"Karel Kral" <kral.k***@volny.cz> wrote in message
news:%23y7VPxxBHHA.4680@TK2MSFTNGP04.phx.gbl...
> Hello,
> I have CAPICOM encrypted data. Data cames from VB6 application (see
> sample bellow). Now I want to decrypt this data in VB.NET (or C#).
>
> Are there native .NET 2.0 library to decrypt CAPICOM data or I must have
> import CAPICOM interop and use this one?
>
> Example of VB.NET encryption:
>  Dim message As New EncryptedData
>  message.Content = txtPrefix.Text & cbId.Text & txtHodnota
>  message.SetSecret txtPwd.Text
>  message.Algorithm.Name = CAPICOM_ENCRYPTION_ALGORITHM_DES
>  CryptMsg message.Encrypt
>
>
> Example of VB.NET decryption:
> Set message = New EncryptedData
>        message.SetSecret mvarKreditVerze
>        message.Decrypt "Key"
>        DecryptMsg = message.Content
>
> Karel Kral

> My understanding is that the CAPICOM encryption format is proprietary to
> CAPICOM (unliked their signed and enveloped structures, which are standard),
> so you must use CAPICOM to decrypt as well.  You can do this from .NET via
> COM Interop.
>
> Joe K.
>

"Karel Kral" <kral.k***@volny.cz> wrote in message
news:%23CR1wC8BHHA.4908@TK2MSFTNGP03.phx.gbl...
> Thanks, it is I was worry about. So I must to say goodbye to XCopy
> deployment (CAPICOM must me registered ActiveX).
>
> On 13.11.2006 16:14, Joe Kaplan wrote:
>> My understanding is that the CAPICOM encryption format is proprietary to
>> CAPICOM (unliked their signed and enveloped structures, which are
>> standard),
>> so you must use CAPICOM to decrypt as well.  You can do this from .NET
>> via
>> COM Interop.
>>
>> Joe K.
>>

> Or say goodbye to CAPICOM, yes.  Sorry.  Personally, I'd try to avoid using
> this feature of CAPICOM as it is proprietary and just asking for trouble.
> I'd use the Enveloped data support with EnvelopedCms in .NET 2.0 (or the
> crypto message stuff in crypto API for native support).  You may be stuck
> with an existing thing you can't change though.
>
> Joe K.
>