private static IntPtr GetProviderInfo(X509Certificate2 cert)
{
if (cert == null || !cert.HasPrivateKey)
{
return(IntPtr.Zero);
}
ICspAsymmetricAlgorithm key = (ICspAsymmetricAlgorithm)cert.PrivateKey;
const int PVK_TYPE_KEYCONTAINER = 2;
if (key == null)
{
return(IntPtr.Zero);
}
SIGNER_PROVIDER_INFO providerInfo = new SIGNER_PROVIDER_INFO
{
cbSize = (uint)Marshal.SizeOf(typeof(SIGNER_PROVIDER_INFO)),
pwszProviderName = Marshal.StringToHGlobalUni(key.CspKeyContainerInfo.ProviderName),
dwProviderType = (uint)key.CspKeyContainerInfo.ProviderType,
dwPvkChoice = PVK_TYPE_KEYCONTAINER,
Union1 = new SIGNER_PROVIDER_INFO.SignerProviderUnion
{
pwszKeyContainer = Marshal.StringToHGlobalUni(key.CspKeyContainerInfo.KeyContainerName)
},
};
IntPtr pProviderInfo = Marshal.AllocHGlobal(Marshal.SizeOf(providerInfo));
Marshal.StructureToPtr(providerInfo, pProviderInfo, false);
return(pProviderInfo);
}
private static IntPtr GetProviderPointer(string containerName)
{
var providerInfo = new SIGNER_PROVIDER_INFO
{
cbSize = (uint)Marshal.SizeOf <SIGNER_PROVIDER_INFO>(),
pwszProviderName = Marshal.StringToHGlobalUni(Constants.CryptoProviderName),
dwProviderType = Constants.PROV_RSA_FULL,
dwPvkChoice = Constants.PVK_TYPE_KEYCONTAINER,
PvkChoice = new SIGNER_PROVIDER_INFO.PvkChoiceUnion
{
pwszKeyContainer = Marshal.StringToHGlobalUni(containerName)
}
};
var providerHandle = Marshal.AllocHGlobal(Marshal.SizeOf <SIGNER_PROVIDER_INFO>());
Marshal.StructureToPtr(providerInfo, providerHandle, false);
return(providerHandle);
}
