diff options
Diffstat (limited to 'lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/packages/ssl_match_hostname/_implementation.py')
| -rw-r--r-- | lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/packages/ssl_match_hostname/_implementation.py | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/packages/ssl_match_hostname/_implementation.py b/lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/packages/ssl_match_hostname/_implementation.py deleted file mode 100644 index 1fd42f38..00000000 --- a/lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/packages/ssl_match_hostname/_implementation.py +++ /dev/null @@ -1,157 +0,0 @@ -"""The match_hostname() function from Python 3.3.3, essential when using SSL.""" - -# Note: This file is under the PSF license as the code comes from the python -# stdlib. http://docs.python.org/3/license.html - -import re -import sys - -# ipaddress has been backported to 2.6+ in pypi. If it is installed on the -# system, use it to handle IPAddress ServerAltnames (this was added in -# python-3.5) otherwise only do DNS matching. This allows -# backports.ssl_match_hostname to continue to be used all the way back to -# python-2.4. -try: - import ipaddress -except ImportError: - ipaddress = None - -__version__ = '3.5.0.1' - - -class CertificateError(ValueError): - pass - - -def _dnsname_match(dn, hostname, max_wildcards=1): - """Matching according to RFC 6125, section 6.4.3 - - http://tools.ietf.org/html/rfc6125#section-6.4.3 - """ - pats = [] - if not dn: - return False - - # Ported from python3-syntax: - # leftmost, *remainder = dn.split(r'.') - parts = dn.split(r'.') - leftmost = parts[0] - remainder = parts[1:] - - wildcards = leftmost.count('*') - if wildcards > max_wildcards: - # Issue #17980: avoid denials of service by refusing more - # than one wildcard per fragment. A survey of established - # policy among SSL implementations showed it to be a - # reasonable choice. - raise CertificateError( - "too many wildcards in certificate DNS name: " + repr(dn)) - - # speed up common case w/o wildcards - if not wildcards: - return dn.lower() == hostname.lower() - - # RFC 6125, section 6.4.3, subitem 1. - # The client SHOULD NOT attempt to match a presented identifier in which - # the wildcard character comprises a label other than the left-most label. - if leftmost == '*': - # When '*' is a fragment by itself, it matches a non-empty dotless - # fragment. - pats.append('[^.]+') - elif leftmost.startswith('xn--') or hostname.startswith('xn--'): - # RFC 6125, section 6.4.3, subitem 3. - # The client SHOULD NOT attempt to match a presented identifier - # where the wildcard character is embedded within an A-label or - # U-label of an internationalized domain name. - pats.append(re.escape(leftmost)) - else: - # Otherwise, '*' matches any dotless string, e.g. www* - pats.append(re.escape(leftmost).replace(r'\*', '[^.]*')) - - # add the remaining fragments, ignore any wildcards - for frag in remainder: - pats.append(re.escape(frag)) - - pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE) - return pat.match(hostname) - - -def _to_unicode(obj): - if isinstance(obj, str) and sys.version_info < (3,): - obj = unicode(obj, encoding='ascii', errors='strict') - return obj - -def _ipaddress_match(ipname, host_ip): - """Exact matching of IP addresses. - - RFC 6125 explicitly doesn't define an algorithm for this - (section 1.7.2 - "Out of Scope"). - """ - # OpenSSL may add a trailing newline to a subjectAltName's IP address - # Divergence from upstream: ipaddress can't handle byte str - ip = ipaddress.ip_address(_to_unicode(ipname).rstrip()) - return ip == host_ip - - -def match_hostname(cert, hostname): - """Verify that *cert* (in decoded format as returned by - SSLSocket.getpeercert()) matches the *hostname*. RFC 2818 and RFC 6125 - rules are 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, match_hostname needs a " - "SSL socket or SSL context with either " - "CERT_OPTIONAL or CERT_REQUIRED") - try: - # Divergence from upstream: ipaddress can't handle byte str - host_ip = ipaddress.ip_address(_to_unicode(hostname)) - except ValueError: - # Not an IP address (common case) - host_ip = None - except UnicodeError: - # Divergence from upstream: Have to deal with ipaddress not taking - # byte strings. addresses should be all ascii, so we consider it not - # an ipaddress in this case - host_ip = None - except AttributeError: - # Divergence from upstream: Make ipaddress library optional - if ipaddress is None: - host_ip = None - else: - raise - dnsnames = [] - san = cert.get('subjectAltName', ()) - for key, value in san: - if key == 'DNS': - if host_ip is None and _dnsname_match(value, hostname): - return - dnsnames.append(value) - elif key == 'IP Address': - if host_ip is not None and _ipaddress_match(value, host_ip): - 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_match(value, 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") |