Add copy implementation from SSH File Transfer Protocol extensions.

ssh/src/main/java/ch/cyberduck/core/sftp/SFTPCopyFeature.java

@@ -0,0 +1,52 @@
+package ch.cyberduck.core.sftp;
+
+/*
+ * Copyright (c) 2002-2023 iterate GmbH. All rights reserved.
+ * https://cyberduck.io/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+import ch.cyberduck.core.ConnectionCallback;
+import ch.cyberduck.core.Path;
+import ch.cyberduck.core.exception.BackgroundException;
+import ch.cyberduck.core.features.Copy;
+import ch.cyberduck.core.io.StreamListener;
+import ch.cyberduck.core.transfer.TransferStatus;
+
+import java.io.IOException;
+
+import net.schmizz.sshj.sftp.PacketType;
+import net.schmizz.sshj.sftp.Request;
+
+public class SFTPCopyFeature implements Copy {
+
+    private final SFTPSession session;
+
+    public SFTPCopyFeature(final SFTPSession session) {
+        this.session = session;
+    }
+
+    @Override
+    public Path copy(final Path source, final Path target, final TransferStatus status, final ConnectionCallback prompt, final StreamListener listener) throws BackgroundException {
+        try {
+            final Request request = session.sftp().newExtendedRequest("copy-file")
+                    .putString(source.getAbsolute())
+                    .putString(target.getAbsolute())
+                    .putBoolean(status.isExists());
+            session.sftp().request(request).retrieve().ensurePacketTypeIs(PacketType.STATUS);
+        }
+        catch(IOException e) {
+            throw new SFTPExceptionMappingService().map("Cannot copy {0}", e, source);
+        }
+        return null;
+    }
+}

ssh/src/main/java/ch/cyberduck/core/sftp/SFTPSession.java

@@ -478,6 +478,9 @@ public <T> T _getFeature(final Class<T> type) {
         if(type == Move.class) {
             return (T) new SFTPMoveFeature(this);
         }
+        if(type == Copy.class) {
+            return (T) new SFTPCopyFeature(this);
+        }
         if(type == UnixPermission.class) {
             return (T) new SFTPUnixPermissionFeature(this);
         }

ssh/src/test/java/ch/cyberduck/core/sftp/SFTPCopyFeatureTest.java

@@ -0,0 +1,46 @@
+package ch.cyberduck.core.sftp;
+
+/*
+ * Copyright (c) 2002-2023 iterate GmbH. All rights reserved.
+ * https://cyberduck.io/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+import ch.cyberduck.core.AlphanumericRandomStringService;
+import ch.cyberduck.core.DisabledConnectionCallback;
+import ch.cyberduck.core.DisabledLoginCallback;
+import ch.cyberduck.core.Path;
+import ch.cyberduck.core.features.Delete;
+import ch.cyberduck.core.io.DisabledStreamListener;
+import ch.cyberduck.core.transfer.TransferStatus;
+
+import org.junit.Test;
+
+import java.util.Collections;
+import java.util.EnumSet;
+
+import static org.junit.Assert.assertTrue;
+
+public class SFTPCopyFeatureTest extends AbstractSFTPTest {
+
+    @Test
+    public void testCopy() throws Exception {
+        final Path test = new Path(new SFTPHomeDirectoryService(session).find(), new AlphanumericRandomStringService().random(), EnumSet.of(Path.Type.file));
+        new SFTPTouchFeature(session).touch(test, new TransferStatus());
+        final Path copy = new Path(new SFTPHomeDirectoryService(session).find(), new AlphanumericRandomStringService().random(), EnumSet.of(Path.Type.file));
+        new SFTPCopyFeature(session).copy(test, copy, new TransferStatus(), new DisabledConnectionCallback(), new DisabledStreamListener());
+        assertTrue(new SFTPFindFeature(session).find(test));
+        assertTrue(new SFTPFindFeature(session).find(copy));
+        new SFTPDeleteFeature(session).delete(Collections.<Path>singletonList(test), new DisabledLoginCallback(), new Delete.DisabledCallback());
+        new SFTPDeleteFeature(session).delete(Collections.<Path>singletonList(copy), new DisabledLoginCallback(), new Delete.DisabledCallback());
+    }
+}