Switch from using PyCrypto's Random to using os.urandom.

There's several reasons for this change:

1) It's faster for reads up to 1024 bytes (nearly 10x faster for 16 byte reads)
2) It receives considerably more security review since it's in the kernel.
3) It's yet another step towards running on PyPy.
4) Using userspace CSPRNGs is considered something of an anti-pattern. See:
   http://sockpuppet.org/blog/2014/02/25/safely-generate-random-numbers/
   http://webcache.googleusercontent.com/search?q=cache:2nTvpCgKZXIJ:www.2uo.de/myths-about-urandom/+&cd=3&hl=en&ct=clnk&gl=us

1 files changed, 0 insertions, 6 deletions

diff --git a/tests/test_util.py b/tests/test_util.py
index 6bde4045..d3911f49 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -153,12 +153,6 @@ class UtilTest(ParamikoTest):
         finally:
             os.unlink('hostfile.temp')
 
-    def test_6_random(self):
-        from paramiko.common import rng
-        # just verify that we can pull out 32 bytes and not get an exception.
-        x = rng.read(32)
-        self.assertEqual(len(x), 32)
-
     def test_7_host_config_expose_issue_33(self):
         test_config_file = """
 Host www13.*