plucky (3) Math::Prime::Util::ChaCha.3pm.gz

Provided by: libmath-prime-util-perl_0.73-2build6_amd64 bug

NAME
       Math::Prime::Util::ChaCha - Pure Perl ChaCha20 CSPRNG


VERSION
       Version 0.73


SYNOPSIS
DESCRIPTION
       A pure Perl implementation of ChaCha20 with a CSPRNG interface.


FUNCTIONS
   csrand
       Takes a binary string as input and seeds the internal CSPRNG.

   srand
       A method for sieving the CSPRNG with a small value.  This will not be secure but can be useful for
       simulations and emulating the system "srand".

       With no argument, chooses a random number, seeds and returns the number.  With a single integer argument,
       seeds and returns the number.

   irand
       Returns a random 32-bit integer.

   irand64
       Returns a random 64-bit integer.

   random_bytes
       Takes an unsigned number "n" as input and returns that many random bytes as a single binary string.


AUTHORS
       Dana Jacobsen <dana@acm.org>


ACKNOWLEDGEMENTS
       Daniel J. Bernstein wrote the ChaCha family of stream ciphers in 2008 as an update to the popular Salsa20
       cipher from 2005.

       RFC7539: "ChaCha20 and Poly1305 for IETF Protocols" was used to create both the C and Perl
       implementations.  Test vectors from that document are used here as well.

       For final optimizations I got ideas from Christopher Madsen's Crypt::Salsa20 for how to best work around
       some of Perl's aggressive dynamic typing.  Our core is still about 20% slower than Salsa20.


       Copyright 2017 by Dana Jacobsen <dana@acm.org>

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself.