fix(packaging): move templates/ into decnet/ package so they ship with pip install
The docker build contexts and syslog_bridge.py lived at repo root, which meant setuptools (include = ["decnet*"]) never shipped them. Agents installed via `pip install $RELEASE_DIR` got site-packages/decnet/** but no templates/, so every deploy blew up in deployer._sync_logging_helper with FileNotFoundError on templates/syslog_bridge.py. Move templates/ -> decnet/templates/ and declare it as setuptools package-data. Path resolutions in services/*.py and engine/deployer.py drop one .parent since templates now lives beside the code. Test fixtures, bandit exclude path, and coverage omit glob updated to match.
This commit is contained in:
23
decnet/templates/imap/Dockerfile
Normal file
23
decnet/templates/imap/Dockerfile
Normal file
@@ -0,0 +1,23 @@
|
||||
ARG BASE_IMAGE=debian:bookworm-slim
|
||||
FROM ${BASE_IMAGE}
|
||||
|
||||
RUN apt-get update && apt-get install -y --no-install-recommends \
|
||||
python3 \
|
||||
&& rm -rf /var/lib/apt/lists/*
|
||||
|
||||
COPY syslog_bridge.py /opt/syslog_bridge.py
|
||||
COPY server.py /opt/server.py
|
||||
COPY entrypoint.sh /entrypoint.sh
|
||||
RUN chmod +x /entrypoint.sh
|
||||
|
||||
EXPOSE 143 993
|
||||
RUN useradd -r -s /bin/false -d /opt logrelay \
|
||||
&& apt-get update && apt-get install -y --no-install-recommends libcap2-bin \
|
||||
&& rm -rf /var/lib/apt/lists/* \
|
||||
&& (find /usr/bin/ -maxdepth 1 -name 'python3*' -type f -exec setcap 'cap_net_bind_service+eip' {} \; 2>/dev/null || true)
|
||||
|
||||
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
|
||||
CMD kill -0 1 || exit 1
|
||||
|
||||
USER logrelay
|
||||
ENTRYPOINT ["/entrypoint.sh"]
|
||||
3
decnet/templates/imap/entrypoint.sh
Normal file
3
decnet/templates/imap/entrypoint.sh
Normal file
@@ -0,0 +1,3 @@
|
||||
#!/bin/bash
|
||||
set -e
|
||||
exec python3 /opt/server.py
|
||||
541
decnet/templates/imap/server.py
Normal file
541
decnet/templates/imap/server.py
Normal file
@@ -0,0 +1,541 @@
|
||||
#!/usr/bin/env python3
|
||||
"""
|
||||
IMAP server (port 143).
|
||||
Full IMAP4rev1 state machine with bait mailbox.
|
||||
|
||||
States: NOT_AUTHENTICATED → AUTHENTICATED → SELECTED
|
||||
|
||||
Credentials via IMAP_USERS env var ("user:pass,user2:pass2").
|
||||
10 bait emails in INBOX containing AWS keys, DB passwords, tokens etc.
|
||||
Banner advertises Dovecot so nmap fingerprints correctly.
|
||||
"""
|
||||
|
||||
import asyncio
|
||||
import os
|
||||
from syslog_bridge import SEVERITY_WARNING, syslog_line, write_syslog_file, forward_syslog
|
||||
|
||||
NODE_NAME = os.environ.get("NODE_NAME", "mailserver")
|
||||
SERVICE_NAME = "imap"
|
||||
LOG_TARGET = os.environ.get("LOG_TARGET", "")
|
||||
PORT = int(os.environ.get("PORT", "143"))
|
||||
IMAP_BANNER = os.environ.get("IMAP_BANNER", "* OK Dovecot ready.\r\n")
|
||||
_RAW_USERS = os.environ.get("IMAP_USERS", "admin:admin123,root:toor,mail:mail,user:user")
|
||||
|
||||
VALID_USERS: dict[str, str] = {
|
||||
u: p for part in _RAW_USERS.split(",") if ":" in part for u, p in [part.split(":", 1)]
|
||||
}
|
||||
|
||||
# DEBT-026: path to a JSON file with custom email definitions.
|
||||
# When set, _BAIT_EMAILS should be replaced/extended from that file.
|
||||
# Wiring (service_cfg["email_seed"] → compose_fragment → env var → here) is deferred.
|
||||
_EMAIL_SEED_PATH = os.environ.get("IMAP_EMAIL_SEED", "") # stub — currently unused
|
||||
|
||||
# ── Bait emails ───────────────────────────────────────────────────────────────
|
||||
# All 10 live in INBOX. UID == sequence number.
|
||||
|
||||
_BAIT_EMAILS: list[dict] = [
|
||||
{
|
||||
"uid": 1, "flags": [r"\Seen"],
|
||||
"from_name": "DevOps Team", "from_addr": "devops@company.internal",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "AWS credentials rotation",
|
||||
"date": "Mon, 06 Nov 2023 09:12:33 +0000",
|
||||
"body": (
|
||||
"Date: Mon, 06 Nov 2023 09:12:33 +0000\r\n"
|
||||
"From: DevOps Team <devops@company.internal>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: AWS credentials rotation\r\n"
|
||||
"Message-ID: <1@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"Team,\r\n\r\n"
|
||||
"New AWS credentials have been issued. Old keys deactivated.\r\n\r\n"
|
||||
"Access Key ID: AKIAIOSFODNN7EXAMPLE\r\n"
|
||||
"Secret Access Key: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY\r\n\r\n"
|
||||
"Update ~/.aws/credentials immediately.\r\n\r\n-- DevOps\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 2, "flags": [r"\Seen"],
|
||||
"from_name": "Monitoring", "from_addr": "monitoring@company.internal",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "DB password changed",
|
||||
"date": "Tue, 07 Nov 2023 14:05:11 +0000",
|
||||
"body": (
|
||||
"Date: Tue, 07 Nov 2023 14:05:11 +0000\r\n"
|
||||
"From: Monitoring <monitoring@company.internal>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: DB password changed\r\n"
|
||||
"Message-ID: <2@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"Production database password was rotated.\r\n\r\n"
|
||||
"Connection string: mysql://admin:Sup3rS3cr3t!@10.0.1.5:3306/production\r\n\r\n"
|
||||
"Update all app configs.\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 3, "flags": [],
|
||||
"from_name": "GitHub", "from_addr": "noreply@github.com",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "Your personal access token",
|
||||
"date": "Wed, 08 Nov 2023 08:30:00 +0000",
|
||||
"body": (
|
||||
"Date: Wed, 08 Nov 2023 08:30:00 +0000\r\n"
|
||||
"From: GitHub <noreply@github.com>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: Your personal access token\r\n"
|
||||
"Message-ID: <3@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"Hi admin,\r\n\r\n"
|
||||
"A new personal access token was created for your account.\r\n\r\n"
|
||||
"Token: ghp_16C7e42F292c6912E7710c838347Ae178B4a\r\n\r\n"
|
||||
"If this wasn't you, revoke it immediately at github.com/settings/tokens.\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 4, "flags": [r"\Seen"],
|
||||
"from_name": "IT Admin", "from_addr": "admin@company.internal",
|
||||
"to_addr": "team@company.internal",
|
||||
"subject": "VPN config attached",
|
||||
"date": "Thu, 09 Nov 2023 11:22:47 +0000",
|
||||
"body": (
|
||||
"Date: Thu, 09 Nov 2023 11:22:47 +0000\r\n"
|
||||
"From: IT Admin <admin@company.internal>\r\n"
|
||||
"To: team@company.internal\r\n"
|
||||
"Subject: VPN config attached\r\n"
|
||||
"Message-ID: <4@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"VPN access details for new starters:\r\n\r\n"
|
||||
" Host: vpn.company.internal:1194\r\n"
|
||||
" Protocol: UDP\r\n"
|
||||
" Username: vpnadmin\r\n"
|
||||
" Password: VpnP@ss2024\r\n\r\n"
|
||||
"Config file sent separately via secure channel.\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 5, "flags": [],
|
||||
"from_name": "SysAdmin", "from_addr": "sysadmin@company.internal",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "Root password",
|
||||
"date": "Fri, 10 Nov 2023 16:45:00 +0000",
|
||||
"body": (
|
||||
"Date: Fri, 10 Nov 2023 16:45:00 +0000\r\n"
|
||||
"From: SysAdmin <sysadmin@company.internal>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: Root password\r\n"
|
||||
"Message-ID: <5@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"New root password for prod servers:\r\n\r\n"
|
||||
" r00tM3T00!\r\n\r\n"
|
||||
"Change after first login. Do NOT forward this email.\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 6, "flags": [r"\Seen"],
|
||||
"from_name": "Backup System", "from_addr": "backup@company.internal",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "Backup job failed",
|
||||
"date": "Sat, 11 Nov 2023 03:12:04 +0000",
|
||||
"body": (
|
||||
"Date: Sat, 11 Nov 2023 03:12:04 +0000\r\n"
|
||||
"From: Backup System <backup@company.internal>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: Backup job failed\r\n"
|
||||
"Message-ID: <6@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"Nightly backup to 192.168.1.50:/mnt/nas FAILED at 03:11 UTC.\r\n\r\n"
|
||||
"Error: Authentication failed. Credentials in /etc/backup.conf may be stale.\r\n\r\n"
|
||||
"Last successful backup: 2023-11-10 03:11 UTC\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 7, "flags": [r"\Seen"],
|
||||
"from_name": "Security Alerts", "from_addr": "alerts@company.internal",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "SSH brute-force alert",
|
||||
"date": "Sun, 12 Nov 2023 07:04:31 +0000",
|
||||
"body": (
|
||||
"Date: Sun, 12 Nov 2023 07:04:31 +0000\r\n"
|
||||
"From: Security Alerts <alerts@company.internal>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: SSH brute-force alert\r\n"
|
||||
"Message-ID: <7@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"47 failed SSH login attempts detected against prod-web-01.\r\n\r\n"
|
||||
"Source IPs: 185.220.101.34, 185.220.101.47, 185.220.101.52\r\n"
|
||||
"Target user: root\r\n"
|
||||
"Period: 2023-11-12 06:58 – 07:04 UTC\r\n\r\n"
|
||||
"All attempts blocked by fail2ban. No successful logins.\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 8, "flags": [r"\Seen"],
|
||||
"from_name": "External Vendor", "from_addr": "vendor@external.com",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "RE: API integration",
|
||||
"date": "Mon, 13 Nov 2023 10:11:55 +0000",
|
||||
"body": (
|
||||
"Date: Mon, 13 Nov 2023 10:11:55 +0000\r\n"
|
||||
"From: External Vendor <vendor@external.com>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: RE: API integration\r\n"
|
||||
"Message-ID: <8@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"Hi,\r\n\r\n"
|
||||
"Here is the live API key for the integration:\r\n\r\n"
|
||||
" sk_live_9mK3xF2aP7qR1bN8cT4dW6vE0yU5hJ\r\n\r\n"
|
||||
"Keep this confidential. Let me know if you need the webhook secret.\r\n\r\n"
|
||||
"Best regards,\r\nVendor Support\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 9, "flags": [],
|
||||
"from_name": "Help Desk", "from_addr": "helpdesk@company.internal",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "Password reset request",
|
||||
"date": "Tue, 14 Nov 2023 13:48:22 +0000",
|
||||
"body": (
|
||||
"Date: Tue, 14 Nov 2023 13:48:22 +0000\r\n"
|
||||
"From: Help Desk <helpdesk@company.internal>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: Password reset request\r\n"
|
||||
"Message-ID: <9@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"Hi,\r\n\r\n"
|
||||
"Could you reset my MFA? Current password is Winter2024! so you can verify it's me.\r\n\r\n"
|
||||
"Thanks\r\n"
|
||||
),
|
||||
},
|
||||
{
|
||||
"uid": 10, "flags": [r"\Seen"],
|
||||
"from_name": "AWS Billing", "from_addr": "noreply@aws.amazon.com",
|
||||
"to_addr": "admin@company.internal",
|
||||
"subject": "Your AWS bill is ready",
|
||||
"date": "Wed, 15 Nov 2023 00:01:00 +0000",
|
||||
"body": (
|
||||
"Date: Wed, 15 Nov 2023 00:01:00 +0000\r\n"
|
||||
"From: AWS Billing <noreply@aws.amazon.com>\r\n"
|
||||
"To: admin@company.internal\r\n"
|
||||
"Subject: Your AWS bill is ready\r\n"
|
||||
"Message-ID: <10@company.internal>\r\n"
|
||||
"\r\n"
|
||||
"Your AWS bill for October 2023 is $847.23.\r\n\r\n"
|
||||
"Top services:\r\n"
|
||||
" EC2 (us-east-1): $412.10\r\n"
|
||||
" RDS (us-east-1): $198.50\r\n"
|
||||
" S3: $87.43\r\n"
|
||||
" EC2 (eu-west-2): $149.20\r\n\r\n"
|
||||
"Account ID: 123456789012\r\n"
|
||||
),
|
||||
},
|
||||
]
|
||||
|
||||
_MAILBOXES = ["INBOX", "Sent", "Drafts", "Archive"]
|
||||
|
||||
# ── Logging ───────────────────────────────────────────────────────────────────
|
||||
|
||||
def _log(event_type: str, severity: int = 6, **kwargs) -> None:
|
||||
line = syslog_line(SERVICE_NAME, NODE_NAME, event_type, severity, **kwargs)
|
||||
write_syslog_file(line)
|
||||
forward_syslog(line, LOG_TARGET)
|
||||
|
||||
# ── FETCH helpers ─────────────────────────────────────────────────────────────
|
||||
|
||||
def _parse_seq_range(range_str: str, total: int) -> list[int]:
|
||||
"""Parse IMAP sequence set ('1', '1:3', '1:*', '*') → list of 1-based indices."""
|
||||
result = []
|
||||
for part in range_str.split(","):
|
||||
part = part.strip()
|
||||
if ":" in part:
|
||||
lo_s, hi_s = part.split(":", 1)
|
||||
lo = total if lo_s == "*" else int(lo_s)
|
||||
hi = total if hi_s == "*" else int(hi_s)
|
||||
result.extend(range(min(lo, hi), max(lo, hi) + 1))
|
||||
elif part == "*":
|
||||
result.append(total)
|
||||
else:
|
||||
result.append(int(part))
|
||||
return [n for n in result if 1 <= n <= total]
|
||||
|
||||
|
||||
def _parse_fetch_items(items_str: str) -> list[str]:
|
||||
"""Parse '(FLAGS ENVELOPE)' or 'BODY[]' → list of item name strings."""
|
||||
s = items_str.strip()
|
||||
if s.startswith("(") and s.endswith(")"):
|
||||
s = s[1:-1]
|
||||
tokens, i = [], 0
|
||||
while i < len(s):
|
||||
if s[i] == " ":
|
||||
i += 1
|
||||
continue
|
||||
j, depth = i, 0
|
||||
while j < len(s):
|
||||
if s[j] == "[":
|
||||
depth += 1
|
||||
elif s[j] == "]":
|
||||
depth -= 1
|
||||
elif s[j] == " " and depth == 0:
|
||||
break
|
||||
j += 1
|
||||
tokens.append(s[i:j].upper())
|
||||
i = j
|
||||
return tokens
|
||||
|
||||
|
||||
def _envelope(msg: dict) -> str:
|
||||
"""Build minimal RFC 3501 ENVELOPE tuple string."""
|
||||
def addr(name: str, email: str) -> str:
|
||||
parts = email.split("@", 1)
|
||||
user = parts[0]
|
||||
host = parts[1] if len(parts) > 1 else ""
|
||||
safe_name = name.replace('"', '\\"')
|
||||
return f'("{safe_name}" NIL "{user}" "{host}")'
|
||||
|
||||
from_addr = addr(msg["from_name"], msg["from_addr"])
|
||||
to_addr = addr("", msg["to_addr"])
|
||||
subject = msg["subject"].replace('"', '\\"')
|
||||
return (
|
||||
f'("{msg["date"]}" "{subject}" '
|
||||
f'({from_addr}) ({from_addr}) ({from_addr}) '
|
||||
f'({to_addr}) NIL NIL NIL "<{msg["uid"]}@{NODE_NAME}>")'
|
||||
)
|
||||
|
||||
|
||||
def _build_fetch_response(seq: int, msg: dict, items: list[str]) -> bytes:
|
||||
"""Build the bytes for a single '* N FETCH (...)' response."""
|
||||
non_literal: list[str] = []
|
||||
literal_name: str | None = None
|
||||
literal_raw: bytes | None = None
|
||||
|
||||
for item in items:
|
||||
norm = item.upper()
|
||||
if norm == "FLAGS":
|
||||
flags = " ".join(msg["flags"]) if msg["flags"] else ""
|
||||
non_literal.append(f"FLAGS ({flags})")
|
||||
elif norm == "ENVELOPE":
|
||||
non_literal.append(f"ENVELOPE {_envelope(msg)}")
|
||||
elif norm == "RFC822.SIZE":
|
||||
non_literal.append(f"RFC822.SIZE {len(msg['body'].encode())}")
|
||||
elif norm in ("UID",):
|
||||
non_literal.append(f"UID {msg['uid']}")
|
||||
elif norm in ("BODY[]", "RFC822", "BODY[TEXT]", "BODY.PEEK[]"):
|
||||
literal_name = "BODY[]"
|
||||
literal_raw = msg["body"].encode()
|
||||
elif norm in ("BODY[HEADER]", "BODY.PEEK[HEADER]"):
|
||||
header_part = msg["body"].split("\r\n\r\n", 1)[0] + "\r\n\r\n"
|
||||
literal_name = "BODY[HEADER]"
|
||||
literal_raw = header_part.encode()
|
||||
# unknown items silently ignored
|
||||
|
||||
if literal_raw is not None:
|
||||
prefix_str = (" ".join(non_literal) + " ") if non_literal else ""
|
||||
header = f"* {seq} FETCH ({prefix_str}{literal_name} {{{len(literal_raw)}}}\r\n".encode()
|
||||
return header + literal_raw + b")\r\n"
|
||||
else:
|
||||
return f"* {seq} FETCH ({' '.join(non_literal)})\r\n".encode()
|
||||
|
||||
|
||||
# ── Protocol ──────────────────────────────────────────────────────────────────
|
||||
|
||||
class IMAPProtocol(asyncio.Protocol):
|
||||
def __init__(self):
|
||||
self._transport = None
|
||||
self._peer = ("?", 0)
|
||||
self._buf = b""
|
||||
self._state = "NOT_AUTHENTICATED"
|
||||
self._selected = None # mailbox name currently selected
|
||||
|
||||
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])
|
||||
banner = IMAP_BANNER if IMAP_BANNER.endswith("\r\n") else IMAP_BANNER + "\r\n"
|
||||
transport.write(banner.encode())
|
||||
|
||||
def data_received(self, data):
|
||||
self._buf += data
|
||||
while b"\n" in self._buf:
|
||||
line, self._buf = self._buf.split(b"\n", 1)
|
||||
self._handle_line(line.decode(errors="replace").strip())
|
||||
|
||||
def connection_lost(self, exc):
|
||||
_log("disconnect", src=self._peer[0] if self._peer else "?")
|
||||
|
||||
# ── Command dispatch ──────────────────────────────────────────────────────
|
||||
|
||||
def _handle_line(self, line: str) -> None:
|
||||
parts = line.split(None, 2)
|
||||
if not parts:
|
||||
return
|
||||
tag = parts[0]
|
||||
cmd = parts[1].upper() if len(parts) > 1 else ""
|
||||
args = parts[2] if len(parts) > 2 else ""
|
||||
|
||||
_log("command", src=self._peer[0], cmd=cmd, state=self._state)
|
||||
|
||||
# Commands valid in any state
|
||||
if cmd == "CAPABILITY":
|
||||
self._w(b"* CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS"
|
||||
b" ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN\r\n")
|
||||
self._w(f"{tag} OK CAPABILITY completed\r\n")
|
||||
|
||||
elif cmd == "NOOP":
|
||||
self._w(f"{tag} OK\r\n")
|
||||
|
||||
elif cmd == "LOGOUT":
|
||||
self._w(b"* BYE Logging out\r\n")
|
||||
self._w(f"{tag} OK LOGOUT completed\r\n")
|
||||
self._transport.close()
|
||||
|
||||
# NOT_AUTHENTICATED only
|
||||
elif cmd == "LOGIN":
|
||||
self._cmd_login(tag, args)
|
||||
|
||||
# AUTHENTICATED or SELECTED
|
||||
elif cmd in ("LIST", "LSUB"):
|
||||
self._cmd_list(tag, cmd)
|
||||
elif cmd == "STATUS":
|
||||
self._cmd_status(tag, args)
|
||||
elif cmd in ("SELECT", "EXAMINE"):
|
||||
self._cmd_select(tag, cmd, args)
|
||||
|
||||
# SELECTED only
|
||||
elif cmd == "FETCH":
|
||||
self._cmd_fetch(tag, args, use_uid=False)
|
||||
elif cmd == "SEARCH":
|
||||
self._cmd_search(tag)
|
||||
elif cmd == "CLOSE":
|
||||
self._cmd_close(tag)
|
||||
|
||||
# UID prefix — dispatch sub-command
|
||||
elif cmd == "UID":
|
||||
sub_parts = args.split(None, 1)
|
||||
sub_cmd = sub_parts[0].upper() if sub_parts else ""
|
||||
sub_args = sub_parts[1] if len(sub_parts) > 1 else ""
|
||||
if sub_cmd == "FETCH":
|
||||
self._cmd_fetch(tag, sub_args, use_uid=True)
|
||||
elif sub_cmd == "SEARCH":
|
||||
self._cmd_search(tag, uid_mode=True)
|
||||
else:
|
||||
self._w(f"{tag} BAD Unknown UID sub-command\r\n")
|
||||
|
||||
else:
|
||||
self._w(f"{tag} BAD Command not recognized or not supported\r\n")
|
||||
|
||||
# ── Command implementations ───────────────────────────────────────────────
|
||||
|
||||
def _cmd_login(self, tag: str, args: str) -> None:
|
||||
if self._state != "NOT_AUTHENTICATED":
|
||||
self._w(f"{tag} BAD Already authenticated\r\n")
|
||||
return
|
||||
parts = args.split(None, 1)
|
||||
username = parts[0].strip('"') if parts else ""
|
||||
password = parts[1].strip('"') if len(parts) > 1 else ""
|
||||
if VALID_USERS.get(username) == password:
|
||||
self._state = "AUTHENTICATED"
|
||||
_log("auth", src=self._peer[0], username=username, password=password,
|
||||
status="success")
|
||||
self._w(f"{tag} OK [CAPABILITY IMAP4rev1] Logged in\r\n")
|
||||
else:
|
||||
_log("auth", src=self._peer[0], username=username, password=password,
|
||||
status="failed", severity=SEVERITY_WARNING)
|
||||
self._w(f"{tag} NO [AUTHENTICATIONFAILED] Authentication failed.\r\n")
|
||||
|
||||
def _cmd_list(self, tag: str, cmd: str) -> None:
|
||||
if self._state == "NOT_AUTHENTICATED":
|
||||
self._w(f"{tag} BAD Not authenticated\r\n")
|
||||
return
|
||||
for box in _MAILBOXES:
|
||||
self._w(f'* {cmd} (\\HasNoChildren) "/" "{box}"\r\n')
|
||||
self._w(f"{tag} OK {cmd} completed\r\n")
|
||||
|
||||
def _cmd_status(self, tag: str, args: str) -> None:
|
||||
if self._state == "NOT_AUTHENTICATED":
|
||||
self._w(f"{tag} BAD Not authenticated\r\n")
|
||||
return
|
||||
parts = args.split(None, 1)
|
||||
mailbox = parts[0].strip('"') if parts else "INBOX"
|
||||
attr_str = parts[1].strip("()").upper() if len(parts) > 1 else "MESSAGES"
|
||||
|
||||
counts = {"MESSAGES": 10, "RECENT": 0, "UNSEEN": 10} if mailbox == "INBOX" \
|
||||
else {"MESSAGES": 0, "RECENT": 0, "UNSEEN": 0}
|
||||
|
||||
result_parts = []
|
||||
for attr in attr_str.split():
|
||||
if attr in counts:
|
||||
result_parts.append(f"{attr} {counts[attr]}")
|
||||
self._w(f"* STATUS {mailbox} ({' '.join(result_parts)})\r\n")
|
||||
self._w(f"{tag} OK STATUS completed\r\n")
|
||||
|
||||
def _cmd_select(self, tag: str, cmd: str, args: str) -> None:
|
||||
if self._state == "NOT_AUTHENTICATED":
|
||||
self._w(f"{tag} BAD Not authenticated\r\n")
|
||||
return
|
||||
mailbox = args.strip('"')
|
||||
total = len(_BAIT_EMAILS) if mailbox == "INBOX" else 0
|
||||
self._selected = mailbox
|
||||
self._state = "SELECTED"
|
||||
self._w(f"* {total} EXISTS\r\n")
|
||||
self._w(b"* 0 RECENT\r\n")
|
||||
self._w(b"* OK [UNSEEN 1] Message 1 is first unseen\r\n")
|
||||
self._w(b"* OK [UIDVALIDITY 1712345678] UIDs valid\r\n")
|
||||
self._w(f"* OK [UIDNEXT {total + 1}] Predicted next UID\r\n")
|
||||
self._w(b"* FLAGS (\\Answered \\Flagged \\Deleted \\Seen \\Draft)\r\n")
|
||||
self._w(b"* OK [PERMANENTFLAGS (\\Deleted \\Seen \\*)] Limited\r\n")
|
||||
mode = "READ-ONLY" if cmd == "EXAMINE" else "READ-WRITE"
|
||||
self._w(f"{tag} OK [{mode}] {cmd} completed\r\n")
|
||||
|
||||
def _cmd_fetch(self, tag: str, args: str, use_uid: bool) -> None:
|
||||
if self._state != "SELECTED":
|
||||
self._w(f"{tag} BAD Not in selected state\r\n")
|
||||
return
|
||||
parts = args.split(None, 1)
|
||||
range_str = parts[0] if parts else "1:*"
|
||||
items_str = parts[1] if len(parts) > 1 else "FLAGS"
|
||||
|
||||
total = len(_BAIT_EMAILS)
|
||||
indices = _parse_seq_range(range_str, total)
|
||||
items = _parse_fetch_items(items_str)
|
||||
# Ensure UID is included when using UID FETCH
|
||||
if use_uid and "UID" not in items:
|
||||
items = ["UID"] + items
|
||||
|
||||
for seq in indices:
|
||||
if 1 <= seq <= total:
|
||||
self._transport.write(_build_fetch_response(seq, _BAIT_EMAILS[seq - 1], items))
|
||||
self._w(f"{tag} OK FETCH completed\r\n")
|
||||
|
||||
def _cmd_search(self, tag: str, uid_mode: bool = False) -> None:
|
||||
if self._state != "SELECTED":
|
||||
self._w(f"{tag} BAD Not in selected state\r\n")
|
||||
return
|
||||
nums = " ".join(str(i) for i in range(1, len(_BAIT_EMAILS) + 1))
|
||||
self._w(f"* SEARCH {nums}\r\n")
|
||||
self._w(f"{tag} OK SEARCH completed\r\n")
|
||||
|
||||
def _cmd_close(self, tag: str) -> None:
|
||||
if self._state != "SELECTED":
|
||||
self._w(f"{tag} BAD Not in selected state\r\n")
|
||||
return
|
||||
self._state = "AUTHENTICATED"
|
||||
self._selected = None
|
||||
self._w(f"{tag} OK CLOSE completed\r\n")
|
||||
|
||||
# ── Helpers ───────────────────────────────────────────────────────────────
|
||||
|
||||
def _w(self, data: str | bytes) -> None:
|
||||
if isinstance(data, str):
|
||||
data = data.encode()
|
||||
self._transport.write(data)
|
||||
|
||||
|
||||
async def main():
|
||||
_log("startup", msg=f"IMAP server starting as {NODE_NAME}")
|
||||
loop = asyncio.get_running_loop()
|
||||
server = await loop.create_server(IMAPProtocol, "0.0.0.0", PORT) # nosec B104
|
||||
async with server:
|
||||
await server.serve_forever()
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
asyncio.run(main())
|
||||
89
decnet/templates/imap/syslog_bridge.py
Normal file
89
decnet/templates/imap/syslog_bridge.py
Normal file
@@ -0,0 +1,89 @@
|
||||
#!/usr/bin/env python3
|
||||
"""
|
||||
Shared RFC 5424 syslog helper used by service containers.
|
||||
|
||||
Services call syslog_line() to format an RFC 5424 message, then
|
||||
write_syslog_file() to emit it to stdout — the container runtime
|
||||
captures it, and the host-side collector streams it into the log file.
|
||||
|
||||
RFC 5424 structure:
|
||||
<PRI>1 TIMESTAMP HOSTNAME APP-NAME PROCID MSGID [SD-ELEMENT] MSG
|
||||
|
||||
Facility: local0 (16). SD element ID uses PEN 55555.
|
||||
"""
|
||||
|
||||
from datetime import datetime, timezone
|
||||
from typing import Any
|
||||
|
||||
# ─── Constants ────────────────────────────────────────────────────────────────
|
||||
|
||||
_FACILITY_LOCAL0 = 16
|
||||
_SD_ID = "relay@55555"
|
||||
_NILVALUE = "-"
|
||||
|
||||
SEVERITY_EMERG = 0
|
||||
SEVERITY_ALERT = 1
|
||||
SEVERITY_CRIT = 2
|
||||
SEVERITY_ERROR = 3
|
||||
SEVERITY_WARNING = 4
|
||||
SEVERITY_NOTICE = 5
|
||||
SEVERITY_INFO = 6
|
||||
SEVERITY_DEBUG = 7
|
||||
|
||||
_MAX_HOSTNAME = 255
|
||||
_MAX_APPNAME = 48
|
||||
_MAX_MSGID = 32
|
||||
|
||||
# ─── Formatter ────────────────────────────────────────────────────────────────
|
||||
|
||||
def _sd_escape(value: str) -> str:
|
||||
"""Escape SD-PARAM-VALUE per RFC 5424 §6.3.3."""
|
||||
return value.replace("\\", "\\\\").replace('"', '\\"').replace("]", "\\]")
|
||||
|
||||
|
||||
def _sd_element(fields: dict[str, Any]) -> str:
|
||||
if not fields:
|
||||
return _NILVALUE
|
||||
params = " ".join(f'{k}="{_sd_escape(str(v))}"' for k, v in fields.items())
|
||||
return f"[{_SD_ID} {params}]"
|
||||
|
||||
|
||||
def syslog_line(
|
||||
service: str,
|
||||
hostname: str,
|
||||
event_type: str,
|
||||
severity: int = SEVERITY_INFO,
|
||||
timestamp: datetime | None = None,
|
||||
msg: str | None = None,
|
||||
**fields: Any,
|
||||
) -> str:
|
||||
"""
|
||||
Return a single RFC 5424-compliant syslog line (no trailing newline).
|
||||
|
||||
Args:
|
||||
service: APP-NAME (e.g. "http", "mysql")
|
||||
hostname: HOSTNAME (node name)
|
||||
event_type: MSGID (e.g. "request", "login_attempt")
|
||||
severity: Syslog severity integer (default: INFO=6)
|
||||
timestamp: UTC datetime; defaults to now
|
||||
msg: Optional free-text MSG
|
||||
**fields: Encoded as structured data params
|
||||
"""
|
||||
pri = f"<{_FACILITY_LOCAL0 * 8 + severity}>"
|
||||
ts = (timestamp or datetime.now(timezone.utc)).isoformat()
|
||||
host = (hostname or _NILVALUE)[:_MAX_HOSTNAME]
|
||||
appname = (service or _NILVALUE)[:_MAX_APPNAME]
|
||||
msgid = (event_type or _NILVALUE)[:_MAX_MSGID]
|
||||
sd = _sd_element(fields)
|
||||
message = f" {msg}" if msg else ""
|
||||
return f"{pri}1 {ts} {host} {appname} {_NILVALUE} {msgid} {sd}{message}"
|
||||
|
||||
|
||||
def write_syslog_file(line: str) -> None:
|
||||
"""Emit a syslog line to stdout for container log capture."""
|
||||
print(line, flush=True)
|
||||
|
||||
|
||||
def forward_syslog(line: str, log_target: str) -> None:
|
||||
"""No-op stub. TCP forwarding is handled by rsyslog, not by service containers."""
|
||||
pass
|
||||
Reference in New Issue
Block a user