--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/ch/ethz/ssh2/SFTPv3FileAttributes.java	Thu Dec 03 11:23:55 2015 -0800
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
+ * Please refer to the LICENSE.txt for licensing details.
+ */
+package ch.ethz.ssh2;
+
+import java.io.IOException;
+
+import ch.ethz.ssh2.packets.TypesReader;
+import ch.ethz.ssh2.packets.TypesWriter;
+import ch.ethz.ssh2.sftp.AttribFlags;
+
+/**
+ * A <code>SFTPv3FileAttributes</code> object represents detail information
+ * about a file on the server. Not all fields may/must be present.
+ *
+ * @author Christian Plattner, plattner@inf.ethz.ch
+ * @version $Id: SFTPv3FileAttributes.java 133 2014-04-14 12:26:29Z dkocher@sudo.ch $
+ */
+public class SFTPv3FileAttributes implements SFTPFileAttributes {
+    /**
+     * The SIZE attribute. <code>NULL</code> if not present.
+     */
+    public Long size = null;
+
+    /**
+     * The UID attribute. <code>NULL</code> if not present.
+     */
+    public Integer uid = null;
+
+    /**
+     * The GID attribute. <code>NULL</code> if not present.
+     */
+    public Integer gid = null;
+
+    /**
+     * The POSIX permissions. <code>NULL</code> if not present.
+     * <p/>
+     * Here is a list:
+     * <p/>
+     * <pre>Note: these numbers are all OCTAL.
+     * <p/>
+     *  S_IFMT     0170000   bitmask for the file type bitfields
+     *  S_IFSOCK   0140000   socket
+     *  S_IFLNK    0120000   symbolic link
+     *  S_IFREG    0100000   regular file
+     *  S_IFBLK    0060000   block device
+     *  S_IFDIR    0040000   directory
+     *  S_IFCHR    0020000   character device
+     *  S_IFIFO    0010000   fifo
+     *  S_ISUID    0004000   set UID bit
+     *  S_ISGID    0002000   set GID bit
+     *  S_ISVTX    0001000   sticky bit
+     * <p/>
+     *  S_IRWXU    00700     mask for file owner permissions
+     *  S_IRUSR    00400     owner has read permission
+     *  S_IWUSR    00200     owner has write permission
+     *  S_IXUSR    00100     owner has execute permission
+     *  S_IRWXG    00070     mask for group permissions
+     *  S_IRGRP    00040     group has read permission
+     *  S_IWGRP    00020     group has write permission
+     *  S_IXGRP    00010     group has execute permission
+     *  S_IRWXO    00007     mask for permissions for others (not in group)
+     *  S_IROTH    00004     others have read permission
+     *  S_IWOTH    00002     others have write permisson
+     *  S_IXOTH    00001     others have execute permission
+     * </pre>
+     */
+    public Integer permissions = null;
+
+    /**
+     * Last access time of the file.
+     * <p/>
+     * The atime attribute. Represented as seconds from Jan 1, 1970 in UTC.
+     * <code>NULL</code> if not present.
+     */
+    public Integer atime = null;
+
+    /**
+     * The mtime attribute. Represented as seconds from Jan 1, 1970 in UTC.
+     * <code>NULL</code> if not present.
+     */
+    public Integer mtime = null;
+
+    /**
+     * Checks if this entry is a directory.
+     *
+     * @return Returns true if permissions are available and they indicate
+     * that this entry represents a directory.
+     */
+    public boolean isDirectory() {
+        if (permissions == null) {
+            return false;
+        }
+
+        return ((permissions & 0040000) == 0040000);
+    }
+
+    /**
+     * Checks if this entry is a regular file.
+     *
+     * @return Returns true if permissions are available and they indicate
+     * that this entry represents a regular file.
+     */
+    public boolean isRegularFile() {
+        if (permissions == null) {
+            return false;
+        }
+
+        return ((permissions & 0100000) == 0100000);
+    }
+
+    /**
+     * Checks if this entry is a a symlink.
+     *
+     * @return Returns true if permissions are available and they indicate
+     * that this entry represents a symlink.
+     */
+    public boolean isSymlink() {
+        if (permissions == null) {
+            return false;
+        }
+
+        return ((permissions & 0120000) == 0120000);
+    }
+
+    /**
+     * Turn the POSIX permissions into a 7 digit octal representation.
+     * Note: the returned value is first masked with <code>0177777</code>.
+     *
+     * @return <code>NULL</code> if permissions are not available.
+     */
+    public String getOctalPermissions() {
+        if (permissions == null) {
+            return null;
+        }
+
+        String res = Integer.toString(permissions.intValue() & 0177777, 8);
+        StringBuilder sb = new StringBuilder();
+        int leadingZeros = 7 - res.length();
+
+        while (leadingZeros > 0) {
+            sb.append('0');
+            leadingZeros--;
+        }
+
+        sb.append(res);
+        return sb.toString();
+    }
+
+    public SFTPv3FileAttributes() {
+        //
+    }
+
+    /**
+     * uint32   valid-attribute-flags
+     * byte     type                   always present
+     * uint64   size                   if flag SIZE
+     * uint64   allocation-size        if flag ALLOCATION_SIZE
+     * string   owner                  if flag OWNERGROUP
+     * string   group                  if flag OWNERGROUP
+     * uint32   permissions            if flag PERMISSIONS
+     * int64    atime                  if flag ACCESSTIME
+     * uint32   atime-nseconds            if flag SUBSECOND_TIMES
+     * int64    createtime             if flag CREATETIME
+     * uint32   createtime-nseconds       if flag SUBSECOND_TIMES
+     * int64    mtime                  if flag MODIFYTIME
+     * uint32   mtime-nseconds            if flag SUBSECOND_TIMES
+     * int64    ctime                  if flag CTIME
+     * uint32   ctime-nseconds            if flag SUBSECOND_TIMES
+     * string   acl                    if flag ACL
+     * uint32   attrib-bits            if flag BITS
+     * uint32   attrib-bits-valid      if flag BITS
+     * byte     text-hint              if flag TEXT_HINT
+     * string   mime-type              if flag MIME_TYPE
+     * uint32   link-count             if flag LINK_COUNT
+     * string   untranslated-name      if flag UNTRANSLATED_NAME
+     * uint32   extended-count         if flag EXTENDED
+     * extension-pair extensions
+     */
+    public SFTPv3FileAttributes(final TypesReader tr) throws IOException {
+        int flags = tr.readUINT32();
+
+        if ((flags & AttribFlags.SSH_FILEXFER_ATTR_SIZE) != 0) {
+            this.size = tr.readUINT64();
+        }
+
+        if ((flags & AttribFlags.SSH_FILEXFER_ATTR_V3_UIDGID) != 0) {
+            this.uid = tr.readUINT32();
+            this.gid = tr.readUINT32();
+        }
+
+        if ((flags & AttribFlags.SSH_FILEXFER_ATTR_PERMISSIONS) != 0) {
+            this.permissions = tr.readUINT32();
+        }
+
+        if ((flags & AttribFlags.SSH_FILEXFER_ATTR_V3_ACMODTIME) != 0) {
+            this.atime = tr.readUINT32();
+            this.mtime = tr.readUINT32();
+        }
+
+        if ((flags & AttribFlags.SSH_FILEXFER_ATTR_EXTENDED) != 0) {
+            int count = tr.readUINT32();
+
+            // Read it anyway to detect corrupt packets
+            while (count > 0) {
+                tr.readByteString();
+                tr.readByteString();
+                count--;
+            }
+        }
+    }
+
+    /**
+     * The same encoding is used both when returning file
+     * attributes from the server and when sending file attributes to the
+     * server.
+     *
+     * @return Encoded attributes
+     */
+    public byte[] toBytes() {
+        TypesWriter tw = new TypesWriter();
+        int attrFlags = 0;
+
+        if (this.size != null) {
+            attrFlags = attrFlags | AttribFlags.SSH_FILEXFER_ATTR_SIZE;
+        }
+
+        if ((this.uid != null) && (this.gid != null)) {
+            attrFlags = attrFlags | AttribFlags.SSH_FILEXFER_ATTR_V3_UIDGID;
+        }
+
+        if (this.permissions != null) {
+            attrFlags = attrFlags | AttribFlags.SSH_FILEXFER_ATTR_PERMISSIONS;
+        }
+
+        if ((this.atime != null) && (this.mtime != null)) {
+            attrFlags = attrFlags | AttribFlags.SSH_FILEXFER_ATTR_V3_ACMODTIME;
+        }
+
+        tw.writeUINT32(attrFlags);
+
+        if (this.size != null) {
+            tw.writeUINT64(this.size);
+        }
+
+        if ((this.uid != null) && (this.gid != null)) {
+            tw.writeUINT32(this.uid);
+            tw.writeUINT32(this.gid);
+        }
+
+        if (this.permissions != null) {
+            tw.writeUINT32(this.permissions);
+        }
+
+        if ((this.atime != null) && (this.mtime != null)) {
+            tw.writeUINT32(this.atime);
+            tw.writeUINT32(this.mtime);
+        }
+
+        return tw.getBytes();
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("SFTPv3FileAttributes{");
+        sb.append("size=").append(size);
+        sb.append(", uid=").append(uid);
+        sb.append(", gid=").append(gid);
+        sb.append(", permissions=").append(permissions);
+        sb.append(", atime=").append(atime);
+        sb.append(", mtime=").append(mtime);
+        sb.append('}');
+        return sb.toString();
+    }
+}
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