Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 *  Copyright 2015 IBM Corp.
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

import java.security.cert.X509Certificate;

import java.util.regex.Pattern;

public class Main {
    public static String getClientIdFromCertificate(X509Certificate certificate) {

        if (certificate == null) {
            throw new IllegalArgumentException("Certificate cannot be null");
        }

        //subjectDN is of the form: "UID=<clientId>, DC=<some other value>" or "DC=<some other value>, UID=<clientId>"
        String clientId = null;

        String subjectDN = certificate.getSubjectDN().getName();
        String[] parts = subjectDN.split(Pattern.quote(","));
        for (String part : parts) {
            if (part.contains("UID=")) {
                String uid = part.substring(part.indexOf("UID="));
                clientId = uid.split(Pattern.quote("="))[1];
            }
        }

        return clientId;
    }
}