public X509Chain(IntPtr chainContext)
{
if (chainContext == IntPtr.Zero)
{
throw new ArgumentNullException("chainContext");
}
m_safeCertChainHandle = CAPI.CertDuplicateCertificateChain(chainContext);
if (m_safeCertChainHandle == null || m_safeCertChainHandle == SafeCertChainHandle.InvalidHandle)
{
throw new CryptographicException(SR.GetString(SR.Cryptography_InvalidContextHandle), "chainContext");
}
Init();
}
private unsafe void Init()
{
using (SafeCertChainHandle safeCertChainHandle = CAPI.CertDuplicateCertificateChain(m_safeCertChainHandle)) {
CAPI.CERT_CHAIN_CONTEXT pChain = new CAPI.CERT_CHAIN_CONTEXT(Marshal.SizeOf(typeof(CAPI.CERT_CHAIN_CONTEXT)));
uint cbSize = (uint)Marshal.ReadInt32(safeCertChainHandle.DangerousGetHandle());
if (cbSize > Marshal.SizeOf(pChain))
{
cbSize = (uint)Marshal.SizeOf(pChain);
}
X509Utils.memcpy(m_safeCertChainHandle.DangerousGetHandle(), new IntPtr(&pChain), cbSize);
m_status = pChain.dwErrorStatus;
Debug.Assert(pChain.cChain > 0);
m_chainElementCollection = new X509ChainElementCollection(Marshal.ReadIntPtr(pChain.rgpChain));
}
}