649 lines
24 KiB
Python
649 lines
24 KiB
Python
|
# ===================================================================
|
||
|
|
#
|
||
|
|
# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
|
||
|
|
# All rights reserved.
|
||
|
|
#
|
||
|
|
# Redistribution and use in source and binary forms, with or without
|
||
|
|
# modification, are permitted provided that the following conditions
|
||
|
|
# are met:
|
||
|
|
#
|
||
|
|
# 1. Redistributions of source code must retain the above copyright
|
||
|
|
# notice, this list of conditions and the following disclaimer.
|
||
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
# notice, this list of conditions and the following disclaimer in
|
||
|
|
# the documentation and/or other materials provided with the
|
||
|
|
# distribution.
|
||
|
|
#
|
||
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||
|
|
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||
|
|
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||
|
|
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||
|
|
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||
|
|
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
# POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
# ===================================================================
|
||
|
|
|
||
|
|
import os
|
||
|
|
import re
|
||
|
|
import unittest
|
||
|
|
from binascii import hexlify
|
||
|
|
|
||
|
|
from Crypto.Util.py3compat import b, tobytes, bchr, unhexlify
|
||
|
|
from Crypto.Util.strxor import strxor_c
|
||
|
|
from Crypto.Util.number import long_to_bytes
|
||
|
|
from Crypto.SelfTest.st_common import list_test_cases
|
||
|
|
|
||
|
|
from Crypto.Cipher import AES
|
||
|
|
from Crypto.Hash import SHAKE128
|
||
|
|
|
||
|
|
|
||
|
|
def get_tag_random(tag, length):
|
||
|
|
return SHAKE128.new(data=tobytes(tag)).read(length)
|
||
|
|
|
||
|
|
|
||
|
|
class OcbTests(unittest.TestCase):
|
||
|
|
|
||
|
|
key_128 = get_tag_random("key_128", 16)
|
||
|
|
nonce_96 = get_tag_random("nonce_128", 12)
|
||
|
|
data_128 = get_tag_random("data_128", 16)
|
||
|
|
|
||
|
|
def test_loopback_128(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
pt = get_tag_random("plaintext", 16 * 100)
|
||
|
|
ct, mac = cipher.encrypt_and_digest(pt)
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
pt2 = cipher.decrypt_and_verify(ct, mac)
|
||
|
|
self.assertEqual(pt, pt2)
|
||
|
|
|
||
|
|
def test_nonce(self):
|
||
|
|
# Nonce is optional
|
||
|
|
AES.new(self.key_128, AES.MODE_OCB)
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, self.nonce_96)
|
||
|
|
ct = cipher.encrypt(self.data_128)
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
self.assertEqual(ct, cipher.encrypt(self.data_128))
|
||
|
|
|
||
|
|
def test_nonce_must_be_bytes(self):
|
||
|
|
self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_OCB,
|
||
|
|
nonce='test12345678')
|
||
|
|
|
||
|
|
def test_nonce_length(self):
|
||
|
|
# nonce cannot be empty
|
||
|
|
self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=b(""))
|
||
|
|
|
||
|
|
# nonce can be up to 15 bytes long
|
||
|
|
for length in range(1, 16):
|
||
|
|
AES.new(self.key_128, AES.MODE_OCB, nonce=self.data_128[:length])
|
||
|
|
|
||
|
|
self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.data_128)
|
||
|
|
|
||
|
|
def test_block_size_128(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
self.assertEqual(cipher.block_size, AES.block_size)
|
||
|
|
|
||
|
|
# By default, a 15 bytes long nonce is randomly generated
|
||
|
|
nonce1 = AES.new(self.key_128, AES.MODE_OCB).nonce
|
||
|
|
nonce2 = AES.new(self.key_128, AES.MODE_OCB).nonce
|
||
|
|
self.assertEqual(len(nonce1), 15)
|
||
|
|
self.assertNotEqual(nonce1, nonce2)
|
||
|
|
|
||
|
|
def test_nonce_attribute(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
self.assertEqual(cipher.nonce, self.nonce_96)
|
||
|
|
|
||
|
|
# By default, a 15 bytes long nonce is randomly generated
|
||
|
|
nonce1 = AES.new(self.key_128, AES.MODE_OCB).nonce
|
||
|
|
nonce2 = AES.new(self.key_128, AES.MODE_OCB).nonce
|
||
|
|
self.assertEqual(len(nonce1), 15)
|
||
|
|
self.assertNotEqual(nonce1, nonce2)
|
||
|
|
|
||
|
|
def test_unknown_parameters(self):
|
||
|
|
self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_OCB,
|
||
|
|
self.nonce_96, 7)
|
||
|
|
self.assertRaises(TypeError, AES.new, self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96, unknown=7)
|
||
|
|
|
||
|
|
# But some are only known by the base cipher
|
||
|
|
# (e.g. use_aesni consumed by the AES module)
|
||
|
|
AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96,
|
||
|
|
use_aesni=False)
|
||
|
|
|
||
|
|
def test_null_encryption_decryption(self):
|
||
|
|
for func in "encrypt", "decrypt":
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
result = getattr(cipher, func)(b(""))
|
||
|
|
self.assertEqual(result, b(""))
|
||
|
|
|
||
|
|
def test_either_encrypt_or_decrypt(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.encrypt(b("xyz"))
|
||
|
|
self.assertRaises(TypeError, cipher.decrypt, b("xyz"))
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.decrypt(b("xyz"))
|
||
|
|
self.assertRaises(TypeError, cipher.encrypt, b("xyz"))
|
||
|
|
|
||
|
|
def test_data_must_be_bytes(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
self.assertRaises(TypeError, cipher.encrypt, 'test1234567890-*')
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
self.assertRaises(TypeError, cipher.decrypt, 'test1234567890-*')
|
||
|
|
|
||
|
|
def test_mac_len(self):
|
||
|
|
# Invalid MAC length
|
||
|
|
self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96, mac_len=7)
|
||
|
|
self.assertRaises(ValueError, AES.new, self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96, mac_len=16+1)
|
||
|
|
|
||
|
|
# Valid MAC length
|
||
|
|
for mac_len in range(8, 16 + 1):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96,
|
||
|
|
mac_len=mac_len)
|
||
|
|
_, mac = cipher.encrypt_and_digest(self.data_128)
|
||
|
|
self.assertEqual(len(mac), mac_len)
|
||
|
|
|
||
|
|
# Default MAC length
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
_, mac = cipher.encrypt_and_digest(self.data_128)
|
||
|
|
self.assertEqual(len(mac), 16)
|
||
|
|
|
||
|
|
def test_invalid_mac(self):
|
||
|
|
from Crypto.Util.strxor import strxor_c
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
ct, mac = cipher.encrypt_and_digest(self.data_128)
|
||
|
|
|
||
|
|
invalid_mac = strxor_c(mac, 0x01)
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
self.assertRaises(ValueError, cipher.decrypt_and_verify, ct,
|
||
|
|
invalid_mac)
|
||
|
|
|
||
|
|
def test_hex_mac(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
mac_hex = cipher.hexdigest()
|
||
|
|
self.assertEqual(cipher.digest(), unhexlify(mac_hex))
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.hexverify(mac_hex)
|
||
|
|
|
||
|
|
def test_message_chunks(self):
|
||
|
|
# Validate that both associated data and plaintext/ciphertext
|
||
|
|
# can be broken up in chunks of arbitrary length
|
||
|
|
|
||
|
|
auth_data = get_tag_random("authenticated data", 127)
|
||
|
|
plaintext = get_tag_random("plaintext", 127)
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.update(auth_data)
|
||
|
|
ciphertext, ref_mac = cipher.encrypt_and_digest(plaintext)
|
||
|
|
|
||
|
|
def break_up(data, chunk_length):
|
||
|
|
return [data[i:i+chunk_length] for i in range(0, len(data),
|
||
|
|
chunk_length)]
|
||
|
|
|
||
|
|
# Encryption
|
||
|
|
for chunk_length in 1, 2, 3, 7, 10, 13, 16, 40, 80, 128:
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
|
||
|
|
for chunk in break_up(auth_data, chunk_length):
|
||
|
|
cipher.update(chunk)
|
||
|
|
pt2 = b("")
|
||
|
|
for chunk in break_up(ciphertext, chunk_length):
|
||
|
|
pt2 += cipher.decrypt(chunk)
|
||
|
|
pt2 += cipher.decrypt()
|
||
|
|
self.assertEqual(plaintext, pt2)
|
||
|
|
cipher.verify(ref_mac)
|
||
|
|
|
||
|
|
# Decryption
|
||
|
|
for chunk_length in 1, 2, 3, 7, 10, 13, 16, 40, 80, 128:
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
|
||
|
|
for chunk in break_up(auth_data, chunk_length):
|
||
|
|
cipher.update(chunk)
|
||
|
|
ct2 = b("")
|
||
|
|
for chunk in break_up(plaintext, chunk_length):
|
||
|
|
ct2 += cipher.encrypt(chunk)
|
||
|
|
ct2 += cipher.encrypt()
|
||
|
|
self.assertEqual(ciphertext, ct2)
|
||
|
|
self.assertEqual(cipher.digest(), ref_mac)
|
||
|
|
|
||
|
|
|
||
|
|
class OcbFSMTests(unittest.TestCase):
|
||
|
|
|
||
|
|
key_128 = get_tag_random("key_128", 16)
|
||
|
|
nonce_96 = get_tag_random("nonce_128", 12)
|
||
|
|
data_128 = get_tag_random("data_128", 16)
|
||
|
|
|
||
|
|
def test_valid_init_encrypt_decrypt_digest_verify(self):
|
||
|
|
# No authenticated data, fixed plaintext
|
||
|
|
# Verify path INIT->ENCRYPT->ENCRYPT(NONE)->DIGEST
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
ct = cipher.encrypt(self.data_128)
|
||
|
|
ct += cipher.encrypt()
|
||
|
|
mac = cipher.digest()
|
||
|
|
|
||
|
|
# Verify path INIT->DECRYPT->DECRYPT(NONCE)->VERIFY
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.decrypt(ct)
|
||
|
|
cipher.decrypt()
|
||
|
|
cipher.verify(mac)
|
||
|
|
|
||
|
|
def test_invalid_init_encrypt_decrypt_digest_verify(self):
|
||
|
|
# No authenticated data, fixed plaintext
|
||
|
|
# Verify path INIT->ENCRYPT->DIGEST
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
ct = cipher.encrypt(self.data_128)
|
||
|
|
self.assertRaises(TypeError, cipher.digest)
|
||
|
|
|
||
|
|
# Verify path INIT->DECRYPT->VERIFY
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.decrypt(ct)
|
||
|
|
self.assertRaises(TypeError, cipher.verify)
|
||
|
|
|
||
|
|
def test_valid_init_update_digest_verify(self):
|
||
|
|
# No plaintext, fixed authenticated data
|
||
|
|
# Verify path INIT->UPDATE->DIGEST
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
mac = cipher.digest()
|
||
|
|
|
||
|
|
# Verify path INIT->UPDATE->VERIFY
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
cipher.verify(mac)
|
||
|
|
|
||
|
|
def test_valid_full_path(self):
|
||
|
|
# Fixed authenticated data, fixed plaintext
|
||
|
|
# Verify path INIT->UPDATE->ENCRYPT->ENCRYPT(NONE)->DIGEST
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
ct = cipher.encrypt(self.data_128)
|
||
|
|
ct += cipher.encrypt()
|
||
|
|
mac = cipher.digest()
|
||
|
|
|
||
|
|
# Verify path INIT->UPDATE->DECRYPT->DECRYPT(NONE)->VERIFY
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
cipher.decrypt(ct)
|
||
|
|
cipher.decrypt()
|
||
|
|
cipher.verify(mac)
|
||
|
|
|
||
|
|
def test_invalid_encrypt_after_final(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
cipher.encrypt(self.data_128)
|
||
|
|
cipher.encrypt()
|
||
|
|
self.assertRaises(TypeError, cipher.encrypt, self.data_128)
|
||
|
|
|
||
|
|
def test_invalid_decrypt_after_final(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
cipher.decrypt(self.data_128)
|
||
|
|
cipher.decrypt()
|
||
|
|
self.assertRaises(TypeError, cipher.decrypt, self.data_128)
|
||
|
|
|
||
|
|
def test_valid_init_digest(self):
|
||
|
|
# Verify path INIT->DIGEST
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.digest()
|
||
|
|
|
||
|
|
def test_valid_init_verify(self):
|
||
|
|
# Verify path INIT->VERIFY
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
mac = cipher.digest()
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.verify(mac)
|
||
|
|
|
||
|
|
def test_valid_multiple_encrypt_or_decrypt(self):
|
||
|
|
for method_name in "encrypt", "decrypt":
|
||
|
|
for auth_data in (None, b("333"), self.data_128,
|
||
|
|
self.data_128 + b("3")):
|
||
|
|
if auth_data is None:
|
||
|
|
assoc_len = None
|
||
|
|
else:
|
||
|
|
assoc_len = len(auth_data)
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
if auth_data is not None:
|
||
|
|
cipher.update(auth_data)
|
||
|
|
method = getattr(cipher, method_name)
|
||
|
|
method(self.data_128)
|
||
|
|
method(self.data_128)
|
||
|
|
method(self.data_128)
|
||
|
|
method(self.data_128)
|
||
|
|
method()
|
||
|
|
|
||
|
|
def test_valid_multiple_digest_or_verify(self):
|
||
|
|
# Multiple calls to digest
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
first_mac = cipher.digest()
|
||
|
|
for x in range(4):
|
||
|
|
self.assertEqual(first_mac, cipher.digest())
|
||
|
|
|
||
|
|
# Multiple calls to verify
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
for x in range(5):
|
||
|
|
cipher.verify(first_mac)
|
||
|
|
|
||
|
|
def test_valid_encrypt_and_digest_decrypt_and_verify(self):
|
||
|
|
# encrypt_and_digest
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
ct, mac = cipher.encrypt_and_digest(self.data_128)
|
||
|
|
|
||
|
|
# decrypt_and_verify
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
pt = cipher.decrypt_and_verify(ct, mac)
|
||
|
|
self.assertEqual(self.data_128, pt)
|
||
|
|
|
||
|
|
def test_invalid_mixing_encrypt_decrypt(self):
|
||
|
|
# Once per method, with or without assoc. data
|
||
|
|
for method1_name, method2_name in (("encrypt", "decrypt"),
|
||
|
|
("decrypt", "encrypt")):
|
||
|
|
for assoc_data_present in (True, False):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB,
|
||
|
|
nonce=self.nonce_96)
|
||
|
|
if assoc_data_present:
|
||
|
|
cipher.update(self.data_128)
|
||
|
|
getattr(cipher, method1_name)(self.data_128)
|
||
|
|
self.assertRaises(TypeError, getattr(cipher, method2_name),
|
||
|
|
self.data_128)
|
||
|
|
|
||
|
|
def test_invalid_encrypt_or_update_after_digest(self):
|
||
|
|
for method_name in "encrypt", "update":
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.encrypt(self.data_128)
|
||
|
|
cipher.encrypt()
|
||
|
|
cipher.digest()
|
||
|
|
self.assertRaises(TypeError, getattr(cipher, method_name),
|
||
|
|
self.data_128)
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.encrypt_and_digest(self.data_128)
|
||
|
|
|
||
|
|
def test_invalid_decrypt_or_update_after_verify(self):
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
ct = cipher.encrypt(self.data_128)
|
||
|
|
ct += cipher.encrypt()
|
||
|
|
mac = cipher.digest()
|
||
|
|
|
||
|
|
for method_name in "decrypt", "update":
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.decrypt(ct)
|
||
|
|
cipher.decrypt()
|
||
|
|
cipher.verify(mac)
|
||
|
|
self.assertRaises(TypeError, getattr(cipher, method_name),
|
||
|
|
self.data_128)
|
||
|
|
|
||
|
|
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
|
||
|
|
cipher.decrypt_and_verify(ct, mac)
|
||
|
|
self.assertRaises(TypeError, getattr(cipher, method_name),
|
||
|
|
self.data_128)
|
||
|
|
|
||
|
|
|
||
|
|
class OcbRfc7253Test(unittest.TestCase):
|
||
|
|
|
||
|
|
# Tuple with
|
||
|
|
# - nonce
|
||
|
|
# - authenticated data
|
||
|
|
# - plaintext
|
||
|
|
# - ciphertext and 16 byte MAC tag
|
||
|
|
tv1_key = "000102030405060708090A0B0C0D0E0F"
|
||
|
|
tv1 = (
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221100",
|
||
|
|
"",
|
||
|
|
"",
|
||
|
|
"785407BFFFC8AD9EDCC5520AC9111EE6"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221101",
|
||
|
|
"0001020304050607",
|
||
|
|
"0001020304050607",
|
||
|
|
"6820B3657B6F615A5725BDA0D3B4EB3A257C9AF1F8F03009"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221102",
|
||
|
|
"0001020304050607",
|
||
|
|
"",
|
||
|
|
"81017F8203F081277152FADE694A0A00"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221103",
|
||
|
|
"",
|
||
|
|
"0001020304050607",
|
||
|
|
"45DD69F8F5AAE72414054CD1F35D82760B2CD00D2F99BFA9"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221104",
|
||
|
|
"000102030405060708090A0B0C0D0E0F",
|
||
|
|
"000102030405060708090A0B0C0D0E0F",
|
||
|
|
"571D535B60B277188BE5147170A9A22C3AD7A4FF3835B8C5"
|
||
|
|
"701C1CCEC8FC3358"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221105",
|
||
|
|
"000102030405060708090A0B0C0D0E0F",
|
||
|
|
"",
|
||
|
|
"8CF761B6902EF764462AD86498CA6B97"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221106",
|
||
|
|
"",
|
||
|
|
"000102030405060708090A0B0C0D0E0F",
|
||
|
|
"5CE88EC2E0692706A915C00AEB8B2396F40E1C743F52436B"
|
||
|
|
"DF06D8FA1ECA343D"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221107",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617",
|
||
|
|
"1CA2207308C87C010756104D8840CE1952F09673A448A122"
|
||
|
|
"C92C62241051F57356D7F3C90BB0E07F"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221108",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617",
|
||
|
|
"",
|
||
|
|
"6DC225A071FC1B9F7C69F93B0F1E10DE"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA99887766554433221109",
|
||
|
|
"",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617",
|
||
|
|
"221BD0DE7FA6FE993ECCD769460A0AF2D6CDED0C395B1C3C"
|
||
|
|
"E725F32494B9F914D85C0B1EB38357FF"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA9988776655443322110A",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F",
|
||
|
|
"BD6F6C496201C69296C11EFD138A467ABD3C707924B964DE"
|
||
|
|
"AFFC40319AF5A48540FBBA186C5553C68AD9F592A79A4240"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA9988776655443322110B",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F",
|
||
|
|
"",
|
||
|
|
"FE80690BEE8A485D11F32965BC9D2A32"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA9988776655443322110C",
|
||
|
|
"",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F",
|
||
|
|
"2942BFC773BDA23CABC6ACFD9BFD5835BD300F0973792EF4"
|
||
|
|
"6040C53F1432BCDFB5E1DDE3BC18A5F840B52E653444D5DF"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA9988776655443322110D",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F2021222324252627",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F2021222324252627",
|
||
|
|
"D5CA91748410C1751FF8A2F618255B68A0A12E093FF45460"
|
||
|
|
"6E59F9C1D0DDC54B65E8628E568BAD7AED07BA06A4A69483"
|
||
|
|
"A7035490C5769E60"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA9988776655443322110E",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F2021222324252627",
|
||
|
|
"",
|
||
|
|
"C5CD9D1850C141E358649994EE701B68"
|
||
|
|
),
|
||
|
|
(
|
||
|
|
"BBAA9988776655443322110F",
|
||
|
|
"",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F2021222324252627",
|
||
|
|
"4412923493C57D5DE0D700F753CCE0D1D2D95060122E9F15"
|
||
|
|
"A5DDBFC5787E50B5CC55EE507BCB084E479AD363AC366B95"
|
||
|
|
"A98CA5F3000B1479"
|
||
|
|
)
|
||
|
|
)
|
||
|
|
|
||
|
|
# Tuple with
|
||
|
|
# - key
|
||
|
|
# - nonce
|
||
|
|
# - authenticated data
|
||
|
|
# - plaintext
|
||
|
|
# - ciphertext and 12 byte MAC tag
|
||
|
|
tv2 = (
|
||
|
|
"0F0E0D0C0B0A09080706050403020100",
|
||
|
|
"BBAA9988776655443322110D",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F2021222324252627",
|
||
|
|
"000102030405060708090A0B0C0D0E0F1011121314151617"
|
||
|
|
"18191A1B1C1D1E1F2021222324252627",
|
||
|
|
"1792A4E31E0755FB03E31B22116E6C2DDF9EFD6E33D536F1"
|
||
|
|
"A0124B0A55BAE884ED93481529C76B6AD0C515F4D1CDD4FD"
|
||
|
|
"AC4F02AA"
|
||
|
|
)
|
||
|
|
|
||
|
|
# Tuple with
|
||
|
|
# - key length
|
||
|
|
# - MAC tag length
|
||
|
|
# - Expected output
|
||
|
|
tv3 = (
|
||
|
|
(128, 128, "67E944D23256C5E0B6C61FA22FDF1EA2"),
|
||
|
|
(192, 128, "F673F2C3E7174AAE7BAE986CA9F29E17"),
|
||
|
|
(256, 128, "D90EB8E9C977C88B79DD793D7FFA161C"),
|
||
|
|
(128, 96, "77A3D8E73589158D25D01209"),
|
||
|
|
(192, 96, "05D56EAD2752C86BE6932C5E"),
|
||
|
|
(256, 96, "5458359AC23B0CBA9E6330DD"),
|
||
|
|
(128, 64, "192C9B7BD90BA06A"),
|
||
|
|
(192, 64, "0066BC6E0EF34E24"),
|
||
|
|
(256, 64, "7D4EA5D445501CBE"),
|
||
|
|
)
|
||
|
|
|
||
|
|
def test1(self):
|
||
|
|
key = unhexlify(b(self.tv1_key))
|
||
|
|
for tv in self.tv1:
|
||
|
|
nonce, aad, pt, ct = [ unhexlify(b(x)) for x in tv ]
|
||
|
|
ct, mac_tag = ct[:-16], ct[-16:]
|
||
|
|
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=nonce)
|
||
|
|
cipher.update(aad)
|
||
|
|
ct2 = cipher.encrypt(pt) + cipher.encrypt()
|
||
|
|
self.assertEqual(ct, ct2)
|
||
|
|
self.assertEqual(mac_tag, cipher.digest())
|
||
|
|
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=nonce)
|
||
|
|
cipher.update(aad)
|
||
|
|
pt2 = cipher.decrypt(ct) + cipher.decrypt()
|
||
|
|
self.assertEqual(pt, pt2)
|
||
|
|
cipher.verify(mac_tag)
|
||
|
|
|
||
|
|
def test2(self):
|
||
|
|
|
||
|
|
key, nonce, aad, pt, ct = [ unhexlify(b(x)) for x in self.tv2 ]
|
||
|
|
ct, mac_tag = ct[:-12], ct[-12:]
|
||
|
|
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=nonce, mac_len=12)
|
||
|
|
cipher.update(aad)
|
||
|
|
ct2 = cipher.encrypt(pt) + cipher.encrypt()
|
||
|
|
self.assertEqual(ct, ct2)
|
||
|
|
self.assertEqual(mac_tag, cipher.digest())
|
||
|
|
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=nonce, mac_len=12)
|
||
|
|
cipher.update(aad)
|
||
|
|
pt2 = cipher.decrypt(ct) + cipher.decrypt()
|
||
|
|
self.assertEqual(pt, pt2)
|
||
|
|
cipher.verify(mac_tag)
|
||
|
|
|
||
|
|
def test3(self):
|
||
|
|
|
||
|
|
for keylen, taglen, result in self.tv3:
|
||
|
|
|
||
|
|
key = bchr(0) * (keylen // 8 - 1) + bchr(taglen)
|
||
|
|
C = b("")
|
||
|
|
|
||
|
|
for i in range(128):
|
||
|
|
S = bchr(0) * i
|
||
|
|
|
||
|
|
N = long_to_bytes(3 * i + 1, 12)
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=N, mac_len=taglen // 8)
|
||
|
|
cipher.update(S)
|
||
|
|
C += cipher.encrypt(S) + cipher.encrypt() + cipher.digest()
|
||
|
|
|
||
|
|
N = long_to_bytes(3 * i + 2, 12)
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=N, mac_len=taglen // 8)
|
||
|
|
C += cipher.encrypt(S) + cipher.encrypt() + cipher.digest()
|
||
|
|
|
||
|
|
N = long_to_bytes(3 * i + 3, 12)
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=N, mac_len=taglen // 8)
|
||
|
|
cipher.update(S)
|
||
|
|
C += cipher.encrypt() + cipher.digest()
|
||
|
|
|
||
|
|
N = long_to_bytes(385, 12)
|
||
|
|
cipher = AES.new(key, AES.MODE_OCB, nonce=N, mac_len=taglen // 8)
|
||
|
|
cipher.update(C)
|
||
|
|
result2 = cipher.encrypt() + cipher.digest()
|
||
|
|
self.assertEqual(unhexlify(b(result)), result2)
|
||
|
|
|
||
|
|
|
||
|
|
def get_tests(config={}):
|
||
|
|
tests = []
|
||
|
|
tests += list_test_cases(OcbTests)
|
||
|
|
tests += list_test_cases(OcbFSMTests)
|
||
|
|
tests += list_test_cases(OcbRfc7253Test)
|
||
|
|
return tests
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
import unittest
|
||
|
|
suite = lambda: unittest.TestSuite(get_tests())
|
||
|
|
unittest.main(defaultTest='suite')
|