NAME
krb5_copy_host_realm,
krb5_free_host_realm,
krb5_get_default_realm,
krb5_get_default_realms,
krb5_get_host_realm,
krb5_set_default_realm —
default and
host realm read and manipulation routines
LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
SYNOPSIS
#include <krb5/krb5.h>
krb5_error_code
krb5_copy_host_realm(
krb5_context
context,
const krb5_realm *from,
krb5_realm **to);
krb5_error_code
krb5_free_host_realm(
krb5_context
context,
krb5_realm *realmlist);
krb5_error_code
krb5_get_default_realm(
krb5_context
context,
krb5_realm *realm);
krb5_error_code
krb5_get_default_realms(
krb5_context
context,
krb5_realm **realm);
krb5_error_code
krb5_get_host_realm(
krb5_context
context,
const char *host,
krb5_realm **realms);
krb5_error_code
krb5_set_default_realm(
krb5_context
context,
const char *realm);
DESCRIPTION
krb5_copy_host_realm() copies the list of realms from
from to
to.
to should be freed by the caller using
krb5_free_host_realm.
krb5_free_host_realm() frees all memory allocated by
realmlist.
krb5_get_default_realm() returns the first default realm for
this host. The realm returned should be freed with
krb5_xfree().
krb5_get_default_realms() returns a
NULL
terminated list of default realms for this
context. Realms returned by
krb5_get_default_realms() should
be freed with
krb5_free_host_realm().
krb5_get_host_realm() returns a
NULL
terminated list of realms for
host by looking up the
information in the
[domain_realm]
in
krb5.conf or in
DNS
. If the mapping
in
[domain_realm]
results in the string
dns_locate
, DNS is used to lookup the realm.
When using
DNS
to a resolve the domain for the host
a.b.c,
krb5_get_host_realm() looks for a
TXT
resource record named
_kerberos.a.b.c
, and if not found, it strips off the
first component and tries a again (_kerberos.b.c) until it reaches the root.
If there is no configuration or DNS information found,
krb5_get_host_realm() assumes it can use the domain part of
the
host to form a realm. Caller must free
realmlist with
krb5_free_host_realm().
krb5_set_default_realm() sets the default realm for the
context. If
NULL
is used as a
realm, the
[libdefaults]default_realm
stanza in
krb5.conf is used. If there is no such stanza in the
configuration file, the
krb5_get_host_realm() function is
used to form a default realm.
SEE ALSO
free(3),
krb5.conf(5)