krb5_get_credentials, krb5_get_credentials_with_flags, krb5_get_kdc_cred, krb5_get_renewed_creds — get

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.

       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;
       }

       Kerberos 5 Library (libkrb5, -lkrb5)

       krb5_get_credentials,  krb5_get_credentials_with_flags,  krb5_get_kdc_cred,  krb5_get_renewed_creds — get
       credentials from the KDC using krbtgt

krb5(3), krb5_get_forwarded_creds(3), krb5.conf(5)

HEIMDAL                                           July 26, 2004                          KRB5_GET_CREDENTIALS(3)

#include<krb5.h>krb5_error_codekrb5_get_credentials(krb5_contextcontext, krb5_flagsoptions, krb5_ccacheccache,  krb5_creds*in_creds,
           krb5_creds**out_creds);

       krb5_error_codekrb5_get_credentials_with_flags(krb5_contextcontext,      krb5_flagsoptions,      krb5_kdc_flagsflags,
           krb5_ccacheccache, krb5_creds*in_creds, krb5_creds**out_creds);

       krb5_error_codekrb5_get_kdc_cred(krb5_contextcontext, krb5_ccacheid, krb5_kdc_flagsflags,  krb5_addresses*addresses,
           Ticket*second_ticket, krb5_creds*in_creds, krb5_creds**out_creds);

       krb5_error_codekrb5_get_renewed_creds(krb5_contextcontext,        krb5_creds*creds,       krb5_const_principalclient,
           krb5_ccacheccache, constchar*in_tkt_service);