mirror of
https://github.com/gchq/CyberChef.git
synced 2024-11-02 22:21:01 +01:00
Added decoder for chunked HTTP encoding
This decoder will join up a HTTP response sent using chunked transfer encoding, raised in issue #168. This is useful when attempting to extract files or gzipped responses sent using chunked transfer encoding, particularly when combined with the gunzip operation.
This commit is contained in:
parent
c29ea53405
commit
53bf52c989
@ -137,6 +137,7 @@
|
|||||||
"ops": [
|
"ops": [
|
||||||
"HTTP request",
|
"HTTP request",
|
||||||
"Strip HTTP headers",
|
"Strip HTTP headers",
|
||||||
|
"Dechunk HTTP response",
|
||||||
"Parse User Agent",
|
"Parse User Agent",
|
||||||
"Parse IP range",
|
"Parse IP range",
|
||||||
"Parse IPv6 address",
|
"Parse IPv6 address",
|
||||||
|
@ -2239,6 +2239,13 @@ const OP_CONFIG = {
|
|||||||
outputType: "string",
|
outputType: "string",
|
||||||
args: []
|
args: []
|
||||||
},
|
},
|
||||||
|
"Dechunk HTTP response": {
|
||||||
|
module: "HTTP",
|
||||||
|
description: "Parses a HTTP response transferred using transfer-encoding:chunked",
|
||||||
|
inputType: "string",
|
||||||
|
outputType: "string",
|
||||||
|
args: []
|
||||||
|
},
|
||||||
"Parse User Agent": {
|
"Parse User Agent": {
|
||||||
module: "HTTP",
|
module: "HTTP",
|
||||||
description: "Attempts to identify and categorise information contained in a user-agent string.",
|
description: "Attempts to identify and categorise information contained in a user-agent string.",
|
||||||
|
50
src/core/operations/DechunkHTTP.mjs
Normal file
50
src/core/operations/DechunkHTTP.mjs
Normal file
@ -0,0 +1,50 @@
|
|||||||
|
/**
|
||||||
|
* @author sevzero [sevzero@protonmail.com]
|
||||||
|
* @copyright Crown Copyright 2016
|
||||||
|
* @license Apache-2.0
|
||||||
|
*/
|
||||||
|
|
||||||
|
import Operation from "../Operation";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Dechunk HTTP response operation
|
||||||
|
*/
|
||||||
|
class DechunkHTTP extends Operation {
|
||||||
|
|
||||||
|
/**
|
||||||
|
* DechunkHTTP constructor
|
||||||
|
*/
|
||||||
|
constructor() {
|
||||||
|
super();
|
||||||
|
|
||||||
|
this.name = "Dechunk HTTP response";
|
||||||
|
this.module = "Default";
|
||||||
|
this.description = "Parses a HTTP response transferred using transfer-encoding:chunked";
|
||||||
|
this.inputType = "string";
|
||||||
|
this.outputType = "string";
|
||||||
|
this.args = [];
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} input
|
||||||
|
* @param {Object[]} args
|
||||||
|
* @returns {string}
|
||||||
|
*/
|
||||||
|
run(input, args) {
|
||||||
|
var chunks = [];
|
||||||
|
var chunkSizeEnd = input.indexOf("\n") + 1;
|
||||||
|
var lineEndings = input.charAt(chunkSizeEnd - 2) == "\r" ? "\r\n" : "\n";
|
||||||
|
var lineEndingsLength = lineEndings.length;
|
||||||
|
var chunkSize = parseInt(input.slice(0, chunkSizeEnd), 16);
|
||||||
|
while (!isNaN(chunkSize)) {
|
||||||
|
chunks.push(input.slice(chunkSizeEnd, chunkSize + chunkSizeEnd));
|
||||||
|
input = input.slice(chunkSizeEnd + chunkSize + lineEndingsLength);
|
||||||
|
chunkSizeEnd = input.indexOf(lineEndings) + lineEndingsLength;
|
||||||
|
chunkSize = parseInt(input.slice(0, chunkSizeEnd), 16);
|
||||||
|
}
|
||||||
|
return chunks.join('') + input;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
export default DechunkHTTP;
|
@ -37,6 +37,27 @@ const HTTP = {
|
|||||||
return (headerEnd < 2) ? input : input.slice(headerEnd, input.length);
|
return (headerEnd < 2) ? input : input.slice(headerEnd, input.length);
|
||||||
},
|
},
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Dechunk response operation
|
||||||
|
*
|
||||||
|
* @param {string} input
|
||||||
|
* @param {Object[]} args}
|
||||||
|
* @returns {string}
|
||||||
|
*/
|
||||||
|
runDechunk: function(input, args) {
|
||||||
|
var chunks = [];
|
||||||
|
var chunkSizeEnd = input.indexOf("\n") + 1;
|
||||||
|
var lineEndings = input.charAt(chunkSizeEnd - 2) == "\r" ? "\r\n" : "\n";
|
||||||
|
var lineEndingsLength = lineEndings.length;
|
||||||
|
var chunkSize = parseInt(input.slice(0, chunkSizeEnd), 16);
|
||||||
|
while (!isNaN(chunkSize)) {
|
||||||
|
chunks.push(input.slice(chunkSizeEnd, chunkSize + chunkSizeEnd));
|
||||||
|
input = input.slice(chunkSizeEnd + chunkSize + lineEndingsLength);
|
||||||
|
chunkSizeEnd = input.indexOf(lineEndings) + lineEndingsLength;
|
||||||
|
chunkSize = parseInt(input.slice(0, chunkSizeEnd), 16);
|
||||||
|
}
|
||||||
|
return chunks.join('') + input;
|
||||||
|
},
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* Parse User Agent operation.
|
* Parse User Agent operation.
|
||||||
|
Loading…
Reference in New Issue
Block a user