153 lines
5.5 KiB
Java
153 lines
5.5 KiB
Java
/*
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* Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de>
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* Copyright (C) 2011 Markus Doits <markus.doits@googlemail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.provider;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.provider.KeychainServiceBlobContract.Blobs;
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import org.sufficientlysecure.keychain.provider.KeychainServiceBlobContract.BlobsColumns;
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import org.sufficientlysecure.keychain.util.Log;
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import android.content.ContentProvider;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import android.net.Uri;
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import android.os.ParcelFileDescriptor;
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import android.provider.BaseColumns;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.util.List;
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import java.util.UUID;
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public class KeychainServiceBlobProvider extends ContentProvider {
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private static final String STORE_PATH = Constants.path.APP_DIR + "/ApgBlobs";
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private KeychainServiceBlobDatabase mBlobDatabase = null;
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public KeychainServiceBlobProvider() {
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File dir = new File(STORE_PATH);
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dir.mkdirs();
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}
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@Override
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public boolean onCreate() {
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mBlobDatabase = new KeychainServiceBlobDatabase(getContext());
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return true;
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}
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/** {@inheritDoc} */
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@Override
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public Uri insert(Uri uri, ContentValues ignored) {
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// ContentValues are actually ignored, because we want to store a blob with no more
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// information but have to create an record with the password generated here first
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ContentValues vals = new ContentValues();
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// Insert a random key in the database. This has to provided by the caller when updating or
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// getting the blob
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String password = UUID.randomUUID().toString();
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vals.put(BlobsColumns.KEY, password);
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SQLiteDatabase db = mBlobDatabase.getWritableDatabase();
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long newRowId = db.insert(KeychainServiceBlobDatabase.TABLE, null, vals);
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Uri insertedUri = ContentUris.withAppendedId(Blobs.CONTENT_URI, newRowId);
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return Uri.withAppendedPath(insertedUri, password);
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}
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/** {@inheritDoc} */
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@Override
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public ParcelFileDescriptor openFile(Uri uri, String mode) throws SecurityException,
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FileNotFoundException {
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Log.d(Constants.TAG, "openFile() called with uri: " + uri.toString() + " and mode: " + mode);
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List<String> segments = uri.getPathSegments();
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if (segments.size() < 2) {
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throw new SecurityException("Password not found in URI");
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}
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String id = segments.get(0);
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String key = segments.get(1);
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Log.d(Constants.TAG, "Got id: " + id + " and key: " + key);
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// get the data
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SQLiteDatabase db = mBlobDatabase.getReadableDatabase();
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Cursor result = db.query(KeychainServiceBlobDatabase.TABLE, new String[] { BaseColumns._ID },
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BaseColumns._ID + " = ? and " + BlobsColumns.KEY + " = ?",
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new String[] { id, key }, null, null, null);
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if (result.getCount() == 0) {
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// either the key is wrong or no id exists
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throw new FileNotFoundException("No file found with that ID and/or password");
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}
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File targetFile = new File(STORE_PATH, id);
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if (mode.equals("w")) {
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Log.d(Constants.TAG, "Try to open file w");
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if (!targetFile.exists()) {
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try {
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targetFile.createNewFile();
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} catch (IOException e) {
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Log.e(Constants.TAG, "Got IEOException on creating new file", e);
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throw new FileNotFoundException("Could not create file to write to");
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}
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}
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return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_WRITE_ONLY
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| ParcelFileDescriptor.MODE_TRUNCATE);
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} else if (mode.equals("r")) {
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Log.d(Constants.TAG, "Try to open file r");
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if (!targetFile.exists()) {
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throw new FileNotFoundException("Error: Could not find the file requested");
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}
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return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_READ_ONLY);
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}
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return null;
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}
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/** {@inheritDoc} */
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@Override
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public String getType(Uri uri) {
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return null;
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}
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/** {@inheritDoc} */
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@Override
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public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
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String sortOrder) {
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return null;
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}
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/** {@inheritDoc} */
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@Override
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public int delete(Uri uri, String selection, String[] selectionArgs) {
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return 0;
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}
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/** {@inheritDoc} */
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@Override
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public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
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return 0;
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}
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}
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