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+.\" -*- nroff -*-
+.\"
+.\" 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.
+.\"
+.\"	$FreeBSD$
+.\"
+.\" Copyright (C) The Internet Society (2000).  All Rights Reserved.
+.\"
+.\" This document and translations of it may be copied and furnished to
+.\" others, and derivative works that comment on or otherwise explain it
+.\" or assist in its implementation may be prepared, copied, published
+.\" and distributed, in whole or in part, without restriction of any
+.\" kind, provided that the above copyright notice and this paragraph are
+.\" included on all such copies and derivative works.  However, this
+.\" document itself may not be modified in any way, such as by removing
+.\" the copyright notice or references to the Internet Society or other
+.\" Internet organizations, except as needed for the purpose of
+.\" developing Internet standards in which case the procedures for
+.\" copyrights defined in the Internet Standards process must be
+.\" followed, or as required to translate it into languages other than
+.\" English.
+.\"
+.\" The limited permissions granted above are perpetual and will not be
+.\" revoked by the Internet Society or its successors or assigns.
+.\"
+.\" This document and the information contained herein is provided on an
+.\" "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
+.\" TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
+.\" BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
+.\" HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+.\"
+.\" The following commands are required for all man pages.
+.Dd November 12, 2005
+.Os
+.Dt GSS_WRAP_SIZE_LIMIT 3 PRM
+.Sh NAME
+.Nm gss_wrap_size_limit
+.Nd Determine maximum message sizes
+.\" This next command is for sections 2 and 3 only.
+.\" .Sh LIBRARY
+.Sh SYNOPSIS
+.In "gssapi/gssapi.h"
+.Ft OM_uint32
+.Fo gss_wrap_size_limit
+.Fa "OM_uint32 *minor_status"
+.Fa "const gss_ctx_id_t context_handle"
+.Fa "int conf_req_flag"
+.Fa "gss_qop_t qop_req"
+.Fa "OM_uint32 req_output_size"
+.Fa "OM_uint32 *max_input_size"
+.Fc
+.Sh DESCRIPTION
+Allows an application to determine the maximum message size that,
+if presented to
+.Xr gss_wrap 3
+with the same
+.Dv conf_req_flag
+and
+.Dv qop_req
+parameters,
+will result in an output token containing no more than
+.Dv req_output_size
+bytes.
+.Pp
+This call is intended for use by applications that
+communicate over protocols that impose a maximum message size.
+It enables the application to fragment messages prior to applying protection.
+.Pp
+GSS-API implementations are recommended but not required to detect
+invalid QOP values when
+.Fn gss_wrap_size_limit
+is called.
+This routine guarantees only a maximum message size,
+not the availability of specific QOP values for message protection.
+.Pp
+Successful completion of this call does not guarantee that
+.Xr gss_wrap 3
+will be able to protect a message of length max_input_size bytes,
+since this ability may depend on the availability of system resources
+at the time that
+.Xr gss_wrap 3
+is called.
+However, if the implementation itself imposes an upper limit on
+the length of messages that may be processed by gss_wrap,
+the implementation should not return a value via
+.Dv max_input_bytes
+that is greater than this length.
+.Sh PARAMETERS
+.Bl -tag
+.It minor_status
+Mechanism specific status code.
+.It context_handle
+A handle that refers to the security over which the messages will be sent.
+.It conf_req_flag
+Indicates whether
+.Xr gss_wrap 3
+will be asked to apply confidentiality protection
+in addition to integrity protection.
+.It qop_req
+Indicates the level of protection that
+.Xr gss_wrap 3
+will be asked to provide.
+.It req_output_size
+The desired maximum size for tokens emitted by
+.Xr gss_wrap 3 .
+.It max_input_size
+The maximum input message size that may be presented to
+.Xr gss_wrap 3
+in order to guarantee that the emitted token shall
+be no larger than
+.Dv req_output_size
+bytes.
+.El
+.Sh RETURN VALUES
+.Bl -tag
+.It GSS_S_COMPLETE
+Successful completion.
+.It GSS_S_NO_CONTEXT
+The referenced context could not be accessed.
+.It GSS_S_CONTEXT_EXPIRED
+The context has expired.
+.It GSS_S_BAD_QOP
+The specified QOP is not supported by the mechanism.
+.El
+.Sh SEE ALSO
+.Xr gss_wrap 3
+.Sh STANDARDS
+.Bl -tag
+.It RFC 2743
+Generic Security Service Application Program Interface Version 2, Update 1
+.It RFC 2744
+Generic Security Service API Version 2 : C-bindings
+.\" .Sh HISTORY
+.Sh HISTORY
+The
+.Nm
+manual page example first appeared in
+.Fx 7.0 .
+.Sh AUTHORS
+John Wray, Iris Associates