/usr/lib/python3/dist-packages/certbot_apache/http_01.py is in python3-certbot-apache 0.28.0-1~deb9u1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | """A class that performs HTTP-01 challenges for Apache"""
import logging
import os
from acme.magic_typing import Set # pylint: disable=unused-import, no-name-in-module
from certbot import errors
from certbot.plugins import common
from certbot_apache.obj import VirtualHost # pylint: disable=unused-import
from certbot_apache.parser import get_aug_path
logger = logging.getLogger(__name__)
class ApacheHttp01(common.TLSSNI01):
"""Class that performs HTTP-01 challenges within the Apache configurator."""
CONFIG_TEMPLATE22_PRE = """\
RewriteEngine on
RewriteRule ^/\\.well-known/acme-challenge/([A-Za-z0-9-_=]+)$ {0}/$1 [L]
"""
CONFIG_TEMPLATE22_POST = """\
<Directory {0}>
Order Allow,Deny
Allow from all
</Directory>
<Location /.well-known/acme-challenge>
Order Allow,Deny
Allow from all
</Location>
"""
CONFIG_TEMPLATE24_PRE = """\
RewriteEngine on
RewriteRule ^/\\.well-known/acme-challenge/([A-Za-z0-9-_=]+)$ {0}/$1 [END]
"""
CONFIG_TEMPLATE24_POST = """\
<Directory {0}>
Require all granted
</Directory>
<Location /.well-known/acme-challenge>
Require all granted
</Location>
"""
def __init__(self, *args, **kwargs):
super(ApacheHttp01, self).__init__(*args, **kwargs)
self.challenge_conf_pre = os.path.join(
self.configurator.conf("challenge-location"),
"le_http_01_challenge_pre.conf")
self.challenge_conf_post = os.path.join(
self.configurator.conf("challenge-location"),
"le_http_01_challenge_post.conf")
self.challenge_dir = os.path.join(
self.configurator.config.work_dir,
"http_challenges")
self.moded_vhosts = set() # type: Set[VirtualHost]
def perform(self):
"""Perform all HTTP-01 challenges."""
if not self.achalls:
return []
# Save any changes to the configuration as a precaution
# About to make temporary changes to the config
self.configurator.save("Changes before challenge setup", True)
self.configurator.ensure_listen(str(
self.configurator.config.http01_port))
self.prepare_http01_modules()
responses = self._set_up_challenges()
self._mod_config()
# Save reversible changes
self.configurator.save("HTTP Challenge", True)
return responses
def prepare_http01_modules(self):
"""Make sure that we have the needed modules available for http01"""
if self.configurator.conf("handle-modules"):
needed_modules = ["rewrite"]
if self.configurator.version < (2, 4):
needed_modules.append("authz_host")
else:
needed_modules.append("authz_core")
for mod in needed_modules:
if mod + "_module" not in self.configurator.parser.modules:
self.configurator.enable_mod(mod, temp=True)
def _mod_config(self):
for chall in self.achalls:
vh = self.configurator.find_best_http_vhost(
chall.domain, filter_defaults=False,
port=str(self.configurator.config.http01_port))
if vh:
self._set_up_include_directives(vh)
else:
for vh in self._relevant_vhosts():
self._set_up_include_directives(vh)
self.configurator.reverter.register_file_creation(
True, self.challenge_conf_pre)
self.configurator.reverter.register_file_creation(
True, self.challenge_conf_post)
if self.configurator.version < (2, 4):
config_template_pre = self.CONFIG_TEMPLATE22_PRE
config_template_post = self.CONFIG_TEMPLATE22_POST
else:
config_template_pre = self.CONFIG_TEMPLATE24_PRE
config_template_post = self.CONFIG_TEMPLATE24_POST
config_text_pre = config_template_pre.format(self.challenge_dir)
config_text_post = config_template_post.format(self.challenge_dir)
logger.debug("writing a pre config file with text:\n %s", config_text_pre)
with open(self.challenge_conf_pre, "w") as new_conf:
new_conf.write(config_text_pre)
logger.debug("writing a post config file with text:\n %s", config_text_post)
with open(self.challenge_conf_post, "w") as new_conf:
new_conf.write(config_text_post)
def _relevant_vhosts(self):
http01_port = str(self.configurator.config.http01_port)
relevant_vhosts = []
for vhost in self.configurator.vhosts:
if any(a.is_wildcard() or a.get_port() == http01_port for a in vhost.addrs):
if not vhost.ssl:
relevant_vhosts.append(vhost)
if not relevant_vhosts:
raise errors.PluginError(
"Unable to find a virtual host listening on port {0} which is"
" currently needed for Certbot to prove to the CA that you"
" control your domain. Please add a virtual host for port"
" {0}.".format(http01_port))
return relevant_vhosts
def _set_up_challenges(self):
if not os.path.isdir(self.challenge_dir):
os.makedirs(self.challenge_dir)
os.chmod(self.challenge_dir, 0o755)
responses = []
for achall in self.achalls:
responses.append(self._set_up_challenge(achall))
return responses
def _set_up_challenge(self, achall):
response, validation = achall.response_and_validation()
name = os.path.join(self.challenge_dir, achall.chall.encode("token"))
self.configurator.reverter.register_file_creation(True, name)
with open(name, 'wb') as f:
f.write(validation.encode())
os.chmod(name, 0o644)
return response
def _set_up_include_directives(self, vhost):
"""Includes override configuration to the beginning and to the end of
VirtualHost. Note that this include isn't added to Augeas search tree"""
if vhost not in self.moded_vhosts:
logger.debug(
"Adding a temporary challenge validation Include for name: %s " +
"in: %s", vhost.name, vhost.filep)
self.configurator.parser.add_dir_beginning(
vhost.path, "Include", self.challenge_conf_pre)
self.configurator.parser.add_dir(
vhost.path, "Include", self.challenge_conf_post)
if not vhost.enabled:
self.configurator.parser.add_dir(
get_aug_path(self.configurator.parser.loc["default"]),
"Include", vhost.filep)
self.moded_vhosts.add(vhost)
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