Java tutorial
//package com.java2s; /* * Copyright 2006-2015 WebPKI.org (http://webpki.org). * * 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.io.IOException; import java.security.cert.X509Certificate; public class Main { public static boolean isTrustAnchor(X509Certificate certificate) throws IOException { boolean trust_anchor = certificate.getSubjectX500Principal().equals(certificate.getIssuerX500Principal()) && certificate.getBasicConstraints() >= 0; if (trust_anchor) { try { certificate.verify(certificate.getPublicKey()); } catch (Exception e) { throw new IOException(e); } return true; } return false; } }