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## net.sourceforge.jtds.util
Class SSPIJNIClient

    java.lang.Object
      |
      +--net.sourceforge.jtds.util.SSPIJNIClient

public class SSPIJNIClient
extends java.lang.Object

A JNI client to SSPI based CPP program (DLL) that returns the user credentials for NTLM authentication.

The DLL name is ntlmauth.dll.

Author:
  Magendran Sathaiah (mahi@aztec.soft.net)

Field Summary
`private boolean` | `initialized` SSPI client initialized flag.
`private static boolean` | `libraryLoaded` SSPI native library loaded flag.
`private static SSPIJNIClient` | `thisInstance` Singleton instance.

Constructor Summary
`private` | `SSPIJNIClient()` Private constructor for singleton.

Method Summary
`(package private) static void` | `()`
`static SSPIJNIClient` | `getInstance()` Returns the singleton `SSPIJNIClient` instance.
`private void` | `initialize()` Initializes the SSPI client.
`void` | `invokeInitialize()` Calls `initialize()` if the SSPI client is not already inited.
`byte[]` | `invokePrepareSSORequest()` Calls `prepareSSORequest()` to prepare the NTLM TYPE-1 message.
`byte[]` | `invokePrepareSSOSubmit(byte[] buf)` Calls `prepareSSOSubmit(byte[], long)` to prepare the NTLM TYPE-3 message.
`void` | `invokeUnInitialize()` Calls `unInitialize()` if the SSPI client is inited.
`private byte[]` | `prepareSSORequest()` Prepares the NTLM TYPE-1 message and returns it as a `byte[]`.
`private byte[]` | `prepareSSOSubmit(byte[] buf, long size)` Prepares the NTLM TYPE-3 message using the current user's credentials.
`private void` | `unInitialize()` Uninitializes the SSPI client.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait`

Field Detail

### thisInstance

    private static SSPIJNIClient thisInstance

  Singleton instance.

### libraryLoaded

    private static boolean libraryLoaded

  SSPI native library loaded flag.

### initialized

    private boolean initialized

  SSPI client initialized flag.

Constructor Detail

### SSPIJNIClient

    private SSPIJNIClient()

  Private constructor for singleton.

Method Detail

### initialize

    private void initialize()

  Initializes the SSPI client.

### unInitialize

    private void unInitialize()

  Uninitializes the SSPI client.

### prepareSSORequest

    private byte[] prepareSSORequest()

  Prepares the NTLM TYPE-1 message and returns it as a `byte[]`.

### prepareSSOSubmit

    private byte[] prepareSSOSubmit(byte[] buf,
                                    long size)

  Prepares the NTLM TYPE-3 message using the current user's credentials.

  It needs the challenge BLOB and it's size as input. The challenge BLOB is nothig but the TYPE-2 message that is received from the SQL Server.

  Parameters:
    `buf` - challenge BLOB
    `size` - challenge BLOB size
  Returns:
    NTLM TYPE-3 message

###

    static void ()

### getInstance

    public static SSPIJNIClient getInstance()
                                     throws java.lang.Exception

  Returns the singleton `SSPIJNIClient` instance.
  Throws:
    `java.sql.SQLException` - if an error occurs during initialization

### invokeInitialize

    public void invokeInitialize()

  Calls `initialize()` if the SSPI client is not already inited.

### invokeUnInitialize

    public void invokeUnInitialize()

  Calls `unInitialize()` if the SSPI client is inited.

### invokePrepareSSORequest

    public byte[] invokePrepareSSORequest()
                                   throws java.lang.Exception

  Calls `prepareSSORequest()` to prepare the NTLM TYPE-1 message.
  Throws:
    `java.lang.Exception` - if an error occurs during the call or the SSPI client is uninitialized

### invokePrepareSSOSubmit

    public byte[] invokePrepareSSOSubmit(byte[] buf)
                                  throws java.lang.Exception

  Calls `prepareSSOSubmit(byte[], long)` to prepare the NTLM TYPE-3 message.
  Throws:
    `java.lang.Exception` - if an error occurs during the call or the SSPI client is uninitialized

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Generated on November 8 2005