pemtoder.java

来自「一个java开发的非常全面的关于证书发放」· Java 代码 · 共 163 行

/*
  Name:         PEMtoDER.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.x509;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.BodyTagSupport;

/**
 * JSP tag for converting PEM strings to DER strings
 *
 * @jsp.tag
 * name="pemtoder"
 * display-name="PEMtoDER"
 * body-content="JSP"
 * example="<%-- Convert the PEM string to DER format--%>

 * <jce:pemtoder

 *		pemstring=\"<%= pageContext.getAttribute(\"certificate\", PageContext.PAGE_SCOPE) %>\"

 *		derstring=\"derformattedstring\"/>"
 *
 * description="JSP tag for converting PEM strings to DER strings"
 *
 * @author Gert Van Ham
 * @author [e-mail]
 * @author http://jcetaglib.sourceforge.net
 * @version $Id: PEMtoDER.java,v 1.4 2004/04/15 07:28:36 hamgert Exp $
 */

public class PEMtoDER extends BodyTagSupport {
    private static final String PAGE = "page";
    private static final String REQUEST = "request";
    private static final String SESSION = "session";
    private static final String APPLICATION = "application";

    protected String pemstring;

    private int scope = PageContext.PAGE_SCOPE;
    private String derstring;

    public static String replace(String text, String repl, String with) {
        if (text == null) {
            return null;
        }

        StringBuffer buf = new StringBuffer(text.length());
        int start = 0, end = 0;
        while ((end = text.indexOf(repl, start)) != -1) {
            buf.append(text.substring(start, end)).append(with);
            start = end + repl.length();
        }
        buf.append(text.substring(start));
        return buf.toString();
    }

    public static int getScope(String scope) {
        int ret = PageContext.PAGE_SCOPE; // default

        if (REQUEST.equalsIgnoreCase(scope))
            ret = PageContext.REQUEST_SCOPE;
        else if (SESSION.equalsIgnoreCase(scope))
            ret = PageContext.SESSION_SCOPE;
        else if (APPLICATION.equalsIgnoreCase(scope))
            ret = PageContext.APPLICATION_SCOPE;
        else if (PAGE.equalsIgnoreCase(scope))
            ret = PageContext.PAGE_SCOPE;

        return ret;
    } //getScope()

    public int doEndTag() throws JspException {
        String input;
        String output;
        String beginKey = null;
        String endKey = null;

        // determine the value by...
        if (pemstring != null) {
            // ... reading our attribute
            input = pemstring;
        } else {
            // ... retrieving and trimming our body
            if (bodyContent == null || bodyContent.getString() == null) {
                input = "";
            } else {
                input = bodyContent.getString().trim();
            }
        }

        // Check for boundaries
        if (input.indexOf("-----BEGIN CERTIFICATE-----") != -1) {
            beginKey = "-----BEGIN CERTIFICATE-----";
            endKey = "-----END CERTIFICATE-----";
        } else if (input.indexOf("-----BEGIN CERTIFICATE REQUEST-----") != -1) {
            beginKey = "-----BEGIN CERTIFICATE REQUEST-----";
            endKey = "-----END CERTIFICATE REQUEST-----";
        } else if (input.indexOf("-----BEGIN PRIVATE KEY-----") != -1) {
            beginKey = "-----BEGIN PRIVATE KEY-----";
            endKey = "-----END PRIVATE KEY-----";
        }

        output = replace(input, "\n", "");
        output = replace(output, beginKey, "");
        output = replace(output, endKey, "");

        pageContext.setAttribute(derstring, output, scope);

        return EVAL_PAGE;
    } //doEndTag()

    /**
     * @jsp.attribute
     *     description="Scope of the return variables. Can be 'page', 'session', 'request' or 'application'. Default is 'page'"
     *     type="java.lang.String"
     *     required="false"
     *     rtexprvalue="false"
     */
    public void setScope(String scope) {
        this.scope = getScope(scope);
    }

    /**
     * @jsp.attribute
     *     description="Optional attribute, the PEM string. The body of the tag will be taken if omitted"
     *     type="java.lang.String"
     *     required="false"
     *     rtexprvalue="true"
     */
    public void setPemstring(String pemstring) {
        this.pemstring = pemstring;
    }

    /**
     * @jsp.attribute
     *     description="Return variable to store the DER string"
     *     type="java.lang.String"
     *     required="true"
     *     rtexprvalue="true"
     */
    public void setDerstring(String derstring) {
        this.derstring = derstring;
    }

    public String getDerstring() {
        return derstring;
    }
}