Thread: how to decode this java encode

this android java script encode its data before swnding to server.
How to decode it.


package com.app;

import android.content.Intent;
import android.net.Uri.Builder;
import android.os.Bundle;
import android.view.View;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.OnScroll Listener;
import com.app.RVAdapter.ItemClickListener;
import java.io.BufferedInputStream;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.math.BigInteger;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Base64;
import javax.net.ssl.HttpsURLConnection;
import org.json.JSONArray;
import org.json.JSONObject;

public class DreamInterpreterActivity extends AppCompatActivity implements ItemClickListener {
static final /* synthetic */ boolean $assertionsDisabled = false;
BigInteger N;
BigInteger P;
BigInteger PHI;
BigInteger Q;
ArrayList<AppBean> contentList;
BigInteger d;
BigInteger e;
String lang;
Boolean loading = Boolean.valueOf(false);
int page = 1;
byte[] param1;
byte[] param2;
byte[] param3;
byte[] param4;
byte[] param5;
RVAdapter radapter;
RecyclerView recyclerView;

public class LoadContentNamea extends Thread {
String cat = "dreaminterpret";
String lang;
String page = "1";
String service = "APP";
String uri;

public LoadContentNamea(String str, String str2) {
this.lang = str2;
this.uri = str;
}

public void run() {
loadName();
}

public void loadName() {
try {
HttpsURLConnection httpsURLConnection = (HttpsURLConnection) new URL(this.uri).openConnection();
httpsURLConnection.setRequestMethod("POST");
httpsURLConnection.setDoInput(true);
httpsURLConnection.setDoOutput(true);
OutputStream outputStream = httpsURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
DreamInterpreterActivity.this.param1 = encryptMessage(this.service.getBytes());
DreamInterpreterActivity.this.param2 = encryptMessage(this.cat.getBytes());
DreamInterpreterActivity.this.param3 = encryptMessage(this.page.getBytes());
DreamInterpreterActivity.this.param4 = encryptMessage(this.lang.getBytes());
bufferedWriter.write(new Builder().appendQueryParameter("service", Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param1)).appendQueryParameter("cat" , Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param2)).appendQueryParameter("page ", Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param3)).appendQueryParameter("lang ", Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param4)).build().getEncodedQuery()) ;
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
httpsURLConnection.connect();
InputStreamReader inputStreamReader = new InputStreamReader(new BufferedInputStream(httpsURLConnection.getInputStr eam()));
String str = "";
for (int read = inputStreamReader.read(); read != -1; read = inputStreamReader.read()) {
str = str + ((char) read);
}
DreamInterpreterActivity.this.contentList.clear();
JSONArray jSONArray = new JSONArray(new JSONObject(str).getString("content"));
for (int i = 0; i < jSONArray.length(); i++) {
JSONObject jSONObject = jSONArray.getJSONObject(i);
DreamInterpreterActivity.this.contentList.add(new AppBean(jSONObject.getString("title"), jSONObject.getString("desc"), jSONObject.getString("url")));
}
} catch (Exception e) {
e.printStackTrace();
}
DreamInterpreterActivity.this.runOnUiThread(new Runnable() {
public void run() {
try {
DreamInterpreterActivity.this.recyclerView.setAdap ter(DreamInterpreterActivity.this.radapter);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

public byte[] encryptMessage(byte[] bArr) {
return new BigInteger(bArr).modPow(DreamInterpreterActivity.t his.e, DreamInterpreterActivity.this.N).toByteArray();
}
}

public class LoadContentPagea extends Thread {
String cat = "dreaminterpret";
String lang;
int page;
String service = "APP";
String uri;

public LoadContentPagea(String str, String str2, int i) {
this.lang = str2;
this.page = i;
this.uri = str;
}

public void run() {
loadName();
}

public void loadName() {
try {
HttpURLConnection httpURLConnection = (HttpURLConnection) new URL(this.uri).openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
DreamInterpreterActivity.this.param1 = encryptMessage(this.service.getBytes());
DreamInterpreterActivity.this.param2 = encryptMessage(this.cat.getBytes());
DreamInterpreterActivity.this.param3 = encryptMessage(this.lang.getBytes());
DreamInterpreterActivity.this.param4 = encryptMessage(String.valueOf(this.page).getBytes( ));
bufferedWriter.write(new Builder().appendQueryParameter("service", Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param1)).appendQueryParameter("cat" , Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param2)).appendQueryParameter("lang ", Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param3)).appendQueryParameter("page ", Base64.getEncoder().encodeToString(DreamInterprete rActivity.this.param4)).build().getEncodedQuery()) ;
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
httpURLConnection.connect();
InputStreamReader inputStreamReader = new InputStreamReader(new BufferedInputStream(httpURLConnection.getInputStre am()));
String str = "";
for (int read = inputStreamReader.read(); read != -1; read = inputStreamReader.read()) {
str = str + ((char) read);
}
JSONArray jSONArray = new JSONArray(new JSONObject(str).getString("content"));
for (int i = 0; i < jSONArray.length(); i++) {
JSONObject jSONObject = jSONArray.getJSONObject(i);
DreamInterpreterActivity.this.radapter.addItem(new AppBean(jSONObject.getString("title"), jSONObject.getString("desc"), jSONObject.getString("url")), DreamInterpreterActivity.this.radapter.getItemCoun t());
}
DreamInterpreterActivity.this.loading = Boolean.valueOf(false);
} catch (Exception e) {
e.printStackTrace();
}
}

public byte[] encryptMessage(byte[] bArr) {
return new BigInteger(bArr).modPow(DreamInterpreterActivity.t his.e, DreamInterpreterActivity.this.N).toByteArray();
}
}

protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(2131558428);
setTitle(getIntent().getStringExtra("title"));
getSupportActionBar().setDisplayHomeAsUpEnabled(tr ue);
this.lang = getSharedPreferences("SharedPStarter", null).getString("lang", "en");
bundle = new ArrayList();
this.contentList = bundle;
String str = "";
bundle.add(new AppBean("....", str, str, str));
this.P = new BigInteger("15531264523032092445061482367039862261 01073803652684979219159091230094020310263339292786 62088657907130837223635828264753869964405361830526 94548126782024071096720296475981529992268440853168 20946882098910988844641079508175103482966364984804 84668564549263259489994437590053411791522985751406 648572583536572730339");
bundle = new BigInteger("12567543114943531465972923509396892665 08794029848363082650550036427689330583480231634199 99026296585335843640068292735772411686492962278789 97072989895447873650503591608816876410215034745547 00817480083529392220596218550490953616343761954959 98795426343384734273252093585426952828182015434219 718994352231162016873");
this.Q = bundle;
this.N = this.P.multiply(bundle);
this.PHI = this.P.subtract(BigInteger.ONE).multiply(this.Q.su btract(BigInteger.ONE));
this.e = new BigInteger("72218869861855126248782339845073418099 10885989969871150112836183513172779370631312755231 61328944344951022593615317670859665941689291703018 5338371794861199");
while (this.PHI.gcd(this.e).compareTo(BigInteger.ONE) > null && this.e.compareTo(this.PHI) < null) {
this.e.add(BigInteger.ONE);
System.out.println(this.e);
}
RecyclerView recyclerView = (RecyclerView) findViewById(2131362211);
this.recyclerView = recyclerView;
recyclerView.setLayoutManager(new LinearLayoutManager(this));
bundle = new RVAdapter(this, this.contentList, "dreaninterpret");
this.radapter = bundle;
bundle.setClickListener(this);
this.recyclerView.setAdapter(this.radapter);
this.recyclerView.addOnScrollListener(new OnScrollListener() {
public void onScrollStateChanged(RecyclerView recyclerView, int i) {
Boolean valueOf = Boolean.valueOf(true);
if (recyclerView.canScrollVertically(1) != null) {
return;
}
if (DreamInterpreterActivity.this.loading.booleanValu e() == null) {
DreamInterpreterActivity.this.loading = valueOf;
recyclerView = DreamInterpreterActivity.this;
recyclerView.page++;
i = DreamInterpreterActivity.this;
new LoadContentPagea("https://site.com", i.lang, DreamInterpreterActivity.this.page).start();
return;
}
DreamInterpreterActivity.this.loading = valueOf;
}
});
new LoadContentNamea("https://site.com", this.lang).start();
}

public void onItemClick(View view, int i) {
view = new Intent(this, ItemPlayer.class);
view.putExtra("title", ((AppBean) this.contentList.get(i)).getTitle());
view.putExtra("desc", ((AppBean) this.contentList.get(i)).getDesc());
view.putExtra("url", "/DreamInterpretor/" + this.lang + "/" + ((AppBean) this.contentList.get(i)).getUrl());
startActivity(view);
}

public boolean onSupportNavigateUp() {
finish();
return true;
}
}