Validate domain name

1 files changed, 11 insertions, 0 deletions

diff --git a/config-provisioning/src/main/java/com/yahoo/config/provision/AthenzDomain.java b/config-provisioning/src/main/java/com/yahoo/config/provision/AthenzDomain.java
index 193a02ccf26..e375716ff3c 100644
--- a/config-provisioning/src/main/java/com/yahoo/config/provision/AthenzDomain.java
+++ b/config-provisioning/src/main/java/com/yahoo/config/provision/AthenzDomain.java
@@ -1,17 +1,28 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.config.provision;
 
+import java.util.regex.Pattern;
+
 /**
  * @author mortent
  */
 public class AthenzDomain {
 
+    private static final Pattern PATTERN = Pattern.compile("[a-zA-Z0-9_][a-zA-Z0-9_\\-.]*[a-zA-Z0-9_]");
+
     private final String name;
 
     private AthenzDomain(String name) {
+        validateName(name);
         this.name = name;
     }
 
+    private static void validateName(String name) {
+        if (!PATTERN.matcher(name).matches()) {
+            throw new IllegalArgumentException("Not a valid domain name: '" + name + "'");
+        }
+    }
+
     public static AthenzDomain from(String value) {
         return new AthenzDomain(value);
     }