Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_comp_email_gateway/__init__.py @ 4348:35d41de5b2aa default tip @
doc (component): document use of Gateway Relayed Encryption:
fix 455
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Mon, 13 Jan 2025 01:23:22 +0100 |
| parents | 54df67d5646c |
| children |
| rev | line source |
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| 4303 | 1 #!/usr/bin/env python3 |
| 2 | |
| 3 # Libervia Email Gateway Component | |
| 4 # Copyright (C) 2009-2024 Jérôme Poisson (goffi@goffi.org) | |
| 5 | |
| 6 # This program is free software: you can redistribute it and/or modify | |
| 7 # it under the terms of the GNU Affero General Public License as published by | |
| 8 # the Free Software Foundation, either version 3 of the License, or | |
| 9 # (at your option) any later version. | |
| 10 | |
| 11 # This program is distributed in the hope that it will be useful, | |
| 12 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 # GNU Affero General Public License for more details. | |
| 15 | |
| 16 # You should have received a copy of the GNU Affero General Public License | |
| 17 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 18 | |
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19 import base64 |
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20 from email import encoders |
| 4303 | 21 from email.header import decode_header |
| 22 from email.message import EmailMessage | |
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23 from email.mime.application import MIMEApplication |
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24 from email.mime.multipart import MIMEMultipart |
| 4303 | 25 from email.mime.text import MIMEText |
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26 from email.utils import formataddr, getaddresses, parseaddr |
| 4303 | 27 from functools import partial |
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28 import hashlib |
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29 from pathlib import Path |
| 4303 | 30 import re |
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31 import shutil |
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32 import tempfile |
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33 from typing import NamedTuple, TYPE_CHECKING, cast |
| 4303 | 34 |
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35 from pydantic import BaseModel |
| 4303 | 36 from twisted.internet import defer, reactor |
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37 from twisted.internet.threads import deferToThread |
| 4303 | 38 from twisted.mail import smtp |
| 39 from twisted.words.protocols.jabber import jid | |
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40 from twisted.words.protocols.jabber import error as jabber_error |
| 4303 | 41 from twisted.words.protocols.jabber.error import StanzaError |
| 42 from twisted.words.protocols.jabber.xmlstream import XMPPHandler | |
| 43 from twisted.words.xish import domish | |
| 44 from wokkel import data_form, disco, iwokkel | |
| 45 from zope.interface import implementer | |
| 46 | |
| 47 from libervia.backend.core import exceptions | |
| 48 from libervia.backend.core.constants import Const as C | |
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49 from libervia.backend.core.core_types import SatXMPPComponent, SatXMPPEntity |
| 4303 | 50 from libervia.backend.core.i18n import D_, _ |
| 51 from libervia.backend.core.log import getLogger | |
| 52 from libervia.backend.memory.persistent import LazyPersistentBinaryDict | |
| 53 from libervia.backend.memory.sqla import select | |
| 54 from libervia.backend.memory.sqla_mapping import PrivateIndBin | |
| 55 from libervia.backend.models.core import MessageData | |
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56 from libervia.backend.plugins.plugin_comp_email_gateway.pubsub_service import ( |
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57 EmailGWPubsubService, |
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58 ) |
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59 from libervia.backend.plugins.plugin_exp_gre import GRE, GetDataHandler |
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60 from libervia.backend.plugins.plugin_sec_gre_encrypted_openpgp import NS_GRE_OPENPGP |
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61 from libervia.backend.plugins.plugin_sec_gre_formatter_mime import NS_GRE_MIME |
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62 from libervia.backend.plugins.plugin_xep_0033 import ( |
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63 AddressType, |
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64 AddressesData, |
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65 RECIPIENT_FIELDS, |
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66 ) |
| 4303 | 67 from libervia.backend.plugins.plugin_xep_0077 import XEP_0077 |
| 68 from libervia.backend.plugins.plugin_xep_0106 import XEP_0106 | |
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69 from libervia.backend.plugins.plugin_xep_0131 import HeadersData, Urgency, XEP_0131 |
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70 from libervia.backend.plugins.plugin_xep_0373 import binary_to_ascii_armor |
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71 from libervia.backend.plugins.plugin_xep_0498 import XEP_0498 |
| 4303 | 72 from libervia.backend.tools.utils import aio |
| 73 | |
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74 from .imap import IMAPClientFactory |
| 4303 | 75 from .models import Credentials, UserData |
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76 |
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77 if TYPE_CHECKING: |
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78 from libervia.backend.core.main import LiberviaBackend |
| 4303 | 79 |
| 80 | |
| 81 log = getLogger(__name__) | |
| 82 | |
| 83 IMPORT_NAME = "email-gateway" | |
| 84 NAME = "Libervia Email Gateway" | |
| 85 | |
| 86 PLUGIN_INFO = { | |
| 87 C.PI_NAME: "Email Gateway Component", | |
| 88 C.PI_IMPORT_NAME: IMPORT_NAME, | |
| 89 C.PI_MODES: [C.PLUG_MODE_COMPONENT], | |
| 90 C.PI_TYPE: C.PLUG_TYPE_ENTRY_POINT, | |
| 91 C.PI_PROTOCOLS: [], | |
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92 C.PI_DEPENDENCIES: [ |
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93 "XEP-0033", "XEP-0077", "XEP-0106", "XEP-0498", "GRE", "GRE-MIME", "GRE-OpenPGP" |
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94 ], |
| 4303 | 95 C.PI_RECOMMENDATIONS: [], |
| 96 C.PI_MAIN: "EmailGatewayComponent", | |
| 97 C.PI_HANDLER: C.BOOL_TRUE, | |
| 98 C.PI_DESCRIPTION: D_( | |
| 99 "Gateway to handle email. Usual emails are handled as message, while mailing " | |
| 100 "lists are converted to pubsub blogs." | |
| 101 ), | |
| 102 } | |
| 103 | |
| 104 CONF_SECTION = f"component {IMPORT_NAME}" | |
| 105 PREFIX_KEY_CREDENTIALS = "CREDENTIALS_" | |
| 106 KEY_CREDENTIALS = f"{PREFIX_KEY_CREDENTIALS}{{from_jid}}" | |
| 107 | |
| 108 email_pattern = re.compile(r"[^@]+@[^@]+\.[^@]+") | |
| 109 | |
| 110 | |
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111 class FileMetadata(NamedTuple): |
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112 path: Path |
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113 hash: str |
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114 size: int |
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115 |
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116 |
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117 class SendMailExtra(BaseModel): |
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118 addresses: AddressesData | None = None |
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119 headers: HeadersData | None = None |
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120 |
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121 |
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122 class EmailGatewayComponent(GetDataHandler): |
| 4303 | 123 IMPORT_NAME = IMPORT_NAME |
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124 gre_formatters = [NS_GRE_MIME] |
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125 gre_encrypters = [NS_GRE_OPENPGP] |
| 4303 | 126 verbose = 0 |
| 127 | |
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128 def __init__(self, host: "LiberviaBackend") -> None: |
| 4303 | 129 self.host = host |
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130 self.client: SatXMPPComponent | None = None |
| 4303 | 131 self.initalized = False |
| 132 self.storage: LazyPersistentBinaryDict | None = None | |
| 133 self._iq_register = cast(XEP_0077, host.plugins["XEP-0077"]) | |
| 134 self._iq_register.register_handler( | |
| 135 self._on_registration_form, self._on_registration_submit | |
| 136 ) | |
| 137 self._e = cast(XEP_0106, host.plugins["XEP-0106"]) | |
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138 self._shim = cast(XEP_0131, host.plugins["XEP-0131"]) |
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139 self._pfs = cast(XEP_0498, host.plugins["XEP-0498"]) |
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140 self._gre = cast(GRE, host.plugins["GRE"]) |
| 4303 | 141 # TODO: For the moment, all credentials are kept in cache; we should only keep the |
| 142 # X latest. | |
| 143 self.users_data: dict[jid.JID, UserData] = {} | |
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144 self.files_path = self.host.get_local_path(None, C.FILES_DIR) |
| 4303 | 145 host.trigger.add_with_check( |
| 146 "message_received", self, self._message_received_trigger, priority=-1000 | |
| 147 ) | |
| 148 | |
| 149 async def _init(self) -> None: | |
| 150 """Initialisation done after profile is connected""" | |
| 151 assert self.client is not None | |
| 152 self.client.identities.append(disco.DiscoIdentity("gateway", "smtp", NAME)) | |
| 153 self.storage = LazyPersistentBinaryDict(IMPORT_NAME, self.client.profile) | |
| 154 await self.connect_registered_users() | |
| 155 | |
| 156 @aio | |
| 157 async def get_registered_users(self) -> dict[jid.JID, Credentials]: | |
| 158 """Retrieve credentials for all registered users | |
| 159 | |
| 160 @return: a mapping from user JID to credentials data. | |
| 161 """ | |
| 162 assert self.client is not None | |
| 163 profile_id = self.host.memory.storage.profiles[self.client.profile] | |
| 164 async with self.host.memory.storage.session() as session: | |
| 165 query = select(PrivateIndBin).where( | |
| 166 PrivateIndBin.profile_id == profile_id, | |
| 167 PrivateIndBin.namespace == IMPORT_NAME, | |
| 168 PrivateIndBin.key.startswith(PREFIX_KEY_CREDENTIALS), | |
| 169 ) | |
| 170 result = await session.execute(query) | |
| 171 return { | |
| 172 jid.JID(p.key[len(PREFIX_KEY_CREDENTIALS) :]): p.value | |
| 173 for p in result.scalars() | |
| 174 } | |
| 175 | |
| 176 async def connect_registered_users(self) -> None: | |
| 177 """Connected users already registered to the gateway.""" | |
| 178 registered_data = await self.get_registered_users() | |
| 179 for user_jid, credentials in registered_data.items(): | |
| 180 user_data = self.users_data[user_jid] = UserData(credentials=credentials) | |
| 181 if not credentials["imap_success"]: | |
| 182 log.warning( | |
| 183 f"Ignoring unsuccessful IMAP credentials of {user_jid}. This user " | |
| 184 "won't receive message from this gateway." | |
| 185 ) | |
| 186 else: | |
| 187 try: | |
| 188 await self.connect_imap(user_jid, user_data) | |
| 189 except Exception as e: | |
| 190 log.warning(f"Can't connect {user_jid} to IMAP: {e}.") | |
| 191 else: | |
| 192 log.debug(f"Connection to IMAP server successful for {user_jid}.") | |
| 193 | |
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194 def get_handler(self, __) -> tuple[XMPPHandler, XMPPHandler]: |
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195 return EmailGatewayHandler(), EmailGWPubsubService(self) |
| 4303 | 196 |
| 197 async def profile_connecting(self, client: SatXMPPEntity) -> None: | |
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198 assert isinstance(client, SatXMPPComponent) |
| 4303 | 199 self.client = client |
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200 self._gre.register_get_data_handler(client, self) |
| 4303 | 201 if not self.initalized: |
| 202 await self._init() | |
| 203 self.initalized = True | |
| 204 | |
| 205 def _message_received_trigger( | |
| 206 self, | |
| 207 client: SatXMPPEntity, | |
| 208 message_elt: domish.Element, | |
| 209 post_treat: defer.Deferred, | |
| 210 ) -> bool: | |
| 211 """add the gateway workflow on post treatment""" | |
| 212 if client != self.client: | |
| 213 return True | |
| 214 post_treat.addCallback( | |
| 215 lambda mess_data: defer.ensureDeferred( | |
| 216 self.on_message(client, mess_data, message_elt) | |
| 217 ) | |
| 218 ) | |
| 219 return True | |
| 220 | |
| 221 async def on_message( | |
| 222 self, client: SatXMPPEntity, mess_data: MessageData, message_elt: domish.Element | |
| 223 ) -> dict: | |
| 224 """Called once message has been parsed | |
| 225 | |
| 226 @param client: Client session. | |
| 227 @param mess_data: Message data. | |
| 228 @return: Message data. | |
| 229 """ | |
| 230 if client != self.client: | |
| 231 return mess_data | |
| 232 from_jid = mess_data["from"].userhostJID() | |
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233 extra_kw = {} |
| 4303 | 234 if mess_data["type"] not in ("chat", "normal"): |
| 235 log.warning(f"ignoring message with unexpected type: {mess_data}") | |
| 236 return mess_data | |
| 237 if not client.is_local(from_jid): | |
| 238 log.warning(f"ignoring non local message: {mess_data}") | |
| 239 return mess_data | |
| 240 if not mess_data["to"].user: | |
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241 addresses = mess_data["extra"].get("addresses") |
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242 if not addresses: |
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243 log.warning(f"ignoring message addressed to gateway itself: {mess_data}") |
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244 return mess_data |
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245 else: |
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246 to_email = None |
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247 extra_kw["addresses"] = addresses |
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248 else: |
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249 try: |
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250 to_email = self._e.unescape(mess_data["to"].user) |
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251 except ValueError: |
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252 raise exceptions.DataError( |
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253 f'Invalid "to" JID, can\'t send message: {message_elt.toXml()}.' |
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254 ) |
| 4303 | 255 |
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256 encrypted_payload = self._gre.get_encrypted_payload(message_elt) |
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257 |
| 4303 | 258 try: |
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259 if encrypted_payload is not None: |
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260 # We convert the base64 datat to ASCII Armor |
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261 encrypted_binary = base64.b64decode(encrypted_payload) |
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262 encrypted_payload = binary_to_ascii_armor(encrypted_binary) |
| 4303 | 263 |
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264 assert to_email is not None |
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265 subject = "This is an encrypted message." |
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266 outer = MIMEMultipart('encrypted', protocol="application/pgp-encrypted") |
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267 outer["Subject"] = subject |
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268 # FIXME: use credentials here. |
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269 outer["From"] = from_jid.userhost() |
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270 outer["To"] = to_email |
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271 outer["Content-Type"] = "multipart/encrypted; protocol=\"application/pgp-encrypted\"" |
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272 version = MIMEApplication( |
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273 "Version: 1\n", |
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274 _subtype='pgp-encrypted', |
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275 _encoder=encoders.encode_7or8bit |
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276 ) |
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277 version["Content-Description"] = "PGP/MIME version identification" |
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278 encrypted_part = MIMEApplication( |
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279 encrypted_payload, |
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280 _subtype='octet-stream', |
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281 _encoder=encoders.encode_7or8bit |
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282 ) |
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283 encrypted_part["Content-Description"] = "OpenPGP encrypted message" |
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284 encrypted_part["Content-Type"] = "application/octet-stream; name=\"encrypted.asc\"" |
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285 encrypted_part["Content-Disposition"] = "inline; filename=\"encrypted.asc\"" |
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286 outer.attach(version) |
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287 outer.attach(encrypted_part) |
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288 body = outer.as_bytes() |
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289 await self.send_encrypted_email( |
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290 from_jid=from_jid, |
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291 to_email=to_email, |
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292 body=body, |
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293 extra=SendMailExtra(**extra_kw) if extra_kw else None, |
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294 ) |
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295 else: |
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296 self._shim.move_keywords_to_headers(mess_data["extra"]) |
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297 headers = mess_data["extra"].get("headers") |
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298 if headers: |
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299 extra_kw["headers"] = headers |
| 4303 | 300 |
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301 try: |
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302 body_lang, body = next(iter(mess_data["message"].items())) |
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303 except (KeyError, StopIteration): |
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304 log.warning(f"No body found: {mess_data}") |
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305 body_lang, body = "", "" |
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306 try: |
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307 subject_lang, subject = next(iter(mess_data["subject"].items())) |
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308 except (KeyError, StopIteration): |
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309 subject_lang, subject = "", None |
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310 |
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311 if not body and not subject: |
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312 log.warning(f"Ignoring empty message: {mess_data}") |
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313 return mess_data |
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314 |
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315 await self.send_email( |
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316 from_jid=from_jid, |
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317 to_email=to_email, |
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318 body=body, |
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319 subject=subject, |
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320 extra=SendMailExtra(**extra_kw) if extra_kw else None, |
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321 ) |
| 4303 | 322 except exceptions.UnknownEntityError: |
| 323 log.warning(f"Can't send message, user {from_jid} is not registered.") | |
| 324 message_error_elt = StanzaError( | |
| 325 "subscription-required", | |
| 326 text="User need to register to the gateway before sending emails.", | |
| 327 ).toResponse(message_elt) | |
| 328 await client.a_send(message_error_elt) | |
| 329 raise exceptions.CancelError("User not registered.") | |
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330 except StanzaError as e: |
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331 log.warning("Can't send message: {e}") |
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332 message_error_elt = e.toResponse(message_elt) |
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333 await client.a_send(message_error_elt) |
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334 raise exceptions.CancelError("Can't send message: {e}") |
| 4303 | 335 |
| 336 return mess_data | |
| 337 | |
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338 def jid_to_email( |
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339 self, client: SatXMPPEntity, address_jid: jid.JID, credentials: dict[str, str] |
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340 ) -> str: |
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341 """Convert a JID to an email address. |
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342 |
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343 If JID is from the gateway, email address will be extracted. Otherwise, the |
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344 gateway email will be used, with XMPP address specified in name part. |
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345 |
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346 @param address_jid: JID of the recipient. |
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347 @param credentials: Sender credentials. |
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348 @return: Email address. |
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349 """ |
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350 if address_jid and address_jid.host.endswith(str(client.jid)): |
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351 return self._e.unescape(address_jid.user) |
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352 else: |
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353 email_address = credentials["user_email"] |
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354 if address_jid: |
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355 email_address = formataddr((f"xmpp:{address_jid}", email_address)) |
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356 return email_address |
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357 |
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358 async def get_credentials(self, from_jid: jid.JID) -> Credentials: |
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359 """Retrieve user credentials from a bare JID. |
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360 |
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361 @param from_jid: Entity to retrieve credentials from. |
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362 @return: Credentials. |
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363 |
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364 @raise UnknownEntityError: If no credentials are found for the given JID. |
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365 """ |
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366 # We need a bare jid. |
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367 assert self.storage is not None |
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368 assert not from_jid.resource |
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369 try: |
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370 user_data = self.users_data[from_jid] |
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371 except KeyError: |
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372 key = KEY_CREDENTIALS.format(from_jid=from_jid) |
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373 credentials = await self.storage.get(key) |
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374 if credentials is None: |
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375 raise exceptions.UnknownEntityError( |
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376 f"No credentials found for {from_jid}." |
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377 ) |
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378 self.users_data[from_jid] = UserData(credentials) |
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379 else: |
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380 credentials = user_data.credentials |
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381 return credentials |
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382 |
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383 async def send_encrypted_email( |
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384 self, |
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385 from_jid: jid.JID, |
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386 to_email: str | None, |
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387 body: bytes, |
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388 extra: SendMailExtra | None = None, |
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389 ) -> None: |
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390 """Send an email using sender credentials. |
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391 |
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392 Credentials will be retrieved from cache or database. |
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393 |
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394 @param from_jid: Bare JID of the sender. |
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395 @param to_email: Email address of the recipient. |
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396 @param body: Encrypted body of the email. |
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397 @param extra: Extra data. |
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398 """ |
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399 assert self.client is not None |
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400 assert isinstance(body, bytes) |
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401 credentials = await self.get_credentials(from_jid) |
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402 |
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403 sender_domain = credentials["user_email"].split("@", 1)[-1] |
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404 recipients = [] |
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405 if to_email is not None: |
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406 recipients.append(to_email.encode()) |
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407 if extra is not None and extra.addresses is not None: |
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408 for address in extra.addresses.addresses: |
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409 recipient_jid = address.jid |
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410 if recipient_jid is None: |
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411 continue |
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412 recipient_email = self.jid_to_email( |
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413 self.client, recipient_jid, credentials |
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414 ) |
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415 recipients.append(recipient_email.encode()) |
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416 |
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417 if not recipients: |
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418 raise exceptions.InternalError("No recipient found.") |
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419 |
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420 await smtp.sendmail( |
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421 credentials["smtp_host"].encode(), |
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422 credentials["user_email"].encode(), |
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423 recipients, |
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424 body, |
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425 senderDomainName=sender_domain, |
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426 port=int(credentials["smtp_port"]), |
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427 username=credentials["smtp_username"].encode(), |
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428 password=credentials["smtp_password"].encode(), |
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429 requireAuthentication=True, |
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430 # TODO: only STARTTLS is supported right now, implicit TLS should be supported |
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431 # too. |
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432 requireTransportSecurity=True, |
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433 ) |
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434 |
| 4303 | 435 async def send_email( |
| 436 self, | |
| 437 from_jid: jid.JID, | |
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438 to_email: str | None, |
| 4303 | 439 body: str, |
| 440 subject: str | None, | |
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441 extra: SendMailExtra | None = None, |
| 4303 | 442 ) -> None: |
| 443 """Send an email using sender credentials. | |
| 444 | |
| 445 Credentials will be retrieve from cache, or database. | |
| 446 | |
| 447 @param from_jid: Bare JID of the sender. | |
| 448 @param to_email: Email address of the destinee. | |
| 449 @param body: Body of the email. | |
| 450 @param subject: Subject of the email. | |
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451 @param extra: Extra data. |
| 4303 | 452 |
| 453 @raise exceptions.UnknownEntityError: Credentials for "from_jid" can't be found. | |
| 454 """ | |
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455 assert self.client is not None |
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456 if extra is None: |
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457 extra = SendMailExtra() |
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458 if to_email is None and (extra.addresses is None or not extra.addresses.to): |
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459 raise exceptions.InternalError( |
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460 '"to_email" can\'t be None if there is no "to" address!' |
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461 ) |
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462 |
|
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463 credentials = await self.get_credentials(from_jid) |
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464 |
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465 if isinstance(body, bytes): |
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466 assert to_email is not None |
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467 sender_domain = credentials["user_email"].split("@", 1)[-1] |
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468 await smtp.sendmail( |
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469 credentials["smtp_host"].encode(), |
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470 credentials["user_email"].encode(), |
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471 [to_email.encode()], |
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472 body, |
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473 senderDomainName=sender_domain, |
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474 port=int(credentials["smtp_port"]), |
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475 username=credentials["smtp_username"].encode(), |
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476 password=credentials["smtp_password"].encode(), |
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477 requireAuthentication=True, |
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478 # TODO: only STARTTLS is supported right now, implicit TLS should be supported |
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479 # too. |
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480 requireTransportSecurity=True, |
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481 ) |
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482 return |
| 4303 | 483 |
| 484 msg = MIMEText(body, "plain", "UTF-8") | |
| 485 if subject is not None: | |
| 486 msg["Subject"] = subject | |
| 487 msg["From"] = formataddr( | |
| 488 (credentials["user_name"] or None, credentials["user_email"]) | |
| 489 ) | |
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490 if extra.addresses: |
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491 assert extra.addresses.to |
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492 main_to_address = extra.addresses.to[0] |
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493 assert main_to_address.jid |
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494 to_email = self.jid_to_email(self.client, main_to_address.jid, credentials) |
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495 for field in RECIPIENT_FIELDS: |
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496 addresses = getattr(extra.addresses, field) |
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497 if not addresses: |
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498 continue |
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499 for address in addresses: |
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500 if not address.delivered and ( |
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501 address.jid is None or address.jid.host != str(self.client.jid) |
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502 ): |
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503 log.warning( |
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504 "Received undelivered message to external JID, this is not " |
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505 "allowed! Cancelling the message sending." |
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506 ) |
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507 stanza_err = jabber_error.StanzaError( |
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508 "forbidden", |
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509 text="Multicasting (XEP-0033 addresses) can only be used " |
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510 "with JID from this gateway, not external ones. " |
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511 f" {address.jid} can't be delivered by this gateway and " |
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512 "should be delivered by server instead.", |
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513 ) |
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514 raise stanza_err |
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515 email_addresses = [ |
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516 self.jid_to_email(self.client, address.jid, credentials) |
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517 for address in addresses |
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518 if address.jid |
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519 ] |
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520 if email_addresses: |
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521 msg[field.upper()] = ", ".join(email_addresses) |
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522 else: |
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523 assert to_email is not None |
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524 msg["To"] = to_email |
| 4303 | 525 |
| 526 sender_domain = credentials["user_email"].split("@", 1)[-1] | |
| 527 | |
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528 if extra.headers: |
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529 if extra.headers.keywords: |
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530 msg["Keywords"] = extra.headers.keywords |
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531 if extra.headers.urgency: |
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532 urgency = extra.headers.urgency |
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533 if urgency == Urgency.medium: |
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534 importance = "normal" |
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535 else: |
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536 importance = urgency |
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537 msg["Importance"] = importance |
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538 |
| 4303 | 539 await smtp.sendmail( |
| 540 credentials["smtp_host"].encode(), | |
| 541 credentials["user_email"].encode(), | |
| 542 [to_email.encode()], | |
| 543 msg.as_bytes(), | |
| 544 senderDomainName=sender_domain, | |
| 545 port=int(credentials["smtp_port"]), | |
| 546 username=credentials["smtp_username"].encode(), | |
| 547 password=credentials["smtp_password"].encode(), | |
| 548 requireAuthentication=True, | |
| 549 # TODO: only STARTTLS is supported right now, implicit TLS should be supported | |
| 550 # too. | |
| 551 requireTransportSecurity=True, | |
| 552 ) | |
| 553 | |
| 554 async def _on_registration_form( | |
| 555 self, client: SatXMPPEntity, iq_elt: domish.Element | |
| 556 ) -> tuple[bool, data_form.Form] | None: | |
| 557 if client != self.client: | |
| 558 return | |
| 559 assert self.storage is not None | |
| 560 from_jid = jid.JID(iq_elt["from"]) | |
| 561 key = KEY_CREDENTIALS.format(from_jid=from_jid.userhost()) | |
| 562 credentials = await self.storage.get(key) or {} | |
| 563 | |
| 564 form = data_form.Form(formType="form", title="IMAP/SMTP Credentials") | |
| 565 | |
| 566 # Add instructions | |
| 567 form.instructions = [ | |
| 568 D_( | |
| 569 "Please provide your IMAP and SMTP credentials to configure the " | |
| 570 "connection." | |
| 571 ) | |
| 572 ] | |
| 573 | |
| 574 # Add identity fields | |
| 575 form.addField( | |
| 576 data_form.Field( | |
| 577 fieldType="text-single", | |
| 578 var="user_name", | |
| 579 label="User Name", | |
| 580 desc=D_('The display name to use in the "From" field of sent emails.'), | |
| 581 value=credentials.get("user_name"), | |
| 582 required=True, | |
| 583 ) | |
| 584 ) | |
| 585 | |
| 586 form.addField( | |
| 587 data_form.Field( | |
| 588 fieldType="text-single", | |
| 589 var="user_email", | |
| 590 label="User Email", | |
| 591 desc=D_('The email address to use in the "From" field of sent emails.'), | |
| 592 value=credentials.get("user_email"), | |
| 593 required=True, | |
| 594 ) | |
| 595 ) | |
| 596 | |
| 597 # Add fields for IMAP credentials | |
| 598 form.addField( | |
| 599 data_form.Field( | |
| 600 fieldType="text-single", | |
| 601 var="imap_host", | |
| 602 label="IMAP Host", | |
| 603 desc=D_("IMAP server hostname or IP address"), | |
| 604 value=credentials.get("imap_host"), | |
| 605 required=True, | |
| 606 ) | |
| 607 ) | |
| 608 form.addField( | |
| 609 data_form.Field( | |
| 610 fieldType="text-single", | |
| 611 var="imap_port", | |
| 612 label="IMAP Port", | |
| 613 desc=D_("IMAP server port (default: 993)"), | |
| 614 value=credentials.get("imap_port", "993"), | |
| 615 ) | |
| 616 ) | |
| 617 form.addField( | |
| 618 data_form.Field( | |
| 619 fieldType="text-single", | |
| 620 var="imap_username", | |
| 621 label="IMAP Username", | |
| 622 desc=D_("Username for IMAP authentication"), | |
| 623 value=credentials.get("imap_username"), | |
| 624 required=True, | |
| 625 ) | |
| 626 ) | |
| 627 form.addField( | |
| 628 data_form.Field( | |
| 629 fieldType="text-private", | |
| 630 var="imap_password", | |
| 631 label="IMAP Password", | |
| 632 desc=D_("Password for IMAP authentication"), | |
| 633 value=credentials.get("imap_password"), | |
| 634 required=True, | |
| 635 ) | |
| 636 ) | |
| 637 | |
| 638 # Add fields for SMTP credentials | |
| 639 form.addField( | |
| 640 data_form.Field( | |
| 641 fieldType="text-single", | |
| 642 var="smtp_host", | |
| 643 label="SMTP Host", | |
| 644 desc=D_("SMTP server hostname or IP address"), | |
| 645 value=credentials.get("smtp_host"), | |
| 646 required=True, | |
| 647 ) | |
| 648 ) | |
| 649 form.addField( | |
| 650 data_form.Field( | |
| 651 fieldType="text-single", | |
| 652 var="smtp_port", | |
| 653 label="SMTP Port", | |
| 654 desc=D_("SMTP server port (default: 587)"), | |
| 655 value=credentials.get("smtp_port", "587"), | |
| 656 ) | |
| 657 ) | |
| 658 form.addField( | |
| 659 data_form.Field( | |
| 660 fieldType="text-single", | |
| 661 var="smtp_username", | |
| 662 label="SMTP Username", | |
| 663 desc=D_("Username for SMTP authentication"), | |
| 664 value=credentials.get("smtp_username"), | |
| 665 required=True, | |
| 666 ) | |
| 667 ) | |
| 668 form.addField( | |
| 669 data_form.Field( | |
| 670 fieldType="text-private", | |
| 671 var="smtp_password", | |
| 672 label="SMTP Password", | |
| 673 desc=D_("Password for SMTP authentication"), | |
| 674 value=credentials.get("smtp_password"), | |
| 675 required=True, | |
| 676 ) | |
| 677 ) | |
| 678 | |
| 679 return bool(credentials), form | |
| 680 | |
| 681 def validate_field( | |
| 682 self, | |
| 683 form: data_form.Form, | |
| 684 key: str, | |
| 685 field_type: str, | |
| 686 min_value: int | None = None, | |
| 687 max_value: int | None = None, | |
| 688 default: str | int | None = None, | |
| 689 ) -> None: | |
| 690 """Validate a single field. | |
| 691 | |
| 692 @param form: The form containing the fields. | |
| 693 @param key: The key of the field to validate. | |
| 694 @param field_type: The expected type of the field value. | |
| 695 @param min_value: Optional minimum value for integer fields. | |
| 696 @param max_value: Optional maximum value for integer fields. | |
| 697 @param default: Default value to use if the field is missing. | |
| 698 @raise StanzaError: If the field value is invalid or missing. | |
| 699 """ | |
| 700 field = form.fields.get(key) | |
| 701 if field is None: | |
| 702 if default is None: | |
| 703 raise StanzaError("bad-request", text=f"{key} is required") | |
| 704 field = data_form.Field(var=key, value=str(default)) | |
| 705 form.addField(field) | |
| 706 | |
| 707 value = field.value | |
| 708 if field_type == "int": | |
| 709 try: | |
| 710 value = int(value) | |
| 711 if (min_value is not None and value < min_value) or ( | |
| 712 max_value is not None and value > max_value | |
| 713 ): | |
| 714 raise ValueError | |
| 715 except (ValueError, TypeError): | |
| 716 raise StanzaError("bad-request", text=f"Invalid value for {key}: {value}") | |
| 717 elif field_type == "str": | |
| 718 if not isinstance(value, str): | |
| 719 raise StanzaError("bad-request", text=f"Invalid value for {key}: {value}") | |
| 720 | |
| 721 # Basic email validation for user_email field | |
| 722 if key == "user_email": | |
| 723 # XXX: This is a minimal check. A complete email validation is notoriously | |
| 724 # difficult. | |
| 725 if not email_pattern.match(value): | |
| 726 raise StanzaError( | |
| 727 "bad-request", text=f"Invalid email address: {value}" | |
| 728 ) | |
| 729 | |
| 730 def validate_imap_smtp_form(self, submit_form: data_form.Form) -> None: | |
| 731 """Validate the submitted IMAP/SMTP credentials form. | |
| 732 | |
| 733 @param submit_form: The submitted form containing IMAP/SMTP credentials. | |
| 734 @raise StanzaError: If any of the values are invalid. | |
| 735 """ | |
| 736 # Validate identity fields | |
| 737 self.validate_field(submit_form, "user_name", "str") | |
| 738 self.validate_field(submit_form, "user_email", "str") | |
| 739 | |
| 740 # Validate IMAP fields | |
| 741 self.validate_field(submit_form, "imap_host", "str") | |
| 742 self.validate_field( | |
| 743 submit_form, "imap_port", "int", min_value=1, max_value=65535, default=993 | |
| 744 ) | |
| 745 self.validate_field(submit_form, "imap_username", "str") | |
| 746 self.validate_field(submit_form, "imap_password", "str") | |
| 747 | |
| 748 # Validate SMTP fields | |
| 749 self.validate_field(submit_form, "smtp_host", "str") | |
| 750 self.validate_field( | |
| 751 submit_form, "smtp_port", "int", min_value=1, max_value=65535, default=587 | |
| 752 ) | |
| 753 self.validate_field(submit_form, "smtp_username", "str") | |
| 754 self.validate_field(submit_form, "smtp_password", "str") | |
| 755 | |
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756 def email_to_jid( |
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757 self, |
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758 client: SatXMPPEntity, |
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759 user_email: str, |
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760 user_jid: jid.JID, |
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761 email_name: str, |
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762 email_addr: str, |
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763 ) -> tuple[jid.JID, str | None]: |
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764 """Convert an email address to a JID and extract the name if present. |
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765 |
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766 @param client: Client session. |
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767 @param user_email: Email address of the gateway user. |
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768 @param user_jid: JID of the gateway user. |
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769 @param email_name: Email associated name. |
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770 @param email_addr: Email address. |
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771 @return: Tuple of JID and name (if present). |
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772 """ |
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773 email_name = email_name.strip() |
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774 if email_name.startswith("xmpp:"): |
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775 return jid.JID(email_name[5:]), None |
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776 elif email_addr == user_email: |
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777 return (user_jid, None) |
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778 else: |
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779 return ( |
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780 jid.JID(None, (self._e.escape(email_addr), client.jid.host, None)), |
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781 email_name or None, |
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782 ) |
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783 |
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784 async def on_new_email( |
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785 self, user_data: UserData, user_jid: jid.JID, email: EmailMessage |
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786 ) -> None: |
| 4303 | 787 """Called when a new message has been received. |
| 788 | |
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789 @param user_data: user data, used to map registered user email to corresponding |
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790 jid. |
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791 @param user_jid: JID of the recipient. |
| 4303 | 792 @param email: Parsed email. |
| 793 """ | |
| 794 assert self.client is not None | |
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795 user_email = user_data.credentials["user_email"] |
| 4303 | 796 name, email_addr = parseaddr(email["from"]) |
| 797 email_addr = email_addr.lower() | |
| 798 from_jid = jid.JID(None, (self._e.escape(email_addr), self.client.jid.host, None)) | |
| 799 | |
| 800 # Get the email body | |
| 801 body_mime = email.get_body(("plain",)) | |
| 802 if body_mime is not None: | |
| 803 charset = body_mime.get_content_charset() or "utf-8" | |
| 804 body = body_mime.get_payload(decode=True).decode(charset, errors="replace") | |
| 805 else: | |
| 806 log.warning(f"No body found in email:\n{email}") | |
| 807 body = "" | |
| 808 | |
| 809 # Decode the subject | |
| 810 subject = email.get("subject") | |
| 811 if subject: | |
| 812 decoded_subject = decode_header(subject) | |
| 813 subject = "".join( | |
| 814 [ | |
| 815 part.decode(encoding or "utf-8") if isinstance(part, bytes) else part | |
| 816 for part, encoding in decoded_subject | |
| 817 ] | |
| 818 ).strip() | |
| 819 else: | |
| 820 subject = None | |
| 821 | |
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822 # Parse recipient fields |
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823 kwargs = {} |
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824 for field in RECIPIENT_FIELDS: |
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825 email_addresses = email.get_all(field) |
|
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826 if email_addresses: |
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827 jids_and_names = [ |
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828 self.email_to_jid(self.client, user_email, user_jid, name, addr) |
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829 for name, addr in getaddresses(email_addresses) |
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830 ] |
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831 kwargs[field] = [ |
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832 AddressType(jid=jid, desc=name) for jid, name in jids_and_names |
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833 ] |
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834 |
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835 # At least "to" header should be set, so kwargs should never be empty |
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836 assert kwargs |
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837 addresses_data = AddressesData(**kwargs) |
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838 |
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839 # Parse reply-to field |
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840 reply_to_addresses = email.get_all("reply-to") |
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841 if reply_to_addresses: |
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842 jids_with_names = [ |
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843 self.email_to_jid(self.client, user_email, user_jid, name, addr) |
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844 for name, addr in getaddresses(reply_to_addresses) |
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845 ] |
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846 addresses_data.replyto = [ |
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847 AddressType(jid=jid, desc=name) for jid, name in jids_with_names |
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848 ] |
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849 |
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850 # Set noreply flag |
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851 # The is no flag to indicate a no-reply message, so we check common user parts in |
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852 # from and reply-to headers. |
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853 from_addresses = [email_addr] |
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|
854 if reply_to_addresses: |
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|
855 from_addresses.extend( |
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|
856 addr for a in reply_to_addresses if (addr := parseaddr(a)[1]) |
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857 ) |
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|
858 for from_address in from_addresses: |
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859 from_user_part = from_address.split("@", 1)[0].lower() |
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|
860 if from_user_part in ( |
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|
861 "no-reply", |
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|
862 "noreply", |
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|
863 "do-not-reply", |
|
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|
864 "donotreply", |
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|
865 "notification", |
|
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|
866 "notifications", |
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|
867 ): |
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|
868 addresses_data.noreply = True |
|
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|
869 break |
|
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|
870 extra = {} |
|
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|
871 |
|
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|
872 if ( |
|
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|
873 not addresses_data.replyto |
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|
874 and not addresses_data.noreply |
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|
875 and not addresses_data.cc |
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|
876 and not addresses_data.bcc |
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|
877 and addresses_data.to == [AddressType(jid=user_jid)] |
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|
878 ): |
|
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|
879 # The main recipient is the only one, and there is no other metadata: there is |
|
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|
880 # no need to add addresses metadata. |
|
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|
881 pass |
|
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|
882 else: |
|
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|
883 for address in addresses_data.addresses: |
|
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|
884 if address.jid and ( |
|
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|
885 address.jid == user_jid or address.jid.host == str(self.client.jid) |
|
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|
886 ): |
|
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|
887 # Those are email address, and have been delivered by the sender, |
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|
888 # other JID addresses will have to be delivered by us. |
|
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|
889 address.delivered = True |
|
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|
890 |
|
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|
891 extra["addresses"] = addresses_data.model_dump(mode="json", exclude_none=True) |
|
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|
892 |
|
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|
893 # We look for interesting headers |
|
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|
894 headers = {} |
|
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|
895 keywords_headers = email.get_all("keywords") |
|
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|
896 if keywords_headers: |
|
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|
897 keywords = ",".join(keywords_headers) |
|
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|
898 headers["keywords"] = keywords |
|
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|
899 |
|
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|
900 importance = email["importance"] |
|
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|
901 if importance: |
|
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|
902 # We convert to urgency |
|
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|
903 if importance in ("low", "high"): |
|
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|
904 headers["urgency"] = importance |
|
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|
905 elif importance == "normal": |
|
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|
906 headers["urgency"] = "medium" |
|
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|
907 else: |
|
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|
908 log.warning("Ignoring invalid importance header: {importance!r}") |
|
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|
909 |
|
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|
910 if headers: |
|
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|
911 extra["headers"] = HeadersData(**headers).model_dump( |
|
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|
912 mode="json", exclude_none=True |
|
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|
913 ) |
|
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|
914 |
|
4337
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|
915 # Handle attachments |
|
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|
916 for part in email.iter_attachments(): |
|
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|
917 await self.handle_attachment(part, user_jid) |
|
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|
918 |
| 4303 | 919 client = self.client.get_virtual_client(from_jid) |
|
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|
920 |
|
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|
921 await client.sendMessage( |
|
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|
922 user_jid, |
|
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|
923 {"": body}, |
|
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|
924 {"": subject} if subject else None, |
|
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|
925 extra=extra, |
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|
926 ) |
| 4303 | 927 |
|
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|
928 async def handle_attachment(self, part: EmailMessage, recipient_jid: jid.JID) -> None: |
|
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|
929 """Handle an attachment from an email. |
|
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|
930 |
|
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|
931 @param part: The object representing the attachment. |
|
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|
932 @param recipient_jid: JID of the recipient to whom the attachment is being sent. |
|
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|
933 """ |
|
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|
934 assert self.client is not None |
|
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|
935 content_type = part.get_content_type() |
|
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|
936 filename = part.get_filename() or "attachment" |
|
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|
937 log.debug(f"Handling attachment: {filename} ({content_type})") |
|
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|
938 file_metadata = await deferToThread(self._save_attachment, part) |
|
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changeset
|
939 if file_metadata is not None: |
|
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changeset
|
940 log.debug(f"Attachment {filename!r} saved to {file_metadata.path}") |
|
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|
941 try: |
|
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|
942 await self.host.memory.set_file( |
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943 self.client, |
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944 filename, |
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945 file_hash=file_metadata.hash, |
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946 hash_algo="sha-256", |
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947 size=file_metadata.size, |
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948 namespace=PLUGIN_INFO[C.PI_IMPORT_NAME], |
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949 mime_type=content_type, |
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950 owner=recipient_jid, |
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951 ) |
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952 except Exception: |
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953 log.exception(f"Failed to register file {filename!r}") |
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954 |
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955 def _save_attachment(self, part: EmailMessage) -> FileMetadata | None: |
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956 """Save the attachment to files path. |
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957 |
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958 This method must be executed in a thread with deferToThread to avoid blocking the |
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959 reactor with IO operations if the attachment is large. |
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960 |
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961 @param part: The object representing the attachment. |
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962 @return: Attachment data, or None if an error occurs. |
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963 @raises IOError: Can't save the attachment. |
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964 """ |
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965 temp_file = None |
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966 try: |
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967 with tempfile.NamedTemporaryFile(delete=False) as temp_file: |
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968 payload = part.get_payload(decode=True) |
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969 if isinstance(payload, bytes): |
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970 temp_file.write(payload) |
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971 file_hash = hashlib.sha256(payload).hexdigest() |
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972 file_path = self.files_path / file_hash |
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973 shutil.move(temp_file.name, file_path) |
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974 file_size = len(payload) |
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975 return FileMetadata(path=file_path, hash=file_hash, size=file_size) |
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976 else: |
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977 log.warning(f"Can't write payload of type {type(payload)}.") |
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978 return None |
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979 except Exception as e: |
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980 raise IOError(f"Failed to save attachment: {e}") |
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981 finally: |
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982 if temp_file is not None and Path(temp_file.name).exists(): |
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983 Path(temp_file.name).unlink() |
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984 |
| 4303 | 985 async def connect_imap(self, from_jid: jid.JID, user_data: UserData) -> None: |
| 986 """Connect to IMAP service. | |
| 987 | |
| 988 [self.on_new_email] will be used as callback on new messages. | |
| 989 | |
| 990 @param from_jid: JID of the user associated with given credentials. | |
| 991 @param credentials: Email credentials. | |
| 992 """ | |
| 993 credentials = user_data.credentials | |
| 994 | |
| 995 connected = defer.Deferred() | |
| 996 factory = IMAPClientFactory( | |
| 997 user_data, | |
|
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998 partial(self.on_new_email, user_data, from_jid.userhostJID()), |
| 4303 | 999 connected, |
| 1000 ) | |
| 1001 reactor.connectTCP( | |
| 1002 credentials["imap_host"], int(credentials["imap_port"]), factory | |
| 1003 ) | |
| 1004 await connected | |
| 1005 | |
| 1006 async def _on_registration_submit( | |
| 1007 self, | |
| 1008 client: SatXMPPEntity, | |
| 1009 iq_elt: domish.Element, | |
| 1010 submit_form: data_form.Form | None, | |
| 1011 ) -> bool | None: | |
| 1012 """Handle registration submit request. | |
| 1013 | |
| 1014 Submit form is validated, and credentials are stored. | |
| 1015 @param client: client session. | |
| 1016 iq_elt: IQ stanza of the submission request. | |
| 1017 submit_form: submit form. | |
| 1018 @return: True if successful. | |
| 1019 None if the callback is not relevant for this request. | |
| 1020 """ | |
| 1021 if client != self.client: | |
| 1022 return | |
| 1023 assert self.storage is not None | |
| 1024 from_jid = jid.JID(iq_elt["from"]).userhostJID() | |
| 1025 | |
| 1026 if submit_form is None: | |
| 1027 # This is an unregistration request. | |
| 1028 try: | |
| 1029 user_data = self.users_data[from_jid] | |
| 1030 except KeyError: | |
| 1031 pass | |
| 1032 else: | |
| 1033 if user_data.imap_client is not None: | |
| 1034 try: | |
| 1035 await user_data.imap_client.logout() | |
| 1036 except Exception: | |
| 1037 log.exception(f"Can't log out {from_jid} from IMAP server.") | |
| 1038 key = KEY_CREDENTIALS.format(from_jid=from_jid) | |
| 1039 await self.storage.adel(key) | |
| 1040 log.info(f"{from_jid} unregistered from this gateway.") | |
| 1041 return True | |
| 1042 | |
| 1043 self.validate_imap_smtp_form(submit_form) | |
| 1044 credentials = {key: field.value for key, field in submit_form.fields.items()} | |
| 1045 user_data = self.users_data.get(from_jid) | |
| 1046 if user_data is None: | |
| 1047 # The user is not in cache, we cache current credentials. | |
| 1048 user_data = self.users_data[from_jid] = UserData(credentials=credentials) | |
| 1049 else: | |
| 1050 # The user is known, we update credentials. | |
| 1051 user_data.credentials = credentials | |
| 1052 key = KEY_CREDENTIALS.format(from_jid=from_jid) | |
| 1053 try: | |
| 1054 await self.connect_imap(from_jid, user_data) | |
| 1055 except Exception as e: | |
| 1056 log.warning(f"Can't connect to IMAP server for {from_jid}") | |
| 1057 credentials["imap_success"] = False | |
| 1058 await self.storage.aset(key, credentials) | |
| 1059 raise e | |
| 1060 else: | |
| 1061 log.debug(f"Connection successful to IMAP server for {from_jid}") | |
| 1062 credentials["imap_success"] = True | |
| 1063 await self.storage.aset(key, credentials) | |
| 1064 return True | |
| 1065 | |
| 1066 | |
|
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1067 async def on_relayed_encryption_data( |
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1068 self, |
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1069 client: SatXMPPEntity, |
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1070 iq_elt: domish.Element, |
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1071 form: data_form.Form |
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1072 ) -> None: |
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|
1073 from_jid = jid.JID(iq_elt["from"]).userhostJID() |
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1074 credentials = await self.get_credentials(from_jid) |
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1075 form.addField(data_form.Field(var="sender_id", value=credentials["user_email"])) |
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1076 |
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1077 |
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1078 |
| 4303 | 1079 @implementer(iwokkel.IDisco) |
| 1080 class EmailGatewayHandler(XMPPHandler): | |
| 1081 | |
| 1082 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): | |
| 1083 return [] | |
| 1084 | |
| 1085 def getDiscoItems(self, requestor, target, nodeIdentifier=""): | |
| 1086 return [] |