mirror of
https://github.com/gchq/CyberChef.git
synced 2024-09-07 12:11:35 +02:00
162 lines
5.3 KiB
JavaScript
162 lines
5.3 KiB
JavaScript
/**
|
|
* @author n1474335 [n1474335@gmail.com]
|
|
* @copyright Crown Copyright 2016
|
|
* @license Apache-2.0
|
|
*/
|
|
|
|
import Operation from "../Operation";
|
|
|
|
/**
|
|
* Generic Code Beautify operation
|
|
*/
|
|
class GenericCodeBeautify extends Operation {
|
|
|
|
/**
|
|
* GenericCodeBeautify constructor
|
|
*/
|
|
constructor() {
|
|
super();
|
|
|
|
this.name = "Generic Code Beautify";
|
|
this.module = "Code";
|
|
this.description = "Attempts to pretty print C-style languages such as C, C++, C#, Java, PHP, JavaScript etc.<br><br>This will not do a perfect job, and the resulting code may not work any more. This operation is designed purely to make obfuscated or minified code more easy to read and understand.<br><br>Things which will not work properly:<ul><li>For loop formatting</li><li>Do-While loop formatting</li><li>Switch/Case indentation</li><li>Certain bit shift operators</li></ul>";
|
|
this.inputType = "string";
|
|
this.outputType = "string";
|
|
this.args = [];
|
|
}
|
|
|
|
/**
|
|
* @param {string} input
|
|
* @param {Object[]} args
|
|
* @returns {string}
|
|
*/
|
|
run(input, args) {
|
|
const preservedTokens = [];
|
|
let code = input,
|
|
t = 0,
|
|
m;
|
|
|
|
// Remove strings
|
|
const sstrings = /'([^'\\]|\\.)*'/g;
|
|
while ((m = sstrings.exec(code))) {
|
|
code = preserveToken(code, m, t++);
|
|
sstrings.lastIndex = m.index;
|
|
}
|
|
|
|
const dstrings = /"([^"\\]|\\.)*"/g;
|
|
while ((m = dstrings.exec(code))) {
|
|
code = preserveToken(code, m, t++);
|
|
dstrings.lastIndex = m.index;
|
|
}
|
|
|
|
// Remove comments
|
|
const scomments = /\/\/[^\n\r]*/g;
|
|
while ((m = scomments.exec(code))) {
|
|
code = preserveToken(code, m, t++);
|
|
scomments.lastIndex = m.index;
|
|
}
|
|
|
|
const mcomments = /\/\*[\s\S]*?\*\//gm;
|
|
while ((m = mcomments.exec(code))) {
|
|
code = preserveToken(code, m, t++);
|
|
mcomments.lastIndex = m.index;
|
|
}
|
|
|
|
const hcomments = /(^|\n)#[^\n\r#]+/g;
|
|
while ((m = hcomments.exec(code))) {
|
|
code = preserveToken(code, m, t++);
|
|
hcomments.lastIndex = m.index;
|
|
}
|
|
|
|
// Remove regexes
|
|
const regexes = /\/.*?[^\\]\/[gim]{0,3}/gi;
|
|
while ((m = regexes.exec(code))) {
|
|
code = preserveToken(code, m, t++);
|
|
regexes.lastIndex = m.index;
|
|
}
|
|
|
|
code = code
|
|
// Create newlines after ;
|
|
.replace(/;/g, ";\n")
|
|
// Create newlines after { and around }
|
|
.replace(/{/g, "{\n")
|
|
.replace(/}/g, "\n}\n")
|
|
// Remove carriage returns
|
|
.replace(/\r/g, "")
|
|
// Remove all indentation
|
|
.replace(/^\s+/g, "")
|
|
.replace(/\n\s+/g, "\n")
|
|
// Remove trailing spaces
|
|
.replace(/\s*$/g, "")
|
|
.replace(/\n{/g, "{");
|
|
|
|
// Indent
|
|
let i = 0,
|
|
level = 0,
|
|
indent;
|
|
while (i < code.length) {
|
|
switch (code[i]) {
|
|
case "{":
|
|
level++;
|
|
break;
|
|
case "\n":
|
|
if (i+1 >= code.length) break;
|
|
|
|
if (code[i+1] === "}") level--;
|
|
indent = (level >= 0) ? Array(level*4+1).join(" ") : "";
|
|
|
|
code = code.substring(0, i+1) + indent + code.substring(i+1);
|
|
if (level > 0) i += level*4;
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
code = code
|
|
// Add strategic spaces
|
|
.replace(/\s*([!<>=+-/*]?)=\s*/g, " $1= ")
|
|
.replace(/\s*<([=]?)\s*/g, " <$1 ")
|
|
.replace(/\s*>([=]?)\s*/g, " >$1 ")
|
|
.replace(/([^+])\+([^+=])/g, "$1 + $2")
|
|
.replace(/([^-])-([^-=])/g, "$1 - $2")
|
|
.replace(/([^*])\*([^*=])/g, "$1 * $2")
|
|
.replace(/([^/])\/([^/=])/g, "$1 / $2")
|
|
.replace(/\s*,\s*/g, ", ")
|
|
.replace(/\s*{/g, " {")
|
|
.replace(/}\n/g, "}\n\n")
|
|
// Hacky horribleness
|
|
.replace(/(if|for|while|with|elif|elseif)\s*\(([^\n]*)\)\s*\n([^{])/gim, "$1 ($2)\n $3")
|
|
.replace(/(if|for|while|with|elif|elseif)\s*\(([^\n]*)\)([^{])/gim, "$1 ($2) $3")
|
|
.replace(/else\s*\n([^{])/gim, "else\n $1")
|
|
.replace(/else\s+([^{])/gim, "else $1")
|
|
// Remove strategic spaces
|
|
.replace(/\s+;/g, ";")
|
|
.replace(/\{\s+\}/g, "{}")
|
|
.replace(/\[\s+\]/g, "[]")
|
|
.replace(/}\s*(else|catch|except|finally|elif|elseif|else if)/gi, "} $1");
|
|
|
|
// Replace preserved tokens
|
|
const ptokens = /###preservedToken(\d+)###/g;
|
|
while ((m = ptokens.exec(code))) {
|
|
const ti = parseInt(m[1], 10);
|
|
code = code.substring(0, m.index) + preservedTokens[ti] + code.substring(m.index + m[0].length);
|
|
ptokens.lastIndex = m.index;
|
|
}
|
|
|
|
return code;
|
|
|
|
/**
|
|
* Replaces a matched token with a placeholder value.
|
|
*/
|
|
function preserveToken(str, match, t) {
|
|
preservedTokens[t] = match[0];
|
|
return str.substring(0, match.index) +
|
|
"###preservedToken" + t + "###" +
|
|
str.substring(match.index + match[0].length);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
export default GenericCodeBeautify;
|