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Message-ID: <CAOCX9Dm4ApS5me1Een+nanjF-JNQSxyVRcZPfhsD=kqBBLz2tg@mail.gmail.com>
Date: Fri, 7 Jan 2022 00:03:19 -0800
From: Lokkju Brennr <lokkju@...il.com>
To: john-users@...ts.openwall.com
Subject: Support for truncated pbkdf2-hmac-sha1 hashes?
I'm working on adding support for cracking the keys used in Chrome's Sync
system, Nigori, when a custom sync password is set. It can be converted to
a standard pbkdf2-hmac-sha1 format (with a static salt, even), except that
Nigori only uses a 16 byte hash length.
pbkdf2-hmac-sha1 seems to support variable salt lengths, but expects a 20
byte hash length, even though PBKDF2HMAC regularly supports custom hash
lengths.
Other than adding a new format, or modifying the current format, is there
any easy way to handle truncated hashes like this?
Thanks!
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