django-oidc-provider/oidc_provider/lib/endpoints/authorize.py
Brian Rosner afc3a60ee7
Added at_hash when access token is present
This is required by response type "id_token token", but can be
used by other flows if they choose.
2016-08-05 14:00:00 -06:00

232 lines
8.8 KiB
Python

import logging
try:
from urllib import urlencode
from urlparse import urlsplit, parse_qs, urlunsplit
except ImportError:
from urllib.parse import urlsplit, parse_qs, urlunsplit, urlencode
from django.utils import timezone
from oidc_provider.lib.claims import StandardScopeClaims
from oidc_provider.lib.errors import *
from oidc_provider.lib.utils.params import *
from oidc_provider.lib.utils.token import *
from oidc_provider.models import *
from oidc_provider import settings
logger = logging.getLogger(__name__)
class AuthorizeEndpoint(object):
def __init__(self, request):
self.request = request
self.params = Params()
self._extract_params()
# Determine which flow to use.
if self.params.response_type in ['code']:
self.grant_type = 'authorization_code'
elif self.params.response_type in ['id_token', 'id_token token', 'token']:
self.grant_type = 'implicit'
else:
self.grant_type = None
# Determine if it's an OpenID Authentication request (or OAuth2).
self.is_authentication = 'openid' in self.params.scope
def _extract_params(self):
"""
Get all the params used by the Authorization Code Flow
(and also for the Implicit).
See: http://openid.net/specs/openid-connect-core-1_0.html#AuthRequest
"""
# Because in this endpoint we handle both GET
# and POST request.
query_dict = (self.request.POST if self.request.method == 'POST'
else self.request.GET)
self.params.client_id = query_dict.get('client_id', '')
self.params.redirect_uri = query_dict.get('redirect_uri', '')
self.params.response_type = query_dict.get('response_type', '')
self.params.scope = query_dict.get('scope', '').split()
self.params.state = query_dict.get('state', '')
self.params.nonce = query_dict.get('nonce', '')
self.params.prompt = query_dict.get('prompt', '')
self.params.code_challenge = query_dict.get('code_challenge', '')
self.params.code_challenge_method = query_dict.get('code_challenge_method', '')
def validate_params(self):
# Client validation.
try:
self.client = Client.objects.get(client_id=self.params.client_id)
except Client.DoesNotExist:
logger.debug('[Authorize] Invalid client identifier: %s', self.params.client_id)
raise ClientIdError()
# Redirect URI validation.
if self.is_authentication and not self.params.redirect_uri:
logger.debug('[Authorize] Missing redirect uri.')
raise RedirectUriError()
clean_redirect_uri = urlsplit(self.params.redirect_uri)
clean_redirect_uri = urlunsplit(clean_redirect_uri._replace(query=''))
if not (clean_redirect_uri in self.client.redirect_uris):
logger.debug('[Authorize] Invalid redirect uri: %s', self.params.redirect_uri)
raise RedirectUriError()
# Grant type validation.
if not self.grant_type:
logger.debug('[Authorize] Invalid response type: %s', self.params.response_type)
raise AuthorizeError(self.params.redirect_uri, 'unsupported_response_type',
self.grant_type)
# Nonce parameter validation.
if self.is_authentication and self.grant_type == 'implicit' and not self.params.nonce:
raise AuthorizeError(self.params.redirect_uri, 'invalid_request',
self.grant_type)
# Response type parameter validation.
if self.is_authentication and self.params.response_type != self.client.response_type:
raise AuthorizeError(self.params.redirect_uri, 'invalid_request',
self.grant_type)
# PKCE validation of the transformation method.
if self.params.code_challenge:
if not (self.params.code_challenge_method in ['plain', 'S256']):
raise AuthorizeError(self.params.redirect_uri, 'invalid_request', self.grant_type)
def create_response_uri(self):
uri = urlsplit(self.params.redirect_uri)
query_params = parse_qs(uri.query)
query_fragment = parse_qs(uri.fragment)
try:
if self.grant_type == 'authorization_code':
code = create_code(
user=self.request.user,
client=self.client,
scope=self.params.scope,
nonce=self.params.nonce,
is_authentication=self.is_authentication,
code_challenge=self.params.code_challenge,
code_challenge_method=self.params.code_challenge_method)
code.save()
query_params['code'] = code.code
query_params['state'] = self.params.state if self.params.state else ''
elif self.grant_type == 'implicit':
token = create_token(
user=self.request.user,
client=self.client,
scope=self.params.scope)
# Check if response_type is an OpenID request with value 'id_token token'
# or it's an OAuth2 Implicit Flow request.
if self.params.response_type in ['id_token token', 'token']:
query_fragment['access_token'] = token.access_token
# We don't need id_token if it's an OAuth2 request.
if self.is_authentication:
kwargs = {
"user": self.request.user,
"aud": self.client.client_id,
"nonce": self.params.nonce,
"request": self.request
}
# Include at_hash when access_token is being returned.
if 'access_token' in query_fragment:
kwargs['at_hash'] = token.at_hash
id_token_dic = create_id_token(**kwargs)
query_fragment['id_token'] = encode_id_token(id_token_dic, self.client)
token.id_token = id_token_dic
else:
id_token_dic = {}
# Store the token.
token.id_token = id_token_dic
token.save()
query_fragment['token_type'] = 'bearer'
# TODO: Create setting 'OIDC_TOKEN_EXPIRE'.
query_fragment['expires_in'] = 60 * 10
query_fragment['state'] = self.params.state if self.params.state else ''
except Exception as error:
logger.debug('[Authorize] Error when trying to create response uri: %s', error)
raise AuthorizeError(
self.params.redirect_uri,
'server_error',
self.grant_type)
uri = uri._replace(query=urlencode(query_params, doseq=True))
uri = uri._replace(fragment=urlencode(query_fragment, doseq=True))
return urlunsplit(uri)
def set_client_user_consent(self):
"""
Save the user consent given to a specific client.
Return None.
"""
date_given = timezone.now()
expires_at = date_given + timedelta(
days=settings.get('OIDC_SKIP_CONSENT_EXPIRE'))
uc, created = UserConsent.objects.get_or_create(
user=self.request.user,
client=self.client,
defaults={
'expires_at': expires_at,
'date_given': date_given,
}
)
uc.scope = self.params.scope
# Rewrite expires_at and date_given if object already exists.
if not created:
uc.expires_at = expires_at
uc.date_given = date_given
uc.save()
def client_has_user_consent(self):
"""
Check if already exists user consent for some client.
Return bool.
"""
value = False
try:
uc = UserConsent.objects.get(user=self.request.user,
client=self.client)
if (set(self.params.scope).issubset(uc.scope)) and \
not (uc.has_expired()):
value = True
except UserConsent.DoesNotExist:
pass
return value
def get_scopes_information(self):
"""
Return a list with the description of all the scopes requested.
"""
scopes = StandardScopeClaims.get_scopes_info(self.params.scope)
if settings.get('OIDC_EXTRA_SCOPE_CLAIMS'):
scopes_extra = settings.get('OIDC_EXTRA_SCOPE_CLAIMS', import_str=True).get_scopes_info(self.params.scope)
for index_extra, scope_extra in enumerate(scopes_extra):
for index, scope in enumerate(scopes[:]):
if scope_extra['scope'] == scope['scope']:
del scopes[index]
else:
scopes_extra = []
return scopes + scopes_extra