feat: add authorization complete and token endpoints

tests/test_oidc/test_token.py

@@ -0,0 +1,138 @@
+import secrets
+from base64 import b64encode
+from datetime import UTC, datetime
+from urllib.parse import parse_qs, urlparse
+
+from argon2 import PasswordHasher
+from httpx import AsyncClient
+
+from fastapi_oidc_op.authn.password import PasswordService
+from fastapi_oidc_op.models import PasswordCredential, User
+
+
+def _register_test_client(client: AsyncClient) -> str:
+    app = client._transport.app  # type: ignore[union-attr]
+    oidc_server = app.state.oidc_server
+    client_secret = "test-secret-0123456789abcdef"
+    oidc_server.context.cdb["test-rp"] = {
+        "client_id": "test-rp",
+        "client_secret": client_secret,
+        "redirect_uris": [("http://localhost:9000/callback", {})],
+        "response_types_supported": ["code"],
+        "token_endpoint_auth_method": "client_secret_basic",
+        "scope": ["openid", "profile", "email"],
+        "allowed_scopes": ["openid", "profile", "email"],
+        "client_salt": secrets.token_hex(8),
+    }
+    oidc_server.keyjar.add_symmetric("test-rp", client_secret)
+    return client_secret
+
+
+async def _create_user_and_login(client: AsyncClient) -> str:
+    """Create user, log in, return userid."""
+    app = client._transport.app  # type: ignore[union-attr]
+    user_repo = app.state.user_repo
+    cred_repo = app.state.credential_repo
+
+    user = User(
+        userid="lusab-bansen",
+        username="alice",
+        email="alice@example.com",
+        email_verified=True,
+        created_at=datetime.now(UTC),
+        updated_at=datetime.now(UTC),
+    )
+    await user_repo.create(user)
+
+    svc = PasswordService(hasher=PasswordHasher(time_cost=1, memory_cost=8192))
+    await cred_repo.create_password(PasswordCredential(user_id=user.userid, password_hash=svc.hash("testpass")))
+
+    await client.post(
+        "/login/password",
+        data={"username": "alice", "password": "testpass"},
+        headers={"HX-Request": "true"},
+    )
+    return user.userid
+
+
+async def _get_authorization_code(client: AsyncClient) -> str:
+    """Run full auth flow and extract the authorization code."""
+    _register_test_client(client)
+
+    # Start authorization (unauthenticated — stores in session)
+    await client.get(
+        "/authorization",
+        params={
+            "response_type": "code",
+            "client_id": "test-rp",
+            "redirect_uri": "http://localhost:9000/callback",
+            "scope": "openid profile email",
+            "state": "test-state",
+            "nonce": "test-nonce",
+        },
+        follow_redirects=False,
+    )
+
+    # Create user and log in
+    await _create_user_and_login(client)
+
+    # Complete authorization (now authenticated, session has oidc_auth_request)
+    complete_res = await client.get("/authorization/complete", follow_redirects=False)
+    assert complete_res.status_code in (302, 303), (
+        f"Expected redirect, got {complete_res.status_code}: {complete_res.text}"
+    )
+
+    location = complete_res.headers["location"]
+    parsed = urlparse(location)
+    params = parse_qs(parsed.query)
+    assert "code" in params, f"No code in redirect: {location}"
+    return params["code"][0]
+
+
+async def test_authorization_complete_redirects_with_code(client: AsyncClient) -> None:
+    code = await _get_authorization_code(client)
+    assert len(code) > 0
+
+
+async def test_token_endpoint_exchanges_code(client: AsyncClient) -> None:
+    code = await _get_authorization_code(client)
+    client_secret = "test-secret-0123456789abcdef"
+
+    auth_header = b64encode(f"test-rp:{client_secret}".encode()).decode()
+    token_res = await client.post(
+        "/token",
+        data={
+            "grant_type": "authorization_code",
+            "code": code,
+            "redirect_uri": "http://localhost:9000/callback",
+        },
+        headers={
+            "Authorization": f"Basic {auth_header}",
+            "Content-Type": "application/x-www-form-urlencoded",
+        },
+    )
+    assert token_res.status_code == 200, f"Token endpoint failed: {token_res.text}"
+    data = token_res.json()
+    assert "access_token" in data
+    assert "id_token" in data
+    assert data["token_type"].lower() == "bearer"
+
+
+async def test_token_endpoint_invalid_code_returns_error(client: AsyncClient) -> None:
+    _register_test_client(client)
+    client_secret = "test-secret-0123456789abcdef"
+
+    auth_header = b64encode(f"test-rp:{client_secret}".encode()).decode()
+    token_res = await client.post(
+        "/token",
+        data={
+            "grant_type": "authorization_code",
+            "code": "invalid-code",
+            "redirect_uri": "http://localhost:9000/callback",
+        },
+        headers={
+            "Authorization": f"Basic {auth_header}",
+            "Content-Type": "application/x-www-form-urlencoded",
+        },
+    )
+    assert token_res.status_code == 400 or "error" in token_res.json()