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Initial EVSA format support

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- better UI and parsing upcoming
- "storage" replaced with "store" everywhere
This commit is contained in:
Nikolaj Schlej 2016-04-07 08:23:37 +02:00
parent 40200bca12
commit 57e24c7465
12 changed files with 559 additions and 289 deletions
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107
common/nvram.h
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@ -20,11 +20,11 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include "basetypes.h"
//
// Let's start with NVAR storage, as the most difficult one
// NVAR store
//
// CEF5B9A3-476D-497F-9FDC-E98143E0422C
const QByteArray NVRAM_NVAR_STORAGE_FILE_GUID
const QByteArray NVRAM_NVAR_STORE_FILE_GUID
("\xA3\xB9\xF5\xCE\x6D\x47\x7F\x49\x9F\xDC\xE9\x81\x43\xE0\x42\x2C", 16);
// 9221315B-30BB-46B5-813E-1B1BF4712BD3
@ -65,13 +65,17 @@ typedef struct _NVAR_VARIABLE_HEADER {
#define NVRAM_NVAR_VARIABLE_EXT_ATTRIB_TIME_BASED 0x20
//
// Next format is TianoCore VSS and it's variations
// TianoCore VSS and it's variations
//
// FFF12B8D-7696-4C8B-A985-2747075B4F50
const QByteArray NVRAM_VSS_STORAGE_VOLUME_GUID
const QByteArray NVRAM_VSS_STORE_VOLUME_GUID
("\x8D\x2B\xF1\xFF\x96\x76\x8B\x4C\xA9\x85\x27\x47\x07\x5B\x4F\x50", 16);
// 00504624-8A59-4EEB-BD0F-6B36E96128E0
const QByteArray NVRAM_ADDITIONAL_STORE_VOLUME_GUID
("\x24\x46\x50\x00\x59\x8A\xEB\x4E\xBD\x0F\x6B\x36\xE9\x61\x28\xE0", 16);
#define NVRAM_VSS_STORE_SIGNATURE 0x53535624 // $VSS
#define NVRAM_APPLE_SVS_STORE_SIGNATURE 0x53565324 // $SVS
#define NVRAM_APPLE_FSYS_STORE_SIGNATURE 0x73797346 // Fsys
@ -90,29 +94,13 @@ const QByteArray NVRAM_VSS_STORAGE_VOLUME_GUID
// Variable store header
typedef struct _VSS_VARIABLE_STORE_HEADER {
UINT32 Signature; // $VSS signature
UINT32 Size; // Size of variable storage, including storage header
UINT8 Format; // Storage format state
UINT8 State; // Storage health state
UINT32 Size; // Size of variable store, including store header
UINT8 Format; // Store format state
UINT8 State; // Store health state
UINT16 Unknown; // Used in Apple $SVS varstores
UINT32 : 32;
} VSS_VARIABLE_STORE_HEADER;
// Apple Fsys store header
typedef struct _APPLE_FSYS_STORE_HEADER {
UINT32 Signature; // Fsys signature
UINT8 Unknown[5]; // Still unknown
UINT16 Size; // Size of variable storage
} APPLE_FSYS_STORE_HEADER;
// Apple Fsys variable format
// UINT8 NameLength;
// CHAR8 Name[];
// UINT16 DataLength;
// UINT8 Data[]
// Storage ends with a chunk named "EOF" without data
// All free bytes in storage are zeroed
// Has CRC32 of the whole store without checksum field at the end
// Normal variable header
typedef struct _VSS_VARIABLE_HEADER {
UINT16 StartId; // Variable start marker AA55
@ -170,17 +158,84 @@ typedef struct _VSS_AUTH_VARIABLE_HEADER {
// FDC region can be found in some VSS volumes
// It has another VSS volume inside
// _FDC header structure
#define NVRAM_FDC_VOLUME_SIGNATURE 0x4344465F
typedef struct _FDC_VOLUME_HEADER {
UINT32 Signature;
UINT32 Signature; //_FDC
UINT32 Size;
//EFI_FIRMWARE_VOLUME_HEADER VolumeHeader;
//EFI_FV_BLOCK_MAP_ENTRY FvBlockMap[2];
//VSS_VARIABLE_STORE_HEADER VssHeader;
} FDC_VOLUME_HEADER;
#define NVRAM_FDC_VOLUME_SIGNATURE 0x4344465F
//
// Apple Fsys
//
typedef struct _APPLE_FSYS_STORE_HEADER {
UINT32 Signature; // Fsys signature
UINT8 Unknown[5]; // Still unknown
UINT16 Size; // Size of variable store
} APPLE_FSYS_STORE_HEADER;
// Apple Fsys variable format
// UINT8 NameLength;
// CHAR8 Name[];
// UINT16 DataLength;
// UINT8 Data[]
// Store ends with a chunk named "EOF" without data
// All free bytes in store are zeroed
// Has CRC32 of the whole store without checksum field at the end
//
// EVSA
//
#define NVRAM_EVSA_STORE_SIGNATURE 0x41535645
#define NVRAM_EVSA_ENTRY_TYPE_STORE 0xEC
#define NVRAM_EVSA_ENTRY_TYPE_GUID1 0xED
#define NVRAM_EVSA_ENTRY_TYPE_GUID2 0xE1
#define NVRAM_EVSA_ENTRY_TYPE_NAME1 0xEE
#define NVRAM_EVSA_ENTRY_TYPE_NAME2 0xE2
#define NVRAM_EVSA_ENTRY_TYPE_DATA1 0xEF
#define NVRAM_EVSA_ENTRY_TYPE_DATA2 0xE3
#define NVRAM_EVSA_ENTRY_TYPE_DATA3 0x83
typedef struct _EVSA_ENTRY_HEADER {
UINT8 Type;
UINT8 Checksum;
UINT16 Size;
} EVSA_ENTRY_HEADER;
typedef struct _EVSA_STORE_ENTRY {
EVSA_ENTRY_HEADER Header;
UINT32 Signature; // EVSA
UINT32 Attributes;
UINT32 StoreSize;
UINT32 : 32;
} EVSA_STORE_ENTRY;
typedef struct _EVSA_GUID_ENTRY {
EVSA_ENTRY_HEADER Header;
UINT16 GuidId;
EFI_GUID Guid;
} EVSA_GUID_ENTRY;
typedef struct _EVSA_NAME_ENTRY {
EVSA_ENTRY_HEADER Header;
UINT16 VarId;
//CHAR16 Name[];
} EVSA_NAME_ENTRY;
typedef struct _EVSA_DATA_ENTRY {
EVSA_ENTRY_HEADER Header;
UINT16 GuidId;
UINT16 VarId;
UINT32 Attributes;
//UINT8 Data[];
} EVSA_DATA_ENTRY;
// Restore previous packing rules
#pragma pack(pop)
#endif