Re: RC5 algorithm

AFAIK because you're not using the entire plaintext input, but only the 
first bit, the end cipher is different from what you see on the RSA web 
page.
This is because your keytable (S[]) is builded with a messed up input 
(key[]) in L[], which in turn will be different depending on the length (b) 
of your input.
That's also why John didn't end up with an error, since the algorithm used 
is still correct. :)

[: wacco :]

>From: Martin Klingensmith <[email protected]>
>
>The ciphertext should match the ciphertext on the RSA website, should it
>not? Check here:
><http://www.rsasecurity.com/rsalabs/node.asp?id=2105>
>"RC5-32/12/9-test"
>
>key: c9 0c 03 53 c0 d4 e1 fe 85
>plaintext, first two 32-bit words: 54 68 65 20 75 6e 6b 6e
>ciphertext: 5a 28 2d 56 2a 85 b7 2f
>
>--
>Martin Klingensmith
>
>John L. Bass wrote:
>
> >What architecture cpu are you running your tests on?
> >
> >Works fine from:
> >
> >	[jbass@dmsd ~]$ uname -a
> >	Linux dmsd.com 2.6.10-1.770_FC3smp #1 SMP Thu Feb 24 14:20:06 EST 2005 
>i686 i686 i386 GNU/Linux
> >	[jbass@dmsd ~]$ vi rc5ref.c
> >	[jbass@dmsd ~]$ make rc5ref
> >	cc     rc5ref.c   -o rc5ref
> >	[jbass@dmsd ~]$ ./rc5ref
> >	key = C9 0C 03 53 C0 D4 E1 FE 85
> >	   plaintext 54686520 756E6B6E  --->  ciphertext E61759B8 36808E74
> >
> >John
> >_______________________________________________
> >Hardware mailing list
> >Hardware-Ra3b/QYEcJ3d140v2zMXi0fjHoOT/h/[email protected]
> >http://lists.distributed.net/mailman/listinfo/hardware
> >
> >
>
>_______________________________________________
>Hardware mailing list
>Hardware-Ra3b/QYEcJ3d140v2zMXi0fjHoOT/h/[email protected]
>http://lists.distributed.net/mailman/listinfo/hardware


_______________________________________________
Hardware mailing list
Hardware-Ra3b/QYEcJ3d140v2zMXi0fjHoOT/h/[email protected]
http://lists.distributed.net/mailman/listinfo/hardware