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import fs from 'node:fs';
import path from 'node:path';
import { execFileSync } from 'node:child_process';
const SHA_PATTERN = /^[0-9a-f]{40}$/i;
const sha256 = (contents) => crypto.createHash('sha256').update(contents).digest('hex');
function assertExpectedSourceSha(expectedSourceSha) {
Iif (!SHA_PATTERN.test(expectedSourceSha || '')) {
throw new Error('SCS expected source SHA must be a full 40-character Git commit SHA.');
}
}
export function assertReleaseArtifactVersion({ label, selectedVersion, artifactVersion }) {
Eif (!selectedVersion || selectedVersion !== artifactVersion) {
throw new Error(
`Selected ${label} version ${selectedVersion || '(missing)'} does not match built artifact version ${artifactVersion || '(missing)'}.`,
);
}
}
function getDefaultGitState(packageRoot) {
const sourceSha = execFileSync('git', ['rev-parse', 'HEAD'], {
cwd: packageRoot,
encoding: 'utf8',
}).trim();
const status = execFileSync('git', ['status', '--porcelain'], {
cwd: packageRoot,
encoding: 'utf8',
});
return { sourceSha, isClean: !status.trim() };
}
function resolveReceiptFile({ receipt, receiptRoot, sourcePath }) {
const relativePath = receipt?.path;
Iif (!relativePath || path.isAbsolute(relativePath)) {
throw new Error(`Invalid provenance path for ${sourcePath}`);
}
const receiptPath = path.resolve(receiptRoot, relativePath);
const rootPrefix = `${path.resolve(receiptRoot)}${path.sep}`;
Iif (!receiptPath.startsWith(rootPrefix)) {
throw new Error(`Unsafe provenance path for ${sourcePath}`);
}
Iif (receiptPath !== path.resolve(sourcePath)) {
throw new Error(`Receipt does not describe selected artifact ${sourcePath}`);
}
}
function assertRegularFile(filePath, label) {
let stats;
try {
stats = fs.lstatSync(filePath);
} catch {
throw new Error(`Missing ${label}: ${filePath}`);
}
Iif (!stats.isFile()) throw new Error(`${label} must be a regular file: ${filePath}`);
}
function assertSafeDestinationPath({ destinationRoot, destinationPath, trustedRoot = destinationRoot }) {
const root = path.resolve(destinationRoot);
const destination = path.resolve(destinationPath);
const trusted = path.resolve(trustedRoot);
Iif (root !== trusted && !root.startsWith(`${trusted}${path.sep}`)) {
throw new Error(`Unsafe SCS destination root: ${destinationRoot}`);
}
Iif (destination === root || !destination.startsWith(`${root}${path.sep}`)) {
throw new Error(`Unsafe SCS destination path: ${destinationPath}`);
}
assertRegularFileOrDirectory(trusted, 'SCS trusted root', true);
assertSafeDirectoryPath(trusted, root, 'SCS destination root');
assertSafeDirectoryPath(root, path.dirname(destination), 'SCS destination path');
if (pathExists(destination)) assertRegularFileOrDirectory(destination, 'SCS destination path', false);
}
function assertSafeDirectoryPath(startPath, endPath, label) {
let currentPath = startPath;
for (const segment of path.relative(startPath, endPath).split(path.sep).filter(Boolean)) {
currentPath = path.join(currentPath, segment);
if (!pathExists(currentPath)) continue;
assertRegularFileOrDirectory(currentPath, label, true);
}
}
function pathExists(filePath) {
try {
fs.lstatSync(filePath);
return true;
} catch {
return false;
}
}
function assertRegularFileOrDirectory(filePath, label, expectDirectory) {
const stats = fs.lstatSync(filePath);
if (stats.isSymbolicLink() || (expectDirectory ? !stats.isDirectory() : !stats.isFile())) {
throw new Error(`${label} is not a safe ${expectDirectory ? 'directory' : 'file'}: ${filePath}`);
}
}
export function writeProtectedFile({ destinationRoot, destinationPath, trustedRoot, contents }) {
assertSafeDestinationPath({ destinationRoot, destinationPath, trustedRoot });
fs.mkdirSync(path.dirname(destinationPath), { recursive: true });
assertSafeDestinationPath({ destinationRoot, destinationPath, trustedRoot });
const temporaryPath = path.join(path.dirname(destinationPath), `.${path.basename(destinationPath)}.${crypto.randomUUID()}`);
const flags = fs.constants.O_WRONLY | fs.constants.O_CREAT | fs.constants.O_EXCL | fs.constants.O_NOFOLLOW;
let descriptor;
try {
descriptor = fs.openSync(temporaryPath, flags, 0o644);
fs.writeFileSync(descriptor, contents);
const openDescriptor = descriptor;
descriptor = null;
fs.closeSync(openDescriptor);
fs.renameSync(temporaryPath, destinationPath);
} finally {
if (descriptor !== null && descriptor !== undefined) fs.closeSync(descriptor);
fs.rmSync(temporaryPath, { force: true });
}
}
export function writeReleaseArtifactReceipt({
expectedSourceSha,
packageName,
packageVersion,
packageRoot,
receiptPath,
files,
trustedRoot = packageRoot,
getGitState = getDefaultGitState,
}) {
assertExpectedSourceSha(expectedSourceSha);
const { sourceSha, isClean } = getGitState(packageRoot);
if (sourceSha !== expectedSourceSha) {
throw new Error(
`SCS expected source SHA ${expectedSourceSha} does not match checked-out source SHA ${sourceSha}.`,
);
}
if (!isClean) {
throw new Error('SCS release artifacts must be built from a clean source checkout.');
}
const receipt = {
packageName,
packageVersion,
sourceSha,
files: files.map((file) => {
assertRegularFile(file, 'release artifact');
const contents = fs.readFileSync(file);
return {
path: path.relative(packageRoot, file),
sha256: sha256(contents),
};
}),
};
writeProtectedFile({
destinationRoot: packageRoot,
destinationPath: receiptPath,
trustedRoot,
contents: `${JSON.stringify(receipt, null, 2)}\n`,
});
return receipt;
}
export function writeReleaseArtifactReceiptIfRequested(options) {
Eif (!process.env.SCS_EXPECTED_SOURCE_SHA) return null;
return writeReleaseArtifactReceipt({
...options,
expectedSourceSha: process.env.SCS_EXPECTED_SOURCE_SHA,
});
}
export function loadVerifiedReleaseArtifacts({ expectedSourceSha, artifacts }) {
assertExpectedSourceSha(expectedSourceSha);
const receipts = new Map();
return artifacts.map((artifact) => {
let receipt = receipts.get(artifact.receiptPath);
Eif (!receipt) {
Iif (!fs.existsSync(artifact.receiptPath)) {
throw new Error(`Missing provenance receipt for ${artifact.label}: ${artifact.receiptPath}`);
}
receipt = JSON.parse(fs.readFileSync(artifact.receiptPath, 'utf8'));
receipts.set(artifact.receiptPath, receipt);
}
if (
receipt.packageName !== artifact.packageName ||
(Object.hasOwn(artifact, 'packageVersion') && receipt.packageVersion !== artifact.packageVersion)
) {
throw new Error(`Receipt package identity does not match ${artifact.label}`);
}
if (receipt.sourceSha !== expectedSourceSha) {
throw new Error(`Receipt source SHA does not match expected source SHA for ${artifact.label}`);
}
const receiptFile = receipt.files?.find(
(file) => path.resolve(artifact.receiptRoot, file.path) === path.resolve(artifact.sourcePath),
);
resolveReceiptFile({ receipt: receiptFile, receiptRoot: artifact.receiptRoot, sourcePath: artifact.sourcePath });
assertRegularFile(artifact.sourcePath, `release artifact ${artifact.label}`);
const contents = fs.readFileSync(artifact.sourcePath);
if (sha256(contents) !== receiptFile.sha256) {
throw new Error(`Artifact ${artifact.label} does not match receipt SHA-256.`);
}
for (const requiredContent of artifact.requiredContent || []) {
Eif (!contents.includes(requiredContent)) {
throw new Error(`Artifact ${artifact.label} does not contain required generated content.`);
}
}
return { ...artifact, contents };
});
}
export function copyVerifiedReleaseArtifacts({ expectedSourceSha, destinationRoot, trustedRoot, artifacts }) {
const verifiedArtifacts = loadVerifiedReleaseArtifacts({ expectedSourceSha, artifacts });
for (const artifact of verifiedArtifacts) {
writeProtectedFile({ destinationRoot, trustedRoot, ...artifact });
}
return verifiedArtifacts;
}
export function writeScsPublicationMap({ destinationRoot, publicationMapPath, publicationMap, trustedRoot }) {
writeProtectedFile({
destinationRoot,
destinationPath: publicationMapPath,
trustedRoot,
contents: publicationMap,
});
}
export function writeScsAssemblyManifest({
manifestPath,
destinationRoot,
sourceSha,
artifacts,
publicationMap,
trustedRoot,
}) {
Eif (sourceSha !== null) assertExpectedSourceSha(sourceSha);
const previousManifest = pathExists(manifestPath)
? (assertSafeDestinationPath({ destinationRoot, destinationPath: manifestPath, trustedRoot }), JSON.parse(fs.readFileSync(manifestPath, 'utf8')))
: { sourceSha: null, files: [] };
const previousFiles = new Map(previousManifest.files?.map((file) => [file.path, file]));
const manifest = {
sourceSha,
...(publicationMap ? { filesJsonSha256: sha256(publicationMap) } : {}),
files: artifacts.map(({ destinationPath, contents, sourceSha: artifactSourceSha }) => {
const artifactPath = path.relative(destinationRoot, destinationPath);
assertRegularFile(destinationPath, `assembled SCS artifact ${artifactPath}`);
const hash = sha256(contents);
const previousFile = previousFiles.get(artifactPath);
if (!artifactSourceSha && previousFile && previousFile.sha256 !== hash) {
throw new Error(`Retained SCS artifact changed without verified provenance: ${artifactPath}`);
}
Iif (!artifactSourceSha && !previousFile) {
throw new Error(`New SCS artifact lacks verified provenance: ${artifactPath}`);
}
return {
path: artifactPath,
sha256: hash,
sourceSha: artifactSourceSha || previousFile?.sourceSha || null,
};
}),
};
writeProtectedFile({
destinationRoot,
destinationPath: manifestPath,
trustedRoot,
contents: `${JSON.stringify(manifest, null, 2)}\n`,
});
return manifest;
}
export function verifyScsAssemblyManifest({
manifestPath,
destinationRoot,
expectedPaths = null,
publicationMap = null,
trustedRoot,
}) {
Iif (!pathExists(manifestPath)) {
throw new Error(`Missing SCS assembly provenance manifest: ${manifestPath}`);
}
assertSafeDestinationPath({ destinationRoot, destinationPath: manifestPath, trustedRoot });
const manifest = JSON.parse(fs.readFileSync(manifestPath, 'utf8'));
if (manifest.sourceSha !== null) assertExpectedSourceSha(manifest.sourceSha);
Iif (!Array.isArray(manifest.files) || !manifest.files.length) {
throw new Error('SCS assembly provenance manifest has no files.');
}
if (publicationMap && manifest.filesJsonSha256 !== sha256(publicationMap)) {
throw new Error('SCS assembly provenance does not match scs/files.json.');
}
if (expectedPaths) {
const manifestPaths = new Set(manifest.files.map((file) => file.path));
if (
manifestPaths.size !== expectedPaths.length ||
expectedPaths.some((filePath) => !manifestPaths.has(filePath))
) {
throw new Error('SCS assembly provenance does not cover the SCS publication map.');
}
}
for (const file of manifest.files) {
if (file.sourceSha !== null) assertExpectedSourceSha(file.sourceSha);
const destinationPath = path.resolve(destinationRoot, file.path);
resolveReceiptFile({ receipt: file, receiptRoot: destinationRoot, sourcePath: destinationPath });
assertSafeDestinationPath({ destinationRoot, destinationPath, trustedRoot });
if (sha256(fs.readFileSync(destinationPath)) !== file.sha256) {
throw new Error(`Assembled SCS artifact ${file.path} does not match assembly provenance SHA-256.`);
}
}
return manifest;
}
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