mirror of https://github.com/actions/toolkit
110 lines
2.3 KiB
TypeScript
110 lines
2.3 KiB
TypeScript
import {
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Bundle,
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BundleBuilder,
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CIContextProvider,
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DSSEBundleBuilder,
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FulcioSigner,
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RekorWitness,
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TSAWitness,
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Witness
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} from '@sigstore/sign'
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const OIDC_AUDIENCE = 'sigstore'
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const DEFAULT_TIMEOUT = 10000
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const DEFAULT_RETRIES = 3
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/**
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* The payload to be signed (body) and its media type (type).
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*/
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export type Payload = {
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body: Buffer
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type: string
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}
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/**
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* Options for signing a document.
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*/
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export type SignOptions = {
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/**
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* The URL of the Fulcio service.
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*/
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fulcioURL: string
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/**
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* The URL of the Rekor service.
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*/
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rekorURL?: string
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/**
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* The URL of the TSA (Time Stamping Authority) server.
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*/
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tsaServerURL?: string
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/**
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* The timeout duration in milliseconds when communicating with Sigstore
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* services.
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*/
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timeout?: number
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/**
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* The number of retry attempts.
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*/
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retry?: number
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}
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/**
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* Signs the provided payload with a Sigstore-issued certificate and returns the
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* signature bundle.
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* @param payload Payload to be signed.
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* @param options Signing options.
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* @returns A promise that resolves to the Sigstore signature bundle.
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*/
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export const signPayload = async (
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payload: Payload,
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options: SignOptions
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): Promise<Bundle> => {
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const artifact = {
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data: payload.body,
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type: payload.type
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}
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// Sign the artifact and build the bundle
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return initBundleBuilder(options).create(artifact)
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}
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// Assembles the Sigstore bundle builder with the appropriate options
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const initBundleBuilder = (opts: SignOptions): BundleBuilder => {
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const identityProvider = new CIContextProvider(OIDC_AUDIENCE)
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const timeout = opts.timeout || DEFAULT_TIMEOUT
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const retry = opts.retry || DEFAULT_RETRIES
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const witnesses: Witness[] = []
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const signer = new FulcioSigner({
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identityProvider,
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fulcioBaseURL: opts.fulcioURL,
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timeout,
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retry
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})
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if (opts.rekorURL) {
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witnesses.push(
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new RekorWitness({
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rekorBaseURL: opts.rekorURL,
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entryType: 'dsse',
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timeout,
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retry
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})
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)
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}
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if (opts.tsaServerURL) {
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witnesses.push(
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new TSAWitness({
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tsaBaseURL: opts.tsaServerURL,
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timeout,
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retry
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})
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)
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}
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// Build the bundle with the singleCertificate option which will
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// trigger the creation of v0.3 DSSE bundles
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return new DSSEBundleBuilder({signer, witnesses, singleCertificate: true})
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}
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