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Introduce a new argument in a2bits_list in order to specify the encoding of the string (unicode)

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Cédric Bonhomme 2017-05-04 13:05:56 +02:00
parent 49964d4f16
commit 5f5c07493c
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6 changed files with 77 additions and 28 deletions
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14
stegano/lsbset/lsbset.py
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@ -32,7 +32,11 @@ from PIL import Image
from stegano import tools
from . import generators
def hide(input_image_file, message, generator, auto_convert_rgb=False):
def hide(input_image_file,
message,
generator,
encoding='UTF-8',
auto_convert_rgb=False):
"""Hide a message (string) in an image with the
LSB (Least Significant Bit) technique.
"""
@ -55,7 +59,7 @@ def hide(input_image_file, message, generator, auto_convert_rgb=False):
index = 0
message = str(message_length) + ":" + str(message)
message_bits = "".join(tools.a2bits_list(message))
message_bits = "".join(tools.a2bits_list(message, encoding))
message_bits += '0' * ((3 - (len(message_bits) % 3)) % 3)
npixels = width * height
@ -90,7 +94,7 @@ def hide(input_image_file, message, generator, auto_convert_rgb=False):
return encoded
def reveal(input_image_file, generator):
def reveal(input_image_file, generator, encoding='UTF-8'):
"""Find a message in an image (with the LSB technique).
"""
img = Image.open(input_image_file)
@ -104,9 +108,9 @@ def reveal(input_image_file, generator):
generated_number = next(generator)
# color = [r, g, b]
for color in img_list[generated_number]:
buff += (color&1)<<(31-count)
buff += (color&1)<<(tools.ENCODINGS[encoding]-1 - count)
count += 1
if count == 32:
if count == tools.ENCODINGS[encoding]:
bitab.append(chr(buff))
buff, count = 0, 0
if bitab[-1] == ":" and limit == None: