/usr/lib/one/ruby/OpenNebula/Acl.rb is in ruby-opennebula 3.4.1-4.1ubuntu1.
This file is owned by root:root, with mode 0o644.
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# Copyright 2002-2012, OpenNebula Project Leads (OpenNebula.org) #
# #
# 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. #
#--------------------------------------------------------------------------- #
module OpenNebula
# Abstract rules of the type USER RESOURCE RIGHTS
# which are:
# USER -> #<num>
# @<num>
# ALL
# RESOURCE -> + separated list and "/{#,@}<num>|ALL"
# VM,
# HOST
# NET
# IMAGE
# USER
# TEMPLATE
# GROUP
# ACL
# RIGHTS -> + separated list
# USE
# MANAGE
# ADMIN
# CREATE
class Acl < PoolElement
USERS = {
"UID" => 0x100000000,
"GID" => 0x200000000,
"ALL" => 0x400000000
}
RESOURCES =
{
"VM" => 0x1000000000,
"HOST" => 0x2000000000,
"NET" => 0x4000000000,
"IMAGE" => 0x8000000000,
"USER" => 0x10000000000,
"TEMPLATE" => 0x20000000000,
"GROUP" => 0x40000000000,
"DATASTORE" => 0x100000000000,
"CLUSTER" => 0x200000000000
}
RIGHTS =
{
"USE" => 0x1, # Auth. to use an object
"MANAGE" => 0x2, # Auth. to perform management actions
"ADMIN" => 0x4, # Auth. to perform administrative actions
"CREATE" => 0x8 # Auth. to create an object
}
# Constructor
#
# @param xml [String] must be an xml built with {#build_xml}
# @param client [Client] represents an XML-RPC connection
def initialize(xml, client)
super(xml,client)
end
# Creates an empty XML representation. It contains the id, if it is
# specified.
#
# @param pe_id [Integer] rule ID
# @param client [Client] represents an XML-RPC connection
#
# @return [String] an empty XML representation
def self.build_xml(pe_id=nil)
if pe_id
acl_xml = "<ACL><ID>#{pe_id}</ID></ACL>"
else
acl_xml = "<ACL></ACL>"
end
XMLElement.build_xml(acl_xml,'ACL')
end
# Creates a new ACL rule.
#
# @param user [String]
# A string containing a hex number, e.g. 0x100000001
# @param resource [String]
# A string containing a hex number, e.g. 0x2100000001
# @param rights [String]
# A string containing a hex number, e.g. 0x10
#
# @return [nil, OpenNebula::Error] nil in case of success, Error
# otherwise
def allocate(user, resource, rights)
return super( AclPool::ACL_POOL_METHODS[:addrule],
user,
resource,
rights )
end
# Deletes the Acl rule
#
# @return [nil, OpenNebula::Error] nil in case of success, Error
# otherwise
def delete()
super(AclPool::ACL_POOL_METHODS[:delrule])
end
# Does nothing, individual ACL rules info can't be retrieved from
# OpenNebula
#
# @return [nil] nil
def info()
return nil
end
# Parses a rule string, e.g. "#5 HOST+VM/@12 INFO+CREATE+DELETE"
#
# @param rule_str [String] an ACL rule in string format
#
# @return [Array] an Array containing 3 strings (hex 64b numbers),
# or OpenNebula::Error objects
def self.parse_rule(rule_str)
ret = Array.new
rule_str = rule_str.split(" ")
if rule_str.length != 3
return OpenNebula::Error.new(
"String needs three components: User, Resource, Rights")
end
ret << parse_users(rule_str[0])
ret << parse_resources(rule_str[1])
ret << parse_rights(rule_str[2])
errors=ret.map do |arg|
if OpenNebula.is_error?(arg)
arg.message
else
nil
end
end
errors.compact!
if errors.length>0
return OpenNebula::Error.new(errors.join(', '))
end
return ret
end
private
# Converts a string in the form [#<id>, @<id>, *] to a hex. number
#
# @param users [String] Users component string
#
# @return [String] A string containing a hex number
def self.parse_users(users)
begin
return calculate_ids(users).to_i.to_s(16)
rescue Exception => e
return OpenNebula::Error.new(e.message)
end
end
# Converts a resources string to a hex. number
#
# @param resources [String] Resources component string
#
# @return [String] A string containing a hex number
def self.parse_resources(resources)
begin
ret = 0
resources = resources.split("/")
if resources.size != 2
raise "Resource '#{resources}' malformed"
end
resources[0].split("+").each{ |resource|
if !RESOURCES[resource.upcase]
raise "Resource '#{resource}' does not exist"
end
ret += RESOURCES[resource.upcase]
}
ret += calculate_ids(resources[1])
return ret.to_i.to_s(16)
rescue Exception => e
return OpenNebula::Error.new(e.message)
end
end
# Converts a rights string to a hex. number
#
# @param rights [String] Rights component string
#
# @return [String] A string containing a hex number
def self.parse_rights(rights)
begin
ret = 0
rights = rights.split("+")
rights.each{ |right|
raise "Right '#{right}' does not exist" if !RIGHTS[right.upcase]
ret += RIGHTS[right.upcase]
}
return ret.to_i.to_s(16)
rescue Exception => e
return OpenNebula::Error.new(e.message)
end
end
# Calculates the numeric value for a String containing an individual
# (#<id>), group (@<id>) or all (*) ID component
#
# @param id_str [String] Rule Id string
#
# @return [Integer] the numeric value for the given id_str
def self.calculate_ids(id_str)
raise "ID string '#{id_str}' malformed" if
!id_str.match(/^([\#@]\d+|\*)$/)
value = 0
case id_str[0..0]
when "#"
value = USERS["UID"]
users_value = id_str[1..-1].to_i + value
when "@"
value = USERS["GID"]
users_value = id_str[1..-1].to_i + value
when "*"
users_value = USERS["ALL"]
end
return users_value
end
end
end
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