/usr/lib/python2.7/dist-packages/mercurial/sslutil.py is in mercurial-common 3.7.3-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | # 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.
from __future__ import absolute_import
import os
import ssl
import sys
from .i18n import _
from . import error, util
hassni = getattr(ssl, 'HAS_SNI', False)
_canloaddefaultcerts = False
try:
ssl_context = ssl.SSLContext
_canloaddefaultcerts = util.safehasattr(ssl_context, 'load_default_certs')
def wrapsocket(sock, keyfile, certfile, ui, cert_reqs=ssl.CERT_NONE,
ca_certs=None, serverhostname=None):
# Allow any version of SSL starting with TLSv1 and
# up. Note that specifying TLSv1 here prohibits use of
# newer standards (like TLSv1_2), so this is the right way
# to do this. Note that in the future it'd be better to
# support using ssl.create_default_context(), which sets
# up a bunch of things in smart ways (strong ciphers,
# protocol versions, etc) and is upgraded by Python
# maintainers for us, but that breaks too many things to
# do it in a hurry.
sslcontext = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
sslcontext.options |= ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3
if certfile is not None:
def password():
f = keyfile or certfile
return ui.getpass(_('passphrase for %s: ') % f, '')
sslcontext.load_cert_chain(certfile, keyfile, password)
sslcontext.verify_mode = cert_reqs
if ca_certs is not None:
sslcontext.load_verify_locations(cafile=ca_certs)
elif _canloaddefaultcerts:
sslcontext.load_default_certs()
sslsocket = sslcontext.wrap_socket(sock, server_hostname=serverhostname)
# check if wrap_socket failed silently because socket had been
# closed
# - see http://bugs.python.org/issue13721
if not sslsocket.cipher():
raise error.Abort(_('ssl connection failed'))
return sslsocket
except AttributeError:
def wrapsocket(sock, keyfile, certfile, ui, cert_reqs=ssl.CERT_NONE,
ca_certs=None, serverhostname=None):
sslsocket = ssl.wrap_socket(sock, keyfile, certfile,
cert_reqs=cert_reqs, ca_certs=ca_certs,
ssl_version=ssl.PROTOCOL_TLSv1)
# check if wrap_socket failed silently because socket had been
# closed
# - see http://bugs.python.org/issue13721
if not sslsocket.cipher():
raise error.Abort(_('ssl connection failed'))
return sslsocket
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.
def _plainapplepython():
"""return true if this seems to be a pure Apple Python that
* is unfrozen and presumably has the whole mercurial module in the file
system
* presumably is an Apple Python that uses Apple OpenSSL which has patches
for using system certificate store CAs in addition to the provided
cacerts file
"""
if sys.platform != 'darwin' or util.mainfrozen() or not sys.executable:
return False
exe = os.path.realpath(sys.executable).lower()
return (exe.startswith('/usr/bin/python') or
exe.startswith('/system/library/frameworks/python.framework/'))
def _defaultcacerts():
"""return path to CA certificates; None for system's store; ! to disable"""
if _plainapplepython():
dummycert = os.path.join(os.path.dirname(__file__), 'dummycert.pem')
if os.path.exists(dummycert):
return dummycert
if _canloaddefaultcerts:
return None
return '!'
def sslkwargs(ui, host):
kws = {'ui': ui}
hostfingerprint = ui.config('hostfingerprints', host)
if hostfingerprint:
return kws
cacerts = ui.config('web', 'cacerts')
if cacerts == '!':
pass
elif cacerts:
cacerts = util.expandpath(cacerts)
if not os.path.exists(cacerts):
raise error.Abort(_('could not find web.cacerts: %s') % cacerts)
else:
cacerts = _defaultcacerts()
if cacerts and cacerts != '!':
ui.debug('using %s to enable OS X system CA\n' % cacerts)
ui.setconfig('web', 'cacerts', cacerts, 'defaultcacerts')
if cacerts != '!':
kws.update({'ca_certs': cacerts,
'cert_reqs': ssl.CERT_REQUIRED,
})
return kws
class validator(object):
def __init__(self, ui, host):
self.ui = ui
self.host = host
def __call__(self, sock, strict=False):
host = self.host
cacerts = self.ui.config('web', 'cacerts')
hostfingerprint = self.ui.config('hostfingerprints', host)
if not sock.cipher(): # work around http://bugs.python.org/issue13721
raise error.Abort(_('%s ssl connection error') % host)
try:
peercert = sock.getpeercert(True)
peercert2 = sock.getpeercert()
except AttributeError:
raise error.Abort(_('%s ssl connection error') % host)
if not peercert:
raise error.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 error.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(peercert2, host)
if msg:
raise error.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)
elif strict:
raise error.Abort(_('%s certificate with fingerprint %s not '
'verified') % (host, nicefingerprint),
hint=_('check hostfingerprints or web.cacerts '
'config setting'))
else:
self.ui.warn(_('warning: %s certificate with fingerprint %s not '
'verified (check hostfingerprints or web.cacerts '
'config setting)\n') %
(host, nicefingerprint))
|