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-rw-r--r--src/leap/common/certs.py17
-rw-r--r--src/leap/common/http.py82
-rw-r--r--src/leap/common/tests/test_http.py62
3 files changed, 106 insertions, 55 deletions
diff --git a/src/leap/common/certs.py b/src/leap/common/certs.py
index db513f6..c8e0743 100644
--- a/src/leap/common/certs.py
+++ b/src/leap/common/certs.py
@@ -178,3 +178,20 @@ def should_redownload(certfile, now=time.gmtime):
return True
return False
+
+
+def get_compatible_ssl_context_factory(cert_path=None):
+ import twisted
+ cert = None
+ if twisted.version.base() > '14.0.1':
+ from twisted.web.client import BrowserLikePolicyForHTTPS
+ from twisted.internet import ssl
+ if cert_path:
+ cert = ssl.Certificate.loadPEM(open(cert_path).read())
+ policy = BrowserLikePolicyForHTTPS(cert)
+ return policy
+ else:
+ raise Exception(("""
+ Twisted 14.0.2 is needed in order to have secure Client Web SSL Contexts, not %s
+ See: http://twistedmatrix.com/trac/ticket/7647
+ """) % (twisted.version.base()))
diff --git a/src/leap/common/http.py b/src/leap/common/http.py
index 39f01ba..1e384e5 100644
--- a/src/leap/common/http.py
+++ b/src/leap/common/http.py
@@ -18,33 +18,47 @@
Twisted HTTP/HTTPS client.
"""
-import os
+try:
+ import twisted
+except ImportError:
+ print "*******"
+ print "Twisted is needed to use leap.common.http module"
+ print ""
+ print "Install the extra requirement of the package:"
+ print "$ pip install leap.common[Twisted]"
+ import sys
+ sys.exit(1)
-from zope.interface import implements
-from OpenSSL.crypto import load_certificate
-from OpenSSL.crypto import FILETYPE_PEM
+from leap.common.certs import get_compatible_ssl_context_factory
+
+from zope.interface import implements
from twisted.internet import reactor
-from twisted.internet.ssl import ClientContextFactory
-from twisted.internet.ssl import CertificateOptions
from twisted.internet.defer import succeed
from twisted.web.client import Agent
from twisted.web.client import HTTPConnectionPool
from twisted.web.client import readBody
-from twisted.web.client import BrowserLikePolicyForHTTPS
from twisted.web.http_headers import Headers
from twisted.web.iweb import IBodyProducer
+def createPool(maxPersistentPerHost=10, persistent=True):
+ pool = HTTPConnectionPool(reactor, persistent)
+ pool.maxPersistentPerHost = maxPersistentPerHost
+ return pool
+
+_pool = createPool()
+
+
class HTTPClient(object):
"""
HTTP client done the twisted way, with a main focus on pinning the SSL
certificate.
"""
- def __init__(self, cert_file=None):
+ def __init__(self, cert_file=None, pool=_pool):
"""
Init the HTTP client
@@ -52,36 +66,13 @@ class HTTPClient(object):
system's CAs will be used.
:type cert_file: str
"""
- self._pool = HTTPConnectionPool(reactor, persistent=True)
- self._pool.maxPersistentPerHost = 10
-
- if cert_file:
- cert = self._load_cert(cert_file)
- self._agent = Agent(
- reactor,
- HTTPClient.ClientContextFactory(cert),
- pool=self._pool)
- else:
- # trust the system's CAs
- self._agent = Agent(
- reactor,
- BrowserLikePolicyForHTTPS(),
- pool=self._pool)
-
- def _load_cert(self, cert_file):
- """
- Load a X509 certificate from a file.
- :param cert_file: The path to the certificate file.
- :type cert_file: str
+ policy = get_compatible_ssl_context_factory(cert_file)
- :return: The X509 certificate.
- :rtype: OpenSSL.crypto.X509
- """
- if os.path.exists(cert_file):
- with open(cert_file) as f:
- data = f.read()
- return load_certificate(FILETYPE_PEM, data)
+ self._agent = Agent(
+ reactor,
+ policy,
+ pool=pool)
def request(self, url, method='GET', body=None, headers={}):
"""
@@ -106,25 +97,6 @@ class HTTPClient(object):
d.addCallback(readBody)
return d
- class ClientContextFactory(ClientContextFactory):
- """
- A context factory that will verify the server's certificate against a
- given CA certificate.
- """
-
- def __init__(self, cacert):
- """
- Initialize the context factory.
-
- :param cacert: The CA certificate.
- :type cacert: OpenSSL.crypto.X509
- """
- self._cacert = cacert
-
- def getContext(self, hostname, port):
- opts = CertificateOptions(verify=True, caCerts=[self._cacert])
- return opts.getContext()
-
class StringBodyProducer(object):
"""
A producer that writes the body of a request to a consumer.
diff --git a/src/leap/common/tests/test_http.py b/src/leap/common/tests/test_http.py
new file mode 100644
index 0000000..e240ca3
--- /dev/null
+++ b/src/leap/common/tests/test_http.py
@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+# test_http.py
+# Copyright (C) 2013 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+"""
+Tests for:
+ * leap/common/http.py
+"""
+import os
+try:
+ import unittest2 as unittest
+except ImportError:
+ import unittest
+
+from leap.common import http
+from leap.common.testing.basetest import BaseLeapTest
+
+TEST_CERT_PEM = os.path.join(
+ os.path.split(__file__)[0],
+ '..', 'testing', "leaptest_combined_keycert.pem")
+
+
+class HTTPClientTest(BaseLeapTest):
+
+ def setUp(self):
+ pass
+
+ def tearDown(self):
+ pass
+
+ def test_agents_sharing_pool_by_default(self):
+ client = http.HTTPClient()
+ client2 = http.HTTPClient(TEST_CERT_PEM)
+ self.assertNotEquals(client._agent, client2._agent, "Expected dedicated agents")
+ self.assertEquals(client._agent._pool, client2._agent._pool, "Pool was not reused by default")
+
+ def test_agent_can_have_dedicated_custom_pool(self):
+ custom_pool = http.createPool(maxPersistentPerHost=42, persistent=False)
+ self.assertEquals(custom_pool.maxPersistentPerHost, 42,
+ "Custom persistent connections limit is not being respected")
+ self.assertFalse(custom_pool.persistent,
+ "Custom persistence is not being respected")
+ default_client = http.HTTPClient()
+ custom_client = http.HTTPClient(pool=custom_pool)
+
+ self.assertNotEquals(default_client._agent, custom_client._agent, "No agent reuse is expected")
+ self.assertEquals(custom_pool, custom_client._agent._pool, "Custom pool usage was not respected")
+
+if __name__ == "__main__":
+ unittest.main()