Recreate RP if its redirect URI is different.

Fixes #54.

Author: RubenVerborgh

flow-typed/lib-defs.js

@@ -5,6 +5,7 @@ declare module 'auth-header' {
 declare module '@solid/oidc-rp' {
   declare export default class RelyingParty {
     provider: { url: string },
+    registration: { redirect_uris: Array<String> },
     static from(data: Object): Promise<RelyingParty>,
     static register(
       issuer: string,

src/webid-oidc.js

@@ -71,8 +71,15 @@ export async function getRegisteredRp(
   idp: string,
   options: loginOptions
 ): Promise<RelyingParty> {
+  // To reuse a possible previous RP,
+  // it be for the same IDP and redirect URI
   let rp = await getStoredRp(options.storage)
-  if (!rp || rp.provider.url !== idp) {
+  if (
+    !rp ||
+    rp.provider.url !== idp ||
+    !rp.registration.redirect_uris.includes(options.callbackUri)
+  ) {
+    // Register a new RP
     rp = await registerRp(idp, options)
     await storeRp(options.storage, idp, rp)
   }