Java and .NET interop on (RSA) signatures

Question

I\'m signing some data on a .net-based smartcard and trying to verify that signature in a java environment - but without success.

Smartcard (c#):

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Answer 1

// In a different method, rsaParams.Exponent and rsaParams.Modulus are set

To set the private exponent in an RSA key, you should use RSAParameters.D. RSAParameters.Exponent is for the public exponent.