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/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/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)