Mercurial > hg
annotate mercurial/sslutil.py @ 26286:4b685712fa45
bookmark: do not crash when active bookmark is forward and --date is used
The logic that decides where to update according to the active bookmark
location (when not on ".") was setting the rev to update to before we process
--date. This lead to --date processing aborting because of duplicated
specification.
We reorder the two pieces of code and add a test for this.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 17 Sep 2015 16:08:10 -0700 |
parents | 696f6e2be282 |
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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 util |
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18 |
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19 _canloaddefaultcerts = False |
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20 try: |
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21 ssl_context = ssl.SSLContext |
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22 _canloaddefaultcerts = util.safehasattr(ssl_context, 'load_default_certs') |
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23 |
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24 def wrapsocket(sock, keyfile, certfile, ui, cert_reqs=ssl.CERT_NONE, |
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25 ca_certs=None, serverhostname=None): |
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26 # Allow any version of SSL starting with TLSv1 and |
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27 # up. Note that specifying TLSv1 here prohibits use of |
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28 # newer standards (like TLSv1_2), so this is the right way |
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29 # to do this. Note that in the future it'd be better to |
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30 # support using ssl.create_default_context(), which sets |
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31 # up a bunch of things in smart ways (strong ciphers, |
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32 # protocol versions, etc) and is upgraded by Python |
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33 # maintainers for us, but that breaks too many things to |
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34 # do it in a hurry. |
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35 sslcontext = ssl.SSLContext(ssl.PROTOCOL_SSLv23) |
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36 sslcontext.options &= ssl.OP_NO_SSLv2 & ssl.OP_NO_SSLv3 |
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37 if certfile is not None: |
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38 def password(): |
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39 f = keyfile or certfile |
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40 return ui.getpass(_('passphrase for %s: ') % f, '') |
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41 sslcontext.load_cert_chain(certfile, keyfile, password) |
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42 sslcontext.verify_mode = cert_reqs |
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43 if ca_certs is not None: |
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44 sslcontext.load_verify_locations(cafile=ca_certs) |
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45 elif _canloaddefaultcerts: |
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46 sslcontext.load_default_certs() |
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47 |
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48 sslsocket = sslcontext.wrap_socket(sock, server_hostname=serverhostname) |
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49 # check if wrap_socket failed silently because socket had been |
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50 # closed |
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51 # - see http://bugs.python.org/issue13721 |
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52 if not sslsocket.cipher(): |
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53 raise util.Abort(_('ssl connection failed')) |
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54 return sslsocket |
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55 except AttributeError: |
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56 def wrapsocket(sock, keyfile, certfile, ui, cert_reqs=ssl.CERT_NONE, |
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57 ca_certs=None, serverhostname=None): |
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58 sslsocket = ssl.wrap_socket(sock, keyfile, certfile, |
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59 cert_reqs=cert_reqs, ca_certs=ca_certs, |
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60 ssl_version=ssl.PROTOCOL_TLSv1) |
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61 # check if wrap_socket failed silently because socket had been |
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62 # closed |
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63 # - see http://bugs.python.org/issue13721 |
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64 if not sslsocket.cipher(): |
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65 raise util.Abort(_('ssl connection failed')) |
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66 return sslsocket |
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67 |
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68 def _verifycert(cert, hostname): |
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69 '''Verify that cert (in socket.getpeercert() format) matches hostname. |
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70 CRLs is not handled. |
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71 |
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72 Returns error message if any problems are found and None on success. |
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73 ''' |
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74 if not cert: |
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75 return _('no certificate received') |
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76 dnsname = hostname.lower() |
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77 def matchdnsname(certname): |
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78 return (certname == dnsname or |
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79 '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1]) |
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80 |
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81 san = cert.get('subjectAltName', []) |
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82 if san: |
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83 certnames = [value.lower() for key, value in san if key == 'DNS'] |
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84 for name in certnames: |
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85 if matchdnsname(name): |
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86 return None |
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87 if certnames: |
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88 return _('certificate is for %s') % ', '.join(certnames) |
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89 |
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90 # subject is only checked when subjectAltName is empty |
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91 for s in cert.get('subject', []): |
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92 key, value = s[0] |
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93 if key == 'commonName': |
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94 try: |
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95 # 'subject' entries are unicode |
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96 certname = value.lower().encode('ascii') |
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97 except UnicodeEncodeError: |
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98 return _('IDN in certificate not supported') |
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99 if matchdnsname(certname): |
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100 return None |
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101 return _('certificate is for %s') % certname |
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102 return _('no commonName or subjectAltName found in certificate') |
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103 |
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104 |
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105 # CERT_REQUIRED means fetch the cert from the server all the time AND |
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106 # validate it against the CA store provided in web.cacerts. |
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107 |
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108 def _plainapplepython(): |
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109 """return true if this seems to be a pure Apple Python that |
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110 * is unfrozen and presumably has the whole mercurial module in the file |
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111 system |
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112 * presumably is an Apple Python that uses Apple OpenSSL which has patches |
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113 for using system certificate store CAs in addition to the provided |
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114 cacerts file |
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115 """ |
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116 if sys.platform != 'darwin' or util.mainfrozen() or not sys.executable: |
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117 return False |
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118 exe = os.path.realpath(sys.executable).lower() |
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119 return (exe.startswith('/usr/bin/python') or |
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120 exe.startswith('/system/library/frameworks/python.framework/')) |
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121 |
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122 def _defaultcacerts(): |
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123 """return path to CA certificates; None for system's store; ! to disable""" |
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124 if _plainapplepython(): |
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125 dummycert = os.path.join(os.path.dirname(__file__), 'dummycert.pem') |
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126 if os.path.exists(dummycert): |
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127 return dummycert |
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128 if _canloaddefaultcerts: |
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129 return None |
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130 return '!' |
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131 |
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132 def sslkwargs(ui, host): |
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133 kws = {'ui': ui} |
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134 hostfingerprint = ui.config('hostfingerprints', host) |
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135 if hostfingerprint: |
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136 return kws |
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137 cacerts = ui.config('web', 'cacerts') |
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138 if cacerts == '!': |
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139 pass |
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140 elif cacerts: |
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141 cacerts = util.expandpath(cacerts) |
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142 if not os.path.exists(cacerts): |
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143 raise util.Abort(_('could not find web.cacerts: %s') % cacerts) |
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144 else: |
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145 cacerts = _defaultcacerts() |
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146 if cacerts and cacerts != '!': |
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147 ui.debug('using %s to enable OS X system CA\n' % cacerts) |
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148 ui.setconfig('web', 'cacerts', cacerts, 'defaultcacerts') |
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149 if cacerts != '!': |
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150 kws.update({'ca_certs': cacerts, |
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151 'cert_reqs': ssl.CERT_REQUIRED, |
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152 }) |
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153 return kws |
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154 |
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155 class validator(object): |
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156 def __init__(self, ui, host): |
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157 self.ui = ui |
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158 self.host = host |
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159 |
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160 def __call__(self, sock, strict=False): |
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161 host = self.host |
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162 cacerts = self.ui.config('web', 'cacerts') |
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163 hostfingerprint = self.ui.config('hostfingerprints', host) |
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164 |
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165 if not sock.cipher(): # work around http://bugs.python.org/issue13721 |
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166 raise util.Abort(_('%s ssl connection error') % host) |
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167 try: |
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168 peercert = sock.getpeercert(True) |
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169 peercert2 = sock.getpeercert() |
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170 except AttributeError: |
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171 raise util.Abort(_('%s ssl connection error') % host) |
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172 |
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173 if not peercert: |
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174 raise util.Abort(_('%s certificate error: ' |
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175 'no certificate received') % host) |
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176 peerfingerprint = util.sha1(peercert).hexdigest() |
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177 nicefingerprint = ":".join([peerfingerprint[x:x + 2] |
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178 for x in xrange(0, len(peerfingerprint), 2)]) |
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179 if hostfingerprint: |
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180 if peerfingerprint.lower() != \ |
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181 hostfingerprint.replace(':', '').lower(): |
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182 raise util.Abort(_('certificate for %s has unexpected ' |
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183 'fingerprint %s') % (host, nicefingerprint), |
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184 hint=_('check hostfingerprint configuration')) |
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185 self.ui.debug('%s certificate matched fingerprint %s\n' % |
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186 (host, nicefingerprint)) |
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187 elif cacerts != '!': |
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188 msg = _verifycert(peercert2, host) |
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189 if msg: |
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190 raise util.Abort(_('%s certificate error: %s') % (host, msg), |
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191 hint=_('configure hostfingerprint %s or use ' |
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192 '--insecure to connect insecurely') % |
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193 nicefingerprint) |
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194 self.ui.debug('%s certificate successfully verified\n' % host) |
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195 elif strict: |
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196 raise util.Abort(_('%s certificate with fingerprint %s not ' |
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197 'verified') % (host, nicefingerprint), |
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198 hint=_('check hostfingerprints or web.cacerts ' |
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199 'config setting')) |
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200 else: |
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201 self.ui.warn(_('warning: %s certificate with fingerprint %s not ' |
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202 'verified (check hostfingerprints or web.cacerts ' |
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203 'config setting)\n') % |
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204 (host, nicefingerprint)) |