96 lines
4.1 KiB
Java
96 lines
4.1 KiB
Java
/**
|
|
*
|
|
* Copyright 2017 Paul Schaub
|
|
*
|
|
* 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.omemo.provider;
|
|
|
|
import org.jivesoftware.smack.provider.ExtensionElementProvider;
|
|
import org.jivesoftware.smack.util.stringencoder.Base64;
|
|
import org.jivesoftware.smackx.omemo.element.OmemoVAxolotlElement;
|
|
import org.xmlpull.v1.XmlPullParser;
|
|
|
|
import java.util.ArrayList;
|
|
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.ENCRYPTED;
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.HEADER;
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.IV;
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.KEY;
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.PAYLOAD;
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.PREKEY;
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.RID;
|
|
import static org.jivesoftware.smackx.omemo.element.OmemoElement.SID;
|
|
import static org.xmlpull.v1.XmlPullParser.END_TAG;
|
|
import static org.xmlpull.v1.XmlPullParser.START_TAG;
|
|
|
|
/**
|
|
* Smack ExtensionProvider that parses incoming OMEMO Message element into OmemoMessageElement objects.
|
|
*
|
|
* @author Paul Schaub
|
|
*/
|
|
public class OmemoVAxolotlProvider extends ExtensionElementProvider<OmemoVAxolotlElement> {
|
|
|
|
@Override
|
|
public OmemoVAxolotlElement parse(XmlPullParser parser, int initialDepth) throws Exception {
|
|
boolean inEncrypted = true;
|
|
int sid = -1;
|
|
ArrayList<OmemoVAxolotlElement.OmemoHeader.Key> keys = new ArrayList<>();
|
|
byte[] iv = null;
|
|
byte[] payload = null;
|
|
|
|
while (inEncrypted) {
|
|
int tag = parser.next();
|
|
String name = parser.getName();
|
|
switch (tag) {
|
|
case START_TAG:
|
|
switch (name) {
|
|
case HEADER:
|
|
for (int i = 0; i < parser.getAttributeCount(); i++) {
|
|
if (parser.getAttributeName(i).equals(SID)) {
|
|
sid = Integer.parseInt(parser.getAttributeValue(i));
|
|
}
|
|
}
|
|
break;
|
|
case KEY:
|
|
boolean prekey = false;
|
|
int rid = -1;
|
|
for (int i = 0; i < parser.getAttributeCount(); i++) {
|
|
if (parser.getAttributeName(i).equals(PREKEY)) {
|
|
prekey = Boolean.parseBoolean(parser.getAttributeValue(i));
|
|
} else if (parser.getAttributeName(i).equals(RID)) {
|
|
rid = Integer.parseInt(parser.getAttributeValue(i));
|
|
}
|
|
}
|
|
keys.add(new OmemoVAxolotlElement.OmemoHeader.Key(Base64.decode(parser.nextText()), rid, prekey));
|
|
break;
|
|
case IV:
|
|
iv = Base64.decode(parser.nextText());
|
|
break;
|
|
case PAYLOAD:
|
|
payload = Base64.decode(parser.nextText());
|
|
break;
|
|
}
|
|
break;
|
|
case END_TAG:
|
|
if (name.equals(ENCRYPTED)) {
|
|
inEncrypted = false;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
OmemoVAxolotlElement.OmemoHeader header = new OmemoVAxolotlElement.OmemoHeader(sid, keys, iv);
|
|
return new OmemoVAxolotlElement(header, payload);
|
|
}
|
|
}
|