encrypt script

import os
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
from cryptography.hazmat.primitives import hashes

# Constants
ROUND_COUNT = 14  # For AES-256
KEY_SIZE = 32     # 32 bytes for AES-256
BLOCK_SIZE = 16   # AES block size in bytes

# Full AES S-Box
S_BOX = [
    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
]

# AES Rcon
RCON = [
    0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
    0x1B, 0x36, 0x6C, 0xD8, 0xAB, 0x4D, 0x9A
]

def generate_aes_key(password: bytes, salt: bytes = None, iterations: int = 1000000):
    if salt is None:
        salt = os.urandom(16)  # 16-byte salt
    kdf = PBKDF2HMAC(
        algorithm=hashes.SHA512(),
        length=KEY_SIZE,
        salt=salt,
        iterations=iterations,
    )
    key = kdf.derive(password)
    return key, salt

def sub_word(word):
    return [S_BOX[b] for b in word]

def rot_word(word):
    return word[1:] + word[:1]

def xor_words(word1, word2):
    return [a ^ b for a, b in zip(word1, word2)]

def key_expansion(key):
    key_symbols = [b for b in key]
    key_schedule = []
    n_k = KEY_SIZE // 4  # Number of 32-bit words in the key
    n_r = ROUND_COUNT    # Number of rounds

    # Initialize the first n_k words of the key schedule with the cipher key
    for i in range(n_k):
        key_schedule.append(key_symbols[4*i : 4*(i+1)])

    # Generate the rest of the key schedule
    for i in range(n_k, 4*(n_r+1)):
        temp = key_schedule[i - 1][:]
        if i % n_k == 0:
            temp = xor_words(sub_word(rot_word(temp)), [RCON[(i//n_k)-1], 0, 0, 0])
        elif n_k > 6 and i % n_k == 4:
            temp = sub_word(temp)
        key_schedule.append(xor_words(key_schedule[i - n_k], temp))

    # Convert key schedule into a list of round keys
    round_keys = [key_schedule[4*i : 4*(i+1)] for i in range(n_r+1)]
    return round_keys

def add_round_key(state, round_key):
    return [[state[row][col] ^ round_key[row][col] for col in range(4)] for row in range(4)]

def sub_bytes(state):
    return [[S_BOX[byte] for byte in row] for row in state]

def shift_rows(state):
    shifted_state = []
    for r in range(4):
        shifted_state.append(state[r][r:] + state[r][:r])
    return shifted_state

def mix_columns(state):
    def xtime(a):
        return (((a << 1) ^ 0x1B) & 0xFF) if (a & 0x80) else (a << 1)

    def mix_single_column(a):
        t = a[0] ^ a[1] ^ a[2] ^ a[3]
        u = a[0]
        a[0] ^= t ^ xtime(a[0] ^ a[1])
        a[1] ^= t ^ xtime(a[1] ^ a[2])
        a[2] ^= t ^ xtime(a[2] ^ a[3])
        a[3] ^= t ^ xtime(a[3] ^ u)
        return a

    state_columns = [list(col) for col in zip(*state)]
    for i in range(4):
        state_columns[i] = mix_single_column(state_columns[i])
    mixed_state = [list(row) for row in zip(*state_columns)]
    return mixed_state

def aes_encrypt_block(plaintext_block, round_keys):
    state = [list(plaintext_block[i:i+4]) for i in range(0, 16, 4)]

    # Initial Round
    state = add_round_key(state, round_keys[0])

    # Main Rounds
    for round_num in range(1, ROUND_COUNT):
        state = sub_bytes(state)
        state = shift_rows(state)
        state = mix_columns(state)
        state = add_round_key(state, round_keys[round_num])

    # Final Round
    state = sub_bytes(state)
    state = shift_rows(state)
    state = add_round_key(state, round_keys[ROUND_COUNT])

    # Flatten the state to get the ciphertext block
    ciphertext_block = [state[row][col] for col in range(4) for row in range(4)]
    return bytes(ciphertext_block)

def pad_data(data):
    padding_len = BLOCK_SIZE - (len(data) % BLOCK_SIZE)
    padding = bytes([padding_len] * padding_len)
    return data + padding

def generate_and_print_keys(password: bytes, iterations: int = 1000000):
    for i in range(1, 101):  # Generate 100 keys
        try:
            generated_key, used_salt = generate_aes_key(password, iterations=iterations)
            round_keys = key_expansion(generated_key)
            # For demonstration, the AES functions are implemented but not used here
            hex_key = generated_key.hex().upper()
            print(f"Key {i}:\nGenerated 256-bit key (hexadecimal):\n{hex_key}\n")
        except ValueError as ve:
            print(ve)
    input("Press Enter to exit...")

if __name__ == "__main__":
    user_password = input("Enter password: ").encode()
    generate_and_print_keys(user_password)