OmemoVAxolotlProvider.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 static org.jivesoftware.smackx.omemo.element.OmemoElement.ATTR_PAYLOAD;
- import java.io.IOException;
- import java.util.ArrayList;
- import org.jivesoftware.smack.packet.XmlEnvironment;
- import org.jivesoftware.smack.provider.ExtensionElementProvider;
- import org.jivesoftware.smack.util.stringencoder.Base64;
- import org.jivesoftware.smack.xml.XmlPullParser;
- import org.jivesoftware.smack.xml.XmlPullParserException;
- import org.jivesoftware.smackx.omemo.element.OmemoElement_VAxolotl;
- import org.jivesoftware.smackx.omemo.element.OmemoHeaderElement;
- import org.jivesoftware.smackx.omemo.element.OmemoHeaderElement_VAxolotl;
- import org.jivesoftware.smackx.omemo.element.OmemoKeyElement;
- /**
- * Smack ExtensionProvider that parses incoming OMEMO Message element into OmemoMessageElement objects.
- *
- * @author Paul Schaub
- */
- public class OmemoVAxolotlProvider extends ExtensionElementProvider<OmemoElement_VAxolotl> {
- @Override
- public OmemoElement_VAxolotl parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException {
- int sid = -1;
- ArrayList<OmemoKeyElement> keys = new ArrayList<>();
- byte[] iv = null;
- byte[] payload = null;
- outerloop: while (true) {
- XmlPullParser.Event tag = parser.next();
- switch (tag) {
- case START_ELEMENT:
- String name = parser.getName();
- switch (name) {
- case OmemoHeaderElement.ELEMENT:
- for (int i = 0; i < parser.getAttributeCount(); i++) {
- if (parser.getAttributeName(i).equals(OmemoHeaderElement.ATTR_SID)) {
- sid = Integer.parseInt(parser.getAttributeValue(i));
- }
- }
- break;
- case OmemoKeyElement.ELEMENT:
- boolean prekey = false;
- int rid = -1;
- for (int i = 0; i < parser.getAttributeCount(); i++) {
- if (parser.getAttributeName(i).equals(OmemoKeyElement.ATTR_PREKEY)) {
- prekey = Boolean.parseBoolean(parser.getAttributeValue(i));
- } else if (parser.getAttributeName(i).equals(OmemoKeyElement.ATTR_RID)) {
- rid = Integer.parseInt(parser.getAttributeValue(i));
- }
- }
- keys.add(new OmemoKeyElement(Base64.decode(parser.nextText()), rid, prekey));
- break;
- case OmemoHeaderElement.ATTR_IV:
- iv = Base64.decode(parser.nextText());
- break;
- case ATTR_PAYLOAD:
- payload = Base64.decode(parser.nextText());
- break;
- }
- break;
- case END_ELEMENT:
- if (parser.getDepth() == initialDepth) {
- break outerloop;
- }
- break;
- default:
- // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
- break;
- }
- }
- OmemoHeaderElement_VAxolotl header = new OmemoHeaderElement_VAxolotl(sid, keys, iv);
- return new OmemoElement_VAxolotl(header, payload);
- }
- }