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aes-file-encryption2.0v.py
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import tkinter as tk
from tkinter import ttk, messagebox, filedialog
import os
from tkinter import filedialog
from tkinterdnd2 import DND_FILES, TkinterDnD
def pad(plaintext):
"""Pad the plaintext to make it 16 bytes long."""
padding_length = 16 - (len(plaintext) % 16)
return plaintext + bytes([padding_length] * padding_length)
def unpad(plaintext):
"""Remove the padding from the plaintext."""
padding_length = plaintext[-1]
return plaintext[:-padding_length]
#S-box
sbox = [
0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
]
# Inverse S-box
inv_sbox = [
0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB,
0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB,
0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,
0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25,
0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92,
0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,
0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06,
0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,
0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,
0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E,
0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B,
0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,
0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,
0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF,
0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,
0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D
]
# Rcon (Round Constant) table
Rcon = [
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
]
def sub_bytes(state):
for i in range(4):
for j in range(4):
state[i][j] = sbox[state[i][j]]
return state
def inv_sub_bytes(state):
for i in range(4):
for j in range(4):
state[i][j] = inv_sbox[state[i][j]]
return state
def shift_rows(state):
state[1] = state[1][1:] + state[1][:1]
state[2] = state[2][2:] + state[2][:2]
state[3] = state[3][3:] + state[3][:3]
return state
def inv_shift_rows(state):
state[1] = state[1][3:] + state[1][:3]
state[2] = state[2][2:] + state[2][:2]
state[3] = state[3][1:] + state[3][:1]
return state
def mix_columns(state):
for i in range(4):
col = [state[j][i] for j in range(4)]
col = [col[0] ^ col[1] ^ col[2], col[1] ^ col[2] ^ col[3],
col[2] ^ col[3] ^ col[0], col[3] ^ col[0] ^ col[1]]
for j in range(4):
state[j][i] = col[j]
return state
def inv_mix_columns(state):
return mix_columns(mix_columns(mix_columns(state)))
def add_round_key(state, round_key):
for i in range(4):
for j in range(4):
state[i][j] ^= round_key[i][j]
return state
def key_expansion(key):
key_words = [key[i:i+4] for i in range(0, len(key), 4)]
for i in range(4, 44):
temp = key_words[i-1]
if i % 4 == 0:
temp = [sbox[b] for b in temp[1:] + temp[:1]]
temp[0] ^= Rcon[i//4]
key_words.append([a ^ b for a, b in zip(key_words[i-4], temp)])
return [word for words in key_words for word in words]
class AES:
def __init__(self, key):
self.round_keys = key_expansion(key)
def encrypt(self, plaintext):
state = [[plaintext[i+j*4] for j in range(4)] for i in range(4)]
state = add_round_key(state, [self.round_keys[i:i+4] for i in range(0, 16, 4)])
for round in range(1, 10):
state = sub_bytes(state)
state = shift_rows(state)
state = mix_columns(state)
state = add_round_key(state, [self.round_keys[round*16+i:round*16+i+4] for i in range(0, 16, 4)])
state = sub_bytes(state)
state = shift_rows(state)
state = add_round_key(state, [self.round_keys[160+i:160+i+4] for i in range(0, 16, 4)])
return bytes(state[i][j] for j in range(4) for i in range(4))
def decrypt(self, ciphertext):
state = [[ciphertext[i+j*4] for j in range(4)] for i in range(4)]
state = add_round_key(state, [self.round_keys[160+i:160+i+4] for i in range(0, 16, 4)])
for round in range(9, 0, -1):
state = inv_shift_rows(state)
state = inv_sub_bytes(state)
state = add_round_key(state, [self.round_keys[round*16+i:round*16+i+4] for i in range(0, 16, 4)])
state = inv_mix_columns(state)
state = inv_shift_rows(state)
state = inv_sub_bytes(state)
state = add_round_key(state, [self.round_keys[i:i+4] for i in range(0, 16, 4)])
return bytes(state[i][j] for j in range(4) for i in range(4))
@staticmethod
def generate_random_key():
return os.urandom(16)
class AESApp(TkinterDnD.Tk):
def __init__(self):
super().__init__()
self.title("AES Encryption/Decryption")
self.geometry("700x600")
self.configure(bg="#2b2b2b")
self.style = ttk.Style(self)
self.style.theme_create("darktheme", parent="alt", settings={
"TNotebook": {"configure": {"background": "#2b2b2b", "tabmargins": [2, 5, 2, 0]}},
"TNotebook.Tab": {
"configure": {"padding": [10, 5], "background": "#3c3f41"},
"map": {"background": [("selected", "#4eb25b")],
"expand": [("selected", [1, 1, 1, 0])]},
},
"TFrame": {"configure": {"background": "#2b2b2b"}},
"TButton": {"configure": {"padding": [10, 5], "background": "#4eb25b", "foreground": "white", "borderwidth": "1.2rem"}},
"TLabel": {"configure": {"background": "#2b2b2b", "foreground": "white"}},
"TEntry": {"configure": {"insertbackground": "white"}},
})
self.style.theme_use("darktheme")
notebook = ttk.Notebook(self)
notebook.pack(pady=20, padx=20, expand=True, fill="both")
encryption_tab = ttk.Frame(notebook)
decryption_tab = ttk.Frame(notebook)
notebook.add(encryption_tab, text="Encryption")
notebook.add(decryption_tab, text="Decryption")
# Encryption Tab
self.create_encryption_tab(encryption_tab)
# Decryption Tab
self.create_decryption_tab(decryption_tab)
def create_encryption_tab(self, parent):
frame = ttk.Frame(parent)
frame.pack(padx=20, pady=20, fill="both", expand=True)
ttk.Label(frame, text="Select file to encrypt:").grid(row=0, column=0, padx=10, pady=10, sticky="w")
self.encryption_file_path = tk.StringVar()
entry = ttk.Entry(frame, textvariable=self.encryption_file_path, width=40)
entry.grid(row=0, column=1, padx=10, pady=10, sticky="ew")
ttk.Button(frame, text="Browse", command=self.browse_encryption_file).grid(row=0, column=2, padx=10, pady=10)
ttk.Label(frame, text="Key").grid(row=1, column=0, padx=10, pady=10, sticky="w")
self.key_entry = ttk.Entry(frame, width=40)
self.key_entry.grid(row=1, column=1, padx=10, pady=10, sticky="ew")
generate_key_button = ttk.Button(frame, text="Generate Key", command=self.generate_key)
generate_key_button.grid(row=2, column=1, padx=10, pady=10)
encrypt_button = ttk.Button(frame, text="Encrypt", command=self.encrypt_file)
encrypt_button.grid(row=3, column=1, padx=10, pady=10)
# Drop zone
drop_frame = ttk.Frame(frame, relief="groove", borderwidth=2)
drop_frame.grid(row=4, column=0, columnspan=3, padx=10, pady=20, sticky="nsew")
drop_label = ttk.Label(drop_frame, text="Drag and drop file here to encrypt automatically")
drop_label.pack(expand=True, fill="both", padx=20, pady=20)
drop_frame.drop_target_register(DND_FILES)
drop_frame.dnd_bind('<<Drop>>', self.drop_file_encrypt)
frame.columnconfigure(1, weight=1)
frame.rowconfigure(4, weight=1)
def create_decryption_tab(self, parent):
frame = ttk.Frame(parent)
frame.pack(padx=20, pady=20, fill="both", expand=True)
ttk.Label(frame, text="Select file to decrypt:").grid(row=0, column=0, padx=10, pady=10, sticky="w")
self.decryption_file_path = tk.StringVar()
entry = ttk.Entry(frame, textvariable=self.decryption_file_path, width=40)
entry.grid(row=0, column=1, padx=10, pady=10, sticky="ew")
ttk.Button(frame, text="Browse", command=self.browse_decryption_file).grid(row=0, column=2, padx=10, pady=10)
ttk.Label(frame, text="Key").grid(row=1, column=0, padx=10, pady=10, sticky="w")
self.decryption_key_entry = ttk.Entry(frame, width=40)
self.decryption_key_entry.grid(row=1, column=1, padx=10, pady=10, sticky="ew")
decrypt_button = ttk.Button(frame, text="Decrypt", command=self.decrypt_file)
decrypt_button.grid(row=2, column=1, padx=10, pady=10)
# Drop zone
drop_frame = ttk.Frame(frame, relief="groove", borderwidth=2)
drop_frame.grid(row=3, column=0, columnspan=3, padx=10, pady=20, sticky="nsew")
drop_label = ttk.Label(drop_frame, text="Drag and drop file here to decrypt")
drop_label.pack(expand=True, fill="both", padx=20, pady=20)
drop_frame.drop_target_register(DND_FILES)
drop_frame.dnd_bind('<<Drop>>', self.drop_file_decrypt)
frame.columnconfigure(1, weight=1)
frame.rowconfigure(3, weight=1)
def drop_file_encrypt(self, event):
file_path = event.data
if file_path.startswith("{") and file_path.endswith("}"):
file_path = file_path[1:-1]
self.encryption_file_path.set(file_path)
self.generate_key()
self.encrypt_file(auto=True)
def drop_file_decrypt(self, event):
file_path = event.data
if file_path.startswith("{") and file_path.endswith("}"):
file_path = file_path[1:-1]
self.decryption_file_path.set(file_path)
def generate_key(self):
key = AES.generate_random_key()
self.key_entry.delete(0, tk.END)
self.key_entry.insert(0, key.hex())
def browse_encryption_file(self):
filename = filedialog.askopenfilename()
if filename:
self.encryption_file_path.set(filename)
def browse_decryption_file(self):
filename = filedialog.askopenfilename()
if filename:
self.decryption_file_path.set(filename)
def encrypt_file(self, auto=False):
input_file = self.encryption_file_path.get()
key_hex = self.key_entry.get().strip()
if not input_file:
messagebox.showerror("Error", "Please select an input file.")
return
if not key_hex:
if not auto:
messagebox.showerror("Error", "Please enter a key or generate one.")
return
else:
self.generate_key()
key_hex = self.key_entry.get().strip()
try:
key = bytes.fromhex(key_hex)
if len(key) != 16:
messagebox.showerror("Error", "Key must be 16 bytes (32 hex characters).")
return
except ValueError:
messagebox.showerror("Error", "Invalid key format. Please enter a valid hex string.")
return
# Generate output filename
base_name = os.path.basename(input_file)
name, ext = os.path.splitext(base_name)
output_file = os.path.join(os.path.dirname(input_file), f"{name}_encrypted{ext}.enc")
aes = AES(key)
try:
with open(input_file, 'rb') as f_in, open(output_file, 'wb') as f_out:
# Save the original file extension
_, file_extension = os.path.splitext(input_file)
f_out.write(len(file_extension).to_bytes(1, byteorder='big'))
f_out.write(file_extension.encode())
plaintext = f_in.read()
padded_plaintext = pad(plaintext)
for i in range(0, len(padded_plaintext), 16):
chunk = padded_plaintext[i:i+16]
encrypted_chunk = aes.encrypt(chunk)
f_out.write(encrypted_chunk)
messagebox.showinfo("Success", f"File encrypted and saved as {output_file}")
except Exception as e:
messagebox.showerror("Error", f"Encryption failed: {str(e)}")
def decrypt_file(self):
input_file = self.decryption_file_path.get()
key_hex = self.decryption_key_entry.get().strip()
if not input_file:
messagebox.showerror("Error", "Please select an input file.")
return
if not key_hex:
messagebox.showerror("Error", "Please enter a key.")
return
try:
key = bytes.fromhex(key_hex)
if len(key) != 16:
messagebox.showerror("Error", "Key must be 16 bytes (32 hex characters).")
return
except ValueError:
messagebox.showerror("Error", "Invalid key format. Please enter a valid hex string.")
return
aes = AES(key)
try:
with open(input_file, 'rb') as f_in:
# Read the original file extension
extension_length = int.from_bytes(f_in.read(1), byteorder='big')
original_extension = f_in.read(extension_length).decode()
ciphertext = f_in.read()
decrypted_data = b''
for i in range(0, len(ciphertext), 16):
chunk = ciphertext[i:i+16]
decrypted_chunk = aes.decrypt(chunk)
decrypted_data += decrypted_chunk
unpadded_data = unpad(decrypted_data)
# Use the original file extension for the output file
output_file = filedialog.asksaveasfilename(defaultextension=original_extension)
if not output_file:
return
with open(output_file, 'wb') as f_out:
f_out.write(unpadded_data)
messagebox.showinfo("Success", f"File decrypted and saved as {output_file}")
except Exception as e:
messagebox.showerror("Error", f"Decryption failed: {str(e)}")
if __name__ == "__main__":
app = AESApp()
app.mainloop()