user.html has entrpy color-coding, thanks Niphlod

2012-09-21 08:57:11 -05:00
parent 3c8c25d680
commit fd9b100423
2 changed files with 89 additions and 2 deletions
@@ -1 +1 @@
-Version 2.0.9 (2012-09-21 08:29:10) stable
+Version 2.0.9 (2012-09-21 08:57:04) stable
@@ -14,6 +14,93 @@ pass
 }}
 </div>
 <script language="javascript"><!--
-      jQuery("#web2py_user_form input:visible:enabled:first").focus();
+jQuery("#web2py_user_form input:visible:enabled:first").focus();
+
+
+function calc_entropy(mystring) {
+    /*" calculate a simple entropy for a given string "*/
+    var lowerset = 'abcdefghijklmnopqrstuvwxyz';
+    var upperset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+    var numberset = '0123456789';
+    var sym1set = '!@#$%^&*()';
+    var sym2set = '~`-_=+[]{}\\|;:\'",.<>?/';
+    var otherset = '0123456789abcdefghijklmnopqrstuvwxyz' /*anything else*/
+    var alphabet = 0;
+    var other = {};
+    var seen = {};
+    var lastset = null;
+    var mystringlist = mystring.split('');
+    for (var i=0;i<mystringlist.length;i++) {
+        var c = mystringlist[i];
+        //console.log('we are at char', c);
+        /* classify this character*/
+        var inset = otherset;
+        while (1) {
+            /*lowerset*/
+            if (lowerset.indexOf(c) != -1) {
+                inset = lowerset;
+                break
+            };
+            /*upperset*/
+            if (upperset.indexOf(c) != -1) {
+                inset = upperset;
+                break
+            };
+            /*numberset*/
+            if (numberset.indexOf(c) != -1) {
+                inset = numberset;
+                break
+            };
+            /*sym1set*/
+            if (sym1set.indexOf(c) != -1) {
+                inset = sym1set;
+                break
+            };
+            /*sym2set*/
+            if (sym2set.indexOf(c) != -1) {
+                inset = sym2set;
+                break
+            } else {break};
+        }
+        //console.log('inset detected as', inset, seen);
+        /*calculate effect of character on alphabet size*/
+        if (!(inset in seen)) {
+            //console.log('credit for a new character set');
+            seen[inset] = 1;
+            alphabet += inset.length; /*credit for a new character set*/
+        }
+        else if (!(c in other)) {
+            //console.log('credit for unique characters');
+            alphabet += 1;
+            other[c] = 1;
+        }
+        if (inset != lastset) {
+            //console.log('credit for set transitions');
+            alphabet += 1;  /*credit for set transitions*/
+            lastset = inset;
+        }
+    }
+    var entropy = mystring.length / 1.0 * Math.log(alphabet) / 0.6931471805599453; /*math.log(2)*/
+    return Math.round(entropy*100)/100
+}
+
+function validate_entropy(myfield, midrange) {
+    var k = 256.0/midrange;
+    var validator = function () {
+            var value = calc_entropy(myfield.val());
+	    var color;
+            if(value<30) {
+                var c = Math.floor(value*k).toString(16);
+                color = '#ff'+((c.length==1)?'0':''+c)+'00';
+            } else {
+                var c = Math.floor(Math.max(0,255-(value-midrange)*k)).toString(16);
+                color = '#'+((c.length==1)?'0':'')+c+'ff00';
+	    }
+	    myfield.css('background-color',color);
+        }
+        myfield.on('keyup', validator);
+        myfield.on('keydown', validator);
+    }
+    validate_entropy(jQuery('#auth_user_password'),50);
      //--></script>