package sega.a7;

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

public class StorageSizeGet 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 STORAGE_SIZE_VALUE_SIZE = 2;
    private static final short RANDOM_VALUE_SIZE = 14;
    private static final short ENC_DATA_SIZE = 16;
    private RandomData m_ee_rand;

    public StorageSizeGet(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_storageSize = this.m_ee_data.getGeneralBuffer_ramD();
        if (ramD_storageSize.length < (short) (STORAGE_SIZE_VALUE_SIZE + RANDOM_VALUE_SIZE + ENC_DATA_SIZE))
            return AppConfig.A7_FAIL;

        this.m_ee_rand.generateData(ramD_storageSize, (short) 0, (short) (STORAGE_SIZE_VALUE_SIZE + RANDOM_VALUE_SIZE));
        Util.setShort(ramD_storageSize, (short) 0, AppConfig.STORAGE_SIZE);
        short ramD_encSize = encData(ramD_storageSize, (short) 0, ENC_DATA_SIZE, ramD_storageSize,
                (short) (STORAGE_SIZE_VALUE_SIZE + RANDOM_VALUE_SIZE));
        if (ramD_encSize != ENC_DATA_SIZE)
            return AppConfig.A7_FAIL;

        this.m_ramD_outDataInfo[0] = (short) (STORAGE_SIZE_VALUE_SIZE + RANDOM_VALUE_SIZE);
        this.m_ramD_outDataInfo[1] = ramD_encSize;
        Util.arrayCopyNonAtomic(ramD_storageSize, this.m_ramD_outDataInfo[0], this.m_ramD_outData,
                this.m_ramD_outDataInfo[0], this.m_ramD_outDataInfo[1]);
        return AppConfig.A7_SUCCESS;
    }
}