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GUI.py
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GUI.py
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from tkinter import *
from tkinter.filedialog import askopenfilename
from PIL import Image, ImageTk
from Encryption import Encryption
from Decryption import Decryption
import math
import os
class Application(Frame):
def __init__(self, master=None):
self.file_name = ''
Frame.__init__(self, master)
self.pack()
self.create_widgets()
def open_file(self):
self.file_name = askopenfilename(filetypes=[('BMP', '*.bmp')])
# change label text dynamically
self.name_label['text'] = 'Name: ' + self.file_name
# clear message in msg_box
if self.msg_box.get('1.0', END) != '':
self.msg_box.delete('1.0', END)
# clear image file
# img & photo must be global or image will not show
global left_img
left_img = None
global left_photo
left_photo = None
global right_img
right_img = None
global right_photo
right_photo = None
left_img = Image.open(self.file_name)
w, h = left_img.size
self.dimensions_label['text'] = 'Dimensions: ' + str(w) + 'x' + str(h)
self.size_label['text'] = 'Size: ' + str(os.path.getsize(self.file_name)) + 'Bytes'
# mode https://pillow.readthedocs.io/en/4.1.x/handbook/concepts.html#concept-modes
if left_img.mode == 'L':
self.mode_label['text'] = 'Mode: 8-Bit Pixels, Black and White'
self.available = int((w * h) / 8 - 4)
if self.available <= 0:
self.available_label['text'] = 'Available Size For Stega: 0 Bytes'
else:
self.available_label['text'] = 'Available Size For Stega: ' + str(self.available) + 'Bytes'
elif left_img.mode == 'RGB':
self.mode_label['text'] = 'Mode: 3x8-Bit Pixels, True Color'
self.available = int((w * h * 3) / 8 - 4)
if self.available <= 0:
self.available_label['text'] = 'Available Size For Stega: 0 Bytes'
else:
self.available_label['text'] = 'Available Size For Stega: ' + str(self.available) + 'Bytes'
else:
self.mode_label['text'] = 'Mode: ' + left_img.mode
# resize img
scale_w = img_display_width / w
scale_h = img_display_height / h
scale = min(scale_w, scale_h)
new_w = math.ceil(scale * w)
new_h = math.ceil(scale * h)
# Image.NEAREST http://pillow.readthedocs.io/en/4.1.x/releasenotes/2.7.0.html
left_img = left_img.resize((new_w, new_h), Image.NEAREST)
left_photo = ImageTk.PhotoImage(left_img)
self.left_img_canvas.create_image(img_display_width / 2, img_display_height / 2, anchor=CENTER,
image=left_photo)
def decry(self):
if self.file_name == '':
if self.msg_box.get('1.0', END) != '':
self.msg_box.delete('1.0', END)
self.msg_box.insert(END, 'Please open a bitmap file first.')
return 0
elif self.available < 1:
if self.msg_box.get('1.0', END) != '':
self.msg_box.delete('1.0', END)
self.msg_box.insert(END, 'This image is too short to hide message.')
return 0
else:
decryption = Decryption(self.file_name)
decry_msg = decryption.run()
if self.msg_box.get('1.0', END) != '':
self.msg_box.delete('1.0', END)
self.msg_box.insert(END, 'Hidden message: "' + decry_msg + '".')
def encry(self):
hide_msg = self.msg_box.get('1.0', END).replace('\n', '')
if self.file_name == '':
if hide_msg == '':
self.msg_box.delete('1.0', END)
self.msg_box.insert(END, 'Please open a bitmap file first.')
return 0
elif hide_msg == '':
self.msg_box.insert(END, 'Input hidden message here.')
return 0
elif len(hide_msg) > self.available:
if self.msg_box.get('1.0', END) != '':
self.msg_box.delete('1.0', END)
self.msg_box.insert(END, 'Input hidden message is larger than ' + str(self.available) + ' bytes.')
return 0
else:
origin_file_name = self.file_name
# add 'hidden' to new image file name
new_file_name = self.file_name[:-4] + '_hidden' + self.file_name[-4:]
encryption = Encryption(origin_file_name, new_file_name, hide_msg)
encryption.run()
global right_img
right_img = Image.open(self.file_name)
w, h = right_img.size
# resize img
scale_w = img_display_width / w
scale_h = img_display_height / h
scale = min(scale_w, scale_h)
new_w = math.ceil(scale * w)
new_h = math.ceil(scale * h)
img = right_img.resize((new_w, new_h), Image.NEAREST)
global right_photo
right_photo = ImageTk.PhotoImage(img)
self.right_img_canvas.create_image(img_display_width / 2, img_display_height / 2, anchor=CENTER,
image=right_photo)
if self.msg_box.get('1.0', END) != '':
self.msg_box.delete('1.0', END)
self.msg_box.insert(END, 'Saved new file into ' + new_file_name + '.')
def create_widgets(self):
# do not try to use grid and pack in the same window
# left part -----------------------------------------------------------
left_frame = Frame(self)
left_frame.pack(side=LEFT)
show_frame = Frame(left_frame)
show_frame.pack(side=TOP)
open_frame = Frame(show_frame)
open_frame.pack(side=TOP)
open_label = Label(open_frame, text='Open BMP File:')
open_label.pack(side=LEFT)
open_button = Button(open_frame, text='Open', command=self.open_file)
open_button.pack(side=LEFT)
self.name_label = Label(show_frame, text='Name: ')
self.name_label.pack(side=TOP)
self.dimensions_label = Label(show_frame, text='Dimensions: ')
self.dimensions_label.pack(side=TOP)
self.size_label = Label(show_frame, text='Size: ')
self.size_label.pack(side=TOP)
self.mode_label = Label(show_frame, text='Available Size For Stega: ')
self.mode_label.pack(side=TOP)
self.available_label = Label(show_frame, text='Mode: ')
self.available_label.pack(side=TOP)
self.left_img_canvas = Canvas(left_frame, bg='grey', width=img_display_width, height=img_display_height)
self.left_img_canvas.pack(side=BOTTOM)
# right part ------------------------------------------------------
right_frame = Frame(self)
right_frame.pack(side=RIGHT)
en_de_cry_frame = Frame(right_frame)
en_de_cry_frame.pack(side=TOP)
decry_button = Button(en_de_cry_frame, text='Decryption', command=self.decry)
decry_button.pack(side=LEFT)
encry_button = Button(en_de_cry_frame, text='Encryption', command=self.encry)
encry_button.pack(side=RIGHT)
msg_frame = Frame(right_frame)
msg_frame.pack(side=TOP)
self.msg_box = Text(msg_frame, width=42, height=7)
self.msg_box.pack(side=BOTTOM)
# right button part ---------------------------------------------------
self.right_img_canvas = Canvas(right_frame, bg='grey', width=img_display_width, height=img_display_height)
self.right_img_canvas.pack(side=BOTTOM)
left_img = None
left_photo = None
right_img = None
right_photo = None
img_display_width = 300
img_display_height = 200
app = Application()
app.master.title('LSB Steganography')
app.mainloop()