def test_decrypt_invalidKey(self):
key = keygenerator.generate()
cyphertext = aescypher.encrypt(self.plaintext, key)
invalid_key = keygenerator.generate()
while (invalid_key == key):
invalid_key = keygenerator.generate()
res = aescypher.decrypt(cyphertext, invalid_key)
self.assertNotEqual(self.plaintext, res)
def test_decrypt_key192(self):
key = keygenerator.generate(192)
cyphertext = aescypher.encrypt(self.plaintext, key)
res = aescypher.decrypt(cyphertext, key)
self.assertEqual(self.plaintext, res)
def test_decrypt_invalidMode(self):
key = keygenerator.generate()
cyphertext = aescypher.encrypt(self.plaintext, key)
with self.assertRaises(Exception):
aescypher.decrypt(cyphertext, key, "TST")
def test_decrypt_modeMismatch(self):
key = keygenerator.generate()
iv = keygenerator.generate(128)
cyphertext = aescypher.encrypt(self.plaintext, key, "CBC", iv)
res = aescypher.decrypt(cyphertext, key, "ECB")
self.assertNotEqual(self.plaintext, res)
def test_decrypt_CBC(self):
key = keygenerator.generate()
iv = keygenerator.generate(128)
cyphertext = aescypher.encrypt(self.plaintext, key, "CBC", iv)
res = aescypher.decrypt(cyphertext, key, "CBC", iv)
self.assertEqual(self.plaintext, res)
def test_decrypt_char(self):
key = keygenerator.generate()
plaintext = "a".encode()
cyphertext = aescypher.encrypt(plaintext, key)
res = aescypher.decrypt(cyphertext, key)
self.assertEqual(plaintext, res)
def test_decrypt_emptyPlaintext(self):
key = keygen.generate()
plaintext = "".encode()
cyphertext, iv = aescypher.encrypt(plaintext, key)
res = aescypher.decrypt(cyphertext, key, iv)
self.assertEqual(plaintext, res)
def test_decrypt_key128(self):
key = keygen.generate(128)
cyphertext, iv = aescypher.encrypt(self.plaintext, key)
res = aescypher.decrypt(cyphertext, key, iv)
self.assertEqual(self.plaintext, res)
def test_decrypt_givenIV(self):
key = keygen.generate()
iv = keygen.generate(128)
cyphertext = aescypher.encrypt(self.plaintext, key, iv)[0]
res = aescypher.decrypt(cyphertext, key, iv)
self.assertEqual(self.plaintext, res)
