mirror of
https://github.com/cedricbonhomme/Stegano.git
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Merge pull request #22 from sh4nks/master
Pass Image.Image instance to 'hide' and 'reveal' methods
This commit is contained in:
Cédric
GitHub
commit
c5b7df87f5
6 changed files with 205 additions and 124 deletions
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@ -25,10 +25,17 @@ __date__ = "$Date: 2016/05/26 $"
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__revision__ = "$Date: 2017/01/18 $"
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__license__ = "GPLv3"
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from PIL import Image
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import piexif
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from stegano import tools
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def hide(input_image_file, img_enc, secret_message = None, secret_file = None, img_format = None):
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def hide(
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input_image_file,
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img_enc,
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secret_message=None,
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secret_file=None,
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img_format=None,
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):
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"""Hide a message (string) in an image.
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"""
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from zlib import compress
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@ -43,7 +50,7 @@ def hide(input_image_file, img_enc, secret_message = None, secret_file = None, i
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except:
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text = compress(b64encode(secret_message))
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img = Image.open(input_image_file)
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img = tools.open_image(input_image_file)
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if img_format is None:
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img_format = img.format
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@ -66,15 +73,16 @@ def reveal(input_image_file):
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from base64 import b64decode
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from zlib import decompress
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img = Image.open(input_image_file)
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img = tools.open_image(input_image_file)
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try:
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if img.format in ['JPEG', 'TIFF']:
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if 'exif' in img.info:
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exif_dict = piexif.load(img.info.get("exif", b''))
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if img.format in ["JPEG", "TIFF"]:
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if "exif" in img.info:
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exif_dict = piexif.load(img.info.get("exif", b""))
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description_key = piexif.ImageIFD.ImageDescription
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encoded_message = exif_dict["0th"][description_key]
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else:
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encoded_message = b''
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encoded_message = b""
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else:
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raise ValueError("Given file is neither JPEG nor TIFF.")
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finally:
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@ -87,41 +95,70 @@ if __name__ == "__main__":
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# Point of entry in execution mode.
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# TODO: improve the management of arguments
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from optparse import OptionParser
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parser = OptionParser(version=__version__)
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parser.add_option('--hide', action='store_true', default=False,
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help="Hides a message in an image.")
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parser.add_option('--reveal', action='store_true', default=False,
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help="Reveals the message hided in an image.")
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parser.add_option(
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"--hide",
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action="store_true",
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default=False,
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help="Hides a message in an image.",
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)
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parser.add_option(
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"--reveal",
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action="store_true",
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default=False,
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help="Reveals the message hided in an image.",
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)
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# Original image
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parser.add_option("-i", "--input", dest="input_image_file",
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help="Input image file.")
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parser.add_option(
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"-i", "--input", dest="input_image_file", help="Input image file."
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)
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# Image containing the secret
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parser.add_option("-o", "--output", dest="output_image_file",
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help="Output image containing the secret.")
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parser.add_option(
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"-o",
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"--output",
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dest="output_image_file",
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help="Output image containing the secret.",
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)
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# Secret raw message to hide
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parser.add_option("-m", "--secret-message", dest="secret_message",
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help="Your raw secret message to hide.")
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parser.add_option(
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"-m",
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"--secret-message",
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dest="secret_message",
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help="Your raw secret message to hide.",
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)
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# Secret text file to hide.
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parser.add_option("-f", "--secret-file", dest="secret_file",
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help="Your secret text file to hide.")
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parser.add_option(
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"-f",
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"--secret-file",
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dest="secret_file",
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help="Your secret text file to hide.",
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)
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parser.set_defaults(input_image_file = './pictures/Elisha-Cuthbert.jpg',
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output_image_file = './pictures/Elisha-Cuthbert_enc.jpg',
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secret_message = '', secret_file = '')
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parser.set_defaults(
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input_image_file="./pictures/Elisha-Cuthbert.jpg",
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output_image_file="./pictures/Elisha-Cuthbert_enc.jpg",
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secret_message="",
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secret_file="",
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)
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(options, args) = parser.parse_args()
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if options.hide:
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if options.secret_message != "" and options.secret_file == "":
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hide(input_image_file=options.input_image_file, \
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img_enc=options.output_image_file, \
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secret_message=options.secret_message)
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hide(
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input_image_file=options.input_image_file,
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img_enc=options.output_image_file,
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secret_message=options.secret_message,
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)
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elif options.secret_message == "" and options.secret_file != "":
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hide(input_image_file=options.input_image_file, \
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img_enc=options.output_image_file, \
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secret_file=options.secret_file)
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hide(
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input_image_file=options.input_image_file,
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img_enc=options.output_image_file,
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secret_file=options.secret_file,
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)
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elif options.reveal:
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reveal(input_image_file=options.input_image_file)
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@ -25,33 +25,34 @@ __date__ = "$Date: 2016/08/04 $"
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__revision__ = "$Date: 2017/05/04 $"
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__license__ = "GPLv3"
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import sys
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from PIL import Image
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from typing import Union, IO
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from typing import IO, Union
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from stegano import tools
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def hide(input_image: Union[str, IO[bytes]],
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def hide(
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input_image: Union[str, IO[bytes]],
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message: str,
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encoding: str = 'UTF-8',
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auto_convert_rgb: bool = False):
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encoding: str = "UTF-8",
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auto_convert_rgb: bool = False,
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):
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"""Hide a message (string) in an image with the
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LSB (Least Significant Bit) technique.
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"""
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message_length = len(message)
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assert message_length != 0, "message length is zero"
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img = Image.open(input_image)
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img = tools.open_image(input_image)
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if img.mode not in ['RGB', 'RGBA']:
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if img.mode not in ["RGB", "RGBA"]:
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if not auto_convert_rgb:
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print('The mode of the image is not RGB. Mode is {}'.\
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format(img.mode))
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answer = input('Convert the image to RGB ? [Y / n]\n') or 'Y'
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if answer.lower() == 'n':
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raise Exception('Not a RGB image.')
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img = img.convert('RGB')
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print(
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"The mode of the image is not RGB. Mode is {}".format(img.mode)
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)
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answer = input("Convert the image to RGB ? [Y / n]\n") or "Y"
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if answer.lower() == "n":
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raise Exception("Not a RGB image.")
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img = img.convert("RGB")
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encoded = img.copy()
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width, height = img.size
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@ -59,13 +60,16 @@ def hide(input_image: Union[str, IO[bytes]],
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message = str(message_length) + ":" + str(message)
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message_bits = "".join(tools.a2bits_list(message, encoding))
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message_bits += '0' * ((3 - (len(message_bits) % 3)) % 3)
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message_bits += "0" * ((3 - (len(message_bits) % 3)) % 3)
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npixels = width * height
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len_message_bits = len(message_bits)
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if len_message_bits > npixels * 3:
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raise Exception("The message you want to hide is too long: {}". \
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format(message_length))
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raise Exception(
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"The message you want to hide is too long: {}".format(
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message_length
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)
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)
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for row in range(height):
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for col in range(width):
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if index + 3 <= len_message_bits:
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@ -82,7 +86,7 @@ def hide(input_image: Union[str, IO[bytes]],
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b = tools.setlsb(b, message_bits[index + 2])
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# Save the new pixel
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if img.mode == 'RGBA':
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if img.mode == "RGBA":
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encoded.putpixel((col, row), (r, g, b, pixel[3]))
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else:
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encoded.putpixel((col, row), (r, g, b))
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@ -93,10 +97,10 @@ def hide(input_image: Union[str, IO[bytes]],
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return encoded
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def reveal(input_image: Union[str, IO[bytes]], encoding='UTF-8'):
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def reveal(input_image: Union[str, IO[bytes]], encoding="UTF-8"):
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"""Find a message in an image (with the LSB technique).
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"""
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img = Image.open(input_image)
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img = tools.open_image(input_image)
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width, height = img.size
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buff, count = 0, 0
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bitab = []
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@ -106,7 +110,7 @@ def reveal(input_image: Union[str, IO[bytes]], encoding='UTF-8'):
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# pixel = [r, g, b] or [r,g,b,a]
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pixel = img.getpixel((col, row))
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if img.mode == 'RGBA':
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if img.mode == "RGBA":
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pixel = pixel[:3] # ignore the alpha
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for color in pixel:
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buff += (color & 1) << (tools.ENCODINGS[encoding] - 1 - count)
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@ -114,7 +118,7 @@ def reveal(input_image: Union[str, IO[bytes]], encoding='UTF-8'):
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if count == tools.ENCODINGS[encoding]:
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bitab.append(chr(buff))
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buff, count = 0, 0
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if bitab[-1] == ":" and limit == None:
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if bitab[-1] == ":" and limit is None:
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try:
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limit = int("".join(bitab[:-1]))
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except:
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@ -25,9 +25,10 @@ __date__ = "$Date: 2011/12/28 $"
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__revision__ = "$Date: 2017/03/10 $"
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__license__ = "GPLv3"
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import math
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import itertools
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from typing import Iterator, List, Dict
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import math
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from typing import Dict, Iterator, List
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def identity() -> Iterator[int]:
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"""f(x) = x
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@ -37,6 +38,7 @@ def identity() -> Iterator[int]:
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yield n
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n += 1
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def triangular_numbers() -> Iterator[int]:
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"""Triangular numbers: a(n) = C(n+1,2) = n(n+1)/2 = 0+1+2+...+n.
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http://oeis.org/A000217
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@ -46,6 +48,7 @@ def triangular_numbers() -> Iterator[int]:
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yield (n * (n + 1)) // 2
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n += 1
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def fermat() -> Iterator[int]:
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"""Generate the n-th Fermat Number.
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https://oeis.org/A000215
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@ -55,6 +58,7 @@ def fermat() -> Iterator[int]:
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yield y
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y = pow(y - 1, 2) + 1
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def mersenne() -> Iterator[int]:
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"""Generate 2^p - 1, where p is prime.
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https://oeis.org/A001348
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@ -63,6 +67,7 @@ def mersenne() -> Iterator[int]:
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while True:
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yield 2 ** next(prime_numbers) - 1
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def eratosthenes() -> Iterator[int]:
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"""Generate the prime numbers with the sieve of Eratosthenes.
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https://oeis.org/A000040
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@ -77,6 +82,7 @@ def eratosthenes() -> Iterator[int]:
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d[i * i] = [i]
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yield i
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def composite() -> Iterator[int]:
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"""Generate the composite numbers using the sieve of Eratosthenes.
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https://oeis.org/A002808
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@ -87,6 +93,7 @@ def composite() -> Iterator[int]:
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yield n
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p1 = p2
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def carmichael() -> Iterator[int]:
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"""Composite numbers n such that a^(n-1) == 1 (mod n) for every a coprime
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to n.
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@ -99,6 +106,7 @@ def carmichael() -> Iterator[int]:
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else:
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yield m
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def ackermann_naive(m: int, n: int) -> int:
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"""Ackermann number.
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"""
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@ -109,6 +117,7 @@ def ackermann_naive(m: int, n: int) -> int:
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else:
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return ackermann(m - 1, ackermann(m, n - 1))
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def ackermann(m: int, n: int) -> int:
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"""Ackermann number.
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"""
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@ -127,6 +136,7 @@ def ackermann(m: int, n: int) -> int:
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else:
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return n + 1
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def fibonacci() -> Iterator[int]:
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"""Generate the sequence of Fibonacci.
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https://oeis.org/A000045
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@ -136,6 +146,7 @@ def fibonacci() -> Iterator[int]:
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yield a
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a, b = b, a + b
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def log_gen() -> Iterator[int]:
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"""Logarithmic generator.
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"""
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@ -25,36 +25,38 @@ __date__ = "$Date: 2016/03/13 $"
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__revision__ = "$Date: 2018/12/18 $"
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__license__ = "GPLv3"
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import sys
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from typing import IO, Iterator, Union
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from PIL import Image
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from typing import Union, Iterator, IO
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from stegano import tools
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from . import generators
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def hide(input_image: Union[str, IO[bytes]],
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def hide(
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input_image: Union[str, IO[bytes]],
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message: str,
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generator: Iterator[int],
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shift: int = 0,
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encoding: str = 'UTF-8',
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auto_convert_rgb: bool = False):
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encoding: str = "UTF-8",
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auto_convert_rgb: bool = False,
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):
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"""Hide a message (string) in an image with the
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LSB (Least Significant Bit) technique.
|
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"""
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message_length = len(message)
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assert message_length != 0, "message length is zero"
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img = Image.open(input_image)
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img = tools.open_image(input_image)
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if img.mode not in ['RGB', 'RGBA']:
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if img.mode not in ["RGB", "RGBA"]:
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if not auto_convert_rgb:
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print('The mode of the image is not RGB. Mode is {}'.\
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format(img.mode))
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answer = input('Convert the image to RGB ? [Y / n]\n') or 'Y'
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if answer.lower() == 'n':
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raise Exception('Not a RGB image.')
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img = img.convert('RGB')
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print(
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"The mode of the image is not RGB. Mode is {}".format(img.mode)
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)
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answer = input("Convert the image to RGB ? [Y / n]\n") or "Y"
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if answer.lower() == "n":
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raise Exception("Not a RGB image.")
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img = img.convert("RGB")
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img_list = list(img.getdata())
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width, height = img.size
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|
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@ -62,13 +64,16 @@ def hide(input_image: Union[str, IO[bytes]],
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message = str(message_length) + ":" + str(message)
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message_bits = "".join(tools.a2bits_list(message, encoding))
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message_bits += '0' * ((3 - (len(message_bits) % 3)) % 3)
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message_bits += "0" * ((3 - (len(message_bits) % 3)) % 3)
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npixels = width * height
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len_message_bits = len(message_bits)
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if len_message_bits > npixels * 3:
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raise Exception("The message you want to hide is too long: {}". \
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format(message_length))
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raise Exception(
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"The message you want to hide is too long: {}".format(
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message_length
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)
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)
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while shift != 0:
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next(generator)
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shift -= 1
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@ -83,7 +88,7 @@ def hide(input_image: Union[str, IO[bytes]],
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b = tools.setlsb(b, message_bits[index + 2])
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# Save the new pixel
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if img.mode == 'RGBA':
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if img.mode == "RGBA":
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img_list[generated_number] = (r, g, b, a[0])
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else:
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img_list[generated_number] = (r, g, b)
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|
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@ -91,7 +96,7 @@ def hide(input_image: Union[str, IO[bytes]],
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index += 3
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# create empty new image of appropriate format
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encoded = Image.new('RGB', (img.size))
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encoded = Image.new("RGB", (img.size))
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|
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# insert saved data into the image
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encoded.putdata(img_list)
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|
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@ -99,13 +104,15 @@ def hide(input_image: Union[str, IO[bytes]],
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return encoded
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def reveal(input_image: Union[str, IO[bytes]],
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def reveal(
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input_image: Union[str, IO[bytes]],
|
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generator: Iterator[int],
|
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shift: int = 0,
|
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encoding: str = 'UTF-8'):
|
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encoding: str = "UTF-8",
|
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):
|
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"""Find a message in an image (with the LSB technique).
|
||||
"""
|
||||
img = Image.open(input_image)
|
||||
img = tools.open_image(input_image)
|
||||
img_list = list(img.getdata())
|
||||
width, height = img.size
|
||||
buff, count = 0, 0
|
||||
|
|
|
|||
|
|
@ -25,10 +25,10 @@ __date__ = "$Date: 2010/10/01 $"
|
|||
__revision__ = "$Date: 2017/02/06 $"
|
||||
__license__ = "GPLv3"
|
||||
|
||||
import sys
|
||||
from typing import IO, Union
|
||||
|
||||
from stegano import tools
|
||||
|
||||
from PIL import Image
|
||||
from typing import Union, IO
|
||||
|
||||
def hide(input_image: Union[str, IO[bytes]], message: str):
|
||||
"""
|
||||
|
|
@ -41,7 +41,7 @@ def hide(input_image: Union[str, IO[bytes]], message: str):
|
|||
message_length = len(message)
|
||||
assert message_length != 0, "message message_length is zero"
|
||||
assert message_length < 255, "message is too long"
|
||||
img = Image.open(input_image)
|
||||
img = tools.open_image(input_image)
|
||||
# Use a copy of image to hide the text in
|
||||
encoded = img.copy()
|
||||
width, height = img.size
|
||||
|
|
@ -62,6 +62,7 @@ def hide(input_image: Union[str, IO[bytes]], message: str):
|
|||
img.close()
|
||||
return encoded
|
||||
|
||||
|
||||
def reveal(input_image: Union[str, IO[bytes]]):
|
||||
"""
|
||||
Find a message in an image.
|
||||
|
|
@ -70,7 +71,7 @@ def reveal(input_image: Union[str, IO[bytes]]):
|
|||
hidden message characters (ASCII values).
|
||||
The red value of the first pixel is used for message_length of string.
|
||||
"""
|
||||
img = Image.open(input_image)
|
||||
img = tools.open_image(input_image)
|
||||
width, height = img.size
|
||||
message = ""
|
||||
index = 0
|
||||
|
|
|
|||
|
|
@ -27,13 +27,13 @@ __license__ = "GPLv3"
|
|||
|
||||
import base64
|
||||
import itertools
|
||||
from typing import List, Iterator, Tuple, Union
|
||||
from functools import reduce
|
||||
from typing import IO, Iterator, List, Tuple, Union
|
||||
|
||||
from PIL import Image
|
||||
|
||||
ENCODINGS = {"UTF-8": 8, "UTF-32LE": 32}
|
||||
|
||||
ENCODINGS = {
|
||||
'UTF-8': 8,
|
||||
'UTF-32LE': 32
|
||||
}
|
||||
|
||||
def a2bits(chars: str) -> str:
|
||||
"""Converts a string to its bits representation as a string of 0's and 1's.
|
||||
|
|
@ -41,9 +41,12 @@ def a2bits(chars: str) -> str:
|
|||
>>> a2bits("Hello World!")
|
||||
'010010000110010101101100011011000110111100100000010101110110111101110010011011000110010000100001'
|
||||
"""
|
||||
return bin(reduce(lambda x, y : (x<<8)+y, (ord(c) for c in chars), 1))[3:]
|
||||
return bin(reduce(lambda x, y: (x << 8) + y, (ord(c) for c in chars), 1))[
|
||||
3:
|
||||
]
|
||||
|
||||
def a2bits_list(chars: str, encoding: str ='UTF-8') -> List[str]:
|
||||
|
||||
def a2bits_list(chars: str, encoding: str = "UTF-8") -> List[str]:
|
||||
"""Convert a string to its bits representation as a list of 0's and 1's.
|
||||
|
||||
>>> a2bits_list("Hello World!")
|
||||
|
|
@ -64,18 +67,22 @@ def a2bits_list(chars: str, encoding: str ='UTF-8') -> List[str]:
|
|||
"""
|
||||
return [bin(ord(x))[2:].rjust(ENCODINGS[encoding], "0") for x in chars]
|
||||
|
||||
|
||||
def bs(s: int) -> str:
|
||||
"""Converts an int to its bits representation as a string of 0's and 1's.
|
||||
"""
|
||||
return str(s) if s <= 1 else bs(s >> 1) + str(s & 1)
|
||||
|
||||
|
||||
def setlsb(component: int, bit: str) -> int:
|
||||
"""Set Least Significant Bit of a colour component.
|
||||
"""
|
||||
return component & ~1 | int(bit)
|
||||
|
||||
def n_at_a_time(items: List[int], n: int, fillvalue: str) \
|
||||
-> Iterator[Tuple[Union[int, str]]]:
|
||||
|
||||
def n_at_a_time(
|
||||
items: List[int], n: int, fillvalue: str
|
||||
) -> Iterator[Tuple[Union[int, str]]]:
|
||||
"""Returns an iterator which groups n items at a time.
|
||||
Any final partial tuple will be padded with the fillvalue
|
||||
|
||||
|
|
@ -85,6 +92,7 @@ def n_at_a_time(items: List[int], n: int, fillvalue: str) \
|
|||
it = iter(items)
|
||||
return itertools.zip_longest(*[it] * n, fillvalue=fillvalue)
|
||||
|
||||
|
||||
def binary2base64(binary_file: str) -> str:
|
||||
"""Convert a binary file (OGG, executable, etc.) to a
|
||||
printable string.
|
||||
|
|
@ -94,8 +102,21 @@ def binary2base64(binary_file: str) -> str:
|
|||
encoded_string = base64.b64encode(bin_file.read())
|
||||
return encoded_string.decode()
|
||||
|
||||
|
||||
def base642binary(b64_fname: str) -> bytes:
|
||||
"""Convert a printable string to a binary file.
|
||||
"""
|
||||
b64_fname += '==='
|
||||
b64_fname += "==="
|
||||
return base64.b64decode(b64_fname)
|
||||
|
||||
|
||||
def open_image(fname_or_instance: Union[str, IO[bytes]]):
|
||||
"""Opens a Image and returns it.
|
||||
|
||||
:param fname_or_instance: Can either be the location of the image as a
|
||||
string or the Image.Image instance itself.
|
||||
"""
|
||||
if isinstance(fname_or_instance, Image.Image):
|
||||
return fname_or_instance
|
||||
|
||||
return Image.open(fname_or_instance)
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue