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Imported some BootMii stuff here and changed the link to ceiling cat
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−'''BackupMii''' is the [[NAND]]-backup system in [[BootMii]] that is responsible for backing up the filesystem and keys; [[RestoreMii]] is responsible for restoring the backup.
+'''BackupMii''' is the [[NAND]]-backup system in [[CEIL1NG_CAT]] that is responsible for backing up the filesystem and keys; [[RestoreMii]] is responsible for restoring the backup.
== Accessing BackupMii ==
== Accessing BackupMii ==
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== Usage ==
== Usage ==
While BackupMii is running, a chart of all blocks can be seen; there will always be a block highlighted to indicate that it is currently being worked on. As that square moves forward, blocks will be marked as backed up or bad, as they are backed up. There is also an optional step of checking to make sure the backup is valid; this is recommended to be safe.
While BackupMii is running, a chart of all blocks can be seen; there will always be a block highlighted to indicate that it is currently being worked on. As that square moves forward, blocks will be marked as backed up or bad, as they are backed up. There is also an optional step of checking to make sure the backup is valid; this is recommended to be safe.
+
+== NAND dump format ==
+BackupMii creates a 553649152-byte NAND dump called "nand.bin" on an SD card. It is formatted as:
+
+ 4096 * 64 pages of (2048 + 64) bytes of data + ECC
+ A 1024-byte footer with keying information
+
+Specifically, the format of that 1024-byte footer is:
+
+ 256 bytes of human-readable information (e.g. "BackupMii v1\nConsole ID: 0408cafa"), padded with null bytes
+ 128 bytes of OTP data (copied directly from OTP)
+
+ 128 bytes of padding
+ 256 bytes of SEEPROM data (copied directly from OTP)
+ 256 bytes of padding
+
+== Console Keys and keys.bin ==
+Instead of using [[WiiND]], you can retrieve your console keys from the keys.bin file that BackupMii v3+ produces when backing up the [[NAND]]. To view them, open keys.bin with a hex editor.<br />
+Here are the offsets for each key:
+<pre>
+boot1 hash: 0x100 (20 bytes)
+Common key (AES): 0x114 (16 bytes)
+Console ID: 0x124 (4 bytes)
+ECC Private Key: 0x128 (30 bytes)
+NAND HMAC: 0x144 (20 bytes)
+NAND AES key: 0x158 (16 bytes)
+PRNG seed (AES): 0x168 (16 bytes)
+ng_key_id: 0x208 (4 bytes)
+ng_sig: 0x20c (60 bytes)</pre>
+
+For a full description of the purpose of each key, see [http://hackmii.com/2008/04/keys-keys-keys/ this writeup on HackMii].