Module jdk.security.jgss
Package com.sun.security.jgss

# Interface ExtendedGSSContext

All Superinterfaces:
  `GSSContext`

    public interface ExtendedGSSContext
    extends GSSContext

The extended GSSContext interface for supporting additional functionalities not defined by `org.ietf.jgss.GSSContext`, such as querying context-specific attributes.

## Field Summary

### Fields declared in interface org.ietf.jgss.GSSContext

`DEFAULT_LIFETIME, INDEFINITE_LIFETIME`

## Method Summary

Modifier and Type | Method | Description
--- | --- | ---
`boolean` | `getDelegPolicyState()` | Returns the delegation policy response.
`Object` | `inquireSecContext​(InquireType type)` | Return the mechanism-specific attribute associated with `type`.
`void` | `requestDelegPolicy​(boolean state)` | Requests that the delegation policy be respected.

### Methods declared in interface org.ietf.jgss.GSSContext

`acceptSecContext, acceptSecContext, dispose, export, getAnonymityState, getConfState, getCredDelegState, getDelegCred, getIntegState, getLifetime, getMech, getMIC, getMIC, getMutualAuthState, getReplayDetState, getSequenceDetState, getSrcName, getTargName, getWrapSizeLimit, initSecContext, initSecContext, isEstablished, isInitiator, isProtReady, isTransferable, requestAnonymity, requestConf, requestCredDeleg, requestInteg, requestLifetime, requestMutualAuth, requestReplayDet, requestSequenceDet, setChannelBinding, unwrap, unwrap, verifyMIC, verifyMIC, wrap, wrap`

## Method Details

### inquireSecContext

Object inquireSecContext​(InquireType type) throws GSSException
Return the mechanism-specific attribute associated with `type`.

If there is a security manager, an `InquireSecContextPermission` with the name `type.mech` must be granted. Otherwise, this could result in a `SecurityException`.

Example:

          GSSContext ctxt = m.createContext(...)
          // Establishing the context
          if (ctxt instanceof ExtendedGSSContext) {
              ExtendedGSSContext ex = (ExtendedGSSContext)ctxt;
              try {
                  Key key = (key)ex.inquireSecContext(
                          InquireType.KRB5_GET_SESSION_KEY);
                  // read key info
              } catch (GSSException gsse) {
                  // deal with exception
              }
          }

Parameters:
  `type` - the type of the attribute requested
Returns:
  the attribute, see the method documentation for details.
Throws:
  `GSSException` - containing the following major error codes: `GSSException.BAD_MECH` if the mechanism does not support this method, `GSSException.UNAVAILABLE` if the type specified is not supported, `GSSException.NO_CONTEXT` if the security context is invalid, `GSSException.FAILURE` for other unspecified failures.
  `SecurityException` - if a security manager exists and a proper `InquireSecContextPermission` is not granted.
See Also:
  `InquireSecContextPermission`, `InquireType`

### requestDelegPolicy

void requestDelegPolicy​(boolean state) throws GSSException
Requests that the delegation policy be respected. When a true value is requested, the underlying context would use the delegation policy defined by the environment as a hint to determine whether credentials delegation should be performed. This request can only be made on the context initiator's side and it has to be done prior to the first call to `initSecContext`.

When this flag is false, delegation will only be tried when the `credentials delegation flag` is true.

When this flag is true but the `credentials delegation flag` is false, delegation will be only tried if the delegation policy permits delegation.

When both this flag and the `credentials delegation flag` are true, delegation will be always tried. However, if the delegation policy does not permit delegation, the value of `getDelegPolicyState()` will be false, even if delegation is performed successfully.

In any case, if the delegation is not successful, the value returned by `GSSContext.getCredDelegState()` is false, and the value returned by `getDelegPolicyState()` is also false.

Not all mechanisms support delegation policy. Therefore, the application should check to see if the request was honored with the `getDelegPolicyState` method. When delegation policy is not supported, `requestDelegPolicy` should return silently without throwing an exception.

Note: for the Kerberos 5 mechanism, the delegation policy is expressed through the OK-AS-DELEGATE flag in the service ticket. When it's true, the KDC permits delegation to the target server. In a cross-realm environment, in order for delegation be permitted, all cross-realm TGTs on the authentication path must also have the OK-AS-DELAGATE flags set.

Parameters:
  `state` - true if the policy should be respected
Throws:
  `GSSException` - containing the following major error codes: `GSSException.FAILURE`

### getDelegPolicyState

boolean getDelegPolicyState()
Returns the delegation policy response. Called after a security context is established. This method can be only called on the initiator's side. See `requestDelegPolicy(boolean)`.

Returns:
  the delegation policy response