package sega.a7;

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

public class StorageWrite extends AuthCommand {
    private static final short RECV_PACKET_SIZE = 0;
    private static final byte AUTH_LEVEL = 2;
    private static final short PARAM_SIZE = 46;
    private static final short RECV_PACKET_EXCLUDING_DATA_SIZE = 50;
    private static final short DATA_SIZE_OFFSET = 6;
    private static final short WRITE_OFFSET_OFFSET = 8;
    private static final short WRITE_DATA_OFFSET = 10;

    public StorageWrite(short cmd, AppData data, MakePacket packet, MessageDigest sha1, HmacSha1 hmacSha1,
            Crypt crypt) {
        super(cmd, RECV_PACKET_SIZE, PARAM_SIZE, AUTH_LEVEL, data, packet, sha1, hmacSha1, crypt);
    }

    public short core(byte[] data, short dataOffset, short dataLength) {
        short ramD_paramsize = Util.getShort(data, (short) (dataOffset + 2));
        short ramD_encDataSize = (short) (ramD_paramsize - RECV_PACKET_EXCLUDING_DATA_SIZE);
        short ramD_wirteDataSize = Util.getShort(data, (short) (dataOffset + DATA_SIZE_OFFSET));
        short ramD_bufferOffset = Util.getShort(data, (short) (dataOffset + WRITE_OFFSET_OFFSET));
        byte[] ramD_newWriteData = this.m_ee_data.getGeneralBuffer_ramD();

        if ((ramD_encDataSize % 16) != 0 || ramD_newWriteData.length < ramD_encDataSize
                || ramD_wirteDataSize == 0
                || ramD_wirteDataSize + ramD_bufferOffset > AppConfig.STORAGE_SIZE)
            return AppConfig.A7_BAD_PARAMETER;

        short ramD_decSize = decData(data, (short) (dataOffset + WRITE_DATA_OFFSET), ramD_encDataSize,
                ramD_newWriteData, (short) 0);
        if (ramD_wirteDataSize > ramD_decSize)
            return AppConfig.A7_FAIL;

        if (!this.m_ee_data.setStorageData_ee(ramD_newWriteData, (short) 0, ramD_wirteDataSize, ramD_bufferOffset))
            return AppConfig.A7_EEP_WRITEFAIL;
        return AppConfig.A7_SUCCESS;
    }
}