[jboss-user] [Beginners Corner] - Re: javax.crypto.Mac

[rstaveley]

Here's a full dump:

Linkage error in javax.crypto.Mac
java.lang.NoClassDefFoundError
at javax.crypto.Mac.getInstance(DashoA12275)
at org.apache.jsp.test_jsp._jspService(test_jsp.java:66)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:595)

Using...


<%!
	public static String getStackTrace(Throwable e) {
		final java.io.Writer result = new java.io.StringWriter();
		final java.io.PrintWriter writer = new java.io.PrintWriter(result);
		e.printStackTrace(writer);
		return result.toString();
	}
%>
<%

try {
	javax.crypto.Mac mac = javax.crypto.Mac.getInstance("HmacSHA1");
	if (mac == null) {
		out.print("No Mac found for HmacSHA1");
	}
	else {
		java.security.Provider provider = mac.getProvider();
		out.print("Mac instance: "+mac.getClass().getName()+"\r\n");
		out.print("Provider: "+provider.getClass().getName()+" - "+provider.getInfo()+"\r\n");
		out.print("Algorithm: "+mac.getAlgorithm()+"\r\n");
	}
}
catch (Exception e) {
        out.print("Exception thrown, while inspecting crypto for HmacSHA1\n"+e.getMessage()+"\r\n");
}
catch (LinkageError le) {
        out.print("Linkage error in javax.crypto.Mac\r\n"+getStackTrace(le).replace("\n","")+"\r\n");
}

%>


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