private static unsafe SafeCertStoreHandle SelectFromStore(SafeCertStoreHandle safeSourceStoreHandle, string title, string message, X509SelectionFlag selectionFlags, IntPtr hwndParent)
{
int dwErrorCode = CAPI.ERROR_SUCCESS;
// First, create a memory store
SafeCertStoreHandle safeCertStoreHandle = CAPI.CertOpenStore((IntPtr)CAPI.CERT_STORE_PROV_MEMORY,
CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING,
IntPtr.Zero,
0,
null);
if (safeCertStoreHandle == null || safeCertStoreHandle.IsInvalid)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW csc = new CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW();
// Older versions of CRYPTUI do not check the size correctly,
// so always force it to the oldest version of the structure.
csc.dwSize = (uint)Marshal.OffsetOf(typeof(CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW), "hSelectedCertStore");
csc.hwndParent = hwndParent;
csc.dwFlags = (uint)selectionFlags;
csc.szTitle = title;
csc.dwDontUseColumn = 0;
csc.szDisplayString = message;
csc.pFilterCallback = IntPtr.Zero;
csc.pDisplayCallback = IntPtr.Zero;
csc.pvCallbackData = IntPtr.Zero;
csc.cDisplayStores = 1;
IntPtr hSourceCertStore = safeSourceStoreHandle.DangerousGetHandle();
csc.rghDisplayStores = new IntPtr(&hSourceCertStore);
csc.cStores = 0;
csc.rghStores = IntPtr.Zero;
csc.cPropSheetPages = 0;
csc.rgPropSheetPages = IntPtr.Zero;
csc.hSelectedCertStore = safeCertStoreHandle.DangerousGetHandle();
SafeCertContextHandle safeCertContextHandle = CAPI.CryptUIDlgSelectCertificateW(csc);
if (safeCertContextHandle != null && !safeCertContextHandle.IsInvalid)
{
// Single select, so add it to our hCertStore
SafeCertContextHandle ppStoreContext = SafeCertContextHandle.InvalidHandle;
if (!CAPI.CertAddCertificateContextToStore(safeCertStoreHandle,
safeCertContextHandle,
CAPI.CERT_STORE_ADD_NEWER_INHERIT_PROPERTIES,
ppStoreContext))
{
dwErrorCode = Marshal.GetLastWin32Error();
}
}
if (dwErrorCode != CAPI.ERROR_SUCCESS)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(safeCertStoreHandle);
}
