Mercurial > hg
view mercurial/sslutil.py @ 14442:5b48ad1e7f1a
cmdutil: make private copies of option lists to avoid sharing monkeypatches
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 26 May 2011 17:15:35 -0500 |
parents | 5fa21960b2f4 |
children | 64dfbe576455 |
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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 ssl_wrap_socket = ssl.wrap_socket CERT_REQUIRED = ssl.CERT_REQUIRED except ImportError: CERT_REQUIRED = 2 def ssl_wrap_socket(sock, key_file, cert_file, cert_reqs=CERT_REQUIRED, ca_certs=None): 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 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 cacerts and not hostfingerprint: msg = _verifycert(sock.getpeercert(), host) if msg: raise util.Abort(_('%s certificate error: %s ' '(use --insecure to connect ' 'insecurely)') % (host, msg)) self.ui.debug('%s certificate successfully verified\n' % host) else: if getattr(sock, 'getpeercert', False): peercert = sock.getpeercert(True) 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(_('invalid certificate for %s ' 'with fingerprint %s') % (host, nicefingerprint)) self.ui.debug('%s certificate matched fingerprint %s\n' % (host, nicefingerprint)) else: self.ui.warn(_('warning: %s certificate ' 'with fingerprint %s not verified ' '(check hostfingerprints or web.cacerts ' 'config setting)\n') % (host, nicefingerprint)) else: # python 2.5 ? if hostfingerprint: raise util.Abort(_('no certificate for %s with ' 'configured hostfingerprint') % host) self.ui.warn(_('warning: %s certificate not verified ' '(check web.cacerts config setting)\n') % host)