django-oidc-provider/openid_provider/lib/endpoints/authorize.py

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from datetime import timedelta
from django.utils import timezone
from openid_provider.lib.errors import *
from openid_provider.lib.utils.params import *
from openid_provider.lib.utils.token import *
from openid_provider.models import *
import uuid
class AuthorizeEndpoint(object):
def __init__(self, request):
self.request = request
self.params = Params()
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# Because in this endpoint we handle both GET
# and POST request.
self.query_dict = (self.request.POST if self.request.method == 'POST'
else self.request.GET)
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']:
self.grant_type = 'implicit'
self._extract_implicit_params()
else:
self.grant_type = None
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
'''
self.params.client_id = self.query_dict.get('client_id', '')
self.params.redirect_uri = self.query_dict.get('redirect_uri', '')
self.params.response_type = self.query_dict.get('response_type', '')
self.params.scope = self.query_dict.get('scope', '').split()
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self.params.state = self.query_dict.get('state', '')
def _extract_implicit_params(self):
'''
Get specific params used by the Implicit Flow.
See: http://openid.net/specs/openid-connect-core-1_0.html#ImplicitAuthRequest
'''
self.params.nonce = self.query_dict.get('nonce', '')
def validate_params(self):
if not self.params.redirect_uri:
raise RedirectUriError()
if not ('openid' in self.params.scope):
raise AuthorizeError(
self.params.redirect_uri,
'invalid_scope',
self.grant_type)
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try:
self.client = Client.objects.get(client_id=self.params.client_id)
if not (self.params.redirect_uri in self.client.redirect_uris):
raise RedirectUriError()
if not (self.grant_type) or \
not (self.params.response_type == self.client.response_type):
raise AuthorizeError(
self.params.redirect_uri,
'unsupported_response_type',
self.grant_type)
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except Client.DoesNotExist:
raise ClientIdError()
def create_response_uri(self, allow):
if not allow:
raise AuthorizeError(
self.params.redirect_uri,
'access_denied',
self.grant_type)
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try:
self.validate_params()
if (self.grant_type == 'authorization_code'):
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code = Code()
code.user = self.request.user
code.client = self.client
code.code = uuid.uuid4().hex
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code.expires_at = timezone.now() + timedelta(seconds=60*10) # TODO: Add this into settings.
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code.scope = self.params.scope
code.save()
uri = self.params.redirect_uri + '?code={0}'.format(code.code)
else: # Implicit Flow
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id_token_dic = create_id_token_dic(
self.request.user,
'http://localhost:8000', # TODO: Add this into settings.
self.client.client_id)
token = create_token(
user=self.request.user,
client=self.client,
id_token_dic=id_token_dic,
scope=self.params.scope)
# Store the token.
token.save()
id_token = encode_id_token(id_token_dic, self.client.client_secret)
# TODO: Check if response_type is 'id_token token' then
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# add access_token to the fragment.
uri = self.params.redirect_uri + \
'#token_type={0}&id_token={1}&expires_in={2}'.format(
'bearer',
id_token,
60*10)
except:
raise AuthorizeError(
self.params.redirect_uri,
'server_error',
self.grant_type)
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# Add state if present.
uri = uri + ('&state={0}'.format(self.params.state)
if self.params.state else '')
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return uri