private static void SetPrivateKeyProperty(System.Security.Cryptography.SafeCertContextHandle safeCertContextHandle, ICspAsymmetricAlgorithm asymmetricAlgorithm)
{
SafeLocalAllocHandle invalidHandle = SafeLocalAllocHandle.InvalidHandle;
if (asymmetricAlgorithm != null)
{
CAPIBase.CRYPT_KEY_PROV_INFO structure = new CAPIBase.CRYPT_KEY_PROV_INFO {
pwszContainerName = asymmetricAlgorithm.CspKeyContainerInfo.KeyContainerName,
pwszProvName = asymmetricAlgorithm.CspKeyContainerInfo.ProviderName,
dwProvType = (uint)asymmetricAlgorithm.CspKeyContainerInfo.ProviderType,
dwFlags = asymmetricAlgorithm.CspKeyContainerInfo.MachineKeyStore ? 0x20 : 0,
cProvParam = 0,
rgProvParam = IntPtr.Zero,
dwKeySpec = (uint)asymmetricAlgorithm.CspKeyContainerInfo.KeyNumber
};
invalidHandle = CAPI.LocalAlloc(0x40, new IntPtr(Marshal.SizeOf(typeof(CAPIBase.CRYPT_KEY_PROV_INFO))));
Marshal.StructureToPtr(structure, invalidHandle.DangerousGetHandle(), false);
}
try
{
if (!CAPI.CertSetCertificateContextProperty(safeCertContextHandle, 2, 0, invalidHandle))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
}
finally
{
if (!invalidHandle.IsInvalid)
{
Marshal.DestroyStructure(invalidHandle.DangerousGetHandle(), typeof(CAPIBase.CRYPT_KEY_PROV_INFO));
invalidHandle.Dispose();
}
}
}
private static unsafe void SetFriendlyNameExtendedProperty(System.Security.Cryptography.SafeCertContextHandle safeCertContextHandle, string name)
{
SafeLocalAllocHandle handle = System.Security.Cryptography.X509Certificates.X509Utils.StringToUniPtr(name);
using (handle)
{
CAPIBase.CRYPTOAPI_BLOB cryptoapi_blob = new CAPIBase.CRYPTOAPI_BLOB {
cbData = (uint)(2 * (name.Length + 1)),
pbData = handle.DangerousGetHandle()
};
if (!CAPI.CertSetCertificateContextProperty(safeCertContextHandle, 11, 0, new IntPtr((void *)&cryptoapi_blob)))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
}
}
