Re: How to use my own algrithum in S/MIME of Outlook Express?

From: cable00 (cable00_at_discussions.microsoft.com)
Date: 11/25/04

  • Next message: Andrew White: "Access to ephemeral PEAP keys from IAS plugin" 
    Date: Wed, 24 Nov 2004 19:13:02 -0800

    Thanks to Kelvin Yiu

    I still want to know is there a way to make Outlook Express use my
    algorithm,like register an OID , implement my encoder/decoder etc, and How to
    do it ?

    "Kelvin Yiu [MS]" wrote:

    > The short answer is no.
    >
    > Although you can write your own algorithms in a custom CSP, you cannot
    > easily plug in the functions necessary to encode and decode ASN.1 structures
    > that store public keys in certificates or key wrapping in s/mime messages.
    > The X.509 and CMS APIs in CryptoAPI were not designed to support pluggable
    > crypto - especially custom asymmetric algorithms.
    >
    > --
    > Kelvin Yiu [MS]
    > This posting is provided "AS IS" with no warranties, and confers no rights
    >
    > "cable00" <cable00@discussions.microsoft.com> wrote in message
    > news:AB58D75E-35C2-44DF-ABB6-76C66EA2ACA8@microsoft.com...
    > > Hi to all:
    > >
    > > I implemented my own CSP which has my own encryption algrithum . I
    > > try
    > > to send S/MIME email use my own CSP and my algrithum in Outlook express.
    > > Certificates in MY store are set KEY_PROV_INFO to point to my CSP.
    > >
    > > But,
    > > 1. I can't select my algrithum in Outlook Express's
    > > Tool|account|security, the default algrithum shows
    > >
    > > 2. Outlook Express uses the default CSP to verity the incoming email
    > > signature and encrypt the outgoing email, but I want to use my own CSP.
    > >
    > > I want to know how to resolve my problem?
    > >
    > > best regards
    > >
    > > cable00
    > >
    >
    >
    >

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