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Line 100: − Decrypted Keydata format:+ − + − {| class="wikitable" border="1" − |- − ! Offset − ! Size − ! Description − |- − | 0x0 − | 0x80 − | Array of master static key encryption keys − |- − | 0x80 − | 0x10 − | [[Package1|Stage 2]] key − |} − − Starting at 0x180000 is an array of 0x200-byte entries, for a total of 32 keyblobs. Each one is unique compared to the others. They are all console unique. − − The 0xB0-byte keyblob is installed to the "customer data" section in BCTs (BCT+0x450). − − BCT offset 0x2330 is the field controlling which keyblob gets used. NS uses this to inject the appropriate keyblob on system update. [[Boot]] also uses this index for repairing corrupt sectors. − − With [ [[3.0.0]] ] index 2 is used instead of index 1. − With [ [[3.0.1]] + ] index 3 is used instead of index 2. − − The Tegra 210 BCT format can be found in nvidia's cbootimage [https://github.com/thierryreding/tegra-avp/blob/35f467996e532357db54894c975acab93293d219/include/avp/tegra210/bct.h#L521]+
no edit summary
| 0x000000
| 0x000000
| 0x4000
| 0x4000
| Title 0100000000000819 BCT
| Title 0100000000000819 [[#BCT|BCT]]
|-
|-
| 0x004000
| 0x004000
| 0x4000
| 0x4000
| Title 010000000000081A BCT
| Title 010000000000081A [[#BCT|BCT]]
|-
|-
| 0x008000
| 0x008000
| 0x4000
| 0x4000
| Title 0100000000000819 BCT
| Title 0100000000000819 [[#BCT|BCT]]
|-
|-
| 0x00C000
| 0x00C000
| 0x4000
| 0x4000
| Title 010000000000081A BCT
| Title 010000000000081A [[#BCT|BCT]]
|-
|-
| 0x100000
| 0x100000
| 0x180000
| 0x180000
| 0x4000
| 0x4000
| Keyblob area
| [[#Flash_Filesystem#Keyblob|Keyblob area]]
|-
|-
| 0x184000
| 0x184000
=== Keyblob ===
=== Keyblob ===
Starting at offset 0x180000 is an array of 0x200-byte entries, for a total of 32 keyblobs. Each one is unique compared to the others and they are all console unique.
From each 0x200-byte entry only the first 0xB0 bytes effectively form the keyblob as below.
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
| 0x0
| 0x0
| 0x10
| 0x10
| Keyblob AES-CMAC over the remaining 0xA0-bytes (Checked with a mem-diff function which is safe against timing attacks, calls the general panic() func on failure)
| Keyblob AES-CMAC over the next 0xA0 bytes (safe against timing attacks)
|-
|-
| 0x10
| 0x10
|}
|}
The bootloader0's version (offset 0x2330 in the BCT) acts as an index to control which keyblob should be installed into the system.
[[#NS_Services|NS]] uses this during system updates to install the keyblob into the customer data section in BCTs (offset 0x450).
[[Boot]] also uses this index for repairing corrupt sectors.
== User Partitions ==
== User Partitions ==