public RsaAlgorithm(RsaCngAdapter rsaCngAdapter)
{
RsaCngAdapter = rsaCngAdapter;
}
internal static RsaAlgorithm ResolveRsaAlgorithm(SecurityKey key, string algorithm, bool requirePrivateKey)
{
if (key == null)
{
return(null);
}
if (key is RsaSecurityKey rsaKey)
{
if (rsaKey.Rsa != null)
{
#if NETSTANDARD1_4
return(new RsaAlgorithm(rsaKey.Rsa));
#else
if (rsaKey.Rsa is RSACryptoServiceProvider rsa)
{
return(new RsaAlgorithm(new RSACryptoServiceProviderProxy(rsa)));
}
else if (RsaCngAdapter.IsRsaCngSupported())
{
return(new RsaAlgorithm(new RsaCngAdapter(rsaKey.Rsa)));
}
#endif
}
else
{
#if NETSTANDARD1_4
var rsaAlgorithm = new RsaAlgorithm(RSA.Create());
rsaAlgorithm.Rsa.ImportParameters(rsaKey.Parameters);
#else
var rsaCapiProvider = new RSACryptoServiceProvider();
rsaCapiProvider.ImportParameters(rsaKey.Parameters);
var rsaAlgorithm = new RsaAlgorithm(new RSACryptoServiceProviderProxy(rsaCapiProvider));
#endif
rsaAlgorithm.ShouldDispose = true;
return(rsaAlgorithm);
}
}
if (key is X509SecurityKey x509Key)
{
#if NETSTANDARD1_4
if (requirePrivateKey)
{
return(new RsaAlgorithm(x509Key.PrivateKey as RSA));
}
else
{
return(new RsaAlgorithm(x509Key.PublicKey as RSA));
}
#else
if (requirePrivateKey)
{
return(new RsaAlgorithm(new RSACryptoServiceProviderProxy(x509Key.PrivateKey as RSACryptoServiceProvider)));
}
else
{
return(new RsaAlgorithm(new RSACryptoServiceProviderProxy(x509Key.PublicKey as RSACryptoServiceProvider)));
}
#endif
}
if (key is JsonWebKey webKey && webKey.Kty == JsonWebAlgorithmsKeyTypes.RSA)
{
#if NETSTANDARD1_4
var rsaAlgorithm = new RsaAlgorithm(RSA.Create());
rsaAlgorithm.Rsa.ImportParameters(webKey.CreateRsaParameters());
#else
var rsaCapiProvider = new RSACryptoServiceProvider();
rsaCapiProvider.ImportParameters(webKey.CreateRsaParameters());
var rsaAlgorithm = new RsaAlgorithm(new RSACryptoServiceProviderProxy(rsaCapiProvider));
#endif
rsaAlgorithm.ShouldDispose = true;
return(rsaAlgorithm);
}
return(null);
}