RsaCryptoServiceProvider doubt

14 Feb 2007 6:48 PM

Victor Pereira

Hi,

I have a certificate and it's private key.

I'm accessing my certificate and my private key using the X509Certificate2.

My problem is: I can't pass to the RsaCryptoServiceProvider class my Private
and Public key. How can i do it ?

Thanks in advance,

Victor

15 Feb 2007 2:51 AM

Joe Kaplan

The X509Certificate2.PublicKey.Key property will give you an
RSACryptoServiceProvider for that certificate and the
X509Certificate.PrivateKey property will give you an AsymmetricAlgorithm
class you can use.

Joe K.

--
Joe Kaplan-MS MVP Directory Services Programming
Co-author of "The .NET Developer's Guide to Directory Services Programming"
http://www.directoryprogramming.net
--

Show quoteHide quote

"Victor Pereira" <pelas***@gmail.com> wrote in message
news:%23gDM4iGUHHA.1208@TK2MSFTNGP03.phx.gbl...
> Hi,
>
> I have a certificate and it's private key.
>
> I'm accessing my certificate and my private key using the
> X509Certificate2.
>
> My problem is: I can't pass to the RsaCryptoServiceProvider class my
> Private and Public key. How can i do it ?
>
> Thanks in advance,
>
> Victor
>

15 Feb 2007 12:42 PM

Victor Pereira

Hi Joe,

Ok thanks for your reply.

I think that i didn't explained very clearly my problem.

I don't know how can i get these properties and populate the
RsaCryptoServiceProvider structure to call the method Encrypt with my
private key. Understood ?

Thanks again,

Victor
Show quoteHide quote

"Joe Kaplan" <joseph.e.kap***@removethis.accenture.com> escreveu na mensagem
news:emermwKUHHA.528@TK2MSFTNGP03.phx.gbl...
> The X509Certificate2.PublicKey.Key property will give you an
> RSACryptoServiceProvider for that certificate and the
> X509Certificate.PrivateKey property will give you an AsymmetricAlgorithm
> class you can use.
>
> Joe K.
>
> --
> Joe Kaplan-MS MVP Directory Services Programming
> Co-author of "The .NET Developer's Guide to Directory Services
> Programming"
> http://www.directoryprogramming.net
> --
> "Victor Pereira" <pelas***@gmail.com> wrote in message
> news:%23gDM4iGUHHA.1208@TK2MSFTNGP03.phx.gbl...
>> Hi,
>>
>> I have a certificate and it's private key.
>>
>> I'm accessing my certificate and my private key using the
>> X509Certificate2.
>>
>> My problem is: I can't pass to the RsaCryptoServiceProvider class my
>> Private and Public key. How can i do it ?
>>
>> Thanks in advance,
>>
>> Victor
>>
>
>

15 Feb 2007 2:20 PM

Dominick Baier

are you sure you really wanna use the raw RSA key - or rather use the higher
level PKCS classes to encrypt the data?

Have a look at this article:
http://msdn.microsoft.com/msdnmag/issues/07/03/NETSecurity/default.aspx

-----
Dominick Baier (http://www.leastprivilege.com)

Developing More Secure Microsoft ASP.NET 2.0 Applications (http://www.microsoft.com/mspress/books/9989.asp)

Show quoteHide quote

> Hi Joe,
>
> Ok thanks for your reply.
>
> I think that i didn't explained very clearly my problem.
>
> I don't know how can i get these properties and populate the
> RsaCryptoServiceProvider structure to call the method Encrypt with my
> private key. Understood ?
>
> Thanks again,
>
> Victor
> "Joe Kaplan" <joseph.e.kap***@removethis.accenture.com> escreveu na
> mensagem
> news:emermwKUHHA.528@TK2MSFTNGP03.phx.gbl...
>> The X509Certificate2.PublicKey.Key property will give you an
>> RSACryptoServiceProvider for that certificate and the
>> X509Certificate.PrivateKey property will give you an
>> AsymmetricAlgorithm class you can use.
>>
>> Joe K.
>>
>> --
>> Joe Kaplan-MS MVP Directory Services Programming
>> Co-author of "The .NET Developer's Guide to Directory Services
>> Programming"
>> http://www.directoryprogramming.net
>> --
>> "Victor Pereira" <pelas***@gmail.com> wrote in message
>> news:%23gDM4iGUHHA.1208@TK2MSFTNGP03.phx.gbl...
>>> Hi,
>>>
>>> I have a certificate and it's private key.
>>>
>>> I'm accessing my certificate and my private key using the
>>> X509Certificate2.
>>>
>>> My problem is: I can't pass to the RsaCryptoServiceProvider class my
>>> Private and Public key. How can i do it ?
>>>
>>> Thanks in advance,
>>>
>>> Victor
>>>

18 Feb 2007 9:23 AM

Smorn

Guys,
How about this approach("cert" is X509Certificate2)?

RSACryptoServiceProvider rsa_pub =
(RSACryptoServiceProvider)cert.PublicKey.Key;
or
RSACryptoServiceProvider rsa_prv = (RSACryptoServiceProvider)cert.PrivateKey;

Smorn

Show quoteHide quote

"Victor Pereira" wrote:

> Hi Joe,
>
> Ok thanks for your reply.
>
> I think that i didn't explained very clearly my problem.
>
> I don't know how can i get these properties and populate the
> RsaCryptoServiceProvider structure to call the method Encrypt with my
> private key. Understood ?
>
> Thanks again,
>
> Victor
> "Joe Kaplan" <joseph.e.kap***@removethis.accenture.com> escreveu na mensagem
> news:emermwKUHHA.528@TK2MSFTNGP03.phx.gbl...
> > The X509Certificate2.PublicKey.Key property will give you an
> > RSACryptoServiceProvider for that certificate and the
> > X509Certificate.PrivateKey property will give you an AsymmetricAlgorithm
> > class you can use.
> >
> > Joe K.
> >
> > --
> > Joe Kaplan-MS MVP Directory Services Programming
> > Co-author of "The .NET Developer's Guide to Directory Services
> > Programming"
> > http://www.directoryprogramming.net
> > --
> > "Victor Pereira" <pelas***@gmail.com> wrote in message
> > news:%23gDM4iGUHHA.1208@TK2MSFTNGP03.phx.gbl...
> >> Hi,
> >>
> >> I have a certificate and it's private key.
> >>
> >> I'm accessing my certificate and my private key using the
> >> X509Certificate2.
> >>
> >> My problem is: I can't pass to the RsaCryptoServiceProvider class my
> >> Private and Public key. How can i do it ?
> >>
> >> Thanks in advance,
> >>
> >> Victor
> >>
> >
> >
>
>
>