From 13dd59f226be494fc7a9b5f486e4273102fe1469 Mon Sep 17 00:00:00 2001
From: Michelle Tang <mtang@signal.org>
Date: Thu, 6 Jun 2024 12:09:00 -0700
Subject: [PATCH] Skip biometrics check if unavailable when linking a device.

---
 .../thoughtcrime/securesms/BiometricDeviceAuthentication.kt | 4 ++++
 .../securesms/linkdevice/AddLinkDeviceFragment.kt           | 6 +++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/BiometricDeviceAuthentication.kt b/app/src/main/java/org/thoughtcrime/securesms/BiometricDeviceAuthentication.kt
index ffc4363ba7..ea29d878c9 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/BiometricDeviceAuthentication.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/BiometricDeviceAuthentication.kt
@@ -35,6 +35,10 @@ class BiometricDeviceAuthentication(
     private val DISALLOWED_BIOMETRIC_VERSIONS = setOf(28, 29)
   }
 
+  fun canAuthenticate(): Boolean {
+    return biometricManager.canAuthenticate(ALLOWED_AUTHENTICATORS) == BiometricManager.BIOMETRIC_SUCCESS
+  }
+
   fun authenticate(context: Context, force: Boolean, showConfirmDeviceCredentialIntent: () -> Unit): Boolean {
     val isKeyGuardSecure = ServiceUtil.getKeyguardManager(context).isKeyguardSecure
 
diff --git a/app/src/main/java/org/thoughtcrime/securesms/linkdevice/AddLinkDeviceFragment.kt b/app/src/main/java/org/thoughtcrime/securesms/linkdevice/AddLinkDeviceFragment.kt
index 70a20d21ba..01676a5c12 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/linkdevice/AddLinkDeviceFragment.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/linkdevice/AddLinkDeviceFragment.kt
@@ -113,7 +113,11 @@ class AddLinkDeviceFragment : ComposeFragment() {
       onQrCodeScanned = { data -> viewModel.onQrCodeScanned(data) },
       onQrCodeApproved = {
         viewModel.onQrCodeApproved()
-        biometricAuth.authenticate(requireContext(), true) { biometricDeviceLockLauncher.launch(getString(R.string.BiometricDeviceAuthentication__signal)) }
+        if (biometricAuth.canAuthenticate()) {
+          biometricAuth.authenticate(requireContext(), true) { biometricDeviceLockLauncher.launch(getString(R.string.BiometricDeviceAuthentication__signal)) }
+        } else {
+          viewModel.addDevice()
+        }
       },
       onQrCodeDismissed = { viewModel.onQrCodeDismissed() },
       onQrCodeRetry = { viewModel.onQrCodeScanned(state.url) },