Java Tutorial/Security/ASN

Encoding an IV with ASN.1

   <source lang="java">

import java.security.AlgorithmParameters; import java.security.Security; import javax.crypto.spec.IvParameterSpec; import org.bouncycastle.asn1.ASN1InputStream; import org.bouncycastle.asn1.util.ASN1Dump; public class MainClass {

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
   
   AlgorithmParameters params = AlgorithmParameters.getInstance("AES", "BC");
   IvParameterSpec ivSpec = new IvParameterSpec(new byte[16]);
   params.init(ivSpec);
   ASN1InputStream aIn = new ASN1InputStream(params.getEncoded("ASN.1"));
   System.out.println(ASN1Dump.dumpAsString(aIn.readObject()));
 }

}</source>