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333 lines
7.8 KiB
333 lines
7.8 KiB
// This code is derived from jcifs smb client library <jcifs at samba dot org>
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// Ported by J. Arturo <webmaster at komodosoft dot net>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.IO;
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using SharpCifs.Dcerpc.Ndr;
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using SharpCifs.Smb;
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using SharpCifs.Util.Sharpen;
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namespace SharpCifs.Dcerpc
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{
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public abstract class DcerpcHandle
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{
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/// <exception cref="SharpCifs.Dcerpc.DcerpcException"></exception>
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protected internal static DcerpcBinding ParseBinding(string str)
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{
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int state;
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int mark;
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int si;
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char[] arr = str.ToCharArray();
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string proto = null;
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string key = null;
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DcerpcBinding binding = null;
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state = mark = si = 0;
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do
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{
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char ch = arr[si];
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switch (state)
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{
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case 0:
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{
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if (ch == ':')
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{
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proto = Runtime.Substring(str, mark, si);
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mark = si + 1;
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state = 1;
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}
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break;
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}
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case 1:
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{
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if (ch == '\\')
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{
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mark = si + 1;
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break;
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}
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state = 2;
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goto case 2;
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}
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case 2:
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{
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if (ch == '[')
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{
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string server = Runtime.Substring(str, mark, si).Trim();
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if (server.Length == 0)
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{
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server = "127.0.0.1";
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}
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binding = new DcerpcBinding(proto, Runtime.Substring(str, mark, si));
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mark = si + 1;
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state = 5;
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}
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break;
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}
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case 5:
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{
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if (ch == '=')
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{
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key = Runtime.Substring(str, mark, si).Trim();
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mark = si + 1;
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}
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else
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{
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if (ch == ',' || ch == ']')
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{
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string val = Runtime.Substring(str, mark, si).Trim();
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if (key == null)
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{
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key = "endpoint";
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}
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binding.SetOption(key, val);
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key = null;
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}
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}
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break;
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}
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default:
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{
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si = arr.Length;
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break;
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}
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}
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si++;
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}
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while (si < arr.Length);
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if (binding == null || binding.Endpoint == null)
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{
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throw new DcerpcException("Invalid binding URL: " + str);
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}
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return binding;
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}
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protected internal DcerpcBinding Binding;
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protected internal int MaxXmit = 4280;
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protected internal int MaxRecv;
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protected internal int State;
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protected internal IDcerpcSecurityProvider SecurityProvider;
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private static int _callId = 1;
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/// <exception cref="UnknownHostException"></exception>
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/// <exception cref="System.UriFormatException"></exception>
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/// <exception cref="SharpCifs.Dcerpc.DcerpcException"></exception>
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public static DcerpcHandle GetHandle(string url, NtlmPasswordAuthentication auth)
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{
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if (url.StartsWith("ncacn_np:"))
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{
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return new DcerpcPipeHandle(url, auth);
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}
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throw new DcerpcException("DCERPC transport not supported: " + url);
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}
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/// <exception cref="SharpCifs.Dcerpc.DcerpcException"></exception>
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/// <exception cref="System.IO.IOException"></exception>
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public virtual void Bind()
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{
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lock (this)
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{
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try
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{
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State = 1;
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DcerpcMessage bind = new DcerpcBind(Binding, this);
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Sendrecv(bind);
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}
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catch (IOException ioe)
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{
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State = 0;
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throw;
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}
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}
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}
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/// <exception cref="SharpCifs.Dcerpc.DcerpcException"></exception>
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/// <exception cref="System.IO.IOException"></exception>
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public virtual void Sendrecv(DcerpcMessage msg)
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{
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byte[] stub;
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byte[] frag;
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NdrBuffer buf;
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NdrBuffer fbuf;
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bool isLast;
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bool isDirect;
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DcerpcException de;
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if (State == 0)
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{
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Bind();
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}
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isDirect = true;
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stub = BufferCache.GetBuffer();
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try
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{
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int off;
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int tot;
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int n;
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buf = new NdrBuffer(stub, 0);
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msg.Flags = DcerpcConstants.DcerpcFirstFrag | DcerpcConstants.DcerpcLastFrag;
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msg.CallId = _callId++;
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msg.Encode(buf);
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if (SecurityProvider != null)
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{
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buf.SetIndex(0);
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SecurityProvider.Wrap(buf);
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}
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tot = buf.GetLength() - 24;
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off = 0;
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while (off < tot)
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{
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n = tot - off;
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if ((24 + n) > MaxXmit)
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{
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msg.Flags &= ~DcerpcConstants.DcerpcLastFrag;
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n = MaxXmit - 24;
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}
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else
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{
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msg.Flags |= DcerpcConstants.DcerpcLastFrag;
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isDirect = false;
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msg.AllocHint = n;
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}
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msg.Length = 24 + n;
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if (off > 0)
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{
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msg.Flags &= ~DcerpcConstants.DcerpcFirstFrag;
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}
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if ((msg.Flags & (DcerpcConstants.DcerpcFirstFrag | DcerpcConstants.DcerpcLastFrag)) != (DcerpcConstants.DcerpcFirstFrag |
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DcerpcConstants.DcerpcLastFrag))
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{
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buf.Start = off;
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buf.Reset();
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msg.Encode_header(buf);
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buf.Enc_ndr_long(msg.AllocHint);
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buf.Enc_ndr_short(0);
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buf.Enc_ndr_short(msg.GetOpnum());
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}
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DoSendFragment(stub, off, msg.Length, isDirect);
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off += n;
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}
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DoReceiveFragment(stub, isDirect);
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buf.Reset();
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buf.SetIndex(8);
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buf.SetLength(buf.Dec_ndr_short());
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if (SecurityProvider != null)
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{
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SecurityProvider.Unwrap(buf);
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}
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buf.SetIndex(0);
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msg.Decode_header(buf);
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off = 24;
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if (msg.Ptype == 2 && msg.IsFlagSet(DcerpcConstants.DcerpcLastFrag) == false)
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{
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off = msg.Length;
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}
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frag = null;
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fbuf = null;
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while (msg.IsFlagSet(DcerpcConstants.DcerpcLastFrag) == false)
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{
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int stubFragLen;
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if (frag == null)
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{
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frag = new byte[MaxRecv];
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fbuf = new NdrBuffer(frag, 0);
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}
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DoReceiveFragment(frag, isDirect);
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fbuf.Reset();
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fbuf.SetIndex(8);
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fbuf.SetLength(fbuf.Dec_ndr_short());
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if (SecurityProvider != null)
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{
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SecurityProvider.Unwrap(fbuf);
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}
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fbuf.Reset();
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msg.Decode_header(fbuf);
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stubFragLen = msg.Length - 24;
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if ((off + stubFragLen) > stub.Length)
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{
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// shouldn't happen if alloc_hint is correct or greater
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byte[] tmp = new byte[off + stubFragLen];
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Array.Copy(stub, 0, tmp, 0, off);
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stub = tmp;
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}
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Array.Copy(frag, 24, stub, off, stubFragLen);
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off += stubFragLen;
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}
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buf = new NdrBuffer(stub, 0);
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msg.Decode(buf);
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}
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finally
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{
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BufferCache.ReleaseBuffer(stub);
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}
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if ((de = msg.GetResult()) != null)
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{
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throw de;
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}
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}
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public virtual void SetDcerpcSecurityProvider(IDcerpcSecurityProvider securityProvider
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)
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{
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this.SecurityProvider = securityProvider;
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}
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public virtual string GetServer()
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{
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if (this is DcerpcPipeHandle)
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{
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return ((DcerpcPipeHandle)this).Pipe.GetServer();
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}
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return null;
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}
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public virtual Principal GetPrincipal()
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{
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if (this is DcerpcPipeHandle)
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{
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return ((DcerpcPipeHandle)this).Pipe.GetPrincipal();
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}
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return null;
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}
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public override string ToString()
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{
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return Binding.ToString();
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}
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/// <exception cref="System.IO.IOException"></exception>
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protected internal abstract void DoSendFragment(byte[] buf, int off, int length,
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bool isDirect);
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/// <exception cref="System.IO.IOException"></exception>
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protected internal abstract void DoReceiveFragment(byte[] buf, bool isDirect);
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/// <exception cref="System.IO.IOException"></exception>
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public abstract void Close();
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public DcerpcHandle()
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{
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MaxRecv = MaxXmit;
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}
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}
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}
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