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Windows: Use Hardware RNG based on CPU timing jitter "Jitterentropy" by Stephan Mueller as a good alternative to RDRAND (http://www.chronox.de/jent.html, smueller@chronox.de)

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This commit is contained in:
Mounir IDRASSI
2019-02-12 18:49:12 +01:00
parent a5943c07fb
commit 86f0fde6e7
12 changed files with 1084 additions and 5 deletions
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27
src/Common/Random.c
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@@ -15,6 +15,7 @@
#include "Crc.h"
#include "Random.h"
#include "Crypto\cpu.h"
#include "Crypto\jitterentropy.h"
#include "Crypto\rdrand.h"
#include <Strsafe.h>
@@ -776,6 +777,19 @@ BOOL SlowPoll (void)
return FALSE;
}
/* use JitterEntropy library to get good quality random bytes based on CPU timing jitter */
if (0 == jent_entropy_init ())
{
struct rand_data *ec = jent_entropy_collector_alloc (1, 0);
if (ec)
{
ssize_t rndLen = jent_read_entropy (ec, (char*) buffer, sizeof (buffer));
if (rndLen > 0)
RandaddBuf (buffer, (int) rndLen);
jent_entropy_collector_free (ec);
}
}
// use RDSEED or RDRAND from CPU as source of entropy if present
if ( IsCpuRngEnabled() &&
( (HasRDSEED() && RDSEED_getBytes (buffer, sizeof (buffer)))
@@ -908,6 +922,19 @@ BOOL FastPoll (void)
return FALSE;
}
/* use JitterEntropy library to get good quality random bytes based on CPU timing jitter */
if (0 == jent_entropy_init ())
{
struct rand_data *ec = jent_entropy_collector_alloc (1, 0);
if (ec)
{
ssize_t rndLen = jent_read_entropy (ec, (char*) buffer, sizeof (buffer));
if (rndLen > 0)
RandaddBuf (buffer, (int) rndLen);
jent_entropy_collector_free (ec);
}
}
// use RDSEED or RDRAND from CPU as source of entropy if enabled
if ( IsCpuRngEnabled() &&
( (HasRDSEED() && RDSEED_getBytes (buffer, sizeof (buffer)))