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

.B gost12sum

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

.B 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

.I GOST R34.11-2012.

Normally

.B gost12sum

generates checksums of all files given to it as a parameter and prints

the checksums followed by the filenames. If, however,

.B \-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

.B \-c

for more information.

.TP

Use binary mode. In unix environment, only difference between this and

the normal mode is an asterisk preceding the filename in the output.

.TP

Check gost hashes of all files listed in

.I file

against the checksum listed in the same file. The actual format of that

file is the same as output of

.B md5sum.

That is, each line in the file describes a file. A line looks like:

.B <hashsum> <filename>

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

like so:

.B echo foo > hash\-test\-file; gost12sum hash\-test\-file

.B gost12sum

would report:

3d4a51ee7713e6467442facefe06f153a303e7bdefbe7f9bdf2edb4ae9c866ff hash\-test\-file

When invoked with \-c option

.B gost12sum

normally works silently unless error found. Use \-v if you want to see

list of successfully checked files

.TP

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

.TP

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

This manpage is not quite accurate and has formatting inconsistent

with other manpages.

.B gost12sum

does not accept standard options like

.BR \-\-help .

.B gost12sum

utility written by Cryptocom LTD

This manual page is written by Victor Wagner <[email protected]> for

Debian GNU/Linux