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>