Switch 2: BCH: Difference between revisions
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| | | BootImgType | ||
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Revision as of 01:46, 3 October 2025
NvBootComponentHeader
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | HeaderMagic |
| 0x4 | 0x40 | OuterDigest |
| Outer Section Begin | ||
| 0x44 | 0xC | Reserved |
| 0x50 | 0x40 | InnerDigest |
| 0x90 | 0xB10 | Stage2Signature |
| 0xBA0 | 0x180 | Stage2Pcp |
| 0xD20 | 0x2A0 | |
| Stage 2 Signed Section Begin | ||
| 0xFC0 | 0x10 | Stage2Iv |
| 0xFD0 | 0x10 | Stage2Ecid |
| 0xFE0 | 0x4 | Stage2NumBinaries |
| 0xFE4 | 0x100 | Duk |
| 0x10E4 | 0x30C | |
| 0x13F0 | 0x8 | BlDerStr (must match BlDerStr from BRBCT) |
| 0x13F8 | 0x8 | FwDerStr |
| 0x1400 | 0x500 (0xA0 *8) | Stage2Components[8] |
| 0x1900 | 0x180 | Stage1Signature (always RSA-3072) |
| Stage 1 Signed Section Begin | ||
| 0x1A80 | 0x10 | Stage1Iv |
| 0x1A90 | 0x10 | Stage1Ecid |
| 0x1AA0 | 0x4 | Stage1NumBinaries |
| 0x1AA4 | 0x8 | Key7KdfLabel |
| 0x1AAC | 0x430 | |
| 0x1EE0 | 0x120 (0x90 * 2) | Stage1Components[2] |
| Stage 1 Signed Section End | ||
| Stage 2 Signed Section End | ||
| Outer Section End |
NvStage1Component
| Offset | Size | Description |
|---|---|---|
| AAD Section Start | ||
| 0x0 | 0x4 | BinaryMagic |
| 0x4 | 0x4 | BinaryLen |
| 0x8 | 0x4 | LoadDestination |
| 0xC | 0x4 | EntryPoint |
| 0x10 | 0x4 | Version |
| 0x14 | 0x4 | Reserved |
| 0x18 | 0x8 | PartitionOffset (only used for MEM-BCT) |
| 0x20 | 0x10 | DerStr |
| 0x30 | 0x4 | Reserved |
| 0x34 | 0xC | Iv |
| AAD Section End | ||
| 0x40 | 0x10 | AuthTag |
| 0x50 | 0x40 | PayloadDigest (SHA512 of 0x2000..) |
NvStage2Component
| Offset | Size | Description |
|---|---|---|
| AAD Section Start | ||
| 0x0 | 0x4 | BinaryMagic |
| 0x4 | 0x4 | BinaryLen |
| 0x8 | 0x4 | LoadDestination |
| 0xC | 0x4 | EntryPoint |
| 0x10 | 0x4 | Version |
| 0x14 | 0x4 | |
| 0x18 | 0x4 | |
| 0x1C | 0x4 | Flags0 |
| 0x20 | 0x4 | UncompressedBinaryLen |
| 0x24 | 0x4 | Flags1 |
| 0x28 | 0x4 | CompressedBinaryLen |
| 0x2C | 0x4 | Flags2 |
| 0x30 | 0x10 | DerStr |
| 0x40 | 0x4 | Reserved |
| 0x44 | 0xC | Iv |
| AAD Section End | ||
| 0x50 | 0x10 | AuthTag |
| 0x60 | 0x40 | PayloadDigest (SHA512 of 0x2000..) |
NvBootComponentVersion
| Offset | Size | Description |
|---|---|---|
| 0x0 | 1 | Major |
| 0x1 | 1 | Minor |
| 0x2 | 1 | Ratchet (others) |
| 0x2 | 2 | BigRatchet (NVDEC only) |
NvBootCryptoSignatures
This is an union.
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x20 | Sha256Signature |
| 0x0 | 0x40 | Sha512Signature |
| 0x0 | 0x40 | Rsa3072Signature |
| 0x0 | 0xB10 | XmssSignature |
NvPublicKeyParameters
This is an union.
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x20 | Eddsa |
| 0x0 | 0x40 | Ecdsa |
| 0x0 | 0x180 | Rsa |
Flags0
| Bits | Description |
|---|---|
| 0-25 | |
| 26 | IsPartitionEncrypted |
| 27 | IsCompressed |
| 28-31 |
Flags1
| Bits | Description |
|---|---|
| 0-23 | |
| 16-23 | BootImgType |
| 24-31 |
Flags2
| Bits | Description |
|---|---|
| 0-7 | |
| 8 | IsClassKeysSigned |
| 9-31 |