Using the AES$-$ECB encryptor from the cryptography.io module, implement the

AES mode in Figure $1.$ You can instantiate an AES$-$ECB encryptor as follows:

from cryptography.hazmat.primitives.ciphers import Cipher, algorithms,

modes

key $=$ # SELECT AN APPROPRIATE KEY FOR AES

cipher $=$ Cipher$($algorithms$.$AES$($key$),$ modes.ECB$())$

encryptor $=$ cipher.encryptor$()$

The function's name has to be CustomAESmode and defined as follows:

# $--$ START OF YOUR CODERUNNER SUBMISSION CODE

# INCLUDE ALL YOUR IMPORTS HERE

def CustomAESMode$($key: bytes, iv: bytes, plaintext: str$)->$ str:

# YOUR IMPLEMENTATION

return # THE CIPHERTEXT

# $--$ END OF YOUR CODERUNNER SUBMISSION CODE

#You can test your code in your system $($NOT IN YOUR CODERUNNER SUBMISSION$)$

as follows:

# MAIN

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

key $=$ bytes.fromhex$("06$a$9214036$b$8$a$15$b$512$e$03$d$534120006")$

iv $=$ bytes.fromhex$("3$dafba$429$d$9$eb$430$b$422$da$802$c$9$fac$41")$

txt $=$ "This is a text"

print$($ CustomAESMode$($key$,$ iv$,$ txt$))$

# The result using the above input should be:

$1827$bfc$04$f$1$a$455$eb$101$b$943$c$44$afc$1$d