finish for init core

fuware/core/security/hasher.py

@@ -0,0 +1,34 @@
+from functools import lru_cache
+from typing import Protocol
+import bcrypt
+
+from fuware.core.config import get_app_settings
+
+
+class Hasher(Protocol):
+  def hash(self, password: str) -> str: ...
+
+  def verify(self, password: str, hashed: str) -> bool: ...
+
+class FakeHasher:
+  def hash(self, password: str) -> str:
+    return password
+
+  def verify(self, password: str, hashed: str) -> bool:
+    return password == hashed
+
+class BcryptHasher:
+  def hash(self, password: str) -> str:
+    return bcrypt.hashpw(password.encode('utf-8'), bcrypt.gensalt()).decode('utf-8')
+
+  def verify(self, password: str, hashed: str) -> bool:
+    return bcrypt.checkpw(password.encode('utf-8'), hashed.encode('utf-8'))
+
+@lru_cache(maxsize=1)
+def get_hasher() -> Hasher:
+    settings = get_app_settings()
+
+    if settings.TESTING:
+        return FakeHasher()
+
+    return BcryptHasher()