1 files changed, 92 insertions, 0 deletions
diff --git a/contrib/uuid/gen_uuid_nt.c b/contrib/uuid/gen_uuid_nt.c
new file mode 100644
index 00000000000..aa44bfd3d7d
--- /dev/null
+++ b/contrib/uuid/gen_uuid_nt.c
@@ -0,0 +1,92 @@
+/*
+ * gen_uuid_nt.c -- Use NT api to generate uuid
+ *
+ * Written by Andrey Shedel (andreys@ns.cr.cyco.com)
+ */
+
+
+#include "uuidP.h"
+
+#pragma warning(push,4)
+
+#pragma comment(lib, "ntdll.lib")
+
+//
+// Here is a nice example why it's not a good idea
+// to use native API in ordinary applications.
+// Number of parameters in function below was changed from 3 to 4
+// for NT5.
+//
+//
+// NTSYSAPI
+// NTSTATUS
+// NTAPI
+// NtAllocateUuids(
+//     OUT PULONG p1,
+//     OUT PULONG p2,
+//     OUT PULONG p3,
+//     OUT PUCHAR Seed // 6 bytes
+//   );
+//
+//
+
+unsigned long
+__stdcall
+NtAllocateUuids(
+   void* p1,  // 8 bytes
+   void* p2,  // 4 bytes
+   void* p3   // 4 bytes
+   );
+
+typedef
+unsigned long
+(__stdcall*
+NtAllocateUuids_2000)(
+   void* p1,  // 8 bytes
+   void* p2,  // 4 bytes
+   void* p3,  // 4 bytes
+   void* seed // 6 bytes
+   );
+
+
+
+//
+// Nice, but instead of including ntddk.h ot winnt.h
+// I should define it here because they MISSED __stdcall in those headers.
+//
+
+__declspec(dllimport)
+struct _TEB*
+__stdcall
+NtCurrentTeb(void);
+
+
+//
+// The only way to get version information from the system is to examine
+// one stored in PEB. But it's pretty dangerouse because this value could
+// be altered in image header.
+//
+
+static
+int
+Nt5(void)
+{
+	//return NtCuttentTeb()->Peb->OSMajorVersion >= 5;
+	return (int)*(int*)((char*)(int)(*(int*)((char*)NtCurrentTeb() + 0x30)) + 0xA4) >= 5;
+}
+
+
+
+
+void uuid_generate(uuid_t out)
+{
+	if(Nt5())
+	{
+		unsigned char seed[6];
+		((NtAllocateUuids_2000)NtAllocateUuids)(out, ((char*)out)+8, ((char*)out)+12, &seed[0] );
+	}
+	else
+	{
+		NtAllocateUuids(out, ((char*)out)+8, ((char*)out)+12);
+	}
+}