added module for unix compatibility

src/passwordlib/unix/__init__.py

@@ -0,0 +1,6 @@
+# -*- coding=utf-8 -*-
+r"""
+Compatibility for the widely used unix formats
+"""
+from . import encrypt
+from . import loading

src/passwordlib/unix/encrypt.py

@@ -0,0 +1,14 @@
+# -*- coding=utf-8 -*-
+r"""
+
+"""
+
+
+__all__ = ['encrypt_sha1']
+
+
+def encrypt_sha1(password: str):
+    from hashlib import sha1
+    from base64 import b64encode
+    hashed = sha1(password.encode()).digest()
+    return "{SHA1}" + b64encode(hashed).decode()

src/passwordlib/unix/loading.py

@@ -0,0 +1,17 @@
+# -*- coding=utf-8 -*-
+r"""
+
+"""
+from ..core import LoadedTuple
+
+
+__all__ = ['load_sha1']
+
+
+def load_sha1(dump: str) -> LoadedTuple:
+    from base64 import b64decode
+    if not dump.startswith("{SHA}"):
+        raise ValueError("Invalid dump format")
+    b64encoded = dump[6:]
+    hashed = b64decode(b64encoded)
+    return LoadedTuple(algorithm="sha1", iterations=-1, salt=b'', hashed=hashed)