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26 lines
800 B
C
26 lines
800 B
C
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/* Copyright (c) 2003, Roger Dingledine
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2018, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#ifndef TOR_WEAKRNG_H
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#define TOR_WEAKRNG_H
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#include "lib/cc/torint.h"
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/* ===== Insecure rng */
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typedef struct tor_weak_rng_t {
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uint32_t state;
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} tor_weak_rng_t;
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#define TOR_WEAK_RNG_INIT {383745623}
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#define TOR_WEAK_RANDOM_MAX (INT_MAX)
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void tor_init_weak_random(tor_weak_rng_t *weak_rng, unsigned seed);
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int32_t tor_weak_random(tor_weak_rng_t *weak_rng);
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int32_t tor_weak_random_range(tor_weak_rng_t *rng, int32_t top);
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/** Randomly return true according to <b>rng</b> with probability 1 in
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* <b>n</b> */
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#define tor_weak_random_one_in_n(rng, n) (0==tor_weak_random_range((rng),(n)))
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#endif
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