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