Merge pull request #8 from TanelOrumaa/integrateNFC

The UI and NFC class now work together. Iteration 2 related functionality.

MobileAuthApp/app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.tarkvaraprojekt.mobileauthapp">
 
+    <uses-permission android:name="android.permission.NFC" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/AuthFragment.kt

@@ -1,15 +1,23 @@
 package com.tarkvaraprojekt.mobileauthapp
 
+import android.app.Activity
+import android.content.Context
+import android.nfc.NfcAdapter
+import android.nfc.tech.IsoDep
 import android.os.Bundle
 import android.os.CountDownTimer
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
 import androidx.navigation.fragment.findNavController
+import com.tarkvaraprojekt.mobileauthapp.NFC.Comms
 import com.tarkvaraprojekt.mobileauthapp.databinding.FragmentAuthBinding
 import com.tarkvaraprojekt.mobileauthapp.model.SmartCardViewModel
+import java.lang.Exception
+import kotlin.concurrent.thread
 
 /**
  * Fragment that asks the user to detect the ID card with mobile NFC chip.
@@ -37,25 +45,61 @@ class AuthFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        timer = object : CountDownTimer(90000, 1000) {
+        timer = object : CountDownTimer((timeRemaining * 1000).toLong(), 1000) {
             override fun onTick(p0: Long) {
-                binding!!.timeCounter.text = getString(R.string.time_left, timeRemaining)
                 timeRemaining--
+                if (timeRemaining == 0) {
+                    binding!!.timeCounter.text = getString(R.string.no_time)
+                } else {
+                    binding!!.timeCounter.text = getString(R.string.time_left, timeRemaining)
+                }
             }
 
             override fun onFinish() {
-                binding!!.timeCounter.text = getString(R.string.no_time)
+                Thread.sleep(750)
+                goToTheStart()
             }
         }.start()
         binding!!.nextButton.setOnClickListener { goToNextFragment() }
         binding!!.cancelButton.setOnClickListener { goToTheStart() }
+        val adapter = NfcAdapter.getDefaultAdapter(activity)
+        if (adapter != null)
+            getInfoFromIdCard(adapter)
+    }
+
+    private fun getInfoFromIdCard(adapter: NfcAdapter) {
+        adapter.enableReaderMode(activity, { tag ->
+            timer.cancel()
+            requireActivity().runOnUiThread {
+                binding!!.timeCounter.text = getString(R.string.card_detected)
+            }
+            val card = IsoDep.get(tag)
+            card.timeout = 32768
+            card.use {
+                try {
+                    val comms = Comms(it, viewModel.userCan)
+                    val response = comms.readPersonalData(byteArrayOf(1, 2, 6))
+                    viewModel.setUserFirstName(response[1])
+                    viewModel.setUserLastName(response[0])
+                    viewModel.setUserIdentificationNumber(response[2])
+                    requireActivity().runOnUiThread{
+                        binding!!.timeCounter.text = getString(R.string.data_read)
+                    }
+                } catch (e: Exception) {
+                    requireActivity().runOnUiThread {
+                        binding!!.timeCounter.text = getString(R.string.no_success)
+                    }
+                    // Gives user some time to read the error message
+                    Thread.sleep(1000)
+                    goToTheStart()
+                } finally {
+                    adapter.disableReaderMode(activity)
+                }
+            }
+        }, NfcAdapter.FLAG_READER_NFC_A, null)
     }
 
     private fun goToNextFragment() {
-        //Dummy data for now
-        viewModel.setUserFirstName("John")
-        viewModel.setUserLastName("Doe")
-        viewModel.setUserIdentificationNumber("012345678910")
         timer.cancel()
         findNavController().navigate(R.id.action_authFragment_to_userFragment)
     }

MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/MainActivity.kt

@@ -1,7 +1,9 @@
 package com.tarkvaraprojekt.mobileauthapp
 
+import android.nfc.NfcAdapter
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.util.Log
 import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment
 import com.tarkvaraprojekt.mobileauthapp.databinding.ActivityMainBinding

MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/NFC/Comms.java

@@ -95,6 +95,10 @@ public class Comms {
         keyMAC = keys[1];
     }
 
+    public byte[] getAuthenticationCertificate() {
+        return new byte[0];
+    }
+
     /**
      * Calculates the message authentication code
      *

MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/PinFragment.kt

@@ -34,6 +34,9 @@ class PinFragment : Fragment() {
 
         binding!!.nextButton.setOnClickListener { goToNextFragment() }
         binding!!.cancelButton.setOnClickListener { goToTheStart() }
+        // Currently PIN 1 is not required and thus this step is immediately skipped.
+        // In the future the UI flow will be changed in the nav_graph.
+        goToNextFragment()
     }
 
     private fun goToNextFragment() {
@@ -44,8 +47,11 @@ class PinFragment : Fragment() {
             )
             findNavController().navigate(R.id.action_pinFragment_to_canFragment)
         } else {
-            Toast.makeText(requireContext(), getString(R.string.length_pin), Toast.LENGTH_SHORT)
+            // Currently it is not important to enter PIN1 so we will allow the user to leave this field empty
-                .show()
+            //Toast.makeText(requireContext(), getString(R.string.length_pin), Toast.LENGTH_SHORT)
+            //    .show()
+            viewModel.setUserPin("1234")
+            findNavController().navigate(R.id.action_pinFragment_to_canFragment)
         }
     }
 

MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/UserFragment.kt

@@ -13,8 +13,8 @@ import com.tarkvaraprojekt.mobileauthapp.model.SmartCardViewModel
 
 /**
  * Fragment that is used to display the persons name and national identification number.
- * Currently needed in order to test that the app is working because the results at the moment
+ * Currently needed in order to test that the app is working and information is read
- * are not sent to some other website or app.
+ * from the ID card via NFC.
  */
 class UserFragment : Fragment() {
 

MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/auth/Authenticator.kt

@@ -0,0 +1,22 @@
+package com.tarkvaraprojekt.mobileauthapp.auth
+
+import android.nfc.tech.IsoDep
+import com.tarkvaraprojekt.mobileauthapp.NFC.Comms
+import java.math.BigInteger
+
+class Authenticator(val comms : Comms) {
+
+    public fun authenticate(nonce: BigInteger, challengeUrl: String, pin1: String) {
+
+        // Ask PIN 1 from the user and get the authentication certificate from the ID card.
+        val authenticationCertificate : ByteArray = comms.getAuthenticationCertificate();
+
+        // Create the authentication token (OpenID X509)
+
+        // Hash the authentication token.
+
+        // Send the authentication token hash to the ID card for signing and get signed authentication token as response.
+
+        // Return the signed authentication token.
+    }
+}

MobileAuthApp/app/src/main/res/values/strings.xml

@@ -10,18 +10,21 @@
     <string name="pin_fragment">Palun sisesta PIN 1</string>
     <string name="enter_pin">PIN 1</string>
     <string name="example_pin">Näide. 1234</string>
-    <string name="length_pin">PIN1 lubatud pikkus on 4-12</string>
+    <string name="length_pin">PIN 1 lubatud pikkus on 4..12</string>
 
     <!-- string resources for CanFragment -->
     <string name="example_can">Näide. 123456</string>
     <string name="text_can">CAN</string>
     <string name="enter_can">Sisesta ID kaardi CAN (Card Access Number)</string>
     <string name="length_can">CANi pikkus on vale</string>
+    <string name="card_detected">Kaart on tuvastatud. Hoia kaarti vastu telefoni.</string>
+    <string name="data_read">Andmed loetud. Võid edasi minna.</string>
 
     <!-- string resources for AuthFragment layout -->
     <string name="auth_instruction_text">ID kaardiga ühenduse loomiseks pane kaart vastu telefoni</string>
     <string name="time_left">Aega on jäänud %d sek</string>
     <string name="no_time">Aeg on otsas</string>
+    <string name="no_success">Vale CAN</string>
 
     <!-- string resources for UserFragment layout -->
     <string name="user_name_label">NIMI</string>