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

/*

 * Copyright 2009  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"

static void

dump_known_mech_attrs(gss_OID mech)

{

    OM_uint32 major, minor;

    gss_OID_set mech_attrs = GSS_C_NO_OID_SET;

    gss_OID_set known_attrs = GSS_C_NO_OID_SET;

    size_t i;

    major = gss_inquire_attrs_for_mech(&minor, mech, &mech_attrs,

                                       &known_attrs);

    check_gsserr("gss_inquire_attrs_for_mech", major, minor);

    printf("Known attributes\n");

    printf("----------------\n");

    for (i = 0; i < known_attrs->count; i++) {

        gss_buffer_desc name = GSS_C_EMPTY_BUFFER;

        gss_buffer_desc short_desc = GSS_C_EMPTY_BUFFER;

        gss_buffer_desc long_desc = GSS_C_EMPTY_BUFFER;

        major = gss_display_mech_attr(&minor, &known_attrs->elements[i],

                                      &name, &short_desc, &long_desc);

        check_gsserr("gss_display_mech_attr", major, minor);

        printf("%.*s (%.*s): %.*s\n", (int)short_desc.length,

               (char *)short_desc.value, (int)name.length, (char *)name.value,

               (int)long_desc.length, (char *)long_desc.value);

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

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

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

    }

    printf("\n");

    (void)gss_release_oid_set(&minor, &mech_attrs);

    (void)gss_release_oid_set(&minor, &known_attrs);

}

static void

dump_mech_attrs(gss_OID mech)

{

    OM_uint32 major, minor;

    gss_OID_set mech_attrs = GSS_C_NO_OID_SET;

    gss_OID_set known_attrs = GSS_C_NO_OID_SET;

    size_t i;

    major = gss_inquire_attrs_for_mech(&minor, mech, &mech_attrs,

                                       &known_attrs);

    check_gsserr("gss_inquire_attrs_for_mech", major, minor);

    printf("Mech attrs:  ");

    for (i = 0; i < mech_attrs->count; i++) {

        gss_buffer_desc name = GSS_C_EMPTY_BUFFER;

        gss_buffer_desc short_desc = GSS_C_EMPTY_BUFFER;

        gss_buffer_desc long_desc = GSS_C_EMPTY_BUFFER;

        major = gss_display_mech_attr(&minor, &mech_attrs->elements[i],

                                      &name, &short_desc, &long_desc);

        check_gsserr("gss_display_mech_attr", major, minor);

        printf("%.*s ", (int)name.length, (char *)name.value);

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

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

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

    }

    printf("\n");

    (void)gss_release_oid_set(&minor, &mech_attrs);

    (void)gss_release_oid_set(&minor, &known_attrs);

}

int

main(int argc, char *argv[])

{

    gss_OID_set mechs;

    OM_uint32 major, minor;

    size_t i;

    major = gss_indicate_mechs(&minor, &mechs);

    check_gsserr("gss_indicate_mechs", major, minor);

    if (mechs->count > 0)

        dump_known_mech_attrs(mechs->elements);

    for (i = 0; i < mechs->count; i++) {

        gss_buffer_desc oidstr = GSS_C_EMPTY_BUFFER;

        gss_buffer_desc sasl_mech_name = GSS_C_EMPTY_BUFFER;

        gss_buffer_desc mech_name = GSS_C_EMPTY_BUFFER;

        gss_buffer_desc mech_description = GSS_C_EMPTY_BUFFER;

        gss_OID oid = GSS_C_NO_OID;

        major = gss_oid_to_str(&minor, &mechs->elements[i], &oidstr);

        if (GSS_ERROR(major))

            continue;

        major = gss_inquire_saslname_for_mech(&minor, &mechs->elements[i],

                                              &sasl_mech_name, &mech_name,

                                              &mech_description);

        if (GSS_ERROR(major)) {

            gss_release_buffer(&minor, &oidstr);

            continue;

        }

        printf("-------------------------------------------------------------"

               "-----------------\n");

        printf("OID        : %.*s\n", (int)oidstr.length,

               (char *)oidstr.value);

        printf("SASL mech  : %.*s\n", (int)sasl_mech_name.length,

               (char *)sasl_mech_name.value);

        printf("Mech name  : %.*s\n", (int)mech_name.length,

               (char *)mech_name.value);

        printf("Mech desc  : %.*s\n", (int)mech_description.length,

               (char *)mech_description.value);

        dump_mech_attrs(&mechs->elements[i]);

        printf("-------------------------------------------------------------"

               "-----------------\n");

        major = gss_inquire_mech_for_saslname(&minor, &sasl_mech_name, &oid;;

        check_gsserr("gss_inquire_mech_for_saslname", major, minor);

        if (oid == GSS_C_NO_OID ||

            (oid->length != mechs->elements[i].length &&

             memcmp(oid->elements, mechs->elements[i].elements,

                    oid->length) != 0)) {

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

            (void)gss_oid_to_str(&minor, oid, &oidstr);

            fprintf(stderr, "Got different OID %.*s for mechanism %.*s\n",

                    (int)oidstr.length, (char *)oidstr.value,

                    (int)sasl_mech_name.length, (char *)sasl_mech_name.value);

        }

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

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

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

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

    }

    (void)gss_release_oid_set(&minor, &mechs);

    return 0;

}