bionic (1) gostsum.1.gz

NAME

       gostsum - generates or checks GOST R34.11-94 message digests

SYNOPSIS

       gostsum [-bvt] [-c [file]] | [file...]

DESCRIPTION

       gostsum  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 R34.11-94.

       Normally gostsum 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; gostsum hash-test-file

              gostsum would report:

              1541e09d0aa5971f732991ae1bdfb63f2609edd7536b40f8c2ae7c1e2f99e072 hash-test-file

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

       -t     Use test parameter set.  gostsum supports two sets of parameters (which are really  parameters  of
              GOST  28147-89  block  cipher)  specified in the IETF draft draft-popov-cryptopro-cpalgs-02.txt By
              default, cryptopro paramset is used. This option enables use of  test  paramset  as  specified  in
              appendices to the GOST.

CAVEATS

       The  output  of gost12sum has a reversed byte order compared to output of openssl dgst command because of
       the Russian GOST requrements.

BUGS

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

       gostsum does not accept standard options like --help.

AUTHOR

            Victor Wagner <vitus@wagner.pp.ru>