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author | mame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-09-09 15:19:19 +0000 |
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committer | mame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-09-09 15:19:19 +0000 |
commit | 7451ec065cc09758a49bbbf696b57da23e7f83ea (patch) | |
tree | 6b57d79afc79514ddf349b8716532ac53cd5b5a9 /random.c | |
parent | 86d76173de0864c1293801907c4cf56df627320d (diff) | |
download | ruby-7451ec065cc09758a49bbbf696b57da23e7f83ea.tar.gz |
Add a note to Random.urandom
The method may return nil for some reasons.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59803 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'random.c')
-rw-r--r-- | random.c | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -606,8 +606,10 @@ random_seed(void) * call-seq: Random.urandom(size) -> string * * Returns a string, using platform providing features. - * Returned value expected to be a cryptographically secure + * Returned value is expected to be a cryptographically secure * pseudo-random number in binary form. + * This method returns nil if the feature provided by platform + * failed to prepare the result. * * In 2017, Linux manpage random(7) writes that "no cryptographic * primitive available today can hope to promise more than 256 bits of |