static bool IsDotNetCoreBundle(string filename)
{
if (!PortableExecutableFileHelpers.IsPE(filename, out bool isExe, out bool hasDotNetMetadata))
{
return(false);
}
if (!isExe || hasDotNetMetadata)
{
return(false);
}
try {
using (var stream = File.OpenRead(filename)) {
if (stream.Length < bundleSig.Length)
{
return(false);
}
stream.Position = stream.Length - bundleSig.Length;
var sig = new byte[bundleSig.Length];
stream.Read(sig, 0, sig.Length);
for (int i = 0; i < sig.Length; i++)
{
if (bundleSig[i] != sig[i])
{
return(false);
}
}
return(true);
}
}
catch {
}
return(false);
}
internal static bool IsDotNetCoreAppHostFilename(string filename)
{
if (!File.Exists(filename))
{
return(false);
}
// We detect the apphost.exe like so:
// - must have an exe extension
// - must be a PE file and an EXE (DLL bit cleared)
// - must not have .NET metadata
// - must have a file with the same name but a dll extension
// - this dll file must be a PE file and have .NET metadata
if (!StringComparer.OrdinalIgnoreCase.Equals(Path.GetExtension(filename), ".exe"))
{
return(false);
}
var dllFilename = Path.ChangeExtension(filename, "dll");
if (!File.Exists(dllFilename))
{
return(false);
}
if (!PortableExecutableFileHelpers.IsPE(filename, out bool isExe, out bool hasDotNetMetadata))
{
return(false);
}
if (!isExe || hasDotNetMetadata)
{
return(false);
}
if (!PortableExecutableFileHelpers.IsPE(dllFilename, out _, out hasDotNetMetadata))
{
return(false);
}
if (!hasDotNetMetadata)
{
return(false);
}
return(true);
}
