Implement refresh instance

2 files changed, 67 insertions, 17 deletions

diff --git a/athenz-identity-provider-service/src/main/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiHandler.java b/athenz-identity-provider-service/src/main/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiHandler.java
index ba4f0ce932c..b2120f24160 100644
--- a/athenz-identity-provider-service/src/main/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiHandler.java
+++ b/athenz-identity-provider-service/src/main/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiHandler.java
@@ -25,12 +25,14 @@ import java.security.PrivateKey;
 import java.security.cert.X509Certificate;
 import java.time.Clock;
 import java.util.Optional;
+import java.util.function.Function;
 import java.util.logging.Level;
 
 /**
  * REST API for issuing and refreshing node certificates in a hosted Vespa system.
  *
  * The API implements the following subset of methods from the Athenz ZTS REST API:
+ *
  * - Instance registration
  * - Instance refresh
  *
@@ -59,12 +61,12 @@ public class CertificateAuthorityApiHandler extends LoggingRequestHandler {
         try {
             switch (request.getMethod()) {
                 case POST: return handlePost(request);
-                default: return ErrorResponse.methodNotAllowed("Method '" + request.getMethod() + "' is unsupported");
+                default: return ErrorResponse.methodNotAllowed("Method " + request.getMethod() + " is unsupported");
             }
         } catch (IllegalArgumentException e) {
-            return ErrorResponse.badRequest(Exceptions.toMessageString(e));
+            return ErrorResponse.badRequest(request.getMethod() + " " + request.getUri() + " failed: " + Exceptions.toMessageString(e));
         } catch (RuntimeException e) {
-            log.log(Level.WARNING, "Unexpected error handling '" + request.getUri() + "'", e);
+            log.log(Level.WARNING, "Unexpected error handling " + request.getMethod() + " " + request.getUri(), e);
             return ErrorResponse.internalServerError(Exceptions.toMessageString(e));
         }
     }
@@ -72,13 +74,12 @@ public class CertificateAuthorityApiHandler extends LoggingRequestHandler {
     private HttpResponse handlePost(HttpRequest request) {
         Path path = new Path(request.getUri());
         if (path.matches("/ca/v1/instance/")) return registerInstance(request);
-        // TODO: Implement refresh
+        if (path.matches("/ca/v1/instance/{provider}/{domain}/{service}/{instanceId}")) return refreshInstance(request, path.get("provider"), path.get("service"), path.get("instanceId"));
         return ErrorResponse.notFoundError("Nothing at " + path);
     }
 
     private HttpResponse registerInstance(HttpRequest request) {
-        var body = slimeFromRequest(request);
-        var instanceRegistration = InstanceSerializer.registrationFromSlime(body);
+        var instanceRegistration = deserializeRequest(request, InstanceSerializer::registrationFromSlime);
         var certificate = certificates.create(instanceRegistration.csr(), caCertificate(), caPrivateKey());
         var instanceId = Certificates.extractDnsName(instanceRegistration.csr());
         var identity = new InstanceIdentity(instanceRegistration.provider(), instanceRegistration.service(), instanceId,
@@ -86,6 +87,18 @@ public class CertificateAuthorityApiHandler extends LoggingRequestHandler {
         return new SlimeJsonResponse(InstanceSerializer.identityToSlime(identity));
     }
 
+    private HttpResponse refreshInstance(HttpRequest request, String provider, String service, String instanceId) {
+        var instanceRefresh = deserializeRequest(request, InstanceSerializer::refreshFromSlime);
+        var instanceIdFromCsr = Certificates.extractDnsName(instanceRefresh.csr());
+        if (!instanceIdFromCsr.equals(instanceId)) {
+            throw new IllegalArgumentException("Mismatched instance ID and SAN DNS name [instanceId=" + instanceId +
+                                               ",dnsName=" + instanceIdFromCsr + "]");
+        }
+        var certificate = certificates.create(instanceRefresh.csr(), caCertificate(), caPrivateKey());
+        var identity = new InstanceIdentity(provider, service, instanceIdFromCsr, Optional.of(certificate));
+        return new SlimeJsonResponse(InstanceSerializer.identityToSlime(identity));
+    }
+
     /** Returns CA certificate from secret store */
     private X509Certificate caCertificate() {
         var keyName = String.format("vespa.external.%s.configserver.ca.cert.cert", system.value().toLowerCase());
@@ -98,9 +111,10 @@ public class CertificateAuthorityApiHandler extends LoggingRequestHandler {
         return KeyUtils.fromPemEncodedPrivateKey(secretStore.getSecret(keyName));
     }
 
-    private static Slime slimeFromRequest(HttpRequest request) {
+    private static <T> T deserializeRequest(HttpRequest request, Function<Slime, T> serializer) {
         try {
-            return SlimeUtils.jsonToSlime(request.getData().readAllBytes());
+            var slime = SlimeUtils.jsonToSlime(request.getData().readAllBytes());
+            return serializer.apply(slime);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
diff --git a/athenz-identity-provider-service/src/test/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiTest.java b/athenz-identity-provider-service/src/test/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiTest.java
index 4393c3a25b9..a1d708a1107 100644
--- a/athenz-identity-provider-service/src/test/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiTest.java
+++ b/athenz-identity-provider-service/src/test/java/com/yahoo/vespa/hosted/ca/restapi/CertificateAuthorityApiTest.java
@@ -35,9 +35,9 @@ public class CertificateAuthorityApiTest extends ContainerTester {
     public void register_instance() throws Exception {
         // POST instance registration
         var csr = CertificateTester.createCsr("node1.example.com");
-        assertRegistration(new Request("http://localhost:12345/ca/v1/instance/",
-                                       instanceRegistrationJson(csr),
-                                       Request.Method.POST));
+        assertIdentityResponse(new Request("http://localhost:12345/ca/v1/instance/",
+                                           instanceRegistrationJson(csr),
+                                           Request.Method.POST));
 
         // POST instance registration with ZTS client
         var ztsClient = new DefaultZtsClient(URI.create("http://localhost:12345/ca/v1/"), SSLContext.getDefault());
@@ -49,9 +49,26 @@ public class CertificateAuthorityApiTest extends ContainerTester {
     }
 
     @Test
-    public void invalid_register_instance() {
+    public void refresh_instance() throws Exception {
+        // POST instance refresh
+        var csr = CertificateTester.createCsr("node1.example.com");
+        assertIdentityResponse(new Request("http://localhost:12345/ca/v1/instance/vespa.external.provider_prod_us-north-1/vespa.external/tenant/node1.example.com",
+                                           instanceRefreshJson(csr),
+                                           Request.Method.POST));
+
+        // POST instance refresh with ZTS client
+        var ztsClient = new DefaultZtsClient(URI.create("http://localhost:12345/ca/v1/"), SSLContext.getDefault());
+        var instanceIdentity = ztsClient.refreshInstance(new AthenzService("vespa.external", "provider_prod_us-north-1"),
+                                                          new AthenzService("vespa.external", "tenant"),
+                                                          "node1.example.com",
+                                                          csr);
+        assertEquals("CN=Vespa CA", instanceIdentity.certificate().getIssuerX500Principal().getName());
+    }
+
+    @Test
+    public void invalid_requests() {
         // POST instance registration with missing fields
-        assertResponse(400, "{\"error-code\":\"BAD_REQUEST\",\"message\":\"Missing required field 'provider'\"}",
+        assertResponse(400, "{\"error-code\":\"BAD_REQUEST\",\"message\":\"POST http://localhost:12345/ca/v1/instance/ failed: Missing required field 'provider'\"}",
                        new Request("http://localhost:12345/ca/v1/instance/",
                                    new byte[0],
                                    Request.Method.POST));
@@ -61,7 +78,20 @@ public class CertificateAuthorityApiTest extends ContainerTester {
         var request = new Request("http://localhost:12345/ca/v1/instance/",
                                   instanceRegistrationJson(csr),
                                   Request.Method.POST);
-        assertResponse(400, "{\"error-code\":\"BAD_REQUEST\",\"message\":\"DNS name not found in CSR\"}", request);
+        assertResponse(400, "{\"error-code\":\"BAD_REQUEST\",\"message\":\"POST http://localhost:12345/ca/v1/instance/ failed: DNS name not found in CSR\"}", request);
+
+        // POST instance refresh with missing field
+        assertResponse(400, "{\"error-code\":\"BAD_REQUEST\",\"message\":\"POST http://localhost:12345/ca/v1/instance/vespa.external.provider_prod_us-north-1/vespa.external/tenant/node1.example.com failed: Missing required field 'csr'\"}",
+                       new Request("http://localhost:12345/ca/v1/instance/vespa.external.provider_prod_us-north-1/vespa.external/tenant/node1.example.com",
+                                   new byte[0],
+                                   Request.Method.POST));
+
+        // POST instance refresh where instanceId does not match CSR dnsName
+        csr = CertificateTester.createCsr("node1.example.com");
+        assertResponse(400, "{\"error-code\":\"BAD_REQUEST\",\"message\":\"POST http://localhost:12345/ca/v1/instance/vespa.external.provider_prod_us-north-1/vespa.external/tenant/node2.example.com failed: Mismatched instance ID and SAN DNS name [instanceId=node2.example.com,dnsName=node1.example.com]\"}",
+                       new Request("http://localhost:12345/ca/v1/instance/vespa.external.provider_prod_us-north-1/vespa.external/tenant/node2.example.com",
+                                   instanceRefreshJson(csr),
+                                   Request.Method.POST));
     }
 
     private void setCaCertificateAndKey() {
@@ -72,11 +102,11 @@ public class CertificateAuthorityApiTest extends ContainerTester {
                      .setSecret("vespa.external.main.configserver.ca.key.key", privateKeyPem);
     }
 
-    private void assertRegistration(Request request) {
+    private void assertIdentityResponse(Request request) {
         assertResponse(200, (body) -> {
             var slime = SlimeUtils.jsonToSlime(body);
             var root = slime.get();
-            assertEquals("provider_prod_us-north-1", root.field("provider").asString());
+            assertEquals("vespa.external.provider_prod_us-north-1", root.field("provider").asString());
             assertEquals("tenant", root.field("service").asString());
             assertEquals("node1.example.com", root.field("instanceId").asString());
             var pemEncodedCertificate = root.field("x509Certificate").asString();
@@ -86,10 +116,16 @@ public class CertificateAuthorityApiTest extends ContainerTester {
         }, request);
     }
 
+    private static byte[] instanceRefreshJson(Pkcs10Csr csr) {
+        var csrPem = Pkcs10CsrUtils.toPem(csr);
+        var json  = "{\"csr\": \"" + csrPem + "\"}";
+        return json.getBytes(StandardCharsets.UTF_8);
+    }
+
     private static byte[] instanceRegistrationJson(Pkcs10Csr csr) {
         var csrPem = Pkcs10CsrUtils.toPem(csr);
         var json  = "{\n" +
-               "  \"provider\": \"provider_prod_us-north-1\",\n" +
+               "  \"provider\": \"vespa.external.provider_prod_us-north-1\",\n" +
                "  \"domain\": \"vespa.external\",\n" +
                "  \"service\": \"tenant\",\n" +
                "  \"attestationData\": \"identity document generated by config server\",\n" +