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main.ts
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main.ts
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// Copyright 2023 SLSA Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import * as core from "@actions/core";
import { attest, InternalError } from "sigstore";
import * as path from "path";
import * as tscommon from "tscommon";
async function run(): Promise<void> {
try {
/* Test locally:
$ env INPUT_ATTESTATIONS="testdata/attestations" \
INPUT_OUTPUT-FOLDER="outputs" \
GITHUB_WORKSPACE="$(pwd)" \
nodejs ./dist/index.js
*/
// Attestations
const attestationFolder = core.getInput("attestations");
const payloadType = core.getInput("payload-type");
// Output folder
const outputFolder = core.getInput("output-folder");
tscommon.safeMkdirSync(outputFolder, { recursive: true });
const files = await tscommon.safePromises_readdir(attestationFolder);
for (const file of files) {
const fpath = path.join(attestationFolder, file);
const stat = await tscommon.safePromises_stat(fpath);
if (stat.isFile()) {
core.debug(`Signing ${fpath}...`);
const buffer = tscommon.safeReadFileSync(fpath);
const bundle = await attest(buffer, payloadType);
const bundleStr = JSON.stringify(bundle);
const outputPath = path.join(
outputFolder,
`${path.basename(fpath)}.build.slsa`,
);
// We detect path traversal for outputPath in safeWriteFileSync.
tscommon.safeWriteFileSync(outputPath, bundleStr);
core.debug(`Wrote signed attestation to '${outputPath}.`);
}
}
} catch (error) {
if (error instanceof InternalError) {
core.setFailed(`${error}: ${error.cause}`);
} else {
core.setFailed(`Unexpected error: ${error}`);
}
}
}
run();