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Windows: use CPU RDRAND or RDSEED as an additional entropy source for our random generator when available

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This commit is contained in:
Mounir IDRASSI
2019-01-31 01:05:19 +01:00
parent 915855f43b
commit 61c1baa4bf
8 changed files with 544 additions and 5 deletions
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32
src/Crypto/rdrand.c Normal file
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// 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;
}