PdfStamper in Java Applet -


i use pdfstamper in java applet sign pdf files. problem applet every time suspends when reach line pdfstamper.close(); think problem related java applet policy have granted permissions like:

grant {   permission java.security.allpermission; };

my code is:

import com.lowagie.text.documentexception; import com.lowagie.text.rectangle; import com.lowagie.text.pdf.pdfreader; import com.lowagie.text.pdf.pdfsignatureappearance; import com.lowagie.text.pdf.pdfstamper; import java.io.bufferedreader; import java.io.bytearrayoutputstream; import java.io.file; import java.io.fileinputstream; import java.io.filenotfoundexception; import java.io.fileoutputstream; import java.io.ioexception; import java.io.inputstream; import java.io.inputstreamreader; import java.io.outputstream; import java.security.accesscontroller; import java.security.keystore; import java.security.keystoreexception; import java.security.nosuchalgorithmexception; import java.security.privatekey; import java.security.privilegedaction; import java.security.unrecoverablekeyexception; import java.security.cert.certificate; import java.security.cert.certificateexception; import java.util.enumeration; import javax.swing.japplet;  public class signapplet extends japplet {      public void test() {         accesscontroller.doprivileged( new privilegedaction() {             @override             public object run() {                 try {                     keystore keystore = keystore.getinstance( "pkcs11-custom_name" );                      string pin = "custom_pin";                     keystore.load( null, pin.tochararray() );                     enumeration<string> aliases = keystore.aliases();                      string alias = aliases.nextelement();                     privatekey key = ( privatekey ) keystore.getkey( alias, pin.tochararray() );                     certificate[] chain = keystore.getcertificatechain( alias );                      string unsigned_pdf = "c:\\users\\user_name\\unsigned.pdf";                     string signed_pdf = "c:\\users\\user_name\\signed.pdf";                      pdfreader pdfreader = new pdfreader( (new file( unsigned_pdf )).getabsolutepath() );                     file outputfile = new file( signed_pdf );                     pdfstamper pdfstamper;                     pdfstamper = pdfstamper.createsignature( pdfreader, null, '\0', outputfile );                     pdfsignatureappearance sap = pdfstamper.getsignatureappearance();                     sap.setcrypto( key, chain, null, pdfsignatureappearance.self_signed );                     sap.setreason( "reason" );                     sap.setlocation( "" );                     sap.setvisiblesignature( new rectangle( 10, 10, 50, 30 ), 1, null );                      pdfstamper.setformflattening( true );                     pdfstamper.close(); // -- applet suspends right there                  } catch ( exception ex ) {                     ex.printstacktrace();                 }                 return null;             }         } );     } }

i run html that:

<applet code="signapplet.class" name="signapplet" archive="signapplet-1.0.jar, itext-2.1.7.jar" width="0" height="0"></applet>  <h:form>     <h:button onclick="document.signapplet.test();" value="--- test ---" /> </h:form>

keystore comes usb token.

in java debug console don't see exception. when run same source code main method (with little modification passing arguments) works well.

any idea problem?

solution: pdfstamper.close(); // -- applet suspends right there

itext pdfstamper calling api of jar bcprov*.jar. jar file signed e-certificate. need unzip jar , remove .dsa , .sf files in meta-inf. re-jar again , use e-certificate resign jar file. solve problem.


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