Recently, I've had the need to setup user authentication with webcenter and noticed that weblogic had it's own built in LDAP server. I didn't find my information around on the OTN or google about it so I thought I'd share what I learnt. Below is how to setup LDAP on a WLS and authenticate against it in Java.
Setting up Embedded LDAP on the Intergrated WLS
You will need to set the credential and confirm credential to a new password and check the Anonymous Bind Allowed check box. In this example we will use “welcome1”.
All the below methods can be used to interface with the WLS Embedded LDAP.
If you need to explore the WLS embedded LDAP directory structure you can download JXpolrer and use the following details.
Localhost Details:
Host: 127.0.0.1:7101
Base DN: dn=DefaultDomain
User DN: cn=Admin
Password: welcome1
Variables
private String ldapServer = "ldap://127.0.0.1:7101";
private String ldapPassword = "welcome1";
private String ldapDC = "DefaultDomain";
Change Password
public String changePassword(String username, String oldPassword,
String newPassword, String confirmNewPassword) {
if (oldPassword.equals(newPassword)) {
System.out.println("new and old passwords match");
return "Your new password must be different from your old password.";
}
if (!newPassword.equals(confirmNewPassword)) {
System.out.println("new password and confirmed password don't match");
return "Your new password must match your confirmed password.";
}
if (!isAuthenticated(username, oldPassword)) {
System.out.println("old password was not authenticated");
return "Your old password is incorrect.";
}
String ldapUri = ldapServer;
String admindn = "cn=Admin";
String admincred = ldapPassword;
String usersContainer = "ou=people,ou=myrealm,dc=" + ldapDC;
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, ldapUri);
env.put(Context.SECURITY_PRINCIPAL, admindn);
env.put(Context.SECURITY_CREDENTIALS, admincred);
try {
InitialDirContext initialContext = new InitialDirContext(env);
DirContext ctx = initialContext;
ModificationItem[] mods = new ModificationItem[1];
Attribute mod0 = new BasicAttribute("userpassword", newPassword);
mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE, mod0);
ctx.modifyAttributes("uid=" + username + "," + usersContainer,
mods);
ctx.close();
return "Password Changed!";
} catch (NamingException e) {
System.out.println(e);
return "Woops! Something went wrong!";
}
}
Create User
public String createUser(String firstname, String lastname,
String username, String password,
String confirmPassword) {
if (!password.equals(confirmPassword)) {
return "Passwords do not match.";
}
String ldapUri = ldapServer;
String admindn = "cn=Admin";
String admincred = ldapPassword;
String usersContainer = "ou=people,ou=myrealm,dc=" + ldapDC;
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, ldapUri);
env.put(Context.SECURITY_PRINCIPAL, admindn);
env.put(Context.SECURITY_CREDENTIALS, admincred);
try {
DirContext ctx = new InitialDirContext(env);
Attributes attrs = new BasicAttributes(true);
Attribute objclass = new BasicAttribute("ObjectClass");
objclass.add("top");
objclass.add("inetorgperson");
objclass.add("wlsuser");
Attribute surname = new BasicAttribute("sn");
surname.add(lastname);
Attribute givenname = new BasicAttribute("givenname");
givenname.add(firstname);
Attribute cn = new BasicAttribute("cn");
cn.add(username);
Attribute mail = new BasicAttribute("mail");
mail.add(username);
Attribute name = new BasicAttribute("displayname");
name.add(firstname + " " + lastname);
Attribute pwd = new BasicAttribute("userpassword");
pwd.add(password);
attrs.put(objclass);
attrs.put(mail);
attrs.put(givenname);
attrs.put(name);
attrs.put(cn);
attrs.put(surname);
attrs.put(pwd);
ctx.createSubcontext("uid=" + username + "," + usersContainer,
attrs);
ctx.close();
return "success";
} catch (NameAlreadyBoundException e) {
System.out.println(e);
return "User already exists.";
} catch (NamingException e) {
System.out.println(e);
return "Woops! Something went wrong!";
}
}
Reset Password
public String resetPassword(String username) {
SecureRandom random = new SecureRandom();
String randomString = new BigInteger(130, random).toString(32);
String newPassword = randomString.substring(0, 8);
String ldapUri = ldapServer;
String admindn = "cn=Admin";
String admincred = ldapPassword;
String usersContainer = "ou=people,ou=myrealm,dc=" + ldapDC;
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, ldapUri);
env.put(Context.SECURITY_PRINCIPAL, admindn);
env.put(Context.SECURITY_CREDENTIALS, admincred);
try {
InitialDirContext initialContext = new InitialDirContext(env);
DirContext ctx = initialContext;
ModificationItem[] mods = new ModificationItem[1];
Attribute mod0 = new BasicAttribute("userpassword", newPassword);
mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE, mod0);
ctx.modifyAttributes("uid=" + username + "," + usersContainer,
mods);
ctx.close();
return newPassword;
} catch (NamingException e) {
System.out.println(e);
return "";
}
}
Check Authenticated
public boolean isAuthenticated(String username, String password) {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, ldapServer);
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "uid=" + username + ",ou=people,ou=myrealm,dc=" + ldapDC);
env.put(Context.SECURITY_CREDENTIALS, password);
try{
DirContext ctx = new InitialDirContext(env);
String authorised = ctx.AUTHORITATIVE;
ctx.close();
return true;
}catch(NamingException e){
System.out.println(e);
return false;
}
}
