Most applications nowadays authenticate through LDAP (directory service). To set this up, first register the SSL certificate using the keytool utility, as shown below:
Register ssl certificate using keytool:keytool -import -alias <certname> -file -keystore "..yourpathjavajrelibsecuritycacerts" The following code shows how to connect to LDAP and display the values specific to a username:
..class name.... public static void main(String args[]){String keystore = System.getProperty("" + "/lib/security/cacerts");System.setProperty(LDAPConstants.LDAP_SSL_TRUST_STORE,keystore);try{Hashtable env = new Hashtable();env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");env.put(Context.PROVIDER_URL, "ldap://yourservername:636");env.put(Context.SECURITY_AUTHENTICATION, "simple");env.put(Context.SECURITY_PROTOCOL, "ssl");env.put(Context.SECURITY_PRINCIPAL, "yourusername");env.put(Context.SECURITY_CREDENTIALS, "yourpassword"); dirCtx = new InitialLdapContext(env, null);NamingEnumeration ne = null;SearchControls controls = new SearchControls();controls.setSearchScope(SearchControls.SUBTREE_SCOPE);ne = dirCtx.search("OU=Users,DC=yourcompany, DC=com, DC=au","userName="+userName,controls); if (ne != null) { if (ne.hasMore()) { SearchResult item = (SearchResult) ne.next(); display(item.getAttributes()); }}catch(javax.naming.AuthenticationException e){ e.printStackTrace();}catch(NamingException e) { e.printStackTrace();}}private static void display(Attributes attr) throws NamingException{ NamingEnumeration ne = attr.getAll(); while(ne.hasMore()){ Attribute obj = (Attribute)ne.next(); System.out.println(obj.getID()+" "+(String)obj.get(0)); }}....... 
