Island, UT: Add String field encryptor

This encryptor is going to be used by dict_encryptor
to encrypt/decrypt the ssh_keypairs dictionaries

monkey/monkey_island/cc/server_utils/encryption/__init__.py

@@ -24,3 +24,4 @@ from .dict_encryptor import (
 )
 from .field_encryptors.i_field_encryptor import IFieldEncryptor
 from .field_encryptors.string_list_encryptor import StringListEncryptor
+from .field_encryptors.string_encryptor import StringEncryptor

monkey/monkey_island/cc/server_utils/encryption/field_encryptors/__init__.py

@@ -1,2 +1,3 @@
 from .i_field_encryptor import IFieldEncryptor
 from .string_list_encryptor import StringListEncryptor
+from .string_encryptor import StringEncryptor

monkey/monkey_island/cc/server_utils/encryption/field_encryptors/string_encryptor.py

@@ -0,0 +1,12 @@
+from ..data_store_encryptor import get_datastore_encryptor
+from . import IFieldEncryptor
+
+
+class StringEncryptor(IFieldEncryptor):
+    @staticmethod
+    def encrypt(value: str):
+        return get_datastore_encryptor().encrypt(value)
+
+    @staticmethod
+    def decrypt(value: str):
+        return get_datastore_encryptor().decrypt(value)

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

@@ -0,0 +1,17 @@
+from monkey_island.cc.server_utils.encryption import StringEncryptor
+
+MOCK_STRING = "m0nk3y"
+EMPTY_STRING = ""
+
+
+def test_encryptor(uses_encryptor):
+    encrypted_string = StringEncryptor.encrypt(MOCK_STRING)
+    assert not encrypted_string == MOCK_STRING
+    decrypted_string = StringEncryptor.decrypt(encrypted_string)
+    assert decrypted_string == MOCK_STRING
+
+
+def test_empty_string(uses_encryptor):
+    # Tests that no erros are raised
+    encrypted_string = StringEncryptor.encrypt(EMPTY_STRING)
+    StringEncryptor.decrypt(encrypted_string)