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// version 20230126
// public domain
// djb
// automatic-alternatives 1 getrandom_wrapper.o getentropy_wrapper.o devurandom_wrapper.o
#include <unistd.h>
#include "getrandom_wrapper.h"
#include "getentropy_wrapper.h"
#include "devurandom_wrapper.h"
#include "randombytes.h"
static enum {
use_nothing,
use_getrandom,
use_getentropy,
use_devurandom
} use = use_nothing;
__attribute__((constructor))
static void startup(void)
{
if (getrandom_wrapper_ready()) { use = use_getrandom; return; }
if (getentropy_wrapper_ready()) { use = use_getentropy; return; }
if (devurandom_wrapper_ready()) { use = use_devurandom; return; }
}
void randombytes(void *x,long long xbytes)
{
if (use == use_getrandom) { getrandom_wrapper(x,xbytes); return; }
if (use == use_getentropy) { getentropy_wrapper(x,xbytes); return; }
if (use == use_devurandom) { devurandom_wrapper(x,xbytes); return; }
for (;;) pause();
}
const char *randombytes_source(void)
{
if (use == use_getrandom) return "kernel-getrandom";
if (use == use_getentropy) return "kernel-getentropy";
if (use == use_devurandom) return "kernel-devurandom";
return "kernel-nothing";
}
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