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Use a securely seeded global PRNG for the VM.

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It's not 2005 anymore.
This commit is contained in:
Mike Pall
2020-06-15 12:21:05 +02:00
parent 34e53736c6
commit a44f53acf5
22 changed files with 411 additions and 174 deletions
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24
src/lj_prng.h Normal file
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/*
** Pseudo-random number generation.
** Copyright (C) 2005-2020 Mike Pall. See Copyright Notice in luajit.h
*/
#ifndef _LJ_PRNG_H
#define _LJ_PRNG_H
#include "lj_def.h"
LJ_FUNC int LJ_FASTCALL lj_prng_seed_secure(PRNGState *rs);
LJ_FUNC uint64_t LJ_FASTCALL lj_prng_u64(PRNGState *rs);
LJ_FUNC uint64_t LJ_FASTCALL lj_prng_u64d(PRNGState *rs);
/* This is just the precomputed result of lib_math.c:random_seed(rs, 0.0). */
static LJ_AINLINE void lj_prng_seed_fixed(PRNGState *rs)
{
rs->u[0] = U64x(a0d27757,0a345b8c);
rs->u[1] = U64x(764a296c,5d4aa64f);
rs->u[2] = U64x(51220704,070adeaa);
rs->u[3] = U64x(2a2717b5,a7b7b927);
}
#endif