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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-10-30 08:45:01 +0100 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-10-30 08:53:03 +0100 |
| commit | 5ecff99edc9c342987ef59156c2358a4c24ce9b5 (patch) | |
| tree | 96c5db33afa9394231f91669b6e2de4873892a40 /src/Crypto | |
| parent | 7a35ecb154fc979d46dea8d97d0ad97fd4ae4140 (diff) | |
| download | VeraCrypt-5ecff99edc9c342987ef59156c2358a4c24ce9b5.tar.gz VeraCrypt-5ecff99edc9c342987ef59156c2358a4c24ce9b5.zip | |
Add check for buggy RDRAND (AMD Ryzen CPU case) even if we always use RDSEED instead of RDRAND when RDSEED is available (which is the case on modern CPUs)
Diffstat (limited to 'src/Crypto')
| -rw-r--r-- | src/Crypto/cpu.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/Crypto/cpu.c b/src/Crypto/cpu.c index 62574983..33a9815e 100644 --- a/src/Crypto/cpu.c +++ b/src/Crypto/cpu.c @@ -2,6 +2,7 @@ #include "cpu.h" #include "misc.h" +#include "rdrand.h" #ifndef EXCEPTION_EXECUTE_HANDLER #define EXCEPTION_EXECUTE_HANDLER 1 @@ -387,6 +388,18 @@ void DetectX86Features() } } + /* Add check fur buggy RDRAND (AMD Ryzen case) even if we always use RDSEED instead of RDRAND when RDSEED available */ + if (g_hasRDRAND) + { + if ( RDRAND_getBytes ((unsigned char*) cpuid, sizeof (cpuid)) + && (cpuid[0] == 0xFFFFFFFF) && (cpuid[1] == 0xFFFFFFFF) + && (cpuid[2] == 0xFFFFFFFF) && (cpuid[3] == 0xFFFFFFFF) + ) + { + g_hasRDRAND = 0; + } + } + if (!g_cacheLineSize) g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE; |