private static readonly byte[] MscfSignature = new byte[] { 0x4d, 0x53, 0x43, 0x46 }; // M, S, C, F
private static UpdatePackageType DetectUpdatePackageType(string updatePackageFilePath)
{
var signature = FileSignatureHelper.ReadFileSignature(updatePackageFilePath);
if (FileSignatureHelper.CompareFileSignature(MscfSignature, signature.AsSpan(0, MscfSignature.Length)))
{
return(UpdatePackageType.MSCF);
}
return(UpdatePackageType.Unknown);
}
private static readonly byte[] XmlFileSignature = new byte[] { 0x3c, 0x3f, 0x78, 0x6d, 0x6c, 0x20 }; // <?xml
private static UpdateModuleFileType DetectUpdateModuleFileType(string updateModuleFilePath)
{
var signature = FileSignatureHelper.ReadFileSignature(updateModuleFilePath);
if (FileSignatureHelper.CompareFileSignature(ExecutableFileSignature, signature.AsSpan(0, ExecutableFileSignature.Length)))
{
return(UpdateModuleFileType.Executable);
}
else if (FileSignatureHelper.CompareFileSignature(XmlFileSignature, signature.AsSpan(0, XmlFileSignature.Length)))
{
return(UpdateModuleFileType.Xml);
}
return(UpdateModuleFileType.Other);
}