PKG files

File Header

All values are in big endian format.

 typedef struct {
   u32 magic;
   u32 pkg_type;
   u32 pkg_info_offset;
   u32 unknown3;
   u32 header_size;
   u32 item_count;
   u64 total_size;
   u64 data_offset;
   u64 data_size;
   char contentid[0x30];
   u8 digest[0x10];
   u8 k_licensee[0x10];
 } PKG_HEADER;

field	offset	type	notes
Unencrypted header
magic	0x0	u32	Magic value of 0x7f504b47 "\x7fPKG"
pkg_type	0x4	u32	The package type is 1 for PS3 pkg and 2 for PSP packages. the flag 0x80000000 is used for retail.
pkg_info_offset	0x8	u32	offset of the pkg_info structure
unknown	0xC	u32	unknown
header_size	0x10	u32	Size of the header
item_count	0x14	u32
total_size	0x18	u64
data_offset	0x20	u64
data_size	0x28	u64
contentid	0x30	u8[48]
digest	0x60	u8[16]
k_licensee	0x70	u8[16]

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