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Issue #25003: On Solaris 11.3 or newer, os.urandom() now uses the getrandom()

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function instead of the getentropy() function. The getentropy() function is
blocking to generate very good quality entropy, os.urandom() doesn't need such
high-quality entropy.
This commit is contained in:
Victor Stinner 2015-10-01 09:47:30 +02:00
parent 87bddbac9d
commit bae2d6203f
6 changed files with 118 additions and 27 deletions
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14
Lib/test/test_os.py
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@ -1226,13 +1226,15 @@ class URandomTests(unittest.TestCase):
self.assertNotEqual(data1, data2)
HAVE_GETENTROPY = (sysconfig.get_config_var('HAVE_GETENTROPY') == 1)
HAVE_GETRANDOM = (sysconfig.get_config_var('HAVE_GETRANDOM_SYSCALL') == 1)
# os.urandom() doesn't use a file descriptor when it is implemented with the
# getentropy() function, the getrandom() function or the getrandom() syscall
OS_URANDOM_DONT_USE_FD = (
sysconfig.get_config_var('HAVE_GETENTROPY') == 1
or sysconfig.get_config_var('HAVE_GETRANDOM') == 1
or sysconfig.get_config_var('HAVE_GETRANDOM_SYSCALL') == 1)
@unittest.skipIf(HAVE_GETENTROPY,
"getentropy() does not use a file descriptor")
@unittest.skipIf(HAVE_GETRANDOM,
"getrandom() does not use a file descriptor")
@unittest.skipIf(OS_URANDOM_DONT_USE_FD ,
"os.random() does not use a file descriptor")
class URandomFDTests(unittest.TestCase):
@unittest.skipUnless(resource, "test requires the resource module")
def test_urandom_failure(self):