WordPress/wp-admin/js/password-strength-meter.js

function passwordStrength(password1,username,password2){var shortPass=1,badPass=2,goodPass=3,strongPass=4,mismatch=5,symbolSize=0,natLog,score;if((password1!=password2)&&password2.length>0){return mismatch}if(password1.length<4){return shortPass}if(password1.toLowerCase()==username.toLowerCase()){return badPass}if(password1.match(/[0-9]/)){symbolSize+=10}if(password1.match(/[a-z]/)){symbolSize+=26}if(password1.match(/[A-Z]/)){symbolSize+=26}if(password1.match(/[^a-zA-Z0-9]/)){symbolSize+=31}natLog=Math.log(Math.pow(symbolSize,password1.length));score=natLog/Math.LN2;if(score<40){return badPass}if(score<56){return goodPass}return strongPass};