EDAT files

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Decryption of EDATS

Three ways to do it:

• act.dat,rif,idps combo
• rap
• free content (npdrm1 klic)

Free Content

Simply decrypted with appldr keys and free klic

Using RAP

Overview of steps:

• Obtain rifkey from rap (flatz's rap2rifkey)
• Decrypt EDAT using corresponding klic (minis,psxclassics,etc) and rifkey

Structure (Encrypted Format)

	Offset	Name	Size	Type	Note
Header
	0x00	magic	4	uint32	"NPD" (4E 50 44 00)
	0x04	version	4	uint32	01 02 03 04
	0x08	License Types	4	uint32	for PS2 edat, the FW requires it to be with activation (also a.k.a. Paid content paired with your individual data) for PS1 PKG, the FW 4.00 introduced some changes for installing them with regard to the EDAT license type. 00 Debug / SDAT 01 Network License: requires network authentication every time . See inability example 02 Local License: requires first time activation on-line (paid content but also demo & free of charge content). 03 Free License: without license check.
	0x0C	Application Type	4	uint32	00 01 (only theme/avatar/activation key, come with only PS3LOGO.DAT. PKG items count is 0x02) and PS2 EDAT (Iso.bin.edat) 20 Disc Bind (regular, psp hd remasters) 21 Disc Bind (modules) 30 unknown (Ridge Racer 7 Update)
	0x10	CONTENT ID	48 (0x30)	uint8	Content ID
	0x40	Digest	16 (0x10)	uint8	QA digest (seems like to be a SHA-1 hash of the non-finalized file) : hash of the original data which is unknown until the whole file is read, can not be used as check. Can be used as watermark or zeroed on forged file.
	0x50	NPD hash 1	16 (0x10)	uint8	CID-FN hash (an AES CMAC hash of concatenation of Content ID and File Name using the third NPDRM OMAC key as CMAC key)
	0x60	NPD hash 2	16 (0x10)	uint8	header hash (an AES CMAC hash of the 0x60 bytes from the beginning of file using xored bytes of the developer's klicensee and the second NPDRM OMAC key as CMAC key)
	0x70	Activation time	8	unkn	Start of the validity period, filled with 00 if not used.
	0x78	Activation time	8	unkn	End of the validity period, filled with 00 if not used.
	0x80	NPD type	1	uint8	(Separated from Metadata type for wiki format) 00 Finalized EDAT 01 Finalized SDAT 80 Non Finalized EDAT 81 Non Finalized SDAT
	0x81	Metadata type	3	uint8	(Outdated Flags description from talk page) 00 01 Compressed? 02 Plain text? 03 Compressed plain text? 05 Compressed? 06 Plain text? 07 Compressed plain text? 0C ? 0D Compressed data? 3C data/misc?
	0x84	Segment size	4	uint8	Default block is 16 KB (16384 bytes) = 0x4000, max is 0x8000.
	0x88	Data size	8	uint8	decoded data size
	0x90	meta data sections hash	16 (0x10)
	0xA0	extended header hash	16 (0x10)		An AES CMAC hash of 160 bytes from the beginning of file) uses the hash key as CMAC key and it depends on the file flags and keys
	0xB0	ECDSA Metadata signature	40 (0x28)		Can be zeroed on forged file. curve_type is vsh type 0x02, pub is vsh public key,
	0xD8	ECDSA Header signature	40 (0x28)		Enabled (only?) for PS2 classic: all custom firmwares are patched to skip the ECDSA check. Can be zeroed on forged file. curve_type is vsh type 0x02, pub is vsh public key.
Body
	0x100	Encrypted file	Variable		The file is encrypted using an AES algorithm in CBC mode.
	0x**	Padding	Variable

Footer Structure (Encrypted Format)

Description	Size	Note
Name	5	"EDATA" or "SDATA"
Space	1	0x20
Tool Version	8	Version 1: "packager" Version 2: "2.4.0.L " Version 2: "2.4.0.W " Version 2: "2.7.0.L " Version 3: "3.1.0.W " Version 3: "3.3.0.L " Version 3: "3.3.0.W " Version 4: "4.0.0.L " Version 4: "4.0.0.W "
End of the file	2	00 00

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Note: Applied for normal ps3 edats and minis.edat