Island: Add IAgentBinaryRepository

Issue #1974

monkey/monkey_island/cc/repository/__init__.py

@@ -1 +1,2 @@
 from .file_storage import FileRetrievalError, IFileRepository, LocalStorageFileRepository
+from .i_agent_binary_repository import IAgentBinaryRepository

monkey/monkey_island/cc/repository/i_agent_binary_repository.py

@@ -0,0 +1,24 @@
+import abc
+from typing import BinaryIO
+
+
+class IAgentBinaryRepository(metaclass=abc.ABCMeta):
+    """
+    A repository that retrieves the agent binaries
+    """
+
+    @abc.abstractmethod
+    def get_linux_binary(self) -> BinaryIO:
+        """
+        Retrieve linux agent binary
+
+        :return: A file-like object that represents the linux agent binary
+        """
+
+    @abc.abstractmethod
+    def get_windows_binary(self) -> BinaryIO:
+        """
+        Retrieve windows agent binary
+
+        :return: A file-like object that represents the windows agent binary
+        """