546 lines
18 KiB
Python
546 lines
18 KiB
Python
import argparse
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import ctypes
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import json
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import os
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import socket
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import subprocess
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import sys
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import time
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from datetime import datetime, timezone
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from typing import Any, Dict, Optional, List
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import psutil
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import base64
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import email.utils
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import hashlib
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from dataclasses import dataclass
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from urllib.parse import quote
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import requests
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from Crypto.Cipher import AES
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class TeleSecCryptoError(Exception):
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pass
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class TeleSecCouchDBError(Exception):
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pass
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def _pkcs7_pad(data: bytes, block_size: int = 16) -> bytes:
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pad_len = block_size - (len(data) % block_size)
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return data + bytes([pad_len]) * pad_len
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def _pkcs7_unpad(data: bytes, block_size: int = 16) -> bytes:
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if not data or len(data) % block_size != 0:
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raise TeleSecCryptoError("Invalid padded data length")
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pad_len = data[-1]
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if pad_len < 1 or pad_len > block_size:
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raise TeleSecCryptoError("Invalid PKCS7 padding")
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if data[-pad_len:] != bytes([pad_len]) * pad_len:
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raise TeleSecCryptoError("Invalid PKCS7 padding bytes")
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return data[:-pad_len]
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def _evp_bytes_to_key(passphrase: bytes, salt: bytes, key_len: int, iv_len: int) -> tuple[bytes, bytes]:
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d = b""
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prev = b""
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while len(d) < key_len + iv_len:
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prev = hashlib.md5(prev + passphrase + salt).digest()
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d += prev
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return d[:key_len], d[key_len : key_len + iv_len]
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def _json_dumps_like_js(value: Any) -> str:
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return json.dumps(value, ensure_ascii=False, separators=(",", ":"))
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def ts_encrypt(input_value: Any, secret: str) -> str:
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"""
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Compatible with JS: CryptoJS.AES.encrypt(payload, secret).toString()
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wrapped as RSA{<ciphertext>}.
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"""
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if secret is None or secret == "":
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if isinstance(input_value, str):
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return input_value
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return _json_dumps_like_js(input_value)
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payload = input_value
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if not isinstance(input_value, str):
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try:
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payload = _json_dumps_like_js(input_value)
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except Exception:
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payload = str(input_value)
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payload_bytes = payload.encode("utf-8")
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salt = os.urandom(8)
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key, iv = _evp_bytes_to_key(secret.encode("utf-8"), salt, 32, 16)
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cipher = AES.new(key, AES.MODE_CBC, iv=iv)
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encrypted = cipher.encrypt(_pkcs7_pad(payload_bytes, 16))
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openssl_blob = b"Salted__" + salt + encrypted
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b64 = base64.b64encode(openssl_blob).decode("utf-8")
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return f"RSA{{{b64}}}"
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def ts_decrypt(input_value: Any, secret: str) -> Any:
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"""
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Compatible with JS TS_decrypt behavior:
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- If not string: return as-is.
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- If RSA{...}: decrypt AES(CryptoJS passphrase mode), parse JSON when possible.
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- If plain string JSON: parse JSON.
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- Else: return raw string.
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"""
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if not isinstance(input_value, str):
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return input_value
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is_wrapped = input_value.startswith("RSA{") and input_value.endswith("}")
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if is_wrapped:
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if not secret:
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raise TeleSecCryptoError("Secret is required to decrypt RSA payload")
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b64 = input_value[4:-1]
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try:
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raw = base64.b64decode(b64)
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except Exception as exc:
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raise TeleSecCryptoError("Invalid base64 payload") from exc
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if len(raw) < 16 or not raw.startswith(b"Salted__"):
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raise TeleSecCryptoError("Unsupported encrypted payload format")
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salt = raw[8:16]
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ciphertext = raw[16:]
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key, iv = _evp_bytes_to_key(secret.encode("utf-8"), salt, 32, 16)
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cipher = AES.new(key, AES.MODE_CBC, iv=iv)
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decrypted = cipher.decrypt(ciphertext)
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decrypted = _pkcs7_unpad(decrypted, 16)
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try:
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text = decrypted.decode("utf-8")
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except UnicodeDecodeError:
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text = decrypted.decode("latin-1")
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try:
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return json.loads(text)
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except Exception:
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return text
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try:
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return json.loads(input_value)
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except Exception:
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return input_value
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@dataclass
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class TeleSecDoc:
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id: str
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data: Any
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raw: Dict[str, Any]
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class TeleSecCouchDB:
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"""
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Direct CouchDB client for TeleSec docs (_id = "<table>:<id>").
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No local replication layer.
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"""
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def __init__(
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self,
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server_url: str,
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dbname: str,
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secret: Optional[str] = None,
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username: Optional[str] = None,
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password: Optional[str] = None,
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timeout: int = 30,
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session: Optional[requests.Session] = None,
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) -> None:
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self.server_url = server_url.rstrip("/")
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self.dbname = dbname
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self.secret = secret or ""
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self.timeout = timeout
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self.base_url = f"{self.server_url}/{quote(self.dbname, safe='')}"
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self.session = session or requests.Session()
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self.session.headers.update({"Accept": "application/json"})
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if username is not None:
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self.session.auth = (username, password or "")
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def _iso_now(self) -> str:
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return datetime.now(timezone.utc).isoformat(timespec="milliseconds").replace("+00:00", "Z")
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def _doc_id(self, table: str, item_id: str) -> str:
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return f"{table}:{item_id}"
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def _request(self, method: str, path: str = "", **kwargs) -> requests.Response:
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url = self.base_url if not path else f"{self.base_url}/{path.lstrip('/')}"
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kwargs.setdefault("timeout", self.timeout)
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res = self.session.request(method=method, url=url, **kwargs)
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return res
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def get_server_datetime(self) -> datetime:
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"""
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Returns server datetime using HTTP Date header from CouchDB.
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Avoids reliance on local machine clock.
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"""
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candidates = [
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("HEAD", self.base_url),
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("GET", self.base_url),
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("HEAD", self.server_url),
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("GET", self.server_url),
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]
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for method, url in candidates:
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try:
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res = self.session.request(method=method, url=url, timeout=self.timeout)
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date_header = res.headers.get("Date")
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if not date_header:
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continue
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dt = email.utils.parsedate_to_datetime(date_header)
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if dt is None:
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continue
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if dt.tzinfo is None:
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dt = dt.replace(tzinfo=timezone.utc)
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return dt.astimezone(timezone.utc)
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except Exception:
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continue
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raise TeleSecCouchDBError("Unable to retrieve server time from CouchDB Date header")
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def iso_from_server_plus_minutes(self, minutes: int = 0) -> str:
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now = self.get_server_datetime()
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target = now.timestamp() + (minutes * 60)
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out = datetime.fromtimestamp(target, tz=timezone.utc)
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return out.isoformat(timespec="milliseconds").replace("+00:00", "Z")
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def check_connection(self) -> Dict[str, Any]:
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res = self._request("GET")
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if res.status_code >= 400:
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raise TeleSecCouchDBError(f"CouchDB connection failed: {res.status_code} {res.text}")
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return res.json()
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def get_raw(self, doc_id: str) -> Optional[Dict[str, Any]]:
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res = self._request("GET", quote(doc_id, safe=""))
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if res.status_code == 404:
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return None
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if res.status_code >= 400:
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raise TeleSecCouchDBError(f"GET doc failed: {res.status_code} {res.text}")
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return res.json()
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def put_raw(self, doc: Dict[str, Any]) -> Dict[str, Any]:
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if "_id" not in doc:
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raise ValueError("Document must include _id")
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res = self._request(
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"PUT",
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quote(doc["_id"], safe=""),
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headers={"Content-Type": "application/json"},
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data=_json_dumps_like_js(doc).encode("utf-8"),
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)
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if res.status_code >= 400:
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raise TeleSecCouchDBError(f"PUT doc failed: {res.status_code} {res.text}")
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return res.json()
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def delete_raw(self, doc_id: str) -> bool:
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doc = self.get_raw(doc_id)
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if not doc:
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return False
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res = self._request("DELETE", f"{quote(doc_id, safe='')}?rev={quote(doc['_rev'], safe='')}")
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if res.status_code >= 400:
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raise TeleSecCouchDBError(f"DELETE doc failed: {res.status_code} {res.text}")
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return True
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def put(self, table: str, item_id: str, data: Any, encrypt: bool = True) -> Dict[str, Any]:
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doc_id = self._doc_id(table, item_id)
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if data is None:
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self.delete_raw(doc_id)
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return {"ok": True, "id": doc_id, "deleted": True}
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existing = self.get_raw(doc_id)
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doc: Dict[str, Any] = existing if existing else {"_id": doc_id}
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to_store = data
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is_encrypted_string = isinstance(data, str) and data.startswith("RSA{") and data.endswith("}")
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if encrypt and self.secret and not is_encrypted_string:
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to_store = ts_encrypt(data, self.secret)
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doc["data"] = to_store
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doc["table"] = table
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doc["ts"] = self._iso_now()
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return self.put_raw(doc)
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def get(self, table: str, item_id: str, decrypt: bool = True) -> Optional[Any]:
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doc_id = self._doc_id(table, item_id)
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doc = self.get_raw(doc_id)
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if not doc:
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return None
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value = doc.get("data")
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if decrypt:
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return ts_decrypt(value, self.secret)
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return value
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def delete(self, table: str, item_id: str) -> bool:
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return self.delete_raw(self._doc_id(table, item_id))
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def list(self, table: str, decrypt: bool = True) -> List[TeleSecDoc]:
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params = {
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"include_docs": "true",
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"startkey": f'"{table}:"',
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"endkey": f'"{table}:\uffff"',
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}
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res = self._request("GET", "_all_docs", params=params)
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if res.status_code >= 400:
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raise TeleSecCouchDBError(f"LIST docs failed: {res.status_code} {res.text}")
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rows = res.json().get("rows", [])
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out: List[TeleSecDoc] = []
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for row in rows:
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doc = row.get("doc") or {}
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item_id = row.get("id", "").split(":", 1)[1] if ":" in row.get("id", "") else row.get("id", "")
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value = doc.get("data")
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if decrypt:
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value = ts_decrypt(value, self.secret)
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out.append(TeleSecDoc(id=item_id, data=value, raw=doc))
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return out
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def utcnow_iso() -> str:
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return datetime.now(timezone.utc).isoformat(timespec="milliseconds").replace("+00:00", "Z")
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def parse_iso(value: str) -> Optional[datetime]:
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if not value:
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return None
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try:
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v = value.strip().replace("Z", "+00:00")
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dt = datetime.fromisoformat(v)
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if dt.tzinfo is None:
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dt = dt.replace(tzinfo=timezone.utc)
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return dt.astimezone(timezone.utc)
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except Exception:
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return None
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def get_current_username() -> str:
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try:
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return psutil.Process().username() or os.getlogin()
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except Exception:
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try:
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return os.getlogin()
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except Exception:
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return os.environ.get("USERNAME", "")
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def _window_title(hwnd: int) -> str:
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buf_len = ctypes.windll.user32.GetWindowTextLengthW(hwnd)
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if buf_len <= 0:
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return ""
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buf = ctypes.create_unicode_buffer(buf_len + 1)
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ctypes.windll.user32.GetWindowTextW(hwnd, buf, buf_len + 1)
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return buf.value or ""
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def get_active_app() -> Dict[str, str]:
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exe = ""
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title = ""
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try:
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hwnd = ctypes.windll.user32.GetForegroundWindow()
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if hwnd:
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title = _window_title(hwnd)
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pid = ctypes.c_ulong()
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ctypes.windll.user32.GetWindowThreadProcessId(hwnd, ctypes.byref(pid))
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if pid.value:
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try:
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proc = psutil.Process(pid.value)
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exe = proc.name() or ""
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except Exception:
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exe = ""
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except Exception:
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pass
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return {"exe": exe, "title": title}
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def build_payload(machine_id: str) -> Dict[str, Any]:
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app = get_active_app()
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return {
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"Hostname": machine_id,
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"UsuarioActual": get_current_username(),
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"AppActualEjecutable": app.get("exe", ""),
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"AppActualTitulo": app.get("title", ""),
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# campo local diagnóstico (no se usa para decisión remota)
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"AgentLocalSeenAt": utcnow_iso(),
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}
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def should_shutdown(data: Dict[str, Any], server_now: datetime) -> bool:
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target = parse_iso(str(data.get("ShutdownBeforeDate", "") or ""))
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if not target:
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return False
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return server_now >= target
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def execute_shutdown(dry_run: bool = False) -> None:
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if dry_run:
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print("[DRY-RUN] Ejecutaría: shutdown /s /t 0 /f")
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return
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subprocess.run(["shutdown", "/s", "/t", "0", "/f"], check=False)
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def run_once(client: TeleSecCouchDB, machine_id: str, dry_run: bool = False) -> None:
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server_now = client.get_server_datetime()
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server_now_iso = server_now.isoformat(timespec="milliseconds").replace("+00:00", "Z")
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raw = client.get(table="aulas_ordenadores", item_id=machine_id, decrypt=False)
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current: Dict[str, Any] = {}
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if raw is not None:
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current = ts_decrypt(raw, client.secret)
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if not isinstance(current, dict):
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current = {}
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update = build_payload(machine_id)
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update["LastSeenAt"] = server_now_iso
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for key in ["ShutdownBeforeDate", "ShutdownRequestedAt", "ShutdownRequestedBy"]:
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if key in current:
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update[key] = current.get(key)
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client.put(table="aulas_ordenadores", item_id=machine_id, data=update, encrypt=True)
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if should_shutdown(update, server_now):
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print(f"[{server_now_iso}] ShutdownBeforeDate alcanzado. Apagando {machine_id}...")
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execute_shutdown(dry_run=dry_run)
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else:
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print(
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f"[{server_now_iso}] Reportado {machine_id} user={update.get('UsuarioActual','')} "
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f"exe={update.get('AppActualEjecutable','')} title={update.get('AppActualTitulo','')}"
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)
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def parse_args() -> argparse.Namespace:
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parser = argparse.ArgumentParser(description="TeleSec Windows Agent")
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parser.add_argument("--server", default="", help="CouchDB server URL, ej. https://couch.example")
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parser.add_argument("--db", default="telesec", help="Database name")
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parser.add_argument("--user", default="", help="CouchDB username")
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parser.add_argument("--password", default="", help="CouchDB password")
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parser.add_argument("--secret", default="", help="TeleSec secret para cifrado")
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parser.add_argument("--machine-id", default="", help="ID de máquina (default: hostname)")
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parser.add_argument("--interval", type=int, default=15, help="Intervalo en segundos")
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parser.add_argument("--once", action="store_true", help="Ejecutar una sola iteración")
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parser.add_argument("--dry-run", action="store_true", help="No apagar realmente, solo log")
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parser.add_argument(
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"--config",
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default="",
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help="Ruta de config JSON (default: ~/.telesec/windows_agent.json)",
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)
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return parser.parse_args()
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def _default_config_path() -> str:
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return os.path.join(os.path.expanduser("~"), ".telesec", "windows_agent.json")
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def _load_or_init_config(path: str) -> Dict[str, Any]:
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if not os.path.exists(path):
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os.makedirs(os.path.dirname(path), exist_ok=True)
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default_cfg = {
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"server": "https://tu-couchdb",
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"db": "telesec",
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"user": "",
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"password": "",
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"secret": "",
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"machine_id": "",
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"interval": 15,
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}
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with open(path, "w", encoding="utf-8") as f:
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json.dump(default_cfg, f, ensure_ascii=False, indent=2)
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return default_cfg
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with open(path, "r", encoding="utf-8") as f:
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data = json.load(f)
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if isinstance(data, dict):
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return data
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return {}
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def _save_config(path: str, data: Dict[str, Any]) -> None:
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os.makedirs(os.path.dirname(path), exist_ok=True)
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with open(path, "w", encoding="utf-8") as f:
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json.dump(data, f, ensure_ascii=False, indent=2)
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def _pick(cli_value: Any, cfg_value: Any, default_value: Any = None) -> Any:
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if cli_value is None:
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return cfg_value if cfg_value not in [None, ""] else default_value
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if isinstance(cli_value, str):
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if cli_value.strip() == "":
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return cfg_value if cfg_value not in [None, ""] else default_value
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return cli_value
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return cli_value
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def main() -> int:
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args = parse_args()
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config_path = args.config or _default_config_path()
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try:
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cfg = _load_or_init_config(config_path)
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except Exception as exc:
|
|
print(f"No se pudo cargar/crear config en {config_path}: {exc}", file=sys.stderr)
|
|
return 3
|
|
|
|
server = _pick(args.server, cfg.get("server"), "")
|
|
db = _pick(args.db, cfg.get("db"), "telesec")
|
|
user = _pick(args.user, cfg.get("user"), "")
|
|
password = _pick(args.password, cfg.get("password"), "")
|
|
secret = _pick(args.secret, cfg.get("secret"), "")
|
|
machine_id = _pick(args.machine_id, cfg.get("machine_id"), "")
|
|
interval = _pick(args.interval, cfg.get("interval"), 15)
|
|
|
|
machine_id = (machine_id or socket.gethostname() or "unknown-host").strip()
|
|
|
|
if not server or not secret:
|
|
print(
|
|
"Falta configuración obligatoria. Edita el JSON en: " + config_path,
|
|
file=sys.stderr,
|
|
)
|
|
return 4
|
|
|
|
# Persist effective parameters for next runs
|
|
try:
|
|
persistent_cfg = {
|
|
"server": server,
|
|
"db": db,
|
|
"user": user,
|
|
"password": password,
|
|
"secret": secret,
|
|
"machine_id": machine_id,
|
|
"interval": int(interval),
|
|
}
|
|
_save_config(config_path, persistent_cfg)
|
|
except Exception as exc:
|
|
print(f"No se pudo guardar config en {config_path}: {exc}", file=sys.stderr)
|
|
|
|
client = TeleSecCouchDB(
|
|
server_url=server,
|
|
dbname=db,
|
|
secret=secret,
|
|
username=user or None,
|
|
password=password or None,
|
|
)
|
|
|
|
try:
|
|
client.check_connection()
|
|
except TeleSecCouchDBError as exc:
|
|
print(f"Error de conexión CouchDB: {exc}", file=sys.stderr)
|
|
return 2
|
|
|
|
if args.once:
|
|
run_once(client=client, machine_id=machine_id, dry_run=args.dry_run)
|
|
return 0
|
|
|
|
while True:
|
|
try:
|
|
run_once(client=client, machine_id=machine_id, dry_run=args.dry_run)
|
|
except Exception as exc:
|
|
print(f"Error en iteración agente: {exc}", file=sys.stderr)
|
|
time.sleep(max(5, int(interval)))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
raise SystemExit(main())
|