Mercurial > libervia-backend

annotate sat/tools/common/tls.py @ 3942:a92eef737703

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plugin XEP-0373: download public keys if they are not found in local storage: public keys were only obtained from PEP notifications, however this wasn't working if the entity was not in our roster. Now if no public key is retrieved from local storage, the public key node is requested, and an error is raised if nothing is found. This allows the use of OX with entities which are not in roster. rel 380
author Goffi <goffi@goffi.org>
date Sat, 15 Oct 2022 20:38:33 +0200
parents 7550ae9cfbac
children 524856bd7b19
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1 #!/usr/bin/env python3
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2
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3 # Libervia: an XMPP client
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4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 """TLS handling with twisted"""
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20
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21 from sat.core.log import getLogger
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22 from sat.core import exceptions
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23 from sat.tools import config as tools_config
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26 try:
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27 import OpenSSL
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28 from twisted.internet import ssl
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29 except ImportError:
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30 ssl = None
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33 log = getLogger(__name__)
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36 def getOptionsFromConfig(config, section=""):
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37 options = {}
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38 for option in ('tls_certificate', 'tls_private_key', 'tls_chain'):
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39 options[option] = tools_config.getConfig(config, section, option)
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40 return options
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43 def TLSOptionsCheck(options):
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44 """Check options coherence if TLS is activated, and update missing values
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45
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46 Must be called only if TLS is activated
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47 """
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48 if not options["tls_certificate"]:
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49 raise exceptions.ConfigError(
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50 "a TLS certificate is needed to activate HTTPS connection")
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51 if not options["tls_private_key"]:
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52 options["tls_private_key"] = options["tls_certificate"]
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53
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54
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55 def loadCertificates(f):
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56 """Read a .pem file with a list of certificates
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57
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58 @param f (file): file obj (opened .pem file)
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59 @return (list[OpenSSL.crypto.X509]): list of certificates
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60 @raise OpenSSL.crypto.Error: error while parsing the file
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61 """
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62 # XXX: didn't found any method to load a .pem file with several certificates
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63 # so the certificates split is done here
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64 certificates = []
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65 buf = []
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66 while True:
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67 line = f.readline()
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68 buf.append(line)
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69 if "-----END CERTIFICATE-----" in line:
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70 certificates.append(
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71 OpenSSL.crypto.load_certificate(
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72 OpenSSL.crypto.FILETYPE_PEM, "".join(buf)
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73 )
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74 )
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75 buf = []
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76 elif not line:
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77 log.debug(f"{len(certificates)} certificate(s) found")
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78 return certificates
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79
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80
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81 def loadPKey(f):
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82 """Read a private key from a .pem file
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83
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84 @param f (file): file obj (opened .pem file)
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85 @return (list[OpenSSL.crypto.PKey]): private key object
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86 @raise OpenSSL.crypto.Error: error while parsing the file
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87 """
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88 return OpenSSL.crypto.load_privatekey(OpenSSL.crypto.FILETYPE_PEM, f.read())
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89
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90
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91 def loadCertificate(f):
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92 """Read a public certificate from a .pem file
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93
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94 @param f (file): file obj (opened .pem file)
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95 @return (list[OpenSSL.crypto.X509]): public certificate
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96 @raise OpenSSL.crypto.Error: error while parsing the file
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97 """
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98 return OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, f.read())
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99
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100
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101 def getTLSContextFactory(options):
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102 """Load TLS certificate and build the context factory needed for listenSSL"""
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103 if ssl is None:
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104 raise ImportError("Python module pyOpenSSL is not installed!")
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105
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106 cert_options = {}
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107
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108 for name, option, method in [
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109 ("privateKey", "tls_private_key", loadPKey),
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110 ("certificate", "tls_certificate", loadCertificate),
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111 ("extraCertChain", "tls_chain", loadCertificates),
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112 ]:
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113 path = options[option]
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114 if not path:
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115 assert option == "tls_chain"
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
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116 continue
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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117 log.debug(f"loading {option} from {path}")
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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118 try:
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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119 with open(path) as f:
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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120 cert_options[name] = method(f)
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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121 except IOError as e:
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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122 raise exceptions.DataError(
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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123 f"Error while reading file {path} for option {option}: {e}"
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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124 )
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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125 except OpenSSL.crypto.Error:
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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126 raise exceptions.DataError(
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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127 f"Error while parsing file {path} for option {option}, are you sure "
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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128 f"it is a valid .pem file?"
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
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129 )
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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130 if (
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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131 option == "tls_private_key"
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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132 and options["tls_certificate"] == path
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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133 ):
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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134 raise exceptions.ConfigError(
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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135 f"You are using the same file for private key and public "
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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136 f"certificate, make sure that both a in {path} or use "
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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137 f"--tls_private_key option"
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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138 )
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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139
a4b8c9bcfb57 tools/common (tls): moved re-usable Twisted TLS code from Libervia to tools/common
Goffi <goffi@goffi.org>
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140 return ssl.CertificateOptions(**cert_options)