def create_cpt_parameter(password, size_x, size_y):
"""This functions gets parameter
password
size_x
size_y
and with them produces and returns a new cpt parameter
using libstegofile's types.h.
"""
para = libstegofile.cpt_parameter()
para.block_width = size_x
para.block_height = size_y
para.passwd = password
para.pwlen = len(password)
return para
def cptExtract(q):
post, filename = q.get()
rgb_data = libstegofile.rgb_data_t()
png_struct = libstegofile.png_internal_data_t()
retcode = libstegofile.io_png_read(filename, rgb_data, png_struct)
if retcode == 0:
pass
else:
return -1
para = libstegofile.cpt_parameter()
para.password = str(post["pw"])
para.pwlen = len(para.password)
para.block_width = int((post["width"]))
para.block_height = int((post["height"]))
stegomsg = libstego.new_charp()
stegolen = libstego.new_intp()
libstego.cpt_extract(rgb_data, stegomsg, stegolen, para)
q.put(str(libstego.charp_value(stegomsg)))
def cptEmbed(q):
post, filename = q.get()
rgb_data = libstegofile.rgb_data_t()
stego_data = libstegofile.rgb_data_t()
png_struct = libstegofile.png_internal_data_t()
retcode = libstegofile.io_png_read(filename, rgb_data, png_struct)
if retcode == 0:
pass
else:
q.put(-1)
return -1
para = libstegofile.cpt_parameter()
message = str(post["message"])
para.password = str(post["pw"])
para.pwlen = len(para.password)
para.block_width = int(post["width"])
para.block_height = int(post["height"])
retcode = libstego.cpt_embed(rgb_data, stego_data, message, len(message), para)
libstegofile.io_png_integrate(png_struct, stego_data)
libstegofile.io_png_write(filename, png_struct)
q.put(filename)
def setup_methods(password, filetype):
# Add all parameter sets for your algorithms here
# Order them from the most secure to the least secure
global num_methods
global method_to_algo
global methods
num_methods = 0
"""JPEG params"""
if filetype in ["JPEG", "JPG"]:
# PQ
#~ para = libstegofile.pq_parameter()
#~ para.header_size = 0
#~ para.quality = 0
#~ para.password = password
#~ para.pwlen = len(password)
#~ methods[num_methods] = para
#~ method_to_algo[num_methods] = "PQ"
#~ num_methods += 1
# F5
para = libstegofile.f5_parameter()
methods[num_methods] = para
method_to_algo[num_methods] = "F5"
num_methods += 1
"""GIF params"""
elif filetype == "GIF":
# Adv. Gifshuffle
para = libstegofile.gifshuffle_parameter()
para.method = 1
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "Adv. Gifshuffle"
num_methods += 1
# Gifshuffle
# TODO add Gifshuffle parameter set(s) here
# Frirui
para = libstegofile.frirui_parameter()
para.method = 0
para.size = 100
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "Frirui"
num_methods += 1
# Sort/Unsort
para = libstegofile.sortunsort_parameter()
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "Sort/Unsort"
num_methods += 1
"""PNG params"""
elif filetype == "PNG":
# CPT
for i in [8,6,4,2]:
para = libstegofile.cpt_parameter()
para.block_width = i;
para.block_height = i;
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "CPT"
num_methods += 1
# Battlesteg
para = libstegofile.battlesteg_parameter()
para.startbit = 7
para.move_away = 3
para.range = 5
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "Battlesteg"
num_methods += 1
"""SVG Params"""
elif filetype == "SVG":
# SVG Steg
for i in [6,4,2,0]:
para = libstegofile.svg_parameter_t()
para.password = password
para.pwlen = len(password)
para.first_embed_digit = i
methods[num_methods] = para
method_to_algo[num_methods] = "SVG Steg"
num_methods += 1
"""WAV Params"""
elif filetype == "WAV":
# Echo Hiding
para = libstegofile.eh_parameter()
para.amplitude = 0.4;
para.zero_offset = 900;
para.one_offset = 2700;
para.block_size = 80000;
methods[num_methods] = para
method_to_algo[num_methods] = "Echo Hiding"
num_methods += 1
# Phase Coding
# TODO: add Phase Coding parameter set(s) here
"""LSB"""
# LSB isn't dependant on a certain filetype
para = libstegofile.lsb_parameter_t()
para.password = password
para.pwlen = len(password)
para.select_mode = 2
para.use_msb = 0
methods[num_methods] = para
method_to_algo[num_methods] = "LSB"
num_methods += 1
def get_algorithm(filename, msglen, password):
if filename.endswith("jpeg") or filename.endswith("jpg"):
# PQ, F5, LSB
jpeg_data = libstegofile.jpeg_data_t()
jpeg_int = libstegofile.jpeg_internal_data_t()
err = libstegofile.io_jpeg_read(filename,jpeg_data, jpeg_int)
#TODO: ERROR (everywhere)
para = libstegofile.pq_parameter()
para.header_size = 0
para.quality = 0
if libstego.pq_check_capacity(jpeg_data, para) >= msglen:
libstegofile.jpeg_cleanup_data(jpeg_data)
libstegofile.io_jpeg_cleanup_internal(jpg_int)
return ["PQ",para]
para = libstegofile.f5_parameter()
if libstego.f5_check_capacity(jpeg_data, para) >= msglen:
libstegofile.jpeg_cleanup_data(jpeg_data)
libstegofile.io_jpeg_cleanup_internal(jpg_int)
return ["F5",para]
para = libstegofile.lsb_parameter()
# if libstego.lsb_check_capacity(jpeg_data, para) >= msglen:
# libstegofile.jpeg_cleanup_data(jpeg_data)
# libstegofile.io_jpeg_cleanup_internal(jpg_int)
# return ["LSB",para]
libstegofile.jpeg_cleanup_data(jpeg_data)
libstegofile.io_jpeg_cleanup_internal(jpg_int)
return
elif filename.endswith("gif"):
# AdvGifshuffle, Gifshuffle, Frirui, Sort/Unsort, LSB
palette_data = libstegofile.palette_data_t()
gif_int = libstegofile.gif_internal_data_t()
err = libstegofile.io_gif_read(filename, palette_data, gif_int)
para = libstegofile.gifshuffle_parameter()
if libstego.gifshuffle_check_capacity(palette_data, para) >= msglen:
return ["Adv. Gifshuffle", para]
# no elif gifshuffle since it has the same capacity that adv gusfhuffle has
para = libstegofile.frirui_parameter()
para.method = 0;
para.size = 100;
para.password = password
para.pwlen = len(password)
#para.method = 1;
#para.threshold = 574;
#para.password = password
#para.pwlen = len(password)
#para.method = 1;
#para.threshold = 1148;
#para.password = password
#para.pwlen = len(password)
#para.method = 2;
#para.password = password
#para.pwlen = len(password)
#para.method = 1;
#para.threshold = 2295;
#para.password = password
#para.pwlen = len(password)
#para.method = 0;
#para.size = 6;
#para.password = password
#para.pwlen = len(password)
# DONE: multiple parameter sets for frirui from Matthias here!
if libstego.frirui_check_capacity(palette_data, para) >= msglen:
return ["Frirui", para]
para = libstegofile.sortunsort_parameter()
if libstego.sortunsort_check_capacity(palette_data, para) >= msglen:
return ["Sort/Unsort", para]
"""para = libstegofile_lsb_parameter_t()
#TODO: LSB Wrappers for structs like palette_data -> Jan ?
if libstego.lsb_check_capacity(palette_data, para) >= msglen:
return ["LSB", para]"""
elif filename.endswith("png"):
# CPT, Battlesteg, LSB
rgb_data = libstegofile.rgb_data_t()
png_int = libstegofile.png_internal_data_t()
err = libstegofile.io_png_read(filename, rgb_data, png_int)
for i in [2,4,6,8]:
para = libstegofile.cpt_parameter()
para.block_width = i;
para.block_height = i;
para.password = password
para.pwlen = len(password)
if libstegofile.cpt_check_capacity(rgb_data, para) >= msglen:
return ["CPT", para]
para = libstegofile.battlesteg_parameter()
para.startbit = 7
para.move_away = 3
para.range = 5
para.password = password
para.pwlen = len(password)
# parameter set "capacity"
#para = libstegofile.battlesteg_parameter()
#para.startbit = 6
#para.move_away = 3
#para.range = 5
#para.password = "******"
#para.pwlen = 8
if libstegofile.battlesteg_check_capacity(rgb_data, para) >= msglen:
return ["BattleSteg", para]
"""para = libstegofile.lsb_parameter()
para.password = password
para.pwlen = len(password)
para.select_mode = 2
if libstegofile.lsb_check_capacity(rgb_data, para) >= msglen:
return ["LSB", para]"""
elif filename.endswith("wav"):
# Phase Coding, Echo Hiding, LSB
pass
elif filename.endswith("svg"):
# SVGSteg
svg_data = libstegofile.svg_data_t()
svg_int = libstegofile.svg_internal_data_t()
err = libstegofile.io_svg_read(filename, svg_data, svg_int)
if err != 0:
return None
para = libstegofile.svg_parameter_t()
para.password = password
para.pwlen = len(password)
para.first_embed_digit = 3
fits = False
if libstego.svg_check_capacity(svg_dat, para) >= msglen:
fits = True
libstegofile.svg_cleanup_data(svg_dat)
libstegofile.svg_cleanup_internal(svg_int)
if fits == True:
return ["SVG", para]
def setup_methods(password):
# Add all parameter sets for your algorithms here
# Order them from the most secure to the least secure
num_methods = 0
"""JPEG params"""
# PQ
para = libstegofile.pq_parameter()
para.header_size = 0
para.quality = 0
methods[num_methods] = para
method_to_algo[num_methods] = "PQ"
num_methods += 1
# F5
para = libstegofile.f5_parameter()
methods[num_methods] = para
method_to_algo[num_methods] = "F5"
num_methods += 1
"""GIF params"""
# Adv. Gifshuffle
para = libstegofile.gifshuffle_parameter()
methods[num_methods] = para
method_to_algo[num_methods] = "Adv. Gifshuffle"
num_methods += 1
# Gifshuffle
# TODO add Gifshuffle parameter set(s) here
# Frirui
para = libstegofile.frirui_parameter()
para.method = 0
para.size = 100
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "Frirui"
num_methods += 1
# Sort/Unsort
para = libstegofile.sortunsort_parameter()
methods[num_methods] = para
method_to_algo[num_methods] = "Sort/Unsort"
num_methods += 1
"""PNG params"""
# CPT
for i in [2,4,6,8]:
para = libstegofile.cpt_parameter()
para.block_width = i;
para.block_height = i;
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "CPT"
num_methods += 1
# Battlesteg
para = libstegofile.battlesteg_parameter()
para.startbit = 7
para.move_away = 3
para.range = 5
para.password = password
para.pwlen = len(password)
methods[num_methods] = para
method_to_algo[num_methods] = "Battlesteg"
num_methods += 1
"""SVG Params"""
# SVG Steg
for i in [6,4,2,0]:
para = libstegofile.svg_parameter_t()
para.password = password
para.pwlen = len(password)
para.first_embed_digit = i
methods[num_methods] = para
method_to_algo[num_methods] = "SVG Steg"
num_methods += 1
"""WAV Params"""
# Echo Hiding
# TODO: add Echo Hiding parameter set(s) here
# Phase Coding
# TODO: add Phase Coding parameter set(s) here
"""LSB"""
para = libstegofile.lsb_parameter_t()
para.password = password
para.pwlen = len(password)
para.select_mode = 2
para.use_msb = 0
methods[num_methods] = para
method_to_algo[num_methods] = "LSB"
num_methods += 1
