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