| /** |
| * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.jivesoftware.smackx.bytestreams.socks5; |
| |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| |
| import org.jivesoftware.smack.XMPPException; |
| import org.jivesoftware.smack.util.StringUtils; |
| |
| /** |
| * A collection of utility methods for SOcKS5 messages. |
| * |
| * @author Henning Staib |
| */ |
| class Socks5Utils { |
| |
| /** |
| * Returns a SHA-1 digest of the given parameters as specified in <a |
| * href="http://xmpp.org/extensions/xep-0065.html#impl-socks5">XEP-0065</a>. |
| * |
| * @param sessionID for the SOCKS5 Bytestream |
| * @param initiatorJID JID of the initiator of a SOCKS5 Bytestream |
| * @param targetJID JID of the target of a SOCKS5 Bytestream |
| * @return SHA-1 digest of the given parameters |
| */ |
| public static String createDigest(String sessionID, String initiatorJID, String targetJID) { |
| StringBuilder b = new StringBuilder(); |
| b.append(sessionID).append(initiatorJID).append(targetJID); |
| return StringUtils.hash(b.toString()); |
| } |
| |
| /** |
| * Reads a SOCKS5 message from the given InputStream. The message can either be a SOCKS5 request |
| * message or a SOCKS5 response message. |
| * <p> |
| * (see <a href="http://tools.ietf.org/html/rfc1928">RFC1928</a>) |
| * |
| * @param in the DataInputStream to read the message from |
| * @return the SOCKS5 message |
| * @throws IOException if a network error occurred |
| * @throws XMPPException if the SOCKS5 message contains an unsupported address type |
| */ |
| public static byte[] receiveSocks5Message(DataInputStream in) throws IOException, XMPPException { |
| byte[] header = new byte[5]; |
| in.readFully(header, 0, 5); |
| |
| if (header[3] != (byte) 0x03) { |
| throw new XMPPException("Unsupported SOCKS5 address type"); |
| } |
| |
| int addressLength = header[4]; |
| |
| byte[] response = new byte[7 + addressLength]; |
| System.arraycopy(header, 0, response, 0, header.length); |
| |
| in.readFully(response, header.length, addressLength + 2); |
| |
| return response; |
| } |
| |
| } |