So I already posted a question about that and got no answer so I will be more precise this time. My problem is this one: I have my Android app accessing internet perfectly when it is used on the emulator however as soon as I use it on my phone I keep receiving
UnknownHostException
I have changed my manifest to allow a connection to internet, my phone is running on android 4.3, the WiFi is "on", everything is fine on my phone I can connect to my web browser, Facebook... with my phone but when I launch my application I get this exception. Here is my code:
package com.example.sslcient;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLPeerUnverifiedException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.os.StrictMode;
import android.support.v7.appcompat.R.color;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class SSLClientActivity extends Activity {
private EditText web_address_et;
private EditText port_number_et;
private TextView connection_information_tv;
private Certificate[] certs;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sslclient);
//Allowing to access the network
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
//Getting the GUI user input information
web_address_et = (EditText)findViewById(R.id.editText1);
port_number_et = (EditText)findViewById(R.id.editText2);
connection_information_tv = (TextView)findViewById(R.id.textView3);
findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
findViewById(R.id.button1).setBackgroundColor(Color.CYAN);
findViewById(R.id.button2).setBackgroundColor(color.button_material_dark);
if (web_address_et.getText().toString().matches("")
|| port_number_et.getText().toString().matches("")) {
connection_information_tv.setText("Please fill the URL and Port# fields!");
}
else {
try {
InetAddress host = InetAddress.getByName(web_address_et.getText().toString());
//Android default behaviour (do not accept untrusted certificate)
SSLSocketFactory socketFactory = (SSLSocketFactory)SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket)socketFactory.createSocket(host,
Integer.parseInt(port_number_et.getText().toString()));
socket.startHandshake();
printSSLSessionInfo(socket, socket.getSession());
socket.close();
} catch (UnknownHostException e) {
connection_information_tv.setText(e.toString());
} catch (SSLPeerUnverifiedException e) {
connection_information_tv.setText(e.toString());
} catch (IOException e) {
connection_information_tv.setText(e.toString());
}
}
}
});
findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
findViewById(R.id.button1).setBackgroundColor(color.button_material_dark);
findViewById(R.id.button2).setBackgroundColor(Color.CYAN);
if (web_address_et.getText().toString().matches("")
|| port_number_et.getText().toString().matches("")) {
connection_information_tv.setText("Please fill the URL and Port# fields!");
}
else {
try {
InetAddress host = InetAddress.getByName(web_address_et.getText().toString());
//Naive custom TrustManager (empty checkServerTrusted)
SSLContext sslContext = SSLContext.getInstance("SSL");
TrustManager trustManagerNaive = new X509TrustManager(){
@Override
public void checkClientTrusted(
X509Certificate[] chain,
String authType)
throws CertificateException {
// TODO Auto-generated method stub
}
@Override
public X509Certificate[] getAcceptedIssuers() {
// TODO Auto-generated method stub
return null;
}
@Override
public void checkServerTrusted(
X509Certificate[] chain,
String authType)
throws CertificateException {
// TODO Auto-generated method stub
}
};
sslContext.init(null, new TrustManager[]{trustManagerNaive}, new SecureRandom());
SSLSocketFactory socketFactory = (SSLSocketFactory)sslContext.getSocketFactory();
SSLSocket socket = (SSLSocket)socketFactory.createSocket(host,
Integer.parseInt(port_number_et.getText().toString()));
socket.startHandshake();
printSSLSessionInfo(socket, socket.getSession());
socket.close();
} catch (UnknownHostException e) {
connection_information_tv.setText(e.toString());
} catch (NoSuchAlgorithmException e) {
connection_information_tv.setText(e.toString());
} catch (KeyManagementException e) {
connection_information_tv.setText(e.toString());
} catch (SSLPeerUnverifiedException e) {
connection_information_tv.setText(e.toString());
} catch (IOException e) {
connection_information_tv.setText(e.toString());
}
}
}
});
}
private void printSSLSessionInfo(SSLSocket socket, SSLSession sslSession) throws SSLPeerUnverifiedException {
String certIssuerDN = "";
certs = sslSession.getPeerCertificates();
for (Certificate cert : certs) {
System.out.println("Certificate is: " + cert);
if(cert instanceof X509Certificate) {
X509Certificate x = (X509Certificate ) cert;
certIssuerDN = certIssuerDN + x.getIssuerDN() + "\n";
}
}
connection_information_tv.setText(
"SSL session id: " + sslSession.getId() +
" | Valid session? " + sslSession.isValid() +
"\nPeer host/port: " + sslSession.getPeerHost() + "/" + sslSession.getPeerPort() +
"\nRequire client authentificartion: " + socket.getNeedClientAuth() +
"\nProtocol: " + sslSession.getProtocol() +
"\nCipher suite: " + sslSession.getCipherSuite() +
"\n\nCertificates retrieved: " + certs.length +
"\n" + certIssuerDN
);
}
}
Here is my manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sslcient"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission
android:name="android.permission.INTERNET" />
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".SSLClientActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Please I really need help, I don't understand what is going wrong that should work!
