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#!/usr/bin/python3
# Copyright (C) 2017-2018 Lars Wirzenius
#
# 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/>.
import time
import Crypto.PublicKey.RSA
import jwt
import qvisqve
class TokenGenerator:
_algorithm = 'RS512'
def __init__(self):
self._issuer = None
self._lifetime = None
self._key = None
def set_issuer(self, issuer):
self._issuer = issuer
qvisqve.log.log('info', msg_text='Set issuer', issuer=issuer)
def set_lifetime(self, lifetime):
self._lifetime = lifetime
qvisqve.log.log(
'info', msg_text='Set token lifetime', lifetime=lifetime)
def set_signing_key(self, key):
imported_key = Crypto.PublicKey.RSA.importKey(key)
self._key = imported_key.exportKey('PEM')
qvisqve.log.log(
'info', msg_text='Set signing key', key=self._key,
orig_key=key, imported_key=imported_key)
def new_token(self, audience, scope, subject_id=None):
assert self._issuer is not None
assert self._lifetime is not None
assert self._key is not None
now = time.time()
claims = {
'iss': self._issuer,
'sub': subject_id or '',
'aud': audience,
'exp': now + self._lifetime,
'scope': scope,
}
token = jwt.encode(
claims,
self._key,
algorithm=self._algorithm)
return token.decode('ascii')
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