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from Crypto.PublicKey import RSA | |
from Crypto.Cipher import AES, PKCS1_OAEP | |
file_in = open("encrypted_data.bin", "rb") | |
private_key = RSA.import_key(open("private.pem").read()) | |
enc_session_key, nonce, tag, ciphertext = \ | |
[ file_in.read(x) for x in (private_key.size_in_bytes(), 16, 16, -1) ] | |
# Decrypt the session key with the private RSA key | |
cipher_rsa = PKCS1_OAEP.new(private_key) | |
session_key = cipher_rsa.decrypt(enc_session_key) | |
# Decrypt the data with the AES session key | |
cipher_aes = AES.new(session_key, AES.MODE_EAX, nonce) | |
data = cipher_aes.decrypt_and_verify(ciphertext, tag) | |
print(data.decode("utf-8")) | |