A hardware Random Number Generator (RNG) based on CPU timing jitter.
This is a rewrite of the jitterentropy-library by smuellerDD in Zig. If you need a RNG you should use the original.
From the original repository:
The Jitter RNG provides a noise source using the CPU execution timing jitter.
It does not depend on any system resource other than a high-resolution time stamp.
It is a small-scale, yet fast entropy source that is viable in almost all
environments and on a lot of CPU architectures.
The implementation of the Jitter RNG is independent of any operating system.
As such, it could even run on baremetal without any operating system.
The design of the RNG is given in the documentation found in at
http://www.chronox.de/jent.html . This documentation also covers the full
assessment of the SP800-90B compliance as well as all required test code.
---
Copyright (C) 2017 - 2022, Stephan Mueller <smueller@chronox.de>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
3. The name of the author may not be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.