/usr/lib/ruby/1.8/drb/acl.rb is in libruby1.8 1.8.7.352-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | # acl-2.0 - simple Access Control List
#
# Copyright (c) 2000,2002,2003 Masatoshi SEKI
#
# acl.rb is copyrighted free software by Masatoshi SEKI.
# You can redistribute it and/or modify it under the same terms as Ruby.
require 'ipaddr'
class ACL
VERSION=["2.0.0"]
class ACLEntry
def initialize(str)
if str == '*' or str == 'all'
@pat = [:all]
elsif str.include?('*')
@pat = [:name, dot_pat(str)]
else
begin
@pat = [:ip, IPAddr.new(str)]
rescue ArgumentError
@pat = [:name, dot_pat(str)]
end
end
end
private
def dot_pat_str(str)
list = str.split('.').collect { |s|
(s == '*') ? '.+' : s
}
list.join("\\.")
end
private
def dot_pat(str)
exp = "^" + dot_pat_str(str) + "$"
Regexp.new(exp)
end
public
def match(addr)
case @pat[0]
when :all
true
when :ip
begin
ipaddr = IPAddr.new(addr[3])
ipaddr = ipaddr.ipv4_mapped if @pat[1].ipv6? && ipaddr.ipv4?
rescue ArgumentError
return false
end
(@pat[1].include?(ipaddr)) ? true : false
when :name
(@pat[1] =~ addr[2]) ? true : false
else
false
end
end
end
class ACLList
def initialize
@list = []
end
public
def match(addr)
@list.each do |e|
return true if e.match(addr)
end
false
end
public
def add(str)
@list.push(ACLEntry.new(str))
end
end
DENY_ALLOW = 0
ALLOW_DENY = 1
def initialize(list=nil, order = DENY_ALLOW)
@order = order
@deny = ACLList.new
@allow = ACLList.new
install_list(list) if list
end
public
def allow_socket?(soc)
allow_addr?(soc.peeraddr)
end
public
def allow_addr?(addr)
case @order
when DENY_ALLOW
return true if @allow.match(addr)
return false if @deny.match(addr)
return true
when ALLOW_DENY
return false if @deny.match(addr)
return true if @allow.match(addr)
return false
else
false
end
end
public
def install_list(list)
i = 0
while i < list.size
permission, domain = list.slice(i,2)
case permission.downcase
when 'allow'
@allow.add(domain)
when 'deny'
@deny.add(domain)
else
raise "Invalid ACL entry #{list.to_s}"
end
i += 2
end
end
end
if __FILE__ == $0
# example
list = %w(deny all
allow 192.168.1.1
allow ::ffff:192.168.1.2
allow 192.168.1.3
)
addr = ["AF_INET", 10, "lc630", "192.168.1.3"]
acl = ACL.new
p acl.allow_addr?(addr)
acl = ACL.new(list, ACL::DENY_ALLOW)
p acl.allow_addr?(addr)
end
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