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annotate mercurial/sslutil.py @ 25415:21b536f01eda

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ssl: prompt passphrase of client key file via ui.getpass() (issue4648) This is necessary to communicate with third-party tools through command-server channel. This requires SSLContext backported to Python 2.7.9+. It doesn't look nice to pass ui by sslkwargs, but I think it is the only way to do without touching various client codes including httpclient (aka http2). ui is mandatory if certfile is specified, so it has no default value. BTW, test-check-commit-hg.t complains that ssl_wrap_socket() has foo_bar naming. Should I bulk-replace it to sslwrapsocket() ?
author Yuya Nishihara <yuya@tcha.org>
date Thu, 07 May 2015 17:15:24 +0900
parents 241d98d84aed
children 9d1c61715939
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1 # sslutil.py - SSL handling for mercurial
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2 #
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3 # Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com>
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4 # Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br>
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5 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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6 #
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7 # This software may be used and distributed according to the terms of the
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8 # GNU General Public License version 2 or any later version.
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9 import os, sys
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10
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11 from mercurial import util
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12 from mercurial.i18n import _
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13
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14 _canloaddefaultcerts = False
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15 try:
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16 # avoid using deprecated/broken FakeSocket in python 2.6
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17 import ssl
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18 CERT_REQUIRED = ssl.CERT_REQUIRED
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19 try:
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20 ssl_context = ssl.SSLContext
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21 _canloaddefaultcerts = util.safehasattr(ssl_context,
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22 'load_default_certs')
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23
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24 def ssl_wrap_socket(sock, keyfile, certfile, ui,
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25 cert_reqs=ssl.CERT_NONE,
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26 ca_certs=None, serverhostname=None):
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27 # Allow any version of SSL starting with TLSv1 and
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28 # up. Note that specifying TLSv1 here prohibits use of
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29 # newer standards (like TLSv1_2), so this is the right way
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30 # to do this. Note that in the future it'd be better to
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31 # support using ssl.create_default_context(), which sets
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32 # up a bunch of things in smart ways (strong ciphers,
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33 # protocol versions, etc) and is upgraded by Python
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34 # maintainers for us, but that breaks too many things to
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35 # do it in a hurry.
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36 sslcontext = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
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37 sslcontext.options &= ssl.OP_NO_SSLv2 & ssl.OP_NO_SSLv3
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38 if certfile is not None:
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39 def password():
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40 f = keyfile or certfile
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41 return ui.getpass(_('passphrase for %s: ') % f, '')
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42 sslcontext.load_cert_chain(certfile, keyfile, password)
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43 sslcontext.verify_mode = cert_reqs
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44 if ca_certs is not None:
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45 sslcontext.load_verify_locations(cafile=ca_certs)
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46 elif _canloaddefaultcerts:
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47 sslcontext.load_default_certs()
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48
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49 sslsocket = sslcontext.wrap_socket(sock,
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50 server_hostname=serverhostname)
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51 # check if wrap_socket failed silently because socket had been
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52 # closed
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53 # - see http://bugs.python.org/issue13721
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54 if not sslsocket.cipher():
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55 raise util.Abort(_('ssl connection failed'))
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56 return sslsocket
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57 except AttributeError:
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58 def ssl_wrap_socket(sock, keyfile, certfile, ui,
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59 cert_reqs=ssl.CERT_NONE,
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60 ca_certs=None, serverhostname=None):
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61 sslsocket = ssl.wrap_socket(sock, keyfile, certfile,
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62 cert_reqs=cert_reqs, ca_certs=ca_certs,
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63 ssl_version=ssl.PROTOCOL_TLSv1)
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64 # check if wrap_socket failed silently because socket had been
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65 # closed
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66 # - see http://bugs.python.org/issue13721
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67 if not sslsocket.cipher():
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68 raise util.Abort(_('ssl connection failed'))
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69 return sslsocket
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70 except ImportError:
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71 CERT_REQUIRED = 2
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72
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73 import socket, httplib
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74
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75 def ssl_wrap_socket(sock, keyfile, certfile, ui,
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76 cert_reqs=CERT_REQUIRED,
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77 ca_certs=None, serverhostname=None):
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78 if not util.safehasattr(socket, 'ssl'):
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79 raise util.Abort(_('Python SSL support not found'))
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80 if ca_certs:
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81 raise util.Abort(_(
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82 'certificate checking requires Python 2.6'))
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83
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84 ssl = socket.ssl(sock, keyfile, certfile)
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85 return httplib.FakeSocket(sock, ssl)
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86
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87 def _verifycert(cert, hostname):
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88 '''Verify that cert (in socket.getpeercert() format) matches hostname.
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89 CRLs is not handled.
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90
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91 Returns error message if any problems are found and None on success.
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92 '''
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93 if not cert:
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94 return _('no certificate received')
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95 dnsname = hostname.lower()
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96 def matchdnsname(certname):
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97 return (certname == dnsname or
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98 '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1])
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99
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100 san = cert.get('subjectAltName', [])
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101 if san:
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102 certnames = [value.lower() for key, value in san if key == 'DNS']
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103 for name in certnames:
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104 if matchdnsname(name):
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105 return None
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106 if certnames:
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107 return _('certificate is for %s') % ', '.join(certnames)
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108
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109 # subject is only checked when subjectAltName is empty
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110 for s in cert.get('subject', []):
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111 key, value = s[0]
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112 if key == 'commonName':
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113 try:
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114 # 'subject' entries are unicode
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115 certname = value.lower().encode('ascii')
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116 except UnicodeEncodeError:
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117 return _('IDN in certificate not supported')
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118 if matchdnsname(certname):
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diff changeset
119 return None
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
120 return _('certificate is for %s') % certname
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Augie Fackler <durin42@gmail.com>
parents:
diff changeset
121 return _('no commonName or subjectAltName found in certificate')
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parents:
diff changeset
122
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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parents:
diff changeset
123
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
124 # CERT_REQUIRED means fetch the cert from the server all the time AND
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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parents:
diff changeset
125 # validate it against the CA store provided in web.cacerts.
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parents:
diff changeset
126 #
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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127 # We COMPLETELY ignore CERT_REQUIRED on Python <= 2.5, as it's totally
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
128 # busted on those versions.
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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129
23042
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
130 def _plainapplepython():
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
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diff changeset
131 """return true if this seems to be a pure Apple Python that
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
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parents: 22575
diff changeset
132 * is unfrozen and presumably has the whole mercurial module in the file
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
133 system
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
134 * presumably is an Apple Python that uses Apple OpenSSL which has patches
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
135 for using system certificate store CAs in addition to the provided
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
136 cacerts file
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
137 """
24614
241d98d84aed ssl: resolve symlink before checking for Apple python executable (issue4588)
Yuya Nishihara <yuya@tcha.org>
parents: 24291
diff changeset
138 if sys.platform != 'darwin' or util.mainfrozen() or not sys.executable:
23042
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
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parents: 22575
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139 return False
24614
241d98d84aed ssl: resolve symlink before checking for Apple python executable (issue4588)
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parents: 24291
diff changeset
140 exe = os.path.realpath(sys.executable).lower()
23042
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Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
141 return (exe.startswith('/usr/bin/python') or
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
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parents: 22575
diff changeset
142 exe.startswith('/system/library/frameworks/python.framework/'))
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
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parents: 22575
diff changeset
143
24288
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144 def _defaultcacerts():
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145 """return path to CA certificates; None for system's store; ! to disable"""
24288
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diff changeset
146 if _plainapplepython():
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diff changeset
147 dummycert = os.path.join(os.path.dirname(__file__), 'dummycert.pem')
922e087ba158 ssl: extract function that returns dummycert path on Apple python
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diff changeset
148 if os.path.exists(dummycert):
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149 return dummycert
24291
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diff changeset
150 if _canloaddefaultcerts:
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151 return None
24290
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152 return '!'
24288
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diff changeset
153
14204
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154 def sslkwargs(ui, host):
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21b536f01eda ssl: prompt passphrase of client key file via ui.getpass() (issue4648)
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diff changeset
155 kws = {'ui': ui}
22574
a00a7951b20c ssl: refactor sslkwargs - move things around a bit, preparing for next change
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parents: 19808
diff changeset
156 hostfingerprint = ui.config('hostfingerprints', host)
a00a7951b20c ssl: refactor sslkwargs - move things around a bit, preparing for next change
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parents: 19808
diff changeset
157 if hostfingerprint:
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parents: 19808
diff changeset
158 return kws
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parents: 19808
diff changeset
159 cacerts = ui.config('web', 'cacerts')
24290
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diff changeset
160 if cacerts == '!':
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
161 pass
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
162 elif cacerts:
14204
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163 cacerts = util.expandpath(cacerts)
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parents:
diff changeset
164 if not os.path.exists(cacerts):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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165 raise util.Abort(_('could not find web.cacerts: %s') % cacerts)
24290
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
166 else:
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
167 cacerts = _defaultcacerts()
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Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
168 if cacerts and cacerts != '!':
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
169 ui.debug('using %s to enable OS X system CA\n' % cacerts)
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
170 ui.setconfig('web', 'cacerts', cacerts, 'defaultcacerts')
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
171 if cacerts != '!':
19806
47ff9d1abfa9 sslutil: add a config knob to support TLS (default) or SSLv23 (bc) (issue4038)
Augie Fackler <raf@durin42.com>
parents: 19749
diff changeset
172 kws.update({'ca_certs': cacerts,
47ff9d1abfa9 sslutil: add a config knob to support TLS (default) or SSLv23 (bc) (issue4038)
Augie Fackler <raf@durin42.com>
parents: 19749
diff changeset
173 'cert_reqs': CERT_REQUIRED,
47ff9d1abfa9 sslutil: add a config knob to support TLS (default) or SSLv23 (bc) (issue4038)
Augie Fackler <raf@durin42.com>
parents: 19749
diff changeset
174 })
47ff9d1abfa9 sslutil: add a config knob to support TLS (default) or SSLv23 (bc) (issue4038)
Augie Fackler <raf@durin42.com>
parents: 19749
diff changeset
175 return kws
14204
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diff changeset
176
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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parents:
diff changeset
177 class validator(object):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
178 def __init__(self, ui, host):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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parents:
diff changeset
179 self.ui = ui
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parents:
diff changeset
180 self.host = host
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parents:
diff changeset
181
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diff changeset
182 def __call__(self, sock, strict=False):
14204
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parents:
diff changeset
183 host = self.host
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parents:
diff changeset
184 cacerts = self.ui.config('web', 'cacerts')
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parents:
diff changeset
185 hostfingerprint = self.ui.config('hostfingerprints', host)
15813
3ae04eb5e38a sslutil: handle setups without .getpeercert() early in the validator
Mads Kiilerich <mads@kiilerich.com>
parents: 15812
diff changeset
186 if not getattr(sock, 'getpeercert', False): # python 2.5 ?
3ae04eb5e38a sslutil: handle setups without .getpeercert() early in the validator
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parents: 15812
diff changeset
187 if hostfingerprint:
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parents: 15812
diff changeset
188 raise util.Abort(_("host fingerprint for %s can't be "
3ae04eb5e38a sslutil: handle setups without .getpeercert() early in the validator
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parents: 15812
diff changeset
189 "verified (Python too old)") % host)
18887
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
190 if strict:
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
191 raise util.Abort(_("certificate for %s can't be verified "
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
192 "(Python too old)") % host)
16391
9cf7c9d529d0 ui: optionally quiesce ssl verification warnings on python 2.5
Steven Stallion <sstallion@gmail.com>
parents: 15997
diff changeset
193 if self.ui.configbool('ui', 'reportoldssl', True):
9cf7c9d529d0 ui: optionally quiesce ssl verification warnings on python 2.5
Steven Stallion <sstallion@gmail.com>
parents: 15997
diff changeset
194 self.ui.warn(_("warning: certificate for %s can't be verified "
9cf7c9d529d0 ui: optionally quiesce ssl verification warnings on python 2.5
Steven Stallion <sstallion@gmail.com>
parents: 15997
diff changeset
195 "(Python too old)\n") % host)
15813
3ae04eb5e38a sslutil: handle setups without .getpeercert() early in the validator
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parents: 15812
diff changeset
196 return
18879
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
197
15816
4bb59919c905 sslutil: work around validator crash getting certificate on failed sockets
Mads Kiilerich <mads@kiilerich.com>
parents: 15815
diff changeset
198 if not sock.cipher(): # work around http://bugs.python.org/issue13721
4bb59919c905 sslutil: work around validator crash getting certificate on failed sockets
Mads Kiilerich <mads@kiilerich.com>
parents: 15815
diff changeset
199 raise util.Abort(_('%s ssl connection error') % host)
18879
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
200 try:
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
201 peercert = sock.getpeercert(True)
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
202 peercert2 = sock.getpeercert()
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
203 except AttributeError:
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
204 raise util.Abort(_('%s ssl connection error') % host)
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
205
15817
8f377751b510 sslutil: abort properly if no certificate received for https connection
Mads Kiilerich <mads@kiilerich.com>
parents: 15816
diff changeset
206 if not peercert:
8f377751b510 sslutil: abort properly if no certificate received for https connection
Mads Kiilerich <mads@kiilerich.com>
parents: 15816
diff changeset
207 raise util.Abort(_('%s certificate error: '
8f377751b510 sslutil: abort properly if no certificate received for https connection
Mads Kiilerich <mads@kiilerich.com>
parents: 15816
diff changeset
208 'no certificate received') % host)
15814
c3e958b50a22 sslutil: show fingerprint when cacerts validation fails
Mads Kiilerich <mads@kiilerich.com>
parents: 15813
diff changeset
209 peerfingerprint = util.sha1(peercert).hexdigest()
c3e958b50a22 sslutil: show fingerprint when cacerts validation fails
Mads Kiilerich <mads@kiilerich.com>
parents: 15813
diff changeset
210 nicefingerprint = ":".join([peerfingerprint[x:x + 2]
c3e958b50a22 sslutil: show fingerprint when cacerts validation fails
Mads Kiilerich <mads@kiilerich.com>
parents: 15813
diff changeset
211 for x in xrange(0, len(peerfingerprint), 2)])
15815
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
212 if hostfingerprint:
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
213 if peerfingerprint.lower() != \
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
214 hostfingerprint.replace(':', '').lower():
15997
a45516cb8d9f sslutil: more helpful fingerprint mismatch message
Matt Mackall <mpm@selenic.com>
parents: 15817
diff changeset
215 raise util.Abort(_('certificate for %s has unexpected '
a45516cb8d9f sslutil: more helpful fingerprint mismatch message
Matt Mackall <mpm@selenic.com>
parents: 15817
diff changeset
216 'fingerprint %s') % (host, nicefingerprint),
a45516cb8d9f sslutil: more helpful fingerprint mismatch message
Matt Mackall <mpm@selenic.com>
parents: 15817
diff changeset
217 hint=_('check hostfingerprint configuration'))
15815
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
218 self.ui.debug('%s certificate matched fingerprint %s\n' %
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
219 (host, nicefingerprint))
24290
b76d8c641746 ssl: set explicit symbol "!" to web.cacerts to disable SSL verification (BC)
Yuya Nishihara <yuya@tcha.org>
parents: 24288
diff changeset
220 elif cacerts != '!':
18879
93b03a222c3e sslutil: try harder to avoid getpeercert problems
Matt Mackall <mpm@selenic.com>
parents: 16391
diff changeset
221 msg = _verifycert(peercert2, host)
14204
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parents:
diff changeset
222 if msg:
15814
c3e958b50a22 sslutil: show fingerprint when cacerts validation fails
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parents: 15813
diff changeset
223 raise util.Abort(_('%s certificate error: %s') % (host, msg),
c3e958b50a22 sslutil: show fingerprint when cacerts validation fails
Mads Kiilerich <mads@kiilerich.com>
parents: 15813
diff changeset
224 hint=_('configure hostfingerprint %s or use '
c3e958b50a22 sslutil: show fingerprint when cacerts validation fails
Mads Kiilerich <mads@kiilerich.com>
parents: 15813
diff changeset
225 '--insecure to connect insecurely') %
c3e958b50a22 sslutil: show fingerprint when cacerts validation fails
Mads Kiilerich <mads@kiilerich.com>
parents: 15813
diff changeset
226 nicefingerprint)
14204
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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parents:
diff changeset
227 self.ui.debug('%s certificate successfully verified\n' % host)
18887
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
228 elif strict:
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
229 raise util.Abort(_('%s certificate with fingerprint %s not '
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
230 'verified') % (host, nicefingerprint),
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
231 hint=_('check hostfingerprints or web.cacerts '
2d7fac049d3a sslutil: abort if peer certificate is not verified for secure use
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 18879
diff changeset
232 'config setting'))
14204
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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parents:
diff changeset
233 else:
15815
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
234 self.ui.warn(_('warning: %s certificate with fingerprint %s not '
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
235 'verified (check hostfingerprints or web.cacerts '
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
236 'config setting)\n') %
edc3a901a63d sslutil: reorder validator code to make it more readable
Mads Kiilerich <mads@kiilerich.com>
parents: 15814
diff changeset
237 (host, nicefingerprint))