94 lines
3.0 KiB
Java
94 lines
3.0 KiB
Java
/**
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*
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* Copyright 2017-2020 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.io.ByteArrayInputStream;
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import java.io.InputStream;
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import javax.xml.namespace.QName;
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import org.jivesoftware.smack.packet.ExtensionElement;
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import org.jivesoftware.smack.packet.Stanza;
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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.jivesoftware.smack.util.stringencoder.Base64;
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import org.jivesoftware.smackx.ox.util.Util;
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/**
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* Class that represents an OpenPGP message.
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* The content of this elements text is an base64 encoded , OpenPGP encrypted/signed content element ({@link SignElement},
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* {@link SigncryptElement}, {@link CryptElement}).
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#exchange">
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* XEP-0373: §3.1 Exchanging OpenPGP Encrypted and Signed Data</a>
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*/
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public class OpenPgpElement implements ExtensionElement {
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public static final String ELEMENT = "openpgp";
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public static final String NAMESPACE = "urn:xmpp:openpgp:0";
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public static final QName QNAME = new QName(NAMESPACE, ELEMENT);
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// Represents the OpenPGP message, but encoded using base64.
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private final String base64EncodedOpenPgpMessage;
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public OpenPgpElement(String base64EncodedOpenPgpMessage) {
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this.base64EncodedOpenPgpMessage = StringUtils.requireNotNullNorEmpty(base64EncodedOpenPgpMessage,
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"base64 encoded message MUST NOT be null nor empty.");
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}
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public InputStream toInputStream() {
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return new ByteArrayInputStream(
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Base64.decode(base64EncodedOpenPgpMessage.getBytes(Util.UTF8)));
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}
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/**
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* Return the OpenPGP encrypted payload.
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*
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* @return OpenPGP encrypted payload.
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*/
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public String getEncryptedBase64MessageContent() {
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return base64EncodedOpenPgpMessage;
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}
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@Override
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public String getElementName() {
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return ELEMENT;
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}
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@Override
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public String getNamespace() {
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return NAMESPACE;
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}
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@Override
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public QName getQName() {
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return QNAME;
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}
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@Override
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public XmlStringBuilder toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
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XmlStringBuilder xml = new XmlStringBuilder(this);
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xml.rightAngleBracket().append(base64EncodedOpenPgpMessage).closeElement(this);
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return xml;
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}
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public static OpenPgpElement fromStanza(Stanza stanza) {
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return stanza.getExtension(OpenPgpElement.class);
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}
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}
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