package DNA.Cryptography;

import java.security.*;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class Digest {

static {

Security.addProvider(new BouncyCastleProvider());

}

public static byte[] hash160(byte[] value) {

return ripemd160(sha256(value));

}

public static byte[] hash256(byte[] value) {

return sha256(sha256(value));

}

public static byte[] ripemd160(byte[] value) {

try {

MessageDigest md = MessageDigest.getInstance("RipeMD160");

return md.digest(value);

} catch (NoSuchAlgorithmException ex) {

throw new RuntimeException(ex);

}

}

public static byte[] sha256(byte[] value) {

try {

MessageDigest md = MessageDigest.getInstance("SHA-256");

return md.digest(value);

} catch (NoSuchAlgorithmException ex) {

throw new RuntimeException(ex);

}

}

public static byte[] sha256(byte[] value, int offset, int length) {

if (offset != 0 || length != value.length) {

byte[] array = new byte[length];

System.arraycopy(value, offset, array, 0, length);

value = array;

}

return sha256(value);

}

}