�PNG  IHDR��;���IDATx��ܻn�0���K�� �)(�pA��� ���7�LeG{�� �§㻢|��ذaÆ 6lذaÆ 6lذaÆ 6lom��$^�y���ذag�5bÆ 6lذaÆ 6lذa{���� 6lذaÆ �`����}H�Fkm�,�m����Ӫ���ô�ô!� �x�|'ܢ˟;�E:���9�&ᶒ�}�{�v]�n&�6� �h��_��t�ڠ͵-ҫ���Z;��Z$�.�P���k�ž)�!��o���>}l�eQfJ�T��u і���چ��\��X=8��Rن4`Vw�l�>����n�G�^��i�s��"ms�$�u��i��?w�bs[m�6�K4���O���.�4��%����/����b�C%��t ��M�ז� �-l�G6�mrz2���s�%�9��s@���-�k�9�=���)������k�B5����\��+͂�Zsٲ ��Rn��~G���R���C����� �wIcI��n7jJ���hۛNCS|���j0��8y�iHKֶۛ�k�Ɉ+;Sz������L/��F�*\��Ԕ�#"5��m�2��[S��������=�g��n�a�P�e�ғ�L�� lذaÆ 6l�^k��̱aÆ 6lذaÆ 6lذa;���� �_��ذaÆ 6lذaÆ 6lذaÆ ���R���IEND�B` /** * Module dependencies. */ var crypto = require('crypto'); /** * Sign the given `val` with `secret`. * * @param {String} val * @param {String} secret * @return {String} * @api private */ exports.sign = function(val, secret){ if ('string' != typeof val) throw new TypeError("Cookie value must be provided as a string."); if ('string' != typeof secret) throw new TypeError("Secret string must be provided."); return val + '.' + crypto .createHmac('sha256', secret) .update(val) .digest('base64') .replace(/\=+$/, ''); }; /** * Unsign and decode the given `val` with `secret`, * returning `false` if the signature is invalid. * * @param {String} val * @param {String} secret * @return {String|Boolean} * @api private */ exports.unsign = function(val, secret){ if ('string' != typeof val) throw new TypeError("Signed cookie string must be provided."); if ('string' != typeof secret) throw new TypeError("Secret string must be provided."); var str = val.slice(0, val.lastIndexOf('.')) , mac = exports.sign(str, secret); return sha1(mac) == sha1(val) ? str : false; }; /** * Private */ function sha1(str){ return crypto.createHash('sha1').update(str).digest('hex'); }