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
|
#
# Author:: Daniel DeLeo (<dan@chef.io>)
# Copyright:: Copyright 2014-2016, Chef Software, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require "chef/knife"
require "chef/config"
class Chef
class Knife
class SslFetch < Chef::Knife
deps do
require "pp"
require "socket"
require "uri"
require "openssl"
require "chef/mixin/proxified_socket"
include Chef::Mixin::ProxifiedSocket
end
banner "knife ssl fetch [URL] (options)"
def initialize(*args)
super
@uri = nil
end
def uri
@uri ||= begin
Chef::Log.trace("Checking SSL cert on #{given_uri}")
URI.parse(given_uri)
end
end
def given_uri
(name_args[0] || Chef::Config.chef_server_url)
end
def host
uri.host
end
def port
uri.port
end
def validate_uri
unless host && port
invalid_uri!
end
rescue URI::Error
invalid_uri!
end
def invalid_uri!
ui.error("Given URI: `#{given_uri}' is invalid")
show_usage
exit 1
end
def remote_cert_chain
tcp_connection = proxified_socket(host, port)
shady_ssl_connection = OpenSSL::SSL::SSLSocket.new(tcp_connection, noverify_peer_ssl_context)
shady_ssl_connection.connect
shady_ssl_connection.peer_cert_chain
end
def noverify_peer_ssl_context
@noverify_peer_ssl_context ||= begin
noverify_peer_context = OpenSSL::SSL::SSLContext.new
noverify_peer_context.verify_mode = OpenSSL::SSL::VERIFY_NONE
noverify_peer_context
end
end
def cn_of(certificate)
subject = certificate.subject
if cn_field_tuple = subject.to_a.find { |field| field[0] == "CN" }
cn_field_tuple[1]
else
nil
end
end
# Convert the CN of a certificate into something that will work well as a
# filename. To do so, all `*` characters are converted to the string
# "wildcard" and then all characters other than alphanumeric and hypen
# characters are converted to underscores.
# NOTE: There is some confustion about what the CN will contain when
# using internationalized domain names. RFC 6125 mandates that the ascii
# representation be used, but it is not clear whether this is followed in
# practice.
# https://tools.ietf.org/html/rfc6125#section-6.4.2
def normalize_cn(cn)
cn.gsub("*", "wildcard").gsub(/[^[:alnum:]\-]/, "_")
end
def configuration
Chef::Config
end
def trusted_certs_dir
configuration.trusted_certs_dir
end
def write_cert(cert)
FileUtils.mkdir_p(trusted_certs_dir)
cn = cn_of(cert)
filename = cn.nil? ? "#{host}_#{Time.new.to_i}" : normalize_cn(cn)
full_path = File.join(trusted_certs_dir, "#{filename}.crt")
ui.msg("Adding certificate for #{filename} in #{full_path}")
File.open(full_path, File::CREAT | File::TRUNC | File::RDWR, 0644) do |f|
f.print(cert.to_s)
end
end
def run
validate_uri
ui.warn(<<-TRUST_TRUST)
Certificates from #{host} will be fetched and placed in your trusted_cert
directory (#{trusted_certs_dir}).
Knife has no means to verify these are the correct certificates. You should
verify the authenticity of these certificates after downloading.
TRUST_TRUST
remote_cert_chain.each do |cert|
write_cert(cert)
end
rescue OpenSSL::SSL::SSLError => e
# 'unknown protocol' usually means you tried to connect to a non-ssl
# service. We handle that specially here, any other error we let bubble
# up (probably a bug of some sort).
raise unless e.message.include?("unknown protocol")
ui.error("The service at the given URI (#{uri}) does not accept SSL connections")
if uri.scheme == "http"
https_uri = uri.to_s.sub(/^http/, "https")
ui.error("Perhaps you meant to connect to '#{https_uri}'?")
end
exit 1
end
end
end
end
|
