49 lines
1.7 KiB
Markdown
49 lines
1.7 KiB
Markdown
# steganoCode
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Steganography in source code
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```
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usage: stego.py [-h] [--input INPUT] [--output OUTPUT] [--stdin] [--stdout] [--hide] [--showSource] [--showFound]
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[--lang LANG] [--message MESSAGE] [--comment COMMENT]
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optional arguments:
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-h, --help show this help message and exit
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--input INPUT Input file
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--output OUTPUT Output file
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--stdin Read from stdin
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--stdout Output to stdout
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--hide Hide Mode
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--showSource Show clean source
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--showFound Show Matches
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--lang LANG Programming Language
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--message MESSAGE Hidden message
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--comment COMMENT Comment
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```
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This tools encodes secret messages in a comment, which is appended at the start of the output
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## Encoding
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The message is first commuted from unicode to binary and then to a sequence of these two invisible unicode characters:
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* `U+200F RIGHT-TO-LEFT MARK` for binary digit `1`
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* `U+200E LEFT-TO-RIGHT MARK` fot binary digit `0`
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The last char in the sequence is always ignored in decoding and is `U+200F RIGHT-TO-LEFT MARK` (to restore the correct reading order that the previous char would impart)
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A comment is created, accounting for the programming language and placed at the top of the output.
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The comment contains the message payload followed optionally by a text comment
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## Decoding
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Every sequence of the two designated chars is stored and decoded.
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if `showSource` is enabled, then the source output contains the original message in the comments where it appears
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if `showFound` is enabled, the output contains all the decoded instances
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### example
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[](https://asciinema.org/a/430713)
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