FAKE_RAND
FAKE_RAND *f;
((FAKE_RAND *)rng->algctx)->cb = cb;
FAKE_RAND *r = OPENSSL_zalloc(sizeof(*r));
FAKE_RAND *frng = (FAKE_RAND *)vrng;
FAKE_RAND *frng = (FAKE_RAND *)vrng;
FAKE_RAND *frng = (FAKE_RAND *)vrng;
FAKE_RAND *frng = (FAKE_RAND *)vrng;