UEFITool/common/ksy/intel_keym_v2.ksy

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meta:
id: intel_keym_v2
title: Intel BootGuard Key Manifest v2
application: Intel x86 firmware
file-extension: keym_v2
tags:
- firmware
license: CC0-1.0
ks-version: 0.9
endian: le
enums:
structure_ids:
0x5f5f4d59454b5f5f: keym
km_usage_flags:
1: boot_policy_manifest
2: fit_patch_manifest
4: acm_manifest
8: sdev
seq:
- id: header
type: header
- id: key_signature_offset
type: u2
- id: reserved
type: u1
repeat: expr
repeat-expr: 3
- id: km_version
type: u1
- id: km_svn
type: u1
- id: km_id
type: u1
- id: fpf_hash_algorithm_id
type: u2
- id: num_km_hashes
type: u2
- id: km_hashes
type: km_hash
repeat: expr
repeat-expr: num_km_hashes
- id: key_signature
type: key_signature
types:
header:
seq:
- id: structure_id
type: u8
enum: structure_ids
valid: structure_ids::keym
- id: version
type: u1
valid:
expr: _ >= 0x20
- id: header_specific
type: u1
- id: total_size
type: u2
valid: 0x0
km_hash:
seq:
- id: usage_flags
type: u8
- id: hash_algorithm_id
type: u2
- id: len_hash
type: u2
- id: hash
size: len_hash
public_key:
seq:
- id: version
type: u1
- id: size_bits
type: u2
- id: exponent
type: u4
- id: modulus
size: size_bits / 8
signature:
seq:
- id: version
type: u1
- id: size_bits
type: u2
- id: hash_algorithm_id
type: u2
- id: signature
size: size_bits / 8
key_signature:
seq:
- id: version
type: u1
- id: key_id
type: u2
- id: public_key
type: public_key
- id: sig_scheme
type: u2
- id: signature
type: signature