Bagaimana untuk Menambah dan Mengeluarkan Padding PKCS7 daripada Rentetan Disulitkan AES?

import base64
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad

# Sample data to encrypt
data = "Hello, World!"

# Define the AES key (128 bits = 16 bytes)
key = 'YOUR_AES_KEY_16_BYTES_LONG'

# Initialization vector (IV) for ECB mode is not used and ignored
iv = '0' * 16

# Create an AES cipher in ECB mode
cipher = AES.new(key, AES.MODE_ECB)

# Pad the data before encryption
padded_data = pad(data, 16)  # 16 is the block size for AES-128

# Encrypt the padded data
ciphertext = cipher.encrypt(padded_data)

# Encode the ciphertext in base64 for transmission
ciphertext_base64 = base64.b64encode(ciphertext).decode('utf-8')

# Print the encrypted and base64-encoded ciphertext
print(ciphertext_base64)

import base64
from Crypto.Cipher import AES
from Crypto.Util.Padding import unpad

# Sample base64-encoded ciphertext to decrypt
ciphertext_base64 = 'ENCRYPTED_AND_BASE64_ENCODED_DATA'

# Decode the base64 ciphertext
ciphertext = base64.b64decode(ciphertext_base64)

# Define the AES key (128 bits = 16 bytes)
key = 'YOUR_AES_KEY_16_BYTES_LONG'

# Initialization vector (IV) for ECB mode is not used and ignored
iv = '0' * 16

# Create an AES cipher in ECB mode
cipher = AES.new(key, AES.MODE_ECB)

# Decrypt the ciphertext
decrypted = cipher.decrypt(ciphertext)

# Remove the padding from the decrypted data
data = unpad(decrypted, 16)

# Print the decrypted and unpadded data
print(data.decode('utf-8'))