mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2025-03-29 22:20:30 +00:00
cert_audit: Initial script for auditing expiry date
We introduce the script to audit the expiry date of X509 files (i.e. crt/crl/csr files) in tests/data_files/ folder. This commit add basic classes and the framework for auditing and "-a" option to list all valid crt/crl/csr files it found. Signed-off-by: Pengyu Lv <pengyu.lv@arm.com>
This commit is contained in:
Pengyu Lv
parent
0f5086847c
commit
7f6933a227
282
tests/scripts/audit-validity-dates.py
Executable file
282
tests/scripts/audit-validity-dates.py
Executable file
@ -0,0 +1,282 @@
|
||||
#!/usr/bin/env python3
|
||||
#
|
||||
# copyright the mbed tls contributors
|
||||
# spdx-license-identifier: apache-2.0
|
||||
#
|
||||
# licensed under the apache license, version 2.0 (the "license"); you may
|
||||
# not use this file except in compliance with the license.
|
||||
# you may obtain a copy of the license at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
"""Audit validity date of X509 crt/crl/csr
|
||||
|
||||
This script is used to audit the validity date of crt/crl/csr used for testing.
|
||||
The files are in tests/data_files/ while some data are in test suites data in
|
||||
tests/suites/*.data files.
|
||||
"""
|
||||
|
||||
import os
|
||||
import sys
|
||||
import re
|
||||
import typing
|
||||
import types
|
||||
import argparse
|
||||
import datetime
|
||||
from enum import Enum
|
||||
|
||||
from cryptography import x509
|
||||
|
||||
class DataType(Enum):
|
||||
CRT = 1 # Certificate
|
||||
CRL = 2 # Certificate Revocation List
|
||||
CSR = 3 # Certificate Signing Request
|
||||
|
||||
class DataFormat(Enum):
|
||||
PEM = 1 # Privacy-Enhanced Mail
|
||||
DER = 2 # Distinguished Encoding Rules
|
||||
|
||||
class AuditData:
|
||||
"""Store file, type and expiration date for audit."""
|
||||
#pylint: disable=too-few-public-methods
|
||||
def __init__(self, data_type: DataType):
|
||||
self.data_type = data_type
|
||||
self.filename = ""
|
||||
self.not_valid_after: datetime.datetime
|
||||
self.not_valid_before: datetime.datetime
|
||||
|
||||
def fill_validity_duration(self, x509_obj):
|
||||
"""Fill expiration_date field from a x509 object"""
|
||||
# Certificate expires after "not_valid_after"
|
||||
# Certificate is invalid before "not_valid_before"
|
||||
if self.data_type == DataType.CRT:
|
||||
self.not_valid_after = x509_obj.not_valid_after
|
||||
self.not_valid_before = x509_obj.not_valid_before
|
||||
# CertificateRevocationList expires after "next_update"
|
||||
# CertificateRevocationList is invalid before "last_update"
|
||||
elif self.data_type == DataType.CRL:
|
||||
self.not_valid_after = x509_obj.next_update
|
||||
self.not_valid_before = x509_obj.last_update
|
||||
# CertificateSigningRequest is always valid.
|
||||
elif self.data_type == DataType.CSR:
|
||||
self.not_valid_after = datetime.datetime.max
|
||||
self.not_valid_before = datetime.datetime.min
|
||||
else:
|
||||
raise ValueError("Unsupported file_type: {}".format(self.data_type))
|
||||
|
||||
class X509Parser():
|
||||
"""A parser class to parse crt/crl/csr file or data in PEM/DER format."""
|
||||
PEM_REGEX = br'-{5}BEGIN (?P<type>.*?)-{5}\n(?P<data>.*?)-{5}END (?P=type)-{5}\n'
|
||||
PEM_TAG_REGEX = br'-{5}BEGIN (?P<type>.*?)-{5}\n'
|
||||
PEM_TAGS = {
|
||||
DataType.CRT: 'CERTIFICATE',
|
||||
DataType.CRL: 'X509 CRL',
|
||||
DataType.CSR: 'CERTIFICATE REQUEST'
|
||||
}
|
||||
|
||||
def __init__(self, backends: dict):
|
||||
self.backends = backends
|
||||
self.__generate_parsers()
|
||||
|
||||
def __generate_parser(self, data_type: DataType):
|
||||
"""Parser generator for a specific DataType"""
|
||||
tag = self.PEM_TAGS[data_type]
|
||||
pem_loader = self.backends[data_type][DataFormat.PEM]
|
||||
der_loader = self.backends[data_type][DataFormat.DER]
|
||||
def wrapper(data: bytes):
|
||||
pem_type = X509Parser.pem_data_type(data)
|
||||
# It is in PEM format with target tag
|
||||
if pem_type == tag:
|
||||
return pem_loader(data)
|
||||
# It is in PEM format without target tag
|
||||
if pem_type:
|
||||
return None
|
||||
# It might be in DER format
|
||||
try:
|
||||
result = der_loader(data)
|
||||
except ValueError:
|
||||
result = None
|
||||
return result
|
||||
wrapper.__name__ = "{}.parser[{}]".format(type(self).__name__, tag)
|
||||
return wrapper
|
||||
|
||||
def __generate_parsers(self):
|
||||
"""Generate parsers for all support DataType"""
|
||||
self.parsers = {}
|
||||
for data_type, _ in self.PEM_TAGS.items():
|
||||
self.parsers[data_type] = self.__generate_parser(data_type)
|
||||
|
||||
def __getitem__(self, item):
|
||||
return self.parsers[item]
|
||||
|
||||
@staticmethod
|
||||
def pem_data_type(data: bytes) -> str:
|
||||
"""Get the tag from the data in PEM format
|
||||
|
||||
:param data: data to be checked in binary mode.
|
||||
:return: PEM tag or "" when no tag detected.
|
||||
"""
|
||||
m = re.search(X509Parser.PEM_TAG_REGEX, data)
|
||||
if m is not None:
|
||||
return m.group('type').decode('UTF-8')
|
||||
else:
|
||||
return ""
|
||||
|
||||
class Auditor:
|
||||
"""A base class for audit."""
|
||||
def __init__(self, verbose):
|
||||
self.verbose = verbose
|
||||
self.default_files = []
|
||||
self.audit_data = []
|
||||
self.parser = X509Parser({
|
||||
DataType.CRT: {
|
||||
DataFormat.PEM: x509.load_pem_x509_certificate,
|
||||
DataFormat.DER: x509.load_der_x509_certificate
|
||||
},
|
||||
DataType.CRL: {
|
||||
DataFormat.PEM: x509.load_pem_x509_crl,
|
||||
DataFormat.DER: x509.load_der_x509_crl
|
||||
},
|
||||
DataType.CSR: {
|
||||
DataFormat.PEM: x509.load_pem_x509_csr,
|
||||
DataFormat.DER: x509.load_der_x509_csr
|
||||
},
|
||||
})
|
||||
|
||||
def error(self, *args):
|
||||
#pylint: disable=no-self-use
|
||||
print("Error: ", *args, file=sys.stderr)
|
||||
|
||||
def warn(self, *args):
|
||||
if self.verbose:
|
||||
print("Warn: ", *args, file=sys.stderr)
|
||||
|
||||
def parse_file(self, filename: str) -> typing.List[AuditData]:
|
||||
"""
|
||||
Parse a list of AuditData from file.
|
||||
|
||||
:param filename: name of the file to parse.
|
||||
:return list of AuditData parsed from the file.
|
||||
"""
|
||||
with open(filename, 'rb') as f:
|
||||
data = f.read()
|
||||
result_list = []
|
||||
result = self.parse_bytes(data)
|
||||
if result is not None:
|
||||
result.filename = filename
|
||||
result_list.append(result)
|
||||
return result_list
|
||||
|
||||
def parse_bytes(self, data: bytes):
|
||||
"""Parse AuditData from bytes."""
|
||||
for data_type in list(DataType):
|
||||
try:
|
||||
result = self.parser[data_type](data)
|
||||
except ValueError as val_error:
|
||||
result = None
|
||||
self.warn(val_error)
|
||||
if result is not None:
|
||||
audit_data = AuditData(data_type)
|
||||
audit_data.fill_validity_duration(result)
|
||||
return audit_data
|
||||
return None
|
||||
|
||||
def walk_all(self, file_list):
|
||||
"""
|
||||
Iterate over all the files in the list and get audit data.
|
||||
"""
|
||||
if not file_list:
|
||||
file_list = self.default_files
|
||||
for filename in file_list:
|
||||
data_list = self.parse_file(filename)
|
||||
self.audit_data.extend(data_list)
|
||||
|
||||
def for_each(self, do, *args, **kwargs):
|
||||
"""
|
||||
Sort the audit data and iterate over them.
|
||||
"""
|
||||
if not isinstance(do, types.FunctionType):
|
||||
return
|
||||
for d in self.audit_data:
|
||||
do(d, *args, **kwargs)
|
||||
|
||||
@staticmethod
|
||||
def find_test_dir():
|
||||
"""Get the relative path for the MbedTLS test directory."""
|
||||
if os.path.isdir('tests'):
|
||||
tests_dir = 'tests'
|
||||
elif os.path.isdir('suites'):
|
||||
tests_dir = '.'
|
||||
elif os.path.isdir('../suites'):
|
||||
tests_dir = '..'
|
||||
else:
|
||||
raise Exception("Mbed TLS source tree not found")
|
||||
return tests_dir
|
||||
|
||||
class TestDataAuditor(Auditor):
|
||||
"""Class for auditing files in tests/data_files/"""
|
||||
def __init__(self, verbose):
|
||||
super().__init__(verbose)
|
||||
self.default_files = self.collect_default_files()
|
||||
|
||||
def collect_default_files(self):
|
||||
"""collect all files in tests/data_files/"""
|
||||
test_dir = self.find_test_dir()
|
||||
test_data_folder = os.path.join(test_dir, 'data_files')
|
||||
data_files = []
|
||||
for (dir_path, _, file_names) in os.walk(test_data_folder):
|
||||
data_files.extend(os.path.join(dir_path, file_name)
|
||||
for file_name in file_names)
|
||||
return data_files
|
||||
|
||||
|
||||
def list_all(audit_data: AuditData):
|
||||
print("{}\t{}\t{}\t{}".format(
|
||||
audit_data.not_valid_before.isoformat(timespec='seconds'),
|
||||
audit_data.not_valid_after.isoformat(timespec='seconds'),
|
||||
audit_data.data_type.name,
|
||||
audit_data.filename))
|
||||
|
||||
def main():
|
||||
"""
|
||||
Perform argument parsing.
|
||||
"""
|
||||
parser = argparse.ArgumentParser(
|
||||
description='Audit script for X509 crt/crl/csr files.'
|
||||
)
|
||||
|
||||
parser.add_argument('-a', '--all',
|
||||
action='store_true',
|
||||
help='list the information of all files')
|
||||
parser.add_argument('-v', '--verbose',
|
||||
action='store_true', dest='verbose',
|
||||
help='Show warnings')
|
||||
parser.add_argument('-f', '--file', dest='file',
|
||||
help='file to audit (Debug only)',
|
||||
metavar='FILE')
|
||||
|
||||
args = parser.parse_args()
|
||||
|
||||
# start main routine
|
||||
td_auditor = TestDataAuditor(args.verbose)
|
||||
|
||||
if args.file:
|
||||
data_files = [args.file]
|
||||
else:
|
||||
data_files = td_auditor.default_files
|
||||
|
||||
td_auditor.walk_all(data_files)
|
||||
|
||||
if args.all:
|
||||
td_auditor.for_each(list_all)
|
||||
|
||||
print("\nDone!\n")
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
Loading…
x
Reference in New Issue
Block a user