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426 lines
14 KiB
HTML
Executable file
426 lines
14 KiB
HTML
Executable file
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<h1 class="page-title">Source: operations/Hexdump.js</h1>
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<section>
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<article>
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<pre
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class="sunlight-highlight-javascript linenums">/* globals app */
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/**
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* Hexdump operations.
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*
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* @namespace
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*/
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var Hexdump = {
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/**
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* @constant
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* @default
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*/
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WIDTH: 16,
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/**
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* @constant
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* @default
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*/
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UPPER_CASE: false,
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/**
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* @constant
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* @default
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*/
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INCLUDE_FINAL_LENGTH: false,
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/**
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* To Hexdump operation.
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*
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* @param {byte_array} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_to: function(input, args) {
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var length = args[0] || Hexdump.WIDTH;
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var upper_case = args[1];
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var include_final_length = args[2];
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var output = "", padding = 2;
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for (var i = 0; i < input.length; i += length) {
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var buff = input.slice(i, i+length);
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var hexa = "";
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for (var j = 0; j < buff.length; j++) {
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hexa += Utils.hex(buff[j], padding) + " ";
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}
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var line_no = Utils.hex(i, 8);
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if (upper_case) {
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hexa = hexa.toUpperCase();
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line_no = line_no.toUpperCase();
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}
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output += line_no + " " +
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Utils.pad_right(hexa, (length*(padding+1))) +
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" |" + Utils.pad_right(Utils.printable(Utils.byte_array_to_chars(buff)), buff.length) + "|\n";
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if (include_final_length && i+buff.length == input.length) {
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output += Utils.hex(i+buff.length, 8) + "\n";
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}
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}
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return output.slice(0, -1);
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},
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/**
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* From Hexdump operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {byte_array}
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*/
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run_from: function(input, args) {
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var output = [],
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regex = /^\s*(?:[\dA-F]{4,16}:?)?\s*((?:[\dA-F]{2}\s){1,8}(?:\s|[\dA-F]{2}-)(?:[\dA-F]{2}\s){1,8}|(?:[\dA-F]{2}\s|[\dA-F]{4}\s)+)/igm,
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block, line;
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while (!!(block = regex.exec(input))) {
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line = Utils.from_hex(block[1].replace(/-/g, " "));
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for (var i = 0; i < line.length; i++) {
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output.push(line[i]);
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}
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}
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// Is this a CyberChef hexdump or is it from a different tool?
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var width = input.indexOf("\n");
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var w = (width - 13) / 4;
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// w should be the specified width of the hexdump and therefore a round number
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if (Math.floor(w) != w || input.indexOf("\r") != -1 || output.indexOf(13) != -1) {
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app.options.attempt_highlight = false;
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}
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return output;
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},
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/**
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* Highlight to hexdump
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlight_to: function(pos, args) {
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// Calculate overall selection
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var w = args[0] || 16,
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width = 14 + (w*4),
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line = Math.floor(pos[0].start / w),
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offset = pos[0].start % w,
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start = 0,
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end = 0;
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pos[0].start = line*width + 10 + offset*3;
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line = Math.floor(pos[0].end / w);
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offset = pos[0].end % w;
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if (offset === 0) { line--; offset = w; }
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pos[0].end = line*width + 10 + offset*3 - 1;
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// Set up multiple selections for bytes
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var start_line_num = Math.floor(pos[0].start / width);
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var end_line_num = Math.floor(pos[0].end / width);
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if (start_line_num == end_line_num) {
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pos.push(pos[0]);
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} else {
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start = pos[0].start;
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end = (start_line_num+1) * width - w - 5;
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pos.push({ start: start, end: end });
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while (end < pos[0].end) {
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start_line_num++;
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start = start_line_num * width + 10;
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end = (start_line_num+1) * width - w - 5;
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if (end > pos[0].end) end = pos[0].end;
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pos.push({ start: start, end: end });
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}
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}
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// Set up multiple selections for ASCII
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var len = pos.length, line_num = 0;
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start = 0;
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end = 0;
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for (var i = 1; i < len; i++) {
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line_num = Math.floor(pos[i].start / width);
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start = (((pos[i].start - (line_num * width)) - 10) / 3) + (width - w -2) + (line_num * width);
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end = (((pos[i].end + 1 - (line_num * width)) - 10) / 3) + (width - w -2) + (line_num * width);
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pos.push({ start: start, end: end });
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}
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return pos;
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},
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/**
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* Highlight from hexdump
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlight_from: function(pos, args) {
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var w = args[0] || 16;
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var width = 14 + (w*4);
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var line = Math.floor(pos[0].start / width);
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var offset = pos[0].start % width;
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if (offset < 10) { // In line number section
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pos[0].start = line*w;
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} else if (offset > 10+(w*3)) { // In ASCII section
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pos[0].start = (line+1)*w;
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} else { // In byte section
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pos[0].start = line*w + Math.floor((offset-10)/3);
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}
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line = Math.floor(pos[0].end / width);
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offset = pos[0].end % width;
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if (offset < 10) { // In line number section
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pos[0].end = line*w;
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} else if (offset > 10+(w*3)) { // In ASCII section
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pos[0].end = (line+1)*w;
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} else { // In byte section
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pos[0].end = line*w + Math.ceil((offset-10)/3);
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}
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return pos;
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},
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};
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</pre>
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</article>
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</section>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.3</a>
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