| /******************************************************************************* |
| * Copyright (c) 2008, 2010 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.security.storage; |
| |
| /** |
| * Utility class to encode forward slash characters so that strings containing |
| * forward slashes can be used as node names with secure preferences. It is |
| * the responsibility of the consumer to manually encode such strings before |
| * attempting to obtain corresponding nodes from secure preferences. |
| * <p> |
| * Internally, the class uses a subset of JIT encoding. The forward slashes |
| * and backward slashes are encoded. |
| * </p><p> |
| * This class is not intended to be instantiated or subclassed by users. |
| * </p> |
| */ |
| final public class SlashEncode { |
| |
| final private static char SLASH = '/'; |
| final private static char BACK_SLASH = '\\'; |
| |
| final private static String ENCODED_SLASH = "\\2f"; //$NON-NLS-1$ |
| final private static String ENCODED_BACK_SLASH = "\\5c"; //$NON-NLS-1$ |
| |
| static public String decode(String str) { |
| if (str == null) |
| return null; |
| int size = str.length(); |
| if (size == 0) |
| return str; |
| |
| StringBuffer processed = new StringBuffer(size); |
| int processedPos = 0; |
| |
| for (int i = 0; i < size; i++) { |
| char c = str.charAt(i); |
| if (c == BACK_SLASH) { |
| if (i + 2 >= size) |
| continue; |
| String encoded = str.substring(i, i + 3); |
| char decoded = 0; |
| if (ENCODED_SLASH.equals(encoded)) |
| decoded = SLASH; |
| else if (ENCODED_BACK_SLASH.equals(encoded)) |
| decoded = BACK_SLASH; |
| if (decoded == 0) |
| continue; |
| if (i > processedPos) |
| processed.append(str.substring(processedPos, i)); |
| processed.append(decoded); |
| processedPos = i + 3; |
| i += 2; // skip over remaining encoded portion |
| } |
| } |
| if (processedPos == 0) |
| return str; |
| if (processedPos < size) |
| processed.append(str.substring(processedPos)); |
| return new String(processed); |
| } |
| |
| static public String encode(String str) { |
| if (str == null) |
| return null; |
| int size = str.length(); |
| if (size == 0) |
| return str; |
| |
| StringBuffer processed = new StringBuffer(size); |
| int processedPos = 0; |
| |
| for (int i = 0; i < size; i++) { |
| char c = str.charAt(i); |
| if (c == SLASH || c == BACK_SLASH) { |
| if (i > processedPos) |
| processed.append(str.substring(processedPos, i)); |
| if (c == SLASH) |
| processed.append(ENCODED_SLASH); |
| else if (c == BACK_SLASH) |
| processed.append(ENCODED_BACK_SLASH); |
| processedPos = i + 1; |
| } |
| } |
| if (processedPos == 0) |
| return str; |
| if (processedPos < size) |
| processed.append(str.substring(processedPos)); |
| return new String(processed); |
| } |
| |
| } |