diff options
5 files changed, 201 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/AndroidManifest.xml b/OpenKeychain/src/main/AndroidManifest.xml index 3ce200008..6a67ac9bf 100644 --- a/OpenKeychain/src/main/AndroidManifest.xml +++ b/OpenKeychain/src/main/AndroidManifest.xml @@ -49,6 +49,9 @@ android:name="android.hardware.touchscreen" android:required="false" /> + <permission android:name="org.sufficientlysecure.keychain.WRITE_TEMPORARY_STORAGE"/> + <uses-permission android:name="org.sufficientlysecure.keychain.WRITE_TEMPORARY_STORAGE"/> + <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.NFC" /> @@ -484,6 +487,12 @@ android:resource="@xml/custom_pgp_contacts_structure"/> </service> + <provider + android:name=".provider.TemporaryStorageProvider" + android:authorities="org.sufficientlysecure.keychain.tempstorage" + android:writePermission="org.sufficientlysecure.keychain.WRITE_TEMPORARY_STORAGE" + android:exported="true"/> + </application> </manifest> diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/Constants.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/Constants.java index eeb9fa389..956019605 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/Constants.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/Constants.java @@ -53,6 +53,8 @@ public final class Constants { public static boolean KITKAT = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT; + public static int TEMPFILE_TTL = 24*60*60*1000; // 1 day + public static final class Path { public static final File APP_DIR = new File(Environment.getExternalStorageDirectory(), "OpenKeychain"); public static final File APP_DIR_FILE = new File(APP_DIR, "export.asc"); diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/KeychainApplication.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/KeychainApplication.java index be9c1e405..125573b53 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/KeychainApplication.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/KeychainApplication.java @@ -28,6 +28,7 @@ import android.os.Environment; import org.spongycastle.jce.provider.BouncyCastleProvider; import org.sufficientlysecure.keychain.helper.Preferences; import org.sufficientlysecure.keychain.helper.TlsHelper; +import org.sufficientlysecure.keychain.provider.TemporaryStorageProvider; import org.sufficientlysecure.keychain.util.Log; import org.sufficientlysecure.keychain.util.PRNGFixes; @@ -85,6 +86,8 @@ public class KeychainApplication extends Application { Preferences.getPreferences(this).updateKeyServers(); TlsHelper.addStaticCA("pool.sks-keyservers.net", getAssets(), "sks-keyservers.netCA.cer"); + + TemporaryStorageProvider.cleanUp(this); } public static void setupAccountAsNeeded(Context context) { diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/TemporaryStorageProvider.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/TemporaryStorageProvider.java new file mode 100644 index 000000000..9e745215d --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/TemporaryStorageProvider.java @@ -0,0 +1,151 @@ +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) { + 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); + } +} diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/DatabaseUtil.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/DatabaseUtil.java new file mode 100644 index 000000000..c18e5cabd --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/DatabaseUtil.java @@ -0,0 +1,36 @@ +package org.sufficientlysecure.keychain.util; + +import android.text.TextUtils; + +/** + * Shamelessly copied from android.database.DatabaseUtils + */ +public class DatabaseUtil { + /** + * Concatenates two SQL WHERE clauses, handling empty or null values. + */ + public static String concatenateWhere(String a, String b) { + if (TextUtils.isEmpty(a)) { + return b; + } + if (TextUtils.isEmpty(b)) { + return a; + } + + return "(" + a + ") AND (" + b + ")"; + } + + /** + * Appends one set of selection args to another. This is useful when adding a selection + * argument to a user provided set. + */ + public static String[] appendSelectionArgs(String[] originalValues, String[] newValues) { + if (originalValues == null || originalValues.length == 0) { + return newValues; + } + String[] result = new String[originalValues.length + newValues.length ]; + System.arraycopy(originalValues, 0, result, 0, originalValues.length); + System.arraycopy(newValues, 0, result, originalValues.length, newValues.length); + return result; + } +} |