Pedro Falcato 6ca9334dc8 MdePkg/BaseRngLib: Add a smoketest for RDRAND and check CPUID ... RDRAND has notoriously been broken many times over its lifespan. Add a smoketest to RDRAND, in order to better sniff out potential security concerns. Also add a proper CPUID test in order to support older CPUs which may not have it; it was previously being tested but then promptly ignored. Testing algorithm inspired by linux's arch/x86/kernel/cpu/rdrand.c :x86_init_rdrand() per commit 049f9ae9.. Many thanks to Jason Donenfeld for relicensing his linux RDRAND detection code to MIT and the public domain. >On Tue, Nov 22, 2022 at 2:21 PM Jason A. Donenfeld <Jason@zx2c4.com> wrote: <..> > I (re)wrote that function in Linux. I hereby relicense it as MIT, and > also place it into public domain. Do with it what you will now. > > Jason BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4163 Signed-off-by: Pedro Falcato <pedro.falcato@gmail.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Cc: Jason A. Donenfeld <Jason@zx2c4.com>		2024-09-09 11:45:06 +01:00
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RdRand.c	MdePkg/BaseRngLib: Add a smoketest for RDRAND and check CPUID	2024-09-09 11:45:06 +01:00