Envelope Files

Envelope files are a general purpose container format for encrypting and signing a message. This format was likely introduced in FW 3.00 (>2.56 <=3.50).

Messages are encrypted using AES128 in CBC mode, and signed using a public key.

Format

Fields are little-endian.

Name	Offset	Size	Example	Remark
Signature	0x000	4	CC CB 73 51	Four bytes, not an int
Version	0x004	4	00 00 00 00	Only version 0 (zero) exists
Content ID	0x008	4	01 00 00 00	See Content
Unknown	0x00C	4	00 00 00 00	Always 0
Message Size	0x010	8	83 03 00 00 00 00 00 00	Size of the message in bytes.
Unknown	0x018	8	00 00 00 00 00 00 00 00	Always 0
Message IV	0x020	16		IV for encrypted message
Message Hash	0x030	32		SHA256 hash of unencrypted message bytes
File Signature	0x050	128		Verified using public key
Message Data	0x150	Message Size		Encrypted message bytes. Encryption key and public key varies with content ID

Content

The underlying unencrypted message format varies between different content.

ID	Name	Description	Files/URLs	Remarks
1	beta_updatelist	Beta Update List	https://fus01.ps4.update.playstation.net/update/ps4/beta/list/us/ps4-updatelist_?.xml	Password "?" in URL varies with system version
2	timezone	Timezone	/system_data/priv/settings_app/timezone.dat.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/timezone/np/v00/timezone.dat.env
3	system_log_config	System Log Config	/system/priv/system_log_ro/config/*.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/sl-config/np/v07/sl-config.xml.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/sl-config-dev/np/v07/sl-config-dev.xml.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/sl-config-dev/np/v06/sl-config-dev.xml.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/sl-config-kamaji/np/v01/sl-config-kamaji.xml.env	Version in URL varies with system version
4	system_log_unknown
5	bgdc	Background Daily Checker	http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgdc/np/v00/bgdc-config.xml.env
6	wctl	Title Workaround Control	/mnt/disc/PS4/WCTL/wctl-config.env /system_data/priv/workaround_ctl/title_workaround.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/wctl/np/v00/wctl-config.env
7	morpheus_updatelist	Morpheus (VR) Update List	https://f01.vrs.update.playstation.net/update/vrs/list/vrs-updatelist-utDCG9ywva92MlS0rXGRUJCjpDtsw38V.xml
8	netev		/system_data/priv/netev/netev-config.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/netev/np/v00/netev-config.env
10	hid_config		/system/priv/hid_config_service_ro/hid_config.env /system_data/priv/hid_config_service/hid_config.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/hid_config/np/v00/hid_config.env
12	hidusbpower		/system/priv/hid_config_service_ro/hidusbpower.env /system_data/priv/hid_config_service/hidusbpower.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/hidusbpower/np/v00/hidusbpower.env	Added >3.70 <=4.05
13	patch
14	bgft	Background File Transfer	http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgft/np/v00/bgft.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgft/np/v01/bgft.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgft/np/v02/bgft.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgft/np/v03/bgft.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgft/np/v04/bgft.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgft/np/v05/bgft.env http://ps4-system.sec.np.dl.playstation.net/ps4-system/bgft/np/v06/bgft.env	Version in URL varies with system version
17	system_log_privacy		/system/priv/system_log_ro/platform_privacy/*.env	Added 5.00
19	entitlementmgr_config		https://ps4-system.sec.np.dl.playstation.net/ps4-system/entitlementmgr/np/v00/entitlementmgr_config.env	Added >5.05 <=7.00