ectomobile/app/models/reading.rb

# frozen_string_literal: true

class Reading < ApplicationRecord
  belongs_to :raspberry
  has_many :sensors

  # @param :public_key [SSHData::PublicKey]
  def verify(public_key)
    public_key == ssh_signature.public_key && ssh_signature.verify(raw_transaction)
  rescue SSHData::Error
    false
  end

  private

  def ssh_signature
    @ssh_signature ||= SSHData::Signature.parse_pem <<~PEM
      -----BEGIN SSH SIGNATURE-----
      #{signature}
      -----END SSH SIGNATURE-----
    PEM
  end
end