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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.BaseBundleBuilder = void 0;
// BaseBundleBuilder is a base class for BundleBuilder implementations. It
// provides a the basic wokflow for signing and witnessing an artifact.
// Subclasses must implement the `package` method to assemble a valid bundle
// with the generated signature and verification material.
class BaseBundleBuilder {
constructor(options) {
this.signer = options.signer;
this.witnesses = options.witnesses;
}
// Executes the signing/witnessing process for the given artifact.
async create(artifact) {
const signature = await this.prepare(artifact).then((blob) => this.signer.sign(blob));
const bundle = await this.package(artifact, signature);
// Invoke all of the witnesses in parallel
const verificationMaterials = await Promise.all(this.witnesses.map((witness) => witness.testify(bundle.content, publicKey(signature.key))));
// Collect the verification material from all of the witnesses
const tlogEntryList = [];
const timestampList = [];
verificationMaterials.forEach(({ tlogEntries, rfc3161Timestamps }) => {
tlogEntryList.push(...(tlogEntries ?? []));
timestampList.push(...(rfc3161Timestamps ?? []));
});
// Merge the collected verification material into the bundle
bundle.verificationMaterial.tlogEntries = tlogEntryList;
bundle.verificationMaterial.timestampVerificationData = {
rfc3161Timestamps: timestampList,
};
return bundle;
}
// Override this function to apply any pre-signing transformations to the
// artifact. The returned buffer will be signed by the signer. The default
// implementation simply returns the artifact data.
async prepare(artifact) {
return artifact.data;
}
}
exports.BaseBundleBuilder = BaseBundleBuilder;
// Extracts the public key from a KeyMaterial. Returns either the public key
// or the certificate, depending on the type of key material.
function publicKey(key) {
switch (key.$case) {
case 'publicKey':
return key.publicKey;
case 'x509Certificate':
return key.certificate;
}
}