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Dump Windows ProductPolicy Structure in C#
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// dump ProductPolicy data structure from Windows | |
// ref: https://www.geoffchappell.com/studies/windows/km/ntoskrnl/api/ex/slmem/productpolicy.htm | |
using (var pok = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SYSTEM\ControlSet001\Control\ProductOptions", false)) | |
{ | |
byte[] policy = (byte[])pok.GetValue(@"ProductPolicy"); | |
using (var ms = new MemoryStream(policy)) | |
using (var br = new BinaryReader(ms)) | |
{ | |
Console.WriteLine("total license data size (including header): {0}", br.ReadUInt32()); | |
Console.WriteLine("size of all entries: {0}", br.ReadUInt32()); | |
Console.WriteLine("size of of ending marker: {0}", br.ReadUInt32()); | |
Console.WriteLine("unknown: {0}", br.ReadUInt32()); | |
Console.WriteLine("license data version: {0}", br.ReadUInt32()); | |
Console.WriteLine(); | |
while (ms.Position < ms.Length) | |
{ | |
var entryPos = ms.Position; | |
var entrySize = br.ReadUInt16(); | |
Console.WriteLine("entry offset: 0x{0:X8}", ms.Position); | |
Console.WriteLine("total size of entry: {0}", entrySize); | |
ushort sizeOfName = br.ReadUInt16(); | |
if (entrySize == 69 /* nice */ && sizeOfName == 0) | |
{ | |
Console.WriteLine(); | |
Console.WriteLine("No more entries."); | |
break; | |
} | |
Console.WriteLine("size of name: {0}", sizeOfName); | |
var dataType = br.ReadUInt16(); | |
Console.WriteLine("type of data: {0}", dataType); | |
ushort sizeOfData = br.ReadUInt16(); | |
Console.WriteLine("size of data: {0}", sizeOfData); | |
Console.WriteLine("flags: {0}", br.ReadUInt32()); | |
Console.WriteLine("unknown: {0}", br.ReadUInt32()); | |
Console.WriteLine("name offset: 0x{0:X8}", ms.Position); | |
var nameBytes = br.ReadBytes(sizeOfName); | |
Console.WriteLine("name: {0}", Encoding.Unicode.GetString(nameBytes, 0, nameBytes.Length)); | |
Console.WriteLine("data offset: 0x{0:X8}", ms.Position); | |
var dataBytes = br.ReadBytes(sizeOfData); | |
if (dataType == 4) | |
{ | |
Console.WriteLine("value: {0}", BitConverter.ToUInt32(dataBytes, 0)); | |
} | |
ms.Seek(entryPos + entrySize, SeekOrigin.Begin); | |
Console.WriteLine(); | |
} | |
} | |
} |
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