ARC4RANDOM_EXPORT int
arc4random_stir(void)
{
int val;
ARC4_LOCK_();
val = arc4_stir();
ARC4_UNLOCK_();
return val;
}
int
evutil_secure_rng_set_urandom_device_file(char *fname)
{
#ifdef TRY_SEED_URANDOM
ARC4_LOCK_();
arc4random_urandom_filename = fname;
ARC4_UNLOCK_();
#endif
return 0;
}
ARC4RANDOM_EXPORT ARC4RANDOM_UINT32
arc4random(void)
{
ARC4RANDOM_UINT32 val;
ARC4_LOCK_();
arc4_count -= 4;
arc4_stir_if_needed();
val = arc4_getword();
ARC4_UNLOCK_();
return val;
}
int
evutil_secure_rng_init(void)
{
int val;
ARC4_LOCK_();
if (!arc4_seeded_ok)
arc4_stir();
val = arc4_seeded_ok ? 0 : -1;
ARC4_UNLOCK_();
return val;
}
ARC4RANDOM_EXPORT void
arc4random_buf(void *buf_, size_t n)
{
unsigned char *buf = buf_;
ARC4_LOCK_();
arc4_stir_if_needed();
while (n--) {
if (--arc4_count <= 0)
arc4_stir();
buf[n] = arc4_getbyte();
}
ARC4_UNLOCK_();
}
ARC4RANDOM_EXPORT void
arc4random_addrandom(const unsigned char *dat, int datlen)
{
int j;
ARC4_LOCK_();
if (!rs_initialized)
arc4_stir();
for (j = 0; j < datlen; j += 256) {
/* arc4_addrandom() ignores all but the first 256 bytes of
* its input. We want to make sure to look at ALL the
* data in 'dat', just in case the user is doing something
* crazy like passing us all the files in /var/log. */
arc4_addrandom(dat + j, datlen - j);
}
ARC4_UNLOCK_();
}
