mirror of
https://gitee.com/openharmony/third_party_nghttp2
synced 2024-11-27 18:10:47 +00:00
a4156cded3
With OpenSSL <= 1.0.1, openssl ocsp command still returns exit code 0, even if verification was failed. If that happens certain string is emitted in stderr, so check that string and if exists, treat it as error. This issue was fixed in OpenSSL 1.0.2. At least OpenSSL 1.0.2, openssl ocsp command still returns exit code 0, even if responder returned non-successful status code (e.g., trylater(3)). We are not sure this is intentional or not. To handle this, we again check certain error string in stdout, and if it is found, treat it as error.
254 lines
8.8 KiB
Python
Executable File
254 lines
8.8 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# nghttp2 - HTTP/2 C Library
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# Copyright (c) 2015 Tatsuhiro Tsujikawa
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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# This program was translated from the program originally developed by
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# h2o project (https://github.com/h2o/h2o), written in Perl. It had
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# the following copyright notice:
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# Copyright (c) 2015 DeNA Co., Ltd.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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from __future__ import unicode_literals
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import argparse
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import io
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import os
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import os.path
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import re
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import shutil
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import subprocess
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import sys
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import tempfile
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# make this program work for both Python 3 and Python 2.
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try:
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from urllib.parse import urlparse
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stdout_bwrite = sys.stdout.buffer.write
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except ImportError:
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from urlparse import urlparse
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stdout_bwrite = sys.stdout.write
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def die(msg):
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sys.stderr.write(msg)
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sys.stderr.write('\n')
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sys.exit(255)
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def tempfail(msg):
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sys.stderr.write(msg)
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sys.stderr.write('\n')
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sys.exit(os.EX_TEMPFAIL)
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def run_openssl(args, allow_tempfail=False):
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buf = io.BytesIO()
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try:
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p = subprocess.Popen(args, stdout=subprocess.PIPE)
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except Exception as e:
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die('failed to invoke {}:{}'.format(args, e))
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try:
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while True:
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data = p.stdout.read()
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if len(data) == 0:
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break
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buf.write(data)
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if p.wait() != 0:
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raise Exception('nonzero return code {}'.format(p.returncode))
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return buf.getvalue()
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except Exception as e:
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msg = 'OpenSSL exitted abnormally: {}:{}'.format(args, e)
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tempfail(msg) if allow_tempfail else die(msg)
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def read_file(path):
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with open(path, 'rb') as f:
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return f.read()
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def write_file(path, data):
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with open(path, 'wb') as f:
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f.write(data)
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def detect_openssl_version(cmd):
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return run_openssl([cmd, 'version']).decode('utf-8').strip()
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def extract_ocsp_uri(cmd, cert_fn):
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# obtain ocsp uri
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ocsp_uri = run_openssl(
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[cmd, 'x509', '-in', cert_fn, '-noout',
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'-ocsp_uri']).decode('utf-8').strip()
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if not re.match(r'^https?://', ocsp_uri):
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die('failed to extract ocsp URI from {}'.format(cert_fn))
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return ocsp_uri
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def save_issuer_certificate(issuer_fn, cert_fn):
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# save issuer certificate
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chain = read_file(cert_fn).decode('utf-8')
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m = re.match(
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r'.*?-----END CERTIFICATE-----.*?(-----BEGIN CERTIFICATE-----.*?-----END CERTIFICATE-----)',
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chain, re.DOTALL)
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if not m:
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die('--issuer option was not used, and failed to extract issuer certificate from the certificate')
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write_file(issuer_fn, (m.group(1) + '\n').encode('utf-8'))
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def send_and_receive_ocsp(respder_fn, cmd, cert_fn, issuer_fn, ocsp_uri,
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ocsp_host, openssl_version):
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# obtain response (without verification)
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sys.stderr.write('sending OCSP request to {}\n'.format(ocsp_uri))
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args = [
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cmd, 'ocsp', '-issuer', issuer_fn, '-cert', cert_fn, '-url', ocsp_uri,
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'-noverify', '-respout', respder_fn
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]
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ver = openssl_version.lower()
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if ver.startswith('openssl 1.') or ver.startswith('libressl '):
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args.extend(['-header', 'Host', ocsp_host])
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resp = run_openssl(args, allow_tempfail=True)
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return resp.decode('utf-8')
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def verify_response(cmd, tempdir, issuer_fn, respder_fn):
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# verify the response
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sys.stderr.write('verifying the response signature\n')
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verify_fn = os.path.join(tempdir, 'verify.out')
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# try from exotic options
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allextra = [
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# for comodo
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['-VAfile', issuer_fn],
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# these options are only available in OpenSSL >= 1.0.2
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['-partial_chain', '-trusted_first', '-CAfile', issuer_fn],
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# for OpenSSL <= 1.0.1
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['-CAfile', issuer_fn],
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]
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for extra in allextra:
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with open(verify_fn, 'w+b') as f:
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args = [cmd, 'ocsp', '-respin', respder_fn]
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args.extend(extra)
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p = subprocess.Popen(args, stdout=f, stderr=f)
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if p.wait() == 0:
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# OpenSSL <= 1.0.1, openssl ocsp still returns exit
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# code 0 even if verification was failed. So check
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# the error message in stderr output.
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f.seek(0)
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if f.read().decode('utf-8').find(
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'Response Verify Failure') != -1:
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continue
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sys.stderr.write('verify OK (used: {})\n'.format(extra))
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return True
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sys.stderr.write(read_file(verify_fn).decode('utf-8'))
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return False
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def fetch_ocsp_response(cmd, cert_fn, tempdir, issuer_fn=None):
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openssl_version = detect_openssl_version(cmd)
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sys.stderr.write(
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'fetch-ocsp-response (using {})\n'.format(openssl_version))
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ocsp_uri = extract_ocsp_uri(cmd, cert_fn)
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ocsp_host = urlparse(ocsp_uri).netloc
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if not issuer_fn:
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issuer_fn = os.path.join(tempdir, 'issuer.crt')
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save_issuer_certificate(issuer_fn, cert_fn)
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respder_fn = os.path.join(tempdir, 'resp.der')
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resp = send_and_receive_ocsp(
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respder_fn, cmd, cert_fn, issuer_fn, ocsp_uri, ocsp_host,
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openssl_version)
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sys.stderr.write('{}\n'.format(resp))
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# OpenSSL 1.0.2 still returns exit code 0 even if ocsp responder
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# returned error status (e.g., trylater(3))
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if resp.find('Responder Error:') != -1:
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raise Exception('responder returned error')
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if not verify_response(cmd, tempdir, issuer_fn, respder_fn):
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tempfail('failed to verify the response')
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# success
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res = read_file(respder_fn)
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stdout_bwrite(res)
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(
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description=
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'''The command issues an OCSP request for given server certificate, verifies the response and prints the resulting DER.''',
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epilog=
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'''The command exits 0 if successful, or 75 (EX_TEMPFAIL) on temporary error. Other exit codes may be returned in case of hard errors.''')
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parser.add_argument(
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'--issuer',
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metavar='FILE',
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help=
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'issuer certificate (if omitted, is extracted from the certificate chain)')
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parser.add_argument('--openssl',
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metavar='CMD',
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help='openssl command to use (default: "openssl")',
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default='openssl')
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parser.add_argument('certificate',
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help='path to certificate file to validate')
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args = parser.parse_args()
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tempdir = None
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try:
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# Python3.2 has tempfile.TemporaryDirectory, which has nice
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# feature to delete its tree by cleanup() function. We have
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# to support Python2.7, so we have to do this manually.
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tempdir = tempfile.mkdtemp()
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fetch_ocsp_response(args.openssl, args.certificate, tempdir,
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args.issuer)
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finally:
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if tempdir:
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shutil.rmtree(tempdir)
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