multiplatform: local file encryption (#3043)

* multiplatform: file encryption

* setting

* fixed sharing

* check

* fixes, change lock icon

* update JNI bindings (crashes on desktop)

* fix JNI

* fix errors and warnings

* fix saving

---------

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/AppCommon.desktop.kt

@@ -25,6 +25,8 @@ fun initApp() {
     initChatController()
     runMigrations()
   }
+  // LALAL
+  //testCrypto()
 }
 
 private fun applyAppLocale() {

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/RecAndPlay.desktop.kt

@@ -1,7 +1,7 @@
 package chat.simplex.common.platform
 
 import androidx.compose.runtime.MutableState
-import chat.simplex.common.model.ChatItem
+import chat.simplex.common.model.*
 import chat.simplex.common.views.usersettings.showInDevelopingAlert
 import kotlinx.coroutines.CoroutineScope
 
@@ -18,7 +18,7 @@ actual class RecorderNative: RecorderInterface {
 }
 
 actual object AudioPlayer: AudioPlayerInterface {
-  override fun play(filePath: String?, audioPlaying: MutableState<Boolean>, progress: MutableState<Int>, duration: MutableState<Int>, resetOnEnd: Boolean) {
+  override fun play(fileSource: CryptoFile, audioPlaying: MutableState<Boolean>, progress: MutableState<Int>, duration: MutableState<Int>, resetOnEnd: Boolean) {
     showInDevelopingAlert()
   }
 

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Share.desktop.kt

@@ -3,6 +3,8 @@ package chat.simplex.common.platform
 import androidx.compose.ui.platform.ClipboardManager
 import androidx.compose.ui.platform.UriHandler
 import androidx.compose.ui.text.AnnotatedString
+import chat.simplex.common.model.*
+import chat.simplex.common.views.helpers.getAppFileUri
 import chat.simplex.common.views.helpers.withApi
 import java.io.File
 import java.net.URI
@@ -20,12 +22,16 @@ actual fun ClipboardManager.shareText(text: String) {
   showToast(MR.strings.copied.localized())
 }
 
-actual fun shareFile(text: String, filePath: String) {
+actual fun shareFile(text: String, fileSource: CryptoFile) {
   withApi {
     FileChooserLauncher(false) { to: URI? ->
       if (to != null) {
-        copyFileToFile(File(filePath), to) {}
+        if (fileSource.cryptoArgs != null) {
+          decryptCryptoFile(getAppFilePath(fileSource.filePath), fileSource.cryptoArgs, to.path)
+        } else {
+          copyFileToFile(File(fileSource.filePath), to) {}
+        }
       }
-    }.launch(filePath)
+    }.launch(fileSource.filePath)
   }
 }

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/chat/item/CIImageView.desktop.kt

@@ -11,7 +11,7 @@ import java.net.URI
 
 @Composable
 actual fun SimpleAndAnimatedImageView(
-  uri: URI,
+  data: ByteArray,
   imageBitmap: ImageBitmap,
   file: CIFile?,
   imageProvider: () -> ImageGalleryProvider,

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/chat/item/ChatItemView.desktop.kt

@@ -31,7 +31,7 @@ actual fun ReactionIcon(text: String, fontSize: TextUnit) {
 
 @Composable
 actual fun SaveContentItemAction(cItem: ChatItem, saveFileLauncher: FileChooserLauncher, showMenu: MutableState<Boolean>) {
-  ItemAction(stringResource(MR.strings.save_verb), painterResource(MR.images.ic_download), onClick = {
+  ItemAction(stringResource(MR.strings.save_verb), painterResource(if (cItem.file?.fileSource?.cryptoArgs == null) MR.images.ic_download else MR.images.ic_lock_open_right), onClick = {
     when (cItem.content.msgContent) {
       is MsgContent.MCImage, is MsgContent.MCFile, is MsgContent.MCVoice, is MsgContent.MCVideo -> withApi { saveFileLauncher.launch(cItem.file?.fileName ?: "") }
       else -> {}

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/chat/item/ImageFullScreenView.desktop.kt

@@ -4,19 +4,16 @@ import androidx.compose.foundation.Image
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.*
-import androidx.compose.ui.graphics.painter.BitmapPainter
 import androidx.compose.ui.layout.ContentScale
 import chat.simplex.common.platform.VideoPlayer
-import chat.simplex.common.views.helpers.getBitmapFromUri
+import chat.simplex.common.views.helpers.getBitmapFromByteArray
 import chat.simplex.res.MR
-import dev.icerock.moko.resources.compose.painterResource
 import dev.icerock.moko.resources.compose.stringResource
-import java.net.URI
 
 @Composable
-actual fun FullScreenImageView(modifier: Modifier, uri: URI, imageBitmap: ImageBitmap) {
+actual fun FullScreenImageView(modifier: Modifier, data: ByteArray, imageBitmap: ImageBitmap) {
   Image(
-    getBitmapFromUri(uri, false) ?: MR.images.decentralized.image.toComposeImageBitmap(),
+    getBitmapFromByteArray(data, false) ?: MR.images.decentralized.image.toComposeImageBitmap(),
     contentDescription = stringResource(MR.strings.image_descr),
     contentScale = ContentScale.Fit,
     modifier = modifier,

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/helpers/Utils.desktop.kt

@@ -6,8 +6,10 @@ import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.Density
 import chat.simplex.common.model.CIFile
+import chat.simplex.common.model.readCryptoFile
 import chat.simplex.common.platform.*
 import chat.simplex.common.simplexWindowState
+import java.io.ByteArrayInputStream
 import java.io.File
 import java.net.URI
 import javax.imageio.ImageIO
@@ -88,11 +90,12 @@ actual fun escapedHtmlToAnnotatedString(text: String, density: Density): Annotat
 actual fun getAppFileUri(fileName: String): URI =
   URI("file:" + appFilesDir.absolutePath + File.separator + fileName)
 
-actual fun getLoadedImage(file: CIFile?): ImageBitmap? {
+actual fun getLoadedImage(file: CIFile?): Pair<ImageBitmap, ByteArray>? {
   val filePath = getLoadedFilePath(file)
   return if (filePath != null) {
-    val uri = getAppFileUri(filePath.substringAfterLast(File.separator))
-    getBitmapFromUri(uri, false)
+    val data = if (file?.fileSource?.cryptoArgs != null) readCryptoFile(filePath, file.fileSource.cryptoArgs) else File(filePath).readBytes()
+    val bitmap = getBitmapFromByteArray(data, false)
+    if (bitmap != null) bitmap to data else null
   } else {
     null
   }
@@ -107,6 +110,9 @@ actual fun getFileSize(uri: URI): Long? = uri.toPath().toFile().length()
 actual fun getBitmapFromUri(uri: URI, withAlertOnException: Boolean): ImageBitmap? =
   ImageIO.read(uri.inputStream()).toComposeImageBitmap()
 
+actual fun getBitmapFromByteArray(data: ByteArray, withAlertOnException: Boolean): ImageBitmap? =
+  ImageIO.read(ByteArrayInputStream(data)).toComposeImageBitmap()
+
 // LALAL implement to support animated drawable
 actual fun getDrawableFromUri(uri: URI, withAlertOnException: Boolean): Any? = null