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annotate mercurial/sslutil.py @ 29253:9da137faaa9c

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sslutil: remove sslkwargs() (API) It is now unused.
author Gregory Szorc <gregory.szorc@gmail.com>
date Wed, 25 May 2016 19:57:31 -0700
parents cca59ef27e60
children 6315c1e14f75
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5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
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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
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10 from __future__ import absolute_import
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11
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12 import os
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13 import ssl
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14 import sys
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15
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16 from .i18n import _
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17 from . import (
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18 error,
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19 util,
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20 )
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760a86865f80 ssl: load CA certificates from system's store by default on Python 2.7.9
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21
28647
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22 # Python 2.7.9+ overhauled the built-in SSL/TLS features of Python. It added
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23 # support for TLS 1.1, TLS 1.2, SNI, system CA stores, etc. These features are
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24 # all exposed via the "ssl" module.
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25 #
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26 # Depending on the version of Python being used, SSL/TLS support is either
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27 # modern/secure or legacy/insecure. Many operations in this module have
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28 # separate code paths depending on support in Python.
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29
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30 hassni = getattr(ssl, 'HAS_SNI', False)
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31
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32 try:
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33 OP_NO_SSLv2 = ssl.OP_NO_SSLv2
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34 OP_NO_SSLv3 = ssl.OP_NO_SSLv3
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35 except AttributeError:
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36 OP_NO_SSLv2 = 0x1000000
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37 OP_NO_SSLv3 = 0x2000000
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38
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39 try:
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40 # ssl.SSLContext was added in 2.7.9 and presence indicates modern
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41 # SSL/TLS features are available.
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42 SSLContext = ssl.SSLContext
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43 modernssl = True
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44 _canloaddefaultcerts = util.safehasattr(SSLContext, 'load_default_certs')
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45 except AttributeError:
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46 modernssl = False
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47 _canloaddefaultcerts = False
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48
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49 # We implement SSLContext using the interface from the standard library.
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50 class SSLContext(object):
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51 # ssl.wrap_socket gained the "ciphers" named argument in 2.7.
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52 _supportsciphers = sys.version_info >= (2, 7)
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53
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54 def __init__(self, protocol):
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55 # From the public interface of SSLContext
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56 self.protocol = protocol
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57 self.check_hostname = False
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58 self.options = 0
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59 self.verify_mode = ssl.CERT_NONE
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60
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61 # Used by our implementation.
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62 self._certfile = None
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63 self._keyfile = None
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64 self._certpassword = None
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65 self._cacerts = None
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66 self._ciphers = None
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67
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68 def load_cert_chain(self, certfile, keyfile=None, password=None):
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69 self._certfile = certfile
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70 self._keyfile = keyfile
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71 self._certpassword = password
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72
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73 def load_default_certs(self, purpose=None):
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74 pass
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75
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76 def load_verify_locations(self, cafile=None, capath=None, cadata=None):
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77 if capath:
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78 raise error.Abort('capath not supported')
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79 if cadata:
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80 raise error.Abort('cadata not supported')
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81
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82 self._cacerts = cafile
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83
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84 def set_ciphers(self, ciphers):
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85 if not self._supportsciphers:
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86 raise error.Abort('setting ciphers not supported')
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87
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88 self._ciphers = ciphers
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89
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90 def wrap_socket(self, socket, server_hostname=None, server_side=False):
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91 # server_hostname is unique to SSLContext.wrap_socket and is used
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92 # for SNI in that context. So there's nothing for us to do with it
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93 # in this legacy code since we don't support SNI.
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94
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95 args = {
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96 'keyfile': self._keyfile,
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97 'certfile': self._certfile,
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98 'server_side': server_side,
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99 'cert_reqs': self.verify_mode,
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100 'ssl_version': self.protocol,
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101 'ca_certs': self._cacerts,
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102 }
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103
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104 if self._supportsciphers:
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105 args['ciphers'] = self._ciphers
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106
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107 return ssl.wrap_socket(socket, **args)
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108
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109 def _determinecertoptions(ui, host):
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110 """Determine certificate options for a connections.
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111
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112 Returns a tuple of (cert_reqs, ca_certs).
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113 """
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114 # If a host key fingerprint is on file, it is the only thing that matters
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115 # and CA certs don't come into play.
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116 hostfingerprint = ui.config('hostfingerprints', host)
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117 if hostfingerprint:
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118 return ssl.CERT_NONE, None
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119
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120 # The code below sets up CA verification arguments. If --insecure is
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121 # used, we don't take CAs into consideration, so return early.
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122 if ui.insecureconnections:
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123 return ssl.CERT_NONE, None
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124
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125 cacerts = ui.config('web', 'cacerts')
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126
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127 # If a value is set in the config, validate against a path and load
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128 # and require those certs.
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129 if cacerts:
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130 cacerts = util.expandpath(cacerts)
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131 if not os.path.exists(cacerts):
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132 raise error.Abort(_('could not find web.cacerts: %s') % cacerts)
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133
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134 return ssl.CERT_REQUIRED, cacerts
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135
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136 # No CAs in config. See if we can load defaults.
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137 cacerts = _defaultcacerts()
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parents: 29248
diff changeset
138
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diff changeset
139 # We found an alternate CA bundle to use. Load it.
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parents: 29248
diff changeset
140 if cacerts:
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parents: 29248
diff changeset
141 ui.debug('using %s to enable OS X system CA\n' % cacerts)
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parents: 29248
diff changeset
142 ui.setconfig('web', 'cacerts', cacerts, 'defaultcacerts')
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parents: 29248
diff changeset
143 return ssl.CERT_REQUIRED, cacerts
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parents: 29248
diff changeset
144
cca59ef27e60 sslutil: move sslkwargs logic into internal function (API)
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diff changeset
145 # FUTURE this can disappear once wrapsocket() is secure by default.
cca59ef27e60 sslutil: move sslkwargs logic into internal function (API)
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parents: 29248
diff changeset
146 if _canloaddefaultcerts:
cca59ef27e60 sslutil: move sslkwargs logic into internal function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29248
diff changeset
147 return ssl.CERT_REQUIRED, None
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148
cca59ef27e60 sslutil: move sslkwargs logic into internal function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29248
diff changeset
149 return ssl.CERT_NONE, None
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diff changeset
150
cca59ef27e60 sslutil: move sslkwargs logic into internal function (API)
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parents: 29248
diff changeset
151 def wrapsocket(sock, keyfile, certfile, ui, serverhostname=None):
28653
1eb0bd8adf39 sslutil: add docstring to wrapsocket()
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152 """Add SSL/TLS to a socket.
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153
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diff changeset
154 This is a glorified wrapper for ``ssl.wrap_socket()``. It makes sane
1eb0bd8adf39 sslutil: add docstring to wrapsocket()
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parents: 28652
diff changeset
155 choices based on what security options are available.
1eb0bd8adf39 sslutil: add docstring to wrapsocket()
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diff changeset
156
1eb0bd8adf39 sslutil: add docstring to wrapsocket()
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diff changeset
157 In addition to the arguments supported by ``ssl.wrap_socket``, we allow
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diff changeset
158 the following additional arguments:
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159
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parents: 28652
diff changeset
160 * serverhostname - The expected hostname of the remote server. If the
1eb0bd8adf39 sslutil: add docstring to wrapsocket()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28652
diff changeset
161 server (and client) support SNI, this tells the server which certificate
1eb0bd8adf39 sslutil: add docstring to wrapsocket()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28652
diff changeset
162 to use.
1eb0bd8adf39 sslutil: add docstring to wrapsocket()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28652
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163 """
29224
7424f4294199 sslutil: require serverhostname argument (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29115
diff changeset
164 if not serverhostname:
7424f4294199 sslutil: require serverhostname argument (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29115
diff changeset
165 raise error.Abort('serverhostname argument is required')
7424f4294199 sslutil: require serverhostname argument (API)
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parents: 29115
diff changeset
166
29249
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diff changeset
167 cert_reqs, ca_certs = _determinecertoptions(ui, serverhostname)
cca59ef27e60 sslutil: move sslkwargs logic into internal function (API)
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parents: 29248
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168
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169 # Despite its name, PROTOCOL_SSLv23 selects the highest protocol
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
170 # that both ends support, including TLS protocols. On legacy stacks,
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parents: 28651
diff changeset
171 # the highest it likely goes in TLS 1.0. On modern stacks, it can
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
172 # support TLS 1.2.
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
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173 #
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174 # The PROTOCOL_TLSv* constants select a specific TLS version
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parents: 28651
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175 # only (as opposed to multiple versions). So the method for
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
176 # supporting multiple TLS versions is to use PROTOCOL_SSLv23 and
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
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177 # disable protocols via SSLContext.options and OP_NO_* constants.
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parents: 28651
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178 # However, SSLContext.options doesn't work unless we have the
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
179 # full/real SSLContext available to us.
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
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180 #
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181 # SSLv2 and SSLv3 are broken. We ban them outright.
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
182 if modernssl:
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
183 protocol = ssl.PROTOCOL_SSLv23
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
184 else:
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
185 protocol = ssl.PROTOCOL_TLSv1
28651
4827d07073e6 sslutil: always use SSLContext
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parents: 28650
diff changeset
186
28652
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diff changeset
187 # TODO use ssl.create_default_context() on modernssl.
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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diff changeset
188 sslcontext = SSLContext(protocol)
28651
4827d07073e6 sslutil: always use SSLContext
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28650
diff changeset
189
28652
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diff changeset
190 # This is a no-op on old Python.
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
191 sslcontext.options |= OP_NO_SSLv2 | OP_NO_SSLv3
28651
4827d07073e6 sslutil: always use SSLContext
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28650
diff changeset
192
28848
e330db205b20 sslutil: move and document verify_mode assignment
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28653
diff changeset
193 # This still works on our fake SSLContext.
e330db205b20 sslutil: move and document verify_mode assignment
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diff changeset
194 sslcontext.verify_mode = cert_reqs
e330db205b20 sslutil: move and document verify_mode assignment
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28653
diff changeset
195
28652
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Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
196 if certfile is not None:
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
197 def password():
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
198 f = keyfile or certfile
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
199 return ui.getpass(_('passphrase for %s: ') % f, '')
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
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parents: 28651
diff changeset
200 sslcontext.load_cert_chain(certfile, keyfile, password)
28848
e330db205b20 sslutil: move and document verify_mode assignment
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28653
diff changeset
201
28652
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
202 if ca_certs is not None:
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
203 sslcontext.load_verify_locations(cafile=ca_certs)
29113
5b9577edf745 sslutil: use CA loaded state to drive validation logic
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29112
diff changeset
204 caloaded = True
28652
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
205 else:
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
206 # This is a no-op on old Python.
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
207 sslcontext.load_default_certs()
29113
5b9577edf745 sslutil: use CA loaded state to drive validation logic
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29112
diff changeset
208 caloaded = _canloaddefaultcerts
23834
bf07c19b4c82 https: support tls sni (server name indication) for https urls (issue3090)
Alex Orange <crazycasta@gmail.com>
parents: 23069
diff changeset
209
28652
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
210 sslsocket = sslcontext.wrap_socket(sock, server_hostname=serverhostname)
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
211 # check if wrap_socket failed silently because socket had been
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
212 # closed
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
213 # - see http://bugs.python.org/issue13721
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parents: 28651
diff changeset
214 if not sslsocket.cipher():
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28651
diff changeset
215 raise error.Abort(_('ssl connection failed'))
29113
5b9577edf745 sslutil: use CA loaded state to drive validation logic
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29112
diff changeset
216
29225
b115eed11780 sslutil: use a dict for hanging hg state off the wrapped socket
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29224
diff changeset
217 sslsocket._hgstate = {
b115eed11780 sslutil: use a dict for hanging hg state off the wrapped socket
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29224
diff changeset
218 'caloaded': caloaded,
29226
33006bd6a1d7 sslutil: store and use hostname and ui in socket instance
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29225
diff changeset
219 'hostname': serverhostname,
33006bd6a1d7 sslutil: store and use hostname and ui in socket instance
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29225
diff changeset
220 'ui': ui,
29225
b115eed11780 sslutil: use a dict for hanging hg state off the wrapped socket
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29224
diff changeset
221 }
29113
5b9577edf745 sslutil: use CA loaded state to drive validation logic
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29112
diff changeset
222
28652
c617614aefd2 sslutil: remove indentation in wrapsocket declaration
Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
223 return sslsocket
14204
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
224
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
225 def _verifycert(cert, hostname):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
226 '''Verify that cert (in socket.getpeercert() format) matches hostname.
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
227 CRLs is not handled.
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
228
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
229 Returns error message if any problems are found and None on success.
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
230 '''
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
231 if not cert:
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
232 return _('no certificate received')
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
233 dnsname = hostname.lower()
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
234 def matchdnsname(certname):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
235 return (certname == dnsname or
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
236 '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1])
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
237
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
238 san = cert.get('subjectAltName', [])
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
239 if san:
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
240 certnames = [value.lower() for key, value in san if key == 'DNS']
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
241 for name in certnames:
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
242 if matchdnsname(name):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
243 return None
14666
27b080aa880a sslutil: fall back to commonName when no dNSName in subjectAltName (issue2798)
Nicolas Bareil <nico@chdir.org>
parents: 14616
diff changeset
244 if certnames:
27b080aa880a sslutil: fall back to commonName when no dNSName in subjectAltName (issue2798)
Nicolas Bareil <nico@chdir.org>
parents: 14616
diff changeset
245 return _('certificate is for %s') % ', '.join(certnames)
14204
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
246
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
247 # subject is only checked when subjectAltName is empty
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
248 for s in cert.get('subject', []):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
249 key, value = s[0]
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
250 if key == 'commonName':
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
251 try:
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
252 # 'subject' entries are unicode
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
253 certname = value.lower().encode('ascii')
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
254 except UnicodeEncodeError:
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
255 return _('IDN in certificate not supported')
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
256 if matchdnsname(certname):
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
257 return None
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
258 return _('certificate is for %s') % certname
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
259 return _('no commonName or subjectAltName found in certificate')
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
260
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
261
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
262 # CERT_REQUIRED means fetch the cert from the server all the time AND
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
263 # validate it against the CA store provided in web.cacerts.
5fa21960b2f4 sslutil: extracted ssl methods from httpsconnection in url.py
Augie Fackler <durin42@gmail.com>
parents:
diff changeset
264
23042
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
265 def _plainapplepython():
2cd3fa4412dc ssl: only use the dummy cert hack if using an Apple Python (issue4410)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
266 """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)
Mads Kiilerich <madski@unity3d.com>
parents: 22575
diff changeset
267 * is unfrozen and presumably has the whole mercurial module in the file
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268 system
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269 * presumably is an Apple Python that uses Apple OpenSSL which has patches
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270 for using system certificate store CAs in addition to the provided
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271 cacerts file
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272 """
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273 if sys.platform != 'darwin' or util.mainfrozen() or not sys.executable:
23042
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274 return False
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275 exe = os.path.realpath(sys.executable).lower()
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276 return (exe.startswith('/usr/bin/python') or
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277 exe.startswith('/system/library/frameworks/python.framework/'))
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278
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279 def _defaultcacerts():
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280 """return path to default CA certificates or None."""
24288
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281 if _plainapplepython():
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282 dummycert = os.path.join(os.path.dirname(__file__), 'dummycert.pem')
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283 if os.path.exists(dummycert):
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284 return dummycert
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285
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286 return None
24288
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287
29227
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288 def validatesocket(sock, strict=False):
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289 """Validate a socket meets security requiremnets.
14204
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parents:
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290
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291 The passed socket must have been created with ``wrapsocket()``.
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292 """
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293 host = sock._hgstate['hostname']
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294 ui = sock._hgstate['ui']
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93b03a222c3e sslutil: try harder to avoid getpeercert problems
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295
29227
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296 try:
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297 peercert = sock.getpeercert(True)
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298 peercert2 = sock.getpeercert()
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299 except AttributeError:
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300 raise error.Abort(_('%s ssl connection error') % host)
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301
29227
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302 if not peercert:
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303 raise error.Abort(_('%s certificate error: '
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304 'no certificate received') % host)
28850
3819c349b194 sslutil: document and slightly refactor validation logic
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305
29227
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306 # If a certificate fingerprint is pinned, use it and only it to
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307 # validate the remote cert.
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308 hostfingerprints = ui.configlist('hostfingerprints', host)
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309 peerfingerprint = util.sha1(peercert).hexdigest()
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310 nicefingerprint = ":".join([peerfingerprint[x:x + 2]
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diff changeset
311 for x in xrange(0, len(peerfingerprint), 2)])
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diff changeset
312 if hostfingerprints:
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diff changeset
313 fingerprintmatch = False
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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diff changeset
314 for hostfingerprint in hostfingerprints:
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diff changeset
315 if peerfingerprint.lower() == \
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diff changeset
316 hostfingerprint.replace(':', '').lower():
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diff changeset
317 fingerprintmatch = True
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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parents: 29226
diff changeset
318 break
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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parents: 29226
diff changeset
319 if not fingerprintmatch:
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diff changeset
320 raise error.Abort(_('certificate for %s has unexpected '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
321 'fingerprint %s') % (host, nicefingerprint),
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
322 hint=_('check hostfingerprint configuration'))
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
323 ui.debug('%s certificate matched fingerprint %s\n' %
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
324 (host, nicefingerprint))
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
325 return
28850
3819c349b194 sslutil: document and slightly refactor validation logic
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parents: 28849
diff changeset
326
29227
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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diff changeset
327 # If insecure connections were explicitly requested via --insecure,
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parents: 29226
diff changeset
328 # print a warning and do no verification.
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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parents: 29226
diff changeset
329 #
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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diff changeset
330 # It may seem odd that this is checked *after* host fingerprint pinning.
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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parents: 29226
diff changeset
331 # This is for backwards compatibility (for now). The message is also
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
332 # the same as below for BC.
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
333 if ui.insecureconnections:
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
334 ui.warn(_('warning: %s certificate with fingerprint %s not '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
335 'verified (check hostfingerprints or web.cacerts '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
336 'config setting)\n') %
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
337 (host, nicefingerprint))
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
338 return
29112
5edc5acecc83 sslutil: handle ui.insecureconnections in validator
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29111
diff changeset
339
29227
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
340 if not sock._hgstate['caloaded']:
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
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parents: 29226
diff changeset
341 if strict:
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
342 raise error.Abort(_('%s certificate with fingerprint %s not '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
343 'verified') % (host, nicefingerprint),
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
344 hint=_('check hostfingerprints or '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
345 'web.cacerts config setting'))
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
346 else:
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
347 ui.warn(_('warning: %s certificate with fingerprint %s '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
348 'not verified (check hostfingerprints or '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
349 'web.cacerts config setting)\n') %
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
350 (host, nicefingerprint))
29113
5b9577edf745 sslutil: use CA loaded state to drive validation logic
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29112
diff changeset
351
29227
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
352 return
29113
5b9577edf745 sslutil: use CA loaded state to drive validation logic
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29112
diff changeset
353
29227
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
354 msg = _verifycert(peercert2, host)
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
355 if msg:
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
356 raise error.Abort(_('%s certificate error: %s') % (host, msg),
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
357 hint=_('configure hostfingerprint %s or use '
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
358 '--insecure to connect insecurely') %
dffe78d80a6c sslutil: convert socket validation from a class to a function (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 29226
diff changeset
359 nicefingerprint)