sslutil.py
193 lines
| 7.9 KiB
| text/x-python
|
PythonLexer
/ mercurial / sslutil.py
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r14204 | # 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. | ||||
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r22575 | import os, sys | ||
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r14204 | |||
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 | ||||
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r19806 | PROTOCOL_SSLv23 = ssl.PROTOCOL_SSLv23 | ||
PROTOCOL_TLSv1 = ssl.PROTOCOL_TLSv1 | ||||
def ssl_wrap_socket(sock, keyfile, certfile, ssl_version=PROTOCOL_TLSv1, | ||||
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r15812 | cert_reqs=ssl.CERT_NONE, ca_certs=None): | ||
sslsocket = ssl.wrap_socket(sock, keyfile, certfile, | ||||
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r19806 | cert_reqs=cert_reqs, ca_certs=ca_certs, | ||
ssl_version=ssl_version) | ||||
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r15812 | # 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 | ||||
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r14204 | except ImportError: | ||
CERT_REQUIRED = 2 | ||||
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r19806 | PROTOCOL_SSLv23 = 2 | ||
PROTOCOL_TLSv1 = 3 | ||||
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r14616 | import socket, httplib | ||
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r19808 | def ssl_wrap_socket(sock, keyfile, certfile, ssl_version=PROTOCOL_TLSv1, | ||
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r14204 | cert_reqs=CERT_REQUIRED, ca_certs=None): | ||
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r15160 | if not util.safehasattr(socket, 'ssl'): | ||
raise util.Abort(_('Python SSL support not found')) | ||||
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r14204 | if ca_certs: | ||
raise util.Abort(_( | ||||
'certificate checking requires Python 2.6')) | ||||
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r19808 | ssl = socket.ssl(sock, keyfile, certfile) | ||
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r14204 | 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 | ||||
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r14666 | if certnames: | ||
return _('certificate is for %s') % ', '.join(certnames) | ||||
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r14204 | |||
# 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. | ||||
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r23042 | 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(): | ||||
return False | ||||
exe = (sys.executable or '').lower() | ||||
return (exe.startswith('/usr/bin/python') or | ||||
exe.startswith('/system/library/frameworks/python.framework/')) | ||||
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r14204 | def sslkwargs(ui, host): | ||
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r19806 | forcetls = ui.configbool('ui', 'tls', default=True) | ||
if forcetls: | ||||
ssl_version = PROTOCOL_TLSv1 | ||||
else: | ||||
ssl_version = PROTOCOL_SSLv23 | ||||
kws = {'ssl_version': ssl_version, | ||||
} | ||||
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r22574 | hostfingerprint = ui.config('hostfingerprints', host) | ||
if hostfingerprint: | ||||
return kws | ||||
cacerts = ui.config('web', 'cacerts') | ||||
if cacerts: | ||||
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r14204 | cacerts = util.expandpath(cacerts) | ||
if not os.path.exists(cacerts): | ||||
raise util.Abort(_('could not find web.cacerts: %s') % cacerts) | ||||
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r23042 | elif cacerts is None and _plainapplepython(): | ||
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r22575 | dummycert = os.path.join(os.path.dirname(__file__), 'dummycert.pem') | ||
if os.path.exists(dummycert): | ||||
ui.debug('using %s to enable OS X system CA\n' % dummycert) | ||||
ui.setconfig('web', 'cacerts', dummycert, 'dummy') | ||||
cacerts = dummycert | ||||
if cacerts: | ||||
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r19806 | kws.update({'ca_certs': cacerts, | ||
'cert_reqs': CERT_REQUIRED, | ||||
}) | ||||
return kws | ||||
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r14204 | |||
class validator(object): | ||||
def __init__(self, ui, host): | ||||
self.ui = ui | ||||
self.host = host | ||||
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r18887 | def __call__(self, sock, strict=False): | ||
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r14204 | host = self.host | ||
cacerts = self.ui.config('web', 'cacerts') | ||||
hostfingerprint = self.ui.config('hostfingerprints', host) | ||||
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r15813 | 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) | ||||
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r18887 | if strict: | ||
raise util.Abort(_("certificate for %s can't be verified " | ||||
"(Python too old)") % host) | ||||
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r16391 | if self.ui.configbool('ui', 'reportoldssl', True): | ||
self.ui.warn(_("warning: certificate for %s can't be verified " | ||||
"(Python too old)\n") % host) | ||||
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r15813 | return | ||
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r18879 | |||
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r15816 | if not sock.cipher(): # work around http://bugs.python.org/issue13721 | ||
raise util.Abort(_('%s ssl connection error') % host) | ||||
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r18879 | try: | ||
peercert = sock.getpeercert(True) | ||||
peercert2 = sock.getpeercert() | ||||
except AttributeError: | ||||
raise util.Abort(_('%s ssl connection error') % host) | ||||
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r15817 | if not peercert: | ||
raise util.Abort(_('%s certificate error: ' | ||||
'no certificate received') % host) | ||||
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r15814 | peerfingerprint = util.sha1(peercert).hexdigest() | ||
nicefingerprint = ":".join([peerfingerprint[x:x + 2] | ||||
for x in xrange(0, len(peerfingerprint), 2)]) | ||||
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r15815 | if hostfingerprint: | ||
if peerfingerprint.lower() != \ | ||||
hostfingerprint.replace(':', '').lower(): | ||||
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r15997 | raise util.Abort(_('certificate for %s has unexpected ' | ||
'fingerprint %s') % (host, nicefingerprint), | ||||
hint=_('check hostfingerprint configuration')) | ||||
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r15815 | self.ui.debug('%s certificate matched fingerprint %s\n' % | ||
(host, nicefingerprint)) | ||||
elif cacerts: | ||||
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r18879 | msg = _verifycert(peercert2, host) | ||
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r14204 | if msg: | ||
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r15814 | raise util.Abort(_('%s certificate error: %s') % (host, msg), | ||
hint=_('configure hostfingerprint %s or use ' | ||||
'--insecure to connect insecurely') % | ||||
nicefingerprint) | ||||
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r14204 | self.ui.debug('%s certificate successfully verified\n' % host) | ||
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r18887 | elif strict: | ||
raise util.Abort(_('%s certificate with fingerprint %s not ' | ||||
'verified') % (host, nicefingerprint), | ||||
hint=_('check hostfingerprints or web.cacerts ' | ||||
'config setting')) | ||||
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r14204 | else: | ||
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r15815 | self.ui.warn(_('warning: %s certificate with fingerprint %s not ' | ||
'verified (check hostfingerprints or web.cacerts ' | ||||
'config setting)\n') % | ||||
(host, nicefingerprint)) | ||||