EncryptedOpenPgpContentElement.java
- /**
- *
- * Copyright 2017-2019 Florian Schmaus, 2018 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.ox.element;
- import java.util.Date;
- import java.util.List;
- import java.util.Set;
- import org.jivesoftware.smack.packet.ExtensionElement;
- import org.jivesoftware.smack.util.Objects;
- import org.jivesoftware.smack.util.RandomUtil;
- import org.jivesoftware.smack.util.StringUtils;
- import org.jivesoftware.smack.util.XmlStringBuilder;
- import org.jxmpp.jid.Jid;
- /**
- * Abstract class that bundles functionality of encrypted OpenPGP content elements ({@link CryptElement},
- * {@link SigncryptElement}) together.
- */
- public abstract class EncryptedOpenPgpContentElement extends OpenPgpContentElement {
- public static final String ELEM_RPAD = "rpad";
- private final String rpad;
- protected EncryptedOpenPgpContentElement(Set<? extends Jid> to, String rpad, Date timestamp, List<ExtensionElement> payload) {
- super(Objects.requireNonNullNorEmpty(
- to, "Encrypted OpenPGP content elements must have at least one 'to' attribute."),
- timestamp, payload);
- this.rpad = Objects.requireNonNull(rpad);
- }
- protected EncryptedOpenPgpContentElement(Set<? extends Jid> to, List<ExtensionElement> payload) {
- super(Objects.requireNonNullNorEmpty(
- to, "Encrypted OpenPGP content elements must have at least one 'to' attribute."),
- new Date(), payload);
- this.rpad = createRandomPadding();
- }
- private static String createRandomPadding() {
- int len = RandomUtil.nextSecureRandomInt(256);
- return StringUtils.randomString(len);
- }
- @Override
- protected void addCommonXml(XmlStringBuilder xml) {
- super.addCommonXml(xml);
- xml.openElement("rpad").escape(rpad).closeElement("rpad");
- }
- }