code: function rsaVerify (input, algorithm, publicSecret, signature) {
    try {
      // verify with rsa_public_key.pem
      const verify = crypto.createVerify(algorithm).update(input).verify(
        publicSecret,
        base64URLUnescape(signature),
        'base64'
      )
      if (!verify) {
        errorMap['006'].message = 'Unvalid public secret for rsa verify, signature verification failed'
        errorMap['006'].error = new Error(errorMap['006'].message)
      }
      return verify
    } catch (e) {
      errorMap['006'].message = 'Exception error in rsa verify, signature verification failed'
      errorMap['006'].error = e
      return false
    }
  }
docs: rsa verify signature
  @param  {String} input            rsa verify input
  @param  {String} algorithm        rsa verify algorithm
  @param  {String} publicSecret     rsa verify secret
  @param  {String} signature        rsa verify signature
  @return {Object}                  rsa verify result