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Allow choosing export method

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This commit is contained in:
Matéo Duparc 2024-01-28 15:44:53 +01:00
parent b4635dc2e0
commit 1c15f9fac8
Signed by untrusted user: hardcoresushi
GPG Key ID: AFE384344A45E13A
14 changed files with 138 additions and 64 deletions
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2
README.md
View File

@ -62,7 +62,7 @@ Some available features are considered risky and are therefore disabled by defau
</li>
</ul>
\* These features may require temporarily writing the plain file to disk (DroidFS internal storage). This file can be read by applications with root access or by physical access if your device is not encrypted. For files small enough and on a 3.17+ kernel, DroidFS will try to use memory-only storage using `memfd_create(2)` (can break some apps).
\* These features can work in two ways: temporarily writing the plain file to disk (DroidFS internal storage) or sharing it via memory. By default, DroidFS will choose to keep the file only in memory as it's more secure, but will fallback to disk export if the file is too large to be held in memory. This behavior can be changed with the *"Export method"* parameter in the settings. Please note that some applications require the file to be stored on disk, and therefore do not work with memory-exported files.
# Download
<a href="https://f-droid.org/packages/sushi.hardcore.droidfs">

8
app/src/main/java/sushi/hardcore/droidfs/ChangePasswordActivity.kt
View File

@ -16,7 +16,7 @@ import sushi.hardcore.droidfs.filesystems.EncryptedVolume
import sushi.hardcore.droidfs.filesystems.GocryptfsVolume
import sushi.hardcore.droidfs.util.IntentUtils
import sushi.hardcore.droidfs.util.ObjRef
import sushi.hardcore.droidfs.util.WidgetUtil
import sushi.hardcore.droidfs.util.UIUtils
import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
import java.util.*
@ -89,8 +89,8 @@ class ChangePasswordActivity: BaseActivity() {
}
private fun changeVolumePassword() {
val newPassword = WidgetUtil.encodeEditTextContent(binding.editNewPassword)
val newPasswordConfirm = WidgetUtil.encodeEditTextContent(binding.editPasswordConfirm)
val newPassword = UIUtils.encodeEditTextContent(binding.editNewPassword)
val newPasswordConfirm = UIUtils.encodeEditTextContent(binding.editPasswordConfirm)
@SuppressLint("NewApi")
if (!newPassword.contentEquals(newPasswordConfirm)) {
Toast.makeText(this, R.string.passwords_mismatch, Toast.LENGTH_SHORT).show()
@ -135,7 +135,7 @@ class ChangePasswordActivity: BaseActivity() {
null
}
val currentPassword = if (givenHash == null) {
WidgetUtil.encodeEditTextContent(binding.editCurrentPassword)
UIUtils.encodeEditTextContent(binding.editCurrentPassword)
} else {
null
}

45
app/src/main/java/sushi/hardcore/droidfs/EncryptedFileProvider.kt
View File

@ -7,6 +7,7 @@ import android.os.Handler
import android.os.ParcelFileDescriptor
import android.system.Os
import android.util.Log
import androidx.preference.PreferenceManager
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.launch
import sushi.hardcore.droidfs.filesystems.EncryptedVolume
@ -22,6 +23,23 @@ class EncryptedFileProvider(context: Context) {
companion object {
private const val TAG = "EncryptedFileProvider"
fun getTmpFilesDir(context: Context) = File(context.cacheDir, "tmp")
var exportMethod = ExportMethod.AUTO
}
enum class ExportMethod {
AUTO,
DISK,
MEMORY;
companion object {
fun parse(value: String) = when (value) {
"auto" -> EncryptedFileProvider.ExportMethod.AUTO
"disk" -> EncryptedFileProvider.ExportMethod.DISK
"memory" -> EncryptedFileProvider.ExportMethod.MEMORY
else -> throw IllegalArgumentException("Invalid export method: $value")
}
}
}
private val memoryInfo = ActivityManager.MemoryInfo()
@ -33,6 +51,11 @@ class EncryptedFileProvider(context: Context) {
(context.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager).getMemoryInfo(
memoryInfo
)
PreferenceManager.getDefaultSharedPreferences(context)
.getString("export_method", null)?.let {
exportMethod = ExportMethod.parse(it)
}
}
class ExportedDiskFile private constructor(
@ -118,16 +141,18 @@ class EncryptedFileProvider(context: Context) {
path: String,
size: Long,
): ExportedFile? {
return if (size > memoryInfo.availMem * 0.8) {
ExportedDiskFile.create(
path,
tmpFilesDir,
handler,
)
} else if (isMemFileSupported) {
ExportedMemFile.create(path, size) as ExportedFile
} else {
null
val diskFile by lazy { ExportedDiskFile.create(path, tmpFilesDir, handler) }
val memFile by lazy { ExportedMemFile.create(path, size) }
return when (exportMethod) {
ExportMethod.MEMORY -> memFile
ExportMethod.DISK -> diskFile
ExportMethod.AUTO -> {
if (isMemFileSupported && size < memoryInfo.availMem * 0.8) {
memFile
} else {
diskFile
}
}
}
}

7
app/src/main/java/sushi/hardcore/droidfs/MainActivity.kt
View File

@ -28,6 +28,7 @@ import sushi.hardcore.droidfs.file_operations.FileOperationService
import sushi.hardcore.droidfs.file_operations.TaskResult
import sushi.hardcore.droidfs.util.IntentUtils
import sushi.hardcore.droidfs.util.PathUtils
import sushi.hardcore.droidfs.util.UIUtils
import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
import sushi.hardcore.droidfs.widgets.EditTextDialog
import java.io.File
@ -354,7 +355,11 @@ class MainActivity : BaseActivity(), VolumeAdapter.Listener {
override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.main_activity, menu)
menu.findItem(R.id.settings).isVisible = !explorerRouter.pickMode && !explorerRouter.dropMode
val settingsVisible = !explorerRouter.pickMode && !explorerRouter.dropMode
menu.findItem(R.id.settings).isVisible = settingsVisible
if (settingsVisible) {
UIUtils.getMenuIconNeutralTint(this, menu).applyTo(R.id.settings, R.drawable.icon_settings)
}
val isSelecting = volumeAdapter.selectedItems.isNotEmpty()
menu.findItem(R.id.select_all).isVisible = isSelecting
menu.findItem(R.id.lock).isVisible = isSelecting && volumeAdapter.selectedItems.any {

25
app/src/main/java/sushi/hardcore/droidfs/SettingsActivity.kt
View File

@ -179,17 +179,7 @@ class SettingsActivity : BaseActivity() {
true
}
switchExpose.setOnPreferenceChangeListener { _, checked ->
if (checked as Boolean) {
if (!Compat.isMemFileSupported()) {
CustomAlertDialogBuilder(requireContext(), (requireActivity() as BaseActivity).theme)
.setTitle(R.string.error)
.setMessage("Your current kernel does not support memfd_create(). This feature requires a minimum kernel version of ${Compat.MEMFD_CREATE_MINIMUM_KERNEL_VERSION}.")
.setPositiveButton(R.string.ok, null)
.show()
return@setOnPreferenceChangeListener false
}
}
VolumeProvider.usfExpose = checked
VolumeProvider.usfExpose = checked as Boolean
updateView(usfExpose = checked)
VolumeProvider.notifyRootsChanged(requireContext())
true
@ -199,6 +189,19 @@ class SettingsActivity : BaseActivity() {
TemporaryFileProvider.usfSafWrite = checked
true
}
findPreference<ListPreference>("export_method")!!.setOnPreferenceChangeListener { _, newValue ->
if (newValue as String == "memory" && !Compat.isMemFileSupported()) {
CustomAlertDialogBuilder(requireContext(), (requireActivity() as BaseActivity).theme)
.setTitle(R.string.error)
.setMessage(getString(R.string.memfd_create_unsupported, Compat.MEMFD_CREATE_MINIMUM_KERNEL_VERSION))
.setPositiveButton(R.string.ok, null)
.show()
return@setOnPreferenceChangeListener false
}
EncryptedFileProvider.exportMethod = EncryptedFileProvider.ExportMethod.parse(newValue)
true
}
}
}
}

4
app/src/main/java/sushi/hardcore/droidfs/VolumeOpener.kt
View File

@ -13,7 +13,7 @@ import sushi.hardcore.droidfs.Constants.DEFAULT_VOLUME_KEY
import sushi.hardcore.droidfs.databinding.DialogOpenVolumeBinding
import sushi.hardcore.droidfs.filesystems.EncryptedVolume
import sushi.hardcore.droidfs.util.ObjRef
import sushi.hardcore.droidfs.util.WidgetUtil
import sushi.hardcore.droidfs.util.UIUtils
import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
import java.util.*
@ -123,7 +123,7 @@ class VolumeOpener(
apply()
}
}
val password = WidgetUtil.encodeEditTextContent(dialogBinding!!.editPassword)
val password = UIUtils.encodeEditTextContent(dialogBinding!!.editPassword)
val savePasswordHash = dialogBinding!!.checkboxSavePassword.isChecked
dialogBinding = null
// openVolumeWithPassword is responsible for wiping the password

6
app/src/main/java/sushi/hardcore/droidfs/add_volume/CreateVolumeFragment.kt
View File

@ -20,7 +20,7 @@ import sushi.hardcore.droidfs.filesystems.EncryptedVolume
import sushi.hardcore.droidfs.filesystems.GocryptfsVolume
import sushi.hardcore.droidfs.util.Compat
import sushi.hardcore.droidfs.util.ObjRef
import sushi.hardcore.droidfs.util.WidgetUtil
import sushi.hardcore.droidfs.util.UIUtils
import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
import java.io.File
import java.util.*
@ -146,8 +146,8 @@ class CreateVolumeFragment: Fragment() {
}
private fun createVolume() {
val password = WidgetUtil.encodeEditTextContent(binding.editPassword)
val passwordConfirm = WidgetUtil.encodeEditTextContent(binding.editPasswordConfirm)
val password = UIUtils.encodeEditTextContent(binding.editPassword)
val passwordConfirm = UIUtils.encodeEditTextContent(binding.editPasswordConfirm)
if (!password.contentEquals(passwordConfirm)) {
Toast.makeText(requireContext(), R.string.passwords_mismatch, Toast.LENGTH_SHORT).show()
Arrays.fill(password, 0)

16
app/src/main/java/sushi/hardcore/droidfs/explorers/BaseExplorerActivity.kt
View File

@ -54,6 +54,7 @@ import sushi.hardcore.droidfs.file_viewers.VideoPlayer
import sushi.hardcore.droidfs.filesystems.EncryptedVolume
import sushi.hardcore.droidfs.filesystems.Stat
import sushi.hardcore.droidfs.util.PathUtils
import sushi.hardcore.droidfs.util.UIUtils
import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
import sushi.hardcore.droidfs.widgets.EditTextDialog
@ -564,14 +565,6 @@ open class BaseExplorerActivity : BaseActivity(), ExplorerElementAdapter.Listene
}
}
private fun setMenuIconTint(menu: Menu, iconColor: Int, menuItemId: Int, drawableId: Int) {
menu.findItem(menuItemId)?.let {
it.icon = ContextCompat.getDrawable(this, drawableId)?.apply {
setTint(iconColor)
}
}
}
override fun onCreateOptionsMenu(menu: Menu): Boolean {
menu.findItem(R.id.rename).isVisible = false
menu.findItem(R.id.open_as)?.isVisible = false
@ -579,9 +572,10 @@ open class BaseExplorerActivity : BaseActivity(), ExplorerElementAdapter.Listene
menu.findItem(R.id.external_open)?.isVisible = false
}
val noItemSelected = explorerAdapter.selectedItems.isEmpty()
val iconColor = ContextCompat.getColor(this, R.color.neutralIconTint)
setMenuIconTint(menu, iconColor, R.id.sort, R.drawable.icon_sort)
setMenuIconTint(menu, iconColor, R.id.share, R.drawable.icon_share)
with(UIUtils.getMenuIconNeutralTint(this, menu)) {
applyTo(R.id.sort, R.drawable.icon_sort)
applyTo(R.id.share, R.drawable.icon_share)
}
menu.findItem(R.id.sort).isVisible = noItemSelected
menu.findItem(R.id.lock).isVisible = noItemSelected
menu.findItem(R.id.close).isVisible = noItemSelected

42
app/src/main/java/sushi/hardcore/droidfs/util/UIUtils.kt Normal file
View File

@ -0,0 +1,42 @@
package sushi.hardcore.droidfs.util
import android.content.Context
import android.view.Menu
import android.widget.EditText
import androidx.core.content.ContextCompat
import sushi.hardcore.droidfs.R
import java.nio.CharBuffer
import java.nio.charset.StandardCharsets
import java.util.*
object UIUtils {
fun encodeEditTextContent(editText: EditText): ByteArray {
val charArray = CharArray(editText.text.length)
editText.text.getChars(0, editText.text.length, charArray, 0)
val byteBuffer = StandardCharsets.UTF_8.encode(CharBuffer.wrap(charArray))
Arrays.fill(charArray, Char.MIN_VALUE)
val byteArray = ByteArray(byteBuffer.remaining())
byteBuffer.get(byteArray)
Wiper.wipe(byteBuffer)
return byteArray
}
class MenuIconColor(
private val context: Context,
private val menu: Menu,
private val color: Int
) {
fun applyTo(menuItemId: Int, drawableId: Int) {
menu.findItem(menuItemId)?.let {
it.icon = ContextCompat.getDrawable(context, drawableId)?.apply {
setTint(color)
}
}
}
}
fun getMenuIconNeutralTint(context: Context, menu: Menu) = MenuIconColor(
context, menu,
ContextCompat.getColor(context, R.color.neutralIconTint),
)
}

19
app/src/main/java/sushi/hardcore/droidfs/util/WidgetUtil.kt
View File

@ -1,19 +0,0 @@
package sushi.hardcore.droidfs.util
import android.widget.EditText
import java.nio.CharBuffer
import java.nio.charset.StandardCharsets
import java.util.*
object WidgetUtil {
fun encodeEditTextContent(editText: EditText): ByteArray {
val charArray = CharArray(editText.text.length)
editText.text.getChars(0, editText.text.length, charArray, 0)
val byteBuffer = StandardCharsets.UTF_8.encode(CharBuffer.wrap(charArray))
Arrays.fill(charArray, Char.MIN_VALUE)
val byteArray = ByteArray(byteBuffer.remaining())
byteBuffer.get(byteArray)
Wiper.wipe(byteBuffer)
return byteArray
}
}

4
app/src/main/res/drawable/icon_settings.xml
View File

@ -1,5 +1,5 @@
<vector android:height="24dp" android:tint="#FFFFFF"
<vector android:height="24dp"
android:viewportHeight="24" android:viewportWidth="24"
android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
<path android:fillColor="@android:color/white" android:pathData="M19.14,12.94c0.04,-0.3 0.06,-0.61 0.06,-0.94c0,-0.32 -0.02,-0.64 -0.07,-0.94l2.03,-1.58c0.18,-0.14 0.23,-0.41 0.12,-0.61l-1.92,-3.32c-0.12,-0.22 -0.37,-0.29 -0.59,-0.22l-2.39,0.96c-0.5,-0.38 -1.03,-0.7 -1.62,-0.94L14.4,2.81c-0.04,-0.24 -0.24,-0.41 -0.48,-0.41h-3.84c-0.24,0 -0.43,0.17 -0.47,0.41L9.25,5.35C8.66,5.59 8.12,5.92 7.63,6.29L5.24,5.33c-0.22,-0.08 -0.47,0 -0.59,0.22L2.74,8.87C2.62,9.08 2.66,9.34 2.86,9.48l2.03,1.58C4.84,11.36 4.8,11.69 4.8,12s0.02,0.64 0.07,0.94l-2.03,1.58c-0.18,0.14 -0.23,0.41 -0.12,0.61l1.92,3.32c0.12,0.22 0.37,0.29 0.59,0.22l2.39,-0.96c0.5,0.38 1.03,0.7 1.62,0.94l0.36,2.54c0.05,0.24 0.24,0.41 0.48,0.41h3.84c0.24,0 0.44,-0.17 0.47,-0.41l0.36,-2.54c0.59,-0.24 1.13,-0.56 1.62,-0.94l2.39,0.96c0.22,0.08 0.47,0 0.59,-0.22l1.92,-3.32c0.12,-0.22 0.07,-0.47 -0.12,-0.61L19.14,12.94zM12,15.6c-1.98,0 -3.6,-1.62 -3.6,-3.6s1.62,-3.6 3.6,-3.6s3.6,1.62 3.6,3.6S13.98,15.6 12,15.6z"/>
<path android:fillColor="?attr/colorAccent" android:pathData="M19.14,12.94c0.04,-0.3 0.06,-0.61 0.06,-0.94c0,-0.32 -0.02,-0.64 -0.07,-0.94l2.03,-1.58c0.18,-0.14 0.23,-0.41 0.12,-0.61l-1.92,-3.32c-0.12,-0.22 -0.37,-0.29 -0.59,-0.22l-2.39,0.96c-0.5,-0.38 -1.03,-0.7 -1.62,-0.94L14.4,2.81c-0.04,-0.24 -0.24,-0.41 -0.48,-0.41h-3.84c-0.24,0 -0.43,0.17 -0.47,0.41L9.25,5.35C8.66,5.59 8.12,5.92 7.63,6.29L5.24,5.33c-0.22,-0.08 -0.47,0 -0.59,0.22L2.74,8.87C2.62,9.08 2.66,9.34 2.86,9.48l2.03,1.58C4.84,11.36 4.8,11.69 4.8,12s0.02,0.64 0.07,0.94l-2.03,1.58c-0.18,0.14 -0.23,0.41 -0.12,0.61l1.92,3.32c0.12,0.22 0.37,0.29 0.59,0.22l2.39,-0.96c0.5,0.38 1.03,0.7 1.62,0.94l0.36,2.54c0.05,0.24 0.24,0.41 0.48,0.41h3.84c0.24,0 0.44,-0.17 0.47,-0.41l0.36,-2.54c0.59,-0.24 1.13,-0.56 1.62,-0.94l2.39,0.96c0.22,0.08 0.47,0 0.59,-0.22l1.92,-3.32c0.12,-0.22 0.07,-0.47 -0.12,-0.61L19.14,12.94zM12,15.6c-1.98,0 -3.6,-1.62 -3.6,-3.6s1.62,-3.6 3.6,-3.6s3.6,1.62 3.6,3.6S13.98,15.6 12,15.6z"/>
</vector>

12
app/src/main/res/values/arrays.xml
View File

@ -38,6 +38,12 @@
<item>Pink</item>
</string-array>
<string-array name="export_methods">
<item>Auto (depending on available memory)</item>
<item>Temporary export on disk (reliable but may leave traces)</item>
<item>Memory file (safer but doesn\'t always work)</item>
</string-array>
<!-- don't translate the following otherwise the app will crash -->
<string-array name="sort_orders_values">
<item>name</item>
@ -57,4 +63,10 @@
<item>purple</item>
<item>pink</item>
</string-array>
<string-array name="export_methods_values">
<item>auto</item>
<item>disk</item>
<item>memory</item>
</string-array>
</resources>

3
app/src/main/res/values/strings.xml
View File

@ -273,4 +273,7 @@
<string name="export_failed_export">failed to export file</string>
<string name="export_mem">Exporting to memory…</string>
<string name="export_disk">Exporting to disk…</string>
<string name="memfd_create_unsupported">Your current kernel does not support memfd_create(). This feature requires a minimum kernel version of %s.</string>
<string name="export_method">Export method</string>
<string name="export_method_summary">File export method. Used for sharing, external opening and accessing exposed files.</string>
</resources>

9
app/src/main/res/xml/unsafe_features_preferences.xml
View File

@ -78,6 +78,15 @@
android:title="@string/usf_saf_write"
android:summary="@string/usf_saf_write_summary" />
<ListPreference
android:key="export_method"
android:entries="@array/export_methods"
android:entryValues="@array/export_methods_values"
android:defaultValue="auto"
android:title="@string/export_method"
android:summary="@string/export_method_summary"
android:icon="@drawable/icon_settings"/>
</PreferenceCategory>
</PreferenceScreen>