eslint-plugin-no-credentials/build/calculateEntropy.js

An ESlint plugin checking for any hardcoded credentials

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));

var log2 = function log2(x) {
  return Math.log(x) / Math.log(2);
};

function calculateEntropy(string) {
  var entropy = 0;
  var charset = (0, _toConsumableArray2["default"])(new Set(string.split('')));

  for (var i = 0; i < charset.length; i++) {
    var ratio = (string.split(charset[i]).length - 1) / string.length;

    if (ratio > 0) {
      entropy -= ratio * log2(ratio);
    }
  }

  return entropy;
}

var _default = calculateEntropy;
exports["default"] = _default;