Differences between CAPICOM TripleDES and System.Security.Cryptography TripleDES

I'm trying to move away from using CAPICOM since I can no longer use it (64-bit Windows 7 machine).

The existing code for using TripleDES is like this:

En开发者_StackOverflow中文版cryptedDataClass cryptic = new EncryptedDataClass();
cryptic.Algorithm.Name = CAPICOM_ENCRYPTION_ALGORITHM.CAPICOM_ENCRYPTION_ALGORITHM_3DES;
cryptic.SetSecret(secretKey, CAPICOM_SECRET_TYPE.CAPICOM_SECRET_PASSWORD);
cryptic.Content = stringToEncrypt;
encryptedString = cryptic.Encrypt(CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_ANY);

The only information supplied for the encryption is the secretKey. And the secretKey comes out to be about ten bytes. Is there a way use the .NET class to do the same encryption. Note: this is used to verify connection to a web service that will still be using CAPICOM. Any help or ideas are greatly appreciated.

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SetSecret is not a key!!

from MSDN:

CAPICOM_SECRET_TYPE Enumeration

The CAPICOM_SECRET_TYPE enumeration indicates the kind of secret used to derive a key to be used for encryption/decryption of data.

Constants CAPICOM_SECRET_PASSWORD The encryption key is to be derived from a password.

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Not exactly the answer to your question and nor is it ideal, but we hit the same issue with CAPICOM and got it to work in the 64bit world by:

• Copy the binary to [windows]\syswow64
• Register the service (run from within that path, regsvr32 capicon.dll)

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You can use CAPICOM from a 32-bit process on a 64-bit machine (obviously). If you are using it from script, you have to use the 32-bit versions of cscript.exe and wscript.exe. I.e:

c:\windows\sysWOW64\cscript.exe "c:\path\to\script.wsf"

c:\windows\sysWOW64\cscript.exe "c:\path\to\another\vbscript.vbs"

This works fine, I am doing it in production right now.

Also, this answer has a walkthrough of how to register a surrogate for CAPICOM so it can be used from 64-bit processes (including 64-bit script).

• 64 bit C# with a 32 bit VB6 COM object

I have actually done this to use CAPICOM from 64-bit SQL Server and it works fine.