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#!/usr/bin/env python
"""
Unit tests for M2Crypto.BN.
Copyright (c) 2005 Open Source Applications Foundation. All rights reserved.
"""
import re
import warnings
from M2Crypto import BN, Rand
from tests import unittest
loops = 16
class BNTestCase(unittest.TestCase):
def test_rand(self):
# defaults
for _ in range(loops):
r8 = BN.rand(8)
# top
for _ in range(loops):
r8 = BN.rand(8, top=0)
assert r8 & 128
for _ in range(loops):
r8 = BN.rand(8, top=1)
assert r8 & 192
# bottom
for _ in range(loops):
r8 = BN.rand(8, bottom=1)
assert r8 % 2 == 1
# make sure we can get big numbers and work with them
for _ in range(loops):
r8 = BN.rand(8, top=0)
r16 = BN.rand(16, top=0)
r32 = BN.rand(32, top=0)
r64 = BN.rand(64, top=0)
r128 = BN.rand(128, top=0)
r256 = BN.rand(256, top=0)
r512 = BN.rand(512, top=0)
assert r8 < r16 < r32 < r64 < r128 < r256 < r512 < (r512 + 1)
def test_rand_range(self):
# small range
for _ in range(loops):
r = BN.rand_range(1)
self.assertEqual(r, 0)
for _ in range(loops):
r = BN.rand_range(4)
assert 0 <= r < 4
# large range
r512 = BN.rand(512, top=0)
for _ in range(loops):
r = BN.rand_range(r512)
assert 0 <= r < r512
def test_randfname(self):
m = re.compile('^[a-zA-Z0-9]{8}$')
for _ in range(loops):
with warnings.catch_warnings():
warnings.simplefilter('ignore', DeprecationWarning)
r = BN.randfname(8)
assert m.match(r)
def suite():
return unittest.TestLoader().loadTestsFromTestCase(BNTestCase)
if __name__ == '__main__':
Rand.load_file('randpool.dat', -1)
unittest.TextTestRunner().run(suite())
Rand.save_file('randpool.dat')
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