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//
// Mono.Data.Tds.Protocol.Tds70.cs
//
// Author:
// Tim Coleman (tim@timcoleman.com)
// Diego Caravana (diego@toth.it)
// Sebastien Pouliot (sebastien@ximian.com)
// Daniel Morgan (danielmorgan@verizon.net)
//
// Copyright (C) 2002 Tim Coleman
// Portions (C) 2003 Motus Technologies Inc. (http://www.motus.com)
// Portions (C) 2003 Daniel Morgan
//
using Mono.Security.Protocol.Ntlm;
using System;
using System.Text;
namespace Mono.Data.Tds.Protocol {
public class Tds70 : Tds
{
#region Fields
public readonly static TdsVersion Version = TdsVersion.tds70;
#endregion // Fields
#region Constructors
public Tds70 (string server, int port)
: this (server, port, 512, 15)
{
}
public Tds70 (string server, int port, int packetSize, int timeout)
: base (server, port, packetSize, timeout, Version)
{
}
#endregion // Constructors
#region Methods
private string BuildExec (string sql)
{
string esql = sql.Replace ("'", "''"); // escape single quote
if (Parameters != null && Parameters.Count > 0)
return BuildProcedureCall (String.Format ("sp_executesql N'{0}', N'{1}', ", esql, BuildPreparedParameters ()));
else
return BuildProcedureCall (String.Format ("sp_executesql N'{0}'", esql));
}
private string BuildParameters ()
{
if (Parameters == null || Parameters.Count == 0)
return String.Empty;
StringBuilder result = new StringBuilder ();
foreach (TdsMetaParameter p in Parameters) {
if (p.Direction != TdsParameterDirection.ReturnValue) {
if (result.Length > 0)
result.Append (", ");
if (p.Direction == TdsParameterDirection.InputOutput)
result.Append (String.Format("{0}={0} output", p.ParameterName));
else
result.Append (FormatParameter (p));
}
}
return result.ToString ();
}
private string BuildPreparedParameters ()
{
StringBuilder parms = new StringBuilder ();
foreach (TdsMetaParameter p in Parameters) {
if (parms.Length > 0)
parms.Append (", ");
parms.Append (p.Prepare ());
if (p.Direction == TdsParameterDirection.Output)
parms.Append (" output");
}
return parms.ToString ();
}
private string BuildPreparedQuery (string id)
{
return BuildProcedureCall (String.Format ("sp_execute {0},", id));
}
private string BuildProcedureCall (string procedure)
{
string exec = String.Empty;
StringBuilder declare = new StringBuilder ();
StringBuilder select = new StringBuilder ();
StringBuilder set = new StringBuilder ();
int count = 0;
if (Parameters != null) {
foreach (TdsMetaParameter p in Parameters) {
if (p.Direction != TdsParameterDirection.Input) {
if (count == 0)
select.Append ("select ");
else
select.Append (", ");
select.Append (p.ParameterName);
declare.Append (String.Format ("declare {0}\n", p.Prepare ()));
if (p.Direction != TdsParameterDirection.ReturnValue) {
if( p.Direction == TdsParameterDirection.InputOutput )
set.Append (String.Format ("set {0}\n", FormatParameter(p)));
else
set.Append (String.Format ("set {0}=NULL\n", p.ParameterName));
}
count += 1;
}
if (p.Direction == TdsParameterDirection.ReturnValue) {
exec = p.ParameterName + "=";
}
}
}
if (count > 0 || exec.Length > 0)
exec = "exec " + exec;
return String.Format ("{0}{1}{2}{3} {4}\n{5}", declare.ToString (), set.ToString (), exec, procedure, BuildParameters (), select.ToString ());
}
public override bool Connect (TdsConnectionParameters connectionParameters)
{
if (IsConnected)
throw new InvalidOperationException ("The connection is already open.");
connectionParms = connectionParameters;
SetLanguage (connectionParameters.Language);
SetCharset ("utf-8");
byte[] empty = new byte[0];
short authLen = 0;
byte pad = (byte) 0;
byte[] domainMagic = { 6, 0x7d, 0x0f, 0xfd, 0xff, 0x0, 0x0, 0x0,
0x0, 0xe0, 0x83, 0x0, 0x0,
0x68, 0x01, 0x00, 0x00, 0x09, 0x04, 0x00, 0x00 };
byte[] sqlserverMagic = { 6, 0x83, 0xf2, 0xf8,
0xff, 0x0, 0x0, 0x0,
0x0, 0xe0, 0x03, 0x0,
0x0, 0x88, 0xff, 0xff, 0xff, 0x36,
0x04, 0x00, 0x00 };
byte[] magic = null;
if (connectionParameters.DomainLogin == true)
magic = domainMagic;
else
magic = sqlserverMagic;
string username = connectionParameters.User;
string domain = Environment.UserDomainName;
domain = connectionParameters.DefaultDomain = Environment.UserDomainName;
int idx = 0;
if ((idx = username.IndexOf (@"\")) > -1) {
domain = username.Substring (0, idx);
username = username.Substring (idx + 1);
connectionParameters.DefaultDomain = domain;
connectionParameters.User = username;
}
short partialPacketSize = (short) (86 + (
connectionParameters.Hostname.Length +
connectionParameters.ApplicationName.Length +
DataSource.Length +
connectionParameters.LibraryName.Length +
Language.Length +
connectionParameters.Database.Length) * 2);
if(connectionParameters.DomainLogin == true) {
authLen = ((short) (32 + (connectionParameters.Hostname.Length +
domain.Length)));
partialPacketSize += authLen;
}
else
partialPacketSize += ((short) ((username.Length + connectionParameters.Password.Length) * 2));
short totalPacketSize = (short) partialPacketSize;
Comm.StartPacket (TdsPacketType.Logon70);
Comm.Append (totalPacketSize);
Comm.Append (empty, 5, pad);
Comm.Append ((byte) 0x70); // TDS Version 7
Comm.Append (empty, 3, pad);
Comm.Append (empty, 4, pad);
Comm.Append (magic);
short curPos = 86;
// Hostname
Comm.Append (curPos);
Comm.Append ((short) connectionParameters.Hostname.Length);
curPos += (short) (connectionParameters.Hostname.Length * 2);
if(connectionParameters.DomainLogin.Equals(true))
{
Comm.Append((short)0);
Comm.Append((short)0);
Comm.Append((short)0);
Comm.Append((short)0);
}
else
{
// Username
Comm.Append (curPos);
Comm.Append ((short) username.Length);
curPos += ((short) (username.Length * 2));
// Password
Comm.Append (curPos);
Comm.Append ((short) connectionParameters.Password.Length);
curPos += (short) (connectionParameters.Password.Length * 2);
}
// AppName
Comm.Append (curPos);
Comm.Append ((short) connectionParameters.ApplicationName.Length);
curPos += (short) (connectionParameters.ApplicationName.Length * 2);
// Server Name
Comm.Append (curPos);
Comm.Append ((short) DataSource.Length);
curPos += (short) (DataSource.Length * 2);
// Unknown
Comm.Append ((short) 0);
Comm.Append ((short) 0);
// Library Name
Comm.Append (curPos);
Comm.Append ((short) connectionParameters.LibraryName.Length);
curPos += (short) (connectionParameters.LibraryName.Length * 2);
// Language
Comm.Append (curPos);
Comm.Append ((short) Language.Length);
curPos += (short) (Language.Length * 2);
// Database
Comm.Append (curPos);
Comm.Append ((short) connectionParameters.Database.Length);
curPos += (short) (connectionParameters.Database.Length * 2);
// MAC Address
Comm.Append((byte) 0);
Comm.Append((byte) 0);
Comm.Append((byte) 0);
Comm.Append((byte) 0);
Comm.Append((byte) 0);
Comm.Append((byte) 0);
// Authentication Stuff
Comm.Append ((short) curPos);
if (connectionParameters.DomainLogin == true)
{
Comm.Append ((short) authLen);
curPos += (short) authLen;
}
else
Comm.Append ((short) 0);
// Unknown
Comm.Append (curPos);
Comm.Append ((short) 0);
// Connection Parameters
Comm.Append (connectionParameters.Hostname);
if (connectionParameters.DomainLogin == false)
{
// SQL Server Authentication
Comm.Append (connectionParameters.User);
string scrambledPwd = EncryptPassword (connectionParameters.Password);
Comm.Append (scrambledPwd);
}
Comm.Append (connectionParameters.ApplicationName);
Comm.Append (DataSource);
Comm.Append (connectionParameters.LibraryName);
Comm.Append (Language);
Comm.Append (connectionParameters.Database);
if (connectionParameters.DomainLogin)
{
// the rest of the packet is NTLMSSP authentication
Type1Message msg = new Type1Message ();
msg.Domain = domain;
msg.Host = connectionParameters.Hostname;
msg.Flags = NtlmFlags.NegotiateUnicode |
NtlmFlags.NegotiateNtlm |
NtlmFlags.NegotiateDomainSupplied |
NtlmFlags.NegotiateWorkstationSupplied |
NtlmFlags.NegotiateAlwaysSign; // 0xb201
Comm.Append (msg.GetBytes ());
}
Comm.SendPacket ();
MoreResults = true;
SkipToEnd ();
return IsConnected;
}
private static string EncryptPassword (string pass)
{
int xormask = 0x5a5a;
int len = pass.Length;
char[] chars = new char[len];
for (int i = 0; i < len; ++i) {
int c = ((int) (pass[i])) ^ xormask;
int m1 = (c >> 4) & 0x0f0f;
int m2 = (c << 4) & 0xf0f0;
chars[i] = (char) (m1 | m2);
}
return new String (chars);
}
public override bool Reset ()
{
try
{
ExecProc ("exec sp_reset_connection");
return true;
}
catch
{
Console.WriteLine ("Error reseting");
return false;
}
}
public override void ExecPrepared (string commandText, TdsMetaParameterCollection parameters, int timeout, bool wantResults)
{
Parameters = parameters;
ExecuteQuery (BuildPreparedQuery (commandText), timeout, wantResults);
}
public override void ExecProc (string commandText, TdsMetaParameterCollection parameters, int timeout, bool wantResults)
{
Parameters = parameters;
ExecuteQuery (BuildProcedureCall (commandText), timeout, wantResults);
}
public override void Execute (string commandText, TdsMetaParameterCollection parameters, int timeout, bool wantResults)
{
Parameters = parameters;
string sql = commandText;
if (wantResults || (Parameters != null && Parameters.Count > 0))
sql = BuildExec (commandText);
ExecuteQuery (sql, timeout, wantResults);
}
private bool IsBlobType (TdsColumnType columnType)
{
return (columnType == TdsColumnType.Text || columnType == TdsColumnType.Image || columnType == TdsColumnType.NText);
}
private bool IsLargeType (TdsColumnType columnType)
{
return (columnType == TdsColumnType.NChar || (byte) columnType > 128);
}
private string FormatParameter (TdsMetaParameter parameter)
{
if (parameter.Direction == TdsParameterDirection.Output)
return String.Format ("{0}={0} output", parameter.ParameterName);
if (parameter.Value == null || parameter.Value == DBNull.Value)
return parameter.ParameterName + "=NULL";
string value = null;
switch (parameter.TypeName) {
case "bigint":
case "decimal":
case "float":
case "int":
case "money":
case "real":
case "smallint":
case "smallmoney":
case "tinyint":
value = parameter.Value.ToString ();
break;
case "nvarchar":
case "nchar":
value = String.Format ("N'{0}'", parameter.Value.ToString ().Replace ("'", "''"));
break;
case "uniqueidentifier":
value = String.Format ("0x{0}", ((Guid) parameter.Value).ToString ("N"));
break;
case "bit":
if (parameter.Value.GetType () == typeof (bool))
value = (((bool) parameter.Value) ? "0x1" : "0x0");
else
value = parameter.Value.ToString ();
break;
case "image":
case "binary":
case "varbinary":
value = String.Format ("0x{0}", BitConverter.ToString ((byte[]) parameter.Value).Replace ("-", "").ToLower ());
break;
default:
value = String.Format ("'{0}'", parameter.Value.ToString ().Replace ("'", "''"));
break;
}
return parameter.ParameterName + "=" + value;
}
public override string Prepare (string commandText, TdsMetaParameterCollection parameters)
{
Parameters = parameters;
TdsMetaParameterCollection parms = new TdsMetaParameterCollection ();
TdsMetaParameter parm = new TdsMetaParameter ("@P1", "int", null);
parm.Direction = TdsParameterDirection.Output;
parms.Add (parm);
parms.Add (new TdsMetaParameter ("@P2", "nvarchar", BuildPreparedParameters ()));
parms.Add (new TdsMetaParameter ("@P3", "nvarchar", commandText));
ExecProc ("sp_prepare", parms, 0, true);
if (!NextResult () || !NextRow () || ColumnValues [0] == null || ColumnValues [0] == DBNull.Value)
throw new TdsInternalException ();
SkipToEnd ();
return ColumnValues [0].ToString ();
}
protected override TdsDataColumnCollection ProcessColumnInfo ()
{
TdsDataColumnCollection result = new TdsDataColumnCollection ();
int numColumns = Comm.GetTdsShort ();
for (int i = 0; i < numColumns; i += 1) {
byte[] flagData = new byte[4];
for (int j = 0; j < 4; j += 1)
flagData[j] = Comm.GetByte ();
bool nullable = (flagData[2] & 0x01) > 0;
bool caseSensitive = (flagData[2] & 0x02) > 0;
bool writable = (flagData[2] & 0x0c) > 0;
bool autoIncrement = (flagData[2] & 0x10) > 0;
bool isIdentity = (flagData[2] & 0x10) > 0;
TdsColumnType columnType = (TdsColumnType) (Comm.GetByte () & 0xff);
if ((byte) columnType == 0xef)
columnType = TdsColumnType.NChar;
byte xColumnType = 0;
if (IsLargeType (columnType)) {
xColumnType = (byte) columnType;
if (columnType != TdsColumnType.NChar)
columnType -= 128;
}
int columnSize;
string tableName = null;
if (IsBlobType (columnType)) {
columnSize = Comm.GetTdsInt ();
tableName = Comm.GetString (Comm.GetTdsShort ());
}
else if (IsFixedSizeColumn (columnType))
columnSize = LookupBufferSize (columnType);
else if (IsLargeType ((TdsColumnType) xColumnType))
columnSize = Comm.GetTdsShort ();
else
columnSize = Comm.GetByte () & 0xff;
byte precision = 0;
byte scale = 0;
switch (columnType) {
case TdsColumnType.NText:
case TdsColumnType.NChar:
case TdsColumnType.NVarChar:
columnSize /= 2;
break;
case TdsColumnType.Decimal:
case TdsColumnType.Numeric:
precision = Comm.GetByte ();
scale = Comm.GetByte ();
break;
}
string columnName = Comm.GetString (Comm.GetByte ());
int index = result.Add (new TdsDataColumn ());
result[index]["AllowDBNull"] = nullable;
result[index]["ColumnName"] = columnName;
result[index]["ColumnSize"] = columnSize;
result[index]["ColumnType"] = columnType;
result[index]["IsIdentity"] = isIdentity;
result[index]["IsReadOnly"] = !writable;
result[index]["NumericPrecision"] = precision;
result[index]["NumericScale"] = scale;
result[index]["BaseTableName"] = tableName;
}
return result;
}
public override void Unprepare (string statementId)
{
TdsMetaParameterCollection parms = new TdsMetaParameterCollection ();
parms.Add (new TdsMetaParameter ("@P1", "int", Int32.Parse (statementId)));
ExecProc ("sp_unprepare", parms, 0, false);
}
#endregion // Methods
}
}
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