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#
# Override a slew of methods to have more control over SSL
import socket
import requests
import urlparse
import logging
import socket
from requests.packages.urllib3.util import get_host
from requests.packages.urllib3.util.timeout import Timeout
from requests.packages.urllib3.contrib import pyopenssl
from requests.packages.urllib3.connectionpool import HTTPConnectionPool, HTTPSConnectionPool, VerifiedHTTPSConnection
# Don't bend over backwards for ssl support, assume it is there.
import ssl
try: # Python 3
from http.client import HTTPConnection, HTTPException
from http.client import HTTP_PORT, HTTPS_PORT
from http.client import HTTPSConnection
except ImportError:
from httplib import HTTPConnection, HTTPException
from httplib import HTTP_PORT, HTTPS_PORT
from httplib import HTTPSConnection
try:
# python3.2+
from ssl import match_hostname, CertificateError
except ImportError:
try:
# Older python where the backport from pypi is installed
from backports.ssl_match_hostname import match_hostname, CertificateError
except ImportError:
# Other older python we use the urllib3 bundled copy
from urllib3.packages.ssl_match_hostname import match_hostname, CertificateError
SAVE_DEFAULT_SSL_CIPHER_LIST = pyopenssl.DEFAULT_SSL_CIPHER_LIST
log = logging.getLogger(__name__)
def connection_from_url(url, **kw):
"""
Given a url, return an :class:`.ConnectionPool` instance of its host.
This is a shortcut for not having to parse out the scheme, host, and port
of the url before creating an :class:`.ConnectionPool` instance.
:param url:
Absolute URL string that must include the scheme. Port is optional.
:param \**kw:
Passes additional parameters to the constructor of the appropriate
:class:`.ConnectionPool`. Useful for specifying things like
timeout, maxsize, headers, etc.
Example: ::
>>> conn = connection_from_url('http://google.com/')
>>> r = conn.request('GET', '/')
"""
scheme, host, port = get_host(url)
if scheme == 'https':
return MyHTTPSConnectionPool(host, port=port, **kw)
else:
return HTTPConnectionPool(host, port=port, **kw)
class MyHTTPSConnectionPool(HTTPSConnectionPool):
def __init__(self, host, port=None,
strict=False, timeout=Timeout.DEFAULT_TIMEOUT, maxsize=1,
block=False, headers=None,
key_file=None, cert_file=None,
cert_reqs='CERT_REQUIRED', ca_certs='/etc/ssl/certs/ca-certificates.crt', ssl_version=ssl.PROTOCOL_SSLv23, ciphers=None):
super(HTTPSConnectionPool, self).__init__(host, port,
strict, timeout, maxsize,
block, headers)
self.key_file = key_file
self.cert_file = cert_file
self.cert_reqs = cert_reqs
self.ca_certs = ca_certs
self.ssl_version = ssl_version
self.ciphers = ciphers
self.assert_hostname = None
self.assert_fingerprint = None
def _new_conn(self):
"""
Return a fresh :class:`httplib.HTTPSConnection`.
"""
self.num_connections += 1
log.info("Starting new HTTPS connection (%d): %s"
% (self.num_connections, self.host))
#if not ssl: # Platform-specific: Python compiled without +ssl
# if not HTTPSConnection or HTTPSConnection is object:
# raise SSLError("Can't connect to HTTPS URL because the SSL "
# "module is not available.")
# return HTTPSConnection(host=self.host, port=self.port)
connection = MyVerifiedHTTPSConnection(host=self.host, port=self.port)
connection.sni = self.sni
connection.set_cert(key_file=self.key_file, cert_file=self.cert_file,
cert_reqs=self.cert_reqs, ca_certs=self.ca_certs)
connection.set_ssl_version(self.ssl_version)
connection.set_ciphers(self.ciphers)
return connection
class MyVerifiedHTTPSConnection(VerifiedHTTPSConnection):
"""
Based on httplib.HTTPSConnection but wraps the socket with
SSL certification.
"""
cert_reqs = None
ca_certs = None
client_cipher = None
is_verified = True # squelch warning
sni = False
assert_hostname = None
assert_fingerprint = None
def set_cert(self, key_file=None, cert_file=None,
cert_reqs='CERT_NONE', ca_certs=None):
ssl_req_scheme = {
'CERT_NONE': ssl.CERT_NONE,
'CERT_OPTIONAL': ssl.CERT_OPTIONAL,
'CERT_REQUIRED': ssl.CERT_REQUIRED
}
self.key_file = key_file
self.cert_file = cert_file
self.cert_reqs = ssl_req_scheme.get(cert_reqs) or ssl.CERT_NONE
self.ca_certs = ca_certs
def set_ssl_version(self, ssl_version=ssl.PROTOCOL_SSLv23):
self.ssl_version = ssl_version
def set_ciphers(self, ciphers=None):
self.ciphers = ciphers
def connect(self):
if self.sni:
if self.ciphers:
pyopenssl.DEFAULT_SSL_CIPHER_LIST = self.ciphers
else:
pyopenssl.DEFAULT_SSL_CIPHER_LIST = SAVE_DEFAULT_SSL_CIPHER_LIST
return super(MyVerifiedHTTPSConnection, self).connect()
# 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, self.key_file, self.cert_file,
cert_reqs=self.cert_reqs,
ca_certs=self.ca_certs,
ssl_version=self.ssl_version,
ciphers=self.ciphers)
if self.ca_certs:
match_hostname(self.sock.getpeercert(), self.host)
def close(self):
if not self.sni:
if self.sock:
self.client_cipher = self.sock.cipher()
super(MyVerifiedHTTPSConnection, self).close()
class MyAdapter(requests.adapters.HTTPAdapter):
def get_connection(self, url, proxies=None):
"""Returns a connection for the given URL."""
# proxies are not supported
return connection_from_url(url)
def cert_verify(self, conn, url, verify, cert):
# I'm overloading the content of verify since this API is so
# braindead. If verify is a dict then key 'verify' represents the
# original meaning, the other keys are my own.
if isinstance(verify, bool):
super(MyAdapter, self).cert_verify(conn, url, verify, cert)
elif isinstance(verify, dict):
if 'verify' in verify:
super(MyAdapter, self).cert_verify(conn, url,
verify['verify'], cert)
if 'ssl_version' in verify:
conn.ssl_version = verify['ssl_version']
if 'ciphers' in verify:
conn.ciphers = verify['ciphers']
if 'cert_file' in verify:
conn.cert_file = verify['cert_file']
if 'key_file' in verify:
conn.key_file = verify['key_file']
conn.sni = verify.get('sni', False)
else: # huh? Do nothing
pass
"""
s = requests.Session()
s.mount('https://', MyAdapter())
try:
r = s.get('https://test.example.com:8000/', verify={'verify': False, 'ssl_version': ssl.PROTOCOL_SSLv23, 'ciphers': 'HIGH'})
cipher = r.raw._pool._get_conn().client_cipher
except requests.exceptions.SSLError, e:
print e.message
else:
print r.status_code
print cipher
#request = requests.get('https://test.example.com:8000/', verify=False)
#print request.status_code
"""
|
