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Date: Mon, 4 Mar 2013 19:23:39 +0100
From: magnum <>
Subject: Re: dmg2john used and password cracked, hdiutil fails to accept it

On 4 Mar, 2013, at 8:06 , Milen Rangelov <> wrote:

>> Are you using the same v1 test in hashkill btw? I'm not sure how we can
>> improve it without changing dmg2john so it stores data just like for v2.
> hashkill does the header parsing in the plugin itself. I had it hardcoded
> to 1000, then switched to getting the header's  iterations count and now
> again to 1000 for v1. I guess we can safely assume that v1 headers will
> always use 1000? I think v1 is not used anymore for a couple of osx
> versions back.

Yes, but I meant the verification during cracking. I don't quite get the apple_des3_ede_unwrap_key1() function in our format but it does not compare the decrypted stuff with anything known. It just rejects hashes when certain EVP decrypt calls return non-zero. I presume this means we are accepting any candidate that happens to pass the padding check? This should merely pose as early reject and we need more stringent tests following it.


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