/* * Copyright (c) 2005, John Mettraux, OpenWFE.org * 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 the "OpenWFE" 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. * * $Id: RsaKey.java,v 1.7 2005/05/17 16:40:14 jmettraux Exp $ *///// RsaKey.java//// jmettraux@openwfe.org//// generated with // jtmpl 1.0.04 31.10.2002 John Mettraux (jmettraux@openwfe.org)//package openwfe.org.crypto;import java.math.BigInteger;import java.security.KeyPair;import java.security.KeyFactory;import java.security.KeyPairGenerator;import java.security.spec.RSAPublicKeySpec;import java.security.spec.RSAPrivateKeySpec;import java.security.interfaces.RSAKey;import java.security.interfaces.RSAPublicKey;import java.security.interfaces.RSAPrivateKey;/** * Something that is easily XML encodable... * * <p><font size=2>CVS Info : * <br>$Author: jmettraux $ * <br>$Date: 2005/05/17 16:40:14 $ * <br>$Id: RsaKey.java,v 1.7 2005/05/17 16:40:14 jmettraux Exp $ </font> * * @author jmettraux@openwfe.org */public class RsaKey    implements java.io.Serializable{    static final long serialVersionUID = -2578029002953409978L;    //    // CONSTANTS (definitions)    public final static String PUBLIC = "public";    public final static String PRIVATE = "private";    public final static String PUBLIC_KEY = "public-key";    public final static String PRIVATE_KEY = "private-key";    public final static String EXP = "exp";    public final static String MOD = "mod";    //    // FIELDS    protected String keyType = null;    protected String exp = null;    protected String mod = null;    //    // CONSTRUCTORS    public RsaKey ()    {        super();    }    public RsaKey (final String keyType, final String exp, final String mod)    {        super();        this.keyType = keyType;        this.exp = exp;        this.mod = mod;    }    public RsaKey (RSAKey key)        throws CryptoException    {        this.mod = key.getModulus().toString();        if (key instanceof RSAPublicKey)        {            this.keyType = PUBLIC;            this.exp = ((RSAPublicKey)key).getPublicExponent().toString();        }        else if (key instanceof RSAPrivateKey)        {            this.keyType = PRIVATE;            this.exp = ((RSAPrivateKey)key).getPrivateExponent().toString();        }        else        {            throw new CryptoException                ("Cannot create RsaKey from key of class '"+                 key.getClass().getName()+"'");        }    }    //    // BEAN METHODS    public String getKeyType () { return this.keyType; }    public String getMod () { return this.mod; }    public String getExp () { return this.exp; }    public void setKeyType (String keyType) { this.keyType = keyType; }    public void setMod (String s) { this.mod = s; }    public void setExp (String s) { this.exp = s; }    //    // METHODS    public RSAKey assembleRealKey ()        throws CryptoException    {        try        {            KeyFactory factory = KeyFactory.getInstance("RSA");            if (this.keyType.equals(PUBLIC))            {                RSAPublicKeySpec spec = new RSAPublicKeySpec                    (new BigInteger(this.mod), new BigInteger(this.exp));                return (RSAKey)factory.generatePublic(spec);            }            RSAPrivateKeySpec spec = new RSAPrivateKeySpec                (new BigInteger(this.mod), new BigInteger(this.exp));            return (RSAKey)factory.generatePrivate(spec);        }        catch (Exception e)        {            throw new CryptoException                ("Failed to assemble real RSAKey", e);        }    }    /**     * lightweight xml output     */    public String toString ()    {        StringBuffer sb = new StringBuffer();        if (this.keyType.equals(PUBLIC))            sb.append("<"+PUBLIC_KEY+">\n");        else            sb.append("<"+PRIVATE_KEY+">\n");        sb.append("    <"+EXP+">");        sb.append(this.exp);        sb.append("</"+EXP+">\n");        sb.append("    <"+MOD+">");        sb.append(this.mod);        sb.append("</"+MOD+">\n");        if (this.keyType.equals(PUBLIC))            sb.append("</"+PUBLIC_KEY+">\n");        else            sb.append("</"+PRIVATE_KEY+">\n");        return sb.toString();    }    public org.jdom.Element toXml ()    {        org.jdom.Element eKey = null;        if (this.keyType.equals(PUBLIC))            eKey = new org.jdom.Element(PUBLIC_KEY);        else            eKey = new org.jdom.Element(PRIVATE_KEY);        org.jdom.Element eExp = new org.jdom.Element(EXP);        eExp.addContent(this.exp);        eKey.addContent(eExp);        org.jdom.Element eMod = new org.jdom.Element(MOD);        eMod.addContent(this.mod);        eKey.addContent(eMod);        return eKey;    }    //    // STATIC METHODS    public static RsaKey buildKey (org.jdom.Element elt)    {        if (elt == null) return null;        String eName = elt.getName();        String keyType = PRIVATE;        if (eName.equals(PUBLIC_KEY)) keyType = PUBLIC;        String exp = elt.getChildTextTrim(EXP);        String mod = elt.getChildTextTrim(MOD);        return new RsaKey(keyType, exp, mod);    }    public static RsaKey[] generateKeyPair (int strength)        throws CryptoException    {        try        {            KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");            generator.initialize(strength);            KeyPair pair = generator.generateKeyPair();            RsaKey[] result = new RsaKey[]             {                 new RsaKey((RSAKey)pair.getPublic()),                 new RsaKey((RSAKey)pair.getPrivate())            };            return result;        }        catch (Exception e)        {            throw new CryptoException                ("Failed to generate key pair", e);        }    }    public static void main (String[] args)    {        try        {            System.out.println("Generating key pair...");                        RsaKey[] keyPair = generateKeyPair(2048);            /*            java.beans.XMLEncoder encoder =                 new java.beans.XMLEncoder(System.out);            encoder.writeObject(keyPair[0]);            encoder.writeObject(keyPair[1]);            encoder.flush();            */            System.out.println(keyPair[0].toString());            System.out.println(keyPair[1].toString());        }        catch (Exception e)        {            e.printStackTrace();        }    }}