tests: Add unit tests for key based encryptor

monkey/tests/unit_tests/monkey_island/cc/server_utils/encryption/test_key_based_encryptor.py

@@ -0,0 +1,19 @@
+from monkey_island.cc.server_utils.encryption import KeyBasedEncryptor
+
+PLAINTEXT = "password"
+PLAINTEXT_UTF8 = "slaptažodis"  # "password" in Lithuanian
+KEY = b"\x84\xd4qA\xb5\xd4Y\x9bH.\x14\xab\xd8\xc7+g\x12\xfa\x80'%\xfd#\xf8c\x94\xb9\x96_\xf4\xc51"
+
+kb_encryptor = KeyBasedEncryptor(KEY)
+
+
+def test_encrypt_decrypt_string_with_key():
+    encrypted = kb_encryptor.encrypt(PLAINTEXT)
+    decrypted = kb_encryptor.decrypt(encrypted)
+    assert decrypted == PLAINTEXT
+
+
+def test_encrypt_decrypt_string_utf8_with_key():
+    encrypted = kb_encryptor.encrypt(PLAINTEXT_UTF8)
+    decrypted = kb_encryptor.decrypt(encrypted)
+    assert decrypted == PLAINTEXT_UTF8