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Math::Prime::Util::ChaUser3Contributed Perl DocumeMath::Prime::Util::ChaCha(3) 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 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. perl v5.32.1 2018-11-15 Math::Prime::Util::ChaCha(3)
NAME | VERSION | SYNOPSIS | DESCRIPTION | FUNCTIONS | AUTHORS | ACKNOWLEDGEMENTS | COPYRIGHT
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