## org.apache.http.impl.auth
Class NegotiateScheme

    java.lang.Object
      org.apache.http.impl.auth.AuthSchemeBase
          org.apache.http.impl.auth.NegotiateScheme

All Implemented Interfaces:
  AuthScheme, ContextAwareAuthScheme

    public class NegotiateScheme

extends AuthSchemeBase

SPNEGO (Simple and Protected GSSAPI Negotiation Mechanism) authentication scheme.

Since:
  4.1

Constructor Summary
`NegotiateScheme()`
`NegotiateScheme(SpnegoTokenGenerator spengoGenerator)`
`NegotiateScheme(SpnegoTokenGenerator spengoGenerator, boolean stripPort)` Default constructor for the Negotiate authentication scheme.

Method Summary
`Header` `authenticate(Credentials credentials, HttpRequest request)` Deprecated.
`Header` `authenticate(Credentials credentials, HttpRequest request, HttpContext context)` Produces Negotiate authorization Header based on token created by processChallenge.
`protected GSSManager` `getManager()`
`String` `getParameter(String name)` Returns the authentication parameter with the given name, if available.
`String` `getRealm()` The concept of an authentication realm is not supported by the Negotiate authentication scheme.
`String` `getSchemeName()` Returns textual designation of the Negotiate authentication scheme.
`boolean` `isComplete()` Tests if the Negotiate authentication process has been completed.
`boolean` `isConnectionBased()` Returns `true`.
`protected void` `parseChallenge(CharArrayBuffer buffer, int beginIndex, int endIndex)`

Methods inherited from class org.apache.http.impl.auth.AuthSchemeBase
`isProxy, processChallenge, toString`

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

Constructor Detail

### NegotiateScheme

    public NegotiateScheme(SpnegoTokenGenerator spengoGenerator,
                           boolean stripPort)

  Default constructor for the Negotiate authentication scheme.

### NegotiateScheme

    public NegotiateScheme(SpnegoTokenGenerator spengoGenerator)

### NegotiateScheme

    public NegotiateScheme()

Method Detail

### isComplete

    public boolean isComplete()

  Tests if the Negotiate authentication process has been completed.

  Returns:
    `true` if authorization has been processed, `false` otherwise.

### getSchemeName

    public String getSchemeName()

  Returns textual designation of the Negotiate authentication scheme.

  Returns:
    `Negotiate`

### authenticate

    @Deprecated
    public Header authenticate(Credentials credentials,
                                          HttpRequest request)
                        throws AuthenticationException

  Deprecated.

  Description copied from interface: `AuthScheme`
  Produces an authorization string for the given set of `Credentials`.

  Parameters:
    `credentials` - The set of credentials to be used for athentication
    `request` - The request being authenticated
  Returns:
    the authorization string
  Throws:
    `AuthenticationException` - if authorization string cannot be generated due to an authentication failure

### getManager

    protected GSSManager getManager()

### authenticate

    public Header authenticate(Credentials credentials,
                               HttpRequest request,
                               HttpContext context)
                        throws AuthenticationException

  Produces Negotiate authorization Header based on token created by processChallenge.

  Specified by:
    `authenticate` in interface `ContextAwareAuthScheme`
  Overrides:
    `authenticate` in class `AuthSchemeBase`
  Parameters:
    `credentials` - Never used be the Negotiate scheme but must be provided to satisfy common-httpclient API. Credentials from JAAS will be used instead.
    `request` - The request being authenticated
    `context` - HTTP context
  Returns:
    an Negotiate authorisation Header
  Throws:
    `AuthenticationException` - if authorisation string cannot be generated due to an authentication failure

### getParameter

    public String getParameter(String name)

  Returns the authentication parameter with the given name, if available.

  There are no valid parameters for Negotiate authentication so this method always returns `null`.

  Parameters:
    `name` - The name of the parameter to be returned
  Returns:
    the parameter with the given name

### getRealm

    public String getRealm()

  The concept of an authentication realm is not supported by the Negotiate authentication scheme. Always returns `null`.

  Returns:
    `null`

### isConnectionBased

    public boolean isConnectionBased()

  Returns `true`. Negotiate authentication scheme is connection based.

  Returns:
    `true`.

### parseChallenge

    protected void parseChallenge(CharArrayBuffer buffer,
                                  int beginIndex,
                                  int endIndex)
                           throws MalformedChallengeException

  Specified by:
    `parseChallenge` in class `AuthSchemeBase`
  Throws:
    `MalformedChallengeException`

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