Mercurial > hg
view mercurial/sslutil.py @ 17297:6955d69a52a4 stable
obsolete: warns if markers exist in a repo where the feature is not enabled
We don't simply abort to allow the user to run other diagnostic commands.
author | Pierre-Yves David <pierre-yves.david@logilab.fr> |
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date | Sat, 28 Jul 2012 13:05:25 +0200 |
parents | 9cf7c9d529d0 |
children | 93b03a222c3e |
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# sslutil.py - SSL handling for mercurial # # Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com> # Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br> # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import os from mercurial import util from mercurial.i18n import _ try: # avoid using deprecated/broken FakeSocket in python 2.6 import ssl CERT_REQUIRED = ssl.CERT_REQUIRED def ssl_wrap_socket(sock, keyfile, certfile, cert_reqs=ssl.CERT_NONE, ca_certs=None): sslsocket = ssl.wrap_socket(sock, keyfile, certfile, cert_reqs=cert_reqs, ca_certs=ca_certs) # check if wrap_socket failed silently because socket had been closed # - see http://bugs.python.org/issue13721 if not sslsocket.cipher(): raise util.Abort(_('ssl connection failed')) return sslsocket except ImportError: CERT_REQUIRED = 2 import socket, httplib def ssl_wrap_socket(sock, key_file, cert_file, cert_reqs=CERT_REQUIRED, ca_certs=None): if not util.safehasattr(socket, 'ssl'): raise util.Abort(_('Python SSL support not found')) if ca_certs: raise util.Abort(_( 'certificate checking requires Python 2.6')) ssl = socket.ssl(sock, key_file, cert_file) return httplib.FakeSocket(sock, ssl) def _verifycert(cert, hostname): '''Verify that cert (in socket.getpeercert() format) matches hostname. CRLs is not handled. Returns error message if any problems are found and None on success. ''' if not cert: return _('no certificate received') dnsname = hostname.lower() def matchdnsname(certname): return (certname == dnsname or '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1]) san = cert.get('subjectAltName', []) if san: certnames = [value.lower() for key, value in san if key == 'DNS'] for name in certnames: if matchdnsname(name): return None if certnames: return _('certificate is for %s') % ', '.join(certnames) # subject is only checked when subjectAltName is empty for s in cert.get('subject', []): key, value = s[0] if key == 'commonName': try: # 'subject' entries are unicode certname = value.lower().encode('ascii') except UnicodeEncodeError: return _('IDN in certificate not supported') if matchdnsname(certname): return None return _('certificate is for %s') % certname return _('no commonName or subjectAltName found in certificate') # CERT_REQUIRED means fetch the cert from the server all the time AND # validate it against the CA store provided in web.cacerts. # # We COMPLETELY ignore CERT_REQUIRED on Python <= 2.5, as it's totally # busted on those versions. def sslkwargs(ui, host): cacerts = ui.config('web', 'cacerts') hostfingerprint = ui.config('hostfingerprints', host) if cacerts and not hostfingerprint: cacerts = util.expandpath(cacerts) if not os.path.exists(cacerts): raise util.Abort(_('could not find web.cacerts: %s') % cacerts) return {'ca_certs': cacerts, 'cert_reqs': CERT_REQUIRED, } return {} class validator(object): def __init__(self, ui, host): self.ui = ui self.host = host def __call__(self, sock): host = self.host cacerts = self.ui.config('web', 'cacerts') hostfingerprint = self.ui.config('hostfingerprints', host) if not getattr(sock, 'getpeercert', False): # python 2.5 ? if hostfingerprint: raise util.Abort(_("host fingerprint for %s can't be " "verified (Python too old)") % host) if self.ui.configbool('ui', 'reportoldssl', True): self.ui.warn(_("warning: certificate for %s can't be verified " "(Python too old)\n") % host) return if not sock.cipher(): # work around http://bugs.python.org/issue13721 raise util.Abort(_('%s ssl connection error') % host) peercert = sock.getpeercert(True) if not peercert: raise util.Abort(_('%s certificate error: ' 'no certificate received') % host) peerfingerprint = util.sha1(peercert).hexdigest() nicefingerprint = ":".join([peerfingerprint[x:x + 2] for x in xrange(0, len(peerfingerprint), 2)]) if hostfingerprint: if peerfingerprint.lower() != \ hostfingerprint.replace(':', '').lower(): raise util.Abort(_('certificate for %s has unexpected ' 'fingerprint %s') % (host, nicefingerprint), hint=_('check hostfingerprint configuration')) self.ui.debug('%s certificate matched fingerprint %s\n' % (host, nicefingerprint)) elif cacerts: msg = _verifycert(sock.getpeercert(), host) if msg: raise util.Abort(_('%s certificate error: %s') % (host, msg), hint=_('configure hostfingerprint %s or use ' '--insecure to connect insecurely') % nicefingerprint) self.ui.debug('%s certificate successfully verified\n' % host) else: self.ui.warn(_('warning: %s certificate with fingerprint %s not ' 'verified (check hostfingerprints or web.cacerts ' 'config setting)\n') % (host, nicefingerprint))