def test_change(self):
out = StringIO.StringIO()
diph.encrypt_first('foo', self.A, out=out)
cipher_text_1 = out.getvalue()
out = StringIO.StringIO()
diph.encrypt('foo', self.A_change, cipher_text_1, out=out)
cipher_text_2 = out.getvalue()
self.assertTrue(cipher_text_1 != cipher_text_2)
def test_decrypt(self):
out = StringIO.StringIO()
diph.encrypt_first('foo', self.A, out=out)
cipher_text = out.getvalue()
out = StringIO.StringIO()
diph.decrypt('foo', cipher_text, out=out)
plain_text = out.getvalue()
self.assertEquals(self.A, plain_text)
def test_conflict_print(self):
out = StringIO.StringIO()
diph.encrypt_first('foo', self.A, out=out)
cipher_text_1 = out.getvalue()
out = StringIO.StringIO()
diph.encrypt('foo', self.A_change, cipher_text_1, out=out)
cipher_text_2a = out.getvalue()
out = StringIO.StringIO()
diph.encrypt('foo', self.A_change2, cipher_text_1, out=out)
cipher_text_2b = out.getvalue()
print cipher_text_2a
print cipher_text_2b
def test_no_counter_reuse_on_removal(self):
"""Removing lines from the end of the file makes it easy to
reuse counters. Test that.
"""
counters = {}
out = StringIO.StringIO()
diph.encrypt_first('foo', self.A, out=out)
cipher_text_1 = out.getvalue()
#print cipher_text_1
for line in cipher_text_1.split('\n'):
if line.startswith('?c'):
c, cnt, ciph = line.split()
counters[cnt] = ciph
out = StringIO.StringIO()
diph.encrypt('foo', self.A_remove, cipher_text_1, out=out)
cipher_text_2 = out.getvalue()
#print cipher_text_2
for line in cipher_text_2.split('\n'):
if line.startswith('?c'):
c, cnt, ciph = line.split()
if cnt in counters:
self.assertEquals(counters[cnt], ciph)
out = StringIO.StringIO()
diph.encrypt('foo', self.A_remove_append, cipher_text_2, out=out)
cipher_text_3 = out.getvalue()
#print cipher_text_3
for line in cipher_text_3.split('\n'):
if line.startswith('?c'):
c, cnt, ciph = line.split()
if cnt in counters:
self.assertEquals(counters[cnt], ciph)
def test_pragma(self):
out = StringIO.StringIO()
diph.encrypt_first('foo', self.A_pragma, out=out)
cipher_text_1 = out.getvalue()
self.assertTrue('?m 9000' in cipher_text_1)