/usr/lib/opendnssec/kasp_auditor/config.rb is in opendnssec-auditor 1.3.4-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# $Id: config.rb 4181 2010-11-11 15:43:58Z alex $
#
# Copyright (c) 2009 Nominet UK. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
require 'xsd/datatypes'
module KASPAuditor
# Represents KASP configuration file
# Also loads salt in from <zone_config>.xml SignerConfiguration file.
class Config
class ConfigLoadError < Exception
end
attr_reader :err
attr_accessor :changed_config
# Should the PartialAuditor be used instead of the full Auditor?
attr_reader :partial_audit
def initialize(zone_name, kasp_file_loc, policy, config_file_loc, syslog)
return if !zone_name
# @zones = []
# print "Opening config file : #{config_file_loc}\n"
# Read the kasp.xml file
@name = (zone_name.to_s+"").untaint
@err = 0
@partial_audit = false
begin
File.open((kasp_file_loc+"").untaint, 'r') {|file|
doc = REXML::Document.new(file)
# Now find the appropiate policy
found_policy = false
doc.elements.each('KASP/Policy') {|p|
if (p.attributes['name'] == policy)
found_policy = true
# Now load the policy in!
# @TODO@ Check out Zone.SOA - should be able to monitor SOA with that
# # Fill out new zone
@audit_tag_present = false
p.elements.each('Audit') {|a|
# Read the information present in the Audit element, and
# figure out what sort of auditor to use - full or partial
@audit_tag_present = true
a.elements.each('Partial') {|partial|
@partial_audit = true
}
}
begin
@signatures = Signatures.new(p.elements['Signatures'])
@denial = Denial.new(p.elements['Denial'])
@keys = Keys.new(p.elements['Keys'])
@soa = SOA.new(p.elements['Zone/SOA'])
rescue Exception => e
raise ConfigLoadError.new("ERROR - Configuration file #{kasp_file_loc} can't be loaded. Try running ods-kaspcheck to check the configuration.")
end
end
}
if (!found_policy)
raise ConfigLoadError.new("ERROR - Can't find policy #{policy.inspect} in KASP Policy.")
end
}
rescue Exception => e
raise ConfigLoadError.new("ERROR - Can't find KASP file : #{kasp_file_loc.inspect} : #{e}")
end
#
# Read the salt ONLY from the SignerConfiguration
if (@denial.nsec3)
conf_f = (config_file_loc.to_s+"").untaint
begin
File.open(conf_f, 'r') {|file|
doc = REXML::Document.new(file)
e = doc.elements['SignerConfiguration/Zone/Denial/NSEC3/Hash/']
if (e)
@denial.nsec3.hash.salt = e.elements['Salt'].text
decoded_salt = Dnsruby::RR::NSEC3.decode_salt(@denial.nsec3.hash.salt)
if (decoded_salt.length.to_i != @denial.nsec3.hash.salt_length.to_i)
# @TODO@ Only log this if this is a zone of interest!
msg = "ERROR : SALT LENGTH IS #{decoded_salt.length}, but should be #{@denial.nsec3.hash.salt_length}"
print "#{Syslog::LOG_ERR}: #{msg}\n"
begin
syslog.log(Syslog::LOG_ERR, msg)
rescue ArgumentError # Make sure we continue no matter what
end
@err = Syslog::LOG_ERR
end
else
raise ConfigLoadError.new("ERROR - can't read salt from SignerConfiguration file : #{conf_f}")
end
}
rescue Errno::ENOENT
raise ConfigLoadError.new("ERROR - Can't find SignerConfiguration file : #{conf_f}")
end
end
end
# Check the defined hash algorithm against the denial type. If NSEC3 is
# being used, then make sure that the key algorithm is consistent with NSEC3.
# Return true if an inconsistent key algorithm is used with NSEC3.
# Return false otherwise.
def inconsistent_nsec3_algorithm?
if (@denial.nsec3)
@keys.keys.each {|key|
if ((key.algorithm != Dnsruby::Algorithms.DSA_NSEC3_SHA1) &&
(key.algorithm != Dnsruby::Algorithms.RSASHA1_NSEC3_SHA1) &&
(key.algorithm != Dnsruby::Algorithms.RSASHA256) &&
(key.algorithm != Dnsruby::Algorithms.RSASHA512))
return true
end
}
end
return false
end
def self.xsd_duration_to_seconds xsd_duration
# XSDDuration hack
xsd_duration = "P0DT#{$1}" if xsd_duration =~ /^PT(.*)$/
xsd_duration = "-P0DT#{$1}" if xsd_duration =~ /^-PT(.*)$/
a = XSD::XSDDuration.new xsd_duration
from_min = 0 | a.min * 60
from_hour = 0 | a.hour * 60 * 60
from_day = 0 | a.day * 60 * 60 * 24
from_month = 0 | a.month * 60 * 60 * 24 * 31
from_year = 0 | a.year * 60 * 60 * 24 * 365
# XSD::XSDDuration seconds hack.
x = a.sec.to_s.to_i + from_min + from_hour + from_day + from_month + from_year
return x
end
attr_accessor :name, :signatures, :keys, :denial, :soa, :audit_tag_present
class Signatures
attr_accessor :resign, :refresh, :jitter, :inception_offset, :validity
def initialize(e)
resign_text = e.elements['Resign'].text
@resign = Config.xsd_duration_to_seconds(resign_text)
refresh_text = e.elements['Refresh'].text
@refresh = Config.xsd_duration_to_seconds(refresh_text)
jitter_text = e.elements['Jitter'].text
@jitter = Config.xsd_duration_to_seconds(jitter_text)
inception_offset_text = e.elements['InceptionOffset'].text
@inception_offset = Config.xsd_duration_to_seconds(inception_offset_text)
@validity = Validity.new(e.elements['Validity'])
end
class Validity
attr_accessor :default, :denial
def initialize(e)
default_text = e.elements['Default'].text
@default = Config.xsd_duration_to_seconds(default_text)
denial_text = e.elements['Denial'].text
@denial = Config.xsd_duration_to_seconds(denial_text)
end
end
end
class Denial
attr_accessor :nsec, :nsec3
def initialize(e)
if (e.elements['NSEC'])
@nsec = Nsec.new() # e.elements['NSEC'])
else
@nsec3 = Nsec3.new(e.elements['NSEC3'])
end
end
class Nsec
end
class Nsec3
attr_accessor :optout, :hash
def initialize(e)
@optout = false
if (e.elements['OptOut'])
@optout = true
end
@hash = Hash.new(e.elements['Hash'])
end
class Hash
attr_accessor :algorithm, :iterations, :salt, :salt_length
def initialize(e)
@algorithm = e.elements['Algorithm'].text.to_i
@iterations = e.elements['Iterations'].text.to_i
e.elements.each('Salt') {|s|
@salt_length = s.attributes['length']
}
end
end
end
end
class SOA
UNIXTIME = "unixtime"
COUNTER = "counter"
DATECOUNTER = "datecounter"
KEEP = "keep"
attr_accessor :ttl, :minimum, :serial
def initialize(e)
ttl_text = e.elements['TTL'].text
@ttl = Config.xsd_duration_to_seconds(ttl_text)
min_text = e.elements['Minimum'].text
@minimum = Config.xsd_duration_to_seconds(min_text)
@serial = e.elements['Serial'].text
if (!([UNIXTIME, COUNTER, DATECOUNTER, KEEP].include?@serial))
# @TODO@ Log errors encountered in config?
# Leave to policy configuration auditor
print "ERROR : zone serial type incorrect! (#{@serial} found)\n"
end
end
end
class Keys
attr_accessor :ttl, :ksks, :zsks
def keys
return @ksks + @zsks
end
def initialize(e)
ttl_text = e.elements['TTL'].text
@ttl = Config.xsd_duration_to_seconds(ttl_text)
@ksks = []
e.get_elements('KSK').each {|k|
key = AnyKey.new(k)
@ksks.push(key)
}
@zsks = []
e.get_elements('ZSK').each {|k|
key = AnyKey.new(k)
@zsks.push(key)
}
end
class AnyKey
attr_accessor :algorithm, :alg_length, :standby, :lifetime
def initialize(e)
# Algorithm length and value
@algorithm = Dnsruby::Algorithms.new(e.elements['Algorithm'].text.to_i)
begin
@standby = e.elements['Standby'].text.to_i
rescue Exception
@standby = 0
end
lifetime_text = e.elements['Lifetime'].text
@lifetime = Config.xsd_duration_to_seconds(lifetime_text)
if (@lifetime == 0)
@lifetime = 999999999999
end
e.elements.each('Algorithm') {|s|
@alg_length = s.attributes['length'].to_i
}
end
end
end
end
end
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