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comparison src/plugins/plugin_xep_0300.py @ 1526:bb451fd1cea3

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plugin XEP-0300: hashes management first draft
author Goffi <goffi@goffi.org>
date Fri, 25 Sep 2015 19:19:12 +0200
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children 0de5f210fe56
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1525:49d33cb48207 1526:bb451fd1cea3
1 #!/usr/bin/python
2 # -*- coding: utf-8 -*-
3
4 # SAT plugin for Hash functions (XEP-0300)
5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org)
6
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU Affero General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
11
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU Affero General Public License for more details.
16
17 # You should have received a copy of the GNU Affero General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20 from sat.core.i18n import _
21 from sat.core.log import getLogger
22 log = getLogger(__name__)
23 from twisted.words.xish import domish
24 import hashlib
25
26
27 NS_HASHES = "urn:xmpp:hashes:1"
28
29 PLUGIN_INFO = {
30 "name": "Cryptographic Hash Functions",
31 "import_name": "XEP-0300",
32 "type": "XEP",
33 "protocols": ["XEP-0300"],
34 "main": "XEP_0300",
35 "handler": "no",
36 "description": _("""Management of cryptographic hashes""")
37 }
38
39
40 class XEP_0300(object):
41 ALGOS = {u'md5': hashlib.md5,
42 u'sha-1': hashlib.sha1,
43 u'sha-256': hashlib.sha256,
44 u'sha-512': hashlib.sha512,
45 }
46
47 def __init__(self, host):
48 log.info(_("plugin Hashes initialization"))
49
50 def buidHash(self, file_obj=None, algo='sha-256'):
51 """Compute hash and build hash element
52
53 @param file_obj(file, None): file to use to calculate the hash
54 if file_obj is None, en empty hash element will be returned (useful e.g. in XEP-0234)
55 @param algo(unicode): algorithme to use, must be a key of XEP_0300.ALGOS
56 @return (domish.Element): computed hash
57 """
58 hasher = self.ALGOS[algo]
59 hash_elt = domish.Element((NS_HASHES, 'hash'))
60 hash_elt['algo']=algo
61 # TODO: actually hash, use deferToThread
62 return hash_elt
63