def test_mode(self):
# Self test
import key_expander
import aes_cipher
import test_keys
test_data = test_keys.TestKeys()
test_expander = key_expander.KeyExpander(256)
test_expanded_key = test_expander.expand(test_data.test_mode_key)
test_cipher = aes_cipher.AESCipher(test_expanded_key)
test_cfb = CFBMode(test_cipher, 16)
test_cfb.set_iv(test_data.test_mode_iv)
for k in range(4):
self.assertEquals(len([i for i, j in zip(test_data.test_cfb_ciphertext[k],
test_cfb.encrypt_block(test_data.test_mode_plaintext[k])) if
i == j]),
16,
msg='CFB encrypt test block' + str(k))
test_cfb.set_iv(test_data.test_mode_iv)
for k in range(4):
self.assertEquals(len([i for i, j in zip(test_data.test_mode_plaintext[k],
test_cfb.decrypt_block(test_data.test_cfb_ciphertext[k])) if
i == j]),
16,
msg='CFB decrypt test block' + str(k))
def test_cipher(self):
"""Test AES cipher with all key lengths"""
import test_keys
import key_expander
test_data = test_keys.TestKeys()
for key_size in 128, 192, 256:
test_key_expander = key_expander.KeyExpander(key_size)
test_expanded_key = test_key_expander.expand(
test_data.test_key[key_size])
test_cipher = AESCipher(test_expanded_key)
test_result_ciphertext = test_cipher.cipher_block(
test_data.test_block_plaintext)
self.assertEquals(len([
i for i, j in zip(
test_result_ciphertext,
test_data.test_block_ciphertext_validated[key_size])
if i == j
]),
16,
msg='Test %d bit cipher' % key_size)
test_result_plaintext = test_cipher.decipher_block(
test_data.test_block_ciphertext_validated[key_size])
self.assertEquals(len([
i for i, j in zip(test_result_plaintext,
test_data.test_block_plaintext) if i == j
]),
16,
msg='Test %d bit decipher' % key_size)
def test_keys(self):
"""Test All Key Expansions"""
import test_keys
test_data = test_keys.TestKeys()
for key_size in 128, 192, 256:
test_expander = KeyExpander(key_size)
test_expanded_key = test_expander.expand(
test_data.test_key[key_size])
self.assertEqual(
len([
i for i, j in zip(
test_expanded_key,
test_data.test_expanded_key_validated[key_size])
if i == j
]),
len(test_data.test_expanded_key_validated[key_size]),
msg='Key expansion ' + str(key_size) + ' bit')