__ __ __ __ _____ _ _ _____ _ _ _
| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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const { log } = require('proc-log')
const npmFetch = require('npm-registry-fetch')
const ciInfo = require('ci-info')
const fetch = require('make-fetch-happen')
const npa = require('npm-package-arg')
const libaccess = require('libnpmaccess')
/**
* Handles OpenID Connect (OIDC) token retrieval and exchange for CI environments.
*
* This function is designed to work in Continuous Integration (CI) environments such as GitHub Actions, GitLab, and CircleCI.
* It retrieves an OIDC token from the CI environment, exchanges it for an npm token, and sets the token in the provided configuration for authentication with the npm registry.
*
* This function is intended to never throw, as it mutates the state of the `opts` and `config` objects on success.
* OIDC is always an optional feature, and the function should not throw if OIDC is not configured by the registry.
*
* @see https://github.com/watson/ci-info for CI environment detection.
* @see https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect for GitHub Actions OIDC.
* @see https://circleci.com/docs/openid-connect-tokens/ for CircleCI OIDC.
*/
async function oidc ({ packageName, registry, opts, config }) {
/*
* This code should never run when people try to publish locally on their machines.
* It is designed to execute only in Continuous Integration (CI) environments.
*/
try {
if (!(
/** @see https://github.com/watson/ci-info/blob/v4.2.0/vendors.json#L152 */
ciInfo.GITHUB_ACTIONS ||
/** @see https://github.com/watson/ci-info/blob/v4.2.0/vendors.json#L161C13-L161C22 */
ciInfo.GITLAB ||
/** @see https://github.com/watson/ci-info/blob/v4.2.0/vendors.json#L78 */
ciInfo.CIRCLE
)) {
return undefined
}
/**
* Check if the environment variable `NPM_ID_TOKEN` is set.
* In GitLab CI, the ID token is provided via an environment variable,
* with `NPM_ID_TOKEN` serving as a predefined default. For consistency,
* all supported CI environments are expected to support this variable.
* In contrast, GitHub Actions uses a request-based approach to retrieve the ID token.
* The presence of this token within GitHub Actions will override the request-based approach.
* This variable follows the prefix/suffix convention from sigstore (e.g., `SIGSTORE_ID_TOKEN`).
* @see https://docs.sigstore.dev/cosign/signing/overview/
*/
let idToken = process.env.NPM_ID_TOKEN
if (!idToken && ciInfo.GITHUB_ACTIONS) {
/**
* GitHub Actions provides these environment variables:
* - `ACTIONS_ID_TOKEN_REQUEST_URL`: The URL to request the ID token.
* - `ACTIONS_ID_TOKEN_REQUEST_TOKEN`: The token to authenticate the request.
* Only when a workflow has the following permissions:
* ```
* permissions:
* id-token: write
* ```
* @see https://docs.github.com/en/actions/security-for-github-actions/security-hardening-your-deployments/configuring-openid-connect-in-cloud-providers#adding-permissions-settings
*/
if (!(
process.env.ACTIONS_ID_TOKEN_REQUEST_URL &&
process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN
)) {
log.silly('oidc', 'Skipped because incorrect permissions for id-token within GitHub workflow')
return undefined
}
/**
* The specification for an audience is `npm:registry.npmjs.org`, where "registry.npmjs.org" can be any supported registry.
*/
const audience = `npm:${new URL(registry).hostname}`
const url = new URL(process.env.ACTIONS_ID_TOKEN_REQUEST_URL)
url.searchParams.append('audience', audience)
const startTime = Date.now()
const response = await fetch(url.href, {
retry: opts.retry,
headers: {
Accept: 'application/json',
Authorization: `Bearer ${process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN}`,
},
})
const elapsedTime = Date.now() - startTime
log.http(
'fetch',
`GET ${url.href} ${response.status} ${elapsedTime}ms`
)
const json = await response.json()
if (!response.ok) {
log.verbose('oidc', `Failed to fetch id_token from GitHub: received an invalid response`)
return undefined
}
if (!json.value) {
log.verbose('oidc', `Failed to fetch id_token from GitHub: missing value`)
return undefined
}
idToken = json.value
}
if (!idToken) {
log.silly('oidc', 'Skipped because no id_token available')
return undefined
}
const parsedRegistry = new URL(registry)
const regKey = `//${parsedRegistry.host}${parsedRegistry.pathname}`
const authTokenKey = `${regKey}:_authToken`
const escapedPackageName = npa(packageName).escapedName
let response
try {
response = await npmFetch.json(new URL(`/-/npm/v1/oidc/token/exchange/package/${escapedPackageName}`, registry), {
...opts,
[authTokenKey]: idToken, // Use the idToken as the auth token for the request
method: 'POST',
})
} catch (error) {
log.verbose('oidc', `Failed token exchange request with body message: ${error?.body?.message || 'Unknown error'}`)
return undefined
}
if (!response?.token) {
log.verbose('oidc', 'Failed because token exchange was missing the token in the response body')
return undefined
}
/*
* The "opts" object is a clone of npm.flatOptions and is passed through the `publish` command, eventually reaching `otplease`.
* To ensure the token is accessible during the publishing process, it must be directly attached to the `opts` object.
* Additionally, the token is required by the "live" configuration or getters within `config`.
*/
opts[authTokenKey] = response.token
config.set(authTokenKey, response.token, 'user')
log.verbose('oidc', `Successfully retrieved and set token`)
try {
const isDefaultProvenance = config.isDefault('provenance')
// CircleCI doesn't support provenance yet, so skip the auto-enable logic
if (isDefaultProvenance && !ciInfo.CIRCLE) {
const [headerB64, payloadB64] = idToken.split('.')
if (headerB64 && payloadB64) {
const payloadJson = Buffer.from(payloadB64, 'base64').toString('utf8')
const payload = JSON.parse(payloadJson)
if (
(ciInfo.GITHUB_ACTIONS && payload.repository_visibility === 'public') ||
// only set provenance for gitlab if the repo is public and SIGSTORE_ID_TOKEN is available
(ciInfo.GITLAB && payload.project_visibility === 'public' && process.env.SIGSTORE_ID_TOKEN)
) {
const visibility = await libaccess.getVisibility(packageName, opts)
if (visibility?.public) {
log.verbose('oidc', `Enabling provenance`)
opts.provenance = true
config.set('provenance', true, 'user')
}
}
}
}
} catch (error) {
log.verbose('oidc', `Failed to set provenance with message: ${error?.message || 'Unknown error'}`)
}
} catch (error) {
log.verbose('oidc', `Failure with message: ${error?.message || 'Unknown error'}`)
}
return undefined
}
module.exports = {
oidc,
}