Using Java To Reset AD Password

import javax.naming.*;
import javax.naming.directory.*;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import java.util.*;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

public class ADPasswordReset {
    //DirContext ldapContext;

    public static String updatePassword(String serverIP, String Principal,String PrincipalPassword,  String username) {
        try {
            trustSelfSignedSSL();
            Hashtable ldapEnv = new Hashtable(11);
            ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
            ldapEnv.put(Context.PROVIDER_URL, "ldap://" + serverIP + ":636");
            ldapEnv.put(Context.SECURITY_AUTHENTICATION, "simple");
            ldapEnv.put(Context.SECURITY_PRINCIPAL, Principal);
            ldapEnv.put(Context.SECURITY_CREDENTIALS, PrincipalPassword);
            ldapEnv.put(Context.SECURITY_PROTOCOL, "ssl");
            DirContext ldapContext = new InitialDirContext(ldapEnv);

            int codeCount = 8;
            String allChar = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";
            String[] allCharArray = allChar.split(",");
            String randomCode = "";
             int temp = -1;

            java.util.Random rand = new java.util.Random();
            int ii = 0;
             for (ii=0; ii < codeCount; ii++) {
                if (temp != -1)
                        {
                            rand = new java.util.Random(ii * temp * ((int)System.currentTimeMillis()));
                        }
                        int t = rand.nextInt(36);
                        temp = t;
                        randomCode += allCharArray[t];
                }

            char quotes ='"';
            String quotedPassword = quotes + randomCode + quotes;

            char[] unicodePwd=new  char[quotedPassword.length()];
            unicodePwd = quotedPassword.toCharArray();          

            byte[] pwdArray = new byte[unicodePwd.length * 2];
            int i = 0;
            for (i=0; i<unicodePwd.length; i++) {
                pwdArray[i*2 + 1] = (byte) (unicodePwd[i] >>> 8);
                pwdArray[i*2 + 0] = (byte) (unicodePwd[i] & 0xff);
            }
            javax.naming.directory.ModificationItem[] mods = new javax.naming.directory.ModificationItem[1];
            mods[0] = new javax.naming.directory.ModificationItem(javax.naming.directory.DirContext.REPLACE_ATTRIBUTE,
            new javax.naming.directory.BasicAttribute("UnicodePwd", pwdArray));
            ldapContext.modifyAttributes(username , mods);
            return randomCode;
        }
        catch (Exception e) {
            return e.toString();
        }
    }

      public static String pullUserDn(String serverIP, String Principal,String PrincipalPassword,  String domain,String query){
          try{
              trustSelfSignedSSL();
              Hashtable ldapEnv = new Hashtable(11);
              ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
              ldapEnv.put(Context.PROVIDER_URL, "ldap://" + serverIP + ":636");
              ldapEnv.put(Context.SECURITY_AUTHENTICATION, "simple");
              ldapEnv.put(Context.SECURITY_PRINCIPAL, Principal);
              ldapEnv.put(Context.SECURITY_CREDENTIALS, PrincipalPassword);
              ldapEnv.put(Context.SECURITY_PROTOCOL, "ssl");
              DirContext ldapContext = new InitialDirContext(ldapEnv);

              SearchControls ctrl = new SearchControls();
              ctrl.setSearchScope(SearchControls.SUBTREE_SCOPE);


              NamingEnumeration enumeration = ldapContext.search(domain, query, ctrl);
              SearchResult result = (SearchResult) enumeration.next();

              Attributes attribs = result.getAttributes();
              return (String) attribs.get("distinguishedname").get(0);

          }catch(Exception ex) {
              return ex.toString();
          }
      }
      public static String pullUserSamAName(String serverIP, String Principal,String PrincipalPassword,  String domain, String query){
          try{
              trustSelfSignedSSL();
              Hashtable ldapEnv = new Hashtable(11);
              ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
              ldapEnv.put(Context.PROVIDER_URL, "ldap://" + serverIP + ":636");
              ldapEnv.put(Context.SECURITY_AUTHENTICATION, "simple");
              ldapEnv.put(Context.SECURITY_PRINCIPAL, Principal);
              ldapEnv.put(Context.SECURITY_CREDENTIALS, PrincipalPassword);
              ldapEnv.put(Context.SECURITY_PROTOCOL, "ssl");
              DirContext ldapContext = new InitialDirContext(ldapEnv);

              SearchControls ctrl = new SearchControls();
              ctrl.setSearchScope(SearchControls.SUBTREE_SCOPE);


              NamingEnumeration enumeration = ldapContext.search(domain, query, ctrl);
              SearchResult result = (SearchResult) enumeration.next();

              Attributes attribs = result.getAttributes();
              System.out.println(attribs);
              return (String) attribs.get("samaccountname").get(0);

          }catch(Exception ex) {
              return ex.toString();
          }
      }
      public static void trustSelfSignedSSL() {
          try {
              SSLContext ctx = SSLContext.getInstance("TLS");
              X509TrustManager tm = new X509TrustManager() {

                  public void checkClientTrusted(X509Certificate[] xcs, String string) throws CertificateException {
                  }

                  public void checkServerTrusted(X509Certificate[] xcs, String string) throws CertificateException {
                  }

                  public X509Certificate[] getAcceptedIssuers() {
                      return null;
                  }
              };
              ctx.init(null, new TrustManager[]{tm}, null);
              SSLContext.setDefault(ctx);
          } catch (Exception ex) {
              ex.printStackTrace();
          }
      }
      public static void main (String[] args){
          String Pn = "dn of service account";
          String Ss = "dn of your domain";
          String Pp = "service account password";
          String Sip = "server ip";
          String s = "LDAP attribute to search by";
          String DnofUser = pullUserDn(Sip, Pn, Pp, Ss, s);
          System.out.println("Got: "+DnofUser);
          String samUser = pullUserSamAName(Sip, Pn, Pp, Ss, s);
          System.out.println("Got: "+samUser);
          System.out.println(updatePassword(Sip, Pn, Pp, DnofUser));

      }
}