getversion.java

一个java开发的非常全面的关于证书发放

/*
  Name:         GetVersion.java
  Licensing:    LGPL

  API:          Sun (http://java.sun.com) JCE 1.2.2 API (cleanroom implementation by Bouncy Castle)
  Provider:     Bouncy Castle (http://www.bouncycastle.org)

  Disclaimer:

  COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY OF ANY KIND,
  EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES THAT THE COVERED CODE
  IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE OR NON-INFRINGING. THE ENTIRE
  RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED CODE IS WITH YOU. SHOULD ANY COVERED CODE
  PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR)
  ASSUME THE COST OF ANY NECESSARY SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY
  CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED
  HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
*/

package net.sourceforge.jcetaglib.taglib;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import java.io.IOException;
import java.security.Provider;

/**
 * JSP tag to print out BouncyCastle JCE provider and JCETaglib version number
 *
 * @jsp.tag
 * name="getversion"
 * display-name="GetVersion"
 * body-content="empty"
 * example="
 * 	<%-- Generate a symmetric key file with default algorithm parameters

 * 		(AES, 256 bit key, CBC/PKCS7Padding) --%>

 * 	<jce:generatekey

 * 		keyfile=\"c:/jspkey.key\"

 * 		passphrase=\"<%= new StringBuffer(\"password\") %>\"/>"
 *
 *  description="JSP tag to print out BouncyCastle JCE provider and JCETaglib version number"
 *
 * @author Gert Van Ham
 * @author [e-mail]
 * @author http://jcetaglib.sourceforge.net
 * @version $Id: GetVersion.java,v 1.6 2004/04/15 07:28:35 hamgert Exp $
 */
public class GetVersion extends TagSupport {
    public int doStartTag() throws JspException {
        Provider prov = new BouncyCastleProvider();

        try {
            JspWriter w = pageContext.getOut();
            w.println("JCETaglib version: 1.0 Final<BR>");
            w.println("JCE provider: " + prov.getName() + "<BR>");
            w.println("JCE provider version: " + prov.getVersion() + "<BR>");
            w.println("JCE provider info: " + prov.getInfo());
        } catch (IOException ex) {
            throw new JspException(ex.getMessage(), ex);
        }

        return SKIP_BODY;
    } //doStartTag()
}