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https://github.com/vanitasvitae/Smack.git
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4133eb175c
Introducing Smack's own XmlPullParser interface which tries to stay as compatible as possible to XPP3. The interface is used to either wrap StAX's XMLStreamReader if Smack is used on Java SE, and XPP3's XmlPullParser if Smack is used on on Android. Fixes SMACK-591. Also introduce JUnit 5 and non-strict javadoc projects.
98 lines
4.3 KiB
Java
98 lines
4.3 KiB
Java
/**
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*
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* Copyright 2017 Paul Schaub
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.omemo.provider;
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import static org.jivesoftware.smackx.omemo.element.OmemoElement.ATTR_PAYLOAD;
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import static org.jivesoftware.smackx.omemo.element.OmemoElement.NAME_ENCRYPTED;
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import java.io.IOException;
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import java.util.ArrayList;
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import org.jivesoftware.smack.packet.XmlEnvironment;
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import org.jivesoftware.smack.provider.ExtensionElementProvider;
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import org.jivesoftware.smack.util.stringencoder.Base64;
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import org.jivesoftware.smack.xml.XmlPullParser;
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import org.jivesoftware.smack.xml.XmlPullParserException;
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import org.jivesoftware.smackx.omemo.element.OmemoElement_VAxolotl;
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import org.jivesoftware.smackx.omemo.element.OmemoHeaderElement;
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import org.jivesoftware.smackx.omemo.element.OmemoHeaderElement_VAxolotl;
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import org.jivesoftware.smackx.omemo.element.OmemoKeyElement;
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/**
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* Smack ExtensionProvider that parses incoming OMEMO Message element into OmemoMessageElement objects.
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*
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* @author Paul Schaub
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*/
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public class OmemoVAxolotlProvider extends ExtensionElementProvider<OmemoElement_VAxolotl> {
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@Override
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public OmemoElement_VAxolotl parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException {
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boolean inEncrypted = true;
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int sid = -1;
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ArrayList<OmemoKeyElement> keys = new ArrayList<>();
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byte[] iv = null;
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byte[] payload = null;
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while (inEncrypted) {
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XmlPullParser.Event tag = parser.next();
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String name = parser.getName();
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switch (tag) {
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case START_ELEMENT:
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switch (name) {
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case OmemoHeaderElement.NAME_HEADER:
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for (int i = 0; i < parser.getAttributeCount(); i++) {
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if (parser.getAttributeName(i).equals(OmemoHeaderElement.ATTR_SID)) {
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sid = Integer.parseInt(parser.getAttributeValue(i));
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}
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}
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break;
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case OmemoKeyElement.NAME_KEY:
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boolean prekey = false;
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int rid = -1;
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for (int i = 0; i < parser.getAttributeCount(); i++) {
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if (parser.getAttributeName(i).equals(OmemoKeyElement.ATTR_PREKEY)) {
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prekey = Boolean.parseBoolean(parser.getAttributeValue(i));
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} else if (parser.getAttributeName(i).equals(OmemoKeyElement.ATTR_RID)) {
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rid = Integer.parseInt(parser.getAttributeValue(i));
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}
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}
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keys.add(new OmemoKeyElement(Base64.decode(parser.nextText()), rid, prekey));
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break;
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case OmemoHeaderElement.ATTR_IV:
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iv = Base64.decode(parser.nextText());
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break;
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case ATTR_PAYLOAD:
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payload = Base64.decode(parser.nextText());
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break;
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}
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break;
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case END_ELEMENT:
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if (name.equals(NAME_ENCRYPTED)) {
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inEncrypted = false;
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}
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break;
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default:
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// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
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break;
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}
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}
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OmemoHeaderElement_VAxolotl header = new OmemoHeaderElement_VAxolotl(sid, keys, iv);
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return new OmemoElement_VAxolotl(header, payload);
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}
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}
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