Mercurial > libervia-backend
view sat/plugins/plugin_comp_ap_gateway/regex.py @ 3983:31c3d6652115
component AP gateway: ignore actor delection notifications:
When a `Delete` activity was received and the object was the emitting actor itself, the
signature checking was failing if the actor was unknown (due to the impossibility to
retrieve the actor public key, as it is no more accessible).
To avoid that, those notifications are ignored for now. In the future they should clean
the cache linked to this actor.
author | Goffi <goffi@goffi.org> |
---|---|
date | Tue, 15 Nov 2022 18:15:16 +0100 |
parents | 381340b9a9ee |
children |
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#!/usr/bin/env python3 # Libervia ActivityPub Gateway # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. """Various Regular Expression for AP gateway""" import re ## "Signature" header parsing # those expression have been generated with abnf-to-regex # (https://github.com/aas-core-works/abnf-to-regexp) # the base RFC 7320 ABNF rules come from https://github.com/EricGT/ABNF # here is the ABNF file used: # --- # BWS = OWS # OWS = *( SP / HTAB ) # tchar = "!" / "#" / "$" / "%" / "&" / "`" / "*" / "+" / "-" / "." / "^" / "_" / "\'" / "|" / "~" / DIGIT / ALPHA # token = 1*tchar # sig-param = token BWS "=" BWS ( token / quoted-string ) # quoted-string = DQUOTE *( qdtext / quoted-pair ) DQUOTE # qdtext = HTAB / SP / "!" / %x23-5B ; '#'-'[' # / %x5D-7E ; ']'-'~' # / obs-text # quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text ) # obs-text = %x80-FF # --- ows = '[ \t]*' bws = f'{ows}' obs_text = '[\\x80-\\xff]' qdtext = f'([\t !#-\\[\\]-~]|{obs_text})' quoted_pair = f'\\\\([\t !-~]|{obs_text})' quoted_string = f'"({qdtext}|{quoted_pair})*"' tchar = "([!#$%&`*+\\-.^_]|\\\\'|[|~0-9a-zA-Z])" token = f'({tchar})+' RE_SIG_PARAM = re.compile( f'(?P<key>{token}{bws})={bws}' f'((?P<uq_value>{token})|(?P<quoted_value>{quoted_string}))' ) ## Account/Mention # FIXME: naive regex, should be approved following webfinger, but popular implementations # such as Mastodon use a very restricted subset RE_ACCOUNT = re.compile(r"[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+.[a-zA-Z0-9-]+") RE_MENTION = re.compile(rf"(?<!\w)@{RE_ACCOUNT.pattern}\b")