diff options
| author | David Goulet <dgoulet@torproject.org> | 2019-03-01 09:36:23 -0500 |
|---|---|---|
| committer | David Goulet <dgoulet@torproject.org> | 2019-03-01 09:36:23 -0500 |
| commit | 13e93bdfd5a3bc8349723a0e3a9e05f2dd300f99 (patch) | |
| tree | 6e5d1e896150cb136fb092ca9a5633c93d3c7e85 /src/lib/crypt_ops | |
| parent | cb0d40304968735db5e85fc81e451a149bf05cc0 (diff) | |
| parent | 64f594499a3e8893a6097fa5db7d47962f83d2f5 (diff) | |
| download | tor-13e93bdfd5a3bc8349723a0e3a9e05f2dd300f99.tar.gz tor-13e93bdfd5a3bc8349723a0e3a9e05f2dd300f99.zip | |
Merge branch 'tor-github/pr/718'
Diffstat (limited to 'src/lib/crypt_ops')
| -rw-r--r-- | src/lib/crypt_ops/crypto_rand.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/lib/crypt_ops/crypto_rand.h b/src/lib/crypt_ops/crypto_rand.h index 6eef22ed4d..6f09aedf6a 100644 --- a/src/lib/crypt_ops/crypto_rand.h +++ b/src/lib/crypt_ops/crypto_rand.h @@ -68,6 +68,15 @@ unsigned crypto_fast_rng_get_uint(crypto_fast_rng_t *rng, unsigned limit); uint64_t crypto_fast_rng_get_uint64(crypto_fast_rng_t *rng, uint64_t limit); double crypto_fast_rng_get_double(crypto_fast_rng_t *rng); +/** + * Using the fast_rng <b>rng</b>, yield true with probability + * 1/<b>n</b>. Otherwise yield false. + * + * <b>n</b> must not be zero. + **/ +#define crypto_fast_rng_one_in_n(rng, n) \ + (0 == (crypto_fast_rng_get_uint((rng), (n)))) + crypto_fast_rng_t *get_thread_fast_rng(void); #ifdef CRYPTO_PRIVATE |