SD Filesystem - Revision history

Wwylele at 11:24, 15 November 2017

2017-11-15T10:24:42Z

← Older revision		Revision as of 13:24, 15 November 2017
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	* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted by 128 bit AES-CTR with console-unique [[AES\|keyslots]]. The keyslot is initialized by [[nand/private/movable.sed]].		* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted by 128 bit AES-CTR with console-unique [[AES\|keyslots]]. The keyslot is initialized by [[nand/private/movable.sed]].
	* The crypto IV/CTR for each file is generated as follows: take the UTF-16 path relative to sdmc/Nintendo 3DS/<ID0>/<ID1> (the path it self begins with "/") and hash it with SHA-256, including the null null-terminator. Then calculate CTR as CTRbyte[i] = Hashbyte[i] ^ Hashbyte[16+i] for i = 0 to 15.		* The crypto IV/CTR for each file is generated as follows: take the UTF-16 path relative to sdmc/Nintendo 3DS/<ID0>/<ID1> (the path it self begins with "/") and hash it with SHA-256, including the null null-terminator. Then calculate CTR as CTRbyte[i] = Hashbyte[i] ^ Hashbyte[16+i] for i = 0 to 15.
			* The base CTR is fixed for each file, therefore the CTR never changes after each write. Thus it is possible to obtain some cleartext by XORing one file(like newly created extdata) with a newer file, where the newer file overwrote zeros in the original file with non-zero data.
	* Files stored under [[Flash Filesystem\|nand/data/<ID0>]] also use the same keyslot, but it is only used for MACs.		* Files stored under [[Flash Filesystem\|nand/data/<ID0>]] also use the same keyslot, but it is only used for MACs.
	* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].		* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].

Wwylele: /* Overview */ Move encryption stuff from Extdata to general SD file

2017-11-15T10:23:32Z

Overview: Move encryption stuff from Extdata to general SD file

← Older revision		Revision as of 13:23, 15 November 2017
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	* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted with console-unique [[AES\|keyslots]], ~~files~~ stored under [[Flash Filesystem\|nand/data/<ID0>]] only ~~use these keyslots~~ for MACs~~. All CTR files under these directories use the keyslots initialized by [[nand/private/movable.sed]]~~.		* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted by 128 bit AES-CTR with console-unique [[AES\|keyslots]]. The keyslot is initialized by [[nand/private/movable.sed]].
			* The crypto IV/CTR for each file is generated as follows: take the UTF-16 path relative to sdmc/Nintendo 3DS/<ID0>/<ID1> (the path it self begins with "/") and hash it with SHA-256, including the null null-terminator. Then calculate CTR as CTRbyte[i] = Hashbyte[i] ^ Hashbyte[16+i] for i = 0 to 15.
			* Files stored under [[Flash Filesystem\|nand/data/<ID0>]] also use the same keyslot, but it is only used for MACs.
	* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].		* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].
	* ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:		* ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:

Platinum Lucario: A bit of info about the private folder on the root of the SD card, it needs more research though...

2017-08-11T19:56:29Z

A bit of info about the private folder on the root of the SD card, it needs more research though...

← Older revision		Revision as of 23:56, 11 August 2017
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	sdmc		sdmc
	├── DCIM		├── DCIM
	~~└──~~ Nintendo 3DS		├── Nintendo 3DS
	├── <ID0>		│ ├── <ID0>
	│ └── <ID1>		│ │ └── <ID1>
	│ ├── [[SD Savedata Backups\|backups]]		│ │ ├── [[SD Savedata Backups\|backups]]
	│ ├── [[Title Database\|dbs]]		│ │ ├── [[Title Database\|dbs]]
	│ ├── [[extdata]]		│ │ ├── [[extdata]]
	│ ├── [[Title Data Structure\|title]]		│ │ ├── [[Title Data Structure\|title]]
	│ └── [[DSiWare_Exports\|Nintendo DSiWare]]		│ │ └── [[DSiWare_Exports\|Nintendo DSiWare]]
	└── [[SD Filesystem#Private\|Private]]		│ └── [[SD Filesystem#Private\|Private]]
			└── [[SD Filesystem#Other Private Data\|private]]
			└── Nintendo 3DS
			└── app


	* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted with console-unique [[AES\|keyslots]], files stored under [[Flash Filesystem\|nand/data/<ID0>]] only use these keyslots for MACs. All CTR files under these directories use the keyslots initialized by [[nand/private/movable.sed]].		* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted with console-unique [[AES\|keyslots]], files stored under [[Flash Filesystem\|nand/data/<ID0>]] only use these keyslots for MACs. All CTR files under these directories use the keyslots initialized by [[nand/private/movable.sed]].
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	When you want to install and see pictures with 3DS, rename to 8 numbers.mpo and save it on /DCIM.		When you want to install and see pictures with 3DS, rename to 8 numbers.mpo and save it on /DCIM.
	Under the sound private dir is: voice/XX/*.m4a. Where XX is 01-10, with sound saved as .m4a.		Under the sound private dir is: voice/XX/*.m4a. Where XX is 01-10, with sound saved as .m4a.

			== Other Private Data ==

			There is also a directory called "private" on the root of the SD card that contains data, in which would otherwise be completely different from what the Nintendo 3DS normally uses, but known to the application itself.

			Some apps, such as Flipnote Studio 3D create a directory called "private" on the root of the SD Card, it contains a Nintendo 3DS directory inside it. Inside the app directory contains a directory with the game code of the application (eg. "JKZP" for Flipnote Studio 3D), then its corresponding data, as shown here:

			/private/Nintendo 3DS/app/<Game Code>/

			In this case of Flipnote Studio 3D, there are multiple files with an ID, then ending with the .kwz extension. There is also a !!.lst file as well.

3dsguy at 04:02, 18 June 2013

2013-06-18T02:02:50Z

← Older revision		Revision as of 06:02, 18 June 2013
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	Note: Playing/Recording (3D) Videos was introduced with update [[3.0.0-5]]. The 3D videos are in .avi format and the video frames use MJPG.		Note: Playing/Recording (3D) Videos was introduced with update [[3.0.0-5]]. The 3D videos are in .avi format and the video frames use MJPG.

	'''backups''' - This directory contains SD Title Savedata backups. For more info, see [[SD Savedata Backups]]		'''backups''' - This directory contains SD Title Savedata backups. For more info, see [[SD Savedata Backups]].

	'''dbs''' - This contains database files relating to the titles installed on the SD Card. These files are encrypted. For more info, see [[Title Database]]		'''dbs''' - This contains database files relating to the titles installed on the SD Card. These files are encrypted. For more info, see [[Title Database]]

3dsguy at 04:02, 18 June 2013

2013-06-18T02:02:11Z

← Older revision		Revision as of 06:02, 18 June 2013
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	├── <ID0>		├── <ID0>
	│ └── <ID1>		│ └── <ID1>
			│ ├── [[SD Savedata Backups\|backups]]
	│ ├── [[Title Database\|dbs]]		│ ├── [[Title Database\|dbs]]
	│ ├── [[extdata]]		│ ├── [[extdata]]
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	Note: Playing/Recording (3D) Videos was introduced with update [[3.0.0-5]]. The 3D videos are in .avi format and the video frames use MJPG.		Note: Playing/Recording (3D) Videos was introduced with update [[3.0.0-5]]. The 3D videos are in .avi format and the video frames use MJPG.

			'''backups''' - This directory contains SD Title Savedata backups. For more info, see [[SD Savedata Backups]]

	'''dbs''' - This contains database files relating to the titles installed on the SD Card. These files are encrypted. For more info, see [[Title Database]]		'''dbs''' - This contains database files relating to the titles installed on the SD Card. These files are encrypted. For more info, see [[Title Database]]

Yellows8 at 18:04, 21 April 2013

2013-04-21T16:04:23Z

← Older revision		Revision as of 20:04, 21 April 2013
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	│ ├── [[extdata]]		│ ├── [[extdata]]
	│ ├── [[Title Data Structure\|title]]		│ ├── [[Title Data Structure\|title]]
	│ └── [[~~System Settings#DSiWare~~\|Nintendo DSiWare]]		│ └── [[DSiWare_Exports\|Nintendo DSiWare]]
	└── [[SD Filesystem#Private\|Private]]		└── [[SD Filesystem#Private\|Private]]

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	'''title''' - Title data for titles installed to the SD Card are found here. All data in this directory is encrypted with a console-unique [[AES\|keyslot]]. For a list of SD Card titles see the [[Title list]]. For more info on the title data structure see [[Title Data Structure]].		'''title''' - Title data for titles installed to the SD Card are found here. All data in this directory is encrypted with a console-unique [[AES\|keyslot]]. For a list of SD Card titles see the [[Title list]]. For more info on the title data structure see [[Title Data Structure]].

	'''Nintendo DSiWare''' - DSiWare titles are exported here.		'''Nintendo DSiWare''' - DSiWare titles are [[DSiWare_Exports\|exported]] here.

	== Private ==		== Private ==

Yellows8 at 18:15, 28 March 2013

2013-03-28T17:15:57Z

← Older revision		Revision as of 20:15, 28 March 2013
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	* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> ~~and [[Flash Filesystem\|nand/data/<ID0>]]~~ is encrypted with console-unique [[AES\|keyslots]], ~~everything in the CTR-NAND FS encrypted using console-unique keyslots is likely~~ stored under ~~that directory as well~~. All CTR files under these directories ~~seem to~~ use the keyslots initialized by [[nand/private/movable.sed]].		* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> is encrypted with console-unique [[AES\|keyslots]], files stored under [[Flash Filesystem\|nand/data/<ID0>]] only use these keyslots for MACs. All CTR files under these directories use the keyslots initialized by [[nand/private/movable.sed]].
	* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].		* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].
	* ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:		* ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:

Yellows8 at 16:20, 24 August 2012

2012-08-24T14:20:09Z

← Older revision		Revision as of 18:20, 24 August 2012
Line 14:		Line 14:


			* Everything stored under sdmc/Nintendo 3DS/<ID0>/<ID1> and [[Flash Filesystem\|nand/data/<ID0>]] is encrypted with console-unique [[AES\|keyslots]], everything in the CTR-NAND FS encrypted using console-unique keyslots is likely stored under that directory as well. All CTR files under these directories seem to use the keyslots initialized by [[nand/private/movable.sed]].
	* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].		* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].
	* ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:		* ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:
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	'''Nintendo DSiWare''' - DSiWare titles are exported here.		'''Nintendo DSiWare''' - DSiWare titles are exported here.

	~~== Extdata ==~~
	~~Additional game data is stored here.~~

	~~See the [[extdata]] page for extdata structure/encryption info and the extdataIDs list.~~

	== Private ==		== Private ==
	"Private" data is stored here:		"Private" data is stored here as cleartext:

	/Nintendo 3DS/Private/<Title ID Low>/		/Nintendo 3DS/Private/<Title ID Low>/
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	00020500 - Nintendo 3DS Sound		00020500 - Nintendo 3DS Sound

			Under the camera private dir is [[phtcache.bin]].
	~~"Private" data for 3DS Sound/Camera are cleartext.~~		When you want to install and see pictures with 3DS, rename to 8 numbers.mpo and save it on /DCIM.
	Under the camera ~~priv~~ dir is [[phtcache.bin]]~~, this seems to list the pictures on SD card?~~		Under the sound private dir is: voice/XX/*.m4a. Where XX is 01-10, with sound saved as .m4a.
	When you want to install and see pictures with 3DS,rename to 8 numbers.mpo and save it on /DCIM .
	Under the sound ~~priv~~ dir is: voice/XX/*.m4a. Where XX is 01-10, with sound saved as .m4a.

Yellows8 at 15:58, 24 August 2012

2012-08-24T13:58:55Z

@@ Line 15: / Line 15: @@
 * ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed|hash]].
-* ID1 is the SD card CID from the SD card which this directory was originally created on, with each u16 moved around from the original CID.
+* ID1 is the scrambled SD card CID from the SD card which this directory was originally created on. To generate this directory name from the original CID, first the CID is rotated 8-bits to the left. Then, each u16 is moved as described in the below table:
 '''DCIM''' - Photos and Videos taken by the [[Nintendo 3DS Camera]] application are stored in this directory. Internet Browser image downloads are stored here too.
@@ Line 30: / Line 60: @@
 Additional game data is stored here.
-See the [[extdata]] page for more extdata info and the extdataIDs list.
+See the [[extdata]] page for extdata structure/encryption info and the extdataIDs list.
 == Private ==

3dsguy: Changed to directory tree, and added quick summaries of each relevant directory to the page.

2012-08-24T12:19:39Z

Changed to directory tree, and added quick summaries of each relevant directory to the page.

← Older revision		Revision as of 16:19, 24 August 2012
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	The 3DS uses an SD Card for general storage of ~~additional~~ game data, music and ~~photos~~ taken with the 3DS.		== Overview ==
			The 3DS uses an SD Card for general storage of game data, music, photos and videos taken with the 3DS.

	~~Most 3DS SD card data is stored under "/~~Nintendo 3DS/<ID0>/<ID1>~~", where ID0 is the first 0x10-bytes from a SHA256~~ [[~~nand/private/movable.sed~~\|~~hash~~]]~~. ID1 is the~~ SD ~~card CID from the SD card which this directory was originally created on, with each u16 moved around from the original CID.~~		sdmc
			├── DCIM
			└── Nintendo 3DS
			├── <ID0>
			│ └── <ID1>
			│ ├── [[Title Database\|dbs]]
			│ ├── [[extdata]]
			│ ├── [[Title Data Structure\|title]]
			│ └── [[System Settings#DSiWare\|Nintendo DSiWare]]
			└── [[SD Filesystem#Private\|Private]]


	* ~~sdmc/DCIM - Photos/Videos and images downloaded with~~ the ~~Internet Browser. Video feature introduced with [[3.0.0~~-~~5]]~~		* ID0 is the first 0x10-bytes from a SHA256 [[nand/private/movable.sed\|hash]].
	* [[~~SD Filesystem#Private\|sdmc~~/~~Nintendo 3DS~~/~~Private]]~~		* ID1 is the SD card CID from the SD card which this directory was originally created on, with each u16 moved around from the original CID.
	* [[Title Database\|~~sdmc/Nintendo 3DS/<ID0>/<ID1>/dbs]]~~
	* [[extdata\|sdmc/Nintendo 3DS/<ID0>/<ID1>/extdata]]
	* ~~[[Title Data Structure\|sdmc/Nintendo 3DS/<ID0>/<~~ID1~~>/title]]~~
	* [[System Settings#DSiWare\|sdmc/Nintendo 3DS/<ID0>/<ID1>/Nintendo DSiWare]]

	(The 3D videos are in .avi format and the video frames use MJPG.)		'''DCIM''' - Photos and Videos taken by the [[Nintendo 3DS Camera]] application are stored in this directory. Internet Browser image downloads are stored here too.

			Note: Playing/Recording (3D) Videos was introduced with update [[3.0.0-5]]. The 3D videos are in .avi format and the video frames use MJPG.

			'''dbs''' - This contains database files relating to the titles installed on the SD Card. These files are encrypted. For more info, see [[Title Database]]

			'''title''' - Title data for titles installed to the SD Card are found here. All data in this directory is encrypted with a console-unique [[AES\|keyslot]]. For a list of SD Card titles see the [[Title list]]. For more info on the title data structure see [[Title Data Structure]].

			'''Nintendo DSiWare''' - DSiWare titles are exported here.

	== Extdata ==		== Extdata ==
	Additional game data is stored here:		Additional game data is stored here.
	~~: /Nintendo 3DS/<ID0>/<ID1>/extdata/00000000~~

	See the [[extdata]] page for more extdata info and the extdataIDs list.		See the [[extdata]] page for more extdata info and the extdataIDs list.

	All "extra data" under [[extdata]] is encrypted. Extdata can't be decrypted with the xorpad fail used for old FLASH saves. All "extra data" files can't be copied to other 3DS SD cards, they are locked to the console.		All "extra data" under [[extdata]] is encrypted. Extdata can't be decrypted with the xorpad fail used for old FLASH saves. All "extra data" files can't be copied to other 3DS SD cards, they are locked to the console.


	== Private ==		== Private ==