afc3a60ee7
This is required by response type "id_token token", but can be used by other flows if they choose.
232 lines
8.8 KiB
Python
232 lines
8.8 KiB
Python
import logging
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try:
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from urllib import urlencode
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from urlparse import urlsplit, parse_qs, urlunsplit
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except ImportError:
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from urllib.parse import urlsplit, parse_qs, urlunsplit, urlencode
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from django.utils import timezone
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from oidc_provider.lib.claims import StandardScopeClaims
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from oidc_provider.lib.errors import *
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from oidc_provider.lib.utils.params import *
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from oidc_provider.lib.utils.token import *
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from oidc_provider.models import *
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from oidc_provider import settings
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logger = logging.getLogger(__name__)
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class AuthorizeEndpoint(object):
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def __init__(self, request):
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self.request = request
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self.params = Params()
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self._extract_params()
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# Determine which flow to use.
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if self.params.response_type in ['code']:
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self.grant_type = 'authorization_code'
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elif self.params.response_type in ['id_token', 'id_token token', 'token']:
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self.grant_type = 'implicit'
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else:
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self.grant_type = None
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# Determine if it's an OpenID Authentication request (or OAuth2).
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self.is_authentication = 'openid' in self.params.scope
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def _extract_params(self):
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"""
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Get all the params used by the Authorization Code Flow
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(and also for the Implicit).
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See: http://openid.net/specs/openid-connect-core-1_0.html#AuthRequest
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"""
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# Because in this endpoint we handle both GET
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# and POST request.
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query_dict = (self.request.POST if self.request.method == 'POST'
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else self.request.GET)
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self.params.client_id = query_dict.get('client_id', '')
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self.params.redirect_uri = query_dict.get('redirect_uri', '')
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self.params.response_type = query_dict.get('response_type', '')
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self.params.scope = query_dict.get('scope', '').split()
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self.params.state = query_dict.get('state', '')
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self.params.nonce = query_dict.get('nonce', '')
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self.params.prompt = query_dict.get('prompt', '')
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self.params.code_challenge = query_dict.get('code_challenge', '')
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self.params.code_challenge_method = query_dict.get('code_challenge_method', '')
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def validate_params(self):
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# Client validation.
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try:
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self.client = Client.objects.get(client_id=self.params.client_id)
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except Client.DoesNotExist:
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logger.debug('[Authorize] Invalid client identifier: %s', self.params.client_id)
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raise ClientIdError()
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# Redirect URI validation.
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if self.is_authentication and not self.params.redirect_uri:
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logger.debug('[Authorize] Missing redirect uri.')
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raise RedirectUriError()
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clean_redirect_uri = urlsplit(self.params.redirect_uri)
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clean_redirect_uri = urlunsplit(clean_redirect_uri._replace(query=''))
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if not (clean_redirect_uri in self.client.redirect_uris):
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logger.debug('[Authorize] Invalid redirect uri: %s', self.params.redirect_uri)
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raise RedirectUriError()
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# Grant type validation.
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if not self.grant_type:
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logger.debug('[Authorize] Invalid response type: %s', self.params.response_type)
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raise AuthorizeError(self.params.redirect_uri, 'unsupported_response_type',
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self.grant_type)
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# Nonce parameter validation.
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if self.is_authentication and self.grant_type == 'implicit' and not self.params.nonce:
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raise AuthorizeError(self.params.redirect_uri, 'invalid_request',
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self.grant_type)
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# Response type parameter validation.
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if self.is_authentication and self.params.response_type != self.client.response_type:
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raise AuthorizeError(self.params.redirect_uri, 'invalid_request',
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self.grant_type)
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# PKCE validation of the transformation method.
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if self.params.code_challenge:
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if not (self.params.code_challenge_method in ['plain', 'S256']):
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raise AuthorizeError(self.params.redirect_uri, 'invalid_request', self.grant_type)
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def create_response_uri(self):
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uri = urlsplit(self.params.redirect_uri)
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query_params = parse_qs(uri.query)
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query_fragment = parse_qs(uri.fragment)
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try:
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if self.grant_type == 'authorization_code':
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code = create_code(
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user=self.request.user,
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client=self.client,
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scope=self.params.scope,
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nonce=self.params.nonce,
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is_authentication=self.is_authentication,
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code_challenge=self.params.code_challenge,
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code_challenge_method=self.params.code_challenge_method)
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code.save()
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query_params['code'] = code.code
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query_params['state'] = self.params.state if self.params.state else ''
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elif self.grant_type == 'implicit':
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token = create_token(
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user=self.request.user,
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client=self.client,
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scope=self.params.scope)
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# Check if response_type is an OpenID request with value 'id_token token'
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# or it's an OAuth2 Implicit Flow request.
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if self.params.response_type in ['id_token token', 'token']:
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query_fragment['access_token'] = token.access_token
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# We don't need id_token if it's an OAuth2 request.
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if self.is_authentication:
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kwargs = {
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"user": self.request.user,
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"aud": self.client.client_id,
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"nonce": self.params.nonce,
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"request": self.request
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}
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# Include at_hash when access_token is being returned.
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if 'access_token' in query_fragment:
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kwargs['at_hash'] = token.at_hash
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id_token_dic = create_id_token(**kwargs)
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query_fragment['id_token'] = encode_id_token(id_token_dic, self.client)
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token.id_token = id_token_dic
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else:
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id_token_dic = {}
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# Store the token.
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token.id_token = id_token_dic
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token.save()
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query_fragment['token_type'] = 'bearer'
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# TODO: Create setting 'OIDC_TOKEN_EXPIRE'.
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query_fragment['expires_in'] = 60 * 10
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query_fragment['state'] = self.params.state if self.params.state else ''
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except Exception as error:
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logger.debug('[Authorize] Error when trying to create response uri: %s', error)
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raise AuthorizeError(
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self.params.redirect_uri,
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'server_error',
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self.grant_type)
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uri = uri._replace(query=urlencode(query_params, doseq=True))
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uri = uri._replace(fragment=urlencode(query_fragment, doseq=True))
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return urlunsplit(uri)
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def set_client_user_consent(self):
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"""
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Save the user consent given to a specific client.
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Return None.
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"""
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date_given = timezone.now()
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expires_at = date_given + timedelta(
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days=settings.get('OIDC_SKIP_CONSENT_EXPIRE'))
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uc, created = UserConsent.objects.get_or_create(
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user=self.request.user,
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client=self.client,
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defaults={
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'expires_at': expires_at,
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'date_given': date_given,
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}
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)
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uc.scope = self.params.scope
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# Rewrite expires_at and date_given if object already exists.
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if not created:
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uc.expires_at = expires_at
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uc.date_given = date_given
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uc.save()
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def client_has_user_consent(self):
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"""
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Check if already exists user consent for some client.
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Return bool.
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"""
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value = False
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try:
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uc = UserConsent.objects.get(user=self.request.user,
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client=self.client)
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if (set(self.params.scope).issubset(uc.scope)) and \
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not (uc.has_expired()):
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value = True
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except UserConsent.DoesNotExist:
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pass
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return value
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def get_scopes_information(self):
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"""
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Return a list with the description of all the scopes requested.
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"""
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scopes = StandardScopeClaims.get_scopes_info(self.params.scope)
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if settings.get('OIDC_EXTRA_SCOPE_CLAIMS'):
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scopes_extra = settings.get('OIDC_EXTRA_SCOPE_CLAIMS', import_str=True).get_scopes_info(self.params.scope)
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for index_extra, scope_extra in enumerate(scopes_extra):
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for index, scope in enumerate(scopes[:]):
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if scope_extra['scope'] == scope['scope']:
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del scopes[index]
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else:
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scopes_extra = []
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return scopes + scopes_extra
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