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#
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Christopher Brown (<cb@opscode.com>)
# Copyright:: Copyright (c) 2009 Opscode, 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/log'
require 'chef/config'
require 'chef/api_client'
require 'openssl'
require 'fileutils'
class Chef
class Certificate
class << self
# Generates a new CA Certificate and Key, and writes them out to
# Chef::Config[:signing_ca_cert] and Chef::Config[:signing_ca_key].
def generate_signing_ca
ca_cert_file = Chef::Config[:signing_ca_cert]
ca_keypair_file = Chef::Config[:signing_ca_key]
unless File.exists?(ca_cert_file) && File.exists?(ca_keypair_file)
Chef::Log.info("Creating new signing certificate")
[ ca_cert_file, ca_keypair_file ].each do |f|
ca_basedir = File.dirname(f)
FileUtils.mkdir_p ca_basedir
end
keypair = OpenSSL::PKey::RSA.generate(1024)
ca_cert = OpenSSL::X509::Certificate.new
ca_cert.version = 3
ca_cert.serial = 1
info = [
["C", Chef::Config[:signing_ca_country]],
["ST", Chef::Config[:signing_ca_state]],
["L", Chef::Config[:signing_ca_location]],
["O", Chef::Config[:signing_ca_org]],
["OU", "Certificate Service"],
["CN", "#{Chef::Config[:signing_ca_domain]}/emailAddress=#{Chef::Config[:signing_ca_email]}"]
]
ca_cert.subject = ca_cert.issuer = OpenSSL::X509::Name.new(info)
ca_cert.not_before = Time.now
ca_cert.not_after = Time.now + 10 * 365 * 24 * 60 * 60 # 10 years
ca_cert.public_key = keypair.public_key
ef = OpenSSL::X509::ExtensionFactory.new
ef.subject_certificate = ca_cert
ef.issuer_certificate = ca_cert
ca_cert.extensions = [
ef.create_extension("basicConstraints", "CA:TRUE", true),
ef.create_extension("subjectKeyIdentifier", "hash"),
ef.create_extension("keyUsage", "cRLSign,keyCertSign", true),
]
ca_cert.add_extension ef.create_extension("authorityKeyIdentifier", "keyid:always,issuer:always")
ca_cert.sign keypair, OpenSSL::Digest::SHA1.new
File.open(ca_cert_file, "w") { |f| f.write ca_cert.to_pem }
File.open(ca_keypair_file, File::WRONLY|File::EXCL|File::CREAT, 0600) { |f| f.write keypair.to_pem }
if (Chef::Config[:signing_ca_user] && Chef::Config[:signing_ca_group])
FileUtils.chown(Chef::Config[:signing_ca_user], Chef::Config[:signing_ca_group], ca_keypair_file)
end
end
self
end
# Creates a new key pair, and signs them with the signing certificate
# and key generated from generate_signing_ca above.
#
# @param [String] The common name for the key pair.
# @param [Optional String] The subject alternative name.
# @return [Object, Object] The public and private key objects.
def gen_keypair(common_name, subject_alternative_name = nil)
Chef::Log.info("Creating new key pair for #{common_name}")
# generate client keypair
client_keypair = OpenSSL::PKey::RSA.generate(2048)
client_cert = OpenSSL::X509::Certificate.new
ca_cert = OpenSSL::X509::Certificate.new(File.read(Chef::Config[:signing_ca_cert]))
info = [
["C", Chef::Config[:signing_ca_country]],
["ST", Chef::Config[:signing_ca_state]],
["L", Chef::Config[:signing_ca_location]],
["O", Chef::Config[:signing_ca_org]],
["OU", "Certificate Service"],
["CN", common_name ]
]
client_cert.subject = OpenSSL::X509::Name.new(info)
client_cert.issuer = ca_cert.subject
client_cert.not_before = Time.now
client_cert.not_after = Time.now + 10 * 365 * 24 * 60 * 60 # 10 years
client_cert.public_key = client_keypair.public_key
client_cert.serial = 1
client_cert.version = 3
ef = OpenSSL::X509::ExtensionFactory.new
ef.subject_certificate = client_cert
ef.issuer_certificate = ca_cert
client_cert.extensions = [
ef.create_extension("basicConstraints", "CA:FALSE", true),
ef.create_extension("subjectKeyIdentifier", "hash")
]
client_cert.add_extension ef.create_extension("subjectAltName", subject_alternative_name) if subject_alternative_name
client_cert.sign(OpenSSL::PKey::RSA.new(File.read(Chef::Config[:signing_ca_key])), OpenSSL::Digest::SHA1.new)
return client_cert.public_key, client_keypair
end
def gen_validation_key(name=Chef::Config[:validation_client_name], key_file=Chef::Config[:validation_key])
# Create the validation key
api_client = Chef::ApiClient.new
api_client.name(name)
api_client.admin(true)
begin
# If both the couch record and file exist, don't do anything. Otherwise,
# re-generate the validation key.
Chef::ApiClient.cdb_load(name)
# The couch document was loaded successfully if we got to here; if we
# can't also load the file on the filesystem, we'll regenerate it all.
File.open(key_file, "r") do |file|
end
rescue Chef::Exceptions::CouchDBNotFound
create_validation_key(api_client, key_file)
rescue
if $!.class.name =~ /Errno::/
Chef::Log.error("Error opening validation key: #{$!} -- destroying and regenerating")
begin
api_client.cdb_destroy
rescue Bunny::ServerDownError => e
# create_validation_key is gonna fail anyway, so let's just bail out.
Chef::Log.fatal("Could not de-index (to rabbitmq) previous validation key - rabbitmq is down! Start rabbitmq then restart chef-server to re-generate it")
raise
end
create_validation_key(api_client, key_file)
else
raise
end
end
end
private
def create_validation_key(api_client, key_file)
Chef::Log.info("Creating validation key...")
api_client.create_keys
begin
api_client.cdb_save
rescue Bunny::ServerDownError => e
# If rabbitmq is down, the client will have been saved in CouchDB,
# but not in the index.
Chef::Log.fatal("Could not index (to rabbitmq) validation key - rabbitmq is down! Start rabbitmq then restart chef-server to re-generate it")
# re-raise so the error bubbles out and nukes chef-server
raise e
end
key_dir = File.dirname(key_file)
FileUtils.mkdir_p(key_dir) unless File.directory?(key_dir)
File.open(key_file, File::WRONLY|File::CREAT, 0600) do |f|
f.print(api_client.private_key)
end
if (Chef::Config[:signing_ca_user] && Chef::Config[:signing_ca_group])
FileUtils.chown(Chef::Config[:signing_ca_user], Chef::Config[:signing_ca_group], key_file)
end
end
end
end
end
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