68 lines
2.7 KiB
Python
68 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
|
|
import http.client
|
|
import urllib.request, urllib.error, urllib.parse
|
|
import hashlib
|
|
import logging
|
|
logger = logging.getLogger('oml.ssl_request')
|
|
|
|
class InvalidCertificateException(http.client.HTTPException, urllib.error.URLError):
|
|
def __init__(self, fingerprint, cert, reason):
|
|
http.client.HTTPException.__init__(self)
|
|
self._fingerprint = fingerprint
|
|
self._cert_fingerprint = hashlib.sha1(cert).hexdigest()
|
|
self.reason = reason
|
|
|
|
def __str__(self):
|
|
return ('%s (local) != %s (remote) (%s)\n' %
|
|
(self._fingerprint, self._cert_fingerprint, self.reason))
|
|
|
|
class FingerprintHTTPSConnection(http.client.HTTPSConnection):
|
|
|
|
def __init__(self, host, port=None, fingerprint=None, check_hostname=None, **kwargs):
|
|
self._fingerprint = fingerprint
|
|
if self._fingerprint:
|
|
check_hostname = None
|
|
http.client.HTTPSConnection.__init__(self, host, port,
|
|
check_hostname=check_hostname, **kwargs)
|
|
|
|
def _check_fingerprint(self, cert):
|
|
if len(self._fingerprint) == 40:
|
|
fingerprint = hashlib.sha1(cert).hexdigest()
|
|
elif len(self._fingerprint) == 64:
|
|
fingerprint = hashlib.sha256(cert).hexdigest()
|
|
elif len(self._fingerprint) == 128:
|
|
fingerprint = hashlib.sha512(cert).hexdigest()
|
|
else:
|
|
logging.error('unkown _fingerprint length %s (%s)',
|
|
self._fingerprint, len(self._fingerprint))
|
|
return False
|
|
return fingerprint == self._fingerprint
|
|
|
|
def connect(self):
|
|
http.client.HTTPSConnection.connect(self)
|
|
if self._fingerprint:
|
|
cert = self.sock.getpeercert(binary_form=True)
|
|
if not self._check_fingerprint(cert):
|
|
raise InvalidCertificateException(self._fingerprint, cert,
|
|
'fingerprint mismatch')
|
|
#logger.debug('CIPHER %s VERSION %s', self.sock.cipher(), self.sock.ssl_version)
|
|
|
|
class FingerprintHTTPSHandler(urllib.request.HTTPSHandler):
|
|
|
|
def __init__(self, debuglevel=0, context=None, check_hostname=None, fingerprint=None):
|
|
urllib.request.AbstractHTTPHandler.__init__(self, debuglevel)
|
|
self._context = context
|
|
self._check_hostname = check_hostname
|
|
self._fingerprint = fingerprint
|
|
|
|
def https_open(self, req):
|
|
return self.do_open(FingerprintHTTPSConnection, req,
|
|
context=self._context, check_hostname=self._check_hostname,
|
|
fingerprint=self._fingerprint)
|
|
|
|
def get_opener(fingerprint):
|
|
handler = FingerprintHTTPSHandler(fingerprint=fingerprint)
|
|
opener = urllib.request.build_opener(handler)
|
|
return opener
|