NVAR parsing support

- still no proper menus for data extraction
- other NVRAM formats TBD

common/nvram.h

@@ -0,0 +1,64 @@
+/* nvram.h
+
+Copyright (c) 2016, Nikolaj Schlej. All rights reserved.
+
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+*/
+
+#ifndef __NVRAM_H__
+#define __NVRAM_H__
+
+#include <QByteArray>
+#include <QString>
+#include "basetypes.h"
+
+//
+// Let's start with NVAR storage, as the most difficult one
+//
+
+//CEF5B9A3-476D-497F-9FDC-E98143E0422C
+const QByteArray NVRAM_NVAR_FILE_GUID
+("\xA3\xB9\xF5\xCE\x6D\x47\x7F\x49\x9F\xDC\xE9\x81\x43\xE0\x42\x2C", 16);
+
+extern QString variableAttributesToQstring(UINT8 attributes);
+
+// Make sure we use right packing rules
+#pragma pack(push,1)
+
+// Variable header
+typedef struct _NVAR_VARIABLE_HEADER {
+    UINT32 Signature;      // NVAR signature
+    UINT16 Size;           // Size of the variable including header
+    UINT32 Next : 24;      // Offset to the next variable in a list, or empty if latest in the list
+    UINT32 Attributes : 8; // Attributes
+} NVAR_VARIABLE_HEADER;
+
+// NVAR signature
+#define NVRAM_NVAR_VARIABLE_SIGNATURE         0x5241564E
+
+// Attributes
+#define NVRAM_NVAR_VARIABLE_ATTRIB_RUNTIME         0x01
+#define NVRAM_NVAR_VARIABLE_ATTRIB_ASCII_NAME      0x02
+#define NVRAM_NVAR_VARIABLE_ATTRIB_GUID            0x04
+#define NVRAM_NVAR_VARIABLE_ATTRIB_DATA_ONLY       0x08
+#define NVRAM_NVAR_VARIABLE_ATTRIB_EXT_HEADER      0x10
+#define NVRAM_NVAR_VARIABLE_ATTRIB_HW_ERROR_RECORD 0x20 
+#define NVRAM_NVAR_VARIABLE_ATTRIB_AUTH_WRITE      0x40
+#define NVRAM_NVAR_VARIABLE_ATTRIB_VALID           0x80
+
+// Extended attributes
+#define NVRAM_NVAR_VARIABLE_EXT_ATTRIB_CHECKSUM    0x01
+#define NVRAM_NVAR_VARIABLE_EXT_ATTRIB_AUTH_WRITE  0x10
+#define NVRAM_NVAR_VARIABLE_EXT_ATTRIB_TIME_BASED  0x20
+
+// Restore previous packing rules
+#pragma pack(pop)
+
+#endif