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decode.py
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decode.py
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# This script is used to decode and decrypt the message from the encoded video
'''
Install dependencies:
pip install -r requirements.txt
Usage:
python decode.py <path_to_encoded_video>
Example:
python decode.py video.avi
'''
from stegano import lsb
import cv2
import os
import sys
import aesutil
import shutil
from termcolor import cprint
from pyfiglet import figlet_format
import rsautil1
os.system('cls' if os.name == 'nt' else 'clear')
cprint(figlet_format('Team Byte', font='slant'),'yellow', attrs=['bold'])
cprint(figlet_format('AES & RSA encrypted Video Steganography Decoder', font='digital'),'green', attrs=['bold'])
ENCODED_VIDEO = sys.argv[1]
temp_folder = "tmp2"
frame_choice = int(input("1) Extract and enter frame numbers from image /n 2) Enter frame numbers manually : "))
decoded = {}
if frame_choice == 1:
ENCODED_IMAGE = input("/n Enter image name with extension : ")
res = lsb.reveal(ENCODED_IMAGE)
print(f"Encrypted frame numbers : {res}")
cprint("Select your encryption type \n 1) AES Encrypted {Symetric Encryption} \n 2) RSA Encrypted {Assysmetric Encryption}",'blue')
Encryption_Style=int(input(""))
if Encryption_Style == 1:
key = input("Enter the asymetric key to create AES key : ")
key_rsa = rsautil1.decrypt(message=key)
key_rsa = key_rsa.decode('utf-8')
print(f"Asymetric decrypted key \n {key_rsa}")
key123=int(input("Choose key type to decrypt image /n 1.HEX /n 2.ASCII : "))
key = input("Enter the key to decrypt image : ")
if key123==1:
msg = aesutil.decrypt(key=key,source=res)
msg1 = msg.decode('utf-8')
cprint(f"Decoded image : \n {msg}",'green')
FRAMES = list(map(int, input("Enter Above FRAME NUMBERS seperated by space: ").split()))
else:
msg = aesutil.decrypt(key=key,source=res,keyType='ascii')
msg1 = msg.decode('utf-8')
cprint(f"Decoded image: \n {msg1}",'green')
FRAMES = list(map(int, input("Enter Above FRAME NUMBERS seperated by space: ").split()))
else :
cprint("Reading private key from keys folder and trying to decrypt",'red')
msg1 = rsautil1.decrypt(message=res)
msg1 = msg1.decode('utf-8')
cprint(f"Decoded image: \n {msg1}",'green')
FRAMES = list(map(int, input("Enter Above FRAME NUMBERS seperated by space: ").split()))
else :
FRAMES = list(map(int, input("Enter FRAME NUMBERS seperated by space: ").split()))
cprint("Select your decryption type \n 1) AES Encrypted {Symetric Encryption} \n 2) RSA Encrypted {Assysmetric Encryption}",'blue')
Encryption_Style=int(input(""))
#print(FRAMES)
def createTmp():
if not os.path.exists(temp_folder):
os.makedirs(temp_folder)
def countFrames():
cap = cv2.VideoCapture(ENCODED_VIDEO)
length = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
return length
def decodeVideo(number_of_frames):
# First get the frame
cap = cv2.VideoCapture(ENCODED_VIDEO)
frame_number = -1
while(frame_number<=number_of_frames):
frame_number += 1
frame_file_name = os.path.join(temp_folder,f"{frame_number}.png")
encoded_frame_file_name = os.path.join(temp_folder,f"{frame_number}-enc.png")
# print(f"Frame number {frame_number}")
ret, frame = cap.read()
if frame_number in FRAMES:
cv2.imwrite(encoded_frame_file_name,frame)
clear_message = lsb.reveal(encoded_frame_file_name)
decoded[frame_number] = clear_message
cprint(f"Frame {frame_number} DECODED: {clear_message}",'blue')
def clean_tmp(path="./tmp2"):
if os.path.exists(path):
shutil.rmtree(path)
cprint("[INFO] tmp files are cleaned up",'green')
def arrangeAndDecrypt():
res=""
if Encryption_Style == 1:
for fn in FRAMES:
res = res + decoded[fn]
cprint(f"Final string: {res}",'green')
key123=int(input("Choose key type /n 1.HEX /n 2.ASCII : "))
key = input("Enter the key : ")
if key123==1:
msg = aesutil.decrypt(key=key,source=res)
msg1 = msg.decode('utf-8')
cprint(f"Decoded message: \n {msg}",'green')
clean_tmp()
else:
msg = aesutil.decrypt(key=key,source=res,keyType='ascii')
msg1 = msg.decode('utf-8')
cprint(f"Decoded message: \n {msg1}",'green')
clean_tmp()
else :
for fn in FRAMES:
res = res + decoded[fn]
cprint(f"Final string: {res}",'green')
cprint("Reading private key from keys folder and trying to decrypt",'red')
msg1 = rsautil1.decrypt(message=res)
msg1 = msg1.decode('utf-8')
cprint(f"Decoded text: \n {msg1}",'green')
clean_tmp()
createTmp()
frames = countFrames()
decodeVideo(frames)
arrangeAndDecrypt()