blob: ef4fce5f1af8c44486e3d4dacae768ed64274d7e [file] [log] [blame]
// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
use {
anyhow::{Context, Result},
/// Command-line arguments for the vbmeta tool.
struct Args {
/// path to a ZBI.
zbi: PathBuf,
/// path to a private key PEM.
private_key_pem: PathBuf,
/// path to a public key metadata file.
public_key_metadata: PathBuf,
/// path at which to output the corresponding VBMeta.
output: PathBuf,
fn main() -> Result<()> {
let args: Args = argh::from_env();
let zbi = std::fs::read(args.zbi).context("failed to read ZBI")?;
let pem = std::fs::read(args.private_key_pem).context("failed to read private key PEM")?;
let pem_str = std::str::from_utf8(&pem).context("failed to convert PEM to string")?;
let metadata =
std::fs::read(args.public_key_metadata).context("failed to read public key metadata")?;
let key = vbmeta::Key::try_new(pem_str, metadata).context("failed to create AVB key")?;
let salt = vbmeta::Salt::random().context("failed to season")?;
let descriptor = vbmeta::HashDescriptor::new("zircon", &zbi, salt);
let vbmeta = vbmeta::VBMeta::sign(vec![descriptor], key).unwrap();
std::fs::write(args.output, vbmeta.as_bytes()).context("failed to write VBMeta to file")?;