/** | |
* 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; | |
} | |
} |