#!/usr/bin/env python
"""
Unit tests for M2Crypto.BN.
Copyright (c) 2005 Open Source Applications Foundation. All rights reserved.
"""
import unittest, re
from M2Crypto import BN, Rand
loops = 16
class BNTestCase(unittest.TestCase):
def check_rand(self):
# defaults
for x in range(loops):
r8 = BN.rand(8)
# top
for x in range(loops):
r8 = BN.rand(8, top=0)
assert r8 & 128
for x in range(loops):
r8 = BN.rand(8, top=1)
assert r8 & 192
# bottom
for x 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 x 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 check_rand_range(self):
# small range
for x in range(loops):
r = BN.rand_range(1)
assert r == 0
for x in range(loops):
r = BN.rand_range(4)
assert 0 <= r < 4
# large range
r512 = BN.rand(512, top=0)
for x in range(loops):
r = BN.rand_range(r512)
assert 0 <= r < r512
def check_randfname(self):
m = re.compile('^[a-zA-Z0-9]{8}$')
for x in range(loops):
r = BN.randfname(8)
assert m.match(r)
def suite():
return unittest.makeSuite(BNTestCase, 'check')
if __name__ == '__main__':
Rand.load_file('randpool.dat', -1)
unittest.TextTestRunner().run(suite())
Rand.save_file('randpool.dat')