poltergeist 👻

There are 26 unique whitespace characters supported in unicode. This is enough to represent every latin letter as whitespace, but to make this PoC more robust we instead use the 16 characters used in hexadecimal.

This tool can be used to encode and decode text as whitespace. This can be useful for steganography or creating unreadable text.

Install

go install github.com/shell-company/poltergeist/cmd/poltergeist@latest

Usage

To encode:

./poltergeist -encode -file <input_file>

OR

<script> | ./poltergeist -encode -stdin

To decode:

./poltergeist -decode -file <input_file> -stdin

OR

<script> | ./poltergeist -decode -stdin

Flags

-encode: Encode text as whitespace
-decode: Decode text from whitespace
-file: Specify an input file. If stdin is specified, this flag is ignored.
-stdin: Read from stdin.
-test: Print the table of whitespace characters to see how your shell interprets them

Example

To encode the text "Hello world":

./poltergeist -encode -file input.txt

To decode the text:

./poltergeist -decode -file output.txt

Character table

The following table shows the 26 unique whitespace characters and their descriptions

character	description
\u0009	CHARACTER TABULATION
\u000A	LINE FEED (LF)
\u000B	LINE TABULATION
\u000C	FORM FEED (FF)
\u000D	CARRIAGE RETURN (CR)
\u0020	SPACE
\u0085	NEXT LINE (NEL)
\u00A0	NO-BREAK SPACE
\u1680	OGHAM SPACE MARK
\u2000	EN QUAD
\u2001	EM QUAD
\u2002	EN SPACE
\u2003	EM SPACE
\u2004	THREE-PER-EM SPACE
\u2005	FOUR-PER-EM SPACE
\u2006	SIX-PER-EM SPACE
\u2007	FIGURE SPACE
\u2008	PUNCTUATION SPACE
\u2009	THIN SPACE
\u200A	HAIR SPACE
\u2028	LINE SEPARATOR
\u2029	PARAGRAPH SEPARATOR
\u202F	NARROW NO-BREAK SPACE
\u205F	MEDIUM MATHEMATICAL SPACE
\u3000	IDEOGRAPHIC SPACE
\uFEFF	ZERO WIDTH NO-BREAK SPACE

To-Do

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