From 252c90732709447ad33bbf329fc47d584cd23f37 Mon Sep 17 00:00:00 2001 From: Alex Funo Date: Wed, 9 Jul 2025 20:18:22 +0700 Subject: kernel: dev: Add /dev/random Introduce a prototype cryptographically secure (?) random number generator. The RNG uses ChaCha20 seeded with a SipHash-processed entropy pool. Entropy is collected only at read time and is mixed into the internal pool before each ChaCha20 reseed. The design is still experimental. Signed-off-by: Alex Funo Signed-off-by: Ian Moffett --- sys/include/dev/random/siphash.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 sys/include/dev/random/siphash.h (limited to 'sys/include/dev/random/siphash.h') diff --git a/sys/include/dev/random/siphash.h b/sys/include/dev/random/siphash.h new file mode 100644 index 0000000..ecabb4a --- /dev/null +++ b/sys/include/dev/random/siphash.h @@ -0,0 +1,34 @@ +/* + Copyright (c) 2013 Marek Majkowski + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. + + + Original location: + https://github.com/majek/csiphash/ + + Solution inspired by code from: + Samuel Neves (supercop/crypto_auth/siphash24/little) + djb (supercop/crypto_auth/siphash24/little2) + Jean-Philippe Aumasson (https://131002.net/siphash/siphash24.c) +*/ + +#include + +uint64_t siphash24(const void *src, unsigned long src_sz, const char k[16]); -- cgit v1.2.3