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Variable names changed from underscore to CamelCase. Eslint rules updated. #64

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n1474335 2017-01-31 18:24:56 +00:00
parent f8193797fa
commit e3c977934b
66 changed files with 3176 additions and 3172 deletions
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50
src/js/operations/Entropy.js
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@ -18,14 +18,14 @@ var Entropy = {
/**
* Entropy operation.
*
* @param {byte_array} input
* @param {byteArray} input
* @param {Object[]} args
* @returns {html}
*/
run_entropy: function(input, args) {
var chunk_size = args[0],
runEntropy: function(input, args) {
var chunkSize = args[0],
output = "",
entropy = Entropy._calc_entropy(input);
entropy = Entropy._calcEntropy(input);
output += "Shannon entropy: " + entropy + "\n" +
"<br><canvas id='chart-area'></canvas><br>\n" +
@ -35,14 +35,14 @@ var Entropy = {
"The following results show the entropy of chunks of the input data. Chunks with particularly high entropy could suggest encrypted or compressed sections.\n\n" +
"<br><script>\
var canvas = document.getElementById('chart-area'),\
parent_rect = canvas.parentNode.getBoundingClientRect(),\
parentRect = canvas.parentNode.getBoundingClientRect(),\
entropy = " + entropy + ",\
height = parent_rect.height * 0.25;\
height = parentRect.height * 0.25;\
\
canvas.width = parent_rect.width * 0.95;\
canvas.width = parentRect.width * 0.95;\
canvas.height = height > 150 ? 150 : height;\
\
CanvasComponents.draw_scale_bar(canvas, entropy, 8, [\
CanvasComponents.drawScaleBar(canvas, entropy, 8, [\
{\
label: 'English text',\
min: 3.5,\
@ -55,11 +55,11 @@ var Entropy = {
]);\
</script>";
var chunk_entropy = 0;
if (chunk_size !== 0) {
for (var i = 0; i < input.length; i += chunk_size) {
chunk_entropy = Entropy._calc_entropy(input.slice(i, i+chunk_size));
output += "Bytes " + i + " to " + (i+chunk_size) + ": " + chunk_entropy + "\n";
var chunkEntropy = 0;
if (chunkSize !== 0) {
for (var i = 0; i < input.length; i += chunkSize) {
chunkEntropy = Entropy._calcEntropy(input.slice(i, i+chunkSize));
output += "Bytes " + i + " to " + (i+chunkSize) + ": " + chunkEntropy + "\n";
}
} else {
output += "Chunk size cannot be 0.";
@ -78,17 +78,17 @@ var Entropy = {
/**
* Frequency distribution operation.
*
* @param {byte_array} input
* @param {byteArray} input
* @param {Object[]} args
* @returns {html}
*/
run_freq_distrib: function (input, args) {
runFreqDistrib: function (input, args) {
if (!input.length) return "No data";
var distrib = new Array(256),
percentages = new Array(256),
len = input.length,
show_zeroes = args[0];
showZeroes = args[0];
// Initialise distrib to 0
for (var i = 0; i < 256; i++) {
@ -115,19 +115,19 @@ var Entropy = {
"\n\nByte Percentage\n" +
"<script>\
var canvas = document.getElementById('chart-area'),\
parent_rect = canvas.parentNode.getBoundingClientRect(),\
parentRect = canvas.parentNode.getBoundingClientRect(),\
scores = " + JSON.stringify(percentages) + ";\
\
canvas.width = parent_rect.width * 0.95;\
canvas.height = parent_rect.height * 0.9;\
canvas.width = parentRect.width * 0.95;\
canvas.height = parentRect.height * 0.9;\
\
CanvasComponents.draw_bar_chart(canvas, scores, 'Byte', 'Frequency %', 16, 6);\
CanvasComponents.drawBarChart(canvas, scores, 'Byte', 'Frequency %', 16, 6);\
</script>";
for (i = 0; i < 256; i++) {
if (distrib[i] || show_zeroes) {
if (distrib[i] || showZeroes) {
output += " " + Utils.hex(i, 2) + " (" +
Utils.pad_right(percentages[i].toFixed(2).replace(".00", "") + "%)", 8) +
Utils.padRight(percentages[i].toFixed(2).replace(".00", "") + "%)", 8) +
Array(Math.ceil(percentages[i])+1).join("|") + "\n";
}
}
@ -140,13 +140,13 @@ var Entropy = {
* Calculates the Shannon entropy for a given chunk of data.
*
* @private
* @param {byte_array} data
* @param {byteArray} data
* @returns {number}
*/
_calc_entropy: function(data) {
_calcEntropy: function(data) {
var prob = [],
uniques = data.unique(),
str = Utils.byte_array_to_chars(data);
str = Utils.byteArrayToChars(data);
for (var i = 0; i < uniques.length; i++) {
prob.push(str.count(Utils.chr(uniques[i])) / data.length);