An add_on that allows adding extra arguments to a response.

src/oidcop/endpoint_context.py

@@ -148,6 +148,7 @@ def __init__(
 
         # Default values, to be changed below depending on configuration
         # arguments for endpoints add-ons
+        self.add_on = {}
         self.args = {}
         self.authn_broker = None
         self.authz = None

src/oidcop/oauth2/add_on/extra_args.py

@@ -0,0 +1,31 @@
+def pre_construct(response_args, request, endpoint_context, **kwargs):
+    """
+    Add extra arguments to the request.
+
+    :param response_args:
+    :param request:
+    :param endpoint_context:
+    :param kwargs:
+    :return:
+    """
+
+    _extra = endpoint_context.add_on.get("extra_args")
+    if _extra:
+        for arg, _param in _extra.items():
+            _val = endpoint_context.get(_param)
+            if _val:
+                request[arg] = _val
+
+    return request
+
+
+def add_support(endpoint, **kwargs):
+    #
+    _added = False
+    for endpoint_name in list(kwargs.keys()):
+        _endp = endpoint[endpoint_name]
+        _endp.pre_construct.append(pre_construct)
+
+        if _added is False:
+            _endp.server_get("endpoint_context").add_on["extra_args"] = kwargs
+            _added = True

tests/test_61_add_on.py

@@ -0,0 +1,169 @@
+import os
+
+from cryptojwt.jwk.ec import ECKey
+from cryptojwt.jwk.ec import new_ec_key
+from cryptojwt.jws.jws import factory
+from cryptojwt.key_jar import init_key_jar
+from oidcmsg.oauth2 import AccessTokenRequest
+from oidcmsg.oauth2 import AuthorizationRequest
+from oidcmsg.time_util import utc_time_sans_frac
+
+from oidcop.authn_event import create_authn_event
+import pytest
+
+from oidcop import user_info
+from oidcop.client_authn import verify_client
+from oidcop.configure import OPConfiguration
+from oidcop.oauth2.authorization import Authorization
+from oidcop.oidc.token import Token
+from oidcop.server import Server
+from oidcop.user_authn.authn_context import INTERNETPROTOCOLPASSWORD
+
+
+KEYDEFS = [
+    {"type": "RSA", "key": "", "use": ["sig"]},
+    {"type": "EC", "crv": "P-256", "use": ["sig"]},
+]
+
+ISSUER = "https://example.com/"
+
+KEYJAR = init_key_jar(key_defs=KEYDEFS, issuer_id=ISSUER)
+KEYJAR.import_jwks(KEYJAR.export_jwks(True, ISSUER), "")
+
+RESPONSE_TYPES_SUPPORTED = [
+    ["code"],
+    ["token"],
+    ["id_token"],
+    ["code", "token"],
+    ["code", "id_token"],
+    ["id_token", "token"],
+    ["code", "token", "id_token"],
+    ["none"],
+]
+
+CAPABILITIES = {
+    "response_types_supported": [" ".join(x) for x in RESPONSE_TYPES_SUPPORTED],
+    "token_endpoint_auth_methods_supported": [
+        "client_secret_post",
+        "client_secret_basic",
+        "client_secret_jwt",
+        "private_key_jwt",
+    ],
+    "response_modes_supported": ["query", "fragment", "form_post"],
+    "subject_types_supported": ["public", "pairwise", "ephemeral"],
+    "grant_types_supported": [
+        "authorization_code",
+        "implicit",
+        "urn:ietf:params:oauth:grant-type:jwt-bearer",
+    ],
+    "claim_types_supported": ["normal", "aggregated", "distributed"],
+    "claims_parameter_supported": True,
+    "request_parameter_supported": True,
+    "request_uri_parameter_supported": True,
+}
+
+AUTH_REQ = AuthorizationRequest(
+    client_id="client_1",
+    redirect_uri="https://example.com/cb",
+    scope=["openid"],
+    state="STATE",
+    response_type="code",
+)
+
+BASEDIR = os.path.abspath(os.path.dirname(__file__))
+
+
+class TestEndpoint(object):
+    @pytest.fixture(autouse=True)
+    def create_endpoint(self):
+        conf = {
+            "issuer": ISSUER,
+            "httpc_params": {"verify": False, "timeout": 1},
+            "capabilities": CAPABILITIES,
+            "add_on": {
+                "extra_args": {
+                    "function": "oidcop.oauth2.add_on.extra_args.add_support",
+                    "kwargs": {
+                        "authorization": {"iss": "issuer"}
+                    }
+                },
+            },
+            "keys": {"uri_path": "jwks.json", "key_defs": KEYDEFS},
+            "token_handler_args": {
+                "jwks_file": "private/token_jwks.json",
+                "code": {"lifetime": 600},
+                "token": {
+                    "class": "oidcop.token.jwt_token.JWTToken",
+                    "kwargs": {
+                        "lifetime": 3600,
+                        "base_claims": {"eduperson_scoped_affiliation": None},
+                        "add_claims_by_scope": True,
+                        "aud": ["https://example.org/appl"],
+                    },
+                },
+                "refresh": {
+                    "class": "oidcop.token.jwt_token.JWTToken",
+                    "kwargs": {"lifetime": 3600, "aud": ["https://example.org/appl"], },
+                },
+                "id_token": {
+                    "class": "oidcop.token.id_token.IDToken",
+                    "kwargs": {
+                        "base_claims": {
+                            "email": {"essential": True},
+                            "email_verified": {"essential": True},
+                        }
+                    },
+                },
+            },
+            "endpoint": {
+                "authorization": {
+                    "path": "{}/authorization",
+                    "class": Authorization,
+                    "kwargs": {},
+                },
+                "token": {
+                    "path": "{}/token",
+                    "class": Token,
+                    "kwargs": {}},
+            },
+            "client_authn": verify_client,
+            "authentication": {
+                "anon": {
+                    "acr": INTERNETPROTOCOLPASSWORD,
+                    "class": "oidcop.user_authn.user.NoAuthn",
+                    "kwargs": {"user": "diana"},
+                }
+            },
+            "template_dir": "template",
+            "userinfo": {
+                "class": user_info.UserInfo,
+                "kwargs": {"db_file": "users.json"},
+            },
+        }
+        server = Server(OPConfiguration(conf, base_path=BASEDIR), keyjar=KEYJAR)
+        self.endpoint_context = server.endpoint_context
+        self.endpoint_context.cdb["client_1"] = {
+            "client_secret": "hemligt",
+            "redirect_uris": [("https://example.com/cb", None)],
+            "client_salt": "salted",
+            "token_endpoint_auth_method": "client_secret_post",
+            "response_types": ["code", "token", "code id_token", "id_token"],
+        }
+        self.endpoint = server.server_get("endpoint", "authorization")
+
+    def test_process_request(self):
+        _context = self.endpoint.server_get("endpoint_context")
+        assert _context.add_on["extra_args"] == {'authorization': {'iss': 'issuer'}}
+
+        _pr_resp = self.endpoint.parse_request(AUTH_REQ.to_dict())
+        _resp = self.endpoint.process_request(_pr_resp)
+        assert set(_resp.keys()) == {
+            "response_args",
+            "fragment_enc",
+            "return_uri",
+            "cookie",
+            "session_id",
+        }
+
+        assert 'iss' in _resp["response_args"]
+        assert _resp["response_args"]["iss"] == _context.issuer