JavaTM 2 Platform Std. Ed. v1.6.0
org.ietf.jgss
Class ChannelBinding
java.lang.Object
org.ietf.jgss.ChannelBinding
public class ChannelBinding - extends Object
This class encapsulates the concept of caller-provided channel
binding information. Channel bindings are used to strengthen the
quality with which peer entity authentication is provided during
context establishment. They enable the GSS-API callers to bind the
establishment of the security context to relevant characteristics
like addresses or to application specific data.
The caller initiating the security context must determine the
appropriate channel binding values to set in the GSSContext object.
The acceptor must provide an identical binding in order to validate
that received tokens possess correct channel-related characteristics.
Use of channel bindings is optional in GSS-API. ChannelBinding can be
set for the GSSContext using the setChannelBinding method
before the first call to initSecContext or acceptSecContext has been performed. Unless the setChannelBinding
method has been used to set the ChannelBinding for a GSSContext object,
null ChannelBinding will be assumed.
Conceptually, the GSS-API concatenates the initiator and acceptor
address information, and the application supplied byte array to form an
octet string. The mechanism calculates a MIC over this octet string and
binds the MIC to the context establishment token emitted by
initSecContext method of the GSSContext
interface. The same bindings are set by the context acceptor for its
GSSContext object and during processing of the
acceptSecContext method a MIC is calculated in the same
way. The calculated MIC is compared with that found in the token, and if
the MICs differ, accept will throw a GSSException with the
major code set to BAD_BINDINGS , and
the context will not be established. Some mechanisms may include the
actual channel binding data in the token (rather than just a MIC);
applications should therefore not use confidential data as
channel-binding components.
Individual mechanisms may impose additional constraints on addresses
that may appear in channel bindings. For example, a mechanism may
verify that the initiator address field of the channel binding
contains the correct network address of the host system. Portable
applications should therefore ensure that they either provide correct
information for the address fields, or omit setting of the addressing
information.
- Since:
- 1.4
Constructor Summary |
ChannelBinding(byte[] appData)
Creates a ChannelBinding object without any addressing information. |
ChannelBinding(InetAddress initAddr,
InetAddress acceptAddr,
byte[] appData)
Create a ChannelBinding object with user supplied address information
and data. |
ChannelBinding
public ChannelBinding(InetAddress initAddr,
InetAddress acceptAddr,
byte[] appData)
- Create a ChannelBinding object with user supplied address information
and data.
null values can be used for any fields which the
application does not want to specify.
- Parameters:
initAddr - the address of the context initiator.
null value can be supplied to indicate that the
application does not want to set this value.acceptAddr - the address of the context
acceptor. null value can be supplied to indicate that
the application does not want to set this value.appData - application supplied data to be used as part of the
channel bindings. null value can be supplied to
indicate that the application does not want to set this value.
ChannelBinding
public ChannelBinding(byte[] appData)
- Creates a ChannelBinding object without any addressing information.
- Parameters:
appData - application supplied data to be used as part of the
channel bindings.
getInitiatorAddress
public InetAddress getInitiatorAddress()
- Get the initiator's address for this channel binding.
- Returns:
- the initiator's address.
null is returned if
the address has not been set.
getAcceptorAddress
public InetAddress getAcceptorAddress()
- Get the acceptor's address for this channel binding.
- Returns:
- the acceptor's address. null is returned if the address has
not been set.
getApplicationData
public byte[] getApplicationData()
- Get the application specified data for this channel binding.
- Returns:
- the application data being used as part of the
ChannelBinding.
null is returned if no application data
has been specified for the channel binding.
equals
public boolean equals(Object obj)
- Compares two instances of ChannelBinding.
- Overrides:
equals in class Object
- Parameters:
obj - another ChannelBinding to compare this one with
- Returns:
- true if the two ChannelBinding's contain
the same values for the initiator and acceptor addresses and the
application data.
- See Also:
Object.hashCode() ,
Hashtable
hashCode
public int hashCode()
- Returns a hashcode value for this ChannelBinding object.
- Overrides:
hashCode in class Object
- Returns:
- a hashCode value
- See Also:
Object.equals(java.lang.Object) ,
Hashtable
Copyright 2003 Sun Microsystems, Inc. All rights reserved
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