update

package/node_modules/@sigstore/sign/dist/bundler/base.js

@@ -0,0 +1,50 @@
+"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;
+    }
+}