fanger

fanger is an npm package for defang and refang IoC.

What are defang and refang

Defang means to change a part of IoC to make inaccessible or unclickable. (e.g. example.com => example[.]com)

Refang means to revert a defanged IoC to the original one. (e.g. example[.]com => example.com)

Installation

npm install fanger -g

Usage

As a CLI

$ echo "example.com" | defang
example[.]com

$ echo "[email protected]" | defang
test@example[.]com

$ echo "https://example.com" | defang
hxxps://example[.]com

$ echo "example[.]com" | refang
example.com

$ echo "test@example[.]com" | refang
[email protected]

$ echo "hxxps://example[.]com" | refang
https://example.com

As a library

import { defang, refang } from "fanger";

const text = "example.com";
console.log(defang(text));
// example[.]com

const defangedText = "example[.]com";
console.log(refang(defangedText));
// example.com

Supported defang/refang techniques

Defang

The following defang techniques are supported.

IPv4

• 1.1.1.1 => 1[.]1.1.1

The first dot of an IPv4 will be replaced with [.].

Domain

• example.com => example[.]com
• test.com.example.com => test[.]com.example[.]com

A dot before a label which is registered as a TLD will be replaced with [.].

HTTP scheme

• http => hxxp
• https => hxxps

Supported refang techniques

The following refang techniques are supported.

| Techniques | Defanged | Refanged | |------------------|----------------------------------------|---------------------------------| | Remove spaces | 1.1.1 . 1 | 1.1.1.1 | | [.] => . | 1.1.1[.]1 | 1.1.1.1 | | (.) => . | 1.1.1(.)1 | 1.1.1.1 | | {.} => . | 1.1.1{.}1 | 1.1.1.1 | | \. => . | example\.com | example.com | | [/] => / | http://example.com[/]path | http://example.com/path | | [:] => : | http[:]//example.com | http://example.com | | [://] => :// | http[://]example.com | http://example.com | | hxxp => http | hxxps://google.com | https://google.com | | [at] => @ | test[at]example.com | [email protected] | | [@] => @ | test[@]example.com | [email protected] | | (@) => @ | test(@)example.com | [email protected] | | [dot] => . | test@example[dot]com | [email protected] | | (dot) => . | test@example(dot)com | [email protected] | | {dot} => . | test@example{dot}com | [email protected] | | Partial | 1.1.1[.1 | 1.1.1.1 | | Any combination | hxxps[:]//test\.example[.)com[/]path | https://test.example.com/path |