xref: /freebsd/sbin/veriexec/veriexec.8 (revision c697fb7f)
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25.\" $FreeBSD$
26.\"
27.Dd July 4, 2018
28.Dt VERIEXEC 8
29.Os
30.Sh NAME
31.Nm veriexec
32.Nd manipulate state of mac_veriexec
33.Sh SYNOPSIS
34.Nm
35.Op Fl v
36.Op Fl C Ar directory
37.Pa manifest
38.Nm
39.Fl z Ar state
40.Nm
41.Fl i Ar state
42.Nm
43.Fl x
44.Ar file ...
45.Sh DESCRIPTION
46.Nm
47is a utility to query or manipulate the state of
48.Xr mac_veriexec 4 .
49.Pp
50The first form is for loading a
51.Pa manifest .
52.Nm
53first verifies a digital signature of the
54.Ar manifest
55and if successful, parses it and feeds its content to kernel.
56.Pp
57The second form with
58.Fl z
59is used to modify the
60.Ar state ,
61and with
62.Fl i
63to query the current
64.Ar state .
65.Pp
66The final form with
67.Fl x
68is used to test whether
69.Ar file
70is verified or not.
71This requires
72.Xr mac_veriexec 4
73to be in the
74.Ql active
75or
76.Ql enforce
77state.
78.Pp
79The possible states
80are:
81.Bl -tag -width enforce
82.It Ar loaded
83set automatically when first
84.Pa manifest
85has been loaded.
86.It Ar active
87.Xr mac_veriexec 4
88will begin checking files.
89This state can only be entered from the
90.Ar loaded
91state.
92.It Ar enforce
93.Xr mac_veriexec 4
94will fail attempts to
95.Xr exec 2
96or
97.Xr open 2
98files with
99.Dv O_VERIFY
100unless verified.
101.It Ar locked
102prevent loading of any more manifests.
103.El
104.Sh MANIFESTS
105The manifest contains a mapping of relative pathnames to fingerprints
106with optional flags.
107For example:
108.Bd -literal -offset indent
109sbin/veriexec sha256=f22136...c0ff71 no_ptrace
110usr/bin/python sha256=5944d9...876525 indirect
111sbin/somedaemon sha256=77fc2f...63f5687 label=mod1/val1,mod2/val2
112.Ed
113The supported flags are:
114.Bl -tag -width indirect
115.It Ql indirect
116the executable cannot be run directly,
117but can be used as an interpreter for example via:
118.Bd -literal -offset indent
119#!/usr/bin/python
120.Ed
121.It Ql no_ptrace
122do not allow running executable under a debugger.
123Useful for any application critical to the security state of system.
124.El
125.Pp
126The
127.Ql label
128argument allows associating a
129.Xr maclabel 7
130with the executable.
131Neither
132.Nm
133nor
134.Xr mac_veriexec 4
135(if it supports labels)
136pay any attention to the content of the label
137they are provided for the use of other
138.Xr mac 4
139modules.
140.Sh HISTORY
141The Verified Exec system first appeared in NetBSD.
142This utility derrives from the one found in Junos.
143The key difference is the requirement that manifest files
144be digitally signed.
145
146
147