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annotate libervia/backend/plugins/plugin_sec_autocrypt.py @ 4352:382dc6e62b6e default tip

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doc (components, encryption): add documentation on autocrypt for client and email gateway: fix 456
author Goffi <goffi@goffi.org>
date Fri, 28 Feb 2025 09:23:35 +0100
parents 6a0a081485b8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4351
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
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1 #!/usr/bin/env python3
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2
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3 # Libervia plugin
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4 # Copyright (C) 2009-2025 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 import base64
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20 from functools import partial
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21 from typing import TYPE_CHECKING, cast
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22 from typing import Literal
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23
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24 from pydantic import BaseModel, field_validator
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25 from twisted.internet import defer
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26 from twisted.words.protocols.jabber import jid
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27 from twisted.words.xish import domish
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28
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29 from libervia.backend.core.constants import Const as C
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30 from libervia.backend.core.core_types import MessageData, SatXMPPEntity
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31 from libervia.backend.core.i18n import _
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32 from libervia.backend.core.log import getLogger
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33 from libervia.backend.memory import persistent
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34 from libervia.backend.plugins.plugin_xep_0106 import XEP_0106
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35 from libervia.backend.plugins.plugin_xep_0131 import XEP_0131
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36 from libervia.backend.plugins.plugin_xep_0373 import get_gpg_provider
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37 from libervia.backend.tools.common import regex
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38
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39 if TYPE_CHECKING:
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40 from libervia.backend.core.main import LiberviaBackend
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41
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42 log = getLogger(__name__)
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43
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44
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45 PLUGIN_INFO = {
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46 C.PI_NAME: "Autocrypt",
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47 C.PI_IMPORT_NAME: "AUTOCRYPT",
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48 C.PI_TYPE: C.PLUG_TYPE_SEC,
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49 C.PI_MODES: C.PLUG_MODE_BOTH,
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50 C.PI_PROTOCOLS: [],
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51 C.PI_DEPENDENCIES: ["XEP-0106", "XEP-0131", "XEP-0373"],
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52 C.PI_RECOMMENDATIONS: [],
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53 C.PI_MAIN: "Autocrypt",
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54 C.PI_HANDLER: "no",
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55 C.PI_DESCRIPTION: _(
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56 "Autocrypt support, to automatically encrypt message to email gateways when "
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57 "suitable."
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58 ),
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59 }
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60
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61
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62 class AutocryptHeaderParseError(ValueError):
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63 """Raised when Autocrypt header parsing fails"""
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64
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65
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66 class AutocryptData(BaseModel):
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67 """Parsed Autocrypt header data.
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68
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69 @param addr: Email address for the key.
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70 @param keydata: Base64-encoded public key.
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71 @param prefer_encrypt: Encryption preference hint.
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72 """
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73
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74 addr: str
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75 keydata: str
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76 prefer_encrypt: Literal["mutual"] | None = None
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77
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78 @field_validator("addr")
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79 @classmethod
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80 def check_email(cls, value):
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81 value = value.strip()
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82 if not regex.RE_EMAIL.match(value):
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83 raise ValueError("Invalid email address")
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84 return value
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85
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86 @field_validator("keydata")
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87 @classmethod
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88 def validate_keydata(cls, value: str) -> str:
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89 """Validate keydata is proper base64"""
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90 try:
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91 base64.b64decode(value, validate=True)
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92 except ValueError as e:
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93 raise ValueError("Invalid base64 in keydata") from e
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94 return value.strip()
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95
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96 def to_header(self) -> str:
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97 """Generate the Autocrypt header.
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98
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99 @return: Formatted header value per Autocrypt specification.
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100 """
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101 parts = [f"addr={self.addr}", f"keydata={self.keydata}"]
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102
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103 if self.prefer_encrypt is not None:
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104 parts.append(f"prefer-encrypt={self.prefer_encrypt}")
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105
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106 return "; ".join(parts)
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107
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108
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109 def parse_autocrypt_header(header: str) -> AutocryptData:
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110 """Parse an Autocrypt header.
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111
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112 @param header: Raw Autocrypt header value
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113 @return: Parsed AutocryptData.
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114 @raise AutocryptHeaderParseError: Some required field is invalid or missing.
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115 """
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116 attributes = {}
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117 for part in header.split(";"):
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118 part = part.strip()
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119 if not part:
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120 continue
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121 if "=" not in part:
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122 # Ignore invalid parts
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123 continue
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124 key, value = part.split("=", 1)
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125 key = key.strip().lower()
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126 value = value.strip()
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127
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128 if key in {"addr", "keydata", "prefer-encrypt"}:
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129 attributes[key] = value
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130
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131 if not attributes.get("addr"):
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132 raise AutocryptHeaderParseError('Missing required "addr" attribute')
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133 if not attributes.get("keydata"):
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134 raise AutocryptHeaderParseError('Missing required "keydata" attribute')
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135
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136 try:
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137 return AutocryptData(
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138 addr=attributes["addr"],
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139 keydata=attributes["keydata"],
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diff changeset
140 prefer_encrypt=attributes.get("prefer-encrypt"),
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
141 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
142 except ValueError as e:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
143 raise AutocryptHeaderParseError(f"Invalid Autocrypt header: {e}") from e
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
144
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
145
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
146 class Autocrypt:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
147
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
148 def __init__(self, host: "LiberviaBackend") -> None:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
149 self.host = host
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
150 log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
151 self._shim = cast(XEP_0131, host.plugins["XEP-0131"])
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
152 self._e = cast(XEP_0106, host.plugins["XEP-0106"])
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
153 host.trigger.add("message_received", self.message_received_trigger)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
154 host.trigger.add("sendMessage", self.send_message_trigger)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
155
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
156 def profile_connecting(self, client: SatXMPPEntity) -> None:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
157 # Sender already handled.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
158 client._autocrypt_seen: set[str] = set()
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
159 client._autocrypt_gpg_provider = get_gpg_provider(self.host, client)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
160
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
161 async def handle_autocrypt_data(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
162 self, client: SatXMPPEntity, mess_data: MessageData, autocrypt_data_raw: str
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
163 ) -> None:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
164 """Process Autocrypt header from XMPP email gateway
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
165
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
166 @param client: Client session.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
167 @param mess_data: Message data.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
168 @param autocrypt_data: Raw Autocrypt header value
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
169 @raise AutocryptHeaderParseError: For invalid header format
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
170 """
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
171 from_jid = mess_data["from"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
172 to_jid = mess_data["to"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
173 is_email_gateway = await self.host.memory.disco.has_identity(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
174 client, "gateway", "smtp", jid.JID(to_jid.host)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
175 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
176 if to_jid.resource or not is_email_gateway:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
177 log.warning("Ignoring Autocrypt header from non email gateway.")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
178 return
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
179
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
180 try:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
181 autocrypt_data = parse_autocrypt_header(autocrypt_data_raw)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
182 except AutocryptHeaderParseError as e:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
183 log.error(f"Invalid Autocrypt header: {e}")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
184 return
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
185
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
186 sender_email = self._e.unescape(from_jid.user)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
187 if sender_email != autocrypt_data.addr:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
188 log.warning(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
189 f"Sender email ({sender_email!r}) doesn't match autocrypt header address"
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
190 f" ({autocrypt_data.addr!r}), ignoring autocrypt data."
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
191 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
192 return
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
193
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
194 if sender_email in client._autocrypt_seen:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
195 log.debug(f"We have already handled {sender_email!r} , nothing to do.")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
196 return None
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
197 gpg_provider = client._autocrypt_gpg_provider
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
198 public_keys = gpg_provider.list_public_keys(sender_email)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
199 if not public_keys:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
200 log.debug(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
201 f"No public key found for {sender_email!r}, importing autocrypt data."
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
202 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
203 # FIXME: Maybe we should import the Autocrypt key in a separated location?
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
204 # Autocrypt is less secure than normal key management.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
205 gpg_provider.import_public_key(base64.b64decode(autocrypt_data.keydata))
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
206 else:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
207 log.debug(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
208 f"There are already known public key for {sender_email}, we skipt "
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
209 "autocrypt"
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
210 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
211 client._autocrypt_seen.add(sender_email)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
212
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
213 def _check_headers(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
214 self, client: SatXMPPEntity, mess_data: MessageData
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
215 ) -> MessageData:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
216 try:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
217 autocrypt_data = mess_data["extra"]["headers"]["autocrypt"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
218 except KeyError:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
219 pass
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
220 else:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
221 defer.ensureDeferred(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
222 self.handle_autocrypt_data(client, mess_data, autocrypt_data)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
223 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
224 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
225
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
226 def message_received_trigger(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
227 self,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
228 client: SatXMPPEntity,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
229 message_elt: domish.Element,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
230 post_treat: defer.Deferred,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
231 ) -> Literal[True]:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
232 post_treat.addCallback(partial(self._check_headers, client))
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
233 return True
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
234
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
235 async def add_autocrypt_header(self, client, mess_data: MessageData) -> MessageData:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
236 to_jid = mess_data["to"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
237 if await self.host.memory.disco.has_identity(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
238 client, "gateway", "smtp", jid.JID(to_jid.host)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
239 ):
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
240 gpg_provider = client._autocrypt_gpg_provider
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
241 # FIXME! We currently use from jid as email, but we would need to get sender
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
242 # email from gateway instead, as we don't know what is actually used, and it
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
243 # may differ from the JID.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
244 sender_email = mess_data["from"].userhost()
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
245 try:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
246 public_key = next(iter(gpg_provider.list_public_keys(sender_email)))
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
247 except StopIteration:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
248 log.debug("No public key found, can't set autocrypt header.")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
249 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
250
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
251 exported_key = gpg_provider.export_public_key(public_key)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
252 autocrypt_data = AutocryptData(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
253 addr=sender_email,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
254 keydata=base64.b64encode(exported_key).decode("ascii"),
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
255 prefer_encrypt="mutual",
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
256 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
257
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
258 mess_data["extra"].setdefault("headers", {})[
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
259 "autocrypt"
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
260 ] = autocrypt_data.to_header()
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
261 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
262
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
263 def send_message_trigger(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
264 self, client, mess_data, pre_xml_treatments, post_xml_treatments
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
265 ) -> Literal[True]:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
266 """Process the XEP-0131 related data to be sent"""
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
267
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
268 def add_headers(mess_data: MessageData) -> MessageData:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
269 extra = mess_data["extra"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
270 self.move_keywords_to_headers(extra)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
271 # Now we parse headers, if any.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
272 if "headers" in extra:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
273 headers_data = HeadersData(**extra["headers"])
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
274 message_elt = mess_data["xml"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
275 message_elt.addChild(headers_data.to_element())
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
276 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
277
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
278 post_xml_treatments.addCallback(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
279 lambda mess_data: defer.ensureDeferred(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
280 self.add_autocrypt_header(client, mess_data)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
281 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
282 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
283 return True