Since the KTLS now supports TLS1.3, the daemons default to version 1.3, since the draft (to be an RFC someday) requires TLS1.3. However, since FreeBSD 13,0, 13,1 uses TLS1.2 for NFS-over-TLS, the "-2" option is added to both daemons for compatibility with FreeBSD 13.0, 13.1. This patch updates the man pages for this. This is a content change. Reviewed by: pauamma_gundo.com MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D35290
221 lines
6.6 KiB
Groff
221 lines
6.6 KiB
Groff
.\" Copyright (c) 2008 Isilon Inc http://www.isilon.com/
|
|
.\" Authors: Doug Rabson <dfr@rabson.org>
|
|
.\" Developed with Red Inc: Alfred Perlstein <alfred@FreeBSD.org>
|
|
.\"
|
|
.\" 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.\" Modified from gssd.8 for rpc.tlsclntd.8 by Rick Macklem.
|
|
.Dd May 22, 2022
|
|
.Dt RPC.TLSCLNTD 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm rpc.tlsclntd
|
|
.Nd "Sun RPC over TLS Client Daemon"
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl 2
|
|
.Op Fl C Ar available_ciphers
|
|
.Op Fl D Ar certdir
|
|
.Op Fl d
|
|
.Op Fl l Ar CAfile
|
|
.Op Fl m
|
|
.Op Fl p Ar CApath
|
|
.Op Fl r Ar CRLfile
|
|
.Op Fl v
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
program provides support for the client side of the kernel Sun RPC over TLS
|
|
implementation.
|
|
This daemon must be running for the kernel RPC to be able to do a TLS
|
|
connection to a server for an NFS over TLS mount.
|
|
This daemon requires that the kernel be built with
|
|
.Dq options KERNEL_TLS
|
|
and be running on an architecture such as
|
|
.Dq amd64
|
|
that supports a direct map (not i386) with
|
|
.Xr ktls 4
|
|
enabled.
|
|
.Pp
|
|
If either of the
|
|
.Fl l
|
|
or
|
|
.Fl p
|
|
options have been specified, the daemon will require the server's
|
|
certificate to verify
|
|
and have a Fully Qualified Domain Name (FQDN) in it.
|
|
This FQDN must match
|
|
the reverse DNS name for the IP address that
|
|
the server is using for the TCP connection.
|
|
The FQDN may be
|
|
in either the DNS field of the subjectAltName or the CN field of the
|
|
subjectName in the certificate and
|
|
cannot have a wildcard
|
|
.Dq *
|
|
in it.
|
|
.Pp
|
|
If a SIGHUP signal is sent to the daemon it will reload the
|
|
.Dq CRLfile
|
|
and will shut down any extant connections that presented certificates
|
|
during TLS handshake that have been revoked.
|
|
If the
|
|
.Fl r
|
|
option was not specified, the SIGHUP signal will be ignored.
|
|
.Pp
|
|
The daemon will log failed certificate verifications via
|
|
.Xr syslogd 8
|
|
using LOG_INFO | LOG_DAEMON when the
|
|
.Fl l
|
|
or
|
|
.Fl p
|
|
option has been specified.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width indent
|
|
.It Fl 2 , Fl Fl usetls1_2
|
|
Specify the use of TLS version 1.2.
|
|
By default, the client will
|
|
use TLS version 1.3, as required by the RFC.
|
|
However, early
|
|
.Fx
|
|
.Pq 13.0 and 13.1
|
|
servers require
|
|
this option, since they only support TLS version 1.2.
|
|
.It Fl C Ar available_ciphers , Fl Fl ciphers= Ns Ar available_ciphers
|
|
Specify which ciphers are available during TLS handshake.
|
|
If this option is specified,
|
|
.Dq SSL_CTX_set_ciphersuites()
|
|
will be called with
|
|
.Dq available_ciphers
|
|
as the argument.
|
|
If this option is not specified, the cipher will be chosen by
|
|
.Xr ssl 7 ,
|
|
which should be adequate for most cases.
|
|
The format for the available ciphers is a simple
|
|
.So
|
|
:
|
|
.Sc
|
|
separated list, in order of preference.
|
|
The command
|
|
.Dq openssl ciphers -s -tls1_3
|
|
lists available ciphers.
|
|
.It Fl D Ar certdir , Fl Fl certdir= Ns Ar certdir
|
|
Use
|
|
.Dq certdir
|
|
instead of /etc/rpc.tlsclntd for the
|
|
.Fl m
|
|
option.
|
|
.It Fl d , Fl Fl debuglevel
|
|
Run in debug mode.
|
|
In this mode,
|
|
.Nm
|
|
will not fork when it starts.
|
|
.It Fl l Ar CAfile , Fl Fl verifylocs= Ns Ar CAfile
|
|
This specifies the path name of a CAfile which holds the information
|
|
for server certificate verification.
|
|
This path name is used in
|
|
.Dq SSL_CTX_load_verify_locations(ctx,CAfile,NULL)
|
|
and
|
|
.Dq SSL_CTX_set0_CA_list(ctx,SSL_load_client_CA_file(CAfile))
|
|
openssl library calls.
|
|
Note that this is a path name for the file and is not assumed to be
|
|
in
|
|
.Dq certdir .
|
|
.It Fl m , Fl Fl mutualverf
|
|
Enable support for mutual authentication.
|
|
A certificate and associated key must be found in /etc/rpc.tlsclntd
|
|
(or the directory specified by the
|
|
.Fl D
|
|
option)
|
|
in case a server requests a peer certificate.
|
|
The first certificate needs to be in a file named
|
|
.Dq cert.pem
|
|
and the associated key in a file named
|
|
.Dq certkey.pem .
|
|
The
|
|
.Xr mount_nfs 8
|
|
option
|
|
.Fl tlscertname
|
|
can be used to override the default certificate for a given
|
|
NFS mount, where the files use the alternate naming specified by the option.
|
|
If there is a passphrase on the
|
|
.Dq certkey.pem
|
|
file, this daemon will prompt for the passphrase during startup.
|
|
The keys for alternate certificates cannot have passphrases.
|
|
.It Fl p Ar CApath , Fl Fl verifydir= Ns Ar CApath
|
|
This option is similar to the
|
|
.Fl l
|
|
option, but specifies the path of a directory with CA
|
|
certificates in it.
|
|
When this option is used,
|
|
.Dq SSL_CTX_set0_CA_list(ctx,SSL_load_client_CA_file())
|
|
is not called, so a list of CA names is not be passed
|
|
to the server during the TLS handshake.
|
|
The openssl documentation indicates this call is rarely needed.
|
|
.It Fl r Ar CRLfile , Fl Fl crl= Ns Ar CRLfile
|
|
This option specifies a Certificate Revocation List (CRL) file
|
|
that is to be loaded into the verify certificate store and
|
|
checked during verification of the server's certificate.
|
|
This option is meaningless unless either the
|
|
.Fl l
|
|
or
|
|
.Fl p
|
|
have been specified.
|
|
.It Fl v , Fl Fl verbose
|
|
Run in verbose mode.
|
|
In this mode,
|
|
.Nm
|
|
will log activity messages to syslog using LOG_INFO | LOG_DAEMON or to
|
|
stderr, if the
|
|
.Fl d
|
|
option has also been specified.
|
|
.El
|
|
.Sh EXIT STATUS
|
|
.Ex -std
|
|
.Sh SEE ALSO
|
|
.Xr openssl 1 ,
|
|
.Xr ktls 4 ,
|
|
.Xr mount_nfs 8 ,
|
|
.Xr rpc.tlsservd 8 ,
|
|
.Xr ssl 7 ,
|
|
.Xr syslogd 8
|
|
.Sh STANDARDS
|
|
The implementation is based on the specification in
|
|
.Rs
|
|
.%B "RFC NNNN"
|
|
.%T "Towards Remote Procedure Call Encryption By Default"
|
|
.Re
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
manual page first appeared in
|
|
.Fx 13.0 .
|
|
.Sh BUGS
|
|
This daemon cannot be safely shut down and restarted if there are
|
|
any active RPC-over-TLS connections.
|
|
Doing so will orphan the KERNEL_TLS connections, so that they
|
|
can no longer do upcalls successfully, since the
|
|
.Dq SSL *
|
|
structures in userspace have been lost.
|