CODEWITHSUNDEEP
.netrsasmartcard
eldeperky
eldeperky

Reputation: 11

.NET Sign data with smartcard

I'm trying to use the following code to sign some data using a key stored in smartcard

CspParameters csp = new CspParameters(1, "Advanced Card Systems CSP v3.0"); csp.Flags = CspProviderFlags.UseDefaultKeyContainer; RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(csp);

the app work on the first time, but second time throws an exception while executing line "3".

the exception message is "The parameter is incorrect.".

Upvotes: 1

Views: 334

Answers (1)

Maverick
Maverick

Reputation: 801

ImportParameters method have two reasons to throw this CryptographicException.

"The Cryptographic Service Provider (CSP) cannot be acquired". Another is "The parameters parameter has missing fields". See the below page for more information - RSA CSP Import Parameters. The first solution, try the below code and let me know the result.

RSACryptoServiceProvider.UseMachineKeyStore = True

The error message shows that CSP missed parameter fields. Please refer to the page and test the example - Cryptography CSP Parameters.

Upvotes: 1

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