Fill OTP fields with SMS codes (#900)

* Fill OTP fields with SMS codes

* Allow SMS OTP fill also for web origins

* Introduce free and nonFree build variants

* Fix up workflow

* Improve layout and feature detection

* Workflow changes

* Add Changelog entry

* github: update release workflow for nonFree/Free split

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* Switch to lifecycleScope

* github: make snapshot deploy free variant

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

Co-authored-by: Harsh Shandilya <me@msfjarvis.dev>

1 files changed, 136 insertions, 0 deletions

diff --git a/app/src/nonFree/java/com/zeapo/pwdstore/autofill/oreo/ui/AutofillSmsActivity.kt b/app/src/nonFree/java/com/zeapo/pwdstore/autofill/oreo/ui/AutofillSmsActivity.kt
new file mode 100644
index 00000000..02394867
--- /dev/null
+++ b/app/src/nonFree/java/com/zeapo/pwdstore/autofill/oreo/ui/AutofillSmsActivity.kt
@@ -0,0 +1,136 @@
+/*
+ * Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+package com.zeapo.pwdstore.autofill.oreo.ui
+
+import android.app.Activity
+import android.app.PendingIntent
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.content.IntentSender
+import android.os.Build
+import android.os.Bundle
+import android.view.autofill.AutofillManager
+import androidx.annotation.RequiresApi
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import com.github.ajalt.timberkt.e
+import com.github.ajalt.timberkt.w
+import com.google.android.gms.auth.api.phone.SmsCodeRetriever
+import com.google.android.gms.auth.api.phone.SmsRetriever
+import com.google.android.gms.common.ConnectionResult
+import com.google.android.gms.common.GoogleApiAvailability
+import com.google.android.gms.common.api.ResolvableApiException
+import com.google.android.gms.tasks.Tasks
+import com.zeapo.pwdstore.autofill.oreo.AutofillAction
+import com.zeapo.pwdstore.autofill.oreo.Credentials
+import com.zeapo.pwdstore.autofill.oreo.FillableForm
+import com.zeapo.pwdstore.databinding.ActivityOreoAutofillSmsBinding
+import com.zeapo.pwdstore.utils.viewBinding
+import kotlinx.coroutines.launch
+
+@RequiresApi(Build.VERSION_CODES.O)
+class AutofillSmsActivity : AppCompatActivity() {
+
+    companion object {
+
+        private var fillOtpFromSmsRequestCode = 1
+
+        fun shouldOfferFillFromSms(context: Context): Boolean {
+            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P)
+                return false
+            val googleApiAvailabilityInstance = GoogleApiAvailability.getInstance()
+            val googleApiStatus = googleApiAvailabilityInstance.isGooglePlayServicesAvailable(context)
+            if (googleApiStatus != ConnectionResult.SUCCESS) {
+                w { "Google Play Services unavailable or not updated: ${googleApiAvailabilityInstance.getErrorString(googleApiStatus)}" }
+                return false
+            }
+            // https://developer.android.com/guide/topics/text/autofill-services#sms-autofill
+            if (googleApiAvailabilityInstance.getApkVersion(context) < 190056000) {
+                w { "Google Play Service 19.0.56 or higher required for SMS OTP Autofill" }
+                return false
+            }
+            return true
+        }
+
+        fun makeFillOtpFromSmsIntentSender(context: Context): IntentSender {
+            val intent = Intent(context, AutofillSmsActivity::class.java)
+            return PendingIntent.getActivity(
+                context,
+                fillOtpFromSmsRequestCode++,
+                intent,
+                PendingIntent.FLAG_CANCEL_CURRENT
+            ).intentSender
+        }
+    }
+
+    private val binding by viewBinding(ActivityOreoAutofillSmsBinding::inflate)
+
+    private lateinit var clientState: Bundle
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(binding.root)
+        setResult(RESULT_CANCELED)
+        binding.cancelButton.setOnClickListener {
+            finish()
+        }
+    }
+
+    override fun onStart() {
+        super.onStart()
+        clientState = intent?.getBundleExtra(AutofillManager.EXTRA_CLIENT_STATE) ?: run {
+            e { "AutofillSmsActivity started without EXTRA_CLIENT_STATE" }
+            finish()
+            return
+        }
+
+        registerReceiver(smsCodeRetrievedReceiver, IntentFilter(SmsCodeRetriever.SMS_CODE_RETRIEVED_ACTION), SmsRetriever.SEND_PERMISSION, null)
+        lifecycleScope.launch {
+            waitForSms()
+        }
+    }
+
+    // Retry starting the SMS code retriever after a permission request.
+    @Suppress("DEPRECATION")
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        if (resultCode != Activity.RESULT_OK)
+            return
+        lifecycleScope.launch {
+            waitForSms()
+        }
+    }
+
+    private fun waitForSms() {
+        val smsClient = SmsCodeRetriever.getAutofillClient(this@AutofillSmsActivity)
+        try {
+            Tasks.await(smsClient.startSmsCodeRetriever())
+        } catch (e: ResolvableApiException) {
+            e.startResolutionForResult(this, 1)
+        } catch (e: Exception) {
+            e(e)
+            finish()
+        }
+    }
+
+    private val smsCodeRetrievedReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent) {
+            val smsCode = intent.getStringExtra(SmsCodeRetriever.EXTRA_SMS_CODE)
+            val fillInDataset =
+                FillableForm.makeFillInDataset(
+                    this@AutofillSmsActivity,
+                    Credentials(null, null, smsCode),
+                    clientState,
+                    AutofillAction.FillOtpFromSms
+                )
+            setResult(RESULT_OK, Intent().apply {
+                putExtra(AutofillManager.EXTRA_AUTHENTICATION_RESULT, fillInDataset)
+            })
+            finish()
+        }
+    }
+}