/* * Copyright (C) 2014 Dominik Schürmann * Copyright (C) 2014 Vincent Breitmoser * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ package org.sufficientlysecure.keychain.provider; import android.content.ContentProvider; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.MatrixCursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.net.Uri; import android.os.ParcelFileDescriptor; import android.provider.OpenableColumns; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.util.DatabaseUtil; import java.io.File; import java.io.FileNotFoundException; import java.io.IOException; public class TemporaryStorageProvider extends ContentProvider { private static final String DB_NAME = "tempstorage.db"; private static final String TABLE_FILES = "files"; private static final String COLUMN_ID = "id"; private static final String COLUMN_NAME = "name"; private static final String COLUMN_TIME = "time"; private static final Uri BASE_URI = Uri.parse("content://org.sufficientlysecure.keychain.tempstorage/"); private static final int DB_VERSION = 1; public static Uri createFile(Context context, String targetName) { ContentValues contentValues = new ContentValues(); contentValues.put(COLUMN_NAME, targetName); return context.getContentResolver().insert(BASE_URI, contentValues); } public static int cleanUp(Context context) { return context.getContentResolver().delete(BASE_URI, COLUMN_TIME + "< ?", new String[]{Long.toString(System.currentTimeMillis() - Constants.TEMPFILE_TTL)}); } private class TemporaryStorageDatabase extends SQLiteOpenHelper { public TemporaryStorageDatabase(Context context) { super(context, DB_NAME, null, DB_VERSION); } @Override public void onCreate(SQLiteDatabase db) { db.execSQL("CREATE TABLE IF NOT EXISTS " + TABLE_FILES + " (" + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + COLUMN_NAME + " TEXT, " + COLUMN_TIME + " INTEGER" + ");"); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } } private TemporaryStorageDatabase db; private File getFile(Uri uri) throws FileNotFoundException { try { return getFile(Integer.parseInt(uri.getLastPathSegment())); } catch (NumberFormatException e) { throw new FileNotFoundException(); } } private File getFile(int id) { return new File(getContext().getCacheDir(), "temp/" + id); } @Override public boolean onCreate() { db = new TemporaryStorageDatabase(getContext()); return new File(getContext().getCacheDir(), "temp").mkdirs(); } @Override public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { File file; try { file = getFile(uri); } catch (FileNotFoundException e) { return null; } Cursor fileName = db.getReadableDatabase().query(TABLE_FILES, new String[]{COLUMN_NAME}, COLUMN_ID + "=?", new String[]{uri.getLastPathSegment()}, null, null, null); if (fileName != null) { if (fileName.moveToNext()) { MatrixCursor cursor = new MatrixCursor(new String[]{OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE, "_data"}); cursor.newRow().add(fileName.getString(0)).add(file.length()).add(file.getAbsolutePath()); fileName.close(); return cursor; } fileName.close(); } return null; } @Override public String getType(Uri uri) { // Note: If we can find a files mime type, we can decrypt it to temp storage and open it after // encryption. The mime type is needed, else UI really sucks and some apps break. return "*/*"; } @Override public Uri insert(Uri uri, ContentValues values) { if (!values.containsKey(COLUMN_TIME)) { values.put(COLUMN_TIME, System.currentTimeMillis()); } int insert = (int) db.getWritableDatabase().insert(TABLE_FILES, null, values); try { getFile(insert).createNewFile(); } catch (IOException e) { return null; } return Uri.withAppendedPath(BASE_URI, Long.toString(insert)); } @Override public int delete(Uri uri, String selection, String[] selectionArgs) { if (uri.getLastPathSegment() != null) { selection = DatabaseUtil.concatenateWhere(selection, COLUMN_ID + "=?"); selectionArgs = DatabaseUtil.appendSelectionArgs(selectionArgs, new String[]{uri.getLastPathSegment()}); } Cursor files = db.getReadableDatabase().query(TABLE_FILES, new String[]{COLUMN_ID}, selection, selectionArgs, null, null, null); if (files != null) { while (files.moveToNext()) { getFile(files.getInt(0)).delete(); } files.close(); return db.getWritableDatabase().delete(TABLE_FILES, selection, selectionArgs); } return 0; } @Override public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { throw new UnsupportedOperationException("Update not supported"); } @Override public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException { return openFileHelper(uri, mode); } } 'n43' href='#n43'>43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146