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.emv.cryptogram;
020
021import org.jpos.emv.IssuerApplicationData;
022import org.jpos.tlv.TLVList;
023
024import static org.jpos.emv.cryptogram.CryptogramDataBuilder.minimumSetOfDataElement;
025
026/**
027 * Visa CVN 18 - Data Builder
028 * @author Rainer Reyes
029 */
030public class CVN18DataBuilder implements CryptogramDataBuilder {
031    /** Default constructor; no instance state to initialise. */
032    public CVN18DataBuilder() {}
033
034    @Override
035    public String getDefaultARPCRequest(boolean approved) {
036        /* for success:
037         * 00830000
038         * Byte 6, bit 1: Issuer Approves Online Transaction
039         * Byte 6, bits 7–8: Update Counters:
040         * • 11 = Add transaction to offline counter
041         */
042        return approved ? "00830000" : "00000000";
043    }
044
045    @Override
046    public String buildARQCRequest(TLVList data, IssuerApplicationData iad) {
047        StringBuilder sb = new StringBuilder();
048        minimumSetOfDataElement(data).stream().forEach(sb::append);
049        sb.append(iad.toString());
050        return sb.toString();
051    }
052
053    @Override
054    public PaddingMethod getPaddingMethod() {
055        return PaddingMethod.ISO9797Method2;
056    }
057}