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from chargebee.main import Environment
import re
import sys
import socket
try:
import simplejson as json
except ImportError:
import json
py_major_v = sys.version_info[0]
py_minor_v = sys.version_info[1]
if py_major_v < 3:
from urllib import urlencode
from urlparse import urlparse
from urllib2 import urlopen as _urlopen, Request
elif py_major_v >= 3:
from urllib.parse import urlencode, urlparse
from urllib.request import urlopen as _urlopen, Request
try:
SSLError = None
ssl = None
if Environment.chargebee_domain is None:
HTTPSConnection = object
else:
HTTPConnection = object
if py_major_v < 3:
from httplib import HTTPConnection, HTTPSConnection, HTTPException
else:
from http.client import HTTPConnection, HTTPSConnection, HTTPException
import ssl
SSLError = ssl.SSLError
except (ImportError, AttributeError): # Platform-specific: No SSL
pass
class VerifiedHTTPSConnection(HTTPSConnection):
"""Based on httplib.HTTPSConnection but wraps socket with SSL certification"""
def set_cert(self, ca_certs, cert_reqs='CERT_REQUIRED'):
ssl_req_scheme = {
'CERT_NONE': ssl.CERT_NONE,
'CERT_OPTIONAL': ssl.CERT_OPTIONAL,
'CERT_REQUIRED': ssl.CERT_REQUIRED
}
self.cert_reqs = ssl_req_scheme.get(cert_reqs) or ssl.CERT_NONE
self.ca_certs = ca_certs
def connect(self):
# Add certificate verification
sock = socket.create_connection((self.host, self.port), self.timeout)
# Wrap socket using verification with the root certs in
# trusted_root_certs
self.sock = ssl.wrap_socket(sock, cert_reqs=self.cert_reqs, ca_certs=self.ca_certs)
if self.ca_certs:
match_hostname(self.sock.getpeercert(), self.host)
class CertificateError(ValueError):
pass
def _dnsname_to_pat(dn):
pats = []
for frag in dn.split(r'.'):
if frag == '*':
# When '*' is a fragment by itself, it matches a non-empty dotless
# fragment.
pats.append('[^.]+')
else:
# Otherwise, '*' matches any dotless fragment.
frag = re.escape(frag)
pats.append(frag.replace(r'\*', '[^.]*'))
return re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
def match_hostname(cert, hostname):
"""Verify that *cert* (in decoded format as returned by
SSLSocket.getpeercert()) matches the *hostname*. RFC 2818 rules
are mostly followed, but IP addresses are not accepted for *hostname*.
CertificateError is raised on failure. On success, the function
returns nothing.
"""
if not cert:
raise ValueError("empty or no certificate")
dnsnames = []
san = cert.get('subjectAltName', ())
for key, value in san:
if key == 'DNS':
if _dnsname_to_pat(value).match(hostname):
return
dnsnames.append(value)
if not dnsnames:
# The subject is only checked when there is no dNSName entry
# in subjectAltName
for sub in cert.get('subject', ()):
for key, value in sub:
# XXX according to RFC 2818, the most specific Common Name
# must be used.
if key == 'commonName':
if _dnsname_to_pat(value).match(hostname):
return
dnsnames.append(value)
if len(dnsnames) > 1:
raise CertificateError("hostname %r "
"doesn't match either of %s"
% (hostname, ', '.join(map(repr, dnsnames))))
elif len(dnsnames) == 1:
raise CertificateError("hostname %r "
"doesn't match %r"
% (hostname, dnsnames[0]))
else:
raise CertificateError("no appropriate commonName or "
"subjectAltName fields were found")
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