SSL Certificate in Java

1. Use open_ssl to test SSL connection

openssl s_client -connect IP:443

2. Import ca into java keystore

keytool -import -alias TWCAroot -keystore /usr/java/jdk1.6.0_35/jre/lib/security/cacerts -trustcacerts -file root.cer

3. List ca in keystore

keytool -list -v -keystore cacerts
keytool -list -v -keystore cacerts  -alias twcaroot

4. Delete ca in keystore

keytool -delete -alias aliasname  -keystore /usr/java/jdk1.6.0_35/jre/lib/security/cacerts

5. Test CA

A. save the SSLPoke.java  file

import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import java.io.*;

/** Establish a SSL connection to a host and port, writes a byte and
 * prints the response. See
 * http://confluence.atlassian.com/display/JIRA/Connecting+to+SSL+services
 */
public class SSLPoke {
    public static void main(String[] args) {
                if (args.length != 2) {
                        System.out.println("Usage: "+SSLPoke.class.getName()+" ");
                        System.exit(1);
                }
                try {
                        SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
                        SSLSocket sslsocket = (SSLSocket) sslsocketfactory.createSocket(args[0], Integer.parseInt(args[1]));

                        InputStream in = sslsocket.getInputStream();
                        OutputStream out = sslsocket.getOutputStream();

                        // Write a test byte to get a reaction :)
                        out.write(1);

                        while (in.available() > 0) {
                                System.out.print(in.read());
                        }
                        System.out.println("Successfully connected");

                } catch (Exception exception) {
                        exception.printStackTrace();
                }
        }
}

B. javac SSLPoke.java

C. java SSLPoke  192.168.1.1 443
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1764)
        at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:241)
        at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:235)
        at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1206)
        at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:136)
        at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)
        at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:529)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:958)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1203)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:654)
        at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:100)
        at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:114)
        at SSLPoke.main(SSLPoke.java:23)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:323)
        at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:217)
        at sun.security.validator.Validator.validate(Validator.java:218)
        at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
        at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)
        at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
        at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1185)
        ... 9 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:174)
        at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:238)
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:318)
        ... 15 more

D. openssl s_client -connect 192.168.1.1:443

save BEGIN END into test.cer (include BEGIN and END lines)

E. import the cert
keytool -import -alias TWCAroot -keystore /usr/java/jdk1.6.0_35/jre/lib/security/cacerts -trustcacerts -file test.cer

F. java SSLPoke  192.168.1.1 443
Successfully connected