--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/ch/ethz/ssh2/SFTPException.java	Thu Dec 03 11:23:55 2015 -0800
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
+ * Please see the LICENSE.txt for licensing details.
+ */
+package ch.ethz.ssh2;
+
+import java.io.IOException;
+
+import ch.ethz.ssh2.sftp.ErrorCodes;
+
+/**
+ * Used in combination with the SFTPv3Client. This exception wraps
+ * error messages sent by the SFTP server.
+ *
+ * @author Christian Plattner
+ * @version 2.50, 03/15/10
+ */
+
+public class SFTPException extends IOException {
+    private static final long serialVersionUID = 578654644222421811L;
+
+    private final String sftpErrorMessage;
+    private final int sftpErrorCode;
+
+    private static String constructMessage(String s, int errorCode) {
+        String[] detail = ErrorCodes.getDescription(errorCode);
+
+        if (detail == null)
+            return s + " (UNKNOWN SFTP ERROR CODE)";
+
+        return s + " (" + detail[0] + ": " + detail[1] + ")";
+    }
+
+    SFTPException(String msg, int errorCode) {
+        super(constructMessage(msg, errorCode));
+        sftpErrorMessage = msg;
+        sftpErrorCode = errorCode;
+    }
+
+    /**
+     * Get the error message sent by the server. Often, this
+     * message does not help a lot (e.g., "failure").
+     *
+     * @return the plain string as sent by the server.
+     */
+    public String getServerErrorMessage() {
+        return sftpErrorMessage;
+    }
+
+    /**
+     * Get the error code sent by the server.
+     *
+     * @return an error code as defined in the SFTP specs.
+     */
+    public int getServerErrorCode() {
+        return sftpErrorCode;
+    }
+
+    /**
+     * Get the symbolic name of the error code as given in the SFTP specs.
+     *
+     * @return e.g., "SSH_FX_INVALID_FILENAME".
+     */
+    public String getServerErrorCodeSymbol() {
+        String[] detail = ErrorCodes.getDescription(sftpErrorCode);
+
+        if (detail == null)
+            return "UNKNOWN SFTP ERROR CODE " + sftpErrorCode;
+
+        return detail[0];
+    }
+
+    /**
+     * Get the description of the error code as given in the SFTP specs.
+     *
+     * @return e.g., "The filename is not valid."
+     */
+    public String getServerErrorCodeVerbose() {
+        String[] detail = ErrorCodes.getDescription(sftpErrorCode);
+
+        if (detail == null)
+            return "The error code " + sftpErrorCode + " is unknown.";
+
+        return detail[1];
+    }
+}