From 10512fc50e6184397206a41c157c09d9b02e9e1a Mon Sep 17 00:00:00 2001 From: David Timber Date: Sat, 11 Jan 2020 18:03:47 +1100 Subject: staged resolv_worker * replaced RNG from `rnd` to `mbedtls_ctr_drbg` * use of `uint_fastN_t` where appropriate * heartbeat protocol draft * improved worker scheduling mech --- src/rnd.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'src/rnd.c') diff --git a/src/rnd.c b/src/rnd.c index 597aa60..b44b07e 100644 --- a/src/rnd.c +++ b/src/rnd.c @@ -2,6 +2,10 @@ #include "util_rt.h" #include +#include + +#include +#include #define N ((size_t)624) @@ -92,3 +96,26 @@ uint32_t prne_rnd_gen_int (prne_rnd_engine_t *engine) { double prne_rnd_gen_double (prne_rnd_engine_t *engine) { return (double)prne_rnd_gen_int(engine) * 2.3283064370807974e-10; } + +prne_rnd_engine_t *prne_mk_rnd_engine (void) { + uint32_t seed = 0; + prne_rnd_engnie_alloc_result_t ret; + + getrandom(&seed, sizeof(uint32_t), 0); + + if (seed == 0) { + // fall back to seeding with what's available. + seed = + (uint32_t)(time(NULL) % 0xFFFFFFFF) ^ + (uint32_t)(getpid() % 0xFFFFFFFF) ^ + (uint32_t)(getppid() % 0xFFFFFFFF) ^ + (uint32_t)(clock() % 0xFFFFFFFF); + } + + ret = prne_alloc_rnd_engine(seed == 0 ? NULL : &seed); + if (ret.result != PRNE_RND_ENGINE_ALLOC_OK) { + return NULL; + } + + return ret.engine; +} -- cgit