--- a/setuptools/ssl_support.py.orig 2013-09-18 08:16:26.613869055 +0200
+++ b/setuptools/ssl_support.py 2013-09-18 08:17:44.081722399 +0200
@@ -82,71 +82,7 @@
raise error("getaddrinfo returns an empty list")
-try:
- from ssl import CertificateError, match_hostname
-except ImportError:
- class CertificateError(ValueError):
- pass
-
- def _dnsname_to_pat(dn, max_wildcards=1):
- pats = []
- for frag in dn.split(r'.'):
- if frag.count('*') > max_wildcards:
- # Issue #17980: avoid denials of service by refusing more
- # than one wildcard per fragment. A survery of established
- # policy among SSL implementations showed it to be a
- # reasonable choice.
- raise CertificateError(
- "too many wildcards in certificate DNS name: " + repr(dn))
- 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")
+from backports.ssl_match_hostname import CertificateError, match_hostname