// constructor for silent WinTrustDataChoice.File check
public WinTrustData(WinTrustFileInfo fileInfo)
{
WinTrustFileInfo wtfiData = fileInfo;
FileInfoPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(WinTrustFileInfo)));
Marshal.StructureToPtr(wtfiData, FileInfoPtr, false);
using (WinTrustSignatureSettings signatureSettings = new WinTrustSignatureSettings())
{
SignatureSettings = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(WinTrustSignatureSettings)));
Marshal.StructureToPtr(signatureSettings, SignatureSettings, false);
}
}
public static bool VerifyEmbeddedSignature(string fileName)
{
using (WinTrustFileInfo wtfi = new WinTrustFileInfo(fileName))
{
using (WinTrustData wtd = new WinTrustData(wtfi))
{
Guid guidAction = new Guid(WINTRUST_ACTION_GENERIC_VERIFY_V2);
WinVerifyTrustResult result = WinVerifyTrust(INVALID_HANDLE_VALUE, guidAction, wtd);
return(result == WinVerifyTrustResult.Success ||
result == WinVerifyTrustResult.UntrustedRoot ||
result == WinVerifyTrustResult.CertChaining);
}
}
}
