actualizado 3-sept

2026-09-03 19:40:44 +02:00
parent 89992823b4
commit 5d2912f789
4338 changed files with 350157 additions and 386 deletions
@@ -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 <[email protected]>.
+    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:]