79 lines
4.1 KiB
JavaScript
79 lines
4.1 KiB
JavaScript
import { FEDERATION_BETA_HEADER, GRANT_TYPE_JWT_BEARER, OAUTH_API_BETA_HEADER, TOKEN_ENDPOINT, WorkloadIdentityError, parseTokenResponse, redactSensitive, requireSecureTokenEndpoint, } from "./types.mjs";
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import { nowAsSeconds } from "../../internal/utils/time.mjs";
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import { VERSION } from "../../version.mjs";
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/**
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* Exchanges an external OIDC JWT for an Anthropic access token via the
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* RFC 7523 jwt-bearer grant.
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*
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* Each invocation performs a fresh token exchange. Wrap in a
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* {@link TokenCache} to avoid exchanging on every request.
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*
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* Federation grants do not return a refresh token — callers re-exchange
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* their assertion on expiry.
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*/
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export function oidcFederationProvider(config) {
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return async () => {
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requireSecureTokenEndpoint(config.baseURL);
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const jwt = await config.identityTokenProvider();
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// The token endpoint enforces a 16 KiB assertion limit; surface a clear
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// client-side error so misconfigured projected-token sources are
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// diagnosable without a server round-trip.
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if (jwt.length > 16 * 1024) {
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throw new WorkloadIdentityError(`Identity token is ${Math.ceil(jwt.length / 1024)} KiB, exceeds the 16 KiB assertion limit`);
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}
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const body = {
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grant_type: GRANT_TYPE_JWT_BEARER,
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assertion: jwt,
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federation_rule_id: config.federationRuleId,
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organization_id: config.organizationId,
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};
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if (config.serviceAccountId) {
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body['service_account_id'] = config.serviceAccountId;
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}
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if (config.workspaceId) {
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body['workspace_id'] = config.workspaceId;
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}
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const url = `${config.baseURL}${TOKEN_ENDPOINT}`;
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let resp;
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try {
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resp = await config.fetch(url, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'anthropic-beta': `${OAUTH_API_BETA_HEADER},${FEDERATION_BETA_HEADER}`,
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'User-Agent': config.userAgent || `anthropic-sdk-typescript/${VERSION} oidcFederationProvider`,
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},
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body: JSON.stringify(body),
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});
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}
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catch (err) {
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throw new WorkloadIdentityError(`Failed to reach token endpoint ${url}: ${err}`);
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}
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const requestId = resp.headers.get('Request-Id');
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if (!resp.ok) {
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const text = await resp.text().catch(() => '');
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const redacted = redactSensitive(text);
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// A 401 is hard to debug from the status code alone, so surface
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// guidance: check the federation rule, optionally set a workspace ID
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// (the most common fix when no workspaceId is configured), and point at
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// the Workload identity page in Claude Console for the server-side
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// authentication event log. Other statuses (5xx, 400, ...) get no hint.
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let hint = '';
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if (resp.status === 401) {
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const hintMiddle = config.workspaceId ? '' : ("If your federation rule is scoped to multiple workspaces, set the ANTHROPIC_WORKSPACE_ID environment variable, the 'workspace_id' config key, or the `workspaceId` option. ");
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hint = ` Ensure your federation rule matches your identity token. ${hintMiddle}View your authentication events in the Workload identity page of Claude Console for more details.`;
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}
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throw new WorkloadIdentityError(`Token exchange failed with status ${resp.status}${requestId ? ` (request-id ${requestId})` : ''}: ${redacted}${hint}`, resp.status, redacted, requestId);
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}
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const data = await parseTokenResponse(resp, requestId);
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const expiresIn = Number(data.expires_in);
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if (!Number.isFinite(expiresIn)) {
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throw new WorkloadIdentityError(`Token endpoint response missing required fields: ${JSON.stringify(redactSensitive(data))}`, resp.status, redactSensitive(data), requestId);
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}
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return {
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token: data.access_token,
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expiresAt: nowAsSeconds() + expiresIn,
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};
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};
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}
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//# sourceMappingURL=oidc-federation.mjs.map
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