BCT - Revision history

Ootulp at 20:37, 17 June 2025

2025-06-17T18:37:54Z

← Older revision		Revision as of 22:37, 17 June 2025
Line 50:		Line 50:
	! Size		! Size
	! Description		! Description
			\|-
			\| style="background: orange" \| AAD Section Begin
			\| style="background: orange" \|
			\| style="background: orange" \|
	\|-		\|-
	\| 0x0		\| 0x0
	\| 0x10		\| 0x10
	\|		\| Salt1. Random 16 bytes.
	\|-		\|-
	\| 0x10		\| 0x10
Line 61:		Line 65:
	\| 0x14		\| 0x14
	\| 0x14		\| 0x14
	\|		\| KdfLabel
	\|-		\|-
	\| 0x28		\| 0x28
	\| 0x4		\| 0x4
	\|		\| Zeroes
	\|-		\|-
	\| 0x2C		\| 0x2C
	\| ~~0x1C~~		\| 0x0C
	\|		\| AesGcmIv
			\|-
			\| style="background: orange" \| AAD Section End
			\| style="background: orange" \|
			\| style="background: orange" \|
			\|-
			\| 0x38
			\| 0x10
			\| AesGcmTag
	\|-		\|-
	\| 0x48		\| 0x48
Line 89:		Line 101:
	\| 0x10B		\| 0x10B
	\| 0x1		\| 0x1
	\| RevokePk		\| RevokePk. Bit0: RevokeH0, Bit1: RevokeH1
	\|-		\|-
	\| 0x10C		\| 0x10C
Line 101:		Line 113:
	\| 0x790		\| 0x790
	\| 0x10		\| 0x10
	\|		\| Salt2. Random 16 bytes.
	\|-		\|-
	\| 0x7A0		\| 0x7A0
Line 108:		Line 120:
	\|-		\|-
	\| 0x7B0		\| 0x7B0
	\| ~~0x28~~		\| 0x8
	\|		\| BrBctBinding
			\|-
			\| 0x7B8
			\| 0x8
			\| SbkKdfLabel
			\|-
			\| 0x7C0
			\| 0x8
			\| UnknownKdfLabel0
			\|-
			\| 0x7C8
			\| 0x8
			\| UnknownKdfLabel1
			\|-
			\| 0x7D0
			\| 0x8
			\| FsiKdfLabel
	\|-		\|-
	\| 0x7D8		\| 0x7D8
Line 140:		Line 168:
	\|-		\|-
	\| 0x7F4		\| 0x7F4
	\| ~~0x87~~		\| 0x20
			\| TzTestKey
			\|-
			\| 0x814
			\| 0x20
			\| FskpTestKey
			\|-
			\| 0x834
			\| 0x20
			\| PkaTestKey
			\|-
			\| 0x854
			\| 0x24
	\|		\|
			\|-
			\| 0x878
			\| 0x01
			\| FskpKeyAesType
			\|-
			\| 0x879
			\| 0x01
			\| FskpKeyHmacType
			\|-
			\| 0x87A
			\| 0x01
			\| PkaTestKeyType
	\|-		\|-
	\| 0x87B		\| 0x87B

Hexkyz at 02:35, 17 June 2025

2025-06-17T00:35:09Z

← Older revision		Revision as of 04:35, 17 June 2025
Line 21:		Line 21:
	\| 0x44		\| 0x44
	\| 0x180		\| 0x180
	\| ~~Pcp~~		\| PublicParams
	\|-		\|-
	\| 0x1C4		\| 0x1C4
Line 29:		Line 29:
	\| 0x204		\| 0x204
	\| 0xB10		\| 0xB10
	\| CryptoSignature		\| CryptoSignature (XMSS-SHA2_20_256 signature)
	\|-		\|-
	\| 0xD14		\| 0xD14
Line 60:		Line 60:
	\|-		\|-
	\| 0x14		\| 0x14
	\| ~~0x38~~		\| 0x14
			\|
			\|-
			\| 0x28
			\| 0x4
			\|
			\|-
			\| 0x2C
			\| 0x1C
	\|		\|
	\|-		\|-
Line 88:		Line 96:
	\|-		\|-
	\| 0x50C		\| 0x50C
	\| ~~0x294~~		\| 0x284
			\|
			\|-
			\| 0x790
			\| 0x10
	\|		\|
	\|-		\|-
Line 165:		Line 177:
	\| 0x0		\| 0x0
	\| 0x4		\| 0x4
	\| ~~StartBlock~~		\| StartBlock0
	\|-		\|-
	\| 0x4		\| 0x4
	\| 0x4		\| 0x4
	\| ~~StartPage~~		\| StartPage0
	\|-		\|-
	\| 0x8		\| 0x8
	\| 0x4		\| 0x4
	\|		\| Version0
	\|-		\|-
	\| 0xC		\| 0xC
	\| 0x4		\| 0x4
	\|		\| Random0
	\|-		\|-
	\| 0x10		\| 0x10
			\| 0x4
			\| StartBlock1
			\|-
			\| 0x14
			\| 0x4
			\| StartPage1
			\|-
			\| 0x18
			\| 0x4
			\| Version1
			\|-
			\| 0x1C
			\| 0x4
			\| Random1
			\|-
	\| 0x20		\| 0x20
	\|		\| 0x4
			\| StartBlock2
			\|-
			\| 0x24
			\| 0x4
			\| StartPage2
			\|-
			\| 0x28
			\| 0x4
			\| Version2
			\|-
			\| 0x2C
			\| 0x4
			\| Random2
	\|}		\|}

Hexkyz at 01:53, 17 June 2025

2025-06-16T23:53:09Z

Show changes

Hexkyz: Created page with "BCT (Boot Configuration Table) is a data structure present on Tegra based devices that supplies boot time configuration parameters. The Switch 2 can use different types of BCTs with the BRBCT (BootROM BCT) being installed into the first bytes of UFS storage's LUN0 and LUN1. = Structure = == BRBCT == {| class="wikitable" border="1" |- ! Offset ! Size ! Description |- | 0x0 | 0x4 | Magic ("BCTB") |- | 0x4 | 0x4..."

2025-06-16T22:38:50Z

Created page with "BCT (Boot Configuration Table) is a data structure present on Tegra based devices that supplies boot time configuration parameters. The Switch 2 can use different types of BCTs with the BRBCT (BootROM BCT) being installed into the first bytes of UFS storage's LUN0 and LUN1. = Structure = == BRBCT == {| class="wikitable" border="1" |- ! Offset ! Size ! Description |- | 0x0 | 0x4 | Magic ("BCTB") |- | 0x4 | 0x4..."

New page

BCT (Boot Configuration Table) is a data structure present on Tegra based devices that supplies boot time configuration parameters.

The Switch 2 can use different types of BCTs with the BRBCT (BootROM BCT) being installed into the first bytes of UFS storage's [[Flash_Filesystem#LUN0|LUN0]] and [[Flash_Filesystem#LUN1|LUN1]].

= Structure =
== BRBCT ==
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| Magic ("BCTB")
|-
| 0x4
| 0x40
| BctSha512Hash (hash over data from 0x44 to 0x2000)
|-
| 0x44
| 0x180
| Signatures
|-
| 0x1C4
| 0x40
| SignedSectSha512Hash (hash over data from 0x1200 to 0x2000)
|-
| 0x204
| 0xB10
| Pcp
|-
| 0xD14
| 0x400
| CustomerInfo
|-
| 0x1114
| 0xEC
|
|-
| 0x1200
| 0xE00
| SignedSect
|}

=== SignedSect ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x10
|
|-
| 0x10
| 0x4
| Magic ("BCTB")
|-
| 0x14
| 0x38
|
|-
| 0x48
| 0xC0 (0x10 * 12)
| BlInfo
|-
| 0x108
| 0x4
|
|-
| 0x10C
| 0x400
| CustomerInfo
|-
| 0x50C
| 0x294
|
|-
| 0x7A0
| 0x10
| Ecid
|-
| 0x7B0
| 0x28
|
|-
| 0x7D8
| 0x4
| NonGpioSelectBootChain
|-
| 0x7DC
| 0x4
| BootLoadersUsed
|-
| 0x7E0
| 0x4
| SecureDebugControlNoneEcid
|-
| 0x7E4
| 0x4
| SecureDebugControlEcid
|-
| 0x7E8
| 0x4
| PreprodDevSign
|-
| 0x7EC
| 0x4
| SecProvisioningKeynumSecure
|-
| 0x7F0
| 0x4
| BfBlBits
|-
| 0x7F4
| 0x87
|
|-
| 0x87B
| 0x20
| SecProvisionDerivationString1
|-
| 0x89B
| 0x20
| SecProvisionDerivationString2
|-
| 0x8BB
| 0x1
|
|-
| 0x8BC
| 0x4
| SoftSkuOverwrite
|-
| 0x8C0
| 0x540
|
|}

==== BlInfo ====
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| StartBlock
|-
| 0x4
| 0x4
| StartPage
|-
| 0x8
| 0x4
| Version
|-
| 0xC
| 0x4
| Random
|}