Source Code : Basic IO example using SHA1

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Basic IO example using SHA1

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.security.DigestInputStream;
import java.security.DigestOutputStream;
import java.security.MessageDigest;
import java.security.Security;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

/**
 * Basic IO example using SHA1
 */
public class MainClass {
  public static void main(String[] args) throws Exception {
    Security.addProvider(new BouncyCastleProvider());        
    byte[] input = "www.java2s.com".getBytes();
    System.out.println("input     : " + new String(input));    
    MessageDigest hash = MessageDigest.getInstance("SHA1");

    ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(input);
    DigestInputStream digestInputStream = new DigestInputStream(byteArrayInputStream, hash);
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

    int ch;
    while ((ch = digestInputStream.read()) >= 0) {
      byteArrayOutputStream.write(ch);
    }

    byte[] newInput = byteArrayOutputStream.toByteArray();
    System.out.println("in digest : " + new String(digestInputStream.getMessageDigest().digest()));

    byteArrayOutputStream = new ByteArrayOutputStream();
    DigestOutputStream digestOutputStream = new DigestOutputStream(byteArrayOutputStream, hash);
    digestOutputStream.write(newInput);
    digestOutputStream.close();

    System.out.println("out digest: " + new String(digestOutputStream.getMessageDigest().digest()));
  }
}

           
       

Thank with us