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@@ -20,4 +20,100 @@ function insert_warning_window(element, content) {
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$.fn.hasAttr = function(name) {
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return this.attr(name) !== undefined;
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-};
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+};
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+
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+// Public: Constructor
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+function RandomPassword() {
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+ this.chrLower="abcdefghjkmnpqrst";
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+ this.chrUpper="ABCDEFGHJKMNPQRST";
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+ this.chrNumbers="23456789";
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+ this.chrSymbols="!#%&?+*_.,:;";
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+
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+ this.maxLength=255;
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+ this.minLength=8;
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+}
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+
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+/*
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+ Public: Create password
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+
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+ length (optional): Password length. If value is not within minLength/maxLength (defined in constructor), length will be adjusted automatically.
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+
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+ characters (optional): The characters the password will be composed of. Must contain at least one of the following:
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+ this.chrLower
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+ this.chrUpper
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+ this.chrNumbers
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+ this.chrSymbols
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+ Use + to combine. You can add your own sets of characters. If not at least one of the constructor defined sets of characters is found, default set of characters will be used.
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+*/
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+RandomPassword.prototype.create = function(length, characters) {
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+ var _length=this.adjustLengthWithinLimits(length);
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+ var _characters=this.secureCharacterCombination(characters);
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+
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+ return this.shufflePassword(this.assemblePassword(_characters, _length));
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+};
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+
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+// Private: Adjusts password length to be within limits.
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+RandomPassword.prototype.adjustLengthWithinLimits = function(length) {
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+ if(!length || length<this.minLength)
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+ return this.minLength;
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+ else if(length>this.maxLength)
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+ return this.maxLength;
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+ else
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+ return length;
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+};
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+
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+// Private: Make sure characters password is build of contains meaningful set of characters.
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+RandomPassword.prototype.secureCharacterCombination = function(characters) {
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+ var defaultCharacters=this.chrLower+this.chrUpper+this.chrNumbers;
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+
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+ if(!characters || this.trim(characters)=="")
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+ return defaultCharacters;
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+ else if(!this.containsAtLeast(characters, [this.chrLower, this.chrUpper, this.chrNumbers, this.chrSymbols]))
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+ return defaultCharacters;
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+ else
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+ return characters;
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+
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+};
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+
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+// Private: Assemble password using a string of characters the password will consist of.
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+RandomPassword.prototype.assemblePassword = function(characters, length) {
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+ var randMax=this.chrNumbers.length;
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+ var randMin=randMax-4;
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+ var index=this.random(0, characters.length-1);
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+ var password="";
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+
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+ for(var i=0; i<length; i++) {
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+ var jump=this.random(randMin, randMax);
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+ index=((index+jump)>(characters.length-1)?this.random(0, characters.length-1):index+jump);
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+ password+=characters[index];
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+ }
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+
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+ return password;
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+};
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+
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+// Private: Shuffle password.
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+RandomPassword.prototype.shufflePassword = function(password) {
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+ return password.split('').sort(function(){return 0.5-Math.random()}).join('');
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+};
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+
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+// Private: Checks if string contains at least one string in an array
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+RandomPassword.prototype.containsAtLeast = function(string, strings) {
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+ for(var i=0; i<strings.length; i++) {
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+ if(string.indexOf(strings[i])!=-1)
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+ return true;
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+ }
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+ return false;
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+};
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+
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+// Private: Returns a random number between min and max.
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+RandomPassword.prototype.random = function(min, max) {
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+ return Math.floor((Math.random() * max) + min);
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+};
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+
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+// Private: Trims a string (required for compatibility with IE9 or older)
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+RandomPassword.prototype.trim = function(s) {
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+ if(typeof String.prototype.trim !== 'function')
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+ return s.replace(/^\s+|\s+$/g, '');
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+ else
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+ return s.trim();
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+};
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James Iter