/* package whatever; // don't place package name! */
 
import java.util.*;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
 
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
 
public class Main {
    public static void main(String[] args) throws Exception {
        String algo = "HMacSHA1";
        String keySource = "qwertyuiopasdfghjklz";
        String str = "hogehoge";
 
        final SecretKeySpec keySpec = new SecretKeySpec(keySource.getBytes(), algo);
        final Mac mac = Mac.getInstance(algo);
        mac.init(keySpec);
        final byte[] signBytes = mac.doFinal(str.getBytes());
        String encoded = Base64.getEncoder().encodeToString(signBytes);
        System.out.print(encoded);
    }	
}

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