libervia-backend: libervia/backend/plugins/plugin_xep

annotate libervia/backend/plugins/plugin_xep_0448.py @ 4307:6a0155f410bd

test (unit): add test for plugin XEP-0033: those replace the legacy XEP-0033 test from libervia/backend/test/test_plugin_xep_0033.py. rel 450

author	Goffi <goffi@goffi.org>
date	Thu, 26 Sep 2024 16:12:01 +0200
parents	0d7bb4df2343
children

rev	line source
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	1 #!/usr/bin/env python3
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	2
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	3 # Libervia plugin for handling stateless file sharing encryption
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	4 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	5
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	6 # This program is free software: you can redistribute it and/or modify
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	7 # it under the terms of the GNU Affero General Public License as published by
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	8 # the Free Software Foundation, either version 3 of the License, or
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	9 # (at your option) any later version.
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	10
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	11 # This program is distributed in the hope that it will be useful,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	14 # GNU Affero General Public License for more details.
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	15
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	16 # You should have received a copy of the GNU Affero General Public License
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	18
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	19 import base64
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	20 from functools import partial
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	21 from pathlib import Path
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	22 import secrets
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	23 from textwrap import dedent
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	24 from typing import Any, Dict, Optional, Tuple, Union
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	25
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	26 from cryptography.exceptions import AlreadyFinalized
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	27 from cryptography.hazmat import backends
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	28 from cryptography.hazmat.primitives import ciphers
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	29 from cryptography.hazmat.primitives.ciphers import CipherContext, modes
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	30 from cryptography.hazmat.primitives.padding import PKCS7, PaddingContext
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	31 import treq
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	32 from twisted.internet import defer
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	33 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	34 from twisted.words.xish import domish
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	35 from wokkel import disco, iwokkel
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	36 from zope.interface import implementer
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	37
4071 4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4037 diff changeset	38 from libervia.backend.core import exceptions
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4037 diff changeset	39 from libervia.backend.core.constants import Const as C
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4037 diff changeset	40 from libervia.backend.core.core_types import SatXMPPEntity
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4037 diff changeset	41 from libervia.backend.core.i18n import _
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4037 diff changeset	42 from libervia.backend.core.log import getLogger
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4037 diff changeset	43 from libervia.backend.tools import stream
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4037 diff changeset	44 from libervia.backend.tools.web import treq_client_no_ssl
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	45
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	46 log = getLogger(__name__)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	47
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	48 IMPORT_NAME = "XEP-0448"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	49
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	50 PLUGIN_INFO = {
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	51 C.PI_NAME: "Encryption for Stateless File Sharing",
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	52 C.PI_IMPORT_NAME: IMPORT_NAME,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	53 C.PI_TYPE: C.PLUG_TYPE_EXP,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	54 C.PI_PROTOCOLS: ["XEP-0448"],
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	55 C.PI_DEPENDENCIES: [
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	56 "XEP-0103",
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	57 "XEP-0300",
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	58 "XEP-0334",
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	59 "XEP-0363",
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	60 "XEP-0384",
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	61 "XEP-0447",
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	62 "DOWNLOAD",
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	63 "ATTACH",
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	64 ],
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	65 C.PI_MAIN: "XEP_0448",
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	66 C.PI_HANDLER: "yes",
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	67 C.PI_DESCRIPTION: dedent(
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	68 _(
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	69 """\
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	70 Implementation of e2e encryption for media sharing
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	71 """
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	72 )
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	73 ),
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	74 }
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	75
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	76 NS_ESFS = "urn:xmpp:esfs:0"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	77 NS_AES_128_GCM = "urn:xmpp:ciphers:aes-128-gcm-nopadding:0"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	78 NS_AES_256_GCM = "urn:xmpp:ciphers:aes-256-gcm-nopadding:0"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	79 NS_AES_256_CBC = "urn:xmpp:ciphers:aes-256-cbc-pkcs7:0"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	80
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	81
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	82 class XEP_0448:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	83
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	84 def __init__(self, host):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	85 self.host = host
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	86 log.info(_("XEP_0448 plugin initialization"))
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	87 host.register_namespace("esfs", NS_ESFS)
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	88 self._u = host.plugins["XEP-0103"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	89 self._h = host.plugins["XEP-0300"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	90 self._hints = host.plugins["XEP-0334"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	91 self._http_upload = host.plugins["XEP-0363"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	92 self._o = host.plugins["XEP-0384"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	93 self._sfs = host.plugins["XEP-0447"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	94 self._sfs.register_source_handler(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	95 NS_ESFS, "encrypted", self.parse_encrypted_elt, encrypted=True
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	96 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	97 self._attach = host.plugins["ATTACH"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	98 self._attach.register(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	99 self.can_handle_attachment, self.attach, encrypted=True, priority=1000
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	100 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	101 host.plugins["DOWNLOAD"].register_download_handler(NS_ESFS, self.download)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	102 host.trigger.add("XEP-0363_upload_pre_slot", self._upload_pre_slot)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	103 host.trigger.add("XEP-0363_upload", self._upload_trigger)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	104
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	105 def get_handler(self, client):
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	106 return XEP0448Handler()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	107
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	108 def parse_encrypted_elt(self, encrypted_elt: domish.Element) -> Dict[str, Any]:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	109 """Parse an <encrypted> element and return corresponding source data
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	110
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	111 @param encrypted_elt: element to parse
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	112 @raise exceptions.DataError: the element is invalid
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	113
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	114 """
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	115 sources = self._sfs.parse_sources_elt(encrypted_elt)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	116 if not sources:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	117 raise exceptions.NotFound("sources are missing in {encrypted_elt.toXml()}")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	118 if len(sources) > 1:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	119 log.debug(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	120 "more that one sources has been found, this is not expected, only the "
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	121 "first one will be used"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	122 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	123 source = sources[0]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	124 source["type"] = NS_ESFS
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	125 try:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	126 encrypted_data = source["encrypted_data"] = {
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	127 "cipher": encrypted_elt["cipher"],
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	128 "key": str(next(encrypted_elt.elements(NS_ESFS, "key"))),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	129 "iv": str(next(encrypted_elt.elements(NS_ESFS, "iv"))),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	130 }
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	131 except (KeyError, StopIteration):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	132 raise exceptions.DataError(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	133 "invalid <encrypted/> element: {encrypted_elt.toXml()}"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	134 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	135 try:
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	136 hash_algo, hash_value = self._h.parse_hash_elt(encrypted_elt)
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	137 except exceptions.NotFound:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	138 pass
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	139 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	140 encrypted_data["hash_algo"] = hash_algo
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	141 encrypted_data["hash"] = base64.b64encode(hash_value.encode()).decode()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	142 return source
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	143
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	144 async def download(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	145 self,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	146 client: SatXMPPEntity,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	147 attachment: Dict[str, Any],
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	148 source: Dict[str, Any],
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	149 dest_path: Union[Path, str],
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	150 extra: Optional[Dict[str, Any]] = None,
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	151 ) -> Tuple[str, defer.Deferred]:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	152 # TODO: check hash
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	153 if extra is None:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	154 extra = {}
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	155 try:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	156 encrypted_data = source["encrypted_data"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	157 cipher = encrypted_data["cipher"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	158 iv = base64.b64decode(encrypted_data["iv"])
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	159 key = base64.b64decode(encrypted_data["key"])
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	160 except KeyError as e:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	161 raise ValueError(f"{source} has incomplete encryption data: {e}")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	162 try:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	163 download_url = source["url"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	164 except KeyError:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	165 raise ValueError(f"{source} has missing URL")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	166
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	167 if extra.get("ignore_tls_errors", False):
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	168 log.warning("TLS certificate check disabled, this is highly insecure")
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	169 treq_client = treq_client_no_ssl
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	170 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	171 treq_client = treq
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	172
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	173 try:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	174 file_size = int(attachment["size"])
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	175 except (KeyError, ValueError):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	176 head_data = await treq_client.head(download_url)
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	177 content_length = int(head_data.headers.getRawHeaders("content-length")[0])
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	178 # the 128 bits tag is put at the end
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	179 file_size = content_length - 16
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	180
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	181 file_obj = stream.SatFile(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	182 self.host,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	183 client,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	184 dest_path,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	185 mode="wb",
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	186 size=file_size,
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	187 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	188
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	189 if cipher in (NS_AES_128_GCM, NS_AES_256_GCM):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	190 decryptor = ciphers.Cipher(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	191 ciphers.algorithms.AES(key),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	192 modes.GCM(iv),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	193 backend=backends.default_backend(),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	194 ).decryptor()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	195 decrypt_cb = partial(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	196 self.gcm_decrypt,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	197 client=client,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	198 file_obj=file_obj,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	199 decryptor=decryptor,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	200 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	201 finalize_cb = None
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	202 elif cipher == NS_AES_256_CBC:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	203 cipher_algo = ciphers.algorithms.AES(key)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	204 decryptor = ciphers.Cipher(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	205 cipher_algo,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	206 modes.CBC(iv),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	207 backend=backends.default_backend(),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	208 ).decryptor()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	209 unpadder = PKCS7(cipher_algo.block_size).unpadder()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	210 decrypt_cb = partial(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	211 self.cbc_decrypt,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	212 client=client,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	213 file_obj=file_obj,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	214 decryptor=decryptor,
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	215 unpadder=unpadder,
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	216 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	217 finalize_cb = partial(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	218 self.cbc_decrypt_finalize,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	219 file_obj=file_obj,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	220 decryptor=decryptor,
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	221 unpadder=unpadder,
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	222 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	223 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	224 msg = f"cipher {cipher!r} is not supported"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	225 file_obj.close(error=msg)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	226 log.warning(msg)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	227 raise exceptions.CancelError(msg)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	228
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	229 progress_id = file_obj.uid
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	230
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	231 resp = await treq_client.get(download_url, unbuffered=True)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	232 if resp.code == 200:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	233 d = treq.collect(resp, partial(decrypt_cb))
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	234 if finalize_cb is not None:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	235 d.addCallback(lambda __: finalize_cb())
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	236 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	237 d = defer.Deferred()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	238 self.host.plugins["DOWNLOAD"].errback_download(file_obj, d, resp)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	239 return progress_id, d
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	240
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	241 async def can_handle_attachment(self, client, data):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	242 # FIXME: check if SCE is supported without checking which e2ee algo is used
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	243 if client.encryption.get_namespace(data["to"]) != self._o.NS_TWOMEMO:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	244 # we need SCE, and it is currently supported only by TWOMEMO, thus we can't
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	245 # handle the attachment if it's not activated
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	246 return False
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	247 try:
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	248 await self._http_upload.get_http_upload_entity(client)
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	249 except exceptions.NotFound:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	250 return False
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	251 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	252 return True
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	253
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	254 async def _upload_cb(self, client, filepath, filename, extra):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	255 attachment = extra["attachment"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	256 extra["encryption"] = IMPORT_NAME
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	257 attachment["encryption_data"] = extra["encryption_data"] = {
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	258 "algorithm": C.ENC_AES_GCM,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	259 "iv": secrets.token_bytes(12),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	260 "key": secrets.token_bytes(32),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	261 }
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	262 attachment["filename"] = filename
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	263 return await self._http_upload.file_http_upload(
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	264 client=client, filepath=filepath, filename="encrypted", extra=extra
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	265 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	266
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	267 async def attach(self, client, data):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	268 # XXX: for now, XEP-0447/XEP-0448 only allow to send one file per <message/>, thus
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	269 # we need to send each file in a separate message, in the same way as for
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	270 # plugin_sec_aesgcm.
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3934 diff changeset	271 attachments = data["extra"][C.KEY_ATTACHMENTS]
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	272 if not data["message"] or data["message"] == {"": ""}:
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	273 extra_attachments = attachments[1:]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	274 del attachments[1:]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	275 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	276 # we have a message, we must send first attachment separately
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	277 extra_attachments = attachments[:]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	278 attachments.clear()
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3934 diff changeset	279 del data["extra"][C.KEY_ATTACHMENTS]
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	280
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	281 if attachments:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	282 if len(attachments) > 1:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	283 raise exceptions.InternalError(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	284 "There should not be more that one attachment at this point"
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	285 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	286 await self._attach.upload_files(client, data, upload_cb=self._upload_cb)
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	287 self._hints.add_hint_elements(data["xml"], [self._hints.HINT_STORE])
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	288 for attachment in attachments:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	289 encryption_data = attachment.pop("encryption_data")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	290 file_hash = (attachment["hash_algo"], attachment["hash"])
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	291 file_sharing_elt = self._sfs.get_file_sharing_elt(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	292 [],
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	293 name=attachment["filename"],
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	294 size=attachment["size"],
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	295 file_hash=file_hash,
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	296 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	297 encrypted_elt = file_sharing_elt.sources.addElement(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	298 (NS_ESFS, "encrypted")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	299 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	300 encrypted_elt["cipher"] = NS_AES_256_GCM
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	301 encrypted_elt.addElement(
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	302 "key", content=base64.b64encode(encryption_data["key"]).decode()
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	303 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	304 encrypted_elt.addElement(
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	305 "iv", content=base64.b64encode(encryption_data["iv"]).decode()
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	306 )
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	307 encrypted_elt.addChild(
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	308 self._h.build_hash_elt(
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	309 attachment["encrypted_hash"], attachment["encrypted_hash_algo"]
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	310 )
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	311 )
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	312 encrypted_elt.addChild(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	313 self._sfs.get_sources_elt(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	314 [self._u.get_url_data_elt(attachment["url"])]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	315 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	316 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	317 data["xml"].addChild(file_sharing_elt)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	318
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	319 for attachment in extra_attachments:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	320 # we send all remaining attachment in a separate message
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	321 await client.sendMessage(
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	322 to_jid=data["to"],
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	323 message={"": ""},
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	324 subject=data["subject"],
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	325 mess_type=data["type"],
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3934 diff changeset	326 extra={C.KEY_ATTACHMENTS: [attachment]},
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	327 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	328
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	329 if (
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	330 not data["extra"]
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	331 and (not data["message"] or data["message"] == {"": ""})
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	332 and not data["subject"]
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	333 ):
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	334 # nothing left to send, we can cancel the message
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	335 raise exceptions.CancelError("Cancelled by XEP_0448 attachment handling")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	336
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	337 def gcm_decrypt(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	338 self,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	339 data: bytes,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	340 client: SatXMPPEntity,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	341 file_obj: stream.SatFile,
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	342 decryptor: CipherContext,
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	343 ) -> None:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	344 if file_obj.tell() + len(data) > file_obj.size: # type: ignore
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	345 # we're reaching end of file with this bunch of data
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	346 # we may still have a last bunch if the tag is incomplete
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	347 bytes_left = file_obj.size - file_obj.tell() # type: ignore
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	348 if bytes_left > 0:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	349 decrypted = decryptor.update(data[:bytes_left])
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	350 file_obj.write(decrypted)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	351 tag = data[bytes_left:]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	352 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	353 tag = data
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	354 if len(tag) < 16:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	355 # the tag is incomplete, either we'll get the rest in next data bunch
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	356 # or we have already the other part from last bunch of data
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	357 try:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	358 # we store partial tag in decryptor._sat_tag
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	359 tag = decryptor._sat_tag + tag
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	360 except AttributeError:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	361 # no other part, we'll get the rest at next bunch
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	362 decryptor.sat_tag = tag
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	363 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	364 # we have the complete tag, it must be 128 bits
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	365 if len(tag) != 16:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	366 raise ValueError(f"Invalid tag: {tag}")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	367 remain = decryptor.finalize_with_tag(tag)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	368 file_obj.write(remain)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	369 file_obj.close()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	370 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	371 decrypted = decryptor.update(data)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	372 file_obj.write(decrypted)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	373
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	374 def cbc_decrypt(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	375 self,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	376 data: bytes,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	377 client: SatXMPPEntity,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	378 file_obj: stream.SatFile,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	379 decryptor: CipherContext,
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	380 unpadder: PaddingContext,
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	381 ) -> None:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	382 decrypted = decryptor.update(data)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	383 file_obj.write(unpadder.update(decrypted))
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	384
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	385 def cbc_decrypt_finalize(
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	386 self, file_obj: stream.SatFile, decryptor: CipherContext, unpadder: PaddingContext
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	387 ) -> None:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	388 decrypted = decryptor.finalize()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	389 file_obj.write(unpadder.update(decrypted))
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	390 file_obj.write(unpadder.finalize())
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	391 file_obj.close()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	392
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	393 def _upload_pre_slot(self, client, extra, file_metadata):
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	394 if extra.get("encryption") != IMPORT_NAME:
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	395 return True
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	396 # the tag is appended to the file
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	397 file_metadata["size"] += 16
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	398 return True
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	399
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	400 def _encrypt(self, data: bytes, encryptor: CipherContext, attachment: dict) -> bytes:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	401 if data:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	402 attachment["hasher"].update(data)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	403 ret = encryptor.update(data)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	404 attachment["encrypted_hasher"].update(ret)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	405 return ret
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	406 else:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	407 try:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	408 # end of file is reached, me must finalize
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	409 fin = encryptor.finalize()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	410 tag = encryptor.tag
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	411 ret = fin + tag
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	412 hasher = attachment.pop("hasher")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	413 attachment["hash"] = hasher.hexdigest()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	414 encrypted_hasher = attachment.pop("encrypted_hasher")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	415 encrypted_hasher.update(ret)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	416 attachment["encrypted_hash"] = encrypted_hasher.hexdigest()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	417 return ret
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	418 except AlreadyFinalized:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	419 # as we have already finalized, we can now send EOF
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	420 return b""
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	421
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	422 def _upload_trigger(self, client, extra, sat_file, file_producer, slot):
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	423 if extra.get("encryption") != IMPORT_NAME:
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	424 return True
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	425 attachment = extra["attachment"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	426 encryption_data = extra["encryption_data"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	427 log.debug("encrypting file with AES-GCM")
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	428 iv = encryption_data["iv"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	429 key = encryption_data["key"]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	430
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	431 # encrypted data size will be bigger than original file size
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	432 # so we need to check with final data length to avoid a warning on close()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	433 sat_file.check_size_with_read = True
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	434
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	435 # file_producer get length directly from file, and this cause trouble as
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	436 # we have to change the size because of encryption. So we adapt it here,
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	437 # else the producer would stop reading prematurely
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	438 file_producer.length = sat_file.size
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	439
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	440 encryptor = ciphers.Cipher(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	441 ciphers.algorithms.AES(key),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	442 modes.GCM(iv),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	443 backend=backends.default_backend(),
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	444 ).encryptor()
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	445
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	446 if sat_file.data_cb is not None:
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	447 raise exceptions.InternalError(
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	448 f"data_cb was expected to be None, it is set to {sat_file.data_cb}"
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	449 )
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	450
4270 0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	451 attachment.update(
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	452 {
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	453 "hash_algo": self._h.ALGO_DEFAULT,
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	454 "hasher": self._h.get_hasher(),
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	455 "encrypted_hash_algo": self._h.ALGO_DEFAULT,
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	456 "encrypted_hasher": self._h.get_hasher(),
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	457 }
0d7bb4df2343 Reformatted code base using black. Goffi <goffi@goffi.org> parents: 4071 diff changeset	458 )
3927 328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	459
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	460 # with data_cb we encrypt the file on the fly
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	461 sat_file.data_cb = partial(
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	462 self._encrypt, encryptor=encryptor, attachment=attachment
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	463 )
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	464 return True
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	465
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	466
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	467 @implementer(iwokkel.IDisco)
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	468 class XEP0448Handler(XMPPHandler):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	469
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	470 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	471 return [disco.DiscoFeature(NS_ESFS)]
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	472
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	473 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
328869756cf4 plugin XEP-0448: Encryption for stateless file sharing implementation: Goffi <goffi@goffi.org> parents: diff changeset	474 return []

Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0448.py @ 4307:6a0155f410bd