From 247dc1bd0bd9ee2b9525495c0dbd819baf10ec1f Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Fri, 3 May 2019 12:38:03 +0100 Subject: Use SystemRandom for token generation --- synapse/util/stringutils.py | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'synapse/util') diff --git a/synapse/util/stringutils.py b/synapse/util/stringutils.py index fdcb375f95..69dffd8244 100644 --- a/synapse/util/stringutils.py +++ b/synapse/util/stringutils.py @@ -24,14 +24,19 @@ _string_with_symbols = ( string.digits + string.ascii_letters + ".,;:^&*-_+=#~@" ) +# random_string and random_string_with_symbols are used for a range of things, +# some cryptographically important, some less so. We use SystemRandom to make sure +# we get cryptographically-secure randoms. +rand = random.SystemRandom() + def random_string(length): - return ''.join(random.choice(string.ascii_letters) for _ in range(length)) + return ''.join(rand.choice(string.ascii_letters) for _ in range(length)) def random_string_with_symbols(length): return ''.join( - random.choice(_string_with_symbols) for _ in range(length) + rand.choice(_string_with_symbols) for _ in range(length) ) -- cgit 1.4.1