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Added internal python-only AES-128-CBC implementation

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Mark Qvist 2022-06-09 21:13:24 +02:00
parent 701c624d0a
commit 68cd79768b
4 changed files with 436 additions and 13 deletions
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18
RNS/Cryptography/AES.py
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@ -23,8 +23,7 @@
import RNS.Cryptography.Provider as cp
if cp.PROVIDER == cp.PROVIDER_INTERNAL:
# TODO: Use internal AES
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from .aes import AES
elif cp.PROVIDER == cp.PROVIDER_PYCA:
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
@ -35,11 +34,8 @@ class AES_128_CBC:
@staticmethod
def encrypt(plaintext, key, iv):
if cp.PROVIDER == cp.PROVIDER_INTERNAL:
# TODO: Use internal AES
cipher = Cipher(algorithms.AES(key), modes.CBC(iv))
encryptor = cipher.encryptor()
ciphertext = encryptor.update(plaintext) + encryptor.finalize()
return ciphertext
cipher = AES(key)
return cipher.encrypt(plaintext, iv)
elif cp.PROVIDER == cp.PROVIDER_PYCA:
cipher = Cipher(algorithms.AES(key), modes.CBC(iv))
@ -50,15 +46,11 @@ class AES_128_CBC:
@staticmethod
def decrypt(ciphertext, key, iv):
if cp.PROVIDER == cp.PROVIDER_INTERNAL:
# TODO: Use internal AES
cipher = Cipher(algorithms.AES(key), modes.CBC(iv))
decryptor = cipher.decryptor()
plaintext = decryptor.update(ciphertext) + decryptor.finalize()
return plaintext
cipher = AES(key)
return cipher.decrypt(ciphertext, iv)
elif cp.PROVIDER == cp.PROVIDER_PYCA:
cipher = Cipher(algorithms.AES(key), modes.CBC(iv))
decryptor = cipher.decryptor()
plaintext = decryptor.update(ciphertext) + decryptor.finalize()
return plaintext