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module OpenTox
require "rexml/document"
#Module for policy-processing
# @see also http://www.opentox.org/dev/apis/api-1.2/AA for opentox API specs
# Class Policies corresponds to <policies> container of an xml-policy-fle
class Policies
attr_accessor :name, :policies
def initialize()
@policies = {}
end
#create new policy instance with name
# @param [String]name of the policy
def new_policy(name)
@policies[name] = Policy.new(name)
end
#drop a specific policy in a policies instance
# @param [String]name of the policy
# @return [Boolean]
def drop_policy(name)
return true if @policies.delete(name)
end
#drop all policies in a policies instance
def drop_policies
@policies.each do |name, policy|
drop_policy(name)
end
return true
end
#loads a default policy template in policies instance
def load_default_policy(user, uri, group="member")
template = case user
when "guest", "anonymous" then "default_guest_policy"
else "default_policy"
end
xml = File.read(File.join(File.dirname(__FILE__), "templates/#{template}.xml"))
self.load_xml(xml)
datestring = Time.now.strftime("%Y-%m-%d-%H-%M-%S-x") + rand(1000).to_s
@policies["policy_user"].name = "policy_user_#{user}_#{datestring}"
@policies["policy_user"].rules["rule_user"].uri = uri
@policies["policy_user"].rules["rule_user"].name = "rule_user_#{user}_#{datestring}"
@policies["policy_user"].subjects["subject_user"].name = "subject_user_#{user}_#{datestring}"
@policies["policy_user"].subjects["subject_user"].value = "uid=#{user},ou=people,dc=opentox,dc=org"
@policies["policy_user"].subject_group = "subjects_user_#{user}_#{datestring}"
@policies["policy_group"].name = "policy_group_#{group}_#{datestring}"
@policies["policy_group"].rules["rule_group"].uri = uri
@policies["policy_group"].rules["rule_group"].name = "rule_group_#{group}_#{datestring}"
@policies["policy_group"].subjects["subject_group"].name = "subject_group_#{group}_#{datestring}"
@policies["policy_group"].subjects["subject_group"].value = "cn=#{group},ou=groups,dc=opentox,dc=org"
@policies["policy_group"].subject_group = "subjects_#{group}_#{datestring}"
return true
end
#loads a xml template
def load_xml(xml)
rexml = REXML::Document.new(xml)
rexml.elements.each("Policies/Policy") do |pol| #Policies
policy_name = pol.attributes["name"]
new_policy(policy_name)
#@policies[policy_name] = Policy.new(policy_name)
rexml.elements.each("Policies/Policy[@name='#{policy_name}']/Rule") do |r| #Rules
rule_name = r.attributes["name"]
uri = rexml.elements["Policies/Policy[@name='#{policy_name}']/Rule[@name='#{rule_name}']/ResourceName"].attributes["name"]
@policies[policy_name].rules[rule_name] = @policies[policy_name].new_rule(rule_name, uri)
rexml.elements.each("Policies/Policy[@name='#{policy_name}']/Rule[@name='#{rule_name}']/AttributeValuePair") do |attribute_pairs|
action=nil; value=nil;
attribute_pairs.each_element do |elem|
action = elem.attributes["name"] if elem.attributes["name"]
value = elem.text if elem.text
end
if action and value
case action
when "GET"
@policies[policy_name].rules[rule_name].get = value
when "POST"
@policies[policy_name].rules[rule_name].post = value
when "PUT"
@policies[policy_name].rules[rule_name].put = value
when "DELETE"
@policies[policy_name].rules[rule_name].delete = value
end
end
end
end
rexml.elements.each("Policies/Policy[@name='#{policy_name}']/Subjects") do |subjects| #Subjects
@policies[policy_name].subject_group = subjects.attributes["name"]
rexml.elements.each("Policies/Policy[@name='#{policy_name}']/Subjects[@name='#{@policies[policy_name].subject_group}']/Subject") do |s| #Subject
subject_name = s.attributes["name"]
subject_type = s.attributes["type"]
subject_value = rexml.elements["Policies/Policy[@name='#{policy_name}']/Subjects[@name='#{@policies[policy_name].subject_group}']/Subject[@name='#{subject_name}']/AttributeValuePair/Value"].text
@policies[policy_name].new_subject(subject_name, subject_type, subject_value) if subject_name and subject_type and subject_value
end
end
end
end
#generates xml from policies instance
def to_xml
doc = REXML::Document.new()
doc << REXML::DocType.new("Policies", "PUBLIC \"-//Sun Java System Access Manager7.1 2006Q3\n Admin CLI DTD//EN\" \"jar://com/sun/identity/policy/policyAdmin.dtd\"")
doc.add_element(REXML::Element.new("Policies"))
@policies.each do |name, pol|
policy = REXML::Element.new("Policy")
policy.attributes["name"] = pol.name
policy.attributes["referralPolicy"] = false
policy.attributes["active"] = true
@policies[name].rules.each do |r,rl|
rule = @policies[name].rules[r]
out_rule = REXML::Element.new("Rule")
out_rule.attributes["name"] = rule.name
servicename = REXML::Element.new("ServiceName")
servicename.attributes["name"]="iPlanetAMWebAgentService"
out_rule.add_element(servicename)
rescourcename = REXML::Element.new("ResourceName")
rescourcename.attributes["name"] = rule.uri
out_rule.add_element(rescourcename)
["get","post","delete","put"].each do |act|
if rule.method(act).call
attribute = REXML::Element.new("Attribute")
attribute.attributes["name"] = act.upcase
attributevaluepair = REXML::Element.new("AttributeValuePair")
attributevaluepair.add_element(attribute)
attributevalue = REXML::Element.new("Value")
attributevaluepair.add_element(attributevalue)
attributevalue.add_text REXML::Text.new(rule.method(act).call)
out_rule.add_element(attributevaluepair)
end
end
policy.add_element(out_rule)
end
subjects = REXML::Element.new("Subjects")
subjects.attributes["name"] = pol.subject_group
subjects.attributes["description"] = ""
@policies[name].subjects.each do |subj, subjs|
subject = REXML::Element.new("Subject")
subject.attributes["name"] = pol.subjects[subj].name
subject.attributes["type"] = pol.subjects[subj].type
subject.attributes["includeType"] = "inclusive"
attributevaluepair = REXML::Element.new("AttributeValuePair")
attribute = REXML::Element.new("Attribute")
attribute.attributes["name"] = "Values"
attributevaluepair.add_element(attribute)
attributevalue = REXML::Element.new("Value")
attributevalue.add_text REXML::Text.new(pol.subjects[subj].value)
attributevaluepair.add_element(attributevalue)
subject.add_element(attributevaluepair)
subjects.add_element(subject)
end
policy.add_element(subjects)
doc.root.add_element(policy)
end
out = ""
doc.write(out, 2)
return out
end
end
#single policy in a policies instance
class Policy
attr_accessor :name, :rules, :subject_group, :subjects
def initialize(name)
@name = name
@rules = {}
@subject_group = ""
@subjects = {}
end
#create a new rule instance for the policy
def new_rule(name, uri)
@rules[name] = Rule.new(name, uri)
end
#create a new subject instance for the policy
def new_subject(name, type, value)
@subjects[name] = Subject.new(name, type, value)
end
#rule inside a policy
class Rule
attr_accessor :name, :uri, :get, :post, :put, :delete
def initialize(name, uri)
@name = name
@uri = uri
end
def rename(new, old)
self[new] = self.delete(old)
self[new].name = new
end
def get=(value)
@get = check_value(value, @get)
end
def post=(value)
@post = check_value(value, @post)
end
def delete=(value)
@delete = check_value(value, @delete)
end
def put=(value)
@put = check_value(value, @put)
end
private
#checks if value is allow or deny. returns old value if not valid.
def check_value(new_value, old_value)
return (new_value=="allow" || new_value=="deny" || new_value==nil) ? new_value : old_value
end
end
class Subject
attr_accessor :name, :type, :value
def initialize(name, type, value)
@name = name
@type = type
@value = value
end
end
end
end
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