anti
662a5e43e8
Spins up each service's server.py in a real subprocess via a free ephemeral port (PORT env var), connects with real protocol clients, and asserts both correct protocol behavior and RFC 5424 log output. - 44 live tests across 10 services: http, ftp, smtp, redis, mqtt, mysql, postgres, mongodb, pop3, imap - Shared conftest.py: _ServiceProcess (bg reader thread + queue), free_port, live_service fixture, assert_rfc5424 helper - PORT env var added to all 10 targeted server.py templates - New pytest marker `live`; excluded from default addopts run - requirements-live-tests.txt: flask, twisted + protocol clients
121 lines
4.1 KiB
Python
121 lines
4.1 KiB
Python
#!/usr/bin/env python3
|
|
"""
|
|
PostgreSQLserver.
|
|
Reads the startup message, extracts username and database, responds with
|
|
an AuthenticationMD5Password challenge, logs the hash sent back, then
|
|
returns an error. Logs all interactions as JSON.
|
|
"""
|
|
|
|
import asyncio
|
|
import os
|
|
import struct
|
|
from decnet_logging import syslog_line, write_syslog_file, forward_syslog
|
|
|
|
NODE_NAME = os.environ.get("NODE_NAME", "pgserver")
|
|
SERVICE_NAME = "postgres"
|
|
LOG_TARGET = os.environ.get("LOG_TARGET", "")
|
|
PORT = int(os.environ.get("PORT", "5432"))
|
|
def _error_response(message: str) -> bytes:
|
|
body = b"S" + b"FATAL\x00" + b"M" + message.encode() + b"\x00\x00"
|
|
return b"E" + struct.pack(">I", len(body) + 4) + body
|
|
|
|
|
|
|
|
|
|
def _log(event_type: str, severity: int = 6, **kwargs) -> None:
|
|
line = syslog_line(SERVICE_NAME, NODE_NAME, event_type, severity, **kwargs)
|
|
print(line, flush=True)
|
|
write_syslog_file(line)
|
|
forward_syslog(line, LOG_TARGET)
|
|
|
|
|
|
class PostgresProtocol(asyncio.Protocol):
|
|
def __init__(self):
|
|
self._transport = None
|
|
self._peer = None
|
|
self._buf = b""
|
|
self._state = "startup"
|
|
|
|
def connection_made(self, transport):
|
|
self._transport = transport
|
|
self._peer = transport.get_extra_info("peername", ("?", 0))
|
|
_log("connect", src=self._peer[0], src_port=self._peer[1])
|
|
|
|
def data_received(self, data):
|
|
self._buf += data
|
|
self._process()
|
|
|
|
def _process(self):
|
|
if self._state == "startup":
|
|
if len(self._buf) < 4:
|
|
return
|
|
msg_len = struct.unpack(">I", self._buf[:4])[0]
|
|
if msg_len < 8 or msg_len > 10_000:
|
|
self._transport.close()
|
|
self._buf = b""
|
|
return
|
|
if len(self._buf) < msg_len:
|
|
return
|
|
msg = self._buf[:msg_len]
|
|
self._buf = self._buf[msg_len:]
|
|
self._handle_startup(msg)
|
|
elif self._state == "auth":
|
|
if len(self._buf) < 5:
|
|
return
|
|
msg_type = chr(self._buf[0])
|
|
msg_len = struct.unpack(">I", self._buf[1:5])[0]
|
|
if msg_len < 4 or msg_len > 10_000:
|
|
self._transport.close()
|
|
self._buf = b""
|
|
return
|
|
if len(self._buf) < msg_len + 1:
|
|
return
|
|
payload = self._buf[5:msg_len + 1]
|
|
self._buf = self._buf[msg_len + 1:]
|
|
if msg_type == "p":
|
|
self._handle_password(payload)
|
|
|
|
def _handle_startup(self, msg: bytes):
|
|
# Startup message: length(4) + protocol_version(4) + params (key=value\0 pairs)
|
|
if len(msg) < 8:
|
|
return
|
|
proto = struct.unpack(">I", msg[4:8])[0]
|
|
if proto == 80877103: # SSL request
|
|
self._transport.write(b"N") # reject SSL
|
|
return
|
|
params_raw = msg[8:].split(b"\x00")
|
|
params = {}
|
|
for i in range(0, len(params_raw) - 1, 2):
|
|
k = params_raw[i].decode(errors="replace")
|
|
v = params_raw[i + 1].decode(errors="replace") if i + 1 < len(params_raw) else ""
|
|
if k:
|
|
params[k] = v
|
|
username = params.get("user", "")
|
|
database = params.get("database", "")
|
|
_log("startup", src=self._peer[0], username=username, database=database)
|
|
self._state = "auth"
|
|
salt = os.urandom(4)
|
|
auth_md5 = b"R" + struct.pack(">I", 12) + struct.pack(">I", 5) + salt
|
|
self._transport.write(auth_md5)
|
|
|
|
def _handle_password(self, payload: bytes):
|
|
pw_hash = payload.rstrip(b"\x00").decode(errors="replace")
|
|
_log("auth", src=self._peer[0], pw_hash=pw_hash)
|
|
self._transport.write(_error_response("password authentication failed"))
|
|
self._transport.close()
|
|
|
|
def connection_lost(self, exc):
|
|
_log("disconnect", src=self._peer[0] if self._peer else "?")
|
|
|
|
|
|
async def main():
|
|
_log("startup", msg=f"PostgreSQL server starting as {NODE_NAME}")
|
|
loop = asyncio.get_running_loop()
|
|
server = await loop.create_server(PostgresProtocol, "0.0.0.0", PORT) # nosec B104
|
|
async with server:
|
|
await server.serve_forever()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
asyncio.run(main())
|