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feat(auth): add EMA refresh-token conformance scenario #484

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142 changes: 142 additions & 0 deletions examples/clients/typescript/ema-broken-clients.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,142 @@
/** Broken requests for the optional EMA refresh-token exchange profile. */
import { ClientConformanceContextSchema } from '../../../src/schemas/context.js';

export type EmaRefreshDefect =
| 'ordinary-refresh'
| 'wrong-subject-type'
| 'unknown-refresh-token'
| 'missing-idp-auth'
| 'wrong-idp-auth'
| 'wrong-audience'
| 'wrong-resource'
| 'scope-escalation'
| 'unissued-mcp-token'
| 'invalid-mcp-request'
| 'stops-after-token';

export async function runEmaRefreshBrokenClient(
serverUrl: string,
defect: EmaRefreshDefect
): Promise<{ status: number; body: Record<string, unknown> }> {
const ctx = ClientConformanceContextSchema.parse(
JSON.parse(process.env.MCP_CONFORMANCE_CONTEXT ?? '{}')
);
if (ctx.name !== 'auth/enterprise-managed-authorization-refresh-token') {
throw new Error(`Expected EMA refresh-token context, got ${ctx.name}`);
}

const prm = await (
await fetch(new URL('/.well-known/oauth-protected-resource/mcp', serverUrl))
).json();
const metadata = await (
await fetch(
new URL(
'/.well-known/oauth-authorization-server',
prm.authorization_servers[0]
)
)
).json();
const params = new URLSearchParams({
grant_type: 'urn:ietf:params:oauth:grant-type:token-exchange',
requested_token_type: 'urn:ietf:params:oauth:token-type:id-jag',
subject_token_type: 'urn:ietf:params:oauth:token-type:refresh_token',
subject_token: ctx.idp_refresh_token,
audience: metadata.issuer,
resource: prm.resource,
scope: 'test:read test:write'
});
const headers: Record<string, string> = {
'Content-Type': 'application/x-www-form-urlencoded',
Authorization: basicAuth(ctx.idp_client_id, ctx.idp_client_secret)
};

switch (defect) {
case 'ordinary-refresh':
params.set('grant_type', 'refresh_token');
params.set('refresh_token', ctx.idp_refresh_token);
params.delete('subject_token');
break;
case 'wrong-subject-type':
params.set(
'subject_token_type',
'urn:ietf:params:oauth:token-type:id_token'
);
break;
case 'unknown-refresh-token':
params.set('subject_token', 'unknown-refresh-token');
break;
case 'missing-idp-auth':
delete headers.Authorization;
break;
case 'wrong-idp-auth':
headers.Authorization = basicAuth(ctx.idp_client_id, 'wrong-secret');
break;
case 'wrong-audience':
params.set('audience', 'https://other.example');
break;
case 'wrong-resource':
params.set('resource', 'https://other.example/mcp');
break;
}

let response = await fetch(ctx.idp_token_endpoint, {
method: 'POST',
headers,
body: params
});
let body: Record<string, unknown> = await response.json();
if (
defect === 'scope-escalation' ||
defect === 'unissued-mcp-token' ||
defect === 'invalid-mcp-request' ||
defect === 'stops-after-token'
) {
if (!response.ok || typeof body.access_token !== 'string') {
throw new Error('Expected a valid ID-JAG before the AS exchange');
}
const grantParams = new URLSearchParams({
grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
assertion: body.access_token
});
if (defect === 'scope-escalation') {
grantParams.set('scope', 'test:read test:write');
}
response = await fetch(metadata.token_endpoint, {
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
Authorization: basicAuth(ctx.client_id, ctx.client_secret)
},
body: grantParams
});
body = await response.json();
}
if (defect === 'unissued-mcp-token' || defect === 'invalid-mcp-request') {
if (!response.ok || typeof body.access_token !== 'string') {
throw new Error(
'Expected an issued access token before testing MCP access'
);
}
response = await fetch(serverUrl, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
Accept: 'application/json, text/event-stream',
Authorization: `Bearer ${defect === 'unissued-mcp-token' ? 'test-token-not-issued' : body.access_token}`
},
body: JSON.stringify(
defect === 'invalid-mcp-request'
? {}
: { jsonrpc: '2.0', id: 1, method: 'tools/list', params: {} }
)
});
body = await response.json();
}
return { status: response.status, body };
}

function basicAuth(clientId: string, clientSecret: string): string {
const encode = (value: string) =>
new URLSearchParams([['', value]]).toString().slice(1);
return `Basic ${Buffer.from(`${encode(clientId)}:${encode(clientSecret)}`).toString('base64')}`;
}
56 changes: 45 additions & 11 deletions examples/clients/typescript/everything-client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -770,13 +770,17 @@ registerScenario('auth/pre-registration', runPreRegistration);

/**
* Enterprise-Managed Authorization (SEP-990)
* Tests the complete flow: IDP ID token -> authorization grant -> access token -> MCP access.
* Tests IDP ID-token or refresh-token exchange -> ID-JAG -> access token -> MCP access.
* The refresh-token scenario uses separate IdP credentials and preserves narrowed scope.
*/
export async function runEnterpriseManagedAuthorization(
serverUrl: string
): Promise<void> {
const ctx = parseContext();
if (ctx.name !== 'auth/enterprise-managed-authorization') {
if (
ctx.name !== 'auth/enterprise-managed-authorization' &&
ctx.name !== 'auth/enterprise-managed-authorization-refresh-token'
) {
throw new Error(
`Expected enterprise-managed-authorization context, got ${ctx.name}`
);
Expand Down Expand Up @@ -828,21 +832,42 @@ export async function runEnterpriseManagedAuthorization(
}
logger.debug('Auth server supports jwt-bearer grant type');

// Step 1: Token Exchange at IdP (IDP ID token -> ID-JAG)
logger.debug('Step 1: Exchanging IDP ID token for ID-JAG at IdP...');
// Step 1: Token Exchange at IdP (ID token or refresh token -> ID-JAG)
logger.debug('Step 1: Exchanging the IDP credential for ID-JAG...');
const tokenExchangeParams = new URLSearchParams({
grant_type: 'urn:ietf:params:oauth:grant-type:token-exchange',
requested_token_type: 'urn:ietf:params:oauth:token-type:id-jag',
audience: asIssuer,
resource: resource,
subject_token: ctx.idp_id_token,
subject_token_type: 'urn:ietf:params:oauth:token-type:id_token',
client_id: ctx.idp_client_id
resource: resource
});
const tokenExchangeHeaders: Record<string, string> = {
'Content-Type': 'application/x-www-form-urlencoded'
};
if (ctx.name === 'auth/enterprise-managed-authorization-refresh-token') {
tokenExchangeParams.set('subject_token', ctx.idp_refresh_token);
tokenExchangeParams.set(
'subject_token_type',
'urn:ietf:params:oauth:token-type:refresh_token'
);
const idpBasicAuth = Buffer.from(
`${encodeURIComponent(ctx.idp_client_id)}:${encodeURIComponent(ctx.idp_client_secret)}`
).toString('base64');
tokenExchangeHeaders.Authorization = `Basic ${idpBasicAuth}`;
if (prm.scopes_supported?.length) {
tokenExchangeParams.set('scope', prm.scopes_supported.join(' '));
}
} else {
tokenExchangeParams.set('subject_token', ctx.idp_id_token);
tokenExchangeParams.set(
'subject_token_type',
'urn:ietf:params:oauth:token-type:id_token'
);
tokenExchangeParams.set('client_id', ctx.idp_client_id);
}

const tokenExchangeResponse = await fetch(ctx.idp_token_endpoint, {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
headers: tokenExchangeHeaders,
body: tokenExchangeParams
});

Expand All @@ -863,6 +888,12 @@ export async function runEnterpriseManagedAuthorization(
grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
assertion: idJag
});
if (
ctx.name === 'auth/enterprise-managed-authorization-refresh-token' &&
typeof tokenExchangeResult.scope === 'string'
) {
jwtBearerParams.set('scope', tokenExchangeResult.scope);
}

const basicAuth = Buffer.from(
`${encodeURIComponent(ctx.client_id)}:${encodeURIComponent(ctx.client_secret)}`
Expand Down Expand Up @@ -913,8 +944,11 @@ export async function runEnterpriseManagedAuthorization(
logger.debug('Enterprise-managed authorization flow completed successfully');
}

registerScenario(
'auth/enterprise-managed-authorization',
registerScenarios(
[
'auth/enterprise-managed-authorization',
'auth/enterprise-managed-authorization-refresh-token'
],
runEnterpriseManagedAuthorization
);

Expand Down
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