This script allow you to test a LDAP configuration from the Jenkins console (cloudbees#32)

* This script allow you to test a LDAP configuration from the Jenkins console

* Change names and IP to Documentation format

https://tools.ietf.org/html/rfc5737 

3. Documentation Address Blocks

https://tools.ietf.org/html/rfc6761 

6.5. Domain Name Reservation Considerations for Example Domains

Author: kuisathaverat

GroupsFromLDAP.groovy

@@ -0,0 +1,71 @@
+import java.util.Hashtable
+import javax.naming.Context
+import javax.naming.NamingEnumeration
+import javax.naming.NamingException
+import javax.naming.directory.*
+import javax.naming.ldap.*
+import jenkins.model.Jenkins;
+import nectar.plugins.rbac.strategy.*;
+import hudson.security.*;
+import nectar.plugins.rbac.groups.*;
+import nectar.plugins.rbac.roles.*;
+
+
+try {
+        String ldapAdServer = "ldap://192.0.2.36:389"
+        String ldapSearchBase = "dc=example,dc=com"
+
+        String ldapUsername = "CN=tesla,CN=Users,DC=example,DC=com"
+        String ldapPassword = "Password12"
+
+  		String searchFilter = "(& (cn=*) (objectclass=group))"
+
+
+        Hashtable<String, Object> env = new Hashtable<String, Object>()
+        env.put(Context.SECURITY_AUTHENTICATION, "simple")
+        if(ldapUsername != null) {
+            env.put(Context.SECURITY_PRINCIPAL, ldapUsername)
+        }
+        if(ldapPassword != null) {
+            env.put(Context.SECURITY_CREDENTIALS, ldapPassword)
+        }
+        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory")
+        env.put(Context.PROVIDER_URL, ldapAdServer)
+
+  		DirContext ctx = new InitialDirContext(env);
+
+  		SearchControls searchControls = new SearchControls()
+        searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE)
+
+        NamingEnumeration<SearchResult> results = ctx.search(ldapSearchBase, searchFilter, searchControls)
+
+//RBAC integration
+        RoleMatrixAuthorizationStrategyImpl strategy = RoleMatrixAuthorizationStrategyImpl.getInstance()
+        RoleMatrixAuthorizationConfig config = RoleMatrixAuthorizationPlugin.getConfig()
+        GroupContainer container = GroupContainerLocator.locate(Jenkins.getInstance())
+
+        List<Group> groups = config.getGroups();
+        Set<String> groupNames = new HashSet<String>()
+        groups.each{ g -> groupNames.add(g.name) }
+
+        SearchResult searchResult = null
+        List<String> ldapGroups = new ArrayList<String>()
+  		results.each{ result ->
+        	String name = result.getAttributes().get('name')
+            if(!groupNames.contains(name)){
+                println 'Group to Add ' + name
+                Group group = new Group(container, name)
+                container.addGroup(group)
+            } else {
+                println 'Group exists ' + name
+                groupNames.remove(name)
+            }
+        }
+
+        println 'Groups not in LDAP '
+        groupNames.each{
+            println '\t' + it
+        }
+} catch (NamingException e) {
+    println("Problem getting attribute:" + e.getMessage())
+}