GSS_INQUIRE_CONTEXT(3)

NAME
gss_inquire_context - Obtain information about a security context

SYNOPSIS
#include <gssapi/gssapi.h>
OM_uint32
gss_inquire_context(OM_uint32 *minor_status, const gss_ctx_id_t context_handle, gss_name_t *src_name, gss_name_t *targ_name, OM_uint32 *lifetime_rec, gss_OID *mech_type, OM_uint32 *ctx_flags, int *locally_initiated, int *open);

DESCRIPTION
Obtains information about a security context. The caller must already have obtained a handle that refers to the context, although the context need not be fully established.

PARAMETERS

minor_status
    Mechanism specific status code.

context_handle
    A handle that refers to the security context.

src_name
    The name of the context initiator. If the context was established using anonymous authentication, and if the application invoking gss_inquire_context() is the context acceptor, an anonymous name will be returned. Storage associated with this name must be freed by the application after use with a call to gss_release_name(). Specify NULL if not required.

targ_name
    The name of the context acceptor. Storage associated with this name must be freed by the application after use with a call to gss_release_name(). If the context acceptor did not authenticate itself, and if the initiator did not specify a target name in its call to gss_init_sec_context(), the value GSS_C_NO_NAME will be returned. Specify NULL if not required.

lifetime_rec
    The number of seconds for which the context will remain valid. If the context has expired, this parameter will be set to zero. If the implementation does not support context expiration, the value GSS_C_INDEFINITE will be returned. Specify NULL if not required.

mech_type
    The security mechanism providing the context. The returned OID will be a pointer to static storage that should be treated as read-only by the application; in particular the application should not attempt to free it. Specify NULL if not required.

ctx_flags
    Contains various independent flags, each of which indicates that the context supports (or is expected to support, if open is false) a specific service option. If not needed, specify NULL. Symbolic names are provided for each flag, and the symbolic names corresponding to the required flags should be logically-ANDed with the ctx_flags value to test whether a given option is supported by the context. The flags are:

    GSS_C_DELEG_FLAG

        True
            Credentials were delegated from the initiator to the acceptor.

        False
            No credentials were delegated.

    GSS_C_MUTUAL_FLAG

        True
            The acceptor was authenticated to the initiator.

        False
            The acceptor did not authenticate itself.

    GSS_C_REPLAY_FLAG

        True
            Replay of protected messages will be detected.

        False
            Replayed messages will not be detected.

    GSS_C_SEQUENCE_FLAG

        True
            Out-of-sequence protected messages will be detected.

        False
            Out-of-sequence messages will not be detected.

    GSS_C_CONF_FLAG

        True
            Confidentiality service may be invoked by calling gss_wrap() routine.

        False
            No confidentiality service (via gss_wrap()) available. gss_wrap() will provide message encapsulation, data-origin authentication and integrity services only.

    GSS_C_INTEG_FLAG

        True
            Integrity service may be invoked by calling either gss_get_mic() or gss_wrap() routines.

        False
            Per-message integrity service unavailable.

    GSS_C_ANON_FLAG

        True
            The initiator's identity will not be revealed to the acceptor. The src_name parameter (if requested) contains an anonymous internal name.

        False
            The initiator has been authenticated normally.

    GSS_C_PROT_READY_FLAG

        True
            Protection services (as specified by the states of the GSS_C_CONF_FLAG and GSS_C_INTEG_FLAG) are available for use.

        False
            Protection services (as specified by the states of the GSS_C_CONF_FLAG and GSS_C_INTEG_FLAG) are available only if the context is fully established (i.e. if the open parameter is non-zero).

    GSS_C_TRANS_FLAG

        True
            The security context may be transferred to other processes via a call to gss_export_sec_context().

        False
            The security context is not transferable.

locally_initiated
    Non-zero if the invoking application is the context initiator. Specify NULL if not required.

open
    Non-zero if the context is fully established; Zero if a context-establishment token is expected from the peer application. Specify NULL if not required.

RETURN VALUES

GSS_S_COMPLETE
    Successful completion

GSS_S_NO_CONTEXT
    The referenced context could not be accessed

SEE ALSO
gss_release_name(3), gss_init_sec_context(3), gss_wrap(3), gss_get_mic(3), gss_export_sec_context(3)

STANDARDS

RFC 2743
    Generic Security Service Application Program Interface Version 2, Update 1

RFC 2744
    Generic Security Service API Version 2 : C-bindings

HISTORY
The gss_inquire_context function first appeared in FreeBSD 7.0.

AUTHORS
John Wray, Iris Associates

COPYRIGHT
Copyright (C) The Internet Society (2000). All Rights Reserved.

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