Note that the John the Ripper version should be the Jumbo version to have the included scripts for extracting password hashes. It involves first extracting the hash using a script that is actually bundled with John the Ripper (jumbo community edition). Using John the Ripper to find the password of an Office Document is a relatively straight forward process. Password Recovery of Libre Office (openoffice) Documents using John the Ripper

Microsoft Office 2003 is not included as the number breaks the chart! Try our Libre Office password recovery tool here, to attempt to crack the password of an encrypted document.

Using a known list of passwords we can calculate hashes and attempt to recovery the password. However, there may be a slight variation in the encryption process depending on the version of Libreoffice.

The same encryption is used for different types of Open Office document including Writer (odt), Calc (ods), Impress (odp) and Draw (odg). Microsoft Office Document have a similar option to encrypt the document password recovery is then a similar process (Word doc / Excel xls). This is a similar methodology to the more basic hashing used in other hashes such as MD5 & SHA1. Recovery of the password can be attempted by retrieving the hash from the document and matching the hash against calculated hashes of known strings. Recovering ODF passwords is not a simple matter as the encryption algorithm used for Open Office documents is quite strong. Password protection can be added to these documents using the built in encryption option. Libre Office (Open Office) uses the Open Document Format (ODF) for saving files.

Best office password cracker