// constructor for silent WinTrustDataChoice.File check
public WinTrustData(String _fileName, WinTrustDataRevocationChecks revocationChecks)
{
RevocationChecks = revocationChecks;
WinTrustFileInfo wtfiData = new WinTrustFileInfo(_fileName);
FileInfoPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(WinTrustFileInfo)));
Marshal.StructureToPtr(wtfiData, FileInfoPtr, false);
}
public WinTrustData(
WinTrustDataUIChoice uiChoice,
WinTrustDataRevocationChecks revocationCheck,
WinTrustDataChoice unionChoice,
WinTrustDataStateAction stateAction,
WinTrustDataProvFlags provFlags,
WinTrustDataUIContext uiContext,
WINTRUST_FILE_INFO fileInfo)
{
this.UIChoice = (uint)uiChoice;
this.RevocationChecks = (uint)revocationCheck;
this.UnionChoice = (uint)unionChoice;
this.StateAction = (uint)stateAction;
this.ProvFlags = provFlags;
this.UIContext = (uint)uiContext;
ProvFlags |= WinTrustDataProvFlags.DisableMD2andMD4;
FileInfoPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(WINTRUST_FILE_INFO)));
Marshal.StructureToPtr(fileInfo, FileInfoPtr, false);
}
// constructor for silent WinTrustDataChoice.File check
internal WinTrustData(String fileName, WinTrustDataRevocationChecks checks)
{
var wtfiData = new WinTrustFileInfo(fileName);
FileInfoPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(WinTrustFileInfo)));
Marshal.StructureToPtr(wtfiData, FileInfoPtr, false);
RevocationChecks = checks;
}
///
/// Calls WinTrust.WinVerifyTrust() to check embedded file signature
///
/// absolute path and file name
/// validation to perform
/// enumeration
/// true if the signature is valid, otherwise false
public static bool VerifyEmbeddedSignature(string fileName, Guid guidAction, WinTrustDataRevocationChecks revocationChecks)
{
WinTrustData wtd = new WinTrustData(fileName, revocationChecks);
WinVerifyTrustResult result = WinVerifyTrust(INVALID_HANDLE_VALUE, guidAction, wtd);
return(result == WinVerifyTrustResult.Success);
}
