Modular build

app/build.gradle

@@ -1,6 +1,11 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 
+ext {
+    enableCryFS = true
+    enableGocryptfs = true
+}
+
 android {
     compileSdkVersion 31
     buildToolsVersion "31"
@@ -21,6 +26,16 @@ android {
         ndk {
             abiFilters "x86", "x86_64", "armeabi-v7a", "arm64-v8a"
         }
+
+        externalNativeBuild.cmake {
+            targets "mux"
+            if (project.ext.enableGocryptfs) {
+                targets += "gocryptfs_jni"
+            }
+            if (project.ext.enableCryFS) {
+                targets += "cryfs_jni"
+            }
+        }
     }
 
     if (!file("fdroid").exists()) {
@@ -34,6 +49,8 @@ android {
 
     applicationVariants.all { variant ->
         variant.resValue "string", "versionName", variant.versionName
+        buildConfigField "boolean", "CRYFS_ENABLED", "${project.ext.enableCryFS}"
+        buildConfigField "boolean", "GOCRYPTFS_ENABLED", "${project.ext.enableGocryptfs}"
     }
 
     buildFeatures {

app/libcryfs

@@ -1 +1 @@
-Subproject commit 6cd6d9ef5d2f3f41581fbac5d3eb413364714dcf
+Subproject commit fb593c468c62c2f92b0420e80e1f77c001dd3a24

app/src/main/java/sushi/hardcore/droidfs/ChangePasswordActivity.kt

@@ -9,6 +9,7 @@ import android.view.View
 import android.widget.Toast
 import androidx.lifecycle.lifecycleScope
 import sushi.hardcore.droidfs.databinding.ActivityChangePasswordBinding
+import sushi.hardcore.droidfs.filesystems.GocryptfsVolume
 import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
 import java.util.*
 

app/src/main/java/sushi/hardcore/droidfs/ConstValues.kt

@@ -11,6 +11,7 @@ object ConstValues {
     val FAKE_URI: Uri = Uri.parse("fakeuri://droidfs")
     const val MAX_KERNEL_WRITE = 128*1024
     const val WIPE_PASSES = 2
+    const val IO_BUFF_SIZE = 16384
     const val SLIDESHOW_DELAY: Long = 4000
     const val DEFAULT_THEME_VALUE = "dark_green"
     const val THUMBNAIL_MAX_SIZE_KEY = "thumbnail_max_size"

app/src/main/java/sushi/hardcore/droidfs/MainActivity.kt

@@ -31,13 +31,12 @@ import sushi.hardcore.droidfs.explorers.ExplorerActivityDrop
 import sushi.hardcore.droidfs.explorers.ExplorerActivityPick
 import sushi.hardcore.droidfs.file_operations.FileOperationService
 import sushi.hardcore.droidfs.filesystems.EncryptedVolume
+import sushi.hardcore.droidfs.filesystems.GocryptfsVolume
 import sushi.hardcore.droidfs.util.PathUtils
 import sushi.hardcore.droidfs.util.WidgetUtil
 import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
 import sushi.hardcore.droidfs.widgets.EditTextDialog
 import java.io.File
-import java.nio.CharBuffer
-import java.nio.charset.StandardCharsets
 import java.util.*
 
 class MainActivity : BaseActivity(), VolumeAdapter.Listener {
@@ -346,6 +345,7 @@ class MainActivity : BaseActivity(), VolumeAdapter.Listener {
         menu.findItem(R.id.change_password).isVisible =
             onlyOneAndWriteable &&
             // Only gocryptfs volumes support password change
+            BuildConfig.GOCRYPTFS_ENABLED &&
             volumeAdapter.volumes[volumeAdapter.selectedItems.first()].type == EncryptedVolume.GOCRYPTFS_VOLUME_TYPE
         menu.findItem(R.id.remove_default_open).isVisible =
             onlyOneSelected &&
@@ -461,6 +461,13 @@ class MainActivity : BaseActivity(), VolumeAdapter.Listener {
 
     @SuppressLint("NewApi") // fingerprintProtector is non-null only when SDK_INT >= 23
     private fun openVolume(volume: SavedVolume, position: Int) {
+        if (volume.type == EncryptedVolume.GOCRYPTFS_VOLUME_TYPE && !BuildConfig.GOCRYPTFS_ENABLED) {
+            Toast.makeText(this, R.string.gocryptfs_disabled, Toast.LENGTH_SHORT).show()
+            return
+        } else if (volume.type == EncryptedVolume.CRYFS_VOLUME_TYPE && !BuildConfig.CRYFS_ENABLED) {
+            Toast.makeText(this, R.string.cryfs_disabled, Toast.LENGTH_SHORT).show()
+            return
+        }
         var askForPassword = true
         fingerprintProtector?.let { fingerprintProtector ->
             volume.encryptedHash?.let { encryptedHash ->
@@ -646,11 +653,8 @@ class MainActivity : BaseActivity(), VolumeAdapter.Listener {
         if (pickMode && !usfKeepOpen) {
             finish()
             if (shouldCloseVolume) {
-                val sessionID = intent.getIntExtra("sessionID", -1)
+                intent.getParcelableExtra<EncryptedVolume>("volume")?.close()
-                if (sessionID != -1) {
+                RestrictedFileProvider.wipeAll(this)
-                    GocryptfsVolume(sessionID).close()
-                    RestrictedFileProvider.wipeAll(this)
-                }
             }
         }
     }

app/src/main/java/sushi/hardcore/droidfs/add_volume/CreateVolumeFragment.kt

@@ -17,10 +17,12 @@ import sushi.hardcore.droidfs.*
 import sushi.hardcore.droidfs.databinding.FragmentCreateVolumeBinding
 import sushi.hardcore.droidfs.filesystems.CryfsVolume
 import sushi.hardcore.droidfs.filesystems.EncryptedVolume
+import sushi.hardcore.droidfs.filesystems.GocryptfsVolume
 import sushi.hardcore.droidfs.util.WidgetUtil
 import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
 import java.io.File
 import java.util.*
+import kotlin.collections.ArrayList
 
 class CreateVolumeFragment: Fragment() {
     companion object {
@@ -51,6 +53,7 @@ class CreateVolumeFragment: Fragment() {
 
     private lateinit var binding: FragmentCreateVolumeBinding
     private var themeValue = ConstValues.DEFAULT_THEME_VALUE
+    private val volumeTypes = ArrayList<String>(2)
     private lateinit var volumePath: String
     private var isHiddenVolume: Boolean = false
     private var usfFingerprint: Boolean = false
@@ -82,10 +85,16 @@ class CreateVolumeFragment: Fragment() {
         if (!usfFingerprint || fingerprintProtector == null) {
             binding.checkboxSavePassword.visibility = View.GONE
         }
+        if (BuildConfig.GOCRYPTFS_ENABLED) {
+            volumeTypes.add(resources.getString(R.string.gocryptfs))
+        }
+        if (BuildConfig.CRYFS_ENABLED) {
+            volumeTypes.add(resources.getString(R.string.cryfs))
+        }
         binding.spinnerVolumeType.adapter = ArrayAdapter(
             requireContext(),
             android.R.layout.simple_spinner_item,
-            resources.getStringArray(R.array.volume_types)
+            volumeTypes
         ).apply {
             setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
         }
@@ -98,8 +107,10 @@ class CreateVolumeFragment: Fragment() {
         }
         binding.spinnerVolumeType.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
             override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
-                val ciphersArray = if (position == 0) { // Gocryptfs
+                val ciphersArray = if (volumeTypes[position] == resources.getString(R.string.gocryptfs)) {
-                    binding.checkboxSavePassword.visibility = View.VISIBLE
+                    if (usfFingerprint && fingerprintProtector != null) {
+                        binding.checkboxSavePassword.visibility = View.VISIBLE
+                    }
                     R.array.gocryptfs_encryption_ciphers
                 } else {
                     binding.checkboxSavePassword.visibility = View.GONE
@@ -164,7 +175,7 @@ class CreateVolumeFragment: Fragment() {
                     val volumeFile = File(volumePath)
                     if (!volumeFile.exists())
                         volumeFile.mkdirs()
-                    val volume = if (binding.spinnerVolumeType.selectedItem == 0) { // Gocryptfs
+                    val volume = if (volumeTypes[binding.spinnerVolumeType.selectedItemPosition] == resources.getString(R.string.gocryptfs)) {
                         val xchacha = when (binding.spinnerCipher.selectedItemPosition) {
                             0 -> 0
                             1 -> 1

app/src/main/java/sushi/hardcore/droidfs/explorers/BaseExplorerActivity.kt

@@ -32,7 +32,6 @@ import sushi.hardcore.droidfs.ConstValues.isImage
 import sushi.hardcore.droidfs.ConstValues.isPDF
 import sushi.hardcore.droidfs.ConstValues.isText
 import sushi.hardcore.droidfs.ConstValues.isVideo
-import sushi.hardcore.droidfs.GocryptfsVolume
 import sushi.hardcore.droidfs.R
 import sushi.hardcore.droidfs.adapters.ExplorerElementAdapter
 import sushi.hardcore.droidfs.adapters.OpenAsDialogAdapter

app/src/main/java/sushi/hardcore/droidfs/explorers/ExplorerActivity.kt

@@ -3,7 +3,6 @@ package sushi.hardcore.droidfs.explorers
 import android.app.Activity
 import android.content.Intent
 import android.net.Uri
-import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import android.widget.Toast
@@ -12,7 +11,6 @@ import androidx.documentfile.provider.DocumentFile
 import androidx.lifecycle.lifecycleScope
 import kotlinx.coroutines.launch
 import sushi.hardcore.droidfs.CameraActivity
-import sushi.hardcore.droidfs.GocryptfsVolume
 import sushi.hardcore.droidfs.MainActivity
 import sushi.hardcore.droidfs.R
 import sushi.hardcore.droidfs.adapters.IconTextDialogAdapter
@@ -24,7 +22,6 @@ import sushi.hardcore.droidfs.filesystems.Stat
 import sushi.hardcore.droidfs.util.PathUtils
 import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
 import sushi.hardcore.droidfs.widgets.EditTextDialog
-import java.io.File
 
 class ExplorerActivity : BaseExplorerActivity() {
     companion object {

app/src/main/java/sushi/hardcore/droidfs/explorers/ExplorerActivityPick.kt

@@ -2,14 +2,11 @@ package sushi.hardcore.droidfs.explorers
 
 import android.app.Activity
 import android.content.Intent
-import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import sushi.hardcore.droidfs.R
-import sushi.hardcore.droidfs.GocryptfsVolume
 import sushi.hardcore.droidfs.filesystems.EncryptedVolume
 import sushi.hardcore.droidfs.util.PathUtils
-import java.util.*
 
 class ExplorerActivityPick : BaseExplorerActivity() {
     private var resultIntent = Intent()

app/src/main/java/sushi/hardcore/droidfs/file_operations/FileOperationService.kt

@@ -14,7 +14,7 @@ import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.documentfile.provider.DocumentFile
 import kotlinx.coroutines.*
-import sushi.hardcore.droidfs.GocryptfsVolume
+import sushi.hardcore.droidfs.ConstValues
 import sushi.hardcore.droidfs.R
 import sushi.hardcore.droidfs.explorers.ExplorerElement
 import sushi.hardcore.droidfs.filesystems.EncryptedVolume
@@ -129,7 +129,7 @@ class FileOperationService : Service() {
             val dstFileHandle = encryptedVolume.openFile(dstPath)
             if (dstFileHandle != -1L) {
                 var offset: Long = 0
-                val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
+                val ioBuffer = ByteArray(ConstValues.IO_BUFF_SIZE)
                 var length: Int
                 while (remoteEncryptedVolume.read(srcFileHandle, ioBuffer, offset).also { length = it } > 0) {
                     val written = encryptedVolume.write(dstFileHandle, offset, ioBuffer, length).toLong()

app/src/main/java/sushi/hardcore/droidfs/file_viewers/FileViewerActivity.kt

@@ -6,7 +6,6 @@ import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
 import sushi.hardcore.droidfs.BaseActivity
 import sushi.hardcore.droidfs.ConstValues
-import sushi.hardcore.droidfs.GocryptfsVolume
 import sushi.hardcore.droidfs.R
 import sushi.hardcore.droidfs.content_providers.RestrictedFileProvider
 import sushi.hardcore.droidfs.explorers.ExplorerElement

app/src/main/java/sushi/hardcore/droidfs/file_viewers/TextEditor.kt

@@ -3,12 +3,11 @@ package sushi.hardcore.droidfs.file_viewers
 import android.annotation.SuppressLint
 import android.text.Editable
 import android.text.TextWatcher
-import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import android.widget.EditText
 import android.widget.Toast
-import sushi.hardcore.droidfs.GocryptfsVolume
+import sushi.hardcore.droidfs.ConstValues
 import sushi.hardcore.droidfs.R
 import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
 import java.io.ByteArrayInputStream
@@ -73,7 +72,7 @@ class TextEditor: FileViewerActivity() {
         if (fileHandle != -1L) {
             val buff = ByteArrayInputStream(content)
             var offset: Long = 0
-            val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
+            val ioBuffer = ByteArray(ConstValues.IO_BUFF_SIZE)
             var length: Int
             while (buff.read(ioBuffer).also { length = it } > 0) {
                 val written = encryptedVolume.write(fileHandle, offset, ioBuffer, length).toLong()

app/src/main/java/sushi/hardcore/droidfs/filesystems/CryfsVolume.kt

@@ -1,7 +1,6 @@
 package sushi.hardcore.droidfs.filesystems
 
 import android.os.Parcel
-import android.util.Log
 import sushi.hardcore.droidfs.ConstValues
 import sushi.hardcore.droidfs.explorers.ExplorerElement
 import sushi.hardcore.droidfs.util.PathUtils

app/src/main/java/sushi/hardcore/droidfs/filesystems/EncryptedVolume.kt

@@ -5,7 +5,6 @@ import android.net.Uri
 import android.os.Parcel
 import android.os.Parcelable
 import sushi.hardcore.droidfs.ConstValues
-import sushi.hardcore.droidfs.GocryptfsVolume
 import sushi.hardcore.droidfs.SavedVolume
 import sushi.hardcore.droidfs.explorers.ExplorerElement
 import sushi.hardcore.droidfs.util.PathUtils
@@ -80,7 +79,7 @@ abstract class EncryptedVolume: Parcelable {
 
     fun exportFile(fileHandle: Long, os: OutputStream): Boolean {
         var offset: Long = 0
-        val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
+        val ioBuffer = ByteArray(ConstValues.IO_BUFF_SIZE)
         var length: Int
         while (read(fileHandle, ioBuffer, offset).also { length = it } > 0){
             os.write(ioBuffer, 0, length)
@@ -117,7 +116,7 @@ abstract class EncryptedVolume: Parcelable {
         if (dstfileHandle != -1L) {
             var success = true
             var offset: Long = 0
-            val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
+            val ioBuffer = ByteArray(ConstValues.IO_BUFF_SIZE)
             var length: Int
             while (inputStream.read(ioBuffer).also { length = it } > 0) {
                 val written = write(dstfileHandle, offset, ioBuffer, length).toLong()
@@ -159,7 +158,7 @@ abstract class EncryptedVolume: Parcelable {
                     Pair(null, 3)
                 } else {
                     var offset: Long = 0
-                    val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
+                    val ioBuffer = ByteArray(ConstValues.IO_BUFF_SIZE)
                     var length: Int
                     while (read(fileHandle, ioBuffer, offset).also { length = it } > 0) {
                         System.arraycopy(ioBuffer, 0, fileBuff, offset.toInt(), length)

app/src/main/java/sushi/hardcore/droidfs/filesystems/GocryptfsVolume.kt

@@ -1,14 +1,12 @@
-package sushi.hardcore.droidfs
+package sushi.hardcore.droidfs.filesystems
 
 import android.os.Parcel
 import sushi.hardcore.droidfs.explorers.ExplorerElement
-import sushi.hardcore.droidfs.filesystems.EncryptedVolume
-import sushi.hardcore.droidfs.filesystems.Stat
 
 class GocryptfsVolume(private val sessionID: Int): EncryptedVolume() {
     private external fun native_close(sessionID: Int)
     private external fun native_is_closed(sessionID: Int): Boolean
-    private external fun native_list_dir(sessionID: Int, dir_path: String): MutableList<ExplorerElement>
+    private external fun native_list_dir(sessionID: Int, dir_path: String): MutableList<ExplorerElement>?
     private external fun native_open_read_mode(sessionID: Int, file_path: String): Int
     private external fun native_open_write_mode(sessionID: Int, file_path: String, mode: Int): Int
     private external fun native_read_file(sessionID: Int, handleID: Int, offset: Long, buff: ByteArray): Int
@@ -24,7 +22,6 @@ class GocryptfsVolume(private val sessionID: Int): EncryptedVolume() {
     companion object {
         const val KeyLen = 32
         const val ScryptDefaultLogN = 16
-        const val DefaultBS = 4096
         const val CONFIG_FILE_NAME = "gocryptfs.conf"
         external fun createVolume(root_cipher_dir: String, password: ByteArray, plainTextNames: Boolean, xchacha: Int, logN: Int, creator: String, returnedHash: ByteArray?): Boolean
         private external fun nativeInit(root_cipher_dir: String, password: ByteArray?, givenHash: ByteArray?, returnedHash: ByteArray?): Int

app/src/main/native/gocryptfs_jni.c

@@ -30,7 +30,7 @@ void jbyteArray_to_unsignedCharArray(const jbyte* src, unsigned char* dst, const
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_00024Companion_createVolume(JNIEnv *env, jclass clazz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_00024Companion_createVolume(JNIEnv *env, jclass clazz,
                                                                              jstring jroot_cipher_dir,
                                                                              jbyteArray jpassword,
                                                                              jboolean plainTextNames,
@@ -77,7 +77,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_00024Companion_createVolume(JNIEnv *
 }
 
 JNIEXPORT jint JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_00024Companion_nativeInit(JNIEnv *env, jobject clazz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_00024Companion_nativeInit(JNIEnv *env, jobject clazz,
                                                       jstring jroot_cipher_dir,
                                                       jbyteArray jpassword,
                                                       jbyteArray jgiven_hash,
@@ -145,13 +145,13 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_00024Companion_nativeInit(JNIEnv *en
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1is_1closed(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1is_1closed(JNIEnv *env, jobject thiz,
                                                                     jint sessionID) {
     return gcf_is_closed(sessionID);
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_00024Companion_changePassword(JNIEnv *env, jclass clazz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_00024Companion_changePassword(JNIEnv *env, jclass clazz,
                                                                                jstring jroot_cipher_dir,
                                                                                jcharArray jold_password,
                                                                                jbyteArray jgiven_hash,
@@ -220,6 +220,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_00024Companion_changePassword(JNIEnv
     }
 
     wipe(new_password, new_password_len);
+    free(new_password);
     (*env)->ReleaseCharArrayElements(env, jnew_password, jchar_new_password, 0);
 
     if (!(*env)->IsSameObject(env, jreturned_hash, NULL)) {
@@ -233,12 +234,12 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_00024Companion_changePassword(JNIEnv
 }
 
 JNIEXPORT void JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1close(JNIEnv *env, jobject thiz, jint sessionID) {
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1close(JNIEnv *env, jobject thiz, jint sessionID) {
     gcf_close(sessionID);
 }
 
 JNIEXPORT jobject JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1list_1dir(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1list_1dir(JNIEnv *env, jobject thiz,
                                                           jint sessionID, jstring jplain_dir) {
     const char* plain_dir = (*env)->GetStringUTFChars(env, jplain_dir, NULL);
     const size_t plain_dir_len = strlen(plain_dir);
@@ -246,55 +247,59 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1list_1dir(JNIEnv *env, jobje
 
     struct gcf_list_dir_return elements = gcf_list_dir(sessionID, go_plain_dir);
 
-    jclass java_ArrayList = (*env)->NewLocalRef(env, (*env)->FindClass(env, "java/util/ArrayList"));
+    jobject elementList = NULL;
-    jmethodID java_ArrayList_init = (*env)->GetMethodID(env, java_ArrayList, "<init>", "(I)V");
+    if (elements.r0 != NULL) {
-    jmethodID java_ArrayList_add = (*env)->GetMethodID(env, java_ArrayList, "add", "(Ljava/lang/Object;)Z");
+        jclass arrayList = (*env)->NewLocalRef(env, (*env)->FindClass(env, "java/util/ArrayList"));
+        jmethodID arrayListInit = (*env)->GetMethodID(env, arrayList, "<init>", "(I)V");
+        jmethodID arrayListAdd = (*env)->GetMethodID(env, arrayList, "add", "(Ljava/lang/Object;)Z");
+        jclass classExplorerElement = (*env)->NewLocalRef(env, (*env)->FindClass(env, "sushi/hardcore/droidfs/explorers/ExplorerElement"));
+        jmethodID explorerElementNew = (*env)->GetStaticMethodID(env, classExplorerElement, "new", "(Ljava/lang/String;IJJLjava/lang/String;)Lsushi/hardcore/droidfs/explorers/ExplorerElement;");
+        elementList = (*env)->NewObject(env, arrayList, arrayListInit, elements.r2);
 
-    jclass classExplorerElement = (*env)->NewLocalRef(env, (*env)->FindClass(env, "sushi/hardcore/droidfs/explorers/ExplorerElement"));
+        unsigned int c = 0;
-    jmethodID explorerElement_new = (*env)->GetStaticMethodID(env, classExplorerElement, "new", "(Ljava/lang/String;IJJLjava/lang/String;)Lsushi/hardcore/droidfs/explorers/ExplorerElement;");
+        for (unsigned int i=0; i<elements.r2; ++i){
-    jobject element_list = (*env)->NewObject(env, java_ArrayList, java_ArrayList_init, elements.r2);
+            const char* name = &(elements.r0[c]);
-    unsigned int c = 0;
+            size_t nameLen = strlen(name);
-    for (unsigned int i=0; i<elements.r2; ++i){
-        const char* name = &(elements.r0[c]);
-        size_t name_len = strlen(name);
 
-        const char gcf_full_path[plain_dir_len+name_len+2];
+            char* fullPath = malloc(sizeof(char) * (plain_dir_len + nameLen + 2));
-        strcpy(gcf_full_path, plain_dir);
+            strcpy(fullPath, plain_dir);
-        if (plain_dir[-2] != '/') {
+            if (plain_dir[-2] != '/') {
-            strcat(gcf_full_path, "/");
+                strcat(fullPath, "/");
+            }
+            strcat(fullPath, name);
+
+            GoString go_name = {fullPath, strlen(fullPath)};
+            struct gcf_get_attrs_return attrs = gcf_get_attrs(sessionID, go_name);
+            free(fullPath);
+
+            jstring jname = (*env)->NewStringUTF(env, name);
+            jobject explorerElement = (*env)->CallStaticObjectMethod(
+                    env,
+                    classExplorerElement,
+                    explorerElementNew,
+                    jname,
+                    elements.r1[i],
+                    (long long) attrs.r1,
+                    (long long) attrs.r2,
+                    jplain_dir
+            );
+            (*env)->CallBooleanMethod(env, elementList, arrayListAdd, explorerElement);
+            (*env)->DeleteLocalRef(env, explorerElement);
+            (*env)->DeleteLocalRef(env, jname);
+            c += nameLen + 1;
         }
-        strcat(gcf_full_path, name);
 
-        GoString go_name = {gcf_full_path, strlen(gcf_full_path)};
+        free(elements.r0);
-        struct gcf_get_attrs_return attrs = gcf_get_attrs(sessionID, go_name);
+        free(elements.r1);
-
-        jstring jname = (*env)->NewStringUTF(env, name);
-        jobject explorerElement = (*env)->CallStaticObjectMethod(
-                env,
-                classExplorerElement,
-                explorerElement_new,
-                jname,
-                elements.r1[i],
-                (long long) attrs.r1,
-                attrs.r2,
-                jplain_dir
-        );
-        (*env)->CallBooleanMethod(env, element_list, java_ArrayList_add, explorerElement);
-        (*env)->DeleteLocalRef(env, explorerElement);
-        (*env)->DeleteLocalRef(env, jname);
-        c += name_len+1;
     }
 
-    free(elements.r0);
-    free(elements.r1);
-
     (*env)->ReleaseStringUTFChars(env, jplain_dir, plain_dir);
 
-    return element_list;
+    return elementList;
 }
 
 JNIEXPORT jobject JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1get_1attr(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1get_1attr(JNIEnv *env, jobject thiz,
                                                               jint sessionID, jstring jfile_path) {
     const char* file_path = (*env)->GetStringUTFChars(env, jfile_path, NULL);
     GoString go_file_path = {file_path, strlen(file_path)};
@@ -318,7 +323,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1get_1attr(JNIEnv *env, jobje
 }
 
 JNIEXPORT jint JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1open_1read_1mode(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1open_1read_1mode(JNIEnv *env, jobject thiz,
                                                                          jint sessionID,
                                                                          jstring jfile_path) {
     const char* file_path = (*env)->GetStringUTFChars(env, jfile_path, NULL);
@@ -332,7 +337,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1open_1read_1mode(JNIEnv *env
 }
 
 JNIEXPORT jint JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1open_1write_1mode(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1open_1write_1mode(JNIEnv *env, jobject thiz,
                                                                           jint sessionID,
                                                                           jstring jfile_path,
                                                                           jint mode) {
@@ -347,7 +352,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1open_1write_1mode(JNIEnv *en
 }
 
 JNIEXPORT jint JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1write_1file(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1write_1file(JNIEnv *env, jobject thiz,
                                                             jint sessionID, jint handleID, jlong offset,
                                                             jbyteArray jbuff, jint buff_size) {
     jbyte* buff = (*env)->GetByteArrayElements(env, jbuff, NULL);
@@ -361,24 +366,24 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1write_1file(JNIEnv *env, job
 }
 
 JNIEXPORT jint JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1read_1file(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1read_1file(JNIEnv *env, jobject thiz,
                                                            jint sessionID, jint handleID, jlong offset,
                                                             jbyteArray jbuff) {
     const size_t buff_size = (*env)->GetArrayLength(env, jbuff);
-    unsigned char buff[buff_size];
+    unsigned char* buff = malloc(sizeof(char)*buff_size);
     GoSlice go_buff = {buff, buff_size, buff_size};
 
     int read = gcf_read_file(sessionID, handleID, offset, go_buff);
 
     if (read > 0){
-        (*env)->SetByteArrayRegion(env, jbuff, 0, read, buff);
+        (*env)->SetByteArrayRegion(env, jbuff, 0, read, (const jbyte*)buff);
     }
-
+    free(buff);
     return read;
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1truncate(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1truncate(JNIEnv *env, jobject thiz,
                                                                   jint sessionID,
                                                                   jstring jpath,
                                                                   jlong offset) {
@@ -392,14 +397,14 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1truncate(JNIEnv *env, jobjec
 }
 
 JNIEXPORT void JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1close_1file(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1close_1file(JNIEnv *env, jobject thiz,
                                                                          jint sessionID,
                                                                          jint handleID) {
     gcf_close_file(sessionID, handleID);
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1remove_1file(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1remove_1file(JNIEnv *env, jobject thiz,
                                                                      jint sessionID, jstring jfile_path) {
     const char* file_path = (*env)->GetStringUTFChars(env, jfile_path, NULL);
     GoString go_file_path = {file_path, strlen(file_path)};
@@ -412,7 +417,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1remove_1file(JNIEnv *env, jo
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1mkdir(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1mkdir(JNIEnv *env, jobject thiz,
                                                       jint sessionID, jstring jdir_path, jint mode) {
     const char* dir_path = (*env)->GetStringUTFChars(env, jdir_path, NULL);
     GoString go_dir_path = {dir_path, strlen(dir_path)};
@@ -425,7 +430,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1mkdir(JNIEnv *env, jobject t
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1rmdir(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1rmdir(JNIEnv *env, jobject thiz,
                                                       jint sessionID, jstring jdir_path) {
     const char* dir_path = (*env)->GetStringUTFChars(env, jdir_path, NULL);
     GoString go_dir_path = {dir_path, strlen(dir_path)};
@@ -438,7 +443,7 @@ Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1rmdir(JNIEnv *env, jobject t
 }
 
 JNIEXPORT jboolean JNICALL
-Java_sushi_hardcore_droidfs_GocryptfsVolume_native_1rename(JNIEnv *env, jobject thiz,
+Java_sushi_hardcore_droidfs_filesystems_GocryptfsVolume_native_1rename(JNIEnv *env, jobject thiz,
                                                                 jint sessionID, jstring jold_path,
                                                                 jstring jnew_path) {
     const char* old_path = (*env)->GetStringUTFChars(env, jold_path, NULL);

app/src/main/res/values/arrays.xml

@@ -1,9 +1,4 @@
 <resources>
-    <string-array name="volume_types">
-        <item>Gocryptfs</item>
-        <item>CryFS</item>
-    </string-array>
-
     <string-array name="gocryptfs_encryption_ciphers">
         <item>AES-GCM</item>
         <item>XChaCha20-Poly1305</item>

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

@@ -242,4 +242,8 @@
     <string name="pin_passwords_title">Numeric keypad layout</string>
     <string name="pin_passwords_summary">Use a numeric keypad layout when entering volume passwords</string>
     <string name="volume_type_label">Volume type:</string>
+    <string name="gocryptfs">Gocryptfs</string>
+    <string name="cryfs">CryFS</string>
+    <string name="gocryptfs_disabled">Gocryptfs support has been disabled</string>
+    <string name="cryfs_disabled">CryFS support has been disabled</string>
 </resources>