mirror of
https://github.com/cedricbonhomme/Stegano.git
synced 2025-05-12 09:08:31 +02:00
258 lines
7.1 KiB
ReStructuredText
258 lines
7.1 KiB
ReStructuredText
Using Stéganô in command line
|
|
=============================
|
|
|
|
The command ``stegano-lsb``
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
Hide and reveal a message with the LSB method.
|
|
|
|
Display help
|
|
------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-lsb --help
|
|
usage: stegano-lsb [-h] {hide,reveal} ...
|
|
|
|
positional arguments:
|
|
{hide,reveal} sub-command help
|
|
hide hide help
|
|
reveal reveal help
|
|
|
|
optional arguments:
|
|
-h, --help show this help message and exit
|
|
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-lsb hide --help
|
|
usage: stegano-lsb hide [-h] -i INPUT_IMAGE_FILE [-e {UTF-8,UTF-32LE}]
|
|
(-m SECRET_MESSAGE | -f SECRET_FILE) -o
|
|
OUTPUT_IMAGE_FILE
|
|
|
|
optional arguments:
|
|
-h, --help show this help message and exit
|
|
-i INPUT_IMAGE_FILE, --input INPUT_IMAGE_FILE
|
|
Input image file.
|
|
-e {UTF-8,UTF-32LE}, --encoding {UTF-8,UTF-32LE}
|
|
Specify the encoding of the message to hide. UTF-8
|
|
(default) or UTF-32LE.
|
|
-m SECRET_MESSAGE Your secret message to hide (non binary).
|
|
-f SECRET_FILE Your secret to hide (Text or any binary file).
|
|
-o OUTPUT_IMAGE_FILE, --output OUTPUT_IMAGE_FILE
|
|
Output image containing the secret.
|
|
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-lsb reveal --help
|
|
usage: stegano-lsb reveal [-h] -i INPUT_IMAGE_FILE [-e {UTF-8,UTF-32LE}]
|
|
[-o SECRET_BINARY]
|
|
|
|
optional arguments:
|
|
-h, --help show this help message and exit
|
|
-i INPUT_IMAGE_FILE, --input INPUT_IMAGE_FILE
|
|
Input image file.
|
|
-e {UTF-8,UTF-32LE}, --encoding {UTF-8,UTF-32LE}
|
|
Specify the encoding of the message to reveal. UTF-8
|
|
(default) or UTF-32LE.
|
|
-o SECRET_BINARY Output for the binary secret (Text or any binary
|
|
file).
|
|
|
|
|
|
Hide and reveal a text message
|
|
------------------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-lsb hide -i ./tests/sample-files/Lenna.png -m 'Hello World!' -o ./Lenna_enc.png
|
|
$ stegano-lsb reveal -i ./Lenna_enc.png
|
|
Hello World!
|
|
|
|
Specify an encoding
|
|
-------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-lsb hide -i ./tests/sample-files/Lenna.png -m 'I love 🍕 and 🍫.' -e UTF-32LE -o ./Lenna_enc.png
|
|
$ stegano-lsb reveal -i ./Lenna_enc.png
|
|
I love 🍕 and 🍫.
|
|
|
|
The default encoding is UTF-8.
|
|
|
|
Hide and reveal a binary file
|
|
-----------------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ wget http://www.gnu.org/music/free-software-song.ogg
|
|
$ stegano-lsb hide -i ./tests/sample-files/Montenach.png -f ./free-software-song.ogg -o ./Montenach_enc.png
|
|
$ rm free-software-song.ogg
|
|
$ stegano-lsb reveal -i ./Montenach_enc.png -o ./song.ogg
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The command ``stegano-lsb-set``
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
Sets are used in order to select the pixels where the message will be hidden.
|
|
|
|
Hide and reveal a text message
|
|
------------------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
# Hide the message with the Sieve of Eratosthenes
|
|
$ stegano-lsb-set hide -i ./tests/sample-files/Montenach.png --generator eratosthenes -m 'Joyeux Noël!' -o ./surprise.png
|
|
|
|
# Try to reveal with Mersenne numbers
|
|
$ stegano-lsb-set reveal --generator mersenne -i ./surprise.png
|
|
|
|
# Try to reveal with fermat numbers
|
|
$ stegano-lsb-set reveal --generator fermat -i ./surprise.png
|
|
|
|
# Try to reveal with carmichael numbers
|
|
$ stegano-lsb-set reveal --generator carmichael -i ./surprise.png
|
|
|
|
# Try to reveal with Sieve of Eratosthenes
|
|
$ stegano-lsb-set reveal --generator eratosthenes -i ./surprise.png
|
|
|
|
An other example:
|
|
|
|
.. code-block:: bash
|
|
|
|
# Hide the message - LSB with a set defined by the identity function (f(x) = x).
|
|
stegano-lsb-set hide -i ./tests/sample-files/Montenach.png --generator identity -m 'I like steganography.' -o ./enc-identity.png
|
|
|
|
# Hide the message - LSB only.
|
|
stegano-lsb hide -i ./tests/sample-files/Montenach.png -m 'I like steganography.' -o ./enc.png
|
|
|
|
# Check if the two generated files are the same.
|
|
sha1sum ./enc-identity.png ./enc.png
|
|
|
|
# The output of lsb is given to lsb-set.
|
|
stegano-lsb-set reveal -i ./enc.png --generator identity
|
|
|
|
# The output of lsb-set is given to lsb.
|
|
stegano-lsb reveal -i ./enc-identity.png
|
|
|
|
|
|
Sometimes it can be useful to skip the first values of a set. For example if you want
|
|
to hide several messages or because due to the selected generator
|
|
(Fibonacci starts with 0, 1, 1, etc.). Or maybe you just want to add more complexity.
|
|
In this case, simply use the optional arguments ``--shift``:
|
|
|
|
|
|
.. code-block:: bash
|
|
|
|
stegano-lsb-set reveal -i ./tests/sample-files/Lenna.png --generator fibonacci --shift 7
|
|
|
|
|
|
List all available generators
|
|
------------------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-lsb-set list-generators
|
|
Generator id:
|
|
ackermann
|
|
Desciption:
|
|
Ackermann number.
|
|
|
|
Generator id:
|
|
ackermann_naive
|
|
Desciption:
|
|
Ackermann number.
|
|
|
|
Generator id:
|
|
carmichael
|
|
Desciption:
|
|
Composite numbers n such that a^(n-1) == 1 (mod n) for every a coprime
|
|
to n.
|
|
https://oeis.org/A002997
|
|
|
|
Generator id:
|
|
composite
|
|
Desciption:
|
|
Generate the composite numbers using the sieve of Eratosthenes.
|
|
https://oeis.org/A002808
|
|
|
|
Generator id:
|
|
eratosthenes
|
|
Desciption:
|
|
Generate the prime numbers with the sieve of Eratosthenes.
|
|
https://oeis.org/A000040
|
|
|
|
Generator id:
|
|
fermat
|
|
Desciption:
|
|
Generate the n-th Fermat Number.
|
|
https://oeis.org/A000215
|
|
|
|
Generator id:
|
|
fibonacci
|
|
Desciption:
|
|
Generate the sequence of Fibonacci.
|
|
https://oeis.org/A000045
|
|
|
|
Generator id:
|
|
identity
|
|
Desciption:
|
|
f(x) = x
|
|
|
|
Generator id:
|
|
log_gen
|
|
Desciption:
|
|
Logarithmic generator.
|
|
|
|
Generator id:
|
|
mersenne
|
|
Desciption:
|
|
Generate 2^p - 1, where p is prime.
|
|
https://oeis.org/A001348
|
|
|
|
Generator id:
|
|
triangular_numbers
|
|
Desciption:
|
|
Triangular numbers: a(n) = C(n+1,2) = n(n+1)/2 = 0+1+2+...+n.
|
|
http://oeis.org/A000217
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The command ``stegano-red``
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
Hide and reveal a text message with the red portion of a pixel.
|
|
|
|
Display help
|
|
------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-red hide --help
|
|
usage: stegano-red hide [-h] [-i INPUT_IMAGE_FILE] [-m SECRET_MESSAGE]
|
|
[-o OUTPUT_IMAGE_FILE]
|
|
|
|
optional arguments:
|
|
-h, --help show this help message and exit
|
|
-i INPUT_IMAGE_FILE, --input INPUT_IMAGE_FILE
|
|
Image file
|
|
-m SECRET_MESSAGE Your secret message to hide (non binary).
|
|
-o OUTPUT_IMAGE_FILE, --output OUTPUT_IMAGE_FILE
|
|
Image file
|
|
|
|
Hide and reveal a text message
|
|
------------------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ stegano-red hide -i ./tests/sample-files/Lenna.png -m 'Basic steganography technique.' -o ~/Lenna1.png
|
|
$ stegano-red reveal -i ~/Lenna1.png
|
|
Basic steganography technique.
|