s739

Steganography tool

Features

• Image containers:
  • 8-bit RGB/RGBA PNG
  • JPEG
• Supports plain text, files and stdin
• LSB algorithm
• Secret key for random steps between pixels
• Shell completions

Installation

Static build from releases

curl -sL https://github.com/vvh413/s739/releases/latest/download/s739 --output ~/.local/bin/s739
chmod +x ~/.local/bin/s739

Build from source

git clone https://github.com/vvh413/s739
cd s739
cargo install --path . --features cli

Shell completions

Add the following to your shell config file (~/.bashrc, ~/.zshrc, etc.):

• bash:

eval "$(s739 generate bash)"

• zsh:

eval "$(s739 generate zsh)"

• fish:

s739 generate fish | source

Supported shells: bash, zsh, fish, elvish, powershell.

Usage

$ s739 -h 
Steganography tool

Usage: s739 <COMMAND>

Commands:
  encode    Encode data to image
  decode    Decode data from image
  generate  Generate shell completions
  help      Print this message or the help of the given subcommand(s)

Options:
  -h, --help     Print help
  -V, --version  Print version

Encode

$ s739 encode -h 
Encode data to image

Usage: s739 encode [OPTIONS] --input <INPUT> --output <OUTPUT> <--text <TEXT>|--file <FILE>|--stdin>

Options:
  -i, --input <INPUT>
          Input file
  -o, --output <OUTPUT>
          Output file
      --png-compression <COMPRESSION>
          PNG compression type [default: fast] [possible values: default, fast, best]
      --png-filter <FILTER>
          PNG filter type [default: adaptive] [possible values: no, sub, up, avg, paeth, adaptive]
      --jpeg-compress-profile <COMPRESS_PROFILE>
          MozJPEG compression profile [default: max] [possible values: max, fastest]
  -t, --text <TEXT>
          Encode plain text data
  -f, --file <FILE>
          Encode file
  -s, --stdin
          Read data from stdin
  -k, --key <KEY>
          Secret key
      --selective
          Skip some DCT coefs for JPEG
      --depth <DEPTH>
          Depth (least bit to use) [default: 0]
      --bits <BITS>
          Number of bits per single image unit (pixel/DCT coef) [default: 1]
      --jpeg-comp <JPEG_COMP>
          JPEG component index
      --max-step <MAX_STEP>
          Overwrite calculated max step
  -h, --help
          Print help

Decode

$ s739 decode -h
Decode data from image

Usage: s739 decode [OPTIONS] --input <INPUT>

Options:
  -i, --input <INPUT>          Input file
  -f, --file <FILE>            Write data to file
  -k, --key <KEY>              Secret key
      --selective              Skip some DCT coefs for JPEG
      --depth <DEPTH>          Depth (least bit to use) [default: 0]
      --bits <BITS>            Number of bits per single image unit (pixel/DCT coef) [default: 1]
      --jpeg-comp <JPEG_COMP>  JPEG component index
      --max-step <MAX_STEP>    Overwrite calculated max step
  -h, --help                   Print help