Restore access to locked LibreOffice and OpenOffice documents: Writer (.odt), Calc (.ods), Impress (.odp), and Draw (.odg). Files are processed in volatile memory and purged after recovery.
OpenDocument Format files are ZIP containers. When password-protected, individual streams within the container are encrypted using Blowfish (legacy) or AES-256 in CBC/CFB mode, with a key derived from the user password via PBKDF2-SHA-1 or PBKDF2-SHA-256.
We extract the PBKDF2 parameters and encrypted sample from the manifest.xml using libreoffice2john, then run John the Ripper against a curated 1,000-entry wordlist tuned for document passwords. Most common passwords complete in well under a second.