Request support for HRNG on ARM using their new RNDR / RNDRRS instructions. #26796

1. 
   h76oeI6pMxU9g4p8aCpc6Q commented at 7:46 pm on January 2, 2023: none

   Bitcoin Core currently only support to using RDRAND / RDSEED instruction on x86 architecture when requiring to generate a ultra high quality random numbers. For example, a private key. https://github.com/bitcoin/bitcoin/blob/master/src/random.h https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp

   ARM later added two new similar instructions as well, RNDR (similar to RDRAND) / RNDRRS (similar to RDSEED). https://developer.arm.com/documentation/ddi0601/2022-12/AArch64-Registers/RNDR--Random-Number https://developer.arm.com/documentation/ddi0601/2022-12/AArch64-Registers/RNDRRS--Reseeded-Random-Number

   OpenSSL also had a similar feature request on last year. (Implemented) https://github.com/openssl/openssl/issues/15627 https://github.com/openssl/openssl/pull/15361 https://github.com/openssl/openssl/blob/master/providers/implementations/rands/seeding/rand_cpu_arm64.c

   I hope this feature is also available on Bitcoin Core as Bitcoin Core also can using on ARM machine (E.g. A Mac computer using Apple silicon, Raspberry Pi…).

2. h76oeI6pMxU9g4p8aCpc6Q added the label Feature on Jan 2, 2023
3. maflcko added the label Utils/log/libs on Jan 3, 2023
4. 
   john-moffett commented at 11:50 pm on January 3, 2023: contributor

   It appears that these extensions aren’t supported by many hardware implementations yet (look under the ’rng’ column), including any Apple product or Raspberry Pi.

   That said, it would be a useful addition once they become more common.

5. bitcoin deleted a comment on Feb 13, 2023
6. achow101 closed this on Nov 7, 2023

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h76oeI6pMxU9g4p8aCpc6Q john-moffett

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Feature Utils/log/libs