147 lines
5.5 KiB
Python
147 lines
5.5 KiB
Python
# Copyright (C) 2003-2014 Yann Leboulanger <asterix AT lagaule.org>
|
|
# Copyright (C) 2005 Alex Mauer <hawke AT hawkesnest.net>
|
|
# Copyright (C) 2005-2006 Nikos Kouremenos <kourem AT gmail.com>
|
|
# Copyright (C) 2007 Stephan Erb <steve-e AT h3c.de>
|
|
# Copyright (C) 2008 Jean-Marie Traissard <jim AT lapin.org>
|
|
# Jonathan Schleifer <js-gajim AT webkeks.org>
|
|
#
|
|
# This file is part of Gajim.
|
|
#
|
|
# Gajim is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published
|
|
# by the Free Software Foundation; version 3 only.
|
|
#
|
|
# Gajim 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 General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import os
|
|
import logging
|
|
from gajim.common import app
|
|
|
|
if app.is_installed('GPG'):
|
|
import gnupg
|
|
gnupg.logger = logging.getLogger('gajim.c.gnupg')
|
|
|
|
class GnuPG(gnupg.GPG):
|
|
def __init__(self):
|
|
use_agent = app.config.get('use_gpg_agent')
|
|
gnupg.GPG.__init__(self, gpgbinary=app.get_gpg_binary(), use_agent=use_agent)
|
|
encoding = app.config.get('pgp_encoding')
|
|
if encoding:
|
|
self.encoding = encoding
|
|
self.decode_errors = 'replace'
|
|
self.passphrase = None
|
|
self.always_trust = [] # list of keyID to always trust
|
|
|
|
def encrypt(self, str_, recipients, always_trust=False):
|
|
trust = always_trust
|
|
if not trust:
|
|
# check if we trust all keys
|
|
trust = True
|
|
for key in recipients:
|
|
if key not in self.always_trust:
|
|
trust = False
|
|
if not trust:
|
|
# check that we'll be able to encrypt
|
|
result = super(GnuPG, self).list_keys(keys=recipients)
|
|
for key in result:
|
|
if key['trust'] not in ('f', 'u'):
|
|
if key['keyid'][-8:] not in self.always_trust:
|
|
return '', 'NOT_TRUSTED ' + key['keyid'][-8:]
|
|
else:
|
|
trust = True
|
|
result = super(GnuPG, self).encrypt(str_.encode('utf8'), recipients,
|
|
always_trust=trust, passphrase=self.passphrase)
|
|
|
|
if result.ok:
|
|
error = ''
|
|
else:
|
|
error = result.status
|
|
|
|
return self._stripHeaderFooter(str(result)), error
|
|
|
|
def decrypt(self, str_, keyID):
|
|
data = self._addHeaderFooter(str_, 'MESSAGE')
|
|
result = super(GnuPG, self).decrypt(data.encode('utf8'),
|
|
passphrase=self.passphrase)
|
|
|
|
return result.data.decode('utf8')
|
|
|
|
def sign(self, str_, keyID):
|
|
result = super(GnuPG, self).sign(str_.encode('utf8'), keyid=keyID, detach=True,
|
|
passphrase=self.passphrase)
|
|
|
|
if result.fingerprint:
|
|
return self._stripHeaderFooter(str(result))
|
|
if hasattr(result, 'status') and result.status == 'key expired':
|
|
return 'KEYEXPIRED'
|
|
return 'BAD_PASSPHRASE'
|
|
|
|
def verify(self, str_, sign):
|
|
if str_ is None:
|
|
return ''
|
|
# Hash algorithm is not transfered in the signed presence stanza so try
|
|
# all algorithms. Text name for hash algorithms from RFC 4880 - section 9.4
|
|
hash_algorithms = ['SHA512', 'SHA384', 'SHA256', 'SHA224', 'SHA1', 'RIPEMD160']
|
|
for algo in hash_algorithms:
|
|
data = os.linesep.join(
|
|
['-----BEGIN PGP SIGNED MESSAGE-----',
|
|
'Hash: ' + algo,
|
|
'',
|
|
str_,
|
|
self._addHeaderFooter(sign, 'SIGNATURE')]
|
|
)
|
|
result = super(GnuPG, self).verify(data.encode('utf8'))
|
|
if result.valid:
|
|
return result.key_id
|
|
|
|
return ''
|
|
|
|
def get_key(self, keyID):
|
|
return super(GnuPG, self).list_keys(keys=[keyID])
|
|
|
|
def get_keys(self, secret=False):
|
|
keys = {}
|
|
result = super(GnuPG, self).list_keys(secret=secret)
|
|
|
|
for key in result:
|
|
# Take first not empty uid
|
|
keys[key['keyid'][8:]] = [uid for uid in key['uids'] if uid][0]
|
|
return keys
|
|
|
|
def get_secret_keys(self):
|
|
return self.get_keys(True)
|
|
|
|
def _stripHeaderFooter(self, data):
|
|
"""
|
|
Remove header and footer from data
|
|
"""
|
|
if not data: return ''
|
|
lines = data.splitlines()
|
|
while lines[0] != '':
|
|
lines.remove(lines[0])
|
|
while lines[0] == '':
|
|
lines.remove(lines[0])
|
|
i = 0
|
|
for line in lines:
|
|
if line:
|
|
if line[0] == '-': break
|
|
i = i+1
|
|
line = '\n'.join(lines[0:i])
|
|
return line
|
|
|
|
def _addHeaderFooter(self, data, type_):
|
|
"""
|
|
Add header and footer from data
|
|
"""
|
|
out = "-----BEGIN PGP %s-----" % type_ + os.linesep
|
|
out = out + "Version: PGP" + os.linesep
|
|
out = out + os.linesep
|
|
out = out + data + os.linesep
|
|
out = out + "-----END PGP %s-----" % type_ + os.linesep
|
|
return out
|