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require 'openssl'
require 'puppet'
require 'puppet/sslcertificates'
require 'xmlrpc/server'
# Much of this was taken from QuickCert:
# http://segment7.net/projects/ruby/QuickCert/
class Puppet::Network::Handler
class CA < Handler
attr_reader :ca
desc "Provides an interface for signing CSRs. Accepts a CSR and returns
the CA certificate and the signed certificate, or returns nil if
the cert is not signed."
@interface = XMLRPC::Service::Interface.new("puppetca") { |iface|
iface.add_method("array getcert(csr)")
}
def autosign
if defined?(@autosign)
@autosign
else
Puppet[:autosign]
end
end
# FIXME autosign? should probably accept both hostnames and IP addresses
def autosign?(hostname)
# simple values are easy
if autosign == true or autosign == false
return autosign
end
# we only otherwise know how to handle files
unless autosign =~ /^\//
raise Puppet::Error, "Invalid autosign value %s" % autosign.inspect
end
unless FileTest.exists?(autosign)
unless defined?(@@warnedonautosign)
@@warnedonautosign = true
Puppet.info "Autosign is enabled but %s is missing" % autosign
end
return false
end
auth = Puppet::Network::AuthStore.new
File.open(autosign) { |f|
f.each { |line|
next if line =~ /^\s*#/
next if line =~ /^\s*$/
auth.allow(line.chomp)
}
}
# for now, just cheat and pass a fake IP address to allowed?
return auth.allowed?(hostname, "127.1.1.1")
end
def initialize(hash = {})
Puppet.settings.use(:main, :ssl, :ca)
if hash.include? :autosign
@autosign = hash[:autosign]
end
@ca = Puppet::SSLCertificates::CA.new(hash)
end
# our client sends us a csr, and we either store it for later signing,
# or we sign it right away
def getcert(csrtext, client = nil, clientip = nil)
csr = OpenSSL::X509::Request.new(csrtext)
# Use the hostname from the CSR, not from the network.
subject = csr.subject
nameary = subject.to_a.find { |ary|
ary[0] == "CN"
}
if nameary.nil?
Puppet.err(
"Invalid certificate request: could not retrieve server name"
)
return "invalid"
end
hostname = nameary[1]
unless @ca
Puppet.notice "Host %s asked for signing from non-CA master" % hostname
return ""
end
# We used to save the public key, but it's basically unnecessary
# and it mucks with the permissions requirements.
# save_pk(hostname, csr.public_key)
certfile = File.join(Puppet[:certdir], [hostname, "pem"].join("."))
# first check to see if we already have a signed cert for the host
cert, cacert = ca.getclientcert(hostname)
if cert and cacert
Puppet.info "Retrieving existing certificate for %s" % hostname
unless csr.public_key.to_s == cert.public_key.to_s
raise Puppet::Error, "Certificate request does not match existing certificate; run 'puppetca --clean %s'." % hostname
end
return [cert.to_pem, cacert.to_pem]
elsif @ca
if self.autosign?(hostname) or client.nil?
if client.nil?
Puppet.info "Signing certificate for CA server"
end
# okay, we don't have a signed cert
# if we're a CA and autosign is turned on, then go ahead and sign
# the csr and return the results
Puppet.info "Signing certificate for %s" % hostname
cert, cacert = @ca.sign(csr)
#Puppet.info "Cert: %s; Cacert: %s" % [cert.class, cacert.class]
return [cert.to_pem, cacert.to_pem]
else # just write out the csr for later signing
if @ca.getclientcsr(hostname)
Puppet.info "Not replacing existing request from %s" % hostname
else
Puppet.notice "Host %s has a waiting certificate request" % hostname
@ca.storeclientcsr(csr)
end
return ["", ""]
end
else
raise "huh?"
end
end
private
# Save the public key.
def save_pk(hostname, public_key)
pkeyfile = File.join(Puppet[:publickeydir], [hostname, "pem"].join('.'))
if FileTest.exists?(pkeyfile)
currentkey = File.open(pkeyfile) { |k| k.read }
unless currentkey == public_key.to_s
raise Puppet::Error, "public keys for %s differ" % hostname
end
else
File.open(pkeyfile, "w", 0644) { |f|
f.print public_key.to_s
}
end
end
end
end
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