mercurial/sslutil.py
author Augie Fackler <durin42@gmail.com>
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permissions -rw-r--r--
util: use safehasattr or getattr instead of hasattr
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# sslutil.py - SSL handling for mercurial
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#
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# Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com>
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# Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br>
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# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import os
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from mercurial import util
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from mercurial.i18n import _
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try:
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    # avoid using deprecated/broken FakeSocket in python 2.6
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    import ssl
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    ssl_wrap_socket = ssl.wrap_socket
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    CERT_REQUIRED = ssl.CERT_REQUIRED
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except ImportError:
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    CERT_REQUIRED = 2
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    import socket, httplib
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    def ssl_wrap_socket(sock, key_file, cert_file,
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                        cert_reqs=CERT_REQUIRED, ca_certs=None):
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        if ca_certs:
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            raise util.Abort(_(
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                'certificate checking requires Python 2.6'))
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        ssl = socket.ssl(sock, key_file, cert_file)
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        return httplib.FakeSocket(sock, ssl)
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def _verifycert(cert, hostname):
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    '''Verify that cert (in socket.getpeercert() format) matches hostname.
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    CRLs is not handled.
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    Returns error message if any problems are found and None on success.
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    '''
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    if not cert:
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        return _('no certificate received')
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    dnsname = hostname.lower()
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    def matchdnsname(certname):
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        return (certname == dnsname or
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                '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1])
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    san = cert.get('subjectAltName', [])
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    if san:
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        certnames = [value.lower() for key, value in san if key == 'DNS']
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        for name in certnames:
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            if matchdnsname(name):
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                return None
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        if certnames:
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            return _('certificate is for %s') % ', '.join(certnames)
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    # subject is only checked when subjectAltName is empty
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    for s in cert.get('subject', []):
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        key, value = s[0]
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        if key == 'commonName':
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            try:
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                # 'subject' entries are unicode
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                certname = value.lower().encode('ascii')
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            except UnicodeEncodeError:
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                return _('IDN in certificate not supported')
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            if matchdnsname(certname):
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                return None
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            return _('certificate is for %s') % certname
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    return _('no commonName or subjectAltName found in certificate')
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# CERT_REQUIRED means fetch the cert from the server all the time AND
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# validate it against the CA store provided in web.cacerts.
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#
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# We COMPLETELY ignore CERT_REQUIRED on Python <= 2.5, as it's totally
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# busted on those versions.
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def sslkwargs(ui, host):
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    cacerts = ui.config('web', 'cacerts')
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    hostfingerprint = ui.config('hostfingerprints', host)
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    if cacerts and not hostfingerprint:
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        cacerts = util.expandpath(cacerts)
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        if not os.path.exists(cacerts):
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            raise util.Abort(_('could not find web.cacerts: %s') % cacerts)
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        return {'ca_certs': cacerts,
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                'cert_reqs': CERT_REQUIRED,
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                }
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    return {}
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class validator(object):
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    def __init__(self, ui, host):
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        self.ui = ui
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        self.host = host
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    def __call__(self, sock):
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        host = self.host
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        cacerts = self.ui.config('web', 'cacerts')
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        hostfingerprint = self.ui.config('hostfingerprints', host)
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        if cacerts and not hostfingerprint:
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            msg = _verifycert(sock.getpeercert(), host)
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            if msg:
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                raise util.Abort(_('%s certificate error: %s '
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                                   '(use --insecure to connect '
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                                   'insecurely)') % (host, msg))
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            self.ui.debug('%s certificate successfully verified\n' % host)
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        else:
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            if getattr(sock, 'getpeercert', False):
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                peercert = sock.getpeercert(True)
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                peerfingerprint = util.sha1(peercert).hexdigest()
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                nicefingerprint = ":".join([peerfingerprint[x:x + 2]
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                    for x in xrange(0, len(peerfingerprint), 2)])
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                if hostfingerprint:
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                    if peerfingerprint.lower() != \
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                            hostfingerprint.replace(':', '').lower():
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                        raise util.Abort(_('invalid certificate for %s '
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                                           'with fingerprint %s') %
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                                         (host, nicefingerprint))
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                    self.ui.debug('%s certificate matched fingerprint %s\n' %
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                                  (host, nicefingerprint))
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                else:
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                    self.ui.warn(_('warning: %s certificate '
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                                   'with fingerprint %s not verified '
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                                   '(check hostfingerprints or web.cacerts '
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                                   'config setting)\n') %
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                                 (host, nicefingerprint))
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
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            else: # python 2.5 ?
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
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                if hostfingerprint:
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8f12dac18d13 sslutil: make messages for Python without certificate handling more helpful
Mads Kiilerich <mads@kiilerich.com>
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                    raise util.Abort(_("host fingerprint for %s can't be "
8f12dac18d13 sslutil: make messages for Python without certificate handling more helpful
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                                       "verified (Python too old)") % host)
8f12dac18d13 sslutil: make messages for Python without certificate handling more helpful
Mads Kiilerich <mads@kiilerich.com>
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                self.ui.warn(_("warning: certificate for %s can't be "
8f12dac18d13 sslutil: make messages for Python without certificate handling more helpful
Mads Kiilerich <mads@kiilerich.com>
parents: 14666
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                               "verified (Python too old)\n") % host)