--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/trilead/ssh2/packets/TypesReader.java	Thu May 22 10:41:19 2014 -0700
@@ -0,0 +1,153 @@
+
+package com.trilead.ssh2.packets;
+
+import java.io.IOException;
+import java.math.BigInteger;
+
+import com.trilead.ssh2.util.Tokenizer;
+
+
+/**
+ * TypesReader.
+ *
+ * @author Christian Plattner, plattner@trilead.com
+ * @version $Id: TypesReader.java,v 1.2 2008/04/01 12:38:09 cplattne Exp $
+ */
+public class TypesReader {
+    byte[] arr;
+    int pos = 0;
+    int max = 0;
+
+    public TypesReader(byte[] arr) {
+        this.arr = arr;
+        pos = 0;
+        max = arr.length;
+    }
+
+    public TypesReader(byte[] arr, int off) {
+        this.arr = arr;
+        this.pos = off;
+        this.max = arr.length;
+
+        if ((pos < 0) || (pos > arr.length))
+            throw new IllegalArgumentException("Illegal offset.");
+    }
+
+    public TypesReader(byte[] arr, int off, int len) {
+        this.arr = arr;
+        this.pos = off;
+        this.max = off + len;
+
+        if ((pos < 0) || (pos > arr.length))
+            throw new IllegalArgumentException("Illegal offset.");
+
+        if ((max < 0) || (max > arr.length))
+            throw new IllegalArgumentException("Illegal length.");
+    }
+
+    public int readByte() throws IOException {
+        if (pos >= max)
+            throw new IOException("Packet too short.");
+
+        return (arr[pos++] & 0xff);
+    }
+
+    public byte[] readBytes(int len) throws IOException {
+        if ((pos + len) > max)
+            throw new IOException("Packet too short.");
+
+        byte[] res = new byte[len];
+        System.arraycopy(arr, pos, res, 0, len);
+        pos += len;
+        return res;
+    }
+
+    public void readBytes(byte[] dst, int off, int len) throws IOException {
+        if ((pos + len) > max)
+            throw new IOException("Packet too short.");
+
+        System.arraycopy(arr, pos, dst, off, len);
+        pos += len;
+    }
+
+    public boolean readBoolean() throws IOException {
+        if (pos >= max)
+            throw new IOException("Packet too short.");
+
+        return (arr[pos++] != 0);
+    }
+
+    public int readUINT32() throws IOException {
+        if ((pos + 4) > max)
+            throw new IOException("Packet too short.");
+
+        return ((arr[pos++] & 0xff) << 24) | ((arr[pos++] & 0xff) << 16) | ((arr[pos++] & 0xff) << 8)
+               | (arr[pos++] & 0xff);
+    }
+
+    public long readUINT64() throws IOException {
+        if ((pos + 8) > max)
+            throw new IOException("Packet too short.");
+
+        long high = ((arr[pos++] & 0xff) << 24) | ((arr[pos++] & 0xff) << 16) | ((arr[pos++] & 0xff) << 8)
+                    | (arr[pos++] & 0xff); /* sign extension may take place - will be shifted away =) */
+        long low = ((arr[pos++] & 0xff) << 24) | ((arr[pos++] & 0xff) << 16) | ((arr[pos++] & 0xff) << 8)
+                   | (arr[pos++] & 0xff); /* sign extension may take place - handle below */
+        return (high << 32) | (low & 0xffffffffl); /* see Java language spec (15.22.1, 5.6.2) */
+    }
+
+    public BigInteger readMPINT() throws IOException {
+        BigInteger b;
+        byte raw[] = readByteString();
+
+        if (raw.length == 0)
+            b = BigInteger.ZERO;
+        else
+            b = new BigInteger(raw);
+
+        return b;
+    }
+
+    public byte[] readByteString() throws IOException {
+        int len = readUINT32();
+
+        if ((len + pos) > max)
+            throw new IOException("Malformed SSH byte string.");
+
+        byte[] res = new byte[len];
+        System.arraycopy(arr, pos, res, 0, len);
+        pos += len;
+        return res;
+    }
+
+    public String readString(String charsetName) throws IOException {
+        int len = readUINT32();
+
+        if ((len + pos) > max)
+            throw new IOException("Malformed SSH string.");
+
+        String res = (charsetName == null) ? new String(arr, pos, len) : new String(arr, pos, len, charsetName);
+        pos += len;
+        return res;
+    }
+
+    public String readString() throws IOException {
+        int len = readUINT32();
+
+        if ((len + pos) > max)
+            throw new IOException("Malformed SSH string.");
+
+        String res = new String(arr, pos, len, "ISO-8859-1");
+        pos += len;
+        return res;
+    }
+
+    public String[] readNameList() throws IOException {
+        return Tokenizer.parseTokens(readString(), ',');
+    }
+
+    public int remain() {
+        return max - pos;
+    }
+
+}