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# =================================================================== # # Copyright (c) 2016, 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 json import errno import binascii import warnings from binascii import unhexlify from Crypto.Util.py3compat import FileNotFoundError try: import pycryptodome_test_vectors # type: ignore test_vectors_available = True except ImportError: test_vectors_available = False def _load_tests(dir_comps, file_in, description, conversions): """Load and parse a test vector file Return a list of objects, one per group of adjacent KV lines or for a single line in the form "[.*]". For a group of lines, the object has one attribute per line. """ line_number = 0 results = [] class TestVector(object): def __init__(self, description, count): self.desc = description self.count = count self.others = [] test_vector = None count = 0 new_group = True while True: line_number += 1 line = file_in.readline() if not line: if test_vector is not None: results.append(test_vector) break line = line.strip() # Skip comments and empty lines if line.startswith('#') or not line: new_group = True continue if line.startswith("["): if test_vector is not None: results.append(test_vector) test_vector = None results.append(line) continue if new_group: count += 1 new_group = False if test_vector is not None: results.append(test_vector) test_vector = TestVector("%s (#%d)" % (description, count), count) res = re.match("([A-Za-z0-9]+) = ?(.*)", line) if not res: test_vector.others += [line] else: token = res.group(1).lower() data = res.group(2).lower() conversion = conversions.get(token, None) if conversion is None: if len(data) % 2 != 0: data = "0" + data setattr(test_vector, token, binascii.unhexlify(data)) else: setattr(test_vector, token, conversion(data)) # This line is ignored return results def load_test_vectors(dir_comps, file_name, description, conversions): """Load and parse a test vector file, formatted using the NIST style. Args: dir_comps (list of strings): The path components under the ``pycryptodome_test_vectors`` package. For instance ``("Cipher", "AES")``. file_name (string): The name of the file with the test vectors. description (string): A description applicable to the test vectors in the file. conversions (dictionary): The dictionary contains functions. Values in the file that have an entry in this dictionary will be converted usign the matching function. Otherwise, values will be considered as hexadecimal and converted to binary. Returns: A list of test vector objects. The file is formatted in the following way: - Lines starting with "#" are comments and will be ignored. - Each test vector is a sequence of 1 or more adjacent lines, where each lines is an assignement. - Test vectors are separated by an empty line, a comment, or a line starting with "[". A test vector object has the following attributes: - desc (string): description - counter (int): the order of the test vector in the file (from 1) - others (list): zero or more lines of the test vector that were not assignments - left-hand side of each assignment (lowercase): the value of the assignement, either converted or bytes. """ results = None try: if not test_vectors_available: raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), file_name) description = "%s test (%s)" % (description, file_name) init_dir = os.path.dirname(pycryptodome_test_vectors.__file__) full_file_name = os.path.join(os.path.join(init_dir, *dir_comps), file_name) with open(full_file_name) as file_in: results = _load_tests(dir_comps, file_in, description, conversions) except FileNotFoundError: warnings.warn("Warning: skipping extended tests for " + description, UserWarning, stacklevel=2) return results def load_test_vectors_wycheproof(dir_comps, file_name, description, root_tag={}, group_tag={}, unit_tag={}): result = [] try: if not test_vectors_available: raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), file_name) init_dir = os.path.dirname(pycryptodome_test_vectors.__file__) full_file_name = os.path.join(os.path.join(init_dir, *dir_comps), file_name) with open(full_file_name) as file_in: tv_tree = json.load(file_in) except FileNotFoundError: warnings.warn("Warning: skipping extended tests for " + description, UserWarning, stacklevel=2) return result class TestVector(object): pass common_root = {} for k, v in root_tag.items(): common_root[k] = v(tv_tree) for group in tv_tree['testGroups']: common_group = {} for k, v in group_tag.items(): common_group[k] = v(group) for test in group['tests']: tv = TestVector() for k, v in common_root.items(): setattr(tv, k, v) for k, v in common_group.items(): setattr(tv, k, v) tv.id = test['tcId'] tv.comment = test['comment'] for attr in 'key', 'iv', 'aad', 'msg', 'ct', 'tag', 'label', 'ikm', 'salt', 'info', 'okm', 'sig': if attr in test: setattr(tv, attr, unhexlify(test[attr])) tv.filename = file_name for k, v in unit_tag.items(): setattr(tv, k, v(test)) tv.valid = test['result'] != "invalid" tv.warning = test['result'] == "acceptable" result.append(tv) return result
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