https://switch2brew.org/w/index.php?action=history&feed=atom&title=BCH
BCH - Revision history
2026-04-24T16:38:50Z
Revision history for this page on the wiki
MediaWiki 1.43.1
https://switch2brew.org/w/index.php?title=BCH&diff=90&oldid=prev
Ootulp: Created page with "= NvBootComponentHeader = {| class="wikitable" border="1" |- ! Offset ! Size ! Name ! Description |- | 0x0000 || 4 || HeaderMagic || |- | 0x0004 || 0x40 || OuterDigest || |- | style="background: orange" | Outer Section Begin | style="background: orange" | | style="background: orange" | | style="background: orange" | |- | 0x0044 || 0xC || Reserved || |- | 0x0050 || 0x40 || InnerDigest || |- | 0x0090 || 0x40 || Stage2Signature || |- | 0x0BA0..."
2025-06-15T02:01:17Z
<p>Created page with "= NvBootComponentHeader = {| class="wikitable" border="1" |- ! Offset ! Size ! Name ! Description |- | 0x0000 || 4 || HeaderMagic || |- | 0x0004 || 0x40 || OuterDigest || |- | style="background: orange" | Outer Section Begin | style="background: orange" | | style="background: orange" | | style="background: orange" | |- | 0x0044 || 0xC || Reserved || |- | 0x0050 || 0x40 || InnerDigest || |- | 0x0090 || 0x40 || <a href="#NvBootCryptoSignatures">Stage2Signature</a> || |- | 0x0BA0..."</p>
<p><b>New page</b></p><div>= NvBootComponentHeader =<br />
{| class="wikitable" border="1"<br />
|-<br />
! Offset<br />
! Size<br />
! Name<br />
! Description<br />
|-<br />
| 0x0000 || 4 || HeaderMagic ||<br />
|-<br />
| 0x0004 || 0x40 || OuterDigest ||<br />
|-<br />
| style="background: orange" | Outer Section Begin<br />
| style="background: orange" | <br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|-<br />
| 0x0044 || 0xC || Reserved ||<br />
|-<br />
| 0x0050 || 0x40 || InnerDigest ||<br />
|-<br />
| 0x0090 || 0x40 || [[#NvBootCryptoSignatures|Stage2Signature]] ||<br />
|-<br />
| 0x0BA0 || 0x180 || [[#NvPublicKeyParameters|Stage2Pcp]] || Pinned by fuses.<br />
|-<br />
| style="background: orange" | Stage 2 Signed Section Begin <br />
| style="background: orange" | <br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|-<br />
| 0x0FC0 || 16 || Salt2 || Random 16 bytes.<br />
|-<br />
| 0x0FD0 || 16 || Stage2Ecid || <br />
|-<br />
| 0x0FE0 || 4 || Stage2NumBinaries || <br />
|-<br />
| 0x0FE4 || 0x100 || ? || <br />
|-<br />
| 0x13F0 || 8 || BrbctBinding || Must match BR-BCT+0x19B0.<br />
|-<br />
| 0x1400 || 8 * 0xA0 || [[#NvStage2Component|Stage2Components]][8] ||<br />
|-<br />
| 0x1900 || 0x180 || Stage1Signature || Always RSA-3072.<br />
|-<br />
| style="background: orange" | Stage 1 Signed Section Begin<br />
| style="background: orange" | <br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|-<br />
| 0x1A80 || 16 || Salt3 ||<br />
|-<br />
| 0x1A90 || 16 || Stage1Ecid || <br />
|-<br />
| 0x1AA0 || 4 || Stage1NumBinaries || <br />
|-<br />
| 0x1AA4 || 8 || Key7KdfLabel || <br />
|-<br />
| 0x1EE0 || 1 * 0x90 || [[#NvStage1Component|Stage1Components]][1] ||<br />
|-<br />
| style="background: orange" | Outer Section End / Stage 2 Signed Section End / Stage 1 Signed Section End<br />
| style="background: orange" | <br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|}<br />
<br />
== NvStage1Component ==<br />
{| class="wikitable" border="1"<br />
|-<br />
! Offset<br />
! Size<br />
! Name<br />
|-<br />
| style="background: orange" | AAD Section Start<br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|-<br />
| 0x0 || 4 || BinaryMagic<br />
|-<br />
| 0x4 || 4 || BinaryLen<br />
|-<br />
| 0x8 || 4 || LoadDestination<br />
|-<br />
| 0xC || 4 || EntryPoint<br />
|-<br />
| 0x10 || 4 || [[#NvBootComponentVersion|Version]]<br />
|-<br />
| 0x14 || 4 || Reserved <br />
|-<br />
| 0x18 || 8 || PartitionOffset (Only used for MEM-BCT)<br />
|-<br />
| 0x20 || 16 || KdfLabel<br />
|-<br />
| 0x30 || 4 || Zeroes <br />
|-<br />
| 0x34 || 12 || GcmIv<br />
|-<br />
| style="background: orange" | AAD Section End<br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|-<br />
| 0x40 || 16 || GcmAuthTag<br />
|-<br />
| 0x50 || 64 || PayloadDigest (SHA512 of 0x2000..)<br />
|}<br />
<br />
== NvStage2Component ==<br />
{| class="wikitable" border="1"<br />
|-<br />
! Offset<br />
! Size<br />
! Name<br />
|-<br />
| style="background: orange" | AAD Section Start<br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|-<br />
| 0x0 || 4 || BinaryMagic<br />
|-<br />
| 0x4 || 4 || BinaryLen<br />
|-<br />
| 0x8 || 4 || LoadDestination<br />
|-<br />
| 0xC || 4 || EntryPoint<br />
|-<br />
| 0x10 || 4 || [[#NvBootComponentVersion|Version]]<br />
|-<br />
| 0x24 || 0x1C || ?<br />
|-<br />
| 0x30 || 16 || KdfLabel<br />
|-<br />
| 0x40 || 4 || Zeroes<br />
|-<br />
| 0x44 || 12 || GcmIv<br />
|-<br />
| style="background: orange" | AAD Section End<br />
| style="background: orange" | <br />
| style="background: orange" | <br />
|-<br />
| 0x50 || 16 || GcmAuthTag<br />
|-<br />
| 0x60 || 64 || PayloadDigest (SHA512 of 0x2000..)<br />
|}<br />
<br />
== NvBootComponentVersion ==<br />
{| class="wikitable" border="1"<br />
|-<br />
! Offset<br />
! Size<br />
! Name<br />
|-<br />
| 0x0 || 1 || Major<br />
|-<br />
| 0x1 || 1 || Minor<br />
|-<br />
| 0x2 || 1 || Ratchet (others)<br />
|-<br />
| 0x2 || 2 || BigRatchet (NVDEC only)<br />
|}<br />
<br />
== NvBootCryptoSignatures ==<br />
This is a union.<br />
<br />
{| class="wikitable" border="1"<br />
|-<br />
! Offset<br />
! Size<br />
! Name<br />
|-<br />
| 0x0 || 0x20 || Sha256Signature<br />
|-<br />
| 0x0 || 0x40 || Sha512Signature<br />
|-<br />
| 0x0 || 0x40 || Rsa3072Signature<br />
|-<br />
| 0x0 || 0xB10 || XmssSignature<br />
|}</div>
Ootulp