word 97 decryption finally completed

Caolan McNamara (Caolan.McNamara@ul.ie)
Mon, 13 Sep 1999 14:27:38 +0100 (IST)

word 97 decryption has now been fully implemented.
contains a utility that can decrypt word97 docs given the
correct password.

development version 0.5.29 and above of wv at
(or in abiword cvs) has this ability built in for conversion of
word docs to other formats.

The missing link that was eluding me was pointed out by
Dmitry Sumin <sumin@lostpassword.com> and simultaneously
found and implemented by Dieter Spaar <spaar@mirider.augusta.de>,
full kudos to him.

In short the index number of each page of ciphertext (each 0x200 unit)
modifies the data that is passed into the rc4 key preparation.


Real Life: Caolan McNamara * Doing: MSc in HCI
Work: Caolan.McNamara@ul.ie * Phone: +353-86-8790257
URL: http://www.csn.ul.ie/~caolan * Sig: an oblique strategy
Discard an axiom

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