Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 20 Dec 2011 08:16:53 +0530
From: piyush mittal <piyush.cse29@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Bit slice implementation of DES based hashes

Hi,

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.The crypt function of LM on which this
implem. is based upon have ECB mode.but in oracle we need CBC, so we have
not used any initialisation vector concept.Also I have initialised B in
following way before calling DES_bs_crypt_LM()  (I have removed B
initialization(i.e DES_bs_set_block_8()) in this 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?

Thanks,





On Sun, Dec 18, 2011 at 11:03 PM, piyush mittal <piyush.cse29@...il.com>wrote:

> Correct sequence is
>
> 00000000
> 00010001
> 00100010
> 00110011
> 01000100
> 01010101
> 01100110
> 01110111
>
> And you are extremely right.String will be
> "\x80\x11\x22\x33\x44\x55\x66\x77"
>
> Thanks a lot.
>
> On Sun, Dec 18, 2011 at 8:37 PM, Solar Designer <solar@...nwall.com>wrote:
>
>> On Sun, Dec 18, 2011 at 08:22:35PM +0530, piyush mittal wrote:
>> > Even if I drops the parity bits then remaining 56 bits are as follows
>> >
>> > 00000000010001010001001100111000100101010111001101110111
>> >
>> > and its corresponding  ASCII equivalent I am not getting.
>>
>> I did not verify the above binary value (in fact, it looks wrong to me),
>> but I see no problem in converting it to an ASCII equivalent for
>> DES_bs_set_key() or DES_bs_set_key_LM() (these ASCII strings would be
>> different).  In fact, I already posted it for DES_bs_set_key():
>>
>> > > "\x80\x11\x22\x33\x44\x55\x66\x77"
>>
>> Alexander
>>
>
>
>
> --
> Piyush Mittal
> Department of Computer Science and Engineering
> National Institute of Technology,Rourkela
> INDIA
>
>
>


-- 
Piyush Mittal
Department of Computer Science and Engineering
National Institute of Technology,Rourkela
INDIA

[ CONTENT OF TYPE text/html SKIPPED ]

Powered by blists - more mailing lists

Your e-mail address:

Powered by Openwall GNU/*/Linux - Powered by OpenVZ