/*
 * 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	*/
