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[REBOL] Re: Proxy

From: holger:rebol at: 16-Jul-2001 8:27

On Fri, Jul 13, 2001 at 03:50:55PM +0200, Nenad Rakocevic wrote:
> Yes it's possible, but there's a hard part : you have to implement DES and MD4 in Rebol
DES is already supported by REBOL/Command 2.0. We might add MD4 support in one of the next updates.
> which is > not really a simple thing to do with Rebol scalar types. Their bit size is lesser than the C or > Java equivalent,
No. REBOL uses 32 bit integers, just like most other languages. Integers are always signed, but for the types of calculations done in MD4 and DES this should not matter, except additions/subtractions have to be done carefully to avoid overflows. An alternative is to use a 16-bit implementation of MD4/DES. That gets you around the signed vs unsigned problem.
> resulting in a painfull work to adapt the algos in Rebol. The 'Bignumber component > should be the solution for such works as soon as RT will release some docs on it.
No, bignum uses variable-length integers, primarily for modulo arithmetics. It helps for RSA, DSA and Diffie Hellman, but is rather useless for DES, MD4 etc. Besides at the moment there is no bignum! datatype yet, so you cannot access the component from the REBOL layer.
> The http scheme should also be modified to work with M$ Proxy Server, because MPS doesn't strictly > obey to the http standard. (as always with M$!) Any volonteer to make a tunnel through the Death Star ? ;)
Do you have the specs for MS-Proxy in HTTP ? -- Holger Kruse [holger--rebol--com]