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# coding: ASCII-8BIT
class ASN1Kit::Integer < ASN1Kit::Type
asn1_tag :IMPLICIT, :UNIVERSAL, 2
asn1_alias "INTEGER"
NAMED_NUMBERS = {}
NAMED_NUMBERS_INVERTED = {}
class << self
def [](*named_numbers)
return self if named_numbers.empty?
ret = Class.new(self)
hash = named_numbers.to_h
hash_inverted = hash.invert
raise "duplicate name(s) in named number list" if named_numbers.size != hash.size
raise "duplicate value(s) in named number list" if hash.size != hash_inverted.size
ret.const_set(:NAMED_NUMBERS, hash)
ret.const_set(:NAMED_NUMBERS_INVERTED, hash.invert)
ret
end
def named_number(name)
self::NAMED_NUMBERS[name]
end
def named_numbers
self::NAMED_NUMBERS.keys
end
private def inspect_inner
return nil if self::NAMED_NUMBERS.empty?
nns = self::NAMED_NUMBERS.map { |name, value| "#{name}(#{value})" }.join(", ")
"{ #{nns} }"
end
end
attr_reader :value
def initialize(value)
case value
when Integer
@value = value
when String
@value = self.class::NAMED_NUMBERS[value] or
raise ArgumentError, "invalid name %p" % value
else
raise TypeError, "invalid value: %p (expected an Integer or a NamedValue label)" % value
end
end
def name
self.class::NAMED_NUMBERS_INVERTED[@value]
end
def to_der
v = @value
if v >= 0
dig = v.digits(256)
dig << 0x00 if dig[-1] >= 0x80
s = dig.pack("C*").reverse
else
v = ~v
dig = v.digits(256)
dig << 0x00 if dig[-1] >= 0x80
s = dig.map!(&:~).pack("C*").reverse
end
der_header(s.bytesize) << s
end
def ==(other)
other.class <= ASN1Kit::Integer && value == other.value
end
def cast_to(type)
return type.new(@value) if type <= ASN1Kit::Integer
super
end
private def inspect_inner
if n = name
"#{@value}(#{n})"
else
"#{@value}"
end
end
end
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