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JWT extras (#817)

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* JWT extras: check issues, expiration, namespace and tenant

* idents
This commit is contained in:
Matthew Tovbin 2020-08-06 08:44:19 -07:00 committed by GitHub
parent 4596aaf5d5
commit 4c275513b4
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2 changed files with 81 additions and 24 deletions
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34
packages/cli/config/index.ts
View file

@ -333,13 +333,43 @@ const config = convict({
env: 'N8N_JWT_AUTH_HEADER',
doc: 'The request header containing a signed JWT'
},
jwtHeaderValuePrefix: {
format: String,
default: '',
env: 'N8N_JWT_AUTH_HEADER_VALUE_PREFIX',
doc: 'The request header value prefix to strip (optional)'
},
jwksUri: {
format: String,
default: '',
env: 'N8N_JWKS_URI',
doc: 'The URI to fetch JWK Set for JWT auh'
doc: 'The URI to fetch JWK Set for JWT authentication'
},
}
jwtIssuer: {
format: String,
default: '',
env: 'N8N_JWT_ISSUER',
doc: 'JWT issuer to expect (optional)'
},
jwtNamespace: {
format: String,
default: '',
env: 'N8N_JWT_NAMESPACE',
doc: 'JWT namespace to expect (optional)'
},
jwtAllowedTenantKey: {
format: String,
default: '',
env: 'N8N_JWT_ALLOWED_TENANT_KEY',
doc: 'JWT tenant key name to inspect within JWT namespace (optional)'
},
jwtAllowedTenant: {
format: String,
default: '',
env: 'N8N_JWT_ALLOWED_TENANT',
doc: 'JWT tenant to allow (optional)'
},
},
},
endpoints: {

71
packages/cli/src/Server.ts
View file

@ -213,37 +213,64 @@ class App {
const jwtAuthHeader = await GenericHelpers.getConfigValue('security.jwtAuth.jwtHeader') as string;
if (jwtAuthHeader === '') {
throw new Error('JWT auth is activated but no request header was defined. Please set one!');
}
}
const jwksUri = await GenericHelpers.getConfigValue('security.jwtAuth.jwksUri') as string;
if (jwksUri === '') {
throw new Error('JWT auth is activated but no JWK Set URI was defined. Please set one!');
}
}
const jwtHeaderValuePrefix = await GenericHelpers.getConfigValue('security.jwtAuth.jwtHeaderValuePrefix') as string;
const jwtIssuer = await GenericHelpers.getConfigValue('security.jwtAuth.jwtIssuer') as string;
const jwtNamespace = await GenericHelpers.getConfigValue('security.jwtAuth.jwtNamespace') as string;
const jwtAllowedTenantKey = await GenericHelpers.getConfigValue('security.jwtAuth.jwtAllowedTenantKey') as string;
const jwtAllowedTenant = await GenericHelpers.getConfigValue('security.jwtAuth.jwtAllowedTenant') as string;
this.app.use((req: express.Request, res: express.Response, next: express.NextFunction) => {
if (req.url.match(authIgnoreRegex)) {
return next();
}
function isTenantAllowed(decodedToken: object): Boolean {
if (jwtNamespace === '' || jwtAllowedTenantKey === '' || jwtAllowedTenant === '') return true;
else {
for (let [k, v] of Object.entries(decodedToken)) {
if (k === jwtNamespace) {
for (let [kn, kv] of Object.entries(v)) {
if (kn === jwtAllowedTenantKey && kv === jwtAllowedTenant) {
return true;
}
}
}
}
}
return false;
}
const token = req.header(jwtAuthHeader) as string;
if (token === '') {
return ResponseHelper.jwtAuthAuthorizationError(res, "Missing token");
}
this.app.use((req: express.Request, res: express.Response, next: express.NextFunction) => {
if (req.url.match(authIgnoreRegex)) {
return next();
}
const jwkClient = jwks({ cache: true, jwksUri });
function getKey(header: any, callback: Function) { // tslint:disable-line:no-any
jwkClient.getSigningKey(header.kid, (err: Error, key: any) => { // tslint:disable-line:no-any
if (err) throw ResponseHelper.jwtAuthAuthorizationError(res, err.message);
var token = req.header(jwtAuthHeader) as string;
if (token === undefined || token === '') {
return ResponseHelper.jwtAuthAuthorizationError(res, "Missing token");
}
if (jwtHeaderValuePrefix != '' && token.startsWith(jwtHeaderValuePrefix)) {
token = token.replace(jwtHeaderValuePrefix + ' ', '').trimLeft();
}
const signingKey = key.publicKey || key.rsaPublicKey;
callback(null, signingKey);
});
}
const jwkClient = jwks({ cache: true, jwksUri });
function getKey(header: any, callback: Function) { // tslint:disable-line:no-any
jwkClient.getSigningKey(header.kid, (err: Error, key: any) => { // tslint:disable-line:no-any
if (err) throw ResponseHelper.jwtAuthAuthorizationError(res, err.message);
jwt.verify(token, getKey, {}, (err: jwt.VerifyErrors, decoded: object) => {
if (err) return ResponseHelper.jwtAuthAuthorizationError(res, 'Invalid token');
const signingKey = key.publicKey || key.rsaPublicKey;
callback(null, signingKey);
});
}
next();
var jwtVerifyOptions: jwt.VerifyOptions = {
issuer: jwtIssuer != '' ? jwtIssuer : undefined,
ignoreExpiration: false
}
jwt.verify(token, getKey, jwtVerifyOptions, (err: jwt.VerifyErrors, decoded: object) => {
if (err) ResponseHelper.jwtAuthAuthorizationError(res, 'Invalid token');
else if (!isTenantAllowed(decoded)) ResponseHelper.jwtAuthAuthorizationError(res, 'Tenant not allowed');
else next();
});
});
}