NAME

       gost12sum - generates or checks GOST R34.11-2012 message digests

SYNOPSIS

       gost12sum [-bvl] [-c [file]] | [file...]

DESCRIPTION

       gost12sum  generates or checks GOST hash sums. The algorithm to generate the is reasonably
       fast and strong enough for most cases. Exact specification of the  algorithm  is  in  GOST
       R34.11-2012.

       Normally  gost12sum generates checksums of all files given to it as a parameter and prints
       the checksums followed by the filenames. If, however, -c is specified, only  one  filename
       parameter  is  allowed.  This  file  should contain checksums and filenames to which these
       checksums refer to, and the files listed in that file are checked  against  the  checksums
       listed there. See option -c for more information.

   OPTIONS
       -b     Use  binary  mode. In unix environment, only difference between this and the normal
              mode is an asterisk preceding the filename in the output.

       -c     Check gost hashes of all files listed in file against the checksum  listed  in  the
              same  file.  The  actual format of that file is the same as output of md5sum.  That
              is, each line in the file describes a file. A line looks like:

              <hashsum> <filename>

              So, for example, if a file was created and its message digest calculated like so:

              echo foo > hash-test-file; gost12sum hash-test-file

              gost12sum would report:

              3d4a51ee7713e6467442facefe06f153a303e7bdefbe7f9bdf2edb4ae9c866ff hash-test-file

              When invoked with -c option gost12sum normally works silently unless  error  found.
              Use -v if you want to see list of successfully checked files

       -v     Be more verbose. Print filenames when checking (with -c).

       -l     Use long (512-bit) hash instead of short (256-bit).

BUGS

       This manpage is not quite accurate and has formatting inconsistent with other manpages.

       gost12sum does not accept standard options like --help.

AUTHOR

       gost12sum utility written by Cryptocom LTD

       This manual page is written by Victor Wagner <vitus@wagner.pp.ru> for Debian GNU/Linux