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.\" Copyright (c) 2005 Doug Rabson
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.\" The following commands are required for all man pages.
.Dd January 26, 2010
.Dt GSS_EXPORT_SEC_CONTEXT 3 PRM
.Nd Transfer a security context to another process
.\" This next command is for sections 2 and 3 only.
.\" .Sh LIBRARY
.Fa "OM_uint32 *minor_status"
.Fa "gss_ctx_id_t *context_handle"
.Fa "gss_buffer_t interprocess_token"
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
deactivates the security context for the calling process and creates
an interprocess token which,
when passed to
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
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.
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 object-library GSS-API implementation this may not be
Thus the application must take care to protect the interprocess token,
and ensure that any process to which the token is transferred is
If creation of the interprocess token is successful,
the implementation shall deallocate all process-wide resources
associated with the security context,
and set the context_handle to
.Dv GSS_C_NO_CONTEXT .
In the event of an error that makes it impossible to complete the
export of the security context,
the implementation must not return an interprocess token,
and should strive to leave the security context referenced by the
If this is impossible,
it is permissible for the implementation to delete the security
providing it also sets the
.Dv GSS_C_NO_CONTEXT .
.Bl -tag -width ".It interprocess_token"
Mechanism specific status code.
Context handle identifying the context to transfer.
Token to be transferred to target process.
Storage associated with this token must be freed by the application
after use with a call to
.Fn gss_release_buffer .
.Sh RETURN VALUES
.Bl -tag -width ".It GSS_S_CONTEXT_EXPIRED"
The context has expired
The context was invalid
The operation is not supported
.Sh SEE ALSO
.Xr gss_import_sec_context 3 ,
.Xr gss_release_buffer 3
.Bl -tag -width ".It RFC 2743"
.It RFC 2743
Generic Security Service Application Program Interface Version 2, Update 1
.It RFC 2744
Generic Security Service API Version 2 : C-bindings
function first appeared in
.Fx 7.0 .
John Wray, Iris Associates
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