Add first JET classes

smack-experimental/src/main/java/org/jivesoftware/smackx/jingle_encrypted_transfer/JingleEncryptedTransferManager.java

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+package org.jivesoftware.smackx.jingle_encrypted_transfer;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.WeakHashMap;
+
+import org.jivesoftware.smack.Manager;
+import org.jivesoftware.smack.XMPPConnection;
+
+/**
+ * Created by vanitas on 13.07.17.
+ */
+public class JingleEncryptedTransferManager extends Manager {
+
+    public static final String NAMESPACE = "urn:xmpp:jingle:jet:0";
+
+    private static final WeakHashMap<XMPPConnection, JingleEncryptedTransferManager> INSTANCES = new WeakHashMap<>();
+
+    private static final Map<String, JingleEncryptionMethod> encryptionProviders = new HashMap<>();
+
+    private JingleEncryptedTransferManager(XMPPConnection connection) {
+        super(connection);
+    }
+
+    public static JingleEncryptedTransferManager getInstanceFor(XMPPConnection connection) {
+        JingleEncryptedTransferManager manager = INSTANCES.get(connection);
+
+        if (manager == null) {
+            manager = new JingleEncryptedTransferManager(connection);
+            INSTANCES.put(connection, manager);
+        }
+
+        return manager;
+    }
+
+
+    public void registerEncryptionProvider(String namespace, JingleEncryptionMethod provider) {
+        encryptionProviders.put(namespace, provider);
+    }
+
+    public void unregisterEncryptionProvider(String namespace) {
+        encryptionProviders.remove(namespace);
+    }
+
+    public JingleEncryptionMethod getEncryptionProvider(String namespace) {
+        return encryptionProviders.get(namespace);
+    }
+}

smack-experimental/src/main/java/org/jivesoftware/smackx/jingle_encrypted_transfer/JingleEncryptionMethod.java

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+/**
+ *
+ * Copyright 2017 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.jingle_encrypted_transfer;
+
+import java.security.NoSuchAlgorithmException;
+
+import org.jivesoftware.smack.SmackException;
+import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smack.packet.ExtensionElement;
+import org.jivesoftware.smack.provider.ExtensionElementProvider;
+
+import org.jxmpp.jid.FullJid;
+
+/**
+ * Created by vanitas on 13.07.17.
+ */
+public interface JingleEncryptionMethod {
+
+    ExtensionElement encryptJingleTransfer(FullJid recipient, byte[] keyData) throws JingleEncryptionException, InterruptedException, NoSuchAlgorithmException, SmackException.NotConnectedException, SmackException.NoResponseException;
+
+    byte[] decryptJingleTransfer(FullJid sender, ExtensionElement encryptionElement) throws JingleEncryptionException, InterruptedException, XMPPException.XMPPErrorException, SmackException.NotConnectedException, SmackException.NoResponseException;
+
+    ExtensionElementProvider<ExtensionElement> getEncryptionElementProvider();
+
+    class JingleEncryptionException extends Exception {
+        public JingleEncryptionException(Throwable throwable) {
+            super(throwable);
+        }
+    }
+}

smack-experimental/src/main/java/org/jivesoftware/smackx/jingle_encrypted_transfer/JingleEncryptionMethodManager.java

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+package org.jivesoftware.smackx.jingle_encrypted_transfer;
+
+import java.util.HashMap;
+
+import org.jivesoftware.smack.packet.ExtensionElement;
+import org.jivesoftware.smack.provider.ExtensionElementProvider;
+
+/**
+ * Created by vanitas on 13.07.17.
+ */
+public class JingleEncryptionMethodManager {
+
+    public static HashMap<String, ExtensionElementProvider<ExtensionElement>> securityKeyTransportProviders = new HashMap<>();
+
+    private JingleEncryptionMethodManager() {
+        // $(man true)
+    }
+
+    public static void registerSecurityKeyTransportProvider(String namespace, ExtensionElementProvider<ExtensionElement> provider) {
+        securityKeyTransportProviders.put(namespace, provider);
+    }
+
+    public static ExtensionElementProvider<ExtensionElement> getSecurityKeyTransportProvider(String namespace) {
+        return securityKeyTransportProviders.get(namespace);
+    }
+}

smack-experimental/src/main/java/org/jivesoftware/smackx/jingle_encrypted_transfer/element/SecurityElement.java

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+package org.jivesoftware.smackx.jingle_encrypted_transfer.element;
+
+import org.jivesoftware.smack.packet.ExtensionElement;
+import org.jivesoftware.smack.util.XmlStringBuilder;
+import org.jivesoftware.smackx.jingle_encrypted_transfer.JingleEncryptedTransferManager;
+
+/**
+ * Created by vanitas on 13.07.17.
+ */
+public class SecurityElement implements ExtensionElement {
+    public static final String ELEMENT = "security";
+    public static final String ATTR_NAME = "name";
+    public static final String ATTR_TYPE = "type";
+
+    private final ExtensionElement child;
+    private final String name;
+
+    public SecurityElement(String name, ExtensionElement child) {
+        this.name = name;
+        this.child = child;
+    }
+
+    @Override
+    public String getElementName() {
+        return ELEMENT;
+    }
+
+    @Override
+    public CharSequence toXML() {
+        XmlStringBuilder xml = new XmlStringBuilder(this);
+        xml.attribute(ATTR_NAME, name).attribute(ATTR_TYPE, child.getNamespace());
+        xml.rightAngleBracket();
+        xml.element(child);
+        xml.closeElement(this);
+        return xml;
+    }
+
+    @Override
+    public String getNamespace() {
+        return JingleEncryptedTransferManager.NAMESPACE;
+    }
+}

smack-experimental/src/main/java/org/jivesoftware/smackx/jingle_encrypted_transfer/provider/SecurityProvider.java

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+package org.jivesoftware.smackx.jingle_encrypted_transfer.provider;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.jivesoftware.smack.packet.ExtensionElement;
+import org.jivesoftware.smack.provider.ExtensionElementProvider;
+import org.jivesoftware.smack.util.Objects;
+import org.jivesoftware.smackx.jingle_encrypted_transfer.JingleEncryptedTransferManager;
+import org.jivesoftware.smackx.jingle_encrypted_transfer.JingleEncryptionMethodManager;
+import org.jivesoftware.smackx.jingle_encrypted_transfer.element.SecurityElement;
+
+import org.xmlpull.v1.XmlPullParser;
+
+/**
+ * Created by vanitas on 13.07.17.
+ */
+public class SecurityProvider extends ExtensionElementProvider<SecurityElement> {
+    private static final Logger LOGGER = Logger.getLogger(SecurityProvider.class.getName());
+
+    @Override
+    public SecurityElement parse(XmlPullParser parser, int initialDepth) throws Exception {
+        String name = parser.getAttributeValue(JingleEncryptedTransferManager.NAMESPACE, SecurityElement.ATTR_NAME);
+        String type = parser.getAttributeValue(JingleEncryptedTransferManager.NAMESPACE, SecurityElement.ATTR_TYPE);
+        ExtensionElement child;
+
+        Objects.requireNonNull(type);
+
+        ExtensionElementProvider<ExtensionElement> encryptionElementProvider =
+                JingleEncryptionMethodManager.getSecurityKeyTransportProvider(type);
+
+        if (encryptionElementProvider != null) {
+            child = encryptionElementProvider.parse(parser);
+        } else {
+            LOGGER.log(Level.WARNING, "Unknown child element in SecurityElement: " + type);
+            return null;
+        }
+
+        return new SecurityElement(name, child);
+    }
+}