README.md edited

.venv/lib/python3.10/site-packages/openpyxl/utils/protection.py

@@ -0,0 +1,22 @@
+# Copyright (c) 2010-2024 openpyxl
+
+
+def hash_password(plaintext_password=''):
+    """
+    Create a password hash from a given string for protecting a worksheet
+    only. This will not work for encrypting a workbook.
+
+    This method is based on the algorithm provided by
+    Daniel Rentz of OpenOffice and the PEAR package
+    Spreadsheet_Excel_Writer by Xavier Noguer <xnoguer@rezebra.com>.
+    See also http://blogs.msdn.com/b/ericwhite/archive/2008/02/23/the-legacy-hashing-algorithm-in-open-xml.aspx
+    """
+    password = 0x0000
+    for idx, char in enumerate(plaintext_password, 1):
+        value = ord(char) << idx
+        rotated_bits = value >> 15
+        value &= 0x7fff
+        password ^= (value | rotated_bits)
+    password ^= len(plaintext_password)
+    password ^= 0xCE4B
+    return str(hex(password)).upper()[2:]