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RFC 2853

Generic Security Service API Version 2 : Java Bindings

Pages: 96
Obsoleted by:  5653
Part 3 of 4 – Pages 51 to 73
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ToP   noToC   RFC2853 - Page 51   prevText

6.4. public interface GSSContext

This interface encapsulates the GSS-API security context and provides the security services (wrap, unwrap, getMIC, verifyMIC) that are available over the context. Security contexts are established between peers using locally acquired credentials. Multiple contexts may exist simultaneously between a pair of peers, using the same or different set of credentials. GSS-API functions in a manner independent of the underlying transport protocol and depends on its calling application to transport its tokens between peers. Before the context establishment phase is initiated, the context initiator may request specific characteristics desired of the established context. These can be set using the set methods. After the context is established, the caller can check the actual characteristic and services offered by the context using the query methods.
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   The context establishment phase begins with the first call to the
   init method by the context initiator.  During this phase the
   initSecContext and acceptSecContext methods will produce GSS-API
   authentication tokens which the calling application needs to send to
   its peer.  If an error occurs at any point, an exception will get
   thrown and the code will start executing in a catch block.  If not,
   the normal flow of code continues and the application can make a call
   to the isEstablished() method.  If this method returns false it
   indicates that a token is needed from its peer in order to continue
   the context establishment phase.  A return value of true signals that
   the local end of the context is established.  This may still require
   that a token be sent to the peer, if one is produced by GSS-API.
   During the context establishment phase, the isProtReady() method may
   be called to determine if the context can be used for the per-message
   operations.  This allows applications to use per-message operations
   on contexts which aren't fully established.

   After the context has been established or the isProtReady() method
   returns "true", the query routines can be invoked to determine the
   actual characteristics and services of the established context.  The
   application can also start using the per-message methods of wrap and
   getMIC to obtain cryptographic operations on application supplied
   data.

   When the context is no longer needed, the application should call
   dispose to release any system resources the context may be using.

6.4.1. Example Code

The example code presented below demonstrates the usage of the GSSContext interface for the initiating peer. Different operations on the GSSContext object are presented, including: object instantiation, setting of desired flags, context establishment, query of actual context flags, per-message operations on application data, and finally context deletion. GSSManager mgr = GSSManager.getInstance(); // start by creating the name for a service entity GSSName targetName = mgr.createName("service@host", GSSName.NT_HOSTBASED_SERVICE); // create a context using default credentials for the above entity // and the implementation specific default mechanism GSSContext context = mgr.createContext(targetName, null, /* default mechanism */ null, /* default credentials */ GSSContext.INDEFINITE_LIFETIME);
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   // set desired context options - all others are false by default
   context.requestConf(true);
   context.requestMutualAuth(true);
   context.requestReplayDet(true);
   context.requestSequenceDet(true);

   // establish a context between peers - using byte arrays
   byte []inTok = new byte[0];

   try {
           do {
                   byte[] outTok = context.initSecContext(inTok, 0,
                                                     inTok.length);

                   // send the token if present
                   if (outTok != null)
                           sendToken(outTok);

                   // check if we should expect more tokens
                   if (context.isEstablished())
                           break;

                   // another token expected from peer
                   inTok = readToken();

           } while (true);

   } catch (GSSException e) {
           print("GSSAPI error: " + e.getMessage());
   }


   // display context information
   print("Remaining lifetime in seconds = " + context.getLifetime());
   print("Context mechanism = " + context.getMech().toString());
   print("Initiator = " + context.getSrcName().toString());
   print("Acceptor = " + context.getTargName().toString());

   if (context.getConfState())
           print("Confidentiality security service available");

   if (context.getIntegState())
           print("Integrity security service available");

   // perform wrap on an application supplied message, appMsg,
   // using QOP = 0, and requesting privacy service
   byte [] appMsg ...
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   MessageProp mProp = new MessageProp(0, true);

   byte []tok = context.wrap(appMsg, 0, appMsg.length, mProp);

   if (mProp.getPrivacy())
           print("Message protected with privacy.");

   sendToken(tok);


   // release the local-end of the context
   context.dispose();

6.4.2. Static Constants

public static final int DEFAULT_LIFETIME A lifetime constant representing the default context lifetime. This value must be set to 0. public static final int INDEFINITE_LIFETIME A lifetime constant representing indefinite context lifetime. This value must be set to the maximum integer value in Java - Integer.MAX_VALUE.

6.4.3. initSecContext

public byte[] initSecContext(byte inputBuf[], int offset, int len) throws GSSException Called by the context initiator to start the context creation process. This is equivalent to the stream based method except that the token buffers are handled as byte arrays instead of using stream objects. This method may return an output token which the application will need to send to the peer for processing by the accept call. Typically, the application would do so by calling the flush() method on an OutputStream that encapsulates the connection between the two peers. The application can call isEstablished() to determine if the context establishment phase is complete for this peer. A return value of "false" from isEstablished() indicates that more tokens are expected to be supplied to the initSecContext() method. Note that it is possible that the initSecContext() method return a token for the peer, and isEstablished() return "true" also. This indicates that the token needs to be sent to the peer, but the local end of the context is now fully established.
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   Upon completion of the context establishment, the available context
   options may be queried through the get methods.

   Parameters:

      inputBuf  Token generated by the peer. This parameter is ignored
                on the first call.

      offset    The offset within the inputBuf where the token begins.

      len       The length of the token within the inputBuf (starting
                at the offset).

6.4.3.1. Example Code
// Create a new GSSContext implementation object. // GSSContext wrapper implements interface GSSContext. GSSContext context = mgr.createContext(...); byte []inTok = new byte[0]; try { do { byte[] outTok = context.initSecContext(inTok, 0, inTok.length); // send the token if present if (outTok != null) sendToken(outTok); // check if we should expect more tokens if (context.isEstablished()) break; // another token expected from peer inTok = readToken(); } while (true); } catch (GSSException e) { print("GSSAPI error: " + e.getMessage()); }
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6.4.4. initSecContext

public int initSecContext(InputStream inStream, OutputStream outStream) throws GSSException Called by the context initiator to start the context creation process. This is equivalent to the byte array based method. This method may write an output token to the outStream, which the application will need to send to the peer for processing by the accept call. Typically, the application would do so by calling the flush() method on an OutputStream that encapsulates the connection between the two peers. The application can call isEstablished() to determine if the context establishment phase is complete for this peer. A return value of "false" from isEstablished indicates that more tokens are expected to be supplied to the initSecContext method. Note that it is possible that the initSecContext() method return a token for the peer, and isEstablished() return "true" also. This indicates that the token needs to be sent to the peer, but the local end of the context is now fully established. The GSS-API authentication tokens contain a definitive start and end. This method will attempt to read one of these tokens per invocation, and may block on the stream if only part of the token is available. Upon completion of the context establishment, the available context options may be queried through the get methods. Parameters: inStream Contains the token generated by the peer. This parameter is ignored on the first call. outStream Output stream where the output token will be written. During the final stage of context establishment, there may be no bytes written.
6.4.4.1. Example Code
This sample code merely demonstrates the token exchange during the context establishment phase. It is expected that most Java applications will use custom implementations of the Input and Output streams that encapsulate the communication routines. For instance, a simple read on the application InputStream, when called by the Context, might cause a token to be read from the peer, and a simple flush() on the application OutputStream might cause a previously written token to be transmitted to the peer. // Create a new GSSContext implementation object.
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   // GSSContext wrapper implements interface GSSContext.
   GSSContext context = mgr.createContext(...);

   // use standard java.io stream objects
   ByteArrayOutputStream os = new ByteArrayOutputStream();
   ByteArrayInputStream is = null;


   try {

           do {
                   context.initSecContext(is, os);

                   // send token if present
                   if (os.size() > 0)
                           sendToken(os);

                   // check if we should expect more tokens
                   if (context.isEstablished())
                           break;

                   // another token expected from peer
                   is = recvToken();

           } while (true);

   } catch (GSSException e) {
           print("GSSAPI error: " + e.getMessage());
   }

6.4.5. acceptSecContext

public byte[] acceptSecContext(byte inTok[], int offset, int len) throws GSSException Called by the context acceptor upon receiving a token from the peer. This call is equivalent to the stream based method except that the token buffers are handled as byte arrays instead of using stream objects. This method may return an output token which the application will need to send to the peer for further processing by the init call. "null" return value indicates that no token needs to be sent to the peer. The application can call isEstablished() to determine if the context establishment phase is complete for this peer. A return value of "false" from isEstablished() indicates that more tokens are expected to be supplied to this method.
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   Note that it is possible that acceptSecContext() return a token for
   the peer, and isEstablished() return "true" also.  This indicates
   that the token needs to be sent to the peer, but the local end of the
   context is now fully established.

   Upon completion of the context establishment, the available context
   options may be queried through the get methods.

   Parameters:

      inTok     Token generated by the peer.

      offset    The offset within the inTok where the token begins.

      len       The length of the token within the inTok (starting at
                the offset).

6.4.5.1. Example Code
// acquire server credentials GSSCredential server = mgr.createCredential(...); // create acceptor GSS-API context from the default provider GSSContext context = mgr.createContext(server, null); try { do { byte [] inTok = readToken(); byte []outTok = context.acceptSecContext(inTok, 0, inTok.length); // possibly send token to peer if (outTok != null) sendToken(outTok); // check if local context establishment is complete if (context.isEstablished()) break; } while (true); } catch (GSSException e) { print("GSS-API error: " + e.getMessage()); }
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6.4.6. acceptSecContext

public void acceptSecContext(InputStream inStream, OutputStream outStream) throws GSSException Called by the context acceptor upon receiving a token from the peer. This call is equivalent to the byte array method. It may write an output token to the outStream, which the application will need to send to the peer for processing by its initSecContext method. Typically, the application would do so by calling the flush() method on an OutputStream that encapsulates the connection between the two peers. The application can call isEstablished() to determine if the context establishment phase is complete for this peer. A return value of "false" from isEstablished() indicates that more tokens are expected to be supplied to this method. Note that it is possible that acceptSecContext() return a token for the peer, and isEstablished() return "true" also. This indicates that the token needs to be sent to the peer, but the local end of the context is now fully established. The GSS-API authentication tokens contain a definitive start and end. This method will attempt to read one of these tokens per invocation, and may block on the stream if only part of the token is available. Upon completion of the context establishment, the available context options may be queried through the get methods. Parameters: inStream Contains the token generated by the peer. outStream Output stream where the output token will be written. During the final stage of context establishment, there may be no bytes written.
6.4.6.1. Example Code
This sample code merely demonstrates the token exchange during the context establishment phase. It is expected that most Java applications will use custom implementations of the Input and Output streams that encapsulate the communication routines. For instance, a simple read on the application InputStream, when called by the Context, might cause a token to be read from the peer, and a simple flush() on the application OutputStream might cause a previously written token to be transmitted to the peer. // acquire server credentials
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   GSSCredential server = mgr.createCredential(...);

   // create acceptor GSS-API context from the default provider
   GSSContext context = mgr.createContext(server, null);

   // use standard java.io stream objects
   ByteArrayOutputStream os = new ByteArrayOutputStream();
   ByteArrayInputStream is = null;

   try {
           do {

                   is = recvToken();

                   context.acceptSecContext(is, os);

                   // possibly send token to peer
                   if (os.size() > 0)
                           sendToken(os);

                   // check if local context establishment is complete
                   if (context.isEstablished())
                           break;
           } while (true);

   } catch (GSSException e) {
           print("GSS-API error: " + e.getMessage());
   }

6.4.7. isEstablished

public boolean isEstablished() Used during context establishment to determine the state of the context. Returns "true" if this is a fully established context on the caller's side and no more tokens are needed from the peer. Should be called after a call to initSecContext() or acceptSecContext() when no GSSException is thrown.

6.4.8. dispose

public void dispose() throws GSSException Releases any system resources and cryptographic information stored in the context object. This will invalidate the context.
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6.4.9. getWrapSizeLimit

public int getWrapSizeLimit(int qop, boolean confReq, int maxTokenSize) throws GSSException Returns the maximum message size that, if presented to the wrap method with the same confReq and qop parameters, will result in an output token containing no more than the maxTokenSize bytes. This call is intended for use by applications that communicate over protocols that impose a maximum message size. It enables the application to fragment messages prior to applying protection. GSS-API implementations are recommended but not required to detect invalid QOP values when getWrapSizeLimit is called. This routine guarantees only a maximum message size, not the availability of specific QOP values for message protection. Successful completion of this call does not guarantee that wrap will be able to protect a message of the computed length, since this ability may depend on the availability of system resources at the time that wrap is called. However, if the implementation itself imposes an upper limit on the length of messages that may be processed by wrap, the implementation should not return a value that is greater than this length. Parameters: qop Indicates the level of protection wrap will be asked to provide. confReq Indicates if wrap will be asked to provide privacy service. maxTokenSize The desired maximum size of the token emitted by wrap.

6.4.10. wrap

public byte[] wrap(byte inBuf[], int offset, int len, MessageProp msgProp) throws GSSException Applies per-message security services over the established security context. The method will return a token with a cryptographic MIC and may optionally encrypt the specified inBuf. This method is equivalent in functionality to its stream counterpart. The returned byte array will contain both the MIC and the message.
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   The MessageProp object is instantiated by the application and used to
   specify a QOP value which selects cryptographic algorithms, and a
   privacy service to optionally encrypt the message.  The underlying
   mechanism that is used in the call may not be able to provide the
   privacy service.  It sets the actual privacy service that it does
   provide in this MessageProp object which the caller should then query
   upon return.  If the mechanism is not able to provide the requested
   QOP, it throws a GSSException with the BAD_QOP code.

   Since some application-level protocols may wish to use tokens emitted
   by wrap to provide "secure framing", implementations should support
   the wrapping of zero-length messages.

   The application will be responsible for sending the token to the
   peer.

   Parameters:

      inBuf     Application data to be protected.

      offset    The offset within the inBuf where the data begins.

      len       The length of the data within the inBuf (starting at
                the offset).

      msgProp   Instance of MessageProp that is used by the
                application to set the desired QOP and privacy state.
                Set the desired QOP to 0 to request the default QOP.
                Upon return from this method, this object will contain
                the the actual privacy state that was applied to the
                message by the underlying mechanism.

6.4.11. wrap

public void wrap(InputStream inStream, OutputStream outStream, MessageProp msgProp) throws GSSException Allows to apply per-message security services over the established security context. The method will produce a token with a cryptographic MIC and may optionally encrypt the message in inStream. The outStream will contain both the MIC and the message. The MessageProp object is instantiated by the application and used to specify a QOP value which selects cryptographic algorithms, and a privacy service to optionally encrypt the message. The underlying mechanism that is used in the call may not be able to provide the privacy service. It sets the actual privacy service that it does
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   provide in this MessageProp object which the caller should then query
   upon return.  If the mechanism is not able to provide the requested
   QOP, it throws a GSSException with the BAD_QOP code.

   Since some application-level protocols may wish to use tokens emitted
   by wrap to provide "secure framing", implementations should support
   the wrapping of zero-length messages.

   The application will be responsible for sending the token to the
   peer.

   Parameters:

      inStream  Input stream containing the application data to be
                protected.

      outStream The output stream to write the protected message to.
                The application is responsible for sending this to the
                other peer for processing in its unwrap method.

      msgProp   Instance of MessageProp that is used by the
                application to set the desired QOP and privacy state.
                Set the desired QOP to 0 to request the default QOP.
                Upon return from this method, this object will contain
                the the actual privacy state that was applied to the
                message by the underlying mechanism.

6.4.12. unwrap

public byte [] unwrap(byte[] inBuf, int offset, int len, MessageProp msgProp) throws GSSException Used by the peer application to process tokens generated with the wrap call. This call is equal in functionality to its stream counterpart. The method will return the message supplied in the peer application to the wrap call, verifying the embedded MIC. The MessageProp object is instantiated by the application and is used by the underlying mechanism to return information to the caller such as the QOP, whether confidentiality was applied to the message, and other supplementary message state information. Since some application-level protocols may wish to use tokens emitted by wrap to provide "secure framing", implementations should support the wrapping and unwrapping of zero-length messages.
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   Parameters:

      inBuf     GSS-API wrap token received from peer.

      offset    The offset within the inBuf where the token begins.

      len       The length of the token within the inBuf (starting at
                the offset).

      msgProp   Upon return from the method, this object will contain
                the applied QOP, the privacy state of the message, and
                supplementary information described in 4.12.3 stating
                whether the token was a duplicate, old, out of
                sequence or arriving after a gap.

6.4.13. unwrap

public void unwrap(InputStream inStream, OutputStream outStream, MessageProp msgProp) throws GSSException Used by the peer application to process tokens generated with the wrap call. This call is equal in functionality to its byte array counterpart. It will produce the message supplied in the peer application to the wrap call, verifying the embedded MIC. The MessageProp object is instantiated by the application and is used by the underlying mechanism to return information to the caller such as the QOP, whether confidentiality was applied to the message, and other supplementary message state information. Since some application-level protocols may wish to use tokens emitted by wrap to provide "secure framing", implementations should support the wrapping and unwrapping of zero-length messages. Parameters: inStream Input stream containing the GSS-API wrap token received from the peer. outStream The output stream to write the application message to. msgProp Upon return from the method, this object will contain the applied QOP, the privacy state of the message, and supplementary information described in 4.12.3 stating whether the token was a duplicate, old, out of sequence or arriving after a gap.
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6.4.14. getMIC

public byte[] getMIC(byte []inMsg, int offset, int len, MessageProp msgProp) throws GSSException Returns a token containing a cryptographic MIC for the supplied message, for transfer to the peer application. Unlike wrap, which encapsulates the user message in the returned token, only the message MIC is returned in the output token. This method is identical in functionality to its stream counterpart. Note that privacy can only be applied through the wrap call. Since some application-level protocols may wish to use tokens emitted by getMIC to provide "secure framing", implementations should support derivation of MICs from zero-length messages. Parameters: inMsg Message to generate MIC over. offset The offset within the inMsg where the token begins. len The length of the token within the inMsg (starting at the offset). msgProp Instance of MessageProp that is used by the application to set the desired QOP. Set the desired QOP to 0 in msgProp to request the default QOP. Alternatively pass in "null" for msgProp to request default QOP.

6.4.15. getMIC

public void getMIC(InputStream inStream, OutputStream outStream, MessageProp msgProp) throws GSSException Produces a token containing a cryptographic MIC for the supplied message, for transfer to the peer application. Unlike wrap, which encapsulates the user message in the returned token, only the message MIC is produced in the output token. This method is identical in functionality to its byte array counterpart. Note that privacy can only be applied through the wrap call. Since some application-level protocols may wish to use tokens emitted by getMIC to provide "secure framing", implementations should support derivation of MICs from zero-length messages.
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   Parameters:

      inStream  inStream  Input stream containing the message to
                generate MIC over.

      outStream outStream Output stream to write the GSS-API output
                token to.

      msgProp   Instance of MessageProp that is used by the
                application to set the desired QOP.  Set the desired
                QOP to 0 in msgProp to request the default QOP.
                Alternatively pass in "null" for msgProp to request
                default QOP.

6.4.16. verifyMIC

public void verifyMIC(byte []inTok, int tokOffset, int tokLen, byte[] inMsg, int msgOffset, int msgLen, MessageProp msgProp) throws GSSException Verifies the cryptographic MIC, contained in the token parameter, over the supplied message. This method is equivalent in functionality to its stream counterpart. The MessageProp object is instantiated by the application and is used by the underlying mechanism to return information to the caller such as the QOP indicating the strength of protection that was applied to the message and other supplementary message state information. Since some application-level protocols may wish to use tokens emitted by getMIC to provide "secure framing", implementations should support the calculation and verification of MICs over zero-length messages. Parameters: inTok Token generated by peer's getMIC method. tokOffset The offset within the inTok where the token begins. tokLen The length of the token within the inTok (starting at the offset). inMsg Application message to verify the cryptographic MIC over. msgOffset The offset within the inMsg where the message begins.
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      msgLen    The length of the message within the inMsg (starting
                at the offset).

      msgProp   Upon return from the method, this object will contain
                the applied QOP and supplementary information
                described in 4.12.3 stating whether the token was a
                duplicate, old, out of sequence or arriving after a
                gap.  The confidentiality state will be set to
                "false".

6.4.17. verifyMIC

public void verifyMIC(InputStream tokStream, InputStream msgStream, MessageProp msgProp) throws GSSException Verifies the cryptographic MIC, contained in the token parameter, over the supplied message. This method is equivalent in functionality to its byte array counterpart. The MessageProp object is instantiated by the application and is used by the underlying mechanism to return information to the caller such as the QOP indicating the strength of protection that was applied to the message and other supplementary message state information. Since some application-level protocols may wish to use tokens emitted by getMIC to provide "secure framing", implementations should support the calculation and verification of MICs over zero-length messages. Parameters: tokStream Input stream containing the token generated by peer's getMIC method. msgStream Input stream containing the application message to verify the cryptographic MIC over. msgProp Upon return from the method, this object will contain the applied QOP and supplementary information described in 4.12.3 stating whether the token was a duplicate, old, out of sequence or arriving after a gap. The confidentiality state will be set to "false".
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6.4.18. export

public byte [] export() throws GSSException Provided to support the sharing of work between multiple processes. This routine will typically be used by the context-acceptor, in an application where a single process receives incoming connection requests and accepts security contexts over them, then passes the established context to one or more other processes for message exchange. This method deactivates the security context and creates an interprocess token which, when passed to the byte array constructor of the GSSContext interface in another process, will re-activate the context in the second process. Only a single instantiation of a given context may be active at any one time; a subsequent attempt by a context exporter to access the exported security context will fail. The implementation may constrain the set of processes by which the interprocess token may be imported, either as a function of local security policy, or as a result of implementation decisions. For example, some implementations may constrain contexts to be passed only between processes that run under the same account, or which are part of the same process group. The interprocess token may contain security-sensitive information (for example cryptographic keys). While mechanisms are encouraged to either avoid placing such sensitive information within interprocess tokens, or to encrypt the token before returning it to the application, in a typical GSS-API implementation this may not be possible. Thus the application must take care to protect the interprocess token, and ensure that any process to which the token is transferred is trustworthy.

6.4.19. requestMutualAuth

public void requestMutualAuth(boolean state) throws GSSException Sets the request state of the mutual authentication flag for the context. This method is only valid before the context creation process begins and only for the initiator. Parameters: state Boolean representing if mutual authentication should be requested during context establishment.
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6.4.20. requestReplayDet

public void requestReplayDet(boolean state) throws GSSException Sets the request state of the replay detection service for the context. This method is only valid before the context creation process begins and only for the initiator. Parameters: state Boolean representing if replay detection is desired over the established context.

6.4.21. requestSequenceDet

public void requestSequenceDet(boolean state) throws GSSException Sets the request state for the sequence checking service of the context. This method is only valid before the context creation process begins and only for the initiator. Parameters: state Boolean representing if sequence detection is desired over the established context.

6.4.22. requestCredDeleg

public void requestCredDeleg(boolean state) throws GSSException Sets the request state for the credential delegation flag for the context. This method is only valid before the context creation process begins and only for the initiator. Parameters: state Boolean representing if credential delegation is desired.

6.4.23. requestAnonymity

public void requestAnonymity(boolean state) throws GSSException Requests anonymous support over the context. This method is only valid before the context creation process begins and only for the initiator.
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   Parameters:

      state     Boolean representing if anonymity support is
                requested.

6.4.24. requestConf

public void requestConf(boolean state) throws GSSException Requests that confidentiality service be available over the context. This method is only valid before the context creation process begins and only for the initiator. Parameters: state Boolean indicating if confidentiality services are to be requested for the context.

6.4.25. requestInteg

public void requestInteg(boolean state) throws GSSException Requests that integrity services be available over the context. This method is only valid before the context creation process begins and only for the initiator. Parameters: state Boolean indicating if integrity services are to be requested for the context.

6.4.26. requestLifetime

public void requestLifetime(int lifetime) throws GSSException Sets the desired lifetime for the context in seconds. This method is only valid before the context creation process begins and only for the initiator. Use GSSContext.INDEFINITE_LIFETIME and GSSContext.DEFAULT_LIFETIME to request indefinite or default context lifetime. Parameters: lifetime The desired context lifetime in seconds.
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6.4.27. setChannelBinding

public void setChannelBinding(ChannelBinding cb) throws GSSException Sets the channel bindings to be used during context establishment. This method is only valid before the context creation process begins. Parameters: cb Channel bindings to be used.

6.4.28. getCredDelegState

public boolean getCredDelegState() Returns the state of the delegated credentials for the context. When issued before context establishment is completed or when the isProtReady method returns "false", it returns the desired state, otherwise it will indicate the actual state over the established context.

6.4.29. getMutualAuthState

public boolean getMutualAuthState() Returns the state of the mutual authentication option for the context. When issued before context establishment completes or when the isProtReady method returns "false", it returns the desired state, otherwise it will indicate the actual state over the established context.

6.4.30. getReplayDetState

public boolean getReplayDetState() Returns the state of the replay detection option for the context. When issued before context establishment completes or when the isProtReady method returns "false", it returns the desired state, otherwise it will indicate the actual state over the established context.

6.4.31. getSequenceDetState

public boolean getSequenceDetState() Returns the state of the sequence detection option for the context. When issued before context establishment completes or when the isProtReady method returns "false", it returns the desired state,
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   otherwise it will indicate the actual state over the established
   context.

6.4.32. getAnonymityState

public boolean getAnonymityState() Returns "true" if this is an anonymous context. When issued before context establishment completes or when the isProtReady method returns "false", it returns the desired state, otherwise it will indicate the actual state over the established context.

6.4.33. isTransferable

public boolean isTransferable() throws GSSException Returns "true" if the context is transferable to other processes through the use of the export method. This call is only valid on fully established contexts.

6.4.34. isProtReady

public boolean isProtReady() Returns "true" if the per message operations can be applied over the context. Some mechanisms may allow the usage of per-message operations before the context is fully established. This will also indicate that the get methods will return actual context state characteristics instead of the desired ones.

6.4.35. getConfState

public boolean getConfState() Returns the confidentiality service state over the context. When issued before context establishment completes or when the isProtReady method returns "false", it returns the desired state, otherwise it will indicate the actual state over the established context.

6.4.36. getIntegState

public boolean getIntegState() Returns the integrity service state over the context. When issued before context establishment completes or when the isProtReady method returns "false", it returns the desired state, otherwise it will indicate the actual state over the established context.
ToP   noToC   RFC2853 - Page 73

6.4.37. getLifetime

public int getLifetime() Returns the context lifetime in seconds. When issued before context establishment completes or when the isProtReady method returns "false", it returns the desired lifetime, otherwise it will indicate the remaining lifetime for the context.

6.4.38. getSrcName

public GSSName getSrcName() throws GSSException Returns the name of the context initiator. This call is valid only after the context is fully established or the isProtReady method returns "true". It is guaranteed to return an MN.

6.4.39. getTargName

public GSSName getTargName() throws GSSException Returns the name of the context target (acceptor). This call is valid only after the context is fully established or the isProtReady method returns "true". It is guaranteed to return an MN.

6.4.40. getMech

public Oid getMech() throws GSSException Returns the mechanism oid for this context. This method may be called before the context is fully established, but the mechanism returned may change on successive calls in negotiated mechanism case.

6.4.41. getDelegCred

public GSSCredential getDelegCred() throws GSSException Returns the delegated credential object on the acceptor's side. To check for availability of delegated credentials call getDelegCredState. This call is only valid on fully established contexts.

6.4.42. isInitiator

public boolean isInitiator() throws GSSException Returns "true" if this is the initiator of the context. This call is only valid after the context creation process has started.


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