Encrypt and decrypt data

sign_token.rb

require 'json/jwt'
require 'jwt'

module SignToken
  extend self

  def encrypt_data(payload)
    rsa_private = OpenSSL::PKey::RSA.generate 2048
    rsa_public = rsa_private.public_key
    token = JWT.encode payload, rsa_private, 'RS256'
    return {
            public_key: rsa_public.to_s,
            signed_token: token
          }
  end

  def decrypt_data(token, rsa_public)
    begin
      public_key = OpenSSL::PKey::RSA.new(rsa_public)
      JWT.decode token, public_key, true, { :algorithm => 'RS256' }
      return true
    rescue Exception => e
      return e.message
    end
  end

end