RE: Problems with CSPRNG in wrapper.c

From: rsbecker@nexbridge.com <rsbecker@nexbridge.com>
Date: Feb 27, 2023, 23:23 UTC
Message-ID: <003e01d94b02$877c2c20$96748460$@nexbridge.com>
In-Reply-To: <xmqqv8jmr98f.fsf@gitster.g>

On Monday, February 27, 2023 6:15 PM, Junio C Hamano wrote:

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><rsbecker@nexbridge.com> writes:
>
>> First, I was not aware that csprng was a git dependency ...
>
>You can choose from implementations that depend on common external

libraries

>and system functions, but we have a fallback internal implementation that

only

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>requires /dev/urandom.
>
>See description for CSPRNG_METHOD in Makefile and 05cd988d (wrapper:
>add a helper to generate numbers from a CSPRNG, 2022-01-17) for additional
>background.

I have already been down that path, but not successfully. /dev/urandom is not available on the platform - never has, never will to my knowledge. This does appear to work if PRNGD is correctly running, but I can't seem to get that to work on this site. The config.mak.uname for NonStop does specify:

CSPRNG_METHOD = openssl

which should use OPENSSL_random(), shouldn't it? OpenSSL 3.0 uses the _rdrand() builtin so should ever go to PRNGD, but it seems like this is anyway. Debugging isn't possible as this is not on my own systems - and things work here. Is there any kind of tracing I can do?