raise error if k > n

[secretsharing.git] / lib / secretsharing / shamir.rb

module SecretSharing
        class Shamir
                attr_reader :n, :k, :secret

                def initialize(n, k=n)
                        if k > n then
                                raise ArgumentError, 'k must be smaller or equal than n'
                        end     
                        @n = n
                        @k = k
                        @secret = nil
                        @shares = []
                end

                def secret_set?
                        ! @secret.nil?
                end
        end
end