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package se.leap.leapclient;
import java.io.IOException;
import java.math.BigInteger;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import com.jordanzimmerman.SRPClientSession;
import com.jordanzimmerman.SRPConstants;
import com.jordanzimmerman.SRPFactory;
import se.leap.leapclient.ProviderListContent.ProviderItem;
import android.app.IntentService;
import android.content.Intent;
import android.os.Bundle;
import android.os.ResultReceiver;
import android.util.Log;
public class ProviderAPI extends IntentService {
public ProviderAPI() {
super("ProviderAPI");
Log.v("ClassName", "Provider API");
}
@Override
protected void onHandleIntent(Intent task_for) {
final ResultReceiver receiver = task_for.getParcelableExtra("receiver");
Bundle task;
System.out.println("onHandleIntent called");
if((task = task_for.getBundleExtra(ConfigHelper.downloadJsonFilesBundleExtra)) != null) {
if(!downloadJsonFiles(task))
receiver.send(ConfigHelper.INCORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY);
else
receiver.send(ConfigHelper.CORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY);
}
else if ((task = task_for.getBundleExtra(ConfigHelper.downloadNewProviderDotJSON)) != null) {
boolean custom = true;
String provider_main_url = (String) task.get(ConfigHelper.provider_key_url);
String provider_name = provider_main_url.replaceFirst("http[s]?://", "").replaceFirst("\\/", "_");
String provider_json_url = guessURL(provider_main_url);
try {
JSONObject provider_json = getJSONFromProvider(provider_json_url);
String filename = provider_name + "_provider.json".replaceFirst("__", "_");
ConfigHelper.saveFile(filename, provider_json.toString());
ProviderListContent.addItem(new ProviderItem(provider_name, ConfigHelper.openFileInputStream(filename), custom));
receiver.send(ConfigHelper.CUSTOM_PROVIDER_ADDED, Bundle.EMPTY);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else if ((task = task_for.getBundleExtra(ConfigHelper.srpRegister)) != null) {
if(!registerWithSRP(task))
receiver.send(ConfigHelper.SRP_REGISTRATION_FAILED, Bundle.EMPTY);
else
receiver.send(ConfigHelper.SRP_REGISTRATION_SUCCESSFUL, Bundle.EMPTY);
}
else if ((task = task_for.getBundleExtra(ConfigHelper.srpAuth)) != null) {
if(!authenticateBySRP(task))
receiver.send(ConfigHelper.SRP_AUTHENTICATION_FAILED, Bundle.EMPTY);
else
receiver.send(ConfigHelper.SRP_AUTHENTICATION_SUCCESSFUL, Bundle.EMPTY);
}
}
private boolean downloadJsonFiles(Bundle task) {
String cert_url = (String) task.get(ConfigHelper.cert_key);
String eip_service_json_url = (String) task.get(ConfigHelper.eip_service_key);
try {
String cert_string = getStringFromProvider(cert_url);
JSONObject cert_json = new JSONObject("{ \"certificate\" : \"" + cert_string + "\"}");
ConfigHelper.saveSharedPref(ConfigHelper.cert_key, cert_json);
JSONObject eip_service_json = getJSONFromProvider(eip_service_json_url);
ConfigHelper.saveSharedPref(ConfigHelper.eip_service_key, eip_service_json);
return true;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return false;
} catch (JSONException e) {
ConfigHelper.rescueJSONException(e);
return false;
} catch(Exception e) {
e.printStackTrace();
return false;
}
}
private boolean registerWithSRP(Bundle task) {
String username = (String) task.get(ConfigHelper.username_key);
String password = (String) task.get(ConfigHelper.password_key);
String authentication_server = (String) task.get(ConfigHelper.srp_server_url_key);
BigInteger ng_1024 = new BigInteger(ConfigHelper.NG_1024, 16);
BigInteger salt = ng_1024.probablePrime(1024, null);
byte[] salt_in_bytes = salt.toByteArray();
return false;
}
private boolean authenticateBySRP(Bundle task) {
String username = (String) task.get(ConfigHelper.username_key);
String password = (String) task.get(ConfigHelper.password_key);
String authentication_server = (String) task.get(ConfigHelper.srp_server_url_key);
SRPConstants constants = new SRPConstants(new BigInteger(ConfigHelper.NG_1024, 16), ConfigHelper.g);
SRPFactory factory = SRPFactory.getInstance(constants);
SRPClientSession session = factory.newClientSession(password.getBytes());
session.setSalt_s(new BigInteger("1"));
byte[] A = session.getPublicKey_A().toString(16).getBytes();
try {
JSONObject saltAndB = sendAToSRPServer(authentication_server, username, getHexString(A));
String B = saltAndB.getString("B");
String salt = saltAndB.getString("salt");
session.setSalt_s(new BigInteger(salt, 16));
session.setServerPublicKey_B(new BigInteger(B, 16));
byte[] M1 = session.getEvidenceValue_M1().toString(16).getBytes();
byte[] M2 = sendM1ToSRPServer(authentication_server, username, M1);
session.validateServerEvidenceValue_M2(new BigInteger(getHexString(M2), 16));
return true;
} catch (ClientProtocolException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return false;
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return false;
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return false;
}
}
public static String getHexString(byte[] b) {
String result = "";
StringBuffer sb = new StringBuffer();
for (byte tmp : b) {
sb.append(Integer.toHexString((int) (tmp & 0xff)));
}
return sb.toString();
// for (int i=0; i < b.length; i++) {
// result +=
// Integer.toString( ( b[i] & 0xff ) + 0x100, 16).substring( 1 );
// }
// return result;
}
private JSONObject sendAToSRPServer(String server_url, String username, String clientA) throws ClientProtocolException, IOException, JSONException {
DefaultHttpClient client = new LeapHttpClient(getApplicationContext());
String parameter_chain = "A" + "=" + clientA + "&" + "login" + "=" + username;
HttpPost post = new HttpPost(server_url + "/sessions.json" + "?" + parameter_chain);
HttpResponse getResponse = client.execute(post);
HttpEntity responseEntity = getResponse.getEntity();
String plain_response = new Scanner(responseEntity.getContent()).useDelimiter("\\A").next();
JSONObject json_response = new JSONObject(plain_response);
if(!json_response.isNull("errors") || json_response.has("errors")) {
return new JSONObject();
}
List<Cookie> cookies = client.getCookieStore().getCookies();
if(!cookies.isEmpty()) {
String session_id = cookies.get(0).getValue();
}
return json_response;
}
private byte[] sendAToSRPServer(String server_url, String username, byte[] clientA) throws ClientProtocolException, IOException, JSONException {
DefaultHttpClient client = new LeapHttpClient(getApplicationContext());
String parameter_chain = "A" + "=" + getHexString(clientA) + "&" + "login" + "=" + username;
HttpPost post = new HttpPost(server_url + "/sessions.json" + "?" + parameter_chain);
HttpResponse getResponse = client.execute(post);
HttpEntity responseEntity = getResponse.getEntity();
String plain_response = new Scanner(responseEntity.getContent()).useDelimiter("\\A").next();
JSONObject json_response = new JSONObject(plain_response);
if(!json_response.isNull("errors") || json_response.has("errors")) {
return new byte[0];
}
List<Cookie> cookies = client.getCookieStore().getCookies();
if(!cookies.isEmpty()) {
String session_id = cookies.get(0).getValue();
}
return json_response.getString("B").getBytes();
}
private byte[] sendM1ToSRPServer(String server_url, String username, byte[] m1) throws ClientProtocolException, IOException, JSONException {
DefaultHttpClient client = new LeapHttpClient(getApplicationContext());
String parameter_chain = "client_auth" + "=" + getHexString(m1);
HttpPut put = new HttpPut(server_url + "/sessions/" + username +".json" + "?" + parameter_chain);
HttpResponse getResponse = client.execute(put);
HttpEntity responseEntity = getResponse.getEntity();
String plain_response = new Scanner(responseEntity.getContent()).useDelimiter("\\A").next();
JSONObject json_response = new JSONObject(plain_response);
if(!json_response.isNull("errors") || json_response.has("errors")) {
return new byte[0];
}
List<Cookie> cookies = client.getCookieStore().getCookies();
String session_id = cookies.get(0).getValue();
return json_response.getString("M2").getBytes();
}
private String guessURL(String provider_main_url) {
return provider_main_url + "/provider.json";
}
private String getStringFromProvider(String string_url) throws IOException {
String json_file_content = "";
DefaultHttpClient client = new LeapHttpClient(getApplicationContext());
HttpGet get = new HttpGet(string_url);
// Execute the GET call and obtain the response
HttpResponse getResponse = client.execute(get);
HttpEntity responseEntity = getResponse.getEntity();
json_file_content = new Scanner(responseEntity.getContent()).useDelimiter("\\A").next();
return json_file_content;
}
private JSONObject getJSONFromProvider(String json_url) throws IOException, JSONException {
String json_file_content = getStringFromProvider(json_url);
return new JSONObject(json_file_content);
}
}
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