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Use this library to handle SAP HANA DB connection options

There is a newer version: 2.13.0

package com.sap.xs.hdb.utils;

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

public final class DigestUtils {

	private static final char[] DIGITS_UPPER = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

	private DigestUtils() {}

	/**
	 * @param string
	 *            string to encode
	 * @return the encoded string
	 * @throws NoSuchAlgorithmException
	 *             NoSuchAlgorithmException
	 */
	public static char[] getSha256Hex(String string) throws NoSuchAlgorithmException {
		MessageDigest digest = MessageDigest.getInstance("SHA-256");
		byte[] hash = digest.digest(string.getBytes(StandardCharsets.UTF_8));
		return encodeHex(hash);
	}

	/**
	 * @param string
	 *            to encode
	 * @return the encoded string
	 * @throws NoSuchAlgorithmException
	 *             NoSuchAlgorithmException
	 */
	public static String getSha256HexString(String string) throws NoSuchAlgorithmException {
		return new String(getSha256Hex(string));
	}

	private static char[] encodeHex(final byte[] data) {
		final int l = data.length;
		final char[] out = new char[l << 1];
		// two characters form the hex value.
		int j = 0;
		for (int i = 0; i < l; i++) {
			out[j++] = DIGITS_UPPER[(0xF0 & data[i]) >>> 4];
			out[j++] = DIGITS_UPPER[0x0F & data[i]];
		}
		return out;
	}
}