153 lines
4.7 KiB
Groff
153 lines
4.7 KiB
Groff
.\" $NetBSD: veriexecctl.8,v 1.17 2005/08/07 11:17:31 wiz Exp $
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.\"
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.\" Copyright (c) 1999
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.\" Brett Lymn - blymn@baea.com.au, brett_lymn@yahoo.com.au
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.\"
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.\" This code is donated to The NetBSD Foundation by the author.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the Author may not be used to endorse or promote
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.\" products derived from this software without specific prior written
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.\" permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: veriexecctl.8,v 1.17 2005/08/07 11:17:31 wiz Exp $
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.\"
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.Dd August 6, 2005
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.Dt VERIEXECCTL 8
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.Os
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.Sh NAME
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.Nm veriexecctl
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.Nd load or report veriexec fingerprints
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.Sh SYNOPSIS
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.Nm
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.Cm load Ar signatures
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.Sh DESCRIPTION
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The
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.Nm
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command is used to manipulate the Veriexec feature.
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Veriexec must have been configured into the booted kernel for this
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commaned to work.
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.Sh COMMANDS
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.Bl -tag -width 25n
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.It Cm load Ar signatures
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Load the fingerprint entries contained in
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.Ar signatures
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into the in kernel tables.
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This operation is only available if kern.veriexec.strict is zero.
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Once loaded the kernel can then validate executed programs
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or files against the loaded fingerprints and report when fingerprints
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do not match.
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.El
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.Sh SIGNATURES
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The
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.Pa signatures
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file contains lines of fields (separated by one or more whitespace
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characters) of the form:
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.Pp
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.Dl path type fingerprint options
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.Pp
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Where
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.Em path
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is the full path to the file and
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.Em type
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is the type of fingerprint used, see above for the default list.
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Other fingerprints may be available depending on kernel configuration.
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The
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.Em fingerprint
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field is a hexadecimal representation of the fingerprint for
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the file.
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The field
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.Em options
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contains the associated options for the file.
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Currently there are seven valid options:
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.Pp
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.Bl -tag -width INTERPRETER -compact
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.It Dv DIRECT
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Allow direct execution only.
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.It Dv INDIRECT
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If this option is set then the executable cannot be invoked directly, it
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can only be used as an interpreter in shell scripts.
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.It Dv FILE
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Indicates that the fingerprint is associated with a file, not an
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executable.
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Files have their fingerprints verified during
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.Xr open 2
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and are automatically made read only.
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This option may be used to verify shared libraries have not been
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tampered with.
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.It Dv PROGRAM
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An alias for
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.Dv DIRECT ,
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allow direct execution only.
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.It Dv INTERPRETER
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An alias for
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.Dv INDIRECT ,
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the executable may only be used as an interpreter
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for shell scripts.
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.It Dv SCRIPT
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The file is a shell script.
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For correct operation of veriexec, a script must have both
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.Dv FILE
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and
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.Dv DIRECT
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attributes set.
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This option is a shorthand way of setting the options for correct
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operation of shell scripts.
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.It Dv LIBRARY
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The file is a library, this option is an alias of the
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.Dv FILE
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option.
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.El
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.Pp
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There must be only one executable/fingerprint pair per line.
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Comments are indicated by the first character of a line being a
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.Sq \&#
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character.
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Multiple options can be combined using a
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.Sq \&,
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character.
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If no options are specified, both direct and indirect execution
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are implied.
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.Sh FILES
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.Bl -tag -width /etc/signatures -compact
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.It Pa /dev/veriexec
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veriexec device node
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.It Pa /etc/signatures
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default signatures file
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.El
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.Sh SEE ALSO
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.Xr veriexec 4 ,
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.Pa /usr/share/examples/veriexecctl/gen_md5 ,
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.Pa /usr/share/examples/veriexecctl/gen_rmd160 ,
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.Pa /usr/share/examples/veriexecctl/gen_sha1
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.Sh HISTORY
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.Nm
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first appeared in
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.Nx 2.0 .
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.Sh NOTES
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.Nm
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requires the kernel to have been configured with the
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.Dv VERIFIED_EXEC
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option and the veriexec pseudo-device.
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.Sh BUGS
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There must be no whitespace in the path field of a fingerprint entry.
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