veriexecctl(8) - NetBSD Manual Pages

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VERIEXECCTL(8)          NetBSD System Manager's Manual          VERIEXECCTL(8)


NAME

     veriexecctl -- load or report veriexec fingerprints


SYNOPSIS

     veriexecctl load signatures


DESCRIPTION

     The veriexecctl command is used to manipulate the Veriexec feature.  Ver-
     iexec must have been configured into the booted kernel for this commaned
     to work.


COMMANDS

     load signatures            Load the fingerprint entries contained in
                                signatures into the in kernel tables.  This
                                operation is only available if kern.ver-
                                iexec.strict is zero.  Once loaded the kernel
                                can then validate executed programs or files
                                against the loaded fingerprints and report
                                when fingerprints do not match.


SIGNATURES

     The signatures file contains lines of fields (separated by one or more
     whitespace characters) of the form:

           path type fingerprint    options

     Where path is the full path to the file and type is the type of finger-
     print used, see above for the default list.  Other fingerprints may be
     available depending on kernel configuration.  The fingerprint field is a
     hexadecimal representation of the fingerprint for the file.  The field
     options contains the associated options for the file.  Currently there
     are seven valid options:

     DIRECT       Allow direct execution only.
     INDIRECT     If this option is set then the executable cannot be invoked
                  directly, it can only be used as an interpreter in shell
                  scripts.
     FILE         Indicates that the fingerprint is associated with a file,
                  not an executable.  Files have their fingerprints verified
                  during open(2) and are automatically made read only.  This
                  option may be used to verify shared libraries have not been
                  tampered with.
     PROGRAM      An alias for DIRECT, allow direct execution only.
     INTERPRETER  An alias for INDIRECT, the executable may only be used as an
                  interpreter for shell scripts.
     SCRIPT       The file is a shell script.  For correct operation of ver-
                  iexec, a script must have both FILE and DIRECT attributes
                  set.  This option is a shorthand way of setting the options
                  for correct operation of shell scripts.
     LIBRARY      The file is a library, this option is an alias of the FILE
                  option.

     There must be only one executable/fingerprint pair per line.  Comments
     are indicated by the first character of a line being a `#' character.
     Multiple options can be combined using a `,' character.  If no options
     are specified, both direct and indirect execution are implied.


FILES

     /dev/veriexec    veriexec device node
     /etc/signatures  default signatures file


SEE ALSO

     veriexec(4), /usr/share/examples/veriexecctl/gen_md5,
     /usr/share/examples/veriexecctl/gen_rmd160,
     /usr/share/examples/veriexecctl/gen_sha1


HISTORY

     veriexecctl first appeared in NetBSD 2.0.


NOTES

     veriexecctl requires the kernel to have been configured with the
     VERIFIED_EXEC option and the veriexec pseudo-device.


BUGS

     There must be no whitespace in the path field of a fingerprint entry.

NetBSD 3.0.2                    August 6, 2005                    NetBSD 3.0.2