Contents

# encoding: ascii-8bit

require 'openssl'

module MoneyTree
  module OpenSSLExtensions
    def self.add(point_0, point_1)
      validate_points(point_0, point_1)

      group = OpenSSL::PKey::EC::Group.new('secp256k1')
      
      point_0_hex = point_0.to_bn.to_s(16)
      point_0_pt = OpenSSL::PKey::EC::Point.new(group, OpenSSL::BN.new(point_0_hex, 16))
      point_1_hex = point_1.to_bn.to_s(16)
      point_1_pt = OpenSSL::PKey::EC::Point.new(group, OpenSSL::BN.new(point_1_hex, 16))

      sum_point = point_0_pt.add(point_1_pt)

      sum_point.to_bn.to_s(16)
    end

    def self.validate_points(*points)
      points.each do |point|
        if !point.is_a?(OpenSSL::PKey::EC::Point)
          raise ArgumentError, "point must be an OpenSSL::PKey::EC::Point object" 
        elsif point.infinity?
          raise ArgumentError, "point must not be infinity" 
        end
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
money-tree-openssl-1.1	lib/openssl_extensions.rb