NATS TLS specify CA and client TLS authentication (#8389)

- added ability to specify CA for self-signed certificates
- added option to authenticate using client certificates
- added unit tests for nats connections

pkg/event/target/nats_test.go

@@ -0,0 +1,138 @@
+/*
+ * MinIO Cloud Storage, (C) 2019 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package target
+
+import (
+	"path"
+	"path/filepath"
+	"testing"
+
+	xnet "github.com/minio/minio/pkg/net"
+	natsserver "github.com/nats-io/nats-server/v2/test"
+)
+
+func TestNatsConnPlain(t *testing.T) {
+	opts := natsserver.DefaultTestOptions
+	opts.Port = 14222
+	s := natsserver.RunServer(&opts)
+	defer s.Shutdown()
+
+	clientConfig := &NATSArgs{
+		Enable: true,
+		Address: xnet.Host{Name: "localhost",
+			Port:      (xnet.Port(opts.Port)),
+			IsPortSet: true},
+		Subject: "test",
+	}
+	con, err := clientConfig.connectNats()
+	if err != nil {
+		t.Errorf("Could not connect to nats: %v", err)
+	}
+	defer con.Close()
+}
+
+func TestNatsConnUserPass(t *testing.T) {
+	opts := natsserver.DefaultTestOptions
+	opts.Port = 14223
+	opts.Username = "testminio"
+	opts.Password = "miniotest"
+	s := natsserver.RunServer(&opts)
+	defer s.Shutdown()
+
+	clientConfig := &NATSArgs{
+		Enable: true,
+		Address: xnet.Host{Name: "localhost",
+			Port:      (xnet.Port(opts.Port)),
+			IsPortSet: true},
+		Subject:  "test",
+		Username: opts.Username,
+		Password: opts.Password,
+	}
+
+	con, err := clientConfig.connectNats()
+	if err != nil {
+		t.Errorf("Could not connect to nats: %v", err)
+	}
+	defer con.Close()
+}
+
+func TestNatsConnToken(t *testing.T) {
+	opts := natsserver.DefaultTestOptions
+	opts.Port = 14223
+	opts.Authorization = "s3cr3t"
+	s := natsserver.RunServer(&opts)
+	defer s.Shutdown()
+
+	clientConfig := &NATSArgs{
+		Enable: true,
+		Address: xnet.Host{Name: "localhost",
+			Port:      (xnet.Port(opts.Port)),
+			IsPortSet: true},
+		Subject: "test",
+		Token:   opts.Authorization,
+	}
+
+	con, err := clientConfig.connectNats()
+	if err != nil {
+		t.Errorf("Could not connect to nats: %v", err)
+	}
+	defer con.Close()
+}
+
+func TestNatsConnTLSCustomCA(t *testing.T) {
+	s, opts := natsserver.RunServerWithConfig(filepath.Join("testdata", "nats_tls.conf"))
+	defer s.Shutdown()
+
+	clientConfig := &NATSArgs{
+		Enable: true,
+		Address: xnet.Host{Name: "localhost",
+			Port:      (xnet.Port(opts.Port)),
+			IsPortSet: true},
+		Subject:       "test",
+		Secure:        true,
+		CertAuthority: path.Join("testdata", "certs", "root_ca_cert.pem"),
+	}
+
+	con, err := clientConfig.connectNats()
+	if err != nil {
+		t.Errorf("Could not connect to nats: %v", err)
+	}
+	defer con.Close()
+}
+
+func TestNatsConnTLSClientAuthorization(t *testing.T) {
+	s, opts := natsserver.RunServerWithConfig(filepath.Join("testdata", "nats_tls_client_cert.conf"))
+	defer s.Shutdown()
+
+	clientConfig := &NATSArgs{
+		Enable: true,
+		Address: xnet.Host{Name: "localhost",
+			Port:      (xnet.Port(opts.Port)),
+			IsPortSet: true},
+		Subject:       "test",
+		Secure:        true,
+		CertAuthority: path.Join("testdata", "certs", "root_ca_cert.pem"),
+		ClientCert:    path.Join("testdata", "certs", "nats_client_cert.pem"),
+		ClientKey:     path.Join("testdata", "certs", "nats_client_key.pem"),
+	}
+
+	con, err := clientConfig.connectNats()
+	if err != nil {
+		t.Errorf("Could not connect to nats: %v", err)
+	}
+	defer con.Close()
+}