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- /* Copyright (C) 2014-2017 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
- *
- * You can redistribute this program and/or modify it under the terms of
- * the GNU Lesser Public License as published by the Free Software Foundation,
- * either version 3 of the License, or (at your option) any later version.
- */
- using System;
- using System.Collections.Generic;
- using SMBLibrary.NetBios;
- using SMBLibrary.Server.SMB1;
- using SMBLibrary.SMB1;
- using Utilities;
- namespace SMBLibrary.Server
- {
- public partial class SMBServer
- {
- public void ProcessSMB1Message(SMB1Message message, ref ConnectionState state)
- {
- SMB1Message reply = new SMB1Message();
- PrepareResponseHeader(reply, message);
- List<SMB1Command> sendQueue = new List<SMB1Command>();
- foreach (SMB1Command command in message.Commands)
- {
- SMB1Command response = ProcessSMB1Command(reply.Header, command, ref state, sendQueue);
- if (response != null)
- {
- reply.Commands.Add(response);
- }
- if (reply.Header.Status != NTStatus.STATUS_SUCCESS)
- {
- break;
- }
- }
- if (reply.Commands.Count > 0)
- {
- TrySendMessage(state, reply);
- foreach (SMB1Command command in sendQueue)
- {
- SMB1Message secondaryReply = new SMB1Message();
- secondaryReply.Header = reply.Header;
- secondaryReply.Commands.Add(command);
- TrySendMessage(state, secondaryReply);
- }
- }
- }
- /// <summary>
- /// May return null
- /// </summary>
- public SMB1Command ProcessSMB1Command(SMB1Header header, SMB1Command command, ref ConnectionState state, List<SMB1Command> sendQueue)
- {
- if (state.ServerDialect == SMBDialect.NotSet)
- {
- if (command is NegotiateRequest)
- {
- NegotiateRequest request = (NegotiateRequest)command;
- if (request.Dialects.Contains(SMBServer.NTLanManagerDialect))
- {
- state = new SMB1ConnectionState(state);
- state.ServerDialect = SMBDialect.NTLM012;
- if (EnableExtendedSecurity && header.ExtendedSecurityFlag)
- {
- return NegotiateHelper.GetNegotiateResponseExtended(request, m_serverGuid);
- }
- else
- {
- return NegotiateHelper.GetNegotiateResponse(header, request, m_users);
- }
- }
- else
- {
- return new NegotiateResponseNotSupported();
- }
- }
- else
- {
- // [MS-CIFS] An SMB_COM_NEGOTIATE exchange MUST be completed before any other SMB messages are sent to the server
- header.Status = NTStatus.STATUS_INVALID_SMB;
- return new ErrorResponse(command.CommandName);
- }
- }
- else if (command is NegotiateRequest)
- {
- // There MUST be only one SMB_COM_NEGOTIATE exchange per SMB connection.
- // Subsequent SMB_COM_NEGOTIATE requests received by the server MUST be rejected with error responses.
- header.Status = NTStatus.STATUS_INVALID_SMB;
- return new ErrorResponse(command.CommandName);
- }
- else
- {
- return ProcessSMB1Command(header, command, (SMB1ConnectionState)state, sendQueue);
- }
- }
- private SMB1Command ProcessSMB1Command(SMB1Header header, SMB1Command command, SMB1ConnectionState state, List<SMB1Command> sendQueue)
- {
- if (command is SessionSetupAndXRequest)
- {
- SessionSetupAndXRequest request = (SessionSetupAndXRequest)command;
- state.MaxBufferSize = request.MaxBufferSize;
- return SessionSetupHelper.GetSessionSetupResponse(header, request, m_users, state);
- }
- else if (command is SessionSetupAndXRequestExtended)
- {
- SessionSetupAndXRequestExtended request = (SessionSetupAndXRequestExtended)command;
- state.MaxBufferSize = request.MaxBufferSize;
- return SessionSetupHelper.GetSessionSetupResponseExtended(header, request, m_users, state);
- }
- else if (command is EchoRequest)
- {
- return ServerResponseHelper.GetEchoResponse((EchoRequest)command, sendQueue);
- }
- else
- {
- SMB1Session session = state.GetSession(header.UID);
- if (session == null)
- {
- header.Status = NTStatus.STATUS_USER_SESSION_DELETED;
- return new ErrorResponse(command.CommandName);
- }
- if (command is TreeConnectAndXRequest)
- {
- TreeConnectAndXRequest request = (TreeConnectAndXRequest)command;
- return TreeConnectHelper.GetTreeConnectResponse(header, request, state, m_services, m_shares);
- }
- else if (command is LogoffAndXRequest)
- {
- state.RemoveSession(header.UID);
- return new LogoffAndXResponse();
- }
- else
- {
- ISMBShare share = session.GetConnectedTree(header.TID);
- if (share == null)
- {
- header.Status = NTStatus.STATUS_SMB_BAD_TID;
- return new ErrorResponse(command.CommandName);
- }
- if (command is CreateDirectoryRequest)
- {
- CreateDirectoryRequest request = (CreateDirectoryRequest)command;
- return FileStoreResponseHelper.GetCreateDirectoryResponse(header, request, share, state);
- }
- else if (command is DeleteDirectoryRequest)
- {
- DeleteDirectoryRequest request = (DeleteDirectoryRequest)command;
- return FileStoreResponseHelper.GetDeleteDirectoryResponse(header, request, share, state);
- }
- else if (command is CloseRequest)
- {
- CloseRequest request = (CloseRequest)command;
- return ServerResponseHelper.GetCloseResponse(header, request, share, state);
- }
- else if (command is FlushRequest)
- {
- return new FlushResponse();
- }
- else if (command is DeleteRequest)
- {
- DeleteRequest request = (DeleteRequest)command;
- return FileStoreResponseHelper.GetDeleteResponse(header, request, share, state);
- }
- else if (command is RenameRequest)
- {
- RenameRequest request = (RenameRequest)command;
- return FileStoreResponseHelper.GetRenameResponse(header, request, share, state);
- }
- else if (command is QueryInformationRequest)
- {
- QueryInformationRequest request = (QueryInformationRequest)command;
- return FileStoreResponseHelper.GetQueryInformationResponse(header, request, share, state);
- }
- else if (command is SetInformationRequest)
- {
- SetInformationRequest request = (SetInformationRequest)command;
- return FileStoreResponseHelper.GetSetInformationResponse(header, request, share, state);
- }
- else if (command is ReadRequest)
- {
- ReadRequest request = (ReadRequest)command;
- return ReadWriteResponseHelper.GetReadResponse(header, request, share, state);
- }
- else if (command is WriteRequest)
- {
- WriteRequest request = (WriteRequest)command;
- return ReadWriteResponseHelper.GetWriteResponse(header, request, share, state);
- }
- else if (command is CheckDirectoryRequest)
- {
- CheckDirectoryRequest request = (CheckDirectoryRequest)command;
- return FileStoreResponseHelper.GetCheckDirectoryResponse(header, request, share, state);
- }
- else if (command is WriteRawRequest)
- {
- // [MS-CIFS] 3.3.5.26 - Receiving an SMB_COM_WRITE_RAW Request:
- // the server MUST verify that the Server.Capabilities include CAP_RAW_MODE,
- // If an error is detected [..] the Write Raw operation MUST fail and
- // the server MUST return a Final Server Response [..] with the Count field set to zero.
- return new WriteRawFinalResponse();
- }
- else if (command is SetInformation2Request)
- {
- SetInformation2Request request = (SetInformation2Request)command;
- return FileStoreResponseHelper.GetSetInformation2Response(header, request, share, state);
- }
- else if (command is LockingAndXRequest)
- {
- header.Status = NTStatus.STATUS_ACCESS_DENIED;
- return new ErrorResponse(command.CommandName);
- }
- else if (command is OpenAndXRequest)
- {
- OpenAndXRequest request = (OpenAndXRequest)command;
- return OpenAndXHelper.GetOpenAndXResponse(header, request, share, state);
- }
- else if (command is ReadAndXRequest)
- {
- ReadAndXRequest request = (ReadAndXRequest)command;
- return ReadWriteResponseHelper.GetReadResponse(header, request, share, state);
- }
- else if (command is WriteAndXRequest)
- {
- WriteAndXRequest request = (WriteAndXRequest)command;
- return ReadWriteResponseHelper.GetWriteResponse(header, request, share, state);
- }
- else if (command is FindClose2Request)
- {
- return ServerResponseHelper.GetFindClose2Request(header, (FindClose2Request)command, state);
- }
- else if (command is TreeDisconnectRequest)
- {
- TreeDisconnectRequest request = (TreeDisconnectRequest)command;
- return TreeConnectHelper.GetTreeDisconnectResponse(header, request, state);
- }
- else if (command is TransactionRequest) // Both TransactionRequest and Transaction2Request
- {
- TransactionRequest request = (TransactionRequest)command;
- try
- {
- return TransactionHelper.GetTransactionResponse(header, request, share, state, sendQueue);
- }
- catch (UnsupportedInformationLevelException)
- {
- header.Status = NTStatus.STATUS_INVALID_PARAMETER;
- return new ErrorResponse(command.CommandName);
- }
- }
- else if (command is TransactionSecondaryRequest) // Both TransactionSecondaryRequest and Transaction2SecondaryRequest
- {
- TransactionSecondaryRequest request = (TransactionSecondaryRequest)command;
- try
- {
- return TransactionHelper.GetTransactionResponse(header, request, share, state, sendQueue);
- }
- catch (UnsupportedInformationLevelException)
- {
- header.Status = NTStatus.STATUS_INVALID_PARAMETER;
- return new ErrorResponse(command.CommandName);
- }
- }
- else if (command is NTTransactRequest)
- {
- NTTransactRequest request = (NTTransactRequest)command;
- return NTTransactHelper.GetNTTransactResponse(header, request, share, state, sendQueue);
- }
- else if (command is NTTransactSecondaryRequest)
- {
- NTTransactSecondaryRequest request = (NTTransactSecondaryRequest)command;
- return NTTransactHelper.GetNTTransactResponse(header, request, share, state, sendQueue);
- }
- else if (command is NTCreateAndXRequest)
- {
- NTCreateAndXRequest request = (NTCreateAndXRequest)command;
- return NTCreateHelper.GetNTCreateResponse(header, request, share, state);
- }
- }
- }
- header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
- return new ErrorResponse(command.CommandName);
- }
- public static void TrySendMessage(ConnectionState state, SMB1Message response)
- {
- SessionMessagePacket packet = new SessionMessagePacket();
- packet.Trailer = response.GetBytes();
- TrySendPacket(state, packet);
- state.LogToServer(Severity.Verbose, "SMB1 message sent: {0} responses, First response: {1}, Packet length: {2}", response.Commands.Count, response.Commands[0].CommandName.ToString(), packet.Length);
- }
- private static void PrepareResponseHeader(SMB1Message response, SMB1Message request)
- {
- response.Header.Status = NTStatus.STATUS_SUCCESS;
- response.Header.Flags = HeaderFlags.CaseInsensitive | HeaderFlags.CanonicalizedPaths | HeaderFlags.Reply;
- response.Header.Flags2 = HeaderFlags2.NTStatusCode;
- if ((request.Header.Flags2 & HeaderFlags2.LongNamesAllowed) > 0)
- {
- response.Header.Flags2 |= HeaderFlags2.LongNamesAllowed | HeaderFlags2.LongNameUsed;
- }
- if ((request.Header.Flags2 & HeaderFlags2.ExtendedAttributes) > 0)
- {
- response.Header.Flags2 |= HeaderFlags2.ExtendedAttributes;
- }
- if ((request.Header.Flags2 & HeaderFlags2.ExtendedSecurity) > 0)
- {
- response.Header.Flags2 |= HeaderFlags2.ExtendedSecurity;
- }
- if ((request.Header.Flags2 & HeaderFlags2.Unicode) > 0)
- {
- response.Header.Flags2 |= HeaderFlags2.Unicode;
- }
- response.Header.MID = request.Header.MID;
- response.Header.PID = request.Header.PID;
- response.Header.UID = request.Header.UID;
- response.Header.TID = request.Header.TID;
- }
- }
- }
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