This allows us to change them easily without search/replacing. Afterwards, we rename them to look a bit more like they are on GCP.
136 lines
4.5 KiB
Python
136 lines
4.5 KiB
Python
#!/usr/bin/env python3
|
|
import json
|
|
import sys
|
|
import time
|
|
import os
|
|
import hashlib
|
|
import base64
|
|
|
|
from http.server import BaseHTTPRequestHandler, HTTPServer
|
|
from urllib.parse import urlparse, parse_qs
|
|
from typing import Dict
|
|
|
|
SNAKEOIL_PUBLIC_KEY = os.environ['SNAKEOIL_PUBLIC_KEY']
|
|
MOCKUSER="mockuser_nixos_org"
|
|
MOCKADMIN="mockadmin_nixos_org"
|
|
|
|
|
|
def w(msg: bytes):
|
|
sys.stderr.write(f"{msg}\n")
|
|
sys.stderr.flush()
|
|
|
|
|
|
def gen_fingerprint(pubkey: str):
|
|
decoded_key = base64.b64decode(pubkey.encode("ascii").split()[1])
|
|
return hashlib.sha256(decoded_key).hexdigest()
|
|
|
|
|
|
def gen_email(username: str):
|
|
"""username seems to be a 21 characters long number string, so mimic that in a reproducible way"""
|
|
return str(int(hashlib.sha256(username.encode()).hexdigest(), 16))[0:21]
|
|
|
|
|
|
def gen_mockuser(username: str, uid: str, gid: str, home_directory: str, snakeoil_pubkey: str) -> Dict:
|
|
snakeoil_pubkey_fingerprint = gen_fingerprint(snakeoil_pubkey)
|
|
# seems to be a 21 characters long numberstring, so mimic that in a reproducible way
|
|
email = gen_email(username)
|
|
return {
|
|
"loginProfiles": [
|
|
{
|
|
"name": email,
|
|
"posixAccounts": [
|
|
{
|
|
"primary": True,
|
|
"username": username,
|
|
"uid": uid,
|
|
"gid": gid,
|
|
"homeDirectory": home_directory,
|
|
"operatingSystemType": "LINUX"
|
|
}
|
|
],
|
|
"sshPublicKeys": {
|
|
snakeoil_pubkey_fingerprint: {
|
|
"key": snakeoil_pubkey,
|
|
"expirationTimeUsec": str((time.time() + 600) * 1000000), # 10 minutes in the future
|
|
"fingerprint": snakeoil_pubkey_fingerprint
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
|
|
|
|
class ReqHandler(BaseHTTPRequestHandler):
|
|
|
|
def _send_json_ok(self, data: dict):
|
|
self.send_response(200)
|
|
self.send_header('Content-type', 'application/json')
|
|
self.end_headers()
|
|
out = json.dumps(data).encode()
|
|
w(out)
|
|
self.wfile.write(out)
|
|
|
|
def _send_json_success(self, success=True):
|
|
self.send_response(200)
|
|
self.send_header('Content-type', 'application/json')
|
|
self.end_headers()
|
|
out = json.dumps({"success": success}).encode()
|
|
w(out)
|
|
self.wfile.write(out)
|
|
|
|
def _send_404(self):
|
|
self.send_response(404)
|
|
self.end_headers()
|
|
|
|
def do_GET(self):
|
|
p = str(self.path)
|
|
pu = urlparse(p)
|
|
params = parse_qs(pu.query)
|
|
|
|
# users endpoint
|
|
if pu.path == "/computeMetadata/v1/oslogin/users":
|
|
# mockuser and mockadmin are allowed to login, both use the same snakeoil public key
|
|
if params.get('username') == [MOCKUSER] or params.get('uid') == ["1009719690"]:
|
|
username = MOCKUSER
|
|
uid = "1009719690"
|
|
elif params.get('username') == [MOCKADMIN] or params.get('uid') == ["1009719691"]:
|
|
username = MOCKADMIN
|
|
uid = "1009719691"
|
|
else:
|
|
self._send_404()
|
|
return
|
|
|
|
self._send_json_ok(gen_mockuser(username=username, uid=uid, gid=uid, home_directory=f"/home/{username}", snakeoil_pubkey=SNAKEOIL_PUBLIC_KEY))
|
|
return
|
|
|
|
# authorize endpoint
|
|
elif pu.path == "/computeMetadata/v1/oslogin/authorize":
|
|
# is user allowed to login?
|
|
if params.get("policy") == ["login"]:
|
|
# mockuser and mockadmin are allowed to login
|
|
if params.get('email') == [gen_email(MOCKUSER)] or params.get('email') == [gen_email(MOCKADMIN)]:
|
|
self._send_json_success()
|
|
return
|
|
self._send_json_success(False)
|
|
return
|
|
# is user allowed to become root?
|
|
elif params.get("policy") == ["adminLogin"]:
|
|
# only mockadmin is allowed to become admin
|
|
self._send_json_success((params['email'] == [gen_email(MOCKADMIN)]))
|
|
return
|
|
# send 404 for other policies
|
|
else:
|
|
self._send_404()
|
|
return
|
|
else:
|
|
sys.stderr.write(f"Unhandled path: {p}\n")
|
|
sys.stderr.flush()
|
|
self.send_response(404)
|
|
self.end_headers()
|
|
self.wfile.write(b'')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
s = HTTPServer(('0.0.0.0', 80), ReqHandler)
|
|
s.serve_forever()
|