/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */

/* tests/gssapi/t_ccselect.c - Test program for GSSAPI cred selection */

/*

 * Copyright 2011 by the Massachusetts Institute of Technology.

 * All Rights Reserved.

 *

 * Export of this software from the United States of America may

 *   require a specific license from the United States Government.

 *   It is the responsibility of any person or organization contemplating

 *   export to obtain such a license before exporting.

 *

 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and

 * distribute this software and its documentation for any purpose and

 * without fee is hereby granted, provided that the above copyright

 * notice appear in all copies and that both that copyright notice and

 * this permission notice appear in supporting documentation, and that

 * the name of M.I.T. not be used in advertising or publicity pertaining

 * to distribution of the software without specific, written prior

 * permission.  Furthermore if you modify this software you must label

 * your software as modified software and not distribute it in such a

 * fashion that it might be confused with the original M.I.T. software.

 * M.I.T. makes no representations about the suitability of

 * this software for any purpose.  It is provided "as is" without express

 * or implied warranty.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "common.h"

/*

 * Test program for client credential selection, intended to be run from a

 * Python test script.  Establishes contexts with an optionally specified

 * initiator name, a specified target name, and the default acceptor cred.  If

 * the exchange is successful, prints the initiator name as seen by the

 * acceptor.  If any call is unsuccessful, displays an error message.  Exits

 * with status 0 if all operations are successful, or 1 if not.

 *

 * Usage: ./t_ccselect targetname [initiatorname|-]

 */

int

main(int argc, char *argv[])

{

    OM_uint32 minor, major, flags;

    gss_cred_id_t initiator_cred = GSS_C_NO_CREDENTIAL;

    gss_name_t target_name, initiator_name = GSS_C_NO_NAME;

    gss_name_t real_initiator_name;

    gss_buffer_desc namebuf;

    gss_ctx_id_t initiator_context, acceptor_context;

    if (argc < 2 || argc > 3) {

        fprintf(stderr, "Usage: %s targetname [initiatorname|-]\n", argv[0]);

        return 1;

    }

    target_name = import_name(argv[1]);

    if (argc >= 3) {

        /* Get initiator cred. */

        if (strcmp(argv[2], "-") != 0)

            initiator_name = import_name(argv[2]);

        major = gss_acquire_cred(&minor, initiator_name, GSS_C_INDEFINITE,

                                 GSS_C_NO_OID_SET, GSS_C_INITIATE,

                                 &initiator_cred, NULL, NULL);

        check_gsserr("gss_acquire_cred", major, minor);

    }

    flags = GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG;

    establish_contexts(&mech_krb5, initiator_cred, GSS_C_NO_CREDENTIAL,

                       target_name, flags, &initiator_context,

                       &acceptor_context, &real_initiator_name, NULL, NULL);

    namebuf.value = NULL;

    namebuf.length = 0;

    major = gss_display_name(&minor, real_initiator_name, &namebuf, NULL);

    check_gsserr("gss_display_name(initiator)", major, minor);

    printf("%.*s\n", (int)namebuf.length, (char *)namebuf.value);

    (void)gss_release_name(&minor, &target_name);

    (void)gss_release_name(&minor, &initiator_name);

    (void)gss_release_name(&minor, &real_initiator_name);

    (void)gss_release_cred(&minor, &initiator_cred);

    (void)gss_delete_sec_context(&minor, &initiator_context, NULL);

    (void)gss_delete_sec_context(&minor, &acceptor_context, NULL);

    (void)gss_release_buffer(&minor, &namebuf);

    return 0;

}