Mercurial > hg
annotate mercurial/sslutil.py @ 21269:fa601c4e03f9
merge: make debug output slightly more helpful by including message for action
Make recently introduced messages more useful. Instead of:
f1: g
f2: m
say:
f1: remote is newer -> g
f2: versions differ -> m
author | Mads Kiilerich <madski@unity3d.com> |
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date | Tue, 22 Apr 2014 02:09:24 +0200 |
parents | 3b82d412e9e8 |
children | a00a7951b20c |
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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 |
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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 try: |
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14 # avoid using deprecated/broken FakeSocket in python 2.6 |
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15 import ssl |
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16 CERT_REQUIRED = ssl.CERT_REQUIRED |
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17 PROTOCOL_SSLv23 = ssl.PROTOCOL_SSLv23 |
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18 PROTOCOL_TLSv1 = ssl.PROTOCOL_TLSv1 |
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19 def ssl_wrap_socket(sock, keyfile, certfile, ssl_version=PROTOCOL_TLSv1, |
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20 cert_reqs=ssl.CERT_NONE, ca_certs=None): |
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21 sslsocket = ssl.wrap_socket(sock, keyfile, certfile, |
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22 cert_reqs=cert_reqs, ca_certs=ca_certs, |
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23 ssl_version=ssl_version) |
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24 # check if wrap_socket failed silently because socket had been closed |
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25 # - see http://bugs.python.org/issue13721 |
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26 if not sslsocket.cipher(): |
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27 raise util.Abort(_('ssl connection failed')) |
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28 return sslsocket |
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29 except ImportError: |
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30 CERT_REQUIRED = 2 |
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31 |
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32 PROTOCOL_SSLv23 = 2 |
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33 PROTOCOL_TLSv1 = 3 |
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34 |
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35 import socket, httplib |
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36 |
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37 def ssl_wrap_socket(sock, keyfile, certfile, ssl_version=PROTOCOL_TLSv1, |
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38 cert_reqs=CERT_REQUIRED, ca_certs=None): |
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39 if not util.safehasattr(socket, 'ssl'): |
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40 raise util.Abort(_('Python SSL support not found')) |
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41 if ca_certs: |
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42 raise util.Abort(_( |
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43 'certificate checking requires Python 2.6')) |
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44 |
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45 ssl = socket.ssl(sock, keyfile, certfile) |
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46 return httplib.FakeSocket(sock, ssl) |
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47 |
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48 def _verifycert(cert, hostname): |
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49 '''Verify that cert (in socket.getpeercert() format) matches hostname. |
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50 CRLs is not handled. |
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51 |
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52 Returns error message if any problems are found and None on success. |
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53 ''' |
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54 if not cert: |
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55 return _('no certificate received') |
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56 dnsname = hostname.lower() |
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57 def matchdnsname(certname): |
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58 return (certname == dnsname or |
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59 '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1]) |
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60 |
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61 san = cert.get('subjectAltName', []) |
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62 if san: |
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63 certnames = [value.lower() for key, value in san if key == 'DNS'] |
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64 for name in certnames: |
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65 if matchdnsname(name): |
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66 return None |
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67 if certnames: |
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68 return _('certificate is for %s') % ', '.join(certnames) |
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69 |
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70 # subject is only checked when subjectAltName is empty |
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71 for s in cert.get('subject', []): |
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72 key, value = s[0] |
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73 if key == 'commonName': |
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74 try: |
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75 # 'subject' entries are unicode |
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76 certname = value.lower().encode('ascii') |
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77 except UnicodeEncodeError: |
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78 return _('IDN in certificate not supported') |
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79 if matchdnsname(certname): |
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80 return None |
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81 return _('certificate is for %s') % certname |
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82 return _('no commonName or subjectAltName found in certificate') |
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83 |
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84 |
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85 # CERT_REQUIRED means fetch the cert from the server all the time AND |
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86 # validate it against the CA store provided in web.cacerts. |
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87 # |
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88 # We COMPLETELY ignore CERT_REQUIRED on Python <= 2.5, as it's totally |
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89 # busted on those versions. |
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90 |
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91 def sslkwargs(ui, host): |
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92 cacerts = ui.config('web', 'cacerts') |
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93 forcetls = ui.configbool('ui', 'tls', default=True) |
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94 if forcetls: |
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95 ssl_version = PROTOCOL_TLSv1 |
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96 else: |
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97 ssl_version = PROTOCOL_SSLv23 |
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98 hostfingerprint = ui.config('hostfingerprints', host) |
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99 kws = {'ssl_version': ssl_version, |
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100 } |
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101 if cacerts and not hostfingerprint: |
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102 cacerts = util.expandpath(cacerts) |
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103 if not os.path.exists(cacerts): |
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104 raise util.Abort(_('could not find web.cacerts: %s') % cacerts) |
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105 kws.update({'ca_certs': cacerts, |
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106 'cert_reqs': CERT_REQUIRED, |
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107 }) |
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108 return kws |
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109 |
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110 class validator(object): |
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111 def __init__(self, ui, host): |
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112 self.ui = ui |
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113 self.host = host |
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114 |
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115 def __call__(self, sock, strict=False): |
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116 host = self.host |
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117 cacerts = self.ui.config('web', 'cacerts') |
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118 hostfingerprint = self.ui.config('hostfingerprints', host) |
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119 if not getattr(sock, 'getpeercert', False): # python 2.5 ? |
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120 if hostfingerprint: |
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121 raise util.Abort(_("host fingerprint for %s can't be " |
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122 "verified (Python too old)") % host) |
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123 if strict: |
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124 raise util.Abort(_("certificate for %s can't be verified " |
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125 "(Python too old)") % host) |
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126 if self.ui.configbool('ui', 'reportoldssl', True): |
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127 self.ui.warn(_("warning: certificate for %s can't be verified " |
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128 "(Python too old)\n") % host) |
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129 return |
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130 |
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131 if not sock.cipher(): # work around http://bugs.python.org/issue13721 |
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132 raise util.Abort(_('%s ssl connection error') % host) |
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133 try: |
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134 peercert = sock.getpeercert(True) |
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135 peercert2 = sock.getpeercert() |
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136 except AttributeError: |
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137 raise util.Abort(_('%s ssl connection error') % host) |
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138 |
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139 if not peercert: |
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140 raise util.Abort(_('%s certificate error: ' |
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141 'no certificate received') % host) |
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142 peerfingerprint = util.sha1(peercert).hexdigest() |
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143 nicefingerprint = ":".join([peerfingerprint[x:x + 2] |
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144 for x in xrange(0, len(peerfingerprint), 2)]) |
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145 if hostfingerprint: |
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146 if peerfingerprint.lower() != \ |
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147 hostfingerprint.replace(':', '').lower(): |
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148 raise util.Abort(_('certificate for %s has unexpected ' |
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149 'fingerprint %s') % (host, nicefingerprint), |
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150 hint=_('check hostfingerprint configuration')) |
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151 self.ui.debug('%s certificate matched fingerprint %s\n' % |
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152 (host, nicefingerprint)) |
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153 elif cacerts: |
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154 msg = _verifycert(peercert2, host) |
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155 if msg: |
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156 raise util.Abort(_('%s certificate error: %s') % (host, msg), |
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157 hint=_('configure hostfingerprint %s or use ' |
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158 '--insecure to connect insecurely') % |
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159 nicefingerprint) |
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160 self.ui.debug('%s certificate successfully verified\n' % host) |
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161 elif strict: |
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162 raise util.Abort(_('%s certificate with fingerprint %s not ' |
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163 'verified') % (host, nicefingerprint), |
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164 hint=_('check hostfingerprints or web.cacerts ' |
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165 'config setting')) |
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166 else: |
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167 self.ui.warn(_('warning: %s certificate with fingerprint %s not ' |
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168 'verified (check hostfingerprints or web.cacerts ' |
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169 'config setting)\n') % |
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170 (host, nicefingerprint)) |