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
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Constructor Summary
ConstructorDescriptionChannelBinding
(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. -
Method Summary
Modifier and TypeMethodDescriptionboolean
Compares two instances of ChannelBinding.Get the acceptor's address for this channel binding.byte[]
Get the application specified data for this channel binding.Get the initiator's address for this channel binding.int
hashCode()
Returns a hashcode value for this ChannelBinding object.
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Constructor Details
-
ChannelBinding
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.
-
-
Method Details
-
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
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
Compares two instances of ChannelBinding. -
hashCode
public int hashCode()Returns a hashcode value for this ChannelBinding object.
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