gss_acquire_cred man page on DragonFly
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gss_acquire_cred(3) gss gss_acquire_cred(3)
NAME
gss_acquire_cred - API function
SYNOPSIS
#include <gss.h>
OM_uint32 gss_acquire_cred(OM_uint32 * minor_status, const gss_name_t
desired_name, OM_uint32 time_req, const gss_OID_set desired_mechs,
gss_cred_usage_t cred_usage, gss_cred_id_t * output_cred_handle,
gss_OID_set * actual_mechs, OM_uint32 * time_rec);
ARGUMENTS
OM_uint32 * minor_status
(integer, modify) Mechanism specific status code.
const gss_name_t desired_name
(gss_name_t, read) Name of principal whose
credential should be acquired.
OM_uint32 time_req
(Integer, read, optional) Number of seconds that
credentials should remain valid. Specify GSS_C_INDEFINITE
to
request that the credentials have the maximum permitted
lifetime.
const gss_OID_set desired_mechs
(Set of Object IDs, read, optional) Set of
underlying security mechanisms that may be used.
GSS_C_NO_OID_SET may be used to obtain an implementa‐
tion-specific
default.
gss_cred_usage_t cred_usage
(gss_cred_usage_t, read) GSS_C_BOTH - Credentials may
be used either to initiate or accept security contexts.
GSS_C_INITIATE - Credentials will only be used to initi‐
ate
security contexts. GSS_C_ACCEPT - Credentials will only
be used
to accept security contexts.
gss_cred_id_t * output_cred_handle
(gss_cred_id_t, modify) The returned
credential handle. Resources associated with this cre‐
dential
handle must be released by the application after use with
a call
to gss_release_cred().
gss_OID_set * actual_mechs
(Set of Object IDs, modify, optional) The set of
mechanisms for which the credential is valid. Storage
associated
with the returned OID-set must be released by the appli‐
cation
after use with a call to gss_release_oid_set(). Specify
NULL if
not required.
OM_uint32 * time_rec
(Integer, modify, optional) Actual number of seconds for
which the returned credentials will remain valid. If the
implementation does not support expiration of creden‐
tials, the
value GSS_C_INDEFINITE will be returned. Specify NULL if
not
required.
DESCRIPTION
Allows an application to acquire a handle for a pre-existing credential
by name. GSS-API implementations must impose a local access-control
policy on callers of this routine to prevent unauthorized callers from
acquiring credentials to which they are not entitled. This routine is
not intended to provide a "login to the network" function, as such a
function would involve the creation of new credentials rather than
merely acquiring a handle to existing credentials. Such functions, if
required, should be defined in implementation-specific extensions to
the API.
If desired_name is GSS_C_NO_NAME, the call is interpreted as a request
for a credential handle that will invoke default behavior when passed
to gss_init_sec_context() (if cred_usage is GSS_C_INITIATE or
GSS_C_BOTH) or gss_accept_sec_context() (if cred_usage is GSS_C_ACCEPT
or GSS_C_BOTH).
Mechanisms should honor the desired_mechs parameter, and return a cre‐
dential that is suitable to use only with the requested mechanisms. An
exception to this is the case where one underlying credential element
can be shared by multiple mechanisms; in this case it is permissible
for an implementation to indicate all mechanisms with which the creden‐
tial element may be used. If desired_mechs is an empty set, behavior
is undefined.
This routine is expected to be used primarily by context acceptors,
since implementations are likely to provide mechanism-specific ways of
obtaining GSS-API initiator credentials from the system login process.
Some implementations may therefore not support the acquisition of
GSS_C_INITIATE or GSS_C_BOTH credentials via gss_acquire_cred for any
name other than GSS_C_NO_NAME, or a name produced by applying either
gss_inquire_cred to a valid credential, or gss_inquire_context to an
active context.
If credential acquisition is time-consuming for a mechanism, the mecha‐
nism may choose to delay the actual acquisition until the credential is
required (e.g. by gss_init_sec_context or gss_accept_sec_context).
Such mechanism-specific implementation decisions should be invisible to
the calling application; thus a call of gss_inquire_cred immediately
following the call of gss_acquire_cred must return valid credential
data, and may therefore incur the overhead of a deferred credential
acquisition.
RETURN VALUE
`GSS_S_COMPLETE`: Successful completion.
`GSS_S_BAD_MECH`: Unavailable mechanism requested.
`GSS_S_BAD_NAMETYPE`: Type contained within desired_name parameter is
not supported.
`GSS_S_BAD_NAME`: Value supplied for desired_name parameter is ill
formed.
`GSS_S_CREDENTIALS_EXPIRED`: The credentials could not be acquired
Because they have expired.
`GSS_S_NO_CRED`: No credentials were found for the specified name.
REPORTING BUGS
Report bugs to <bug-gss@gnu.org>. GNU Generic Security Service home
page: http://www.gnu.org/software/gss/ General help using GNU software:
http://www.gnu.org/gethelp/
COPYRIGHT
Copyright © 2003-2013 Simon Josefsson.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
SEE ALSO
The full documentation for gss is maintained as a Texinfo manual. If
the info and gss programs are properly installed at your site, the com‐
mand
info gss
should give you access to the complete manual.
gss 1.0.3 gss_acquire_cred(3)
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