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Add vendor and owner signature injection to image generator tool #1892

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merged 1 commit into from
Jan 24, 2025
Merged

Add vendor and owner signature injection to image generator tool #1892

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22 changes: 20 additions & 2 deletions builder/bin/image_gen.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,12 +5,14 @@ use caliptra_builder::version;
use caliptra_builder::ImageOptions;
use caliptra_image_types::ImageHeader;
use caliptra_image_types::ImageManifest;
use caliptra_image_types::ImageSignatures;
use clap::{arg, value_parser, Command};
use memoffset::{offset_of, span_of};
use serde_json::{json, to_string_pretty};
use sha2::{Digest, Sha384};
use std::collections::HashSet;
use std::path::PathBuf;
use zerocopy::FromBytes;

fn main() {
let args = Command::new("image-gen")
Expand Down Expand Up @@ -43,6 +45,8 @@ fn main() {
.value_parser(value_parser!(PathBuf))
)
.arg(arg!(--"zeros" "Build an image bundle with zero'd FMC and RT. This will NMI immediately."))
.arg(arg!(--"owner-sig-override" [FILE] "Manually overwrite the owner_sigs of the FW bundle image with the contents of binary [FILE]. The signature should be an ECC signature concatenated with an LMS signature").value_parser(value_parser!(PathBuf)))
.arg(arg!(--"vendor-sig-override" [FILE] "Manually overwrite the vendor_sigs of the FW bundle image with the contents of binary [FILE]. The signature should be an ECC signature concatenated with an LMS signature").value_parser(value_parser!(PathBuf)))
.get_matches();

if let Some(path) = args.get_one::<PathBuf>("rom-no-log") {
Expand Down Expand Up @@ -81,7 +85,7 @@ fn main() {
)
.unwrap()
} else {
caliptra_builder::build_and_sign_image(
let mut image = caliptra_builder::build_and_sign_image(
&firmware::FMC_WITH_UART,
&firmware::APP_WITH_UART,
ImageOptions {
Expand All @@ -92,7 +96,21 @@ fn main() {
..Default::default()
},
)
.unwrap()
.unwrap();

if let Some(path) = args.get_one::<PathBuf>("owner-sig-override") {
let sig_override = std::fs::read(path).unwrap();
image.manifest.preamble.owner_sigs =
ImageSignatures::read_from_bytes(&sig_override).unwrap();
}

if let Some(path) = args.get_one::<PathBuf>("vendor-sig-override") {
let sig_override = std::fs::read(path).unwrap();
image.manifest.preamble.vendor_sigs =
ImageSignatures::read_from_bytes(&sig_override).unwrap();
}

image
};

let contents = image.to_bytes().unwrap();
Expand Down
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