/// <summary>
/// This method returns an AsymmetricSignatureDeFormatter capable of supporting Sha256 signatures.
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
internal static AsymmetricSignatureDeformatter GetSignatureDeFormatterForSha256( AsymmetricSecurityKey key )
{
RSAPKCS1SignatureDeformatter deformatter;
AsymmetricAlgorithm algorithm = key.GetAsymmetricAlgorithm( SecurityAlgorithms.RsaSha256Signature, false );
RSACryptoServiceProvider rsaProvider = algorithm as RSACryptoServiceProvider;
if ( null != rsaProvider )
{
return GetSignatureDeFormatterForSha256( rsaProvider );
}
else
{
//
// If not an RSaCryptoServiceProvider, we can only hope that
// the derived imlementation does the correct thing WRT Sha256.
//
deformatter = new RSAPKCS1SignatureDeformatter( algorithm );
}
return deformatter;
}
