Re-add keepass2android plugin

README.md

@@ -29,6 +29,9 @@
 
 ## ⭐ Features
 
+- Two storage modes, chosen on first start (switchable later from the launcher):
+  - **Standalone**: opens a `.kdbx` database directly (bundled KeePassDX engine)
+  - **Keepass2Android plugin**: queries and creates entries through the installed Keepass2Android app
 - Search entries in Keepass Database
 - Scan & Create entries
 - Recently used history for fast access

app/src/main/AndroidManifest.xml

@@ -1,20 +1,45 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
     <uses-feature android:name="android.hardware.camera" />
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.READ_MEDIA_VISUAL_USER_SELECTED" />
 
+    <!-- Keepass2Android plugin mode: make the KP2A activities resolvable from this app -->
+    <queries>
+        <intent>
+            <action android:name="keepass2android.ACTION_QUERY_CREDENTIALS_FOR_OWN_PACKAGE" />
+        </intent>
+        <intent>
+            <action android:name="keepass2android.ACTION_START_WITH_TASK" />
+        </intent>
+        <package android:name="keepass2android.keepass2android" />
+        <package android:name="keepass2android.keepass2android_nonet" />
+    </queries>
+
     <application
         android:icon="@mipmap/ic_launcher_round"
         android:label="${APP_NAME}"
         android:supportsRtl="true">
         <activity
             android:name=".activity.MainActivity"
-            android:exported="true">
+            android:exported="true"
+            android:launchMode="singleTask">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <receiver
+            android:name=".pluginSDK.PluginAccessBroadcastReceiver"
+            android:exported="true"
+            tools:ignore="ExportedReceiver">
+            <intent-filter>
+                <action android:name="keepass2android.ACTION_TRIGGER_REQUEST_ACCESS" />
+                <action android:name="keepass2android.ACTION_RECEIVE_ACCESS" />
+                <action android:name="keepass2android.ACTION_REVOKE_ACCESS" />
+            </intent-filter>
+        </receiver>
     </application>
 </manifest>

app/src/main/java/net/helcel/fidelity/pluginSDK/AccessManager.kt

@@ -0,0 +1,89 @@
+package net.helcel.fidelity.pluginSDK
+
+import android.content.Context
+import android.content.SharedPreferences
+import androidx.core.content.edit
+import org.json.JSONArray
+import org.json.JSONException
+
+
+object AccessManager {
+    private const val PREF_KEY_SCOPE = "scope"
+    private const val PREF_KEY_TOKEN = "token"
+    private const val PREF_HOSTS = "KP2A.PluginAccess.hosts"
+
+    private fun stringArrayToString(values: ArrayList<String?>): String? {
+        if (values.isEmpty()) return null
+        val a = JSONArray()
+        values.forEach { a.put(it) }
+        return a.toString()
+    }
+
+    private fun stringToStringArray(s: String?): ArrayList<String> {
+        val strings = ArrayList<String>()
+        if (s.isNullOrEmpty()) return strings
+
+        try {
+            val a = JSONArray(s)
+            for (i in 0 until a.length())
+                strings.add(a.optString(i))
+        } catch (e: JSONException) {
+            e.printStackTrace()
+        }
+        return strings
+    }
+
+    fun storeAccessToken(
+        ctx: Context,
+        hostPackage: String?,
+        accessToken: String?,
+        scopes: ArrayList<String?>
+    ) {
+        getPrefsForHost(ctx, hostPackage).edit {
+            putString(PREF_KEY_TOKEN, accessToken)
+            putString(PREF_KEY_SCOPE, stringArrayToString(scopes))
+        }
+
+        val hostPrefs = ctx.getSharedPreferences(PREF_HOSTS, Context.MODE_PRIVATE)
+        if (!hostPrefs.contains(hostPackage))
+            hostPrefs.edit { putString(hostPackage, "") }
+    }
+
+    private fun getPrefsForHost(
+        ctx: Context,
+        hostPackage: String?
+    ): SharedPreferences {
+        return ctx.getSharedPreferences("KP2A.PluginAccess.$hostPackage", Context.MODE_PRIVATE)
+    }
+
+    fun tryGetAccessToken(ctx: Context, hostPackage: String?, scopes: ArrayList<String?>): String? {
+        if (hostPackage.isNullOrEmpty()) return null
+
+        val prefs = getPrefsForHost(ctx, hostPackage)
+        val scopesString = prefs.getString(PREF_KEY_SCOPE, "")
+        val currentScope = stringToStringArray(scopesString)
+        if (!isSubset(scopes, currentScope))
+            return null
+        return prefs.getString(PREF_KEY_TOKEN, null)
+    }
+
+    private fun isSubset(
+        requiredScopes: ArrayList<String?>,
+        availableScopes: ArrayList<String>
+    ): Boolean {
+        return availableScopes.containsAll(requiredScopes)
+    }
+
+    fun removeAccessToken(
+        ctx: Context, hostPackage: String?,
+        accessToken: String?
+    ) {
+        val prefs = getPrefsForHost(ctx, hostPackage)
+        if (prefs.getString(PREF_KEY_TOKEN, "") == accessToken)
+            prefs.edit { clear() }
+
+        val hostPrefs = ctx.getSharedPreferences(PREF_HOSTS, Context.MODE_PRIVATE)
+        if (hostPrefs.contains(hostPackage))
+            hostPrefs.edit { remove(hostPackage) }
+    }
+}

app/src/main/java/net/helcel/fidelity/pluginSDK/KeepassDef.kt

@@ -0,0 +1,9 @@
+package net.helcel.fidelity.pluginSDK
+
+@Suppress("unused")
+object KeepassDef {
+    var TitleField: String = "Title"
+    var UserNameField: String = "UserName"
+    var PasswordField: String = "Password"
+    var UrlField: String = "URL"
+}

app/src/main/java/net/helcel/fidelity/pluginSDK/Kp2aControl.kt

@@ -0,0 +1,49 @@
+package net.helcel.fidelity.pluginSDK
+
+import android.content.Intent
+import org.json.JSONException
+import org.json.JSONObject
+
+object Kp2aControl {
+
+    fun getAddEntryIntent(
+        fields: HashMap<String, String>,
+        protectedFields: ArrayList<String>?
+    ): Intent {
+        val outputData = JSONObject((fields as Map<*, *>)).toString()
+        val startKp2aIntent = Intent(Strings.ACTION_START_WITH_TASK)
+        startKp2aIntent.addCategory(Intent.CATEGORY_DEFAULT)
+        startKp2aIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK)
+        startKp2aIntent.putExtra("KP2A_APPTASK", "CreateEntryThenCloseTask")
+        startKp2aIntent.putExtra("ShowUserNotifications", "true")
+        startKp2aIntent.putExtra(Strings.EXTRA_ENTRY_OUTPUT_DATA, outputData)
+        if (protectedFields != null)
+            startKp2aIntent.putStringArrayListExtra(
+                Strings.EXTRA_PROTECTED_FIELDS_LIST,
+                protectedFields
+            )
+        return startKp2aIntent
+    }
+
+    fun getQueryEntryForOwnPackageIntent(): Intent {
+        return Intent(Strings.ACTION_QUERY_CREDENTIALS_FOR_OWN_PACKAGE)
+    }
+
+    fun getEntryFieldsFromIntent(intent: Intent?): HashMap<String, String> {
+        val res = HashMap<String, String>()
+        try {
+            val json = JSONObject(intent?.getStringExtra(Strings.EXTRA_ENTRY_OUTPUT_DATA) ?: "")
+            val itr = json.keys()
+            while (itr.hasNext()) {
+                val key = itr.next()
+                val value = json[key].toString()
+                res[key] = value
+            }
+        } catch (e: JSONException) {
+            e.printStackTrace()
+        } catch (e: NullPointerException) {
+            e.printStackTrace()
+        }
+        return res
+    }
+}

app/src/main/java/net/helcel/fidelity/pluginSDK/PluginAccessBroadcastReceiver.kt

@@ -0,0 +1,51 @@
+package net.helcel.fidelity.pluginSDK
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+
+class PluginAccessBroadcastReceiver : BroadcastReceiver() {
+    override fun onReceive(ctx: Context, intent: Intent) {
+        val action = intent.action ?: return
+        when (action) {
+            Strings.ACTION_TRIGGER_REQUEST_ACCESS -> requestAccess(ctx, intent)
+            Strings.ACTION_RECEIVE_ACCESS -> receiveAccess(ctx, intent)
+            Strings.ACTION_REVOKE_ACCESS -> revokeAccess(ctx, intent)
+            else -> {}
+        }
+    }
+
+    private fun revokeAccess(ctx: Context, intent: Intent) {
+        val senderPackage = intent.getStringExtra(Strings.EXTRA_SENDER)
+        val accessToken = intent.getStringExtra(Strings.EXTRA_ACCESS_TOKEN)
+        AccessManager.removeAccessToken(ctx, senderPackage, accessToken)
+    }
+
+
+    private fun receiveAccess(ctx: Context, intent: Intent) {
+        val senderPackage = intent.getStringExtra(Strings.EXTRA_SENDER)
+        val accessToken = intent.getStringExtra(Strings.EXTRA_ACCESS_TOKEN)
+        AccessManager.storeAccessToken(ctx, senderPackage, accessToken, scopes)
+    }
+
+    private fun requestAccess(ctx: Context, intent: Intent) {
+        val senderPackage = intent.getStringExtra(Strings.EXTRA_SENDER)
+        val requestToken = intent.getStringExtra(Strings.EXTRA_REQUEST_TOKEN)
+        val rpi = Intent(Strings.ACTION_REQUEST_ACCESS)
+        rpi.setPackage(senderPackage)
+        rpi.putExtra(Strings.EXTRA_SENDER, ctx.packageName)
+        rpi.putExtra(Strings.EXTRA_REQUEST_TOKEN, requestToken)
+
+        val token: String? = AccessManager.tryGetAccessToken(ctx, senderPackage, scopes)
+        rpi.putExtra(Strings.EXTRA_ACCESS_TOKEN, token)
+
+        rpi.putStringArrayListExtra(Strings.EXTRA_SCOPES, scopes)
+        ctx.sendBroadcast(rpi)
+    }
+
+    private val scopes: ArrayList<String?> = ArrayList(
+        listOf(
+            Strings.SCOPE_QUERY_CREDENTIALS_FOR_OWN_PACKAGE,
+        )
+    )
+}

app/src/main/java/net/helcel/fidelity/pluginSDK/Strings.kt

@@ -0,0 +1,32 @@
+package net.helcel.fidelity.pluginSDK
+
+@Suppress("unused")
+object Strings {
+
+    const val SCOPE_DATABASE_ACTIONS = "keepass2android.SCOPE_DATABASE_ACTIONS"
+    const val SCOPE_CURRENT_ENTRY = "keepass2android.SCOPE_CURRENT_ENTRY"
+    const val SCOPE_QUERY_CREDENTIALS_FOR_OWN_PACKAGE =
+        "keepass2android.SCOPE_QUERY_CREDENTIALS_FOR_OWN_PACKAGE"
+    const val SCOPE_QUERY_CREDENTIALS = "keepass2android.SCOPE_QUERY_CREDENTIALS"
+
+    const val EXTRA_SCOPES = "keepass2android.EXTRA_SCOPES"
+    const val EXTRA_PLUGIN_PACKAGE = "keepass2android.EXTRA_PLUGIN_PACKAGE"
+
+    const val EXTRA_SENDER = "keepass2android.EXTRA_SENDER"
+    const val EXTRA_REQUEST_TOKEN = "keepass2android.EXTRA_REQUEST_TOKEN"
+    const val ACTION_START_WITH_TASK = "keepass2android.ACTION_START_WITH_TASK"
+
+    const val ACTION_TRIGGER_REQUEST_ACCESS = "keepass2android.ACTION_TRIGGER_REQUEST_ACCESS"
+    const val ACTION_REQUEST_ACCESS = "keepass2android.ACTION_REQUEST_ACCESS"
+    const val ACTION_RECEIVE_ACCESS = "keepass2android.ACTION_RECEIVE_ACCESS"
+    const val ACTION_REVOKE_ACCESS = "keepass2android.ACTION_REVOKE_ACCESS"
+
+
+    const val EXTRA_ENTRY_OUTPUT_DATA = "keepass2android.EXTRA_ENTRY_OUTPUT_DATA"
+    const val EXTRA_PROTECTED_FIELDS_LIST = "keepass2android.EXTRA_PROTECTED_FIELDS_LIST"
+    const val EXTRA_ACCESS_TOKEN = "keepass2android.EXTRA_ACCESS_TOKEN"
+    const val EXTRA_ENTRY_ID = "keepass2android.EXTRA_ENTRY_ID"
+
+    const val ACTION_QUERY_CREDENTIALS_FOR_OWN_PACKAGE =
+        "keepass2android.ACTION_QUERY_CREDENTIALS_FOR_OWN_PACKAGE"
+}

metadata/en-US/full_description.txt

@@ -1 +1 @@
-<p><i>Keepass-Fidelity</i> adds an interface to view&save barcodes (QR included) with a Keepass Database.</p><p><br></p><ul><li><b>Launcher:</b> view and launch recent entries (a per entry flag can disable this behaviour)</li><li><b>View:</b> view entries from loaded from the database</li><li><b>Create:</b> add entries from the camera, an image of by filling out a form. The entry is then created in the database</li><li><b>Data:</b> the app uses the following data Title (entry name), barcode type (QR, UPC, ...), barcode content (number/text content) and a "secure" flag (enable/disable caching the entry).</li></ul>
+<p><i>Keepass-Fidelity</i> adds an interface to view&save barcodes (QR included) with a Keepass Database, either by opening a KDBX file directly (standalone) or through the Keepass2Android plugin interface.</p><p><br></p><ul><li><b>Launcher:</b> view and launch recent entries (a per entry flag can disable this behaviour)</li><li><b>View:</b> view entries from loaded from the database</li><li><b>Create:</b> add entries from the camera, an image of by filling out a form. The entry is then created in the database</li><li><b>Data:</b> the app uses the following data Title (entry name), barcode type (QR, UPC, ...), barcode content (number/text content) and a "secure" flag (enable/disable caching the entry).</li></ul>