/*
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neon-auth - Authentication Extensions to Neon
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Copyright (C) 2024 Ulrich Hilger
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package de.uhilger.neon.auth;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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/**
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* Encoder zur Kennwort-Verschluesselung
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*
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* @author Ulrich Hilger
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* @version 1, 08.06.2021
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*/
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public class Encoder {
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private static final byte[] HEX_ARRAY = "0123456789ABCDEF".getBytes(StandardCharsets.US_ASCII);
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public byte[] encode(String password) throws NoSuchAlgorithmException {
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MessageDigest md = MessageDigest.getInstance("SHA-256");
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return md.digest(password.getBytes());
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}
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public String bytesToHex(byte[] bytes) {
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byte[] hexChars = new byte[bytes.length * 2];
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for (int j = 0; j < bytes.length; j++) {
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int v = bytes[j] & 0xFF;
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hexChars[j * 2] = HEX_ARRAY[v >>> 4];
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hexChars[j * 2 + 1] = HEX_ARRAY[v & 0x0F];
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}
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return new String(hexChars, StandardCharsets.UTF_8);
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}
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}
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