libervia-backend: libervia/backend/plugins/plugin_sec

annotate libervia/backend/plugins/plugin_sec_aesgcm.py @ 4090:e9d800b105c1

cli (event): minor typo

author	Goffi <goffi@goffi.org>
date	Thu, 08 Jun 2023 21:28:40 +0200
parents	4b842c1fb686
children	0d7bb4df2343

rev	line source
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	1 #!/usr/bin/env python3
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	2
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	3 # SàT plugin for handling AES-GCM file encryption
3479 be6d91572633 date update Goffi <goffi@goffi.org> parents: 3222 diff changeset	4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	5
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	6 # This program is free software: you can redistribute it and/or modify
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	7 # it under the terms of the GNU Affero General Public License as published by
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	8 # the Free Software Foundation, either version 3 of the License, or
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	9 # (at your option) any later version.
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	10
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	11 # This program is distributed in the hope that it will be useful,
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	14 # GNU Affero General Public License for more details.
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	15
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	16 # You should have received a copy of the GNU Affero General Public License
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	18
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	19 import re
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	20 from textwrap import dedent
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	21 from functools import partial
3186 84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	22 from urllib import parse
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	23 import mimetypes
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	24 import secrets
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	25 from cryptography.hazmat.primitives import ciphers
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	26 from cryptography.hazmat.primitives.ciphers import modes
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	27 from cryptography.hazmat import backends
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	28 from cryptography.exceptions import AlreadyFinalized
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	29 import treq
3186 84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	30 from twisted.internet import defer
4071 4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4051 diff changeset	31 from libervia.backend.core.i18n import _
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4051 diff changeset	32 from libervia.backend.core.constants import Const as C
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4051 diff changeset	33 from libervia.backend.core import exceptions
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4051 diff changeset	34 from libervia.backend.tools import stream
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4051 diff changeset	35 from libervia.backend.core.log import getLogger
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend` Goffi <goffi@goffi.org> parents: 4051 diff changeset	36 from libervia.backend.tools.web import treq_client_no_ssl
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	37
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	38 log = getLogger(__name__)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	39
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	40 PLUGIN_INFO = {
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	41 C.PI_NAME: "AES-GCM",
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	42 C.PI_IMPORT_NAME: "AES-GCM",
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	43 C.PI_TYPE: "SEC",
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	44 C.PI_PROTOCOLS: ["OMEMO Media sharing"],
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	45 C.PI_DEPENDENCIES: ["XEP-0363", "XEP-0384", "DOWNLOAD", "ATTACH"],
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	46 C.PI_MAIN: "AESGCM",
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	47 C.PI_HANDLER: "no",
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	48 C.PI_DESCRIPTION: dedent(_("""\
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	49 Implementation of AES-GCM scheme, a way to encrypt files (not official XMPP standard).
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	50 See https://xmpp.org/extensions/inbox/omemo-media-sharing.html for details
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	51 """)),
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	52 }
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	53
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	54 AESGCM_RE = re.compile(
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	55 r'aesgcm:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9'
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	56 r'()@:%_\+.~#?&\/\/=]*)')
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	57
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	58
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	59 class AESGCM(object):
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	60
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	61 def __init__(self, host):
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	62 self.host = host
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	63 log.info(_("AESGCM plugin initialization"))
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	64 self._http_upload = host.plugins['XEP-0363']
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	65 self._attach = host.plugins["ATTACH"]
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	66 host.plugins["DOWNLOAD"].register_scheme(
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	67 "aesgcm", self.download
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	68 )
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	69 self._attach.register(
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	70 self.can_handle_attachment, self.attach, encrypted=True)
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	71 host.trigger.add("XEP-0363_upload_pre_slot", self._upload_pre_slot)
0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	72 host.trigger.add("XEP-0363_upload", self._upload_trigger)
4051 c23cad65ae99 core: renamed `messageReceived` trigger to `message_received` Goffi <goffi@goffi.org> parents: 4037 diff changeset	73 host.trigger.add("message_received", self._message_received_trigger)
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	74
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	75 async def download(self, client, uri_parsed, dest_path, options):
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	76 fragment = bytes.fromhex(uri_parsed.fragment)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	77
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	78 # legacy method use 16 bits IV, but OMEMO media sharing published spec indicates
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	79 # which is 12 bits IV (AES-GCM spec recommandation), so we have to determine
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	80 # which size has been used.
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	81 if len(fragment) == 48:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	82 iv_size = 16
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	83 elif len(fragment) == 44:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	84 iv_size = 12
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	85 else:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	86 raise ValueError(
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	87 f"Invalid URL fragment, can't decrypt file at {uri_parsed.get_url()}")
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	88
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	89 iv, key = fragment[:iv_size], fragment[iv_size:]
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	90
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	91 decryptor = ciphers.Cipher(
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	92 ciphers.algorithms.AES(key),
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	93 modes.GCM(iv),
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	94 backend=backends.default_backend(),
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	95 ).decryptor()
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	96
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	97 download_url = parse.urlunparse(
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	98 ('https', uri_parsed.netloc, uri_parsed.path, '', '', ''))
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	99
3205 2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	100 if options.get('ignore_tls_errors', False):
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	101 log.warning(
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	102 "TLS certificate check disabled, this is highly insecure"
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	103 )
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	104 treq_client = treq_client_no_ssl
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	105 else:
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	106 treq_client = treq
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	107
2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	108 head_data = await treq_client.head(download_url)
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	109 content_length = int(head_data.headers.getRawHeaders('content-length')[0])
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	110 # the 128 bits tag is put at the end
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	111 file_size = content_length - 16
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	112
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	113 file_obj = stream.SatFile(
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	114 self.host,
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	115 client,
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	116 dest_path,
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	117 mode="wb",
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	118 size = file_size,
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	119 )
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	120
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	121 progress_id = file_obj.uid
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	122
3205 2c0628f3927e plugin download, aesgcm: disable TLS check if `check_certificate` setting is disabled Goffi <goffi@goffi.org> parents: 3196 diff changeset	123 resp = await treq_client.get(download_url, unbuffered=True)
3186 84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	124 if resp.code == 200:
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	125 d = treq.collect(resp, partial(
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	126 self.on_data_download,
3186 84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	127 client=client,
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	128 file_obj=file_obj,
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	129 decryptor=decryptor))
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	130 else:
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	131 d = defer.Deferred()
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	132 self.host.plugins["DOWNLOAD"].errback_download(file_obj, d, resp)
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	133 return progress_id, d
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	134
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	135 async def can_handle_attachment(self, client, data):
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	136 try:
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	137 await self._http_upload.get_http_upload_entity(client)
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	138 except exceptions.NotFound:
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	139 return False
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	140 else:
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	141 return True
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	142
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	143 async def _upload_cb(self, client, filepath, filename, extra):
0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	144 extra['encryption'] = C.ENC_AES_GCM
0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	145 return await self._http_upload.file_http_upload(
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	146 client=client,
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	147 filepath=filepath,
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	148 filename=filename,
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	149 extra=extra
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	150 )
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	151
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	152 async def attach(self, client, data):
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	153 # XXX: the attachment removal/resend code below is due to the one file per
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	154 # message limitation of OMEMO media sharing unofficial XEP. We have to remove
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	155 # attachments from original message, and send them one by one.
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	156 # TODO: this is to be removed when a better mechanism is available with OMEMO (now
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	157 # possible with the 0.4 version of OMEMO, it's possible to encrypt other stanza
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	158 # elements than body).
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3922 diff changeset	159 attachments = data["extra"][C.KEY_ATTACHMENTS]
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	160 if not data['message'] or data['message'] == {'': ''}:
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	161 extra_attachments = attachments[1:]
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	162 del attachments[1:]
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	163 await self._attach.upload_files(client, data, upload_cb=self._upload_cb)
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	164 else:
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	165 # we have a message, we must send first attachment separately
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	166 extra_attachments = attachments[:]
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	167 attachments.clear()
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3922 diff changeset	168 del data["extra"][C.KEY_ATTACHMENTS]
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	169
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	170 body_elt = data["xml"].body
0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	171 if body_elt is None:
0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	172 body_elt = data["xml"].addElement("body")
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	173
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	174 for attachment in attachments:
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	175 body_elt.addContent(attachment["url"])
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	176
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	177 for attachment in extra_attachments:
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	178 # we send all remaining attachment in a separate message
3222 653fa213d2f8 plugin aesgcm: wait for each splitted message to be sent before sending next one Goffi <goffi@goffi.org> parents: 3219 diff changeset	179 await client.sendMessage(
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	180 to_jid=data['to'],
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	181 message={'': ''},
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	182 subject=data['subject'],
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	183 mess_type=data['type'],
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3922 diff changeset	184 extra={C.KEY_ATTACHMENTS: [attachment]},
3219 2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	185 )
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	186
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	187 if ((not data['extra']
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	188 and (not data['message'] or data['message'] == {'': ''})
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	189 and not data['subject'])):
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	190 # nothing left to send, we can cancel the message
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	191 raise exceptions.CancelError("Cancelled by AESGCM attachment handling")
2ba602aef90e plugin attach, aesgcm: attachments refactoring: Goffi <goffi@goffi.org> parents: 3205 diff changeset	192
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	193 def on_data_download(self, data, client, file_obj, decryptor):
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	194 if file_obj.tell() + len(data) > file_obj.size:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	195 # we're reaching end of file with this bunch of data
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	196 # we may still have a last bunch if the tag is incomplete
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	197 bytes_left = file_obj.size - file_obj.tell()
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	198 if bytes_left > 0:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	199 decrypted = decryptor.update(data[:bytes_left])
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	200 file_obj.write(decrypted)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	201 tag = data[bytes_left:]
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	202 else:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	203 tag = data
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	204 if len(tag) < 16:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	205 # the tag is incomplete, either we'll get the rest in next data bunch
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	206 # or we have already the other part from last bunch of data
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	207 try:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	208 # we store partial tag in decryptor._sat_tag
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	209 tag = decryptor._sat_tag + tag
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	210 except AttributeError:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	211 # no other part, we'll get the rest at next bunch
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	212 decryptor.sat_tag = tag
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	213 else:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	214 # we have the complete tag, it must be 128 bits
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	215 if len(tag) != 16:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	216 raise ValueError(f"Invalid tag: {tag}")
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	217 remain = decryptor.finalize_with_tag(tag)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	218 file_obj.write(remain)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	219 file_obj.close()
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	220 else:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	221 decrypted = decryptor.update(data)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	222 file_obj.write(decrypted)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	223
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	224 def _upload_pre_slot(self, client, extra, file_metadata):
0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	225 if extra.get('encryption') != C.ENC_AES_GCM:
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	226 return True
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	227 # the tag is appended to the file
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	228 file_metadata["size"] += 16
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	229 return True
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	230
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	231 def _encrypt(self, data, encryptor):
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	232 if data:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	233 return encryptor.update(data)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	234 else:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	235 try:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	236 # end of file is reached, me must finalize
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	237 ret = encryptor.finalize()
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	238 tag = encryptor.tag
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	239 return ret + tag
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	240 except AlreadyFinalized:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	241 # as we have already finalized, we can now send EOF
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	242 return b''
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	243
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	244 def _upload_trigger(self, client, extra, sat_file, file_producer, slot):
0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	245 if extra.get('encryption') != C.ENC_AES_GCM:
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	246 return True
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	247 log.debug("encrypting file with AES-GCM")
3178 98b321234068 plugin aesgcm: use 12 bytes Initialisation Vector: Goffi <goffi@goffi.org> parents: 3174 diff changeset	248 iv = secrets.token_bytes(12)
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	249 key = secrets.token_bytes(32)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	250 fragment = f'{iv.hex()}{key.hex()}'
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	251 ori_url = parse.urlparse(slot.get)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	252 # we change the get URL with the one with aesgcm scheme and containing the
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	253 # encoded key + iv
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	254 slot.get = parse.urlunparse(['aesgcm', *ori_url[1:5], fragment])
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	255
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	256 # encrypted data size will be bigger than original file size
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	257 # so we need to check with final data length to avoid a warning on close()
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	258 sat_file.check_size_with_read = True
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	259
3922 0ff265725489 plugin XEP-0447: handle attachment and download: Goffi <goffi@goffi.org> parents: 3859 diff changeset	260 # file_producer get length directly from file, and this cause trouble as
3090 4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	261 # we have to change the size because of encryption. So we adapt it here,
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	262 # else the producer would stop reading prematurely
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	263 file_producer.length = sat_file.size
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	264
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	265 encryptor = ciphers.Cipher(
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	266 ciphers.algorithms.AES(key),
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	267 modes.GCM(iv),
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	268 backend=backends.default_backend(),
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	269 ).encryptor()
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	270
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	271 if sat_file.data_cb is not None:
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	272 raise exceptions.InternalError(
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	273 f"data_cb was expected to be None, it is set to {sat_file.data_cb}")
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	274
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	275 # with data_cb we encrypt the file on the fly
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	276 sat_file.data_cb = partial(self._encrypt, encryptor=encryptor)
4f8bdf50593f plugin sec aesgcm: new plugin handling `aesgcm:` scheme for e2e encrypted media sharing: Goffi <goffi@goffi.org> parents: diff changeset	277 return True
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	278
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	279
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	280 def _pop_aesgcm_links(self, match, links):
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	281 link = match.group()
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	282 if link not in links:
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	283 links.append(link)
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	284 return ""
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	285
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	286 def _check_aesgcm_attachments(self, client, data):
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	287 if not data.get('message'):
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	288 return data
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	289 links = []
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	290
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	291 for lang, message in list(data['message'].items()):
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	292 message = AESGCM_RE.sub(
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	293 partial(self._pop_aesgcm_links, links=links),
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	294 message)
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	295 if links:
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	296 message = message.strip()
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	297 if not message:
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	298 del data['message'][lang]
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	299 else:
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	300 data['message'][lang] = message
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	301 mess_encrypted = client.encryption.isEncrypted(data)
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3922 diff changeset	302 attachments = data['extra'].setdefault(C.KEY_ATTACHMENTS, [])
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	303 for link in links:
3186 84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors Goffi <goffi@goffi.org> parents: 3178 diff changeset	304 path = parse.urlparse(link).path
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	305 attachment = {
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	306 "url": link,
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	307 }
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	308 media_type = mimetypes.guess_type(path, strict=False)[0]
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	309 if media_type is not None:
4023 78b5f356900c component AP gateway: handle attachments Goffi <goffi@goffi.org> parents: 3922 diff changeset	310 attachment[C.KEY_ATTACHMENTS_MEDIA_TYPE] = media_type
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	311
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	312 if mess_encrypted:
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	313 # we don't add the encrypted flag if the message itself is not
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	314 # encrypted, because the decryption key is part of the link,
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	315 # so sending it over unencrypted channel is like having no
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	316 # encryption at all.
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	317 attachment['encrypted'] = True
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	318 attachments.append(attachment)
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	319
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	320 return data
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	321
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	322 def _message_received_trigger(self, client, message_elt, post_treat):
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	323 # we use a post_treat callback instead of "message_parse" trigger because we need
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	324 # to check if the "encrypted" flag is set to decide if we add the same flag to the
c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	325 # attachment
4037 524856bd7b19 massive refactoring to switch from camelCase to snake_case: Goffi <goffi@goffi.org> parents: 4023 diff changeset	326 post_treat.addCallback(partial(self._check_aesgcm_attachments, client))
3174 c90f27ce52b0 plugin aesgcm: look for "aesgcm" links in body to use them as attachments Goffi <goffi@goffi.org> parents: 3136 diff changeset	327 return True

Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_sec_aesgcm.py @ 4090:e9d800b105c1