def test_gcm_decrypt():
""" Tests decryption with AES-GCM """
from Lab01Code import encrypt_message, decrypt_message
from os import urandom
K = urandom(16)
message = u"Hello World!"
iv, ciphertext, tag = encrypt_message(K, message)
assert len(iv) == 16
assert len(ciphertext) == len(message)
assert len(tag) == 16
m = decrypt_message(K, iv, ciphertext, tag)
assert m == message
def test_gcm_decrypt():
""" Tests decryption with AES-GCM """
from Lab01Code import encrypt_message, decrypt_message
from os import urandom
K = urandom(16)
message = u"Hello World!"
iv, ciphertext, tag = encrypt_message(K, message)
assert len(iv) == 16
assert len(ciphertext) == len(message)
assert len(tag) == 16
m = decrypt_message(K, iv, ciphertext, tag)
assert m == message
def test_gcm_fails():
from pytest import raises
from Lab01Code import encrypt_message, decrypt_message
from os import urandom
K = urandom(16)
message = u"Hello World!"
iv, ciphertext, tag = encrypt_message(K, message)
with raises(Exception) as excinfo:
decrypt_message(K, iv, urandom(len(ciphertext)), tag)
assert 'decryption failed' in str(excinfo.value)
with raises(Exception) as excinfo:
decrypt_message(K, iv, ciphertext, urandom(len(tag)))
assert 'decryption failed' in str(excinfo.value)
with raises(Exception) as excinfo:
decrypt_message(K, urandom(len(iv)), ciphertext, tag)
assert 'decryption failed' in str(excinfo.value)
with raises(Exception) as excinfo:
decrypt_message(urandom(len(K)), iv, ciphertext, tag)
assert 'decryption failed' in str(excinfo.value)
def test_gcm_fails():
from pytest import raises
from Lab01Code import encrypt_message, decrypt_message
from os import urandom
K = urandom(16)
message = u"Hello World!"
iv, ciphertext, tag = encrypt_message(K, message)
with raises(Exception) as excinfo:
decrypt_message(K, iv, urandom(len(ciphertext)), tag)
assert 'decryption failed' in str(excinfo.value)
with raises(Exception) as excinfo:
decrypt_message(K, iv, ciphertext, urandom(len(tag)))
assert 'decryption failed' in str(excinfo.value)
with raises(Exception) as excinfo:
decrypt_message(K, urandom(len(iv)), ciphertext, tag)
assert 'decryption failed' in str(excinfo.value)
with raises(Exception) as excinfo:
decrypt_message(urandom(len(K)), iv, ciphertext, tag)
assert 'decryption failed' in str(excinfo.value)
