freebsd-nq/lib/libgssapi/gss_wrap_size_limit.c

/*-
 * 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.
 *
 *	$FreeBSD$
 */

#include <gssapi/gssapi.h>

#include "mech_switch.h"
#include "context.h"

OM_uint32
gss_wrap_size_limit(OM_uint32 *minor_status,
    const gss_ctx_id_t context_handle,
    int conf_req_flag,
    gss_qop_t qop_req,
    OM_uint32 req_output_size,
    OM_uint32 *max_input_size)
{
	struct _gss_context *ctx = (struct _gss_context *) context_handle;
	struct _gss_mech_switch *m = ctx->gc_mech;

	*max_input_size = 0;
	if (ctx == NULL) {
		*minor_status = 0;
		return (GSS_S_NO_CONTEXT);
	}

	return (m->gm_wrap_size_limit(minor_status, ctx->gc_ctx,
		    conf_req_flag, qop_req, req_output_size, max_input_size));
}