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

Openssl                                            02 Aug 2016                                      GOST12SUM(1)