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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).
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package org.jgroups.auth;

import org.jgroups.Message;
import org.jgroups.annotations.Property;
import org.jgroups.util.Util;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.security.*;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * 
 * This is an example of using a preshared token that is encrypted using an X509 certificate for
 * authentication purposes. All members of the group have to have the same string value in the
 * JGroups config.
 * 
 * 
 * This example uses certificates contained within a specified keystore. Configuration parameters
 * for this example are shown below:
 * 
 * 
 * keystore_type = JKS(default)/PKCS12 - see
 * http://java.sun.com/j2se/1.4.2/docs/guide/security/CryptoSpec.html#AppA
 * keystore_path (required) = the location of the keystore
 * keystore_password (required) = the password of the keystore
 * cert_alias (required) = the alias of the certification within the keystore
 * cert_password = the password of the certification within the keystore
 * auth_value (required) = the string to encrypt
 * cipher_type =
 * RSA(default)/AES/Blowfish/DES/DESede/PBEWithMD5AndDES/PBEWithHmacSHA1AndDESede/RC2/RC4/RC5 - see
 * http://java.sun.com/j2se/1.4.2/docs/guide/security/jce/JCERefGuide.html#AppA
 * 
 * 
 * @author Chris Mills
 * @see org.jgroups.auth.AuthToken
 */
public class X509Token extends AuthToken {

    public static final String KEYSTORE_TYPE = "keystore_type";
    public static final String KEYSTORE_PATH = "keystore_path";
    public static final String KEYSTORE_PASSWORD = "keystore_password";
    public static final String CERT_ALIAS = "cert_alias";
    public static final String CERT_PASSWORD = "cert_password";
    public static final String TOKEN_ATTR = "auth_value";
    public static final String CIPHER_TYPE = "cipher_type";

    private boolean valueSet = false;

    @Property
    protected String keystore_type = "JKS";

    @Property
    protected String cert_alias = null;

    @Property
    protected String keystore_path = null;

    @Property(exposeAsManagedAttribute=false)
    protected String auth_value = null;

    @Property
    protected String cipher_type = "RSA";

    private byte[] encryptedToken = null;

    private char[] cert_password = null;
    private char[] keystore_password = null;

    private Cipher cipher = null;
    private PrivateKey certPrivateKey = null;
    private X509Certificate certificate = null;

    public X509Token() {
        // need an empty constructor
    }

    @Property(name = "cert_password",exposeAsManagedAttribute=false)
    public void setCertPassword(String pwd) {
        this.cert_password = pwd.toCharArray();
    }

    @Property(name = "keystore_password",exposeAsManagedAttribute=false)
    public void setKeyStorePassword(String pwd) {
        this.keystore_password = pwd.toCharArray();
        if (cert_password == null)
            cert_password = keystore_password;
    }

    /** To be used for testing only */
    public X509Token encryptedToken(byte[] buf) {
        encryptedToken=buf;
        return this;
    }

    public String getName() {
        return "org.jgroups.auth.X509Token";
    }

    public boolean authenticate(AuthToken token, Message msg) {
        if (!this.valueSet) {
            if (log.isErrorEnabled()) {
                log.error("X509Token not setup correctly - check token attrs");
            }
            return false;
        }

        if ((token != null) && (token instanceof X509Token)) {
            // got a valid X509 token object
            X509Token serverToken = (X509Token) token;
            if (!serverToken.valueSet) {
                if (log.isErrorEnabled()) {
                    log.error("X509Token - received token not valid");
                }
                return false;
            }

            try {
                if (log.isDebugEnabled()) {
                    log.debug("setting cipher to decrypt mode");
                }
                this.cipher.init(Cipher.DECRYPT_MODE, this.certPrivateKey);
                String serverBytes = new String(this.cipher.doFinal(serverToken.encryptedToken));
                if ((serverBytes.equalsIgnoreCase(this.auth_value))) {
                    if (log.isDebugEnabled()) {
                        log.debug("X509 authentication passed");
                    }
                    return true;
                }
            } catch (Exception e) {
                if (log.isErrorEnabled()) {
                    log.error(e.toString());
                }
            }
        }
        // if(log.isWarnEnabled()){
        // log.warn("X509 authentication failed");
        // }
        return false;
    }

    public void writeTo(DataOutput out) throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("X509Token writeTo()");
        }
        Util.writeByteBuffer(this.encryptedToken, out);
    }

    public void readFrom(DataInput in) throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("X509Token readFrom()");
        }
        this.encryptedToken = Util.readByteBuffer(in);
        this.valueSet = true;
    }

    public int size() {
        return Util.size(encryptedToken);
    }

    /**
     * Used during setup to get the certification from the keystore and encrypt the auth_value with
     * the private key
     * 
     * @return true if the certificate was found and the string encypted correctly otherwise returns
     *         false
     */
    public void setCertificate() throws KeyStoreException, IOException, NoSuchAlgorithmException,
                    CertificateException, NoSuchPaddingException, InvalidKeyException,
                    IllegalBlockSizeException, BadPaddingException, UnrecoverableEntryException {
        KeyStore store = KeyStore.getInstance(this.keystore_type);
        java.io.FileInputStream fis = new java.io.FileInputStream(this.keystore_path);
        store.load(fis, this.keystore_password);

        this.cipher = Cipher.getInstance(this.cipher_type);
        this.certificate = (X509Certificate) store.getCertificate(this.cert_alias);

        if (log.isDebugEnabled()) {
            log.debug("certificate = " + this.certificate.toString());
        }

        this.cipher.init(Cipher.ENCRYPT_MODE, this.certificate);
        this.encryptedToken = this.cipher.doFinal(this.auth_value.getBytes());

        if (log.isDebugEnabled()) {
            log.debug("encryptedToken = " + this.encryptedToken);
        }

        KeyStore.PrivateKeyEntry privateKey = (KeyStore.PrivateKeyEntry) store.getEntry(
                        this.cert_alias, new KeyStore.PasswordProtection(this.cert_password));
        this.certPrivateKey = privateKey.getPrivateKey();

        this.valueSet=true;

        if (log.isDebugEnabled()) {
            log.debug("certPrivateKey = " + this.certPrivateKey.toString());
        }
    }
}