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Current File : //lib/python2.7/site-packages/setuptools/ssl_support.py
import sys, os, socket, atexit, re import pkg_resources from pkg_resources import ResolutionError, ExtractionError from setuptools.compat import urllib2 try: import ssl except ImportError: ssl = None __all__ = [ 'VerifyingHTTPSHandler', 'find_ca_bundle', 'is_available', 'cert_paths', 'opener_for' ] cert_paths = """ /etc/pki/tls/certs/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt /usr/share/ssl/certs/ca-bundle.crt /usr/local/share/certs/ca-root.crt /etc/ssl/cert.pem /System/Library/OpenSSL/certs/cert.pem """.strip().split() HTTPSHandler = HTTPSConnection = object for what, where in ( ('HTTPSHandler', ['urllib2','urllib.request']), ('HTTPSConnection', ['httplib', 'http.client']), ): for module in where: try: exec("from %s import %s" % (module, what)) except ImportError: pass is_available = ssl is not None and object not in (HTTPSHandler, HTTPSConnection) try: from socket import create_connection except ImportError: _GLOBAL_DEFAULT_TIMEOUT = getattr(socket, '_GLOBAL_DEFAULT_TIMEOUT', object()) def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None): """Connect to *address* and return the socket object. Convenience function. Connect to *address* (a 2-tuple ``(host, port)``) and return the socket object. Passing the optional *timeout* parameter will set the timeout on the socket instance before attempting to connect. If no *timeout* is supplied, the global default timeout setting returned by :func:`getdefaulttimeout` is used. If *source_address* is set it must be a tuple of (host, port) for the socket to bind as a source address before making the connection. An host of '' or port 0 tells the OS to use the default. """ host, port = address err = None for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM): af, socktype, proto, canonname, sa = res sock = None try: sock = socket.socket(af, socktype, proto) if timeout is not _GLOBAL_DEFAULT_TIMEOUT: sock.settimeout(timeout) if source_address: sock.bind(source_address) sock.connect(sa) return sock except error: err = True if sock is not None: sock.close() if err: raise else: raise error("getaddrinfo returns an empty list") from backports.ssl_match_hostname import CertificateError, match_hostname class VerifyingHTTPSHandler(HTTPSHandler): """Simple verifying handler: no auth, subclasses, timeouts, etc.""" def __init__(self, ca_bundle): self.ca_bundle = ca_bundle HTTPSHandler.__init__(self) def https_open(self, req): return self.do_open( lambda host, **kw: VerifyingHTTPSConn(host, self.ca_bundle, **kw), req ) class VerifyingHTTPSConn(HTTPSConnection): """Simple verifying connection: no auth, subclasses, timeouts, etc.""" def __init__(self, host, ca_bundle, **kw): HTTPSConnection.__init__(self, host, **kw) self.ca_bundle = ca_bundle def connect(self): sock = create_connection( (self.host, self.port), getattr(self,'source_address',None) ) # Handle the socket if a (proxy) tunnel is present if hasattr(self, '_tunnel') and getattr(self, '_tunnel_host', None): self.sock = sock self._tunnel() # http://bugs.python.org/issue7776: Python>=3.4.1 and >=2.7.7 # change self.host to mean the proxy server host when tunneling is # being used. Adapt, since we are interested in the destination # host for the match_hostname() comparison. actual_host = self._tunnel_host else: actual_host = self.host self.sock = ssl.wrap_socket( sock, cert_reqs=ssl.CERT_REQUIRED, ca_certs=self.ca_bundle ) try: match_hostname(self.sock.getpeercert(), actual_host) except CertificateError: self.sock.shutdown(socket.SHUT_RDWR) self.sock.close() raise def opener_for(ca_bundle=None): """Get a urlopen() replacement that uses ca_bundle for verification""" return urllib2.build_opener( VerifyingHTTPSHandler(ca_bundle or find_ca_bundle()) ).open _wincerts = None def get_win_certfile(): global _wincerts if _wincerts is not None: return _wincerts.name try: from wincertstore import CertFile except ImportError: return None class MyCertFile(CertFile): def __init__(self, stores=(), certs=()): CertFile.__init__(self) for store in stores: self.addstore(store) self.addcerts(certs) atexit.register(self.close) _wincerts = MyCertFile(stores=['CA', 'ROOT']) return _wincerts.name def find_ca_bundle(): """Return an existing CA bundle path, or None""" if os.name=='nt': return get_win_certfile() else: for cert_path in cert_paths: if os.path.isfile(cert_path): return cert_path try: return pkg_resources.resource_filename('certifi', 'cacert.pem') except (ImportError, ResolutionError, ExtractionError): return None
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