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Diffstat (limited to 'lib/Crypto/SelfTest/loader.py')
| -rw-r--r-- | lib/Crypto/SelfTest/loader.py | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/lib/Crypto/SelfTest/loader.py b/lib/Crypto/SelfTest/loader.py new file mode 100644 index 0000000..18be270 --- /dev/null +++ b/lib/Crypto/SelfTest/loader.py @@ -0,0 +1,206 @@ +# =================================================================== +# +# 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 + + This function returns 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. + """ + + 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 + |