package sega.a7;

import javacard.security.MessageDigest;

public class KeyChange extends AuthCommand {
    private static final short RECV_PACKET_SIZE = 78;
    private static final byte AUTH_LEVEL = 2;
    private static final short PARAM_SIZE = 46;

    public KeyChange(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_dataSize = (short) 32;
        byte[] ramD_newKey = this.m_ee_data.getGeneralBuffer_ramD();
        if (ramD_newKey.length < ramD_dataSize)
            return AppConfig.A7_FAIL;

        short ramD_decSize = decData(data, (short) (dataOffset + 6), ramD_dataSize, ramD_newKey, (short) 0);
        if (32 > (short) ramD_decSize)
            return AppConfig.A7_FAIL;

        boolean bRet = changeConnectionKey_ee(ramD_newKey, (short) 0, (short) 16, ramD_newKey, (short) 16, (short) 16);
        return (short) (bRet ? 0 : 11);
    }
}