another test, Node.js

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String.prototype.pad = function( length ,padding ) {

var padding = typeof padding === 'string' && padding.length > 0 ? padding[0] : '\x00'
        ,length = isNaN( length ) ? 0 : ~~length;

return this.length < length ? this + Array( length - this.length + 1 ).join( padding ) : this;

}

String.prototype.packHex = function() {

var source = this.length % 2 ? this + '0' : this
        ,result = '';

for( var i = 0; i < source.length; i = i + 2 ) {
        result += String.fromCharCode( parseInt( source.substr( i , 2 ) ,16 ) );
    }

return result;

}

var crypto = require('crypto');

var keyString = 'asfl;sdkg;dlk;43t3k4ntj3n4tk34tb3jht3jktb3hj4bt34khgkj34;g34gkjd';
var hmacKey = '346456455675674674674683451324124124324';

var h = crypto.createHmac('sha256', hmacKey.packHex()).update(keyString).digest('base64');

console.log("nodejs with packing");
console.log(h);
console.log("==========");

var v = crypto.createHmac('sha256', hmacKey).update(keyString).digest('base64');
console.log("nodejs without packing");
console.log(v);

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