LSB steganography

In this repository, you can find the source code for LSB steganography implemented in Go.

Demo

Original	Encoded

The second image contains Jason Statham meme quote from file message.txt.

How to use

Makefile help message:

$ make help
Available commands:
        make help               - print this help
        make build              - build executable
        make clean              - clean build directory
        make test               - run tests

After executing make build, you can find the compiled binary in the build directory.

$ make build
...
$ tree build
build
└── lsb

More information about this CLI application can be found in the help message:

$ ./build/lsb
NAME:
   lsb - Tool for LSB steganography on images

USAGE:
   lsb [global options] [command [command options]]

VERSION:
   0.0.1

AUTHOR:
   ptrvsrg

COMMANDS:
   encode, e, E  encode a message to a given image file
   decode, d, D  decode a message from a given image file
   help, h       Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --help, -h     show help
   --version, -v  print the version

COPYRIGHT:
   © 2024 ptrvsrg

$ ./build/lsb help encode
NAME:
   lsb encode - encode a message to a given image file

USAGE:
   lsb encode

OPTIONS:
   --message value, -m value, -M value           message
   --message-file value, --im value, --IM value  input message path
   --input-file value, -i value, -I value        input image path
   --output-file value, -o value, -O value       output image path
   --help, -h                                    show help

$ ./build/lsb help decode                                                                                                                                   
NAME:
   lsb decode - decode a message from a given image file

USAGE:
   lsb decode

OPTIONS:
   --input-file value, -i value, -I value        input image path
   --message-file value, --om value, --OM value  output message path
   --help, -h                                    show help

Testing

$ make test
?       steganography/cmd/lsb   [no test files]
?       steganography/internal/helper   [no test files]
=== RUN   TestEncodeFromPngFile
--- PASS: TestEncodeFromPngFile (0.11s)
=== RUN   TestDecodeFromPngFile
--- PASS: TestDecodeFromPngFile (0.02s)
=== RUN   TestEncodeFromJpgFile
--- PASS: TestEncodeFromJpgFile (0.04s)
=== RUN   TestDecodeFromJpgFile
--- PASS: TestDecodeFromJpgFile (0.01s)
=== RUN   TestEncodeFromJpegFile
--- PASS: TestEncodeFromJpegFile (0.01s)
=== RUN   TestDecodeFromJpegFile
--- PASS: TestDecodeFromJpegFile (0.00s)
PASS
ok      steganography/internal/lsb      0.668s

License

This project is released under the MIT License.