PKG files

See also Discussion page

Firmware Packages

File Header

All values are in big endian format.

 typedef struct {
   u32 0x00, 0x53434500// magic
   u32 0x04, 2		// version
   u16 0x08, 0		// sdk type?
   u16 0x0a, 3		// SCE header type; pkg
   u32 0x0c, 0		// meta offset
   u64 0x10,           // size of sce_hdr + sizeof meta_hdr
   u64 0x18, 0x80      // + content_size_real
 }

Game Packages

All game packages are signed with the ECDSA signature. The public key for it can be found in download_plugin.prx or in nas_plugin.prx (this also applies to NPDRM SELFs). Usually game packages are signed with two signatures - one for the header and the other for the entry table.

File Header

Example from a retail PS3 .pkg

• Example: Scott Pilgrim VS. The World Unlock .pkg file:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00000000  7F 50 4B 47 80 00 00 01 00 00 00 C0 00 00 00 08  .PKGЂ......А....
00000010  00 00 00 C0 00 00 00 02 00 00 00 00 00 00 17 C0  ...А...........А
00000020  00 00 00 00 00 00 01 80 00 00 00 00 00 00 15 E0  .......Ђ.......а
00000030  55 50 30 30 30 31 2D 4E 50 55 42 33 30 31 36 32  UP0001-NPUB30162
00000040  5F 30 30 2D 53 43 4F 54 54 50 49 4C 47 52 49 4D  _00-SCOTTPILGRIM
00000050  30 30 30 32 00 00 00 00 00 00 00 00 00 00 00 00  0002............
00000060  09 8B A2 CA 2D 30 30 1F 8B 5B 82 79 C6 70 35 F3  .‹ўК-00.‹[‚yЖp5у
00000070  D5 FA 15 9E 7F AC 82 70 BB 3E 0C EB 97 3D 30 11  Хъ.ћ.¬‚p»>.л—=0.
00000080  48 0D 86 60 9F 26 8E 7F 4F B4 DA A4 33 1E 9A A1  H.†`џ&Ћ.OґЪ¤3.љЎ
00000090  0C 85 45 95 A8 D4 A3 9B 62 44 68 C1 38 CE D7 63  .…E•ЁФЈ›bDhБ8ОЧc
000000A0  0D FF 0C C5 3A 77 C6 E6 E4 62 AD 05 F3 93 D0 7A  .я.Е:wЖждb..у“Рz
000000B0  CC 02 B4 35 2B 70 47 D6 EC 61 40 39 A6 5B DC BD  М.ґ5+pGЦмa@9¦[ЬЅ

PKG header

Name	Offset	Size	Example	Remark
magic	0x00	0x04	7F 50 4B 47	'.PKG'
pkg_revision	0x04	0x02	80 00	80 00 for retail (finalized), 00 00 for debug (non finalized)
pkg_type	0x06	0x02	00 01	00 01 for PS3, 00 02 for PSP and PSVita
pkg_metadata_offset	0x08	0x04	00 00 00 C0	0xC0, usually 0x280 for PSP and PSVita
pkg_metadata_count	0x0C	0x04	00 00 00 08	item count
pkg_metadata_size	0x10	0x04	00 00 00 C0	usually 0xC0 for PSP and PS3, usually 0x160 for PSVita
item_count	0x14	0x04	00 00 00 02	files and folders into the encrypted data
total_size	0x18	0x08	00 00 00 00 00 00 17 C0	0x17C0 - total pkg file size
data_offset	0x20	0x08	00 00 00 00 00 00 01 80	0x0180 - encrypted data offset
data_size	0x28	0x08	00 00 00 00 00 00 15 E0	0x15E0 - encrypted data size
contentid	0x30	0x24	"UP0001-NPUB30162_00-SCOTTPILGRIM0002"	PKG Content ID
padding	0x54	0x0C	00 00 00 00 00 00 00 00 00 00 00 00	0x0C bytes padding
digest	0x60	0x10	09 8B A2 CA 2D 30 30 1F 8B 5B 82 79 C6 70 35 F3	sha1 from debug files and attributes together merged in one block
pkg_data_riv	0x70	0x10	D5 FA 15 9E 7F AC 82 70 BB 3E 0C EB 97 3D 30 11	aes-128-ctr iv. Used with gpkg_key to decrypt data.
header_cmac_hash	0x80	0x10	48 0D 86 60 9F 26 8E 7F 4F B4 DA A4 33 1E 9A A1	CMAC OMAC hash from 0x00-0x7F. PS3 gpkg_key used as key.
header_npdrm_signature	0x90	0x28		PKG header NPDRM ECDSA (R_sig, S_sig)
header_sha1_hash	0xB8	0x08	EC 61 40 39 A6 5B DC BD	last 8 bytes of sha1 hash of 0x00-0x7F

All values are in big endian format.

 typedef struct {
   u32 magic;
   u16 pkg_revision;
   u16 pkg_type;
   u32 pkg_metadata_offset;
   u32 pkg_metadata_count;
   u32 pkg_metadata_size;
   u32 item_count;
   u64 total_size;
   u64 data_offset;
   u64 data_size;
   u8 contentid[0x30];
   u8 digest[0x10];
   u8 pkg_data_riv[0x10];
   u8 header_cmac_hash[0x10];
   u8 header_npdrm_signature[0x28];
   u8 header_sha1_hash[0x8];
 } PKG_HEADER;

PKG metadata

 typedef struct {
  union{
   u32 packet_identifier; // 0-0x12
   u32 data_size;
   {
    data
   }
  } ...
  // u8 padding[variable];
  u8 unknown[0x40];
 } PKG_METADATA;

Identifier	category name	Possible size	Possible values
0x00000001	DRM Type	4	0/5/6/7/8/9/0xA/0xB/0xC (unknown), 0x1 (network), 0x2 (local), 0x3 (DRMfree no license), 0x4 (PSP), 0xD (DRMfree with license), 0xE (PSM)
0x00000002	Content Type	4	00 00 00 07
0x00000003	Package Type / Storage Type / Package Flags	4	Upgradeable, Patch, NonGame, HDDGamePatch, DiscGamePatch, RenameDirectory, ForcedInstallTo, Finalized
0x00000004	Package Size	8	00 00 00 00 0E 77 40 00
0x00000005	make_package_npdrm reversion (2 bytes) + Package version (2 bytes)	4	09 60 00 00 (0.960, 0.00), 12 12 00 00 (1.212, 0.00), 12 73 01 01 (1.273, 1.01), 19 53 01 00 (1.953, 1.00), 19 63 01 00, 19 66 01 00, 19 72 01 02 (1.972, 1.02)
0x00000006	Version + App Version / TitleID (on size 0xC)	0xC	"NPEG00005\0\0\0"
0x00000007	QA Digest	0x18	00 00 00 00 00 00 00 00 B5 76 E1 D9 00 EE 9B BC 8E 24 17 91 5D BC 5A CB
0x00000008	PS3/PSP/PSP2 System Version, Package version, App Version	8	00 00 00 00 00 00 00 00, 00 00 00 00 01 00 01 00, 44 01 70 00 01 01 00 00, 81 04 75 00 01 02 01 00
0x00000009	unk	8	either 00 00 00 00 00 00 00 00 or 00 00 00 00 00 24 00 00
0x0000000A	unk
0x0000000B	unk
0x0000000C	unk
0x0000000D	?ECDSA sig (or hash)?	0x28	always 6 zeroed chars at the beginning 00 00 00 00 00 00 05 A0 18 8B B1 8A E5 E8 40 FD EE 71 E2 27 60 55 E6 39 06 94 5B 65 89 04 B2 88 61 DA BB A3 B2 55 C5 C1
0x0000000E	PARAM_SFO_info	0x38	00 00 0C 10 00 00 05 0C 00 00 00 14 01 67 00 00 00 00 00 00 00 00 00 00 FC 3D 1E 32 FA F7 A6 11 90 46 A6 34 BE 98 9A 78 65 A8 92 25 3C 49 D7 69 73 53 32 E7 8E 06 1E 60
0x0000000F	unknown_data0_info	0x48	00 00 05 60 00 00 03 20 00 00 00 00 00 00 00 00 00 00 00 00 01 01 01 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 0F 26 BD 5C 2F 13 95 EB 16 E6 62 07 8D 9A E3 DC 0B AC 25 11 1C 19 39 B9 40 06 4E 82 AF 1E C3 00 00 06 10 00 00 03 20 00 00 01 F4 00 00 01 F7 00 00 00 00 01 01 01 01 A5 74 D5 71 00 03 00 01 00 00 00 00 00 00 00 00 79 52 B2 3F 78 3B 9D F4 C0 BB 26 C0 EC 14 1B 37 8B 9B 69 71 1C 22 C3 49 57 97 B6 DE 78 0A D0 00
0x00000010	unknown_data1_info	0x38	00 00 0A 00 00 00 00 A0 D3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 4D AD EB 44 67 51 C1 2D 69 95 46 8C 82 A9 3D 74 AD F4 62 49 90 BD EE F0 75 97 A3 B6 5B 17 48 00 00 0A B0 00 00 01 60 FF D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 D2 7F 9E EF 38 F7 61 6E C1 C5 CC B1 E1 83 12 0C 6F 38 4C 8C 22 84 8B A4 3B 7B 47 57 77 C9 F9 C9
0x00000011	unk	0x28	01 60 00 00 00 06 23 47 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 07 00 00 00 07 60 74 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000012	unknown_data2_info	0x38	00 00 11 20 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 CF 74 D5 30 04 99 F0 57 E8 65 20 5C 3D 71 12 36 F1 E4 EF BC 98 EA 52 F1 F0 60 E8 7C 8A 53 B8 A4

ContentType

content type	type name	install path (on ps3)	notes
0x00000001
0x00000002
0x00000003
0x00000004	GameData (also patches)	/dev_hdd0/game/
0x00000005	GameExec	/dev_hdd0/game/
0x00000006	PS1emu	/dev_hdd0/game/
0x00000007	PSP & PCEngine	/dev_hdd0/game/
0x00000008
0x00000009	Theme	/dev_hdd0/theme
0x0000000A	Widget	/dev_hdd0/widget
0x0000000B	License	/dev_hdd0/home/<current user>/exdata
0x0000000C	VSH Module	/dev_hdd0/vsh/modules/
0x0000000D	PSN Avatar	/dev_hdd0/home/<current user>/psn_avatar
0x0000000E	PSPgo	/dev_hdd0/game/	Displayed as Unknown Album: Corrupted Data
0x0000000F	Minis	/dev_hdd0/game/
0x00000010	NEOGEO	/dev_hdd0/game/
0x00000011	VMC	/dev_hdd0/tmp/vmc/
0x00000012	Seen on PS2 classic	/dev_hdd0/game/
0x00000013
0x00000014	Seen on PSP remastered	/dev_hdd0/game/
0x00000015	PSVita Game Data (PSP2GD)
0x00000016	PSVita Additional Content (PSP2AC)
0x00000017	PSVita LiveArea (PSP2LA)
0x00000018	PSVita PSM
0x00000019	WT (Web TV?)	/dev_hdd0/game/
0x0000001D	PSVita PSM
0x0000001F	PSVita Theme

PARAM_SFO_info

 typedef struct { // size is 0x38
   u32 sfo_offset;
   u16 sfo_size;
   u32 unk_int; // ex: 0x14, 0x4, 0x9
   u32 PSP2_DISP_VER;
   u8 unk[0x8];
   u8 sfo_sha256[0x20];
 } PARAM_SFO_info;

unknown_data0_info

 typedef struct { // size is 0x48
   u32 unknown_data_offset;
   u16 unknown_data_size; // ex: 0x320
   u8 unk[0x20];
   u8 unknown_data_sha256[0x20];
 } unknown_data0_info;

unknown_data1_info

 typedef struct { // size is 0x38
   u32 unknown_data_offset; // located just before SFO
   u16 unknown_data_size; // ex: 0x160
   u8 unk[0x10];
   u8 unknown_data_sha256[0x20];
 } unknown_data1_info;

unknown_data2_info

 typedef struct { // size is 0x38
   u32 unknown_data_offset;
   u16 unknown_data_size; // usually 0x10
   u8 unk[0x10];
   u8 unknown_data_sha256[0x20];
 } unknown_data2_info;

File Entry

All values are in big endian format.

 typedef struct {
   u32 filename_offset;
   u32 filename_size;
   u64 data_offset;
   u64 data_size;
   u32 flags;
   u32 padding;
 } PKG_FILE_HEADER;

field	offset	type	notes
filename_offset	0x0	u32
filename_size	0x4	u32
data_offset	0x8	u64
data_size	0x10	u64
flags	0x18	u32	The file type
padding	0x1C	u32	zero

Misc/Note

From FW 4.00, install PKG from root device (but not as "bubble") for PS1 classic if not containing .EDAT files license type Free will abort or install directly as bubble according to the cfw.

File Footer

The last 0x20 bytes of the package contains a hash (sha1sum) of the package (sha1 of the whole file minus the last 0x20 bytes). Or in other words... to verify the integrity of a package is needed to crop the 0x20 bytes at the end, then calculate the sha1 of the resulting file, then compare with the sha1 that was cropped

Is also used as part of the package identification info inside the TITLE_ID-ver.xml files in PSN servers that lists the available game patches for each game. See: Game Updating Procedure page and the sha1sum in the .xml examples

• Notes
  • This footer area is considered part of the package and is included when counting the total_size of the package (in the header at offset 0x18), and the header is hashed too by header_sha1_hash (at offset 0xB8), this is important in the sequence of actions needed when building the package and updating/adding the sha1 footer at the end
  • Homebrew packages (at least some of them) doesnt includes this footer

Package links

• sqlite3 db of .pkg files (pkg links, file infos, signatures, etc): pkg_harvester_db.7z 6.7 MB (includes PS3, PSP) - uncompressed pkg_harvester.db: 24.5 MB

several constants used in pkg_harvester.db:

enum class ProductEnvironment
{
	kUnknown = 0,
	kNP      = 1,
	kPQA     = 2,
	kPMGMT   = 3,
	kSPINT   = 4,
};

enum class PackageType
{
	kUnknown = 0,
	kPS3     = 1,
	kPSP     = 2,
};

enum class FileType
{
	kUnknown = 0,
	kSelf    = 1,
	kSprx    = 2,
	kEdata   = 3,
	kSdata   = 4,
};

enum class DRMLicenseType
{
	kUnknown = 0,
	kNetwork = 1,
	kLocal   = 2,
	kFree    = 3,
};