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92 lines
3.2 KiB
ReStructuredText
92 lines
3.2 KiB
ReStructuredText
Using Stéganô in command line for your scripts
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==============================================
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Display help
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------------
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.. code-block:: bash
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$ slsb --help
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Usage: slsb [options]
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Options:
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--version show program's version number and exit
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-h, --help show this help message and exit
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--hide Hides a message in an image.
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--reveal Reveals the message hided in an image.
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-i INPUT_IMAGE_FILE, --input=INPUT_IMAGE_FILE
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Input image file.
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-o OUTPUT_IMAGE_FILE, --output=OUTPUT_IMAGE_FILE
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Output image containing the secret.
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-m SECRET_MESSAGE, --secret-message=SECRET_MESSAGE
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Your secret message to hide (non binary).
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-f SECRET_FILE, --secret-file=SECRET_FILE
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Your secret to hide (Text or any binary file).
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-b SECRET_BINARY, --binary=SECRET_BINARY
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Output for the binary secret (Text or any binary
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file).
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Hide and reveal a text message with the LSB method
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--------------------------------------------------
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.. code-block:: bash
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$ lsb --hide -i ./tests/sample-files/Lenna.png -o ./Lenna_enc.png -m HelloWorld!
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$ lsb --reveal -i ./Lenna_enc.png
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HelloWorld!
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Hide and reveal a binary file
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-----------------------------
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.. code-block:: bash
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$ wget http://www.gnu.org/music/free-software-song.ogg
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$ lsb --hide -i ./tests/sample-files/Montenach.png -o ./Montenach_enc.png -f ./free-software-song.ogg
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$ rm free-software-song.ogg
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$ lsb --reveal -i ./Montenach_enc.png -b ./song.ogg
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Hide and reveal a text message with the LSB method and generated sets
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---------------------------------------------------------------------
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Sets are used in order to select the pixels where the message will be hidden.
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.. code-block:: bash
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echo "Hide the message with the Sieve of Eratosthenes..."
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lsb-set --hide -i ./tests/sample-files/Montenach.png -o ./surprise.png --generator eratosthenes -m 'Joyeux Noël!'
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echo ""
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echo "Try to reveal with Mersenne numbers..."
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lsb-set --reveal --generator mersenne -i ./surprise.png
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echo ""
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echo "Try to reveal with fermat numbers..."
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lsb-set --reveal --generator fermat -i ./surprise.png
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echo ""
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echo "Try to reveal with carmichael numbers..."
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lsb-set --reveal --generator carmichael -i ./surprise.png
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echo ""
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echo "Try to reveal with Sieve of Eratosthenes..."
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lsb-set --reveal --generator eratosthenes -i ./surprise.png
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An other example:
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.. code-block:: bash
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# Hide the message - LSB with a set defined by the identity function (f(x) = x).
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lsb-set --hide -i ./tests/sample-files/Montenach.png -o ./enc-identity.png --generator identity -m 'I like steganography.'
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# Hide the message - LSB only.
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lsb --hide -i ./tests/sample-files/Montenach.png -o ./enc.png -m 'I like steganography.'
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# Check if the two generated files are the same.
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sha1sum ./enc-identity.png ./enc.png
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# The output of lsb is given to lsb-set.
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lsb-set --reveal -i ./enc.png --generator identity
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# The output of lsb-set is given to lsb.
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lsb --reveal -i ./enc-identity.png
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