#250 Recover AutoUploadFilesStore due to class obfuscation

AutoUploadFilesStore, which handles serializing the paths marked to upload, is obfuscated in version 1.5.10 and 1.5.11-beta1, each differently. This causes deserialisation to fail in 1.5.11-beta1 which is now fixed for the next version.

presentation/src/main/java/org/cryptomator/presentation/e/c.java

@@ -0,0 +1,57 @@
+package org.cryptomator.presentation.e;
+
+import java.io.Serializable;
+import java.util.Set;
+
+/**
+ * This file is the obfuscated AutoUploadFilesStore of Cryptomator in version 1.5.10
+ * and is used to recover it in version 1.5.11 and 1.5.11-beta2
+ *
+ * TODO Delete as soon as possible
+ *
+ * See more information: https://github.com/cryptomator/android/issues/250
+ */
+
+public final class c implements Serializable {
+
+	public static final a Qb = new a();
+	private static final long serialVersionUID = -2190476748996271234L;
+
+	private final Set<String> vlb;
+
+	public c(Set<String> paramSet) {
+		this.vlb = paramSet;
+	}
+
+	public boolean equals(Object paramObject) {
+		if (this != paramObject) {
+			if (paramObject instanceof c) {
+				Object paramObject2 = ((c)paramObject).vlb;
+				return (this.vlb == null) ? ((paramObject2 == null)) : this.vlb.equals(paramObject2);
+			}
+			return false;
+		}
+		return true;
+	}
+
+	public int hashCode() {
+		Set<String> set = this.vlb;
+		return (set != null) ? set.hashCode() : 0;
+	}
+
+	public final Set<String> mE() {
+		return this.vlb;
+	}
+
+	public String toString() {
+		StringBuilder stringBuilder = new StringBuilder();
+		stringBuilder.append("AutoUploadFilesStore(uris=");
+		stringBuilder.append(this.vlb);
+		stringBuilder.append(")");
+		return stringBuilder.toString();
+	}
+
+	public static final class a {
+		private a() {}
+	}
+}

presentation/src/main/java/org/cryptomator/presentation/i/a.java

@@ -0,0 +1,57 @@
+package org.cryptomator.presentation.i;
+
+import java.io.Serializable;
+import java.util.Set;
+
+/**
+ * This file is the obfuscated AutoUploadFilesStore of Cryptomator in version 1.5.11-beta1
+ * and is used to recover it in version 1.5.11-beta2
+ *
+ * TODO Delete as soon as possible
+ *
+ * See more information: https://github.com/cryptomator/android/issues/250
+ */
+
+public final class a implements Serializable {
+
+	private static final long serialVersionUID = 5147365921479820025L;
+	private final Set<String> b;
+
+	public a(Set<String> paramSet) {
+		this.b = paramSet;
+	}
+
+	public final Set<String> b() {
+		return this.b;
+	}
+
+	public boolean equals(Object paramObject) {
+		if (this != paramObject) {
+			if (paramObject instanceof a) {
+				Object paramObject2 = ((a)paramObject).b;
+				return (this.b == null) ? ((paramObject2 == null)) : this.b.equals(paramObject2);
+			}
+			return false;
+		}
+		return true;
+	}
+
+	public int hashCode() {
+		int bool;
+		Set<String> set = this.b;
+		if (set != null) {
+			bool = set.hashCode();
+		} else {
+			bool = 0;
+		}
+		return bool;
+	}
+
+	public String toString() {
+		StringBuilder stringBuilder = new StringBuilder();
+		stringBuilder.append("AutoUploadFilesStore(uris=");
+		stringBuilder.append(this.b);
+		stringBuilder.append(")");
+		return stringBuilder.toString();
+	}
+}

presentation/src/main/java/org/cryptomator/presentation/util/FileUtil.kt

@@ -125,7 +125,9 @@ class FileUtil @Inject constructor(private val context: Context, private val mim
 
 	fun getImagePreviewFiles(path: String): ImagePreviewFilesStore {
 		try {
-			ObjectInputStream(FileInputStream(path)).use { objectInputStream -> return objectInputStream.readObject() as ImagePreviewFilesStore }
+			ObjectInputStream(FileInputStream(path)).use { objectInputStream ->
+				return objectInputStream.readObject() as ImagePreviewFilesStore
+			}
 		} catch (e: ClassNotFoundException) {
 			Timber //
 					.tag("FileUtil") //
@@ -139,40 +141,39 @@ class FileUtil @Inject constructor(private val context: Context, private val mim
 		}
 	}
 
-	fun addImageToAutoUploads(path: String) {
-		val file = File(decryptedFileStorage, AUTO_UPLOAD_IMAGE__FILE_NAMES)
-		val paths = getAutoUploadFilesStore(file).uris + path
-		addImageToAutoUploads(paths)
+	fun addImageToAutoUploads(path: String): AutoUploadFilesStore {
+		val paths = getAutoUploadFilesStore().uris + path
+		return addImageToAutoUploads(paths)
 	}
 
-	private fun addImageToAutoUploads(paths: Set<String>) {
-		addImageToAutoUploads(AutoUploadFilesStore(paths))
+	private fun addImageToAutoUploads(paths: Set<String>): AutoUploadFilesStore {
+		return addImageToAutoUploads(AutoUploadFilesStore(paths))
 	}
 
 	@Synchronized
-	private fun addImageToAutoUploads(autoUploadFilesStore: AutoUploadFilesStore) {
+	private fun addImageToAutoUploads(autoUploadFilesStore: AutoUploadFilesStore): AutoUploadFilesStore {
 		try {
 			decryptedFileStorage.mkdir()
+
 			val file = File(decryptedFileStorage, AUTO_UPLOAD_IMAGE__FILE_NAMES)
-			val out: ObjectOutput = ObjectOutputStream(FileOutputStream(file.path))
-			out.writeObject(autoUploadFilesStore)
-			out.close()
+
+			ObjectOutputStream(FileOutputStream(file.path)).use { objectOutputStream ->
+				objectOutputStream.writeObject(autoUploadFilesStore)
+				objectOutputStream.close()
+			}
+
+			return autoUploadFilesStore
 		} catch (e: IOException) {
 			Timber //
 					.tag("FileUtil") //
 					.e(e, "Failed to store image preview file list for PreviewActivity")
+			throw FatalBackendException(e)
 		}
 	}
 
-	@get:Throws(FatalBackendException::class)
-	val autoUploadFilesStore: AutoUploadFilesStore
-		get() {
-			val file = File(decryptedFileStorage, AUTO_UPLOAD_IMAGE__FILE_NAMES)
-			return getAutoUploadFilesStore(file)
-		}
-
 	@Synchronized
-	private fun getAutoUploadFilesStore(file: File): AutoUploadFilesStore {
+	fun getAutoUploadFilesStore(): AutoUploadFilesStore {
+		val file = File(decryptedFileStorage, AUTO_UPLOAD_IMAGE__FILE_NAMES)
 		if (!file.exists()) {
 			return AutoUploadFilesStore(HashSet())
 		}
@@ -183,20 +184,9 @@ class FileUtil @Inject constructor(private val context: Context, private val mim
 				return autoUploadFilesStore
 			}
 		} catch (e: InvalidClassException) {
-			Timber //
-					.tag("FileUtil") //
-					.e(e, "This is a bug in Cryptomator version 1.4.1, only fix is to delete the AutoUploadFilesStore but no image inside so no problem")
-			if (!file.delete()) {
-				Timber //
-						.tag("FileUtil") //
-						.e("Failed to delete AutoUploadFilesStore")
-			}
-			throw FatalBackendException(e)
-		} catch (e: ClassNotFoundException) {
-			Timber //
-					.tag("FileUtil") //
-					.e(e, "Failed to read image preview file from list for PreviewActivity")
-			throw FatalBackendException(e)
+			return tryRecoverAutoUploadFilesStoreDueToFileObfuscation(file)
+		} catch (e: ClassCastException) {
+			return tryRecoverAutoUploadFilesStoreDueToFileObfuscation(file)
 		} catch (e: IOException) {
 			Timber
 					.tag("FileUtil")
@@ -205,20 +195,47 @@ class FileUtil @Inject constructor(private val context: Context, private val mim
 		}
 	}
 
+	/**
+	 * This method tries to recover the AutoUploadFilesStore which was obfuscated in version 1.5.10 and 1.5.11-beta1, each differently
+	 */
+	private fun tryRecoverAutoUploadFilesStoreDueToFileObfuscation(file: File): AutoUploadFilesStore {
+		Timber.tag("FileUtil").i("Try to recover AutoUploadFilesStore using class c or a")
+		try {
+			ObjectInputStream(FileInputStream(file)).use { objectInputStream ->
+				val uploadPaths = when (val obj = objectInputStream.readObject()) {
+					is org.cryptomator.presentation.e.c -> obj.mE() // version 1.5.10
+					is org.cryptomator.presentation.i.a -> obj.b() // version 1.5.11-beta1
+					else -> null
+				}
+				when {
+					uploadPaths != null -> {
+						Timber.tag("FileUtil").i("Nailed it! Successfully recovered AutoUploadFilesStore!")
+						file.delete()
+						return AutoUploadFilesStore(uploadPaths)
+					}
+					else -> throw FatalBackendException("Failed to recover AutoUploadFilesStore")
+				}
+			}
+		} catch (e: Exception) {
+			throw FatalBackendException("Failed to recover AutoUploadFilesStore", e)
+		}
+	}
+
 	@Synchronized
-	fun removeImagesFromAutoUploads(names: Set<String>) {
-		val autoUploadFilesStore = autoUploadFilesStore
+	fun removeImagesFromAutoUploads(names: Set<String>): AutoUploadFilesStore {
+		val autoUploadFilesStore = getAutoUploadFilesStore()
 		var paths = autoUploadFilesStore.uris
 
 		if (autoUploadFilesStore.uris.isEmpty()) {
-			return
+			return autoUploadFilesStore
 		}
 
 		val dirPath = File(autoUploadFilesStore.uris.iterator().next()).parent
 		names.forEach { name ->
 			paths = paths.minus(String.format("%s/%s", dirPath, name))
 		}
-		addImageToAutoUploads(paths)
+
+		return addImageToAutoUploads(paths)
 	}
 
 	class FileInfo(val name: String, mimeTypes: MimeTypes) {