From bdda99c0c10b0906849f2c53f28e53ef10829f7a Mon Sep 17 00:00:00 2001
From: Kenneth Reitz <me@kennethreitz.com>
Date: Tue, 27 Dec 2011 23:14:54 -0500
Subject: [PATCH] urllib3 update

---
 requests/packages/urllib3/connectionpool.py   |  8 ++-
 .../packages/urllib3/packages/__init__.py     |  4 ++
 .../packages/ssl_match_hostname/__init__.py   | 61 +++++++++++++++++++
 3 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 requests/packages/urllib3/packages/__init__.py
 create mode 100644 requests/packages/urllib3/packages/ssl_match_hostname/__init__.py

diff --git a/requests/packages/urllib3/connectionpool.py b/requests/packages/urllib3/connectionpool.py
index be9b7fe..c1ebed4 100644
--- a/requests/packages/urllib3/connectionpool.py
+++ b/requests/packages/urllib3/connectionpool.py
@@ -13,6 +13,7 @@ from Queue import Queue, Empty, Full
 from select import select
 from socket import error as SocketError, timeout as SocketTimeout
 
+from .packages.ssl_match_hostname import match_hostname, CertificateError
 
 try:
     import ssl
@@ -70,7 +71,8 @@ class VerifiedHTTPSConnection(HTTPSConnection):
         self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file,
                                     cert_reqs=self.cert_reqs,
                                     ca_certs=self.ca_certs)
-
+        if self.ca_certs:
+            match_hostname(self.sock.getpeercert(), self.host)
 
 ## Pool objects
 
@@ -364,6 +366,10 @@ class HTTPConnectionPool(ConnectionPool, RequestMethods):
             # SSL certificate error
             raise SSLError(e)
 
+        except (CertificateError), e:
+            # Name mismatch
+            raise SSLError(e)
+            
         except (HTTPException, SocketError), e:
             # Connection broken, discard. It will be replaced next _get_conn().
             conn = None
diff --git a/requests/packages/urllib3/packages/__init__.py b/requests/packages/urllib3/packages/__init__.py
new file mode 100644
index 0000000..37e8351
--- /dev/null
+++ b/requests/packages/urllib3/packages/__init__.py
@@ -0,0 +1,4 @@
+from __future__ import absolute_import
+
+from . import ssl_match_hostname
+
diff --git a/requests/packages/urllib3/packages/ssl_match_hostname/__init__.py b/requests/packages/urllib3/packages/ssl_match_hostname/__init__.py
new file mode 100644
index 0000000..9560b04
--- /dev/null
+++ b/requests/packages/urllib3/packages/ssl_match_hostname/__init__.py
@@ -0,0 +1,61 @@
+"""The match_hostname() function from Python 3.2, essential when using SSL."""
+
+import re
+
+__version__ = '3.2.2'
+
+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")
-- 
2.34.1