NAME¶
krb5_get_credentials
,
krb5_get_credentials_with_flags
,
krb5_get_kdc_cred
,
krb5_get_renewed_creds
—
get credentials from the KDC using krbtgt
LIBRARY¶
Kerberos 5 Library (libkrb5, -lkrb5)
SYNOPSIS¶
#include
<krb5.h>
krb5_error_code
krb5_get_credentials
(
krb5_context
context,
krb5_flags options,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_creds **out_creds);
krb5_error_code
krb5_get_credentials_with_flags
(
krb5_context
context,
krb5_flags options,
krb5_kdc_flags flags,
krb5_ccache ccache,
krb5_creds *in_creds,
krb5_creds **out_creds);
krb5_error_code
krb5_get_kdc_cred
(
krb5_context
context,
krb5_ccache id,
krb5_kdc_flags flags,
krb5_addresses *addresses,
Ticket *second_ticket,
krb5_creds *in_creds,
krb5_creds **out_creds);
krb5_error_code
krb5_get_renewed_creds
(
krb5_context
context,
krb5_creds *creds,
krb5_const_principal client,
krb5_ccache ccache,
const char *in_tkt_service);
DESCRIPTION¶
krb5_get_credentials_with_flags
() get
credentials specified by
in_creds->server
and
in_creds->client (the rest of the
in_creds structure is ignored) by first
looking in the
ccache and if doesn't exists
or is expired, fetch the credential from the KDC using the krbtgt in
ccache. The credential is returned in
out_creds and should be freed using the
function
krb5_free_creds
().
Valid flags to pass into
options argument are:
- KRB5_GC_CACHED
- Only check the ccache, don't got out on
network to fetch credential.
- KRB5_GC_USER_USER
- Request a user to user ticket. This option doesn't store the resulting
user to user credential in the
ccache.
- KRB5_GC_EXPIRED_OK
- returns the credential even if it is expired, default behavior is trying
to refetch the credential from the KDC.
Flags are KDCOptions, note the caller must fill
in the bit-field and not use the integer associated structure.
krb5_get_credentials
() works the same way as
krb5_get_credentials_with_flags
() except
that the
flags field is missing.
krb5_get_kdc_cred
() does the same as the
functions above, but the caller must fill in all the information andits closer
to the wire protocol.
krb5_get_renewed_creds
() renews a credential
given by
in_tkt_service (if
NULL
the default
krbtgt
) using the credential cache
ccache. The result is stored in
creds and should be freed using
krb5_free_creds.
EXAMPLES¶
Here is a example function that get a credential from a credential cache
id or the KDC and returns it to the caller.
#include <krb5.h>
int
getcred(krb5_context context, krb5_ccache id, krb5_creds **creds)
{
krb5_error_code ret;
krb5_creds in;
ret = krb5_parse_name(context, "client@EXAMPLE.COM",
&in.client);
if (ret)
krb5_err(context, 1, ret, "krb5_parse_name");
ret = krb5_parse_name(context, "host/server.example.com@EXAMPLE.COM",
&in.server);
if (ret)
krb5_err(context, 1, ret, "krb5_parse_name");
ret = krb5_get_credentials(context, 0, id, &in, creds);
if (ret)
krb5_err(context, 1, ret, "krb5_get_credentials");
return 0;
}
SEE ALSO¶
krb5(3),
krb5_get_forwarded_creds(3),
krb5.conf(5)