package sega.a7;

import javacard.framework.Util;
import javacard.security.MessageDigest;
import javacard.security.RandomData;

public class PlayCountRead extends AuthCommand {
    private static final short RECV_PACKET_SIZE = 46;
    private static final byte AUTH_LEVEL = 2;
    private static final short PARAM_SIZE = 62;
    private static final short PLAY_COUNT_VALUE_SIZE = 4;
    private static final short RANDOM_VALUE_SIZE = 12;
    private static final short ENC_DATA_SIZE = 16;
    private RandomData m_ee_rand;

    public PlayCountRead(short cmd, AppData data, MakePacket packet, MessageDigest sha1,
            HmacSha1 hmacSha1, Crypt crypt, RandomData rand) {
        super(cmd, RECV_PACKET_SIZE, PARAM_SIZE, AUTH_LEVEL, data, packet, sha1, hmacSha1, crypt);
        this.m_ee_rand = rand;
    }

    public short core(byte[] data, short dataOffset, short dataLength) {
        byte[] ramD_playCount = this.m_ee_data.getGeneralBuffer_ramD();
        if (ramD_playCount.length < PLAY_COUNT_VALUE_SIZE + RANDOM_VALUE_SIZE + ENC_DATA_SIZE)
            return AppConfig.A7_FAIL;
        this.m_ee_rand.generateData(ramD_playCount, (short) 0, (short) (PLAY_COUNT_VALUE_SIZE + RANDOM_VALUE_SIZE));
        this.m_ee_data.getPlayCounter_ee(ramD_playCount, (short) 0, PLAY_COUNT_VALUE_SIZE);
        short ramD_encSize = encData(ramD_playCount, (short) 0, ENC_DATA_SIZE, ramD_playCount,
                (short) (PLAY_COUNT_VALUE_SIZE + RANDOM_VALUE_SIZE));
        if (ramD_encSize != ENC_DATA_SIZE)
            return AppConfig.A7_FAIL;

        this.m_ramD_outDataInfo[AppConfig.SEND_BUUFER_INFO_OFFSET] = 16;
        this.m_ramD_outDataInfo[AppConfig.SEND_BUUFER_INFO_SIZE] = ramD_encSize;
        Util.arrayCopyNonAtomic(ramD_playCount, this.m_ramD_outDataInfo[AppConfig.SEND_BUUFER_INFO_OFFSET],
                this.m_ramD_outData, this.m_ramD_outDataInfo[AppConfig.SEND_BUUFER_INFO_OFFSET],
                this.m_ramD_outDataInfo[AppConfig.SEND_BUUFER_INFO_SIZE]);
        return AppConfig.A7_SUCCESS;
    }
}