KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_generate_random_block(void *buf, size_t len)
{
static int rng_initialized = 0;
HEIMDAL_MUTEX_lock(&crypto_mutex);
if (!rng_initialized) {
if (seed_something())
krb5_abortx(NULL, "Fatal: could not seed the "
"random number generator");
rng_initialized = 1;
}
HEIMDAL_MUTEX_unlock(&crypto_mutex);
if (RAND_bytes(buf, len) <= 0)
krb5_abortx(NULL, "Failed to generate random block");
}
HEIMDAL_WARN_UNUSED_RESULT_ATTRIBUTE
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_generate_random(void *buf, size_t len)
{
static int rng_initialized = 0;
int ret;
HEIMDAL_MUTEX_lock(&crypto_mutex);
if (!rng_initialized) {
if (seed_something())
return HEIM_ERR_RANDOM_OFFLINE;
rng_initialized = 1;
}
if (RAND_bytes(buf, len) <= 0)
ret = HEIM_ERR_RANDOM_OFFLINE;
else
ret = 0;
HEIMDAL_MUTEX_unlock(&crypto_mutex);
return ret;
}