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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-01-31 01:05:19 +0100 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-02-01 00:35:50 +0100 |
| commit | 61c1baa4bf5a97675187a37cf203e1937a060daa (patch) | |
| tree | dbf4cba079f6497740fecd325b22bf47f6a03731 /src/Crypto/rdrand.c | |
| parent | 915855f43b6bd30c2e01a49e261f813ccc7a0237 (diff) | |
| download | VeraCrypt-61c1baa4bf5a97675187a37cf203e1937a060daa.tar.gz VeraCrypt-61c1baa4bf5a97675187a37cf203e1937a060daa.zip | |
Windows: use CPU RDRAND or RDSEED as an additional entropy source for our random generator when available
Diffstat (limited to 'src/Crypto/rdrand.c')
| -rw-r--r-- | src/Crypto/rdrand.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/Crypto/rdrand.c b/src/Crypto/rdrand.c new file mode 100644 index 00000000..afed7cd1 --- /dev/null +++ b/src/Crypto/rdrand.c @@ -0,0 +1,32 @@ +// rdrand.cpp - written and placed in public domain by Jeffrey Walton and Uri Blumenthal. + +/* modified for VeraCrypt */ + +#include "chacha256.h" +#include "cpu.h" +#include "misc.h" + +void CRYPTOPP_FASTCALL MASM_RDRAND_GenerateBlock(byte*, size_t); +void CRYPTOPP_FASTCALL MASM_RDSEED_GenerateBlock(byte*, size_t); + +int RDRAND_getBytes(unsigned char* buf, size_t bufLen) +{ + if (!buf || !HasRDRAND()) + return 0; + + if (bufLen) + MASM_RDRAND_GenerateBlock(buf, bufLen); + + return 1; +} + +int RDSEED_getBytes(unsigned char* buf, size_t bufLen) +{ + if (!buf || !HasRDSEED()) + return 0; + + if (bufLen) + MASM_RDSEED_GenerateBlock(buf, bufLen); + + return 1; +} |