001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.security;
020
021/**
022 * Key Encription Scheme.
023 *
024 * @author Robert Demski
025 */
026public enum KeyScheme {
027
028    /**
029     * Encryption of a single length DES key using X9.17 methods.
030     * <p>
031     * Used for encryption of keys under a variant LMK..
032     */
033    Z,
034
035    /**
036     * Encryption of a double length key using X9.17 methods.
037     */
038    X,
039
040    /**
041     * Encryption of a double length DES key using the variant method.
042     * <p>
043     * Used for encryption of keys under a variant LMK.
044     */
045    U,
046
047    /**
048     * Encryption of a triple length key using X9.17 methods.
049     */
050    Y,
051
052    /**
053     * Encryption of a triple length DES key using the variant method.
054     * <p>
055     * Used for encryption of keys under a variant LMK.
056     */
057    T,
058
059    /**
060     * Encryption of single/double/triple-length DES & AES keys using the ANSI
061     * X9 TR-31 Key Block methods.
062     * <p>
063     * Only used for exporting keys <i>(e.g. under a KEK)</i>.
064     * <p>
065     * The ANSI X9 Committee published Technical Report 31 (TR-31) on
066     * <i>Interoperable Secure Key ExcKey Block Specification for Symmetric
067     * Algorithms</i> in 2010 to describe a method for secure key exchange which
068     * meets the needs of X9.24.
069     */
070    R,
071
072    /**
073     * Encryption of all DES, AES, HMAC & RSA keys using proprietary Key Block
074     * methods.
075     * <p>
076     * Used for encrypting keys for local use <i>(under a Key Block LMK)</i> or
077     * for importing/exporting keys <i>(e.g. under a KEK or ZMK)</i>.
078     */
079    S
080
081}
082