Vbmeta

avbtool info_image --image vbmeta.img

| Field | Size (bytes) | Description | |-------|--------------|-------------| | magic | 4 | Constant AVB_MAGIC = "AVB0" | | version_major | 4 | AVB format major version (e.g., 1) | | version_minor | 4 | Minor version (e.g., 0) | | authentication_data_block_size | 8 | Size of signature + public key (if embedded) | | auxiliary_data_block_size | 8 | Size of descriptors, rollback index, etc. | | algorithm_type | 4 | Signing algorithm (e.g., SHA256_RSA2048) | | hash_tree_offset | 8 | Offset to hash tree (if used) | | rollback_index | 8 | Anti-rollback counter | | flags | 4 | e.g., AVB_FLAGS_VERIFICATION_DISABLED | | public_key (variable) | – | Embedded public key (optional) | | signature (variable) | – | Signature of the header + auxiliary data | vbmeta