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#!/usr/bin/env python
"""Unit tests for M2Crypto.DH.
Copyright (c) 2000 Ng Pheng Siong. All rights reserved."""
from M2Crypto import DH, BIO, Rand
from tests import unittest
class DHTestCase(unittest.TestCase):
params = 'tests/dhparam.pem'
def genparam_callback(self, *args):
pass
def genparam_callback2(self):
pass
def test_init_junk(self):
with self.assertRaises(TypeError):
DH.DH('junk')
def test_gen_params(self):
a = DH.gen_params(1024, 2, self.genparam_callback)
self.assertEqual(a.check_params(), 0)
def test_gen_params_bad_cb(self):
a = DH.gen_params(1024, 2, self.genparam_callback2)
self.assertEqual(a.check_params(), 0)
def test_print_params(self):
a = DH.gen_params(1024, 2, self.genparam_callback)
bio = BIO.MemoryBuffer()
a.print_params(bio)
params = bio.read()
self.assertTrue(params.find(b'(1024 bit)'))
self.assertTrue(params.find(b'generator: 2 (0x2)'))
def test_load_params(self):
a = DH.load_params('tests/dhparams.pem')
self.assertEqual(a.check_params(), 0)
def test_compute_key(self):
a = DH.load_params('tests/dhparams.pem')
b = DH.set_params(a.p, a.g)
a.gen_key()
b.gen_key()
ak = a.compute_key(b.pub)
bk = b.compute_key(a.pub)
self.assertEqual(ak, bk)
self.assertEqual(len(a), 128)
with self.assertRaises(DH.DHError):
setattr(a, 'p', 1)
with self.assertRaises(DH.DHError):
setattr(a, 'priv', 1)
def suite():
return unittest.makeSuite(DHTestCase)
if __name__ == '__main__':
Rand.load_file('randpool.dat', -1)
unittest.TextTestRunner().run(suite())
Rand.save_file('randpool.dat')
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