|
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.java2java.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()));
}
}
|
BasicIOexampleusingSHA1.zip( 1,198 k)