diff options
Diffstat (limited to '.venv/lib/python3.12/site-packages/openpyxl/utils/protection.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/openpyxl/utils/protection.py | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/openpyxl/utils/protection.py b/.venv/lib/python3.12/site-packages/openpyxl/utils/protection.py new file mode 100644 index 00000000..cc7707ee --- /dev/null +++ b/.venv/lib/python3.12/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:] |