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@actions/attest Support multiple subjects #1749

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2 changes: 1 addition & 1 deletion packages/attest/__tests__/intoto.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ describe('buildIntotoStatement', () => {
}

it('returns an intoto statement', () => {
const statement = buildIntotoStatement(subject, predicate)
const statement = buildIntotoStatement([subject], predicate)
expect(statement).toMatchSnapshot()
})
})
20 changes: 18 additions & 2 deletions packages/attest/__tests__/provenance.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import nock from 'nock'
import {MockAgent, setGlobalDispatcher} from 'undici'
import {SIGSTORE_PUBLIC_GOOD, signingEndpoints} from '../src/endpoints'
import {attestProvenance, buildSLSAProvenancePredicate} from '../src/provenance'
import type {Subject} from '../src/shared.types'

describe('provenance functions', () => {
const originalEnv = process.env
Expand Down Expand Up @@ -79,6 +80,22 @@ describe('provenance functions', () => {
sha256: '7d070f6b64d9bcc530fe99cc21eaaa4b3c364e0b2d367d7735671fa202a03b32'
}

const subjects: Subject[] = [
{
name: 'subjective',
digest: {
sha256:
'7d070f6b64d9bcc530fe99cc21eaaa4b3c364e0b2d367d7735671fa202a03b32'
}
},
{
name: 'subject_two',
digest: {
gitcommit: 'c6b487124a61d7dc6c7bd6ea0208368af3513a6e'
}
}
]

// Fake an OIDC token
const oidcPayload = {sub: '[email protected]', iss: ''}
const oidcToken = `.${Buffer.from(JSON.stringify(oidcPayload)).toString(
Expand Down Expand Up @@ -114,8 +131,7 @@ describe('provenance functions', () => {
describe('when the sigstore instance is explicitly set', () => {
it('attests provenance', async () => {
const attestation = await attestProvenance({
subjectName,
subjectDigest,
subjects,
token: 'token',
sigstore: 'github',
issuer
Expand Down
24 changes: 19 additions & 5 deletions packages/attest/src/attest.ts
Original file line number Diff line number Diff line change
Expand Up @@ -15,10 +15,16 @@ const INTOTO_PAYLOAD_TYPE = 'application/vnd.in-toto+json'
*/
export type AttestOptions = {
// The name of the subject to be attested.
subjectName: string
// @deprecated see 'subjects'
subjectName?: string
// The digest of the subject to be attested. Should be a map of digest
// algorithms to their hex-encoded values.
subjectDigest: Record<string, string>
// @deprecated see 'subjects'
subjectDigest?: Record<string, string>
// The subjects to be attested
// Includes the digest(s) of the subject to be attested. Should be a map of digest
// algorithms to their hex-encoded values.
subjects?: Subject[]
// Content type of the predicate being attested.
predicateType: string
// Predicate to be attested.
Expand All @@ -40,10 +46,18 @@ export type AttestOptions = {
* @returns A promise that resolves to the attestation.
*/
export async function attest(options: AttestOptions): Promise<Attestation> {
const subject: Subject = {
name: options.subjectName,
digest: options.subjectDigest
let subject = [] as Subject[]
if (options.subjects && options.subjects.length > 0) {
subject = options.subjects
} else if (options.subjectName && options.subjectDigest) {
subject = [
{
name: options.subjectName,
digest: options.subjectDigest
}
]
}

const predicate: Predicate = {
type: options.predicateType,
params: options.predicate
Expand Down
4 changes: 2 additions & 2 deletions packages/attest/src/intoto.ts
Original file line number Diff line number Diff line change
Expand Up @@ -20,12 +20,12 @@ export type InTotoStatement = {
* @returns The constructed in-toto statement.
*/
export const buildIntotoStatement = (
subject: Subject,
subject: Subject[],
predicate: Predicate
): InTotoStatement => {
return {
_type: INTOTO_STATEMENT_V1_TYPE,
subject: [subject],
subject,
predicateType: predicate.type,
predicate: predicate.params
}
Expand Down