package sega.a7;

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

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

    public EepInit(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) {
        if (this.m_ee_data.getSflag_ee())
            return AppConfig.A7_EEPWRITE_DISABLE;

        this.m_ee_data.reset();
        byte[] modulus = this.m_ee_data.getRsaDefaultPriModulus_ee();
        byte[] exponent = this.m_ee_data.getRsaDefaultPriExponent_ee();
        byte[] tmp = this.m_ee_data.getCryptBuffer_ramD();
        Util.arrayFillNonAtomic(tmp, (short) 0, (short) tmp.length, (byte) -1);

        if (!this.m_ee_data.setRsaPriKeyExponent_ee(exponent, (short) 0, AppConfig.RSA_PRI_EXPONENT_SIZE))
            return AppConfig.A7_EEP_WRITEFAIL;

        if (!this.m_ee_data.setRsaPriKeyModulus_ee(modulus, (short) 0, AppConfig.RSA_PRI_MODULUS_SIZE))
            return AppConfig.A7_EEP_WRITEFAIL;

        changeRsaKey_ee(modulus, (short) 0, AppConfig.RSA_PRI_MODULUS_SIZE, exponent, (short) 0, AppConfig.RSA_PRI_EXPONENT_SIZE);
        changeGKey_ee(tmp, (short) 0, (short) tmp.length, tmp, (short) 0, (short) tmp.length);
        return AppConfig.A7_SUCCESS;
    }
}