Re: 3DES with PROV_RSA_FULL ???

From: Mark_Pryor (mpryorVB@netsprintmail.com)
Date: 08/12/02 

From: "Mark_Pryor" <mpryorVB@netsprintmail.com>
Date: Mon, 12 Aug 2002 07:45:26 -0700

Hi,
Eric <eric.h@netcourrier.com> wrote in message
news:#zvHfycQCHA.2676@tkmsftngp10...
> Thanks for you answers Mark and you,
>
> I am not talking about the Provider which does support 3DES as written in
> the API doc.
> As i understand, each provider must be used with a provider type. This
> provider type supports a set of algorithms within the overall set of
> algorithms supported by the Provider.
> That means "Enhanced Provider" can support some algorithms which are not
> part of some provider types.
> In the API doc it is written that "Enhanced Prov" support 3DES but the
> PROV_RSA_FULL type does not include this algorithm...So i would need to use
> another provider type (that includes 3DES) along the "Enhanced provider" in
> order to use 3DES.
>
> I don't know if I am right and I would appreciate if someone could clarify
> it...

Yes you are right. The PROV_RSA_FULL is documented to only
allow the RC2, RC4 algorithms.

Why do you read the SDK Docs like a lawyer? Let the API speak for itself,
especially when it has methods like
    CryptGetProvParam / dwParam=PP_ENUMALGS

that expose the allowed algorithms. The latest release of WinXP allows
AES. Are you going to pretend that it shouldn't work cause those
ancient Docs don't mention it?

Most of the pages in the Crypto Docs were written in the early
days of IE5 (Nov 1999), when the laws restricting export of strong
cryptography were still on the books. They only mention a minimal
set of algos included with the Base provider.

regards,
Mark Pryor

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