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-in Jamal macro library support tools

There is a newer version: 2.8.1

package javax0.jamal.tools;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SHA256 {
    private static final String ALGORITHM = "SHA-256";

    public static byte[] digest(String s) {
        final MessageDigest md;
        try {
            md = MessageDigest.getInstance(ALGORITHM);
        } catch (NoSuchAlgorithmException nsae) {
            // must not happen, because we use SHA-256 and the Java standard requres that
            //
            //Every implementation of the Java platform is required to support the following standard MessageDigest algorithms:
            //
            //MD5
            //SHA-1
            //SHA-256
            throw new RuntimeException("There is no algorithm '" + ALGORITHM + "' to create the digest for snippet consistency check.", nsae);
        }
        return md.digest(s.getBytes(StandardCharsets.UTF_8));
    }
}