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

   1 // Password strength meter
   2 function passwordStrength(password1, username, password2) {
   3         var shortPass = 1, badPass = 2, goodPass = 3, strongPass = 4, mismatch = 5, symbolSize = 0, natLog, score;
   4
   5         // password 1 != password 2
   6         if ( (password1 != password2) && password2.length > 0)
   7                 return mismatch
   8
   9         //password < 4
  10         if ( password1.length < 4 )
  11                 return shortPass
  12
  13         //password1 == username
  14         if ( password1.toLowerCase() == username.toLowerCase() )
  15                 return badPass;
  16
  17         if ( password1.match(/[0-9]/) )
  18                 symbolSize +=10;
  19         if ( password1.match(/[a-z]/) )
  20                 symbolSize +=26;
  21         if ( password1.match(/[A-Z]/) )
  22                 symbolSize +=26;
  23         if ( password1.match(/[^a-zA-Z0-9]/) )
  24                 symbolSize +=31;
  25
  26         natLog = Math.log( Math.pow(symbolSize, password1.length) );
  27         score = natLog / Math.LN2;
  28
  29         if (score < 40 )
  30                 return badPass
  31
  32         if (score < 56 )
  33                 return goodPass
  34
  35     return strongPass;
  36 }