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- /* Copyright (c) 2003, Roger Dingledine
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2019, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file weakrng.h
- *
- * \brief Header for weakrng.c
- **/
- #ifndef TOR_WEAKRNG_H
- #define TOR_WEAKRNG_H
- #include "lib/cc/torint.h"
- /* ===== Insecure rng */
- typedef struct tor_weak_rng_t {
- uint32_t state;
- } tor_weak_rng_t;
- #define TOR_WEAK_RNG_INIT {383745623}
- #define TOR_WEAK_RANDOM_MAX (INT_MAX)
- void tor_init_weak_random(tor_weak_rng_t *weak_rng, unsigned seed);
- int32_t tor_weak_random(tor_weak_rng_t *weak_rng);
- int32_t tor_weak_random_range(tor_weak_rng_t *rng, int32_t top);
- /** Randomly return true according to <b>rng</b> with probability 1 in
- * <b>n</b> */
- #define tor_weak_random_one_in_n(rng, n) (0==tor_weak_random_range((rng),(n)))
- #endif
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