install cert propertiessuncertpathbuilderexception: unable to find valid certification path to requested target

https://github.com/escline/InstallCert/blob/master/InstallCert.java

/*
	* Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* - Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* - Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* - Neither the name of Sun Microsystems nor the names of its
	* contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
	* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	/**
	* Originally from:
	* http://blogs.sun.com/andreas/resource/InstallCert.java
	* Use:
	* java InstallCert hostname
	* Example:
	*% java InstallCert ecc.fedora.redhat.com
	*/
	import javax.net.ssl.*;
	import java.io.*;
	import java.security.KeyStore;
	import java.security.MessageDigest;
	import java.security.cert.CertificateException;
	import java.security.cert.X509Certificate;
	/**
	* Class used to add the server's certificate to the KeyStore
	* with your trusted certificates.
	*/
	public class InstallCert {
	public static void main(String[] args) throws Exception {
	String host;
	int port;
	char[] passphrase;
	if ((args.length == 1) || (args.length == 2)) {
	String[] c = args[0].split(":");
	host = c[0];
	port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
	String p = (args.length == 1) ? "changeit" : args[1];
	passphrase = p.toCharArray();
	} else {
	System.out.println("Usage: java InstallCert [:port] [passphrase]");
	return;
	}
	File file = new File("jssecacerts");
	if (file.isFile() == false) {
	char SEP = File.separatorChar;
	File dir = new File(System.getProperty("java.home") + SEP
	+ "lib" + SEP + "security");
	file = new File(dir, "jssecacerts");
	if (file.isFile() == false) {
	file = new File(dir, "cacerts");
	}
	}
	System.out.println("Loading KeyStore " + file + "...");
	InputStream in = new FileInputStream(file);
	KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
	ks.load(in, passphrase);
	in.close();
	SSLContext context = SSLContext.getInstance("TLS");
	TrustManagerFactory tmf =
	TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
	tmf.init(ks);
	X509TrustManager defaultTrustManager = (X509TrustManager) tmf.getTrustManagers()[0];
	SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
	context.init(null, new TrustManager[]{tm}, null);
	SSLSocketFactory factory = context.getSocketFactory();
	System.out.println("Opening connection to " + host + ":" + port + "...");
	SSLSocket socket = (SSLSocket) factory.createSocket(host, port);
	socket.setSoTimeout(10000);
	try {
	System.out.println("Starting SSL handshake...");
	socket.startHandshake();
	socket.close();
	System.out.println();
	System.out.println("No errors, certificate is already trusted");
	} catch (SSLException e) {
	System.out.println();
	e.printStackTrace(System.out);
	}
	X509Certificate[] chain = tm.chain;
	if (chain == null) {
	System.out.println("Could not obtain server certificate chain");
	return;
	}
	BufferedReader reader =
	new BufferedReader(new InputStreamReader(System.in));
	System.out.println();
	System.out.println("Server sent " + chain.length + " certificate(s):");
	System.out.println();
	MessageDigest sha1 = MessageDigest.getInstance("SHA1");
	MessageDigest md5 = MessageDigest.getInstance("MD5");
	for (int i = 0; i < chain.length; i++) {
	X509Certificate cert = chain[i];
	System.out.println
	(" " + (i + 1) + " Subject " + cert.getSubjectDN());
	System.out.println(" Issuer " + cert.getIssuerDN());
	sha1.update(cert.getEncoded());
	System.out.println(" sha1 " + toHexString(sha1.digest()));
	md5.update(cert.getEncoded());
	System.out.println(" md5 " + toHexString(md5.digest()));
	System.out.println();
	}
	System.out.println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
	String line = reader.readLine().trim();
	int k;
	try {
	k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
	} catch (NumberFormatException e) {
	System.out.println("KeyStore not changed");
	return;
	}
	X509Certificate cert = chain[k];
	String alias = host + "-" + (k + 1);
	ks.setCertificateEntry(alias, cert);
	OutputStream out = new FileOutputStream("jssecacerts");
	ks.store(out, passphrase);
	out.close();
	System.out.println();
	System.out.println(cert);
	System.out.println();
	System.out.println
	("Added certificate to keystore 'jssecacerts' using alias '"
	+ alias + "'");
	}
	private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
	private static String toHexString(byte[] bytes) {
	StringBuilder sb = new StringBuilder(bytes.length * 3);
	for (int b : bytes) {
	b &= 0xff;
	sb.append(HEXDIGITS[b >> 4]);
	sb.append(HEXDIGITS[b & 15]);
	sb.append(' ');
	}
	return sb.toString();
	}
	private static class SavingTrustManager implements X509TrustManager {
	private final X509TrustManager tm;
	private X509Certificate[] chain;
	SavingTrustManager(X509TrustManager tm) {
	this.tm = tm;
	}
	public X509Certificate[] getAcceptedIssuers() {
	/**
	* This change has been done due to the following resolution advised for Java 1.7+
	http://infposs.blogspot.kr/2013/06/installcert-and-java-7.html
	**/
	return new X509Certificate[0];
	//throw new UnsupportedOperationException();
	}
	public void checkClientTrusted(X509Certificate[] chain, String authType)
	throws CertificateException {
	throw new UnsupportedOperationException();
	}
	public void checkServerTrusted(X509Certificate[] chain, String authType)
	throws CertificateException {
	this.chain = chain;
	tm.checkServerTrusted(chain, authType);
	}
	}
	}