96 lines
2.9 KiB
Ruby
96 lines
2.9 KiB
Ruby
# NET::BER
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# Mixes ASN.1/BER convenience methods into several standard classes.
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# Also provides BER parsing functionality.
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#
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#----------------------------------------------------------------------------
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#
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# Copyright (C) 2006 by Francis Cianfrocca. All Rights Reserved.
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#
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# Gmail: garbagecat10
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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#---------------------------------------------------------------------------
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module Net
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module BER
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VERSION = '0.1.0'
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#--
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# This condenses our nicely self-documenting ASN hashes down
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# to an array for fast lookups.
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# Scoped to be called as a module method, but not intended for
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# user code to call.
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#
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def self.compile_syntax(syn)
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out = [nil] * 256
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syn.each do |tclass, tclasses|
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tagclass = {:universal=>0, :application=>64, :context_specific=>128, :private=>192} [tclass]
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tclasses.each do |codingtype,codings|
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encoding = {:primitive=>0, :constructed=>32} [codingtype]
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codings.each {|tag, objtype| out[tagclass + encoding + tag] = objtype }
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end
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end
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out
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end
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def to_ber
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# Provisional implementation.
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# We ASSUME that our incoming value is an array, and we
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# use the Array#to_ber_oid method defined below.
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# We probably should obsolete that method, actually, in
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# and move the code here.
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# WE ARE NOT CURRENTLY ENCODING THE BER-IDENTIFIER.
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# This implementation currently hardcodes 6, the universal OID tag.
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ary = @value.dup
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first = ary.shift
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raise Net::BER::BerError.new(" invalid OID" ) unless [0,1,2].include?(first)
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first = first * 40 + ary.shift
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ary.unshift first
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oid = ary.pack("w*")
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[6, oid.length].pack("CC") + oid
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end
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end
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end
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module Net
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module BER
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class BerError < StandardError; end
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class BerIdentifiedString < String
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attr_accessor :ber_identifier
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def initialize args
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super args
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end
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end
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class BerIdentifiedArray < Array
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attr_accessor :ber_identifier
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def initialize(*args)
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super
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end
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end
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class BerIdentifiedNull
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attr_accessor :ber_identifier
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def to_ber
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"\005\000"
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end
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end
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end
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end
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require 'net/ber/ber_parser'
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