Hi,
I am working on client authentication(in a sample JSP application) using certificates.
I have written a code to extract the client information from the client certificate. Now I wanted to use certificate's serial number to identify the particular use from the database.
I extract the serial number using
<%= cert.getSerialNumber %>. It gives me an output 3. Is this a integer, BigInteger or array value?
Is there any way I can declare this as an another integer variable for example int a = (serial number value)?? I have not played much with jsp so I do not know exactly where to have a code for that in my jsp file.
I would really appreciate if someone could help me. Thanks in advance. I am attaching my code which extracts the serial number from the certificate installed.
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.math.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Bell Book and CD Store</title>
</head>
<body>
<%@page import="java.security.cert.X509Certificate"%>
<center> <font color="red"> Welcome</font> </center>
<%
Object o = request.getAttribute("javax.servlet.request.X509Certificate");
if (o != null) {
X509Certificate certs[] = (X509Certificate[]) o;
X509Certificate cert = certs[0];
%>
<%= cert.getSerialNumber() %>
<%
}
else {
%>
You are not Authorized!
Your certificate cannot be found!
<%
}
%>
<br><br>
<form method = "post" action = "page2.jsp">
<input type = submit value = "click me">
</form>
</body>
</html>