/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/* #pragma ident        "@(#)g_dup_name.c       1.14    04/02/23 SMI" */

/*
 *  routine gss_duplicate_name
 *
 * This routine does not rely on mechanism implementation of this
 * name, but instead uses mechanism specific gss_import_name routine.
 */

#include <mglueP.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <string.h>
#include <errno.h>

static OM_uint32
val_dup_name_args(
        OM_uint32 *minor_status,
        const gss_name_t src_name,
        gss_name_t *dest_name)
{

        /* Initialize outputs. */

        if (minor_status != NULL)
                *minor_status = 0;

        if (dest_name != NULL)
                *dest_name = GSS_C_NO_NAME;

        /* Validate arguments. */

        if (minor_status == NULL)
                return (GSS_S_CALL_INACCESSIBLE_WRITE);

        /* if output_name is NULL, simply return */
        if (dest_name == NULL)
                return (GSS_S_CALL_INACCESSIBLE_WRITE);

        if (src_name == GSS_C_NO_NAME)
                return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME);

        return (GSS_S_COMPLETE);
}


OM_uint32 KRB5_CALLCONV
gss_duplicate_name(OM_uint32 *minor_status, const gss_name_t src_name,
                   gss_name_t *dest_name)
{
                gss_union_name_t src_union, dest_union;
                OM_uint32 major_status = GSS_S_FAILURE;

        major_status = val_dup_name_args(minor_status, src_name, dest_name);
        if (major_status != GSS_S_COMPLETE)
                return (major_status);

        src_union = (gss_union_name_t)src_name;

        /*
         * First create the union name struct that will hold the external
         * name and the name type.
         */
        dest_union = (gss_union_name_t)malloc(sizeof (gss_union_name_desc));
        if (!dest_union)
                goto allocation_failure;

        dest_union->loopback = 0;
        dest_union->mech_type = 0;
        dest_union->mech_name = 0;
        dest_union->name_type = 0;
        dest_union->external_name = 0;

        /* Now copy the external representation. */
        if (gssint_create_copy_buffer(src_union->external_name,
                                &dest_union->external_name, 0))
                goto allocation_failure;

        if (src_union->name_type != GSS_C_NULL_OID) {
                major_status = generic_gss_copy_oid(minor_status,
                                                src_union->name_type,
                                                &dest_union->name_type);
                if (major_status != GSS_S_COMPLETE) {
                    map_errcode(minor_status);
                    goto allocation_failure;
                }
        }

        /*
         * See if source name is mechanim specific, if so then need to import it
         */
        if (src_union->mech_type) {
                major_status = generic_gss_copy_oid(minor_status,
                                                        src_union->mech_type,
                                                        &dest_union->mech_type);
                if (major_status != GSS_S_COMPLETE) {
                    map_errcode(minor_status);
                    goto allocation_failure;
                }

                major_status = gssint_import_internal_name(minor_status,
                                                        src_union->mech_type,
                                                        src_union,
                                                        &dest_union->mech_name);
                if (major_status != GSS_S_COMPLETE)
                        goto allocation_failure;
        }


        dest_union->loopback = dest_union;
        *dest_name = (gss_name_t)dest_union;
        return (GSS_S_COMPLETE);

allocation_failure:
        if (dest_union) {
                if (dest_union->external_name) {
                        if (dest_union->external_name->value)
                                free(dest_union->external_name->value);
                        free(dest_union->external_name);
                }
                if (dest_union->name_type)
                        (void) generic_gss_release_oid(minor_status,
                                                        &dest_union->name_type);
                if (dest_union->mech_name)
                        (void) gssint_release_internal_name(minor_status,
                                                dest_union->mech_type,
                                                &dest_union->mech_name);
                if (dest_union->mech_type)
                        (void) generic_gss_release_oid(minor_status,
                                                        &dest_union->mech_type);
                free(dest_union);
        }
        return (major_status);
} /*    gss_duplicate_name      */