Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/boto/https_connection.py @ 3:758bc20232e8 draft

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
children
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1 # Copyright 2007,2011 Google Inc.
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2 #
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3 # Licensed under the Apache License, Version 2.0 (the "License");
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4 # you may not use this file except in compliance with the License.
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5 # You may obtain a copy of the License at
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6 #
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7 # http://www.apache.org/licenses/LICENSE-2.0
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8 #
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9 # Unless required by applicable law or agreed to in writing, software
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10 # distributed under the License is distributed on an "AS IS" BASIS,
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11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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12 # See the License for the specific language governing permissions and
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13 # limitations under the License.
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14 #
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15
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16 # This file is derived from
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17 # http://googleappengine.googlecode.com/svn-history/r136/trunk/python/google/appengine/tools/https_wrapper.py
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18
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19
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20 """Extensions to allow HTTPS requests with SSL certificate validation."""
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21
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22 import re
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23 import socket
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24 import ssl
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25
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26 import boto
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27
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28 from boto.compat import six, http_client
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29
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30
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31 class InvalidCertificateException(http_client.HTTPException):
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32 """Raised when a certificate is provided with an invalid hostname."""
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33
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34 def __init__(self, host, cert, reason):
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35 """Constructor.
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36
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37 Args:
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38 host: The hostname the connection was made to.
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39 cert: The SSL certificate (as a dictionary) the host returned.
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40 """
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41 http_client.HTTPException.__init__(self)
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42 self.host = host
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43 self.cert = cert
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44 self.reason = reason
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45
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46 def __str__(self):
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47 return ('Host %s returned an invalid certificate (%s): %s' %
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48 (self.host, self.reason, self.cert))
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49
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50
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51 def GetValidHostsForCert(cert):
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52 """Returns a list of valid host globs for an SSL certificate.
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53
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54 Args:
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55 cert: A dictionary representing an SSL certificate.
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56 Returns:
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57 list: A list of valid host globs.
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58 """
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59 if 'subjectAltName' in cert:
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60 return [x[1] for x in cert['subjectAltName'] if x[0].lower() == 'dns']
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61 else:
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62 return [x[0][1] for x in cert['subject']
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63 if x[0][0].lower() == 'commonname']
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64
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65
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66 def ValidateCertificateHostname(cert, hostname):
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67 """Validates that a given hostname is valid for an SSL certificate.
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68
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69 Args:
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70 cert: A dictionary representing an SSL certificate.
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71 hostname: The hostname to test.
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72 Returns:
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73 bool: Whether or not the hostname is valid for this certificate.
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74 """
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75 hosts = GetValidHostsForCert(cert)
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76 boto.log.debug(
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77 "validating server certificate: hostname=%s, certificate hosts=%s",
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78 hostname, hosts)
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79 for host in hosts:
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80 host_re = host.replace('.', '\.').replace('*', '[^.]*')
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81 if re.search('^%s$' % (host_re,), hostname, re.I):
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82 return True
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83 return False
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84
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85
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86 class CertValidatingHTTPSConnection(http_client.HTTPConnection):
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87 """An HTTPConnection that connects over SSL and validates certificates."""
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88
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89 default_port = http_client.HTTPS_PORT
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90
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91 def __init__(self, host, port=default_port, key_file=None, cert_file=None,
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92 ca_certs=None, strict=None, **kwargs):
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93 """Constructor.
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94
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95 Args:
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96 host: The hostname. Can be in 'host:port' form.
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97 port: The port. Defaults to 443.
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98 key_file: A file containing the client's private key
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99 cert_file: A file containing the client's certificates
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100 ca_certs: A file contianing a set of concatenated certificate authority
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101 certs for validating the server against.
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102 strict: When true, causes BadStatusLine to be raised if the status line
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103 can't be parsed as a valid HTTP/1.0 or 1.1 status line.
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104 """
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105 if six.PY2:
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106 # Python 3.2 and newer have deprecated and removed the strict
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107 # parameter. Since the params are supported as keyword arguments
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108 # we conditionally add it here.
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109 kwargs['strict'] = strict
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110
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111 http_client.HTTPConnection.__init__(self, host=host, port=port, **kwargs)
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112 self.key_file = key_file
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113 self.cert_file = cert_file
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114 self.ca_certs = ca_certs
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115
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116 def connect(self):
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117 "Connect to a host on a given (SSL) port."
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118 if hasattr(self, "timeout"):
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119 sock = socket.create_connection((self.host, self.port), self.timeout)
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120 else:
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121 sock = socket.create_connection((self.host, self.port))
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122 msg = "wrapping ssl socket; "
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123 if self.ca_certs:
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124 msg += "CA certificate file=%s" % self.ca_certs
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125 else:
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126 msg += "using system provided SSL certs"
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127 boto.log.debug(msg)
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128 self.sock = ssl.wrap_socket(sock, keyfile=self.key_file,
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129 certfile=self.cert_file,
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130 cert_reqs=ssl.CERT_REQUIRED,
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131 ca_certs=self.ca_certs)
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132 cert = self.sock.getpeercert()
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133 hostname = self.host.split(':', 0)[0]
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134 if not ValidateCertificateHostname(cert, hostname):
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135 raise InvalidCertificateException(hostname,
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136 cert,
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137 'remote hostname "%s" does not match '
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138 'certificate' % hostname)