Android-2FA-with-Google-authenticator

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Android-2FA-with-Google-authenticator

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Example for implementing two factor authentication in Android using Twilio's Authy API and firebase. | TUTORIAL : https://pragmatictheories.tech/android-implementing-two-step-authentication-through-google-authenticator/

Android-2FA-with-Google-authenticator 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# Two-factor authentication in Android - Using Authy API
This is a sample for implementing two-factor authentication in Android using [Authy API](https://www.twilio.com/docs/authy/api)

## Description

You can use this project and the following tutorials to implement:

* ### Two-factor authentication using Google authenticator on a different device (using QR codes)

Tutorial: [Android - Implementing two-step authentication through Google authenticator](https://www.pragmatictheories.tech/android-implementing-two-step-authentication-through-google-authenticator)

<img src="https://raw.githubusercontent.com/AmalH/Android-2FA-with-Google-authenticator/master/screenshots/2fagoogleAuthenticator1.png"/>

```Java
/** get auth creds from previous activity **/
        Bundle extras = getIntent().getExtras();
        if (extras != null) {
            userId= extras.getString("userId");
        }
        qrCodeCallUrl="https://api.authy.com/protected/json/users/"+userId+"/secret?api_key=CCb8fPiHfTdFp332cefjTuRjgMNprVOx";

/** call authy api to get qr code **/
 JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST,qrCodeCallUrl,null,
 new Response.Listener<JSONObject>() {
 @Override
 public void onResponse(JSONObject response) {
 try {
 String qrCodePath = response.getString("qr_code");
 /** set the imageView's src **/
 ImageView qrCodeImgVw = findViewById(R.id.qrCodeImgVw);
 Picasso.get().load(qrCodePath).into(qrCodeImgVw);
 } catch (JSONException e) {
 e.printStackTrace();
 }
 }
 },
 new Response.ErrorListener() {
 @Override
 public void onErrorResponse(VolleyError error) {
 Log.e("ERROR! ",error.getMessage());
 }
 });
 (AppSingleton.getInstance(getApplicationContext()).getRequestQueue()).add(jsObjRequest);

/** pass the code provided by user to the Authy API to verify it **/
        (findViewById(R.id.confirmSignupBtn)).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Statics.validateSecurityCode(((EditText)findViewById(R.id.validationCode)).getText().toString(),userId,QRCodeActivity.this,
                        ((EditText)findViewById(R.id.validationCode)),((TextView)findViewById(R.id.errorTxt)));
            }
        });
    
```

* ### Two-factor authentication using Google authenticator on user device

Tutorial: [Android - Implementing two-step authentication through Google authenticator](https://www.pragmatictheories.tech/android-implementing-two-step-authentication-through-google-authenticator)

```java
/*************************************************************************************************
         *                       2FA using Authenticator app on this device *
*  **********************************************************************************************/
(findViewById(R.id.authAppOnThisPhone)).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Statics.usersTable.child(FirebaseAuth.getInstance().getCurrentUser().getUid()).addListenerForSingleValueEvent(new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {

/** 1.Get user's creds! phone number included.. **/
                        email = (dataSnapshot.getValue(User.class)).getEmailAddress();
                        username = (dataSnapshot.getValue(User.class)).getFirstName()+" "+(dataSnapshot.getValue(User.class)).getLastName();
                        phoneNumber = (dataSnapshot.getValue(User.class)).getPhoneNumber();
                        countryCode = (dataSnapshot.getValue(User.class)).getPhoneCountryCode();
                        addUserUrl  = "https://api.authy.com/protected/json/users/new?user[email]="+email
                                +"&user[cellphone]="+phoneNumber
                                +"&user[country_code]="+countryCode+"&api_key=CCb8fPiHfTdFp332cefjTuRjgMNprVOx";

/** 2.Add the user to the Authy API **/
 // post call for Authy api to add a user | response contains the added user's id
 JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST,addUserUrl,null,
 new Response.Listener<JSONObject>() {
 @Override
 public void onResponse(JSONObject response) {
 Gson gson = new Gson();
 try {
 /** get the returned id **/
 JsonObject addedUser = gson.fromJson(response.getString("user"),JsonObject.class);
 addedUserId = (addedUser.get("id")).getAsString();
 //Toast.makeText(getApplicationContext(), "Res: "+addedUserId, Toast.LENGTH_LONG).show();
 /** 3.Call the Authy API to generate appropriate passcode
 * then open GoogleAuthenticator on this device to use it ! **/
 String uri = "otpauth://totp/AdsChain:" + email + "?secret=" + "811854" + "&issuer=AdsChain";
 Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
 getContext().startActivity(intent);
 /** 4.Ask user for passcode and validate it **/
 AlertDialog.Builder alertDialog = new AlertDialog.Builder(getContext());
 ...
										 ...
 alertDialog.setPositiveButton("Validate",
 new DialogInterface.OnClickListener() {
 public void onClick(DialogInterface dialog, int which) {
 /** call authy api to validate code provided by the user **/
 Statics.validateSecurityCode(input.getText().toString(),addedUserId,getContext());
 }
 });
										 ...
 alertDialog.show();
 } catch (JSONException e) {
 e.printStackTrace();
 }
 }
 },
 new Response.ErrorListener() {
 @Override
 public void onErrorResponse(VolleyError error) {
 Log.e("ERROR! ",error.getMessage());
 }
 });
 (AppSingleton.getInstance(getContext()).getRequestQueue()).add(jsObjRequest);

}
                });
            }
        });        
```

* ### Two-factor authentication using SMS code

Tutorial: [Android - Implementing two-step authentication through SMS code](https://www.pragmatictheories.tech/android-implementing-two-step-authentication-through-sms-code)

```java
/*************************************************************************************************
         *                      2FA using text messages *
*  **********************************************************************************************/
 (findViewById(R.id.smsOptionLyt)).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dismiss();
                Statics.usersTable.child(FirebaseAuth.getInstance().getCurrentUser().getUid()).addListenerForSingleValueEvent(new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {

/** 1.Get user's creds! phone number included.. **/
                        email = (dataSnapshot.getValue(User.class)).getEmailAddress();
                        username = (dataSnapshot.getValue(User.class)).getFirstName() + " " + (dataSnapshot.getValue(User.class)).getLastName();
                        phoneNumber = (dataSnapshot.getValue(User.class)).getPhoneNumber();
                        countryCode = (dataSnapshot.getValue(User.class)).getPhoneCountryCode();
                        addUserUrl = "https://api.authy.com/protected/json/users/new?user[email]=" + email
                                + "&user[cellphone]=" + phoneNumber
                                + "&user[country_code]=" + countryCode + "&api_key=CCb8fPiHfTdFp332cefjTuRjgMNprVOx";

/** 2.Add the user to the Authy API **/
 // post call for Authy api to add a user | response contains the added user's id
 JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST, addUserUrl, null,
 new Response.Listener<JSONObject>() {
 @Override
 public void onResponse(JSONObject response) {
 Gson gson = new Gson();
 try {
 /** get the returned id **/
 JsonObject addedUser = gson.fromJson(response.getString("user"), JsonObject.class);
 addedUserId = (addedUser.get("id")).getAsString();
 /** 3.call the Authy API to send a code through sms **/
 /** 4.call the Authy API to validate code provided by user [embedded in sendSecurityCodeTo method **/
 sendSecurityCodeTo(addedUserId);
 } catch (JSONException e) {
 e.printStackTrace();
 }
 }
 },
 new Response.ErrorListener() {
 @Override
 public void onErrorResponse(VolleyError error) {
 Log.e("ERROR! ", "ee: " + error.getMessage());
 }
 });
 (AppSingleton.getInstance(getContext()).getRequestQueue()).add(jsObjRequest);

}

@Override
                    public void onCancelled(DatabaseError databaseError) {
                        throw databaseError.toException();
                    }
                });
            }
        });       
```

## Getting started

Clone this repository and import into Android Studio
```
git clone https://github.com/AmalH/Android-2FA-with-Google-authenticator.git
```
### Pre-requisites
* Android SDK 27
* Android Build Tools v27.0.3
* Android Support Repository

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