.Dd January 3, 2018
.Dt RDD 1
.Os
.Sh NAME
.Nm rdd
.Nd random data dump
.Sh SYNOPSIS
.Nm
.Op Fl i Ar source
.Op Fl r Ar rekeymb
.Op Fl v
.Sh DESCRIPTION
.Nm
is a high-speed, cryptographically safe random data generator
using the reference implementation of the eSTREAM Profile 1 SOSEMANUK
stream cipher.
It is designed to fill crypto devices with random data.
.Pp
Random binary data is outputted to standard output.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl i Ar source
Read key and IVs from
.Ar source
(default:
.Pa /dev/urandom )
.It Fl r Ar rekeymb
Reload the IV every
.Ar rekeymb
megabytes of output (default: 4).
.It Fl v
Print a
.Sq Li \&.
to standard error on every rekey.
.El
.Sh EXIT STATUS
.Ex -std
.Sh SEE ALSO
.Xr dd 1 ,
.Xr random 4 ,
.Xr random 7
.Sh NOTES
rdd reads 32 random bytes for the initial key and 16 bytes for every rekeying
from the random source.
Setting
.Ar rekeymb
to -1 never rekeys.
.Pp
This implementation passed dieharder 3.31.1 "-a" and
PractRand/RNG_test 0.90 (tested up to 512 GB).
.Sh AUTHORS
.An Leah Neukirchen Aq Mt leah@vuxu.org
.Sh LICENSE
.Nm
is in the public domain.
.Pp
To the extent possible under law,
the creator of this work
has waived all copyright and related or
neighboring rights to this work.
.Pp
.Lk http://creativecommons.org/publicdomain/zero/1.0/
.Pp
This program includes code taken from
.Lk http://www.ecrypt.eu.org/stream/p3ciphers/sosemanuk/sosemanuk_p3source.zip
as of 2013-04-13.
An error message which can never occur in rdd usage
has been #ifdef'ed out.
.Pp
\[co] 2005 X-CRYPT project.
This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising
from the use of this software.
.Pp
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to no restriction.