OpenPgpElement.java
- /**
- *
- * Copyright 2017-2020 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.io.ByteArrayInputStream;
- import java.io.InputStream;
- import javax.xml.namespace.QName;
- import org.jivesoftware.smack.packet.ExtensionElement;
- import org.jivesoftware.smack.packet.Stanza;
- import org.jivesoftware.smack.util.StringUtils;
- import org.jivesoftware.smack.util.XmlStringBuilder;
- import org.jivesoftware.smack.util.stringencoder.Base64;
- import org.jivesoftware.smackx.ox.util.Util;
- /**
- * Class that represents an OpenPGP message.
- * The content of this elements text is an base64 encoded , OpenPGP encrypted/signed content element ({@link SignElement},
- * {@link SigncryptElement}, {@link CryptElement}).
- *
- * @see <a href="https://xmpp.org/extensions/xep-0373.html#exchange">
- * XEP-0373: ยง3.1 Exchanging OpenPGP Encrypted and Signed Data</a>
- */
- public class OpenPgpElement implements ExtensionElement {
- public static final String ELEMENT = "openpgp";
- public static final String NAMESPACE = "urn:xmpp:openpgp:0";
- public static final QName QNAME = new QName(NAMESPACE, ELEMENT);
- // Represents the OpenPGP message, but encoded using base64.
- private final String base64EncodedOpenPgpMessage;
- public OpenPgpElement(String base64EncodedOpenPgpMessage) {
- this.base64EncodedOpenPgpMessage = StringUtils.requireNotNullNorEmpty(base64EncodedOpenPgpMessage,
- "base64 encoded message MUST NOT be null nor empty.");
- }
- public InputStream toInputStream() {
- return new ByteArrayInputStream(
- Base64.decode(base64EncodedOpenPgpMessage.getBytes(Util.UTF8)));
- }
- /**
- * Return the OpenPGP encrypted payload.
- *
- * @return OpenPGP encrypted payload.
- */
- public String getEncryptedBase64MessageContent() {
- return base64EncodedOpenPgpMessage;
- }
- @Override
- public String getElementName() {
- return ELEMENT;
- }
- @Override
- public String getNamespace() {
- return NAMESPACE;
- }
- @Override
- public QName getQName() {
- return QNAME;
- }
- @Override
- public XmlStringBuilder toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
- XmlStringBuilder xml = new XmlStringBuilder(this);
- xml.rightAngleBracket().append(base64EncodedOpenPgpMessage).closeElement(this);
- return xml;
- }
- public static OpenPgpElement fromStanza(Stanza stanza) {
- return stanza.getExtension(OpenPgpElement.class);
- }
- }