/*-
 * Copyright (c) 2005 Doug Rabson
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      $FreeBSD: src/lib/libgssapi/gss_names.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
 */

#include "mech_locl.h"

OM_uint32
_gss_find_mn(OM_uint32 *minor_status, struct _gss_name *name, gss_OID mech,
             struct _gss_mechanism_name **output_mn)
{
        OM_uint32 major_status;
        gssapi_mech_interface m;
        struct _gss_mechanism_name *mn;

        *output_mn = NULL;

        HEIM_SLIST_FOREACH(mn, &name->gn_mn, gmn_link) {
                if (gss_oid_equal(mech, mn->gmn_mech_oid))
                        break;
        }

        if (!mn) {
                /*
                 * If this name is canonical (i.e. there is only an
                 * MN but it is from a different mech), give up now.
                 */
                if (!name->gn_value.value)
                        return GSS_S_BAD_NAME;

                m = __gss_get_mechanism(mech);
                if (!m)
                        return (GSS_S_BAD_MECH);

                mn = malloc(sizeof(struct _gss_mechanism_name));
                if (!mn)
                        return GSS_S_FAILURE;

                major_status = m->gm_import_name(minor_status,
                    &name->gn_value,
                    (name->gn_type.elements
                        ? &name->gn_type : GSS_C_NO_OID),
                    &mn->gmn_name);
                if (major_status != GSS_S_COMPLETE) {
                        _gss_mg_error(m, major_status, *minor_status);
                        free(mn);
                        return major_status;
                }

                mn->gmn_mech = m;
                mn->gmn_mech_oid = &m->gm_mech_oid;
                HEIM_SLIST_INSERT_HEAD(&name->gn_mn, mn, gmn_link);
        }
        *output_mn = mn;
        return 0;
}


/*
 * Make a name from an MN.
 */
struct _gss_name *
_gss_make_name(gssapi_mech_interface m, gss_name_t new_mn)
{
        struct _gss_name *name;
        struct _gss_mechanism_name *mn;

        name = malloc(sizeof(struct _gss_name));
        if (!name)
                return (0);
        memset(name, 0, sizeof(struct _gss_name));

        mn = malloc(sizeof(struct _gss_mechanism_name));
        if (!mn) {
                free(name);
                return (0);
        }

        HEIM_SLIST_INIT(&name->gn_mn);
        mn->gmn_mech = m;
        mn->gmn_mech_oid = &m->gm_mech_oid;
        mn->gmn_name = new_mn;
        HEIM_SLIST_INSERT_HEAD(&name->gn_mn, mn, gmn_link);

        return (name);
}