Module: MoneyTree::OpenSSLExtensions

Defined in:
lib/openssl_extensions.rb

Class Method Summary collapse

Class Method Details

.add(point_0, point_1) ⇒ Object 



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# File 'lib/openssl_extensions.rb', line 7

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

.validate_points(*points) ⇒ Object 



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# File 'lib/openssl_extensions.rb', line 22

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