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annotate sat/tools/common/regex.py @ 3104:118d91c932a7

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plugin XEP-0384: OMEMO for MUC implementation: - encryption is now allowed for group chats - when an encryption is requested for a MUC, real jids or all occupants are used to encrypt the message - a cache for plain text message sent to MUC is used, because for security reason we can't encrypt message for our own device with OMEMO (that would prevent ratchet and break the prefect forward secrecy). Thus, message sent in MUC are cached for 5 min, and the decrypted version is used when found. We don't send immediately the plain text message to frontends and history because we want to keep the same MUC behaviour as for plain text, and receiving a message means that it was received and sent back by MUC service - <origin-id> is used to identify messages sent by our device - a feedback_jid is now use to use correct entity for feedback message in case of problem: with a room we have to send feedback message to the room and not the the emitter - encryptMessage now only accepts list in the renamed "entity_bare_jids" argument
author Goffi <goffi@goffi.org>
date Mon, 30 Dec 2019 20:59:46 +0100
parents ab2696e34d29
children 9d0df638c8b4
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1 #!/usr/bin/env python3
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2 # -*- coding: utf-8 -*-
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4 # Salut à Toi: an XMPP client
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5 # Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 """ regex tools common to backend and frontends """
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21
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22 import re
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23
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24 path_escape = {"%": "%25", "/": "%2F", "\\": "%5c"}
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25 path_escape_rev = {re.escape(v): k for k, v in path_escape.items()}
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26 path_escape = {re.escape(k): v for k, v in path_escape.items()}
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27 #  thanks to Martijn Pieters (https://stackoverflow.com/a/14693789)
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28 RE_ANSI_REMOVE = re.compile(r"\x1b[^m]*m")
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31 def reJoin(exps):
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32 """Join (OR) various regexes"""
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33 return re.compile("|".join(exps))
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36 def reSubDict(pattern, repl_dict, string):
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37 """Replace key, value found in dict according to pattern
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38
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39 @param pattern(basestr): pattern using keys found in repl_dict
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40 @repl_dict(dict): keys found in this dict will be replaced by
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41 corresponding values
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42 @param string(basestr): string to use for the replacement
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43 """
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44 return pattern.sub(lambda m: repl_dict[re.escape(m.group(0))], string)
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47 path_escape_re = reJoin(list(path_escape.keys()))
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48 path_escape_rev_re = reJoin(list(path_escape_rev.keys()))
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51 def pathEscape(string):
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52 """Escape string so it can be use in a file path
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54 @param string(basestr): string to escape
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55 @return (str, unicode): escaped string, usable in a file path
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56 """
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57 return reSubDict(path_escape_re, path_escape, string)
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60 def pathUnescape(string):
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61 """Unescape string from value found in file path
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63 @param string(basestr): string found in file path
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64 @return (str, unicode): unescaped string
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65 """
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66 return reSubDict(path_escape_rev_re, path_escape_rev, string)
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68
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69 def ansiRemove(string):
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70 """Remove ANSI escape codes from string
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72 @param string(basestr): string to filter
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73 @return (str, unicode): string without ANSI escape codes
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74 """
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75 return RE_ANSI_REMOVE.sub("", string)