Wire in fallback key selection flow (#958)

Co-authored-by: Fabian Henneke <[email protected]>
(cherry picked from commit 084b833)

Author: msfjarvis

app/src/main/AndroidManifest.xml

@@ -81,6 +81,11 @@
             android:parentActivityName=".PasswordStore"
             android:windowSoftInputMode="adjustResize" />
 
+        <activity
+            android:name=".crypto.GetKeyIdsActivity"
+            android:parentActivityName=".PasswordStore"
+            android:theme="@style/NoBackgroundTheme" />
+
         <service
             android:name=".autofill.AutofillService"
             android:enabled="@bool/enable_accessibility_autofill"

app/src/main/java/com/zeapo/pwdstore/crypto/GetKeyIdsActivity.kt

@@ -0,0 +1,74 @@
+/*
+ * Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package com.zeapo.pwdstore.crypto
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.result.IntentSenderRequest
+import androidx.activity.result.contract.ActivityResultContracts.StartIntentSenderForResult
+import androidx.lifecycle.lifecycleScope
+import com.github.ajalt.timberkt.e
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import me.msfjarvis.openpgpktx.util.OpenPgpApi
+import me.msfjarvis.openpgpktx.util.OpenPgpUtils
+import org.openintents.openpgp.IOpenPgpService2
+
+class GetKeyIdsActivity : BasePgpActivity() {
+
+    private val userInteractionRequiredResult = registerForActivityResult(StartIntentSenderForResult()) { result ->
+        if (result.data == null || result.resultCode == RESULT_CANCELED) {
+            setResult(RESULT_CANCELED, result.data)
+            finish()
+            return@registerForActivityResult
+        }
+        getKeyIds(result.data!!)
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        bindToOpenKeychain(this)
+    }
+
+    override fun onBound(service: IOpenPgpService2) {
+        super.onBound(service)
+        getKeyIds()
+    }
+
+    override fun onError(e: Exception) {
+        e(e)
+    }
+
+    /**
+     * Get the Key ids from OpenKeychain
+     */
+    private fun getKeyIds(data: Intent = Intent()) {
+        data.action = OpenPgpApi.ACTION_GET_KEY_IDS
+        lifecycleScope.launch(Dispatchers.IO) {
+            api?.executeApiAsync(data, null, null) { result ->
+                when (result?.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) {
+                    OpenPgpApi.RESULT_CODE_SUCCESS -> {
+                        try {
+                            val ids = result.getLongArrayExtra(OpenPgpApi.RESULT_KEY_IDS)?.map {
+                                OpenPgpUtils.convertKeyIdToHex(it)
+                            } ?: emptyList()
+                            val keyResult = Intent().putExtra(OpenPgpApi.EXTRA_KEY_IDS, ids.toTypedArray())
+                            setResult(RESULT_OK, keyResult)
+                            finish()
+                        } catch (e: Exception) {
+                            e(e)
+                        }
+                    }
+                    OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED -> {
+                        val sender = getUserInteractionRequestIntent(result)
+                        userInteractionRequiredResult.launch(IntentSenderRequest.Builder(sender).build())
+                    }
+                    OpenPgpApi.RESULT_CODE_ERROR -> handleError(result)
+                }
+            }
+        }
+    }
+}