or "").strip()
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if raw:
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return raw
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auth = (headers.get("Authorization") or "").strip()
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if auth.lower().startswith("bearer "):
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return auth[7:].strip()
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return ""
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def hub_bridge_token_ok(headers) -> bool:
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expected = hub_bridge_token()
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if not expected:
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return False
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got = extract_hub_token_from_request(headers)
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if not got:
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return False
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return hmac.compare_digest(got, expected)
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def make_sso_token(bridge_token: str, *, ttl_sec: int = 120) -> str:
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"""exp.hex_hmac — 中控与客户端共用 bridge_token 签名."""
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exp = int(time.time()) + max(30, int(ttl_sec))
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payload = str(exp)
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sig = hmac.new(
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bridge_token.encode("utf-8"),
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payload.encode("utf-8"),
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hashlib.sha256,
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).hexdigest()
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return f"{payload}.{sig}"
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def verify_sso_token(token: str, bridge_token: Optional[str] = None) -> bool:
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expected = (bridge_token if bridge_token is not None else hub_bridge_token()).strip()
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raw = (token or "").strip()
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if not expected or not raw or "." not in raw:
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return False
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payload, sig = raw.rsplit(".", 1)
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try:
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exp = int(payload)
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except ValueError:
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return False
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if exp < int(time.time()):
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return False
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want = hmac.new(
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expected.encode("utf-8"),
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payload.encode("utf-8"),
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hashlib.sha256,
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).hexdigest()
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return hmac.compare_digest(sig, want)
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def build_embed_open_url(
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base_url: str,
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*,
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bridge_token: str,
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embed_path: str = "/embed",
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ttl_sec: int = 120,
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) -> str:
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"""中控生成带 SSO 的客户端打开地址."""
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root = (base_url or "").rstrip("/")
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path = embed_path or "/embed"
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if not path.startswith("/"):
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path = "/" + path
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token = make_sso_token(bridge_token, ttl_sec=ttl_sec)
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q = urlencode({"token": token, "next": path})
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return f"{root}/hub_sso?{q}"
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def frame_ancestors_header_value() -> Optional[str]:
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"""
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HUB_EMBED_FRAME_ANCESTORS: 空格分隔 Origin,如 https://hub.local http://192.168.1.10:5100
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未配置则不改响应头(保持现状);配 * 则允许任意父页(仅内网慎用).
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"""
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raw = (os.getenv("HUB_EMBED_FRAME_ANCESTORS") or "").strip()
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if not raw:
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return None
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if raw == "*":
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return "*"
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parts = [p.strip() for p in raw.split() if p.strip()]
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return " ".join(parts) if parts else None
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