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Message-ID: <20111220103950.GB8669@openwall.com>
Date: Tue, 20 Dec 2011 14:39:50 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Bit slice implementation of DES based hashes
On Tue, Dec 20, 2011 at 08:16:53AM +0530, piyush mittal wrote:
> Implementation is completed and I have used Unicodes as well and that is
> working fine but I am getting self test failed this is because the
> implementation is not fully correct.
Well, then you don't know if it's in fact completed or not. It might as
well be totally wrong, needing a complete rewrite before it can work.
Please try to get it working for at least one test vector.
> The crypt function of LM on which this
> implem. is based upon have ECB mode.
It does not have any mode. It is a single DES encryption.
> but in oracle we need CBC,
Like I said before, you may implement CBC mode externally to that function.
> char *plain_salt_mix=utf16_to_utf8(cur_salt); //cur_salt is a combination
> of (username+password) in UTF 16
> length=strlen(plain_salt_mix);
>
> *
> *for(i=0;i<length;i++)
> DES_bs_all.B[i][0]=plain_salt_mix[i];
>
> for(j=i;i<64-length;i++)
> DES_bs_all.B[i][0]=0;
>
> Is this correct?
I don't understand what you're trying to achieve with this, but it can't
possibly be correct.
Let's get back to the basics:
Can you please describe what bitslicing is, in your own words?
What portion(s) of the DES block(s) does each element of B[] hold?
What portion(s) of the DES key(s) does each element of K[] hold?
Thanks,
Alexander
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