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Disable both RDRAND and RDSEED if a failure is detected

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This commit is contained in:
Mounir IDRASSI 2019-10-30 09:08:38 +01:00
parent 5ecff99edc
commit 3565cb1afe
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GPG Key ID: 02C30AE90FAE4A6F
1 changed files with 13 additions and 0 deletions
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13
src/Crypto/cpu.c
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@ -397,6 +397,19 @@ void DetectX86Features()
) )
{ {
g_hasRDRAND = 0; g_hasRDRAND = 0;
g_hasRDSEED = 0;
}
}
if (g_hasRDSEED)
{
if ( RDSEED_getBytes ((unsigned char*) cpuid, sizeof (cpuid))
&& (cpuid[0] == 0xFFFFFFFF) && (cpuid[1] == 0xFFFFFFFF)
&& (cpuid[2] == 0xFFFFFFFF) && (cpuid[3] == 0xFFFFFFFF)
)
{
g_hasRDRAND = 0;
g_hasRDSEED = 0;
} }
} }