Refactor TLS code

internal/tls/tls_web.go

@@ -0,0 +1,102 @@
+/*
+© Copyright IBM Corporation 2019
+
+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 tls
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/ibm-messaging/mq-container/internal/command"
+	"github.com/ibm-messaging/mq-container/internal/keystore"
+)
+
+// webServerKeystoreName is the name of the web server Keystore
+const webServerKeystoreName = "default.p12"
+
+// ConfigureWebTLS configures TLS for the web server
+func ConfigureWebTLS(keyLabel string) error {
+
+	// Return immediately if we have no certificate to use as identity
+	if keyLabel == "" && os.Getenv("MQ_GENERATE_CERTIFICATE_HOSTNAME") == "" {
+		return nil
+	}
+
+	webConfigDir := "/etc/mqm/web/installations/Installation1/servers/mqweb"
+	tls := "tls.xml"
+
+	tlsConfig := filepath.Join(webConfigDir, tls)
+	newTLSConfig := filepath.Join(webConfigDir, tls+".tpl")
+
+	err := os.Remove(tlsConfig)
+	if err != nil {
+		return fmt.Errorf("Failed to delete file %s: %v", tlsConfig, err)
+	}
+
+	// Symlink here to prevent issues on restart
+	err = os.Symlink(newTLSConfig, tlsConfig)
+	if err != nil {
+		return fmt.Errorf("Failed to create symlink %s->%s: %v", newTLSConfig, tlsConfig, err)
+	}
+	mqmUID, mqmGID, err := command.LookupMQM()
+	if err != nil {
+		return fmt.Errorf("Failed to find mqm user or group: %v", err)
+	}
+	err = os.Chown(tlsConfig, mqmUID, mqmGID)
+	if err != nil {
+		return fmt.Errorf("Failed to change ownership of %s to mqm: %v", tlsConfig, err)
+	}
+
+	return nil
+}
+
+// ConfigureWebKeyStore configures the Web Keystore
+func ConfigureWebKeystore(p12Truststore KeyStoreData) (string, error) {
+	webKeystore := filepath.Join(keystoreDir, webServerKeystoreName)
+
+	// Check if a new self-signed certificate should be generated
+	genHostName := os.Getenv("MQ_GENERATE_CERTIFICATE_HOSTNAME")
+	if genHostName != "" {
+
+		// Create the Web Keystore
+		newWebKeystore := keystore.NewPKCS12KeyStore(webKeystore, p12Truststore.Password)
+		err := newWebKeystore.Create()
+		if err != nil {
+			return "", fmt.Errorf("Failed to create Web Keystore %s: %v", webKeystore, err)
+		}
+
+		// Generate a new self-signed certificate in the Web Keystore
+		err = newWebKeystore.CreateSelfSignedCertificate("default", fmt.Sprintf("CN=%s", genHostName), genHostName)
+		if err != nil {
+			return "", fmt.Errorf("Failed to generate certificate in Web Keystore %s with DN of 'CN=%s': %v", webKeystore, genHostName, err)
+		}
+
+	} else {
+		// Check Web Keystore already exists
+		_, err := os.Stat(webKeystore)
+		if err != nil {
+			return "", fmt.Errorf("Failed to find existing Web Keystore %s: %v", webKeystore, err)
+		}
+	}
+
+	// Check Web Truststore already exists
+	_, err := os.Stat(p12Truststore.Keystore.Filename)
+	if err != nil {
+		return "", fmt.Errorf("Failed to find existing Web Truststore %s: %v", p12Truststore.Keystore.Filename, err)
+	}
+
+	return webServerKeystoreName, nil
+}