package com.schneiderelectric.plugin.fwupdate;

import java.math.BigInteger;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class AdminPasswordService {
    private static final String M2M_PASSWORD_HASH_ARAMIS = "PzLaM2ZqOx5Ks3NwIcJ1Sd6NeUvH7WfBrY9AbGgVtTnGhVyTmG8EjVu0TkFi4QClRoDpX";
    private static final int M2M_PASSWORD_LENGTH = 12;
    private static final int M2M_PASSWORD_MAX_SEED_LENGTH = 6;

    public static void main(String[] args)
    {
        String MAC = "<PUT_MAC_HERE>";
        String GateWayKey = "<PUT_GATEWAYKEY_HERE>";
        System.out.printf(newM2mAdminPassword(MAC, GateWayKey));
    }

    private static String hashSHA(String string2) {
        MessageDigest messageDigest;
        try {
            messageDigest = MessageDigest.getInstance((String)"SHA-256");
        }
        catch (NoSuchAlgorithmException noSuchAlgorithmException) {
            noSuchAlgorithmException.printStackTrace();
            messageDigest = null;
        }
        messageDigest.update(string2.getBytes(StandardCharsets.UTF_8));
        byte[] arrby = messageDigest.digest();
        Object[] arrobject = new Object[]{new BigInteger(1, arrby)};
        return String.format((String)"%064x", (Object[])arrobject);
    }

    public static String m2mAdminPassword(String string2) {
        return AdminPasswordService.passwordFromMacAddress(string2);
    }

    public static String newM2mAdminPassword(String string2, String string3) {
        String string4 = AdminPasswordService.passwordFromMacAddress(string2);
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append(string4);
        stringBuilder.append(string3);
        return AdminPasswordService.hashSHA(stringBuilder.toString());
    }

    private static String passwordFromMacAddress(String string2) {
        int n;
        int n2 = string2.length();
        char[] arrc = new char[12];
        if (string2 != null && n2 >= (n = 6)) {
            String string3 = string2.substring(string2.length() - n);
            int n3 = 0;
            while (n3 < n2 && n3 < n) {
                char c = string3.charAt(n3);
                StringBuilder stringBuilder = new StringBuilder();
                stringBuilder.append("");
                stringBuilder.append(c);
                int n4 = Integer.parseInt((String)stringBuilder.toString(), (int)16);
                int n5 = 15 - n4 % 15;
                double d = n4;
                long l = 6L * Math.round((double)Math.pow((double)d, (double)3.0));
                int n6 = n3;
                int n7 = (int)(l + 9L * Math.round((double)Math.pow((double)d, (double)2.0)) + (long)(n4 * 7)) % 70;
                double d2 = n5;
                int n8 = (int)(8L * Math.round((double)Math.pow((double)d2, (double)3.0)) + 3L * Math.round((double)Math.pow((double)d2, (double)2.0)) + (long)(n5 * 5)) % 70;
                int n9 = n6 * 2;
                arrc[n9] = M2M_PASSWORD_HASH_ARAMIS.charAt(n7);
                arrc[n9 + 1] = M2M_PASSWORD_HASH_ARAMIS.charAt(n8);
                n3 = n6 + 1;
                n = 6;
            }
        }
        return new String(arrc);
    }
}