/* Initialize this random subsystem. If FULL is false, this function
merely calls the basic initialization of the module and does not do
anything more. Doing this is not really required but when running
in a threaded environment we might get a race condition
otherwise. */
void
_gcry_random_initialize (int full)
{
static int nonce_initialized;
int err;
if (!nonce_initialized)
{
nonce_initialized = 1;
err = ath_mutex_init (&nonce_buffer_lock);
if (err)
log_fatal ("failed to create the nonce buffer lock: %s\n",
strerror (err) );
}
if (fips_mode ())
_gcry_rngfips_initialize (full);
else if (rng_types.standard)
_gcry_rngcsprng_initialize (full);
else if (rng_types.fips)
_gcry_rngfips_initialize (full);
else if (rng_types.system)
_gcry_rngsystem_initialize (full);
else
_gcry_rngcsprng_initialize (full);
}
/* Public function to fill the buffer with LENGTH bytes of
cryptographically strong random bytes. Level GCRY_WEAK_RANDOM is
here mapped to GCRY_STRONG_RANDOM, GCRY_STRONG_RANDOM is strong
enough for most usage, GCRY_VERY_STRONG_RANDOM is good for key
generation stuff but may be very slow. */
void
_gcry_rngsystem_randomize (void *buffer, size_t length,
enum gcry_random_level level)
{
_gcry_rngsystem_initialize (1); /* Auto-initialize if needed. */
if (level != GCRY_VERY_STRONG_RANDOM)
level = GCRY_STRONG_RANDOM;
lock_rng ();
get_random (buffer, length, level);
unlock_rng ();
}
/* Initialize this random subsystem. If FULL is false, this function
merely calls the basic initialization of the module and does not do
anything more. Doing this is not really required but when running
in a threaded environment we might get a race condition
otherwise. */
void
_gcry_random_initialize (int full)
{
if (fips_mode ())
_gcry_rngfips_initialize (full);
else if (rng_types.standard)
_gcry_rngcsprng_initialize (full);
else if (rng_types.fips)
_gcry_rngfips_initialize (full);
else if (rng_types.system)
_gcry_rngsystem_initialize (full);
else
_gcry_rngcsprng_initialize (full);
}
