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import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.SecureRandom;
import sun.misc.*;
public class MainClass {
public static void main (String[] args) throws Exception {
SecureRandom random = new SecureRandom();
byte[] keyBytes = new byte[20];
random.nextBytes(keyBytes);
SecretKeySpec key = new SecretKeySpec(keyBytes, "HMACSHA1");
System.out.println("Key:"+new
BASE64Encoder().encode(key.getEncoded()));
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(key);
mac.update("test".getBytes("UTF8"));
byte[] result = mac.doFinal();
System.out.println("MAC: "+new BASE64Encoder().encode(result));
}
}
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