Associate Ldap user to a group with Java

Question

I'm having problems to find how to associate a #Ldap user to a given group.

That is what I have tried:

    Attributes attrs = new BasicAttributes();

    BasicAttribute basicAttrs = new BasicAttribute("objectclass");
    basicAttrs.add("top");
    basicAttrs.add("person");

    BasicAttribute memberOf = new BasicAttribute("memberOf");
    memberOf.add("Managers"); // Tried with distinguished name too
    memberOf.add("Administrators"); // Tried with distinguished name too

    attrs.put(basicAttrs);
    attrs.put("cn", user.getLogin());
    attrs.put("name", user.getLogin());
    attrs.put("login", user.getLogin());
    attrs.put("mail", user.getMail());
    attrs.put("displayName", user.getDisplayName());
    attrs.put("memberOf", memberOf);

    try {
        ctx.bind("CN=" + user.getLogin() + "," + baseDn, null, attrs);
    } catch (NamingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

I also tried to use the distinguished names like: "CN=Managers,OU=<system_name>,OU=Users,OU=<server>,DC=com", but didn't work. I think it should be somewhere to reference the Ldap group.

But I got this error:

javax.naming.directory.InvalidAttributeValueException: Malformed 'memberOf' attribute value; remaining name 'CN=lcarvalho,OU=<system_name>,OU=Users,OU=<server>,DC=com'
at com.sun.jndi.ldap.LdapClient.encodeAttribute(LdapClient.java:951)
at com.sun.jndi.ldap.LdapClient.add(LdapClient.java:999)
at com.sun.jndi.ldap.LdapCtx.c_bind(LdapCtx.java:396)
at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_bind(ComponentDirContext.java:277)
at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.bind(PartialCompositeDirContext.java:197)
at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.bind(PartialCompositeDirContext.java:186)
at javax.naming.directory.InitialDirContext.bind(InitialDirContext.java:158)
...

This is all the stack trace besides my application lines.

Answer 1

If you're using OpenLDAP the memberOf attribute is maintained automatically by the memberOf overlay, and your application shouldn't write it at all. What you should be doing is adding the DN of the user to the uniqueMember or roleOccupant etc. attribute of the group he is joining. Then its DN will magically appear in his memberOf attribute.