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|
require 'xmlrpc/server'
class Puppet::Network::Server
class ServletError < RuntimeError; end
class Servlet < XMLRPC::WEBrickServlet
ERR_UNAUTHORIZED = 30
attr_accessor :request
# this is just a duplicate of the normal method; it's here for
# debugging when i need it
def self.get_instance(server, *options)
self.new(server, *options)
end
# This is a hackish way to avoid an auth message every time we have a
# normal operation
def self.log(msg)
unless defined? @logs
@logs = {}
end
if @logs.include?(msg)
@logs[msg] += 1
else
Puppet.info msg
@logs[msg] = 1
end
end
def add_handler(interface, handler)
@loadedhandlers << interface.prefix
super
end
# Verify that our client has access. We allow untrusted access to
# puppetca methods but no others.
def authorize(request, method)
namespace = method.sub(/\..+/, '')
client = request.peeraddr[2]
if defined? @client and @client
client = @client
end
ip = request.peeraddr[3]
if request.client_cert
if @puppetserver.authconfig.exists?
allowed = @puppetserver.authconfig.allowed?(method, client, ip)
if allowed
Puppet.debug "Allowing %s(%s) trusted access to %s" %
[client, ip, method]
return true
else
Puppet.debug "Denying %s(%s) trusted access to %s" %
[client, ip, method]
return false
end
else
# This is pretty hackish, but...
# This means we can't actually test this method at this point.
# The next release of Puppet will almost definitely require
# this file to exist or will default to denying all access.
if Puppet.execname == "puppetmasterd" or defined? Test::Unit::TestCase
Puppet.debug "Allowing %s(%s) trusted access to %s" %
[client, ip, method]
return true
else
Puppet.debug "Denying %s(%s) trusted access to %s on %s" %
[client, ip, method, Puppet.execname]
return false
end
end
else
if method =~ /^puppetca\./
Puppet.notice "Allowing %s(%s) untrusted access to CA methods" %
[client, ip]
else
Puppet.err "Unauthenticated client %s(%s) cannot call %s" %
[client, ip, method]
return false
end
end
end
def available?(method)
namespace = method.sub(/\..+/, '')
client = request.peeraddr[2]
ip = request.peeraddr[3]
if @loadedhandlers.include?(namespace)
return true
else
Puppet.warning "Client %s(%s) requested unavailable functionality %s" %
[client, ip, namespace]
return false
end
end
def initialize(server, handlers)
@puppetserver = server
@notified = {}
# the servlet base class does not consume any arguments
# and its BasicServer base class only accepts a 'class_delim'
# option which won't change in Puppet at all
# thus, we don't need to pass any args to our base class,
# and we can consume them all ourselves
super()
@loadedhandlers = []
handlers.each { |handler|
#Puppet.debug "adding handler for %s" % handler.class
self.add_handler(handler.class.interface, handler)
}
# Initialize these to nil, but they will get set to values
# by the 'service' method. These have to instance variables
# because I don't have a clear line from the service method to
# the service hook.
@request = nil
@client = nil
@clientip = nil
self.set_service_hook { |obj, *args|
if @client and @clientip
args.push(@client, @clientip)
end
begin
obj.call(*args)
rescue XMLRPC::FaultException
raise
rescue Puppet::AuthorizationError => detail
#Puppet.warning obj.inspect
#Puppet.warning args.inspect
Puppet.err "Permission denied: %s" % detail.to_s
raise XMLRPC::FaultException.new(
1, detail.to_s
)
rescue Puppet::Error => detail
#Puppet.warning obj.inspect
#Puppet.warning args.inspect
if Puppet[:trace]
puts detail.backtrace
end
Puppet.err detail.to_s
error = XMLRPC::FaultException.new(
1, detail.to_s
)
error.set_backtrace detail.backtrace
raise error
rescue => detail
#Puppet.warning obj.inspect
#Puppet.warning args.inspect
if Puppet[:trace]
puts detail.backtrace
end
Puppet.err "Could not call: %s" % detail.to_s
error = XMLRPC::FaultException.new(1, detail.to_s)
error.set_backtrace detail.backtrace
raise error
end
}
end
# Handle the actual request. This does some basic collection of
# data, and then just calls the parent method.
def service(request, response)
@request = request
# The only way that @client can be nil is if the request is local.
if peer = request.peeraddr
@client = peer[2]
@clientip = peer[3]
else
raise XMLRPC::FaultException.new(
ERR_UNCAUGHT_EXCEPTION,
"Could not retrieve client information"
)
end
# If they have a certificate (which will almost always be true)
# then we get the hostname from the cert, instead of via IP
# info
if cert = request.client_cert
nameary = cert.subject.to_a.find { |ary|
ary[0] == "CN"
}
if nameary.nil?
Puppet.warning "Could not retrieve server name from cert"
else
unless @client == nameary[1]
Puppet.debug "Overriding %s with cert name %s" %
[@client, nameary[1]]
@client = nameary[1]
end
end
end
begin
super
rescue => detail
Puppet.err "Could not service request: %s: %s" %
[detail.class, detail]
end
@client = nil
@clientip = nil
@request = nil
end
private
# this is pretty much just a copy of the original method but with more
# feedback
# here's where we have our authorization hooks
def dispatch(methodname, *args)
if defined? @request and @request
unless self.available?(methodname)
raise XMLRPC::FaultException.new(
ERR_UNAUTHORIZED,
"Functionality %s not available" %
methodname.sub(/\..+/, '')
)
end
unless self.authorize(@request, methodname)
raise XMLRPC::FaultException.new(
ERR_UNAUTHORIZED,
"Host %s not authorized to call %s" %
[@request.host, methodname]
)
end
else
raise Puppet::DevError, "Did not get request in dispatch"
end
#Puppet.warning "dispatch on %s called with %s" %
# [methodname, args.inspect]
for name, obj in @handler
if obj.kind_of? Proc
unless methodname == name
#Puppet.debug "obj is proc but %s != %s" %
# [methodname, name]
next
end
else
unless methodname =~ /^#{name}(.+)$/
#Puppet.debug "methodname did not match"
next
end
unless obj.respond_to? $1
#Puppet.debug "methodname does not respond to %s" % $1
next
end
obj = obj.method($1)
end
if check_arity(obj, args.size)
if @service_hook.nil?
return obj.call(*args)
else
return @service_hook.call(obj, *args)
end
else
Puppet.debug "arity is incorrect"
end
end
if @default_handler.nil?
raise XMLRPC::FaultException.new(
ERR_METHOD_MISSING,
"Method #{methodname} missing or wrong number of parameters!"
)
else
@default_handler.call(methodname, *args)
end
end
end
end
# $Id$
|
