from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend
from binascii import hexlify as hexa
from os import urandom
 
k=urandom(16)
iv=urandom(16)
print("k=",hexa(k))
cipher = Cipher(algorithms.AES(k), modes.CBC(iv), backend = default_backend)
aes_encrypt = cipher.encryptor()
p1=urandom(16)
p2=urandom(16)
p=p1+p2+p1
c=aes_encrypt.update(p) +aes_encrypt.finalize()
print("p= ",hexa(p))
print("c=",hexa(c))
aes_decrypt = cipher.decryptor()
p3=aes_decrypt.update(c) +aes_decrypt.finalize()
print("p3=",hexa(p3))

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