Batch certificate summary lookups

server/packages/kca-app/src/kca/routes/certificates.py

@@ -39,7 +39,7 @@ from ..service import (
     save_key_once,
     search_text,
     serialize_certificate_detail,
-    serialize_certificate_summary,
+    serialize_certificate_summaries,
     serialize_revocation,
     serialize_template_summary,
     serialize_crl_detail,
@@ -74,7 +74,7 @@ def register(app: KayaApp, kca: "Kca") -> None:
         if vault is None:
             return
         rows = await Certificate.filter(vault_id=vault.id).order_by("name", "id")
-        await send_json(ctx, 200, {"results": [await serialize_certificate_summary(c) for c in rows]})
+        await send_json(ctx, 200, {"results": await serialize_certificate_summaries(rows)})
 
     @app.POST("/api/vaults/${vault_id}/certificates")
     @operation(summary="Issue a certificate", tags=["certificates"])

server/packages/kca-app/src/kca/service.py

@@ -220,23 +220,27 @@ async def revoked_for(cert: Certificate) -> Optional[CertificateRevocation]:
     return await CertificateRevocation.get_or_none(ca_id=cert.issuer_id, serial_hex=cert.serial_hex)
 
 
-async def serialize_certificate_summary(cert: Certificate) -> Dict[str, Any]:
-    revoked = await revoked_for(cert)
+def _certificate_summary(
+    cert: Certificate,
+    revoked: Optional[CertificateRevocation],
+    has_private_key: bool,
+) -> Dict[str, Any]:
+    parsed = cert_core.parse_certificate(bytes(cert.cert_der))
     return {
         "id": str(cert.id),
         "name": cert.name,
         "comment": cert.comment,
         "source": cert.source,
-        "subject": name_core.one_line(cert_core.parse_certificate(bytes(cert.cert_der)).subject),
+        "subject": name_core.one_line(parsed.subject),
         "issuer_id": str(cert.issuer_id) if cert.issuer_id else None,
-        "issuer_name": name_core.one_line(cert_core.parse_certificate(bytes(cert.cert_der)).issuer),
+        "issuer_name": name_core.one_line(parsed.issuer),
         "serial_hex": cert.serial_hex,
         "not_before": iso(cert.not_before),
         "not_after": iso(cert.not_after),
         "no_expiration": cert.no_expiration,
         "is_ca": cert.is_ca,
         "path_length": cert.path_length,
-        "has_private_key": bool(cert.key_id and await Key.filter(id=cert.key_id, has_private=True).exists()),
+        "has_private_key": has_private_key,
         "revoked": revoked is not None,
         "revoked_at": iso(revoked.revoked_at) if revoked else None,
         "fingerprint_sha256": cert.fingerprint_sha256,
@@ -247,6 +251,52 @@ async def serialize_certificate_summary(cert: Certificate) -> Dict[str, Any]:
     }
 
 
+async def serialize_certificate_summary(cert: Certificate) -> Dict[str, Any]:
+    revoked = await revoked_for(cert)
+    has_private_key = bool(
+        cert.key_id and await Key.filter(id=cert.key_id, has_private=True).exists()
+    )
+    return _certificate_summary(cert, revoked, has_private_key)
+
+
+async def serialize_certificate_summaries(
+    certificates: Sequence[Certificate],
+) -> List[Dict[str, Any]]:
+    """Serialize a certificate list with constant-count revocation/key queries."""
+    if not certificates:
+        return []
+
+    issuer_ids = {cert.issuer_id for cert in certificates if cert.issuer_id is not None}
+    serial_hexes = {cert.serial_hex for cert in certificates if cert.issuer_id is not None}
+    revocations = (
+        await CertificateRevocation.filter(
+            ca_id__in=issuer_ids,
+            serial_hex__in=serial_hexes,
+        )
+        if issuer_ids
+        else []
+    )
+    revoked_by_certificate = {
+        (revocation.ca_id, revocation.serial_hex): revocation
+        for revocation in revocations
+    }
+
+    key_ids = {cert.key_id for cert in certificates if cert.key_id is not None}
+    private_key_ids = (
+        set(await Key.filter(id__in=key_ids, has_private=True).values_list("id", flat=True))
+        if key_ids
+        else set()
+    )
+    return [
+        _certificate_summary(
+            cert,
+            revoked_by_certificate.get((cert.issuer_id, cert.serial_hex)),
+            cert.key_id in private_key_ids,
+        )
+        for cert in certificates
+    ]
+
+
 async def chain_for_certificate(cert: Certificate, vault: Vault) -> List[Certificate]:
     chain = [cert]
     current = cert
@@ -1591,6 +1641,7 @@ __all__ = [
     "save_key",
     "save_key_once",
     "serialize_certificate_detail",
+    "serialize_certificate_summaries",
     "serialize_certificate_summary",
     "serialize_crl_detail",
     "serialize_crl_summary",

server/tests/test_routes_extra.py

@@ -604,6 +604,77 @@ class ExtendedRouteTests(unittest.TestCase):
                 assert response.json()["reason"] == "superseded"
 
 
+class CertificateListTests(unittest.TestCase):
+    @async_test
+    async def test_summaries_batch_revocation_and_private_key_queries(self) -> None:
+        from unittest.mock import patch
+
+        from kca import service
+        from kca.models import CertificateRevocation, Key
+
+        async with api_client() as client:
+            with oidc_user("alice"):
+                vault_id = await _vault(client)
+                url = f"/api/vaults/{vault_id}/certificates"
+
+                with (
+                    patch.object(
+                        CertificateRevocation,
+                        "filter",
+                        wraps=CertificateRevocation.filter,
+                    ) as revocation_filter,
+                    patch.object(Key, "filter", wraps=Key.filter) as key_filter,
+                ):
+                    response = await client.get(url)
+                assert response.status_code == 200, response.text
+                assert response.json()["results"] == []
+                revocation_filter.assert_not_called()
+                key_filter.assert_not_called()
+
+                ca_key = await _key(client, vault_id, "list ca")
+                ca = await _cert(client, vault_id, ca_key["id"], "List CA", ca=True)
+                leaf_key = await _key(client, vault_id, "list leaf")
+                leaf = await _cert(
+                    client,
+                    vault_id,
+                    leaf_key["id"],
+                    "List Leaf",
+                    signer_id=ca["id"],
+                )
+                response = await client.post(
+                    f"/api/vaults/{vault_id}/certificates/{leaf['id']}/revoke",
+                    json={"reason": "superseded"},
+                )
+                assert response.status_code == 200, response.text
+
+                with (
+                    patch.object(
+                        CertificateRevocation,
+                        "filter",
+                        wraps=CertificateRevocation.filter,
+                    ) as revocation_filter,
+                    patch.object(Key, "filter", wraps=Key.filter) as key_filter,
+                    patch.object(
+                        service,
+                        "revoked_for",
+                        side_effect=AssertionError("per-certificate revocation query"),
+                    ) as single_revocation,
+                ):
+                    response = await client.get(url)
+
+                assert response.status_code == 200, response.text
+                revocation_filter.assert_called_once()
+                key_filter.assert_called_once()
+                single_revocation.assert_not_called()
+                summaries = {row["id"]: row for row in response.json()["results"]}
+                assert summaries[ca["id"]]["revoked"] is False
+                assert summaries[ca["id"]]["revoked_at"] is None
+                assert summaries[ca["id"]]["has_private_key"] is True
+                assert summaries[leaf["id"]]["revoked"] is True
+                assert summaries[leaf["id"]]["revoked_at"] is not None
+                assert summaries[leaf["id"]]["has_private_key"] is True
+
+
 class SerialRenewalTests(unittest.TestCase):
     @async_test
     async def test_explicit_serial_must_be_unique_and_not_revoked(self) -> None: