Editing PKG files
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The main portion of a PKG file is its signed and encrypted [[PFS]] image. It is encrypted with XTS-AES with a block size of 0x1000. The key is derived from the HMAC-SHA256 of the concatenation of "0x01 0x00 0x00 0x00" in and the EKPFS. The HMAC key is the "crypt seed" which is at offset 0x370 in the PFS itself. The tweak key is the first 16 bytes of the HMAC result, while the data key is the second 16 bytes. | The main portion of a PKG file is its signed and encrypted [[PFS]] image. It is encrypted with XTS-AES with a block size of 0x1000. The key is derived from the HMAC-SHA256 of the concatenation of "0x01 0x00 0x00 0x00" in and the EKPFS. The HMAC key is the "crypt seed" which is at offset 0x370 in the PFS itself. The tweak key is the first 16 bytes of the HMAC result, while the data key is the second 16 bytes. | ||
The PFS image in a PKG file is different from the decrypted image exposed by the system in <code>/mnt/sandbox/pfsmnt/CUSA00001-app0-nest/pfs_image.dat</code>. This | The PFS image in a PKG file is different from the decrypted image exposed by the system in <code>/mnt/sandbox/pfsmnt/CUSA00001-app0-nest/pfs_image.dat</code>. This image uses <code>dinode_s32</code>, the signed inode variant, which includes a 32-byte signature for every direct and indirect block. Additionally, the indirect block blocks also have a 32-byte signature for each block within. | ||
Inside the PFS image in a PKG is a single file: <code>pfs_image.dat</code> which is a special type of compressed PFS image with a <code>PFSC</code> header. Inside <code>pfs_image.dat</code> is where the actual game/theme/DLC data | Inside the PFS image in a PKG is a single file: <code>pfs_image.dat</code> which is a special type of compressed PFS image with a <code>PFSC</code> header. Inside <code>pfs_image.dat</code> is where the actual game/theme/DLC data lives. | ||
== Delivery == | == Delivery == | ||
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http://gs2.ww.prod.dl.playstation.net/gs2/acpkgo/prod/CUSA01501_00/1/f_a6fb07c75a9776ca2f71e557a98620318bf11378c69d812f147c9f0fe12ee1c6/f/EP9000-CUSA01501_00-0000000000000003.pkg | http://gs2.ww.prod.dl.playstation.net/gs2/acpkgo/prod/CUSA01501_00/1/f_a6fb07c75a9776ca2f71e557a98620318bf11378c69d812f147c9f0fe12ee1c6/f/EP9000-CUSA01501_00-0000000000000003.pkg | ||
'''Source:''' https://boerse.to/thema/datenbank-fuer-ps4-psn-links.1979635/ | |||
See also: [[Package Files/Raw List 1]], [[Package Files/Raw List 2]]. | |||
{{File Formats}} | {{File Formats}} | ||
<noinclude>[[Category:Main]]</noinclude> | <noinclude>[[Category:Main]]</noinclude> |