java program sha512
// Java program to calculate SHA-512 hash value
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class GFG {
public static String encryptThisString(String input)
{
try {
// getInstance() method is called with algorithm SHA-512
MessageDigest md = MessageDigest.getInstance("SHA-512");
// digest() method is called
// to calculate message digest of the input string
// returned as array of byte
byte[] messageDigest = md.digest(input.getBytes());
// Convert byte array into signum representation
BigInteger no = new BigInteger(1, messageDigest);
// Convert message digest into hex value
String hashtext = no.toString(16);
// Add preceding 0s to make it 32 bit
while (hashtext.length() < 32) {
hashtext = "0" + hashtext;
}
// return the HashText
return hashtext;
}
// For specifying wrong message digest algorithms
catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
// Driver code
public static void main(String args[]) throws NoSuchAlgorithmException
{
System.out.println("HashCode Generated by SHA-512 for: ");
String s1 = "GeeksForGeeks";
System.out.println("\n" + s1 + " : " + encryptThisString(s1));
String s2 = "hello world";
System.out.println("\n" + s2 + " : " + encryptThisString(s2));
}
}