libervia-backend: sat/plugins/plugin_xep

annotate sat/plugins/plugin_xep_0420.py @ 3888:aa7197b67c26

component AP gateway: AP <=> XMPP reactions conversions: - Pubsub Attachments plugin has been renamed to XEP-0470 following publication - XEP-0470 has been updated to follow 0.2 changes - AP reactions (as implemented in Pleroma) are converted to XEP-0470 - XEP-0470 events are converted to AP reactions (again, using "EmojiReact" from Pleroma) - AP activities related to attachments (like/reactions) are cached in Libervia because it's not possible to retrieve them from Pleroma instances once they have been emitted (doing an HTTP get on their ID returns a 404). For now those cache are not flushed, this should be improved in the future. - `sharedInbox` is used when available. Pleroma returns a 500 HTTP error when ``to`` or ``cc`` are used in a direct inbox. - reactions and like are not currently used for direct messages, because they can't be emitted from Pleroma in this case, thus there is no point in implementing them for the moment. rel 371

author	Goffi <goffi@goffi.org>
date	Wed, 31 Aug 2022 17:07:03 +0200
parents	00212260f659
children	8289ac1b34f4

rev	line source
3877 00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	1 #!/usr/bin/env python3
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	2
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	3 # Libervia plugin for Stanza Content Encryption
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	4 # Copyright (C) 2022-2022 Tim Henkes (me@syndace.dev)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	5
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	6 # This program is free software: you can redistribute it and/or modify
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	7 # it under the terms of the GNU Affero General Public License as published by
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	8 # the Free Software Foundation, either version 3 of the License, or
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	9 # (at your option) any later version.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	10
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	11 # This program is distributed in the hope that it will be useful,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	14 # GNU Affero General Public License for more details.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	15
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	16 # You should have received a copy of the GNU Affero General Public License
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	18
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	19 # Type-check with `mypy --strict --disable-error-code no-untyped-call`
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	20 # Lint with `pylint`
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	21
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	22 from abc import ABC, abstractmethod
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	23 from datetime import datetime
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	24 import enum
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	25 import secrets
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	26 import string
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	27 from typing import Dict, Iterator, List, NamedTuple, Optional, Set, Tuple, Union, cast
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	28
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	29 from lxml import etree
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	30
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	31 from sat.core.constants import Const as C
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	32 from sat.core.i18n import D_
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	33 from sat.core.log import Logger, getLogger
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	34 from sat.core.sat_main import SAT
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	35 from sat.tools.xml_tools import ElementParser
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	36 from sat.plugins.plugin_xep_0033 import NS_ADDRESS
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	37 from sat.plugins.plugin_xep_0082 import XEP_0082
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	38 from sat.plugins.plugin_xep_0334 import NS_HINTS
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	39 from sat.plugins.plugin_xep_0359 import NS_SID
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	40 from sat.plugins.plugin_xep_0380 import NS_EME
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	41 from twisted.words.protocols.jabber import jid
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	42 from twisted.words.xish import domish
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	43
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	44
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	45 __all__ = [ # pylint: disable=unused-variable
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	46 "PLUGIN_INFO",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	47 "NS_SCE",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	48 "XEP_0420",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	49 "ProfileRequirementsNotMet",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	50 "AffixVerificationFailed",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	51 "SCECustomAffix",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	52 "SCEAffixPolicy",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	53 "SCEProfile",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	54 "SCEAffixValues"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	55 ]
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	56
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	57
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	58 log = cast(Logger, getLogger(__name__))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	59
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	60
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	61 PLUGIN_INFO = {
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	62 C.PI_NAME: "SCE",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	63 C.PI_IMPORT_NAME: "XEP-0420",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	64 C.PI_TYPE: "SEC",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	65 C.PI_PROTOCOLS: [ "XEP-0420" ],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	66 C.PI_DEPENDENCIES: [ "XEP-0334", "XEP-0082" ],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	67 C.PI_RECOMMENDATIONS: [ "XEP-0045", "XEP-0033", "XEP-0359" ],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	68 C.PI_MAIN: "XEP_0420",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	69 C.PI_HANDLER: "no",
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	70 C.PI_DESCRIPTION: D_("Implementation of Stanza Content Encryption"),
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	71 }
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	72
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	73
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	74 NS_SCE = "urn:xmpp:sce:1"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	75
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	76
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	77 class ProfileRequirementsNotMet(Exception):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	78 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	79 Raised by :meth:`XEP_0420.unpack_stanza` in case the requirements formulated by the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	80 profile are not met.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	81 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	82
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	83
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	84 class AffixVerificationFailed(Exception):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	85 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	86 Raised by :meth:`XEP_0420.unpack_stanza` in case of affix verification failure.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	87 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	88
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	89
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	90 class SCECustomAffix(ABC):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	91 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	92 Interface for custom affixes of SCE profiles.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	93 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	94
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	95 @property
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	96 @abstractmethod
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	97 def element_name(self) -> str:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	98 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	99 @return: The name of the affix's XML element.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	100 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	101
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	102 @property
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	103 @abstractmethod
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	104 def element_schema(self) -> str:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	105 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	106 @return: The XML schema definition of the affix element's XML structure, i.e. the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	107 ``<xs:element/>`` schema element. This element will be referenced using
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	108 ``<xs:element ref="{element_name}"/>``.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	109 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	110
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	111 @abstractmethod
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	112 def create(self, stanza: domish.Element) -> domish.Element:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	113 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	114 @param stanza: The stanza element which has been processed by
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	115 :meth:`XEP_0420.pack_stanza`, i.e. all encryptable children have been removed
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	116 and only the root ``<message/>`` or ``<iq/>`` and unencryptable children
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	117 remain. Do not modify.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	118 @return: An affix element to include in the envelope. The element must have the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	119 name :attr:`element_name` and must validate using :attr:`element_schema`.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	120 @raise ValueError: if the affix couldn't be built.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	121 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	122
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	123 @abstractmethod
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	124 def verify(self, stanza: domish.Element, element: domish.Element) -> None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	125 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	126 @param stanza: The stanza element before being processed by
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	127 :meth:`XEP_0420.unpack_stanza`, i.e. all encryptable children have been
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	128 removed and only the root ``<message/>`` or ``<iq/>`` and unencryptable
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	129 children remain. Do not modify.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	130 @param element: The affix element to verify.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	131 @raise AffixVerificationFailed: on verification failure.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	132 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	133
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	134
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	135 @enum.unique
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	136 class SCEAffixPolicy(enum.Enum):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	137 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	138 Policy for the presence of an affix in an SCE envelope.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	139 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	140
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	141 REQUIRED: str = "REQUIRED"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	142 OPTIONAL: str = "OPTIONAL"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	143 NOT_NEEDED: str = "NOT_NEEDED"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	144
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	145
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	146 class SCEProfile(NamedTuple):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	147 # pylint: disable=invalid-name
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	148 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	149 An SCE profile, i.e. the definition which affixes are required, optional or not needed
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	150 at all by an SCE-enabled encryption protocol.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	151 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	152
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	153 rpad_policy: SCEAffixPolicy
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	154 time_policy: SCEAffixPolicy
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	155 to_policy: SCEAffixPolicy
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	156 from_policy: SCEAffixPolicy
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	157 custom_policies: Dict[SCECustomAffix, SCEAffixPolicy]
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	158
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	159
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	160 class SCEAffixValues(NamedTuple):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	161 # pylint: disable=invalid-name
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	162 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	163 Structure returned by :meth:`XEP_0420.unpack_stanza` with the parsed/processes values
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	164 of all affixes included in the envelope. For custom affixes, the whole affix element
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	165 is returned.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	166 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	167
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	168 rpad: Optional[str]
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	169 timestamp: Optional[datetime]
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	170 recipient: Optional[jid.JID]
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	171 sender: Optional[jid.JID]
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	172 custom: Dict[SCECustomAffix, domish.Element]
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	173
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	174
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	175 ENVELOPE_SCHEMA = """<?xml version="1.0" encoding="utf8"?>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	176 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	177 targetNamespace="urn:xmpp:sce:1"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	178 xmlns="urn:xmpp:sce:1">
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	179
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	180 <xs:element name="envelope">
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	181 <xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	182 <xs:all>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	183 <xs:element ref="content"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	184 <xs:element ref="rpad" minOccurs="0"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	185 <xs:element ref="time" minOccurs="0"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	186 <xs:element ref="to" minOccurs="0"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	187 <xs:element ref="from" minOccurs="0"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	188 {custom_affix_references}
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	189 </xs:all>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	190 </xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	191 </xs:element>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	192
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	193 <xs:element name="content">
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	194 <xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	195 <xs:sequence>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	196 <xs:any minOccurs="0" maxOccurs="unbounded" processContents="skip"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	197 </xs:sequence>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	198 </xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	199 </xs:element>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	200
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	201 <xs:element name="rpad" type="xs:string"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	202
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	203 <xs:element name="time">
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	204 <xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	205 <xs:attribute name="stamp" type="xs:dateTime"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	206 </xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	207 </xs:element>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	208
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	209 <xs:element name="to">
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	210 <xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	211 <xs:attribute name="jid" type="xs:string"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	212 </xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	213 </xs:element>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	214
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	215 <xs:element name="from">
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	216 <xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	217 <xs:attribute name="jid" type="xs:string"/>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	218 </xs:complexType>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	219 </xs:element>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	220
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	221 {custom_affix_definitions}
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	222 </xs:schema>
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	223 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	224
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	225
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	226 class XEP_0420: # pylint: disable=invalid-name
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	227 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	228 Implementation of XEP-0420: Stanza Content Encryption under namespace
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	229 ``urn:xmpp:sce:1``.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	230
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	231 This is a passive plugin, i.e. it doesn't hook into any triggers to process stanzas
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	232 actively, but offers API for other plugins to use.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	233 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	234
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	235 # Set of namespaces whose elements are never allowed to be transferred in an encrypted
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	236 # envelope.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	237 MUST_BE_PLAINTEXT_NAMESPACES: Set[str] = {
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	238 NS_HINTS,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	239 NS_SID, # TODO: Not sure whether this ban applies to both stanza-id and origin-id
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	240 NS_ADDRESS,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	241 # Not part of the specification (yet), but just doesn't make sense in an encrypted
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	242 # envelope:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	243 NS_EME
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	244 }
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	245
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	246 # Set of (namespace, element name) tuples that define elements which are never allowed
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	247 # to be transferred in an encrypted envelope. If all elements under a certain
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	248 # namespace are forbidden, the namespace can be added to
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	249 # :attr:`MUST_BE_PLAINTEXT_NAMESPACES` instead.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	250 # Note: only full namespaces are forbidden by the spec for now, the following is for
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	251 # potential future use.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	252 MUST_BE_PLAINTEXT_ELEMENTS: Set[Tuple[str, str]] = set()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	253
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	254 def __init__(self, sat: SAT) -> None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	255 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	256 @param sat: The SAT instance.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	257 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	258
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	259 @staticmethod
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	260 def pack_stanza(profile: SCEProfile, stanza: domish.Element) -> bytes:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	261 """Pack a stanza according to Stanza Content Encryption.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	262
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	263 Removes all elements from the stanza except for a few exceptions that explicitly
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	264 need to be transferred in plaintext, e.g. because they contain hints/instructions
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	265 for the server on how to process the stanza. Together with the affix elements as
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	266 requested by the profile, the removed elements are added to an envelope XML
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	267 structure that builds the plaintext to be encrypted by the SCE-enabled encryption
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	268 scheme. Optional affixes are always added to the structure, i.e. they are treated
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	269 by the packing code as if they were required.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	270
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	271 Once built, the envelope structure is serialized to a byte string and returned for
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	272 the encryption scheme to encrypt and add to the stanza.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	273
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	274 @param profile: The SCE profile, i.e. the definition of affixes to include in the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	275 envelope.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	276 @param stanza: The stanza to process. Will be modified by the call.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	277 @return: The serialized envelope structure that builds the plaintext for the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	278 encryption scheme to process.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	279 @raise ValueError: if the <to/> or <from/> affixes are requested but the stanza
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	280 doesn't have the "to"/"from" attribute set to extract the value from. Can also
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	281 be raised by custom affixes.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	282
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	283 @warning: It is up to the calling code to add a <store/> message processing hint
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	284 if applicable.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	285 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	286
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	287 # Prepare the envelope and content elements
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	288 envelope = domish.Element((NS_SCE, "envelope"))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	289 content = envelope.addElement((NS_SCE, "content"))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	290
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	291 # Note the serialized byte size of the content element before adding any children
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	292 empty_content_byte_size = len(content.toXml().encode("utf-8"))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	293
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	294 # Just for type safety
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	295 stanza_children = cast(List[Union[domish.Element, str]], stanza.children)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	296 content_children = cast(List[Union[domish.Element, str]], content.children)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	297
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	298 # Move elements that are not explicitly forbidden from being encrypted from the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	299 # stanza to the content element.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	300 for child in list(cast(Iterator[domish.Element], stanza.elements())):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	301 if (
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	302 child.uri not in XEP_0420.MUST_BE_PLAINTEXT_NAMESPACES
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	303 and (child.uri, child.name) not in XEP_0420.MUST_BE_PLAINTEXT_ELEMENTS
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	304 ):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	305 # Remove the child from the stanza
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	306 stanza_children.remove(child)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	307
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	308 # A namespace of ``None`` can be used on domish elements to inherit the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	309 # namespace from the parent. When moving elements from the stanza root to
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	310 # the content element, however, we don't want elements to inherit the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	311 # namespace of the content element. Thus, check for elements with ``None``
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	312 # for their namespace and set the namespace to jabber:client, which is the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	313 # namespace of the parent element.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	314 if child.uri is None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	315 child.uri = C.NS_CLIENT
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	316 child.defaultUri = C.NS_CLIENT
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	317
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	318 # Add the child with corrected namespaces to the content element
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	319 content_children.append(child)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	320
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	321 # Add the affixes requested by the profile
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	322 if profile.rpad_policy is not SCEAffixPolicy.NOT_NEEDED:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	323 # The specification defines the rpad affix to contain "[...] a randomly
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	324 # generated sequence of random length between 0 and 200 characters." This
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	325 # implementation differs a bit from the specification in that a minimum size
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	326 # other than 0 is chosen depending on the serialized size of the content
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	327 # element. This is to prevent the scenario where the encrypted content is
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	328 # short and the rpad is also randomly chosen to be short, which could allow
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	329 # guessing the content of a short message. To do so, the rpad length is first
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	330 # chosen to pad the content to at least 53 bytes, then afterwards another 0 to
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	331 # 200 bytes are added. Note that single-byte characters are used by this
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	332 # implementation, thus the number of characters equals the number of bytes.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	333 content_byte_size = len(content.toXml().encode("utf-8"))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	334 content_byte_size_diff = content_byte_size - empty_content_byte_size
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	335 rpad_length = max(0, 53 - content_byte_size_diff) + secrets.randbelow(201)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	336 rpad_content = "".join(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	337 secrets.choice(string.digits + string.ascii_letters + string.punctuation)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	338 for __
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	339 in range(rpad_length)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	340 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	341 envelope.addElement((NS_SCE, "rpad"), content=rpad_content)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	342
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	343 if profile.time_policy is not SCEAffixPolicy.NOT_NEEDED:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	344 time_element = envelope.addElement((NS_SCE, "time"))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	345 time_element["stamp"] = XEP_0082.format_datetime()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	346
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	347 if profile.to_policy is not SCEAffixPolicy.NOT_NEEDED:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	348 recipient = cast(Optional[str], stanza.getAttribute("to", None))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	349 if recipient is None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	350 raise ValueError(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	351 "<to/> affix requested, but stanza doesn't have the 'to' attribute"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	352 " set."
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	353 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	354
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	355 to_element = envelope.addElement((NS_SCE, "to"))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	356 to_element["jid"] = jid.JID(recipient).userhost()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	357
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	358 if profile.from_policy is not SCEAffixPolicy.NOT_NEEDED:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	359 sender = cast(Optional[str], stanza.getAttribute("from", None))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	360 if sender is None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	361 raise ValueError(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	362 "<from/> affix requested, but stanza doesn't have the 'from'"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	363 " attribute set."
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	364 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	365
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	366 from_element = envelope.addElement((NS_SCE, "from"))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	367 from_element["jid"] = jid.JID(sender).userhost()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	368
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	369 for affix, policy in profile.custom_policies.items():
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	370 if policy is not SCEAffixPolicy.NOT_NEEDED:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	371 envelope.addChild(affix.create(stanza))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	372
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	373 return cast(str, envelope.toXml()).encode("utf-8")
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	374
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	375 @staticmethod
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	376 def unpack_stanza(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	377 profile: SCEProfile,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	378 stanza: domish.Element,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	379 envelope_serialized: bytes
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	380 ) -> SCEAffixValues:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	381 """Unpack a stanza packed according to Stanza Content Encryption.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	382
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	383 Parses the serialized envelope as XML, verifies included affixes and makes sure
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	384 the requirements of the profile are met, and restores the stanza by moving
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	385 decrypted elements from the envelope back to the stanza top level.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	386
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	387 @param profile: The SCE profile, i.e. the definition of affixes that have to/may
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	388 be included in the envelope.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	389 @param stanza: The stanza to process. Will be modified by the call.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	390 @param envelope_serialized: The serialized envelope, i.e. the plaintext produced
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	391 by the decryption scheme utilizing SCE.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	392 @return: The parsed and processed values of all affixes that were present on the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	393 envelope, notably including the timestamp.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	394 @raise ValueError: if the serialized envelope element is malformed.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	395 @raise ProfileRequirementsNotMet: if one or more affixes required by the profile
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	396 are missing from the envelope.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	397 @raise AffixVerificationFailed: if an affix included in the envelope fails to
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	398 validate. It doesn't matter whether the affix is required by the profile or
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	399 not, all affixes included in the envelope are validated and cause this
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	400 exception to be raised on failure.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	401
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	402 @warning: It is up to the calling code to verify the timestamp, if returned, since
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	403 the requirements on the timestamp may vary between SCE-enabled protocols.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	404 """
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	405
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	406 try:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	407 envelope_serialized_string = envelope_serialized.decode("utf-8")
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	408 except UnicodeError as e:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	409 raise ValueError("Serialized envelope can't bare parsed as utf-8.") from e
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	410
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	411 custom_affixes = set(profile.custom_policies.keys())
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	412
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	413 # Make sure the envelope adheres to the schema
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	414 parser = etree.XMLParser(schema=etree.XMLSchema(etree.XML(ENVELOPE_SCHEMA.format(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	415 custom_affix_references="".join(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	416 f'<xs:element ref="{custom_affix.element_name}" minOccurs="0"/>'
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	417 for custom_affix
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	418 in custom_affixes
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	419 ),
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	420 custom_affix_definitions="".join(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	421 custom_affix.element_schema
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	422 for custom_affix
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	423 in custom_affixes
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	424 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	425 ).encode("utf-8"))))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	426
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	427 try:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	428 etree.fromstring(envelope_serialized_string, parser)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	429 except etree.XMLSyntaxError as e:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	430 raise ValueError("Serialized envelope doesn't pass schema validation.") from e
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	431
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	432 # Prepare the envelope and content elements
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	433 envelope = cast(domish.Element, ElementParser()(envelope_serialized_string))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	434 content = cast(domish.Element, next(envelope.elements(NS_SCE, "content")))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	435
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	436 # Verify the affixes
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	437 rpad_element = cast(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	438 Optional[domish.Element],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	439 next(envelope.elements(NS_SCE, "rpad"), None)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	440 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	441 time_element = cast(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	442 Optional[domish.Element],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	443 next(envelope.elements(NS_SCE, "time"), None)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	444 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	445 to_element = cast(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	446 Optional[domish.Element],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	447 next(envelope.elements(NS_SCE, "to"), None)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	448 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	449 from_element = cast(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	450 Optional[domish.Element],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	451 next(envelope.elements(NS_SCE, "from"), None)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	452 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	453
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	454 # The rpad doesn't need verification.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	455 rpad_value = None if rpad_element is None else str(rpad_element)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	456
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	457 # The time affix isn't verified other than that the timestamp is parseable.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	458 try:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	459 timestamp_value = None if time_element is None else \
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	460 XEP_0082.parse_datetime(time_element["stamp"])
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	461 except ValueError as e:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	462 raise AffixVerificationFailed("Malformed time affix") from e
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	463
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	464 # The to affix is verified by comparing the to attribute of the stanza with the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	465 # JID referenced by the affix. Note that only bare JIDs are compared as per the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	466 # specification.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	467 recipient_value: Optional[jid.JID] = None
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	468 if to_element is not None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	469 recipient_value = jid.JID(to_element["jid"])
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	470
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	471 recipient_actual = cast(Optional[str], stanza.getAttribute("to", None))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	472 if recipient_actual is None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	473 raise AffixVerificationFailed(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	474 "'To' affix is included in the envelope, but the stanza is lacking a"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	475 " 'to' attribute to compare the value to."
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	476 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	477
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	478 recipient_actual_bare_jid = jid.JID(recipient_actual).userhost()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	479 recipient_target_bare_jid = recipient_value.userhost()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	480
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	481 if recipient_actual_bare_jid != recipient_target_bare_jid:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	482 raise AffixVerificationFailed(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	483 f"Mismatch between actual and target recipient bare JIDs:"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	484 f" {recipient_actual_bare_jid} vs {recipient_target_bare_jid}."
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	485 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	486
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	487 # The from affix is verified by comparing the from attribute of the stanza with
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	488 # the JID referenced by the affix. Note that only bare JIDs are compared as per
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	489 # the specification.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	490 sender_value: Optional[jid.JID] = None
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	491 if from_element is not None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	492 sender_value = jid.JID(from_element["jid"])
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	493
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	494 sender_actual = cast(Optional[str], stanza.getAttribute("from", None))
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	495 if sender_actual is None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	496 raise AffixVerificationFailed(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	497 "'From' affix is included in the envelope, but the stanza is lacking"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	498 " a 'from' attribute to compare the value to."
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	499 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	500
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	501 sender_actual_bare_jid = jid.JID(sender_actual).userhost()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	502 sender_target_bare_jid = sender_value.userhost()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	503
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	504 if sender_actual_bare_jid != sender_target_bare_jid:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	505 raise AffixVerificationFailed(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	506 f"Mismatch between actual and target sender bare JIDs:"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	507 f" {sender_actual_bare_jid} vs {sender_target_bare_jid}."
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	508 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	509
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	510 # Find and verify custom affixes
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	511 custom_values: Dict[SCECustomAffix, domish.Element] = {}
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	512 for affix in custom_affixes:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	513 element_name = affix.element_name
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	514 element = cast(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	515 Optional[domish.Element],
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	516 next(envelope.elements(NS_SCE, element_name), None)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	517 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	518 if element is not None:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	519 affix.verify(stanza, element)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	520 custom_values[affix] = element
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	521
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	522 # Check whether all affixes required by the profile are present
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	523 rpad_missing = \
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	524 profile.rpad_policy is SCEAffixPolicy.REQUIRED and rpad_element is None
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	525 time_missing = \
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	526 profile.time_policy is SCEAffixPolicy.REQUIRED and time_element is None
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	527 to_missing = \
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	528 profile.to_policy is SCEAffixPolicy.REQUIRED and to_element is None
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	529 from_missing = \
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	530 profile.from_policy is SCEAffixPolicy.REQUIRED and from_element is None
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	531 custom_missing = any(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	532 affix not in custom_values
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	533 for affix, policy
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	534 in profile.custom_policies.items()
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	535 if policy is SCEAffixPolicy.REQUIRED
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	536 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	537
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	538 if rpad_missing or time_missing or to_missing or from_missing or custom_missing:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	539 custom_missing_string = ""
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	540 for custom_affix in custom_affixes:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	541 value = "present" if custom_affix in custom_values else "missing"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	542 custom_missing_string += f", [custom]{custom_affix.element_name}={value}"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	543
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	544 raise ProfileRequirementsNotMet(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	545 f"SCE envelope is missing affixes required by the profile {profile}."
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	546 f" Affix presence:"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	547 f" rpad={'missing' if rpad_missing else 'present'}"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	548 f", time={'missing' if time_missing else 'present'}"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	549 f", to={'missing' if to_missing else 'present'}"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	550 f", from={'missing' if from_missing else 'present'}"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	551 + custom_missing_string
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	552 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	553
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	554 # Just for type safety
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	555 content_children = cast(List[Union[domish.Element, str]], content.children)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	556 stanza_children = cast(List[Union[domish.Element, str]], stanza.children)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	557
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	558 # Move elements that are not explicitly forbidden from being encrypted from the
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	559 # content element to the stanza.
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	560 for child in list(cast(Iterator[domish.Element], content.elements())):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	561 if (
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	562 child.uri in XEP_0420.MUST_BE_PLAINTEXT_NAMESPACES
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	563 or (child.uri, child.name) in XEP_0420.MUST_BE_PLAINTEXT_ELEMENTS
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	564 ):
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	565 log.warning(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	566 f"An element that MUST be transferred in plaintext was found in an"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	567 f" SCE envelope: {child.toXml()}"
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	568 )
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	569 else:
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	570 # Remove the child from the content element
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	571 content_children.remove(child)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	572
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	573 # Add the child to the stanza
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	574 stanza_children.append(child)
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	575
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	576 return SCEAffixValues(
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	577 rpad_value,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	578 timestamp_value,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	579 recipient_value,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	580 sender_value,
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	581 custom_values
00212260f659 plugin XEP-0420: Implementation of Stanza Content Encryption: Syndace <me@syndace.dev> parents: diff changeset	582 )

Mercurial > libervia-backend

annotate sat/plugins/plugin_xep_0420.py @ 3888:aa7197b67c26