code: function (message, signature) {
        var md = forge.md.sha1.create();
        md.update(message, 'utf8');
        try {
          return this._cert.publicKey.verify(md.digest().bytes(), forge.util.decode64(signature));
        } catch (e) {
          return false;
        }
      }
docs: Verify a signature (RSA-SHA1) for the message
  @param {String} message The message signed
  @param {String} signature The signature of the message in Base64 format
  @returns {Boolean} True is the signature is successful verified