/usr/lib/python3/dist-packages/oauthlib/oauth2/rfc6749/grant_types/refresh_token.py is in python3-oauthlib 0.6.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""
oauthlib.oauth2.rfc6749.grant_types
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"""
from __future__ import unicode_literals, absolute_import
import json
from oauthlib.common import log
from .base import GrantTypeBase
from .. import errors, utils
from ..request_validator import RequestValidator
class RefreshTokenGrant(GrantTypeBase):
"""`Refresh token grant`_
.. _`Refresh token grant`: http://tools.ietf.org/html/rfc6749#section-6
"""
@property
def issue_new_refresh_tokens(self):
return True
def __init__(self, request_validator=None, issue_new_refresh_tokens=True):
self.request_validator = request_validator or RequestValidator()
def create_token_response(self, request, token_handler):
"""Create a new access token from a refresh_token.
If valid and authorized, the authorization server issues an access
token as described in `Section 5.1`_. If the request failed
verification or is invalid, the authorization server returns an error
response as described in `Section 5.2`_.
The authorization server MAY issue a new refresh token, in which case
the client MUST discard the old refresh token and replace it with the
new refresh token. The authorization server MAY revoke the old
refresh token after issuing a new refresh token to the client. If a
new refresh token is issued, the refresh token scope MUST be
identical to that of the refresh token included by the client in the
request.
.. _`Section 5.1`: http://tools.ietf.org/html/rfc6749#section-5.1
.. _`Section 5.2`: http://tools.ietf.org/html/rfc6749#section-5.2
"""
headers = {
'Content-Type': 'application/json',
'Cache-Control': 'no-store',
'Pragma': 'no-cache',
}
try:
log.debug('Validating refresh token request, %r.', request)
self.validate_token_request(request)
except errors.OAuth2Error as e:
return headers, e.json, e.status_code
token = token_handler.create_token(request,
refresh_token=self.issue_new_refresh_tokens)
log.debug('Issuing new token to client id %r (%r), %r.',
request.client_id, request.client, token)
return headers, json.dumps(token), 200
def validate_token_request(self, request):
# REQUIRED. Value MUST be set to "refresh_token".
if request.grant_type != 'refresh_token':
raise errors.UnsupportedGrantTypeError(request=request)
if request.refresh_token is None:
raise errors.InvalidRequestError(
description='Missing refresh token parameter.',
request=request)
# Because refresh tokens are typically long-lasting credentials used to
# request additional access tokens, the refresh token is bound to the
# client to which it was issued. If the client type is confidential or
# the client was issued client credentials (or assigned other
# authentication requirements), the client MUST authenticate with the
# authorization server as described in Section 3.2.1.
# http://tools.ietf.org/html/rfc6749#section-3.2.1
if self.request_validator.client_authentication_required(request):
log.debug('Authenticating client, %r.', request)
if not self.request_validator.authenticate_client(request):
log.debug('Invalid client (%r), denying access.', request)
raise errors.InvalidClientError(request=request, status_code=401)
elif not self.request_validator.authenticate_client_id(request.client_id, request):
log.debug('Client authentication failed, %r.', request)
raise errors.InvalidClientError(request=request)
# Ensure client is authorized use of this grant type
self.validate_grant_type(request)
# REQUIRED. The refresh token issued to the client.
log.debug('Validating refresh token %s for client %r.',
request.refresh_token, request.client)
if not self.request_validator.validate_refresh_token(
request.refresh_token, request.client, request):
log.debug('Invalid refresh token, %s, for client %r.',
request.refresh_token, request.client)
raise errors.InvalidGrantError(request=request)
original_scopes = utils.scope_to_list(
self.request_validator.get_original_scopes(
request.refresh_token, request))
if request.scope:
request.scopes = utils.scope_to_list(request.scope)
if (not all((s in original_scopes for s in request.scopes))
and not self.request_validator.is_within_original_scope(
request.scopes, request.refresh_token, request)):
log.debug('Refresh token %s lack requested scopes, %r.',
request.refresh_token, request.scopes)
raise errors.InvalidScopeError(
state=request.state, request=request, status_code=401)
else:
request.scopes = original_scopes
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