On 26/11/14 06:39, Isaac Cajina wrote: > I need to open some documents and I do not remember my pass word.
LibO 3.4.5 and lower can write files whose password protection relies on Blowfish; LibO 3.4.4 and lower can read files whose password protection relies on Blowfish; LibO 3.4.5 and higher can read files whose password protection relies on AES-256; LibO 3.5.0 and higher can write files whose password protection relies on AES-256; The Crypto++ library contains routines for encrypting/decrypting blowfish, AES-256, and other algorithms for ciphers. In 2001, four or five firms, worldwide, offered commercial OOo password recovery services. One of the firms frankly admitted that they used brute force. The setup fee paid for the computers used for the "attack". The monthly fee covered the utility bills that the "attack" generated. FWIW, this firm now appears to be out of business. Once upon a time, there was an extension that did password recovery. I don't know how well it works/worked. I couldn't find it, when I searched the LibreOffice and Apache OpenOffice archives today. There are a couple of commercially distributed tools that _might_ work. The time required to brute force a solution can be reduced if: * The length of the password is known; * Part of the password is known; * Which glyphs the password uses are known; This issue comes up often enough, that I'm surprised I can't find an open source tool to brute force ODF passwords. It is a straightforward algorithm. Guess_password Throw_at_document If fails Guess_password If success read_document Guess_password is simply repeat until loops. jonathon -- To unsubscribe e-mail to: [email protected] Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/users/ All messages sent to this list will be publicly archived and cannot be deleted
