feat: add xsuaa provider

* feat: add XSUAA OAuth provider

* feat: integrate XSUAA provider

* docs: add XSUAA provider

* feat: add XSUAA provider to playground

This is not tested

* chore: use $fetch

* [autofix.ci] apply automated fixes

* Update playground/.env.example

---------

Co-authored-by: Jan Fröhlich <[email protected]>
Co-authored-by: Sébastien Chopin <[email protected]>
Co-authored-by: Sébastien Chopin <[email protected]>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

README.md

@@ -15,7 +15,7 @@ Add Authentication to Nuxt applications with secured & sealed cookies sessions.
 ## Features
 
 - [Hybrid Rendering](#hybrid-rendering) support (SSR / CSR / SWR / Prerendering)
-- [15 OAuth Providers](#supported-oauth-providers)
+- [15+ OAuth Providers](#supported-oauth-providers)
 - [Vue composable](#vue-composable)
 - [Server utils](#server-utils)
 - [`<AuthState>` component](#authstate-component)
@@ -165,6 +165,7 @@ It can also be set using environment variables:
 - Steam
 - Twitch
 - X (Twitter)
+- XSUAA
 
 You can add your favorite provider by creating a new file in [src/runtime/server/lib/oauth/](./src/runtime/server/lib/oauth/).
 

playground/.env.example

@@ -49,3 +49,7 @@ NUXT_OAUTH_STEAM_API_KEY=
 # X
 NUXT_OAUTH_X_CLIENT_ID=
 NUXT_OAUTH_X_CLIENT_SECRET=
+# XSUAA
+NUXT_OAUTH_XSUAA_CLIENT_ID=
+NUXT_OAUTH_XSUAA_CLIENT_SECRET=
+NUXT_OAUTH_XSUAA_DOMAIN=

playground/app.vue

@@ -119,6 +119,12 @@ const providers = computed(() => [
     disabled: Boolean(user.value?.x),
     icon: 'i-simple-icons-x',
   },
+  {
+    label: user.value?.xsuaa || 'XSUAA',
+    to: '/auth/xsuaa',
+    disabled: Boolean(user.value?.xsuaa),
+    icon: 'i-simple-icons-sap',
+  },
 ].map(p => ({
   ...p,
   prefetch: false,

playground/auth.d.ts

@@ -16,6 +16,7 @@ declare module '#auth-utils' {
     paypal?: string
     steam?: string
     x?: string
+    xsuaa?: string
   }
 
   interface UserSession {

playground/server/routes/auth/xsuaa.get.ts

@@ -0,0 +1,12 @@
+export default oauth.xsuaaEventHandler({
+  async onSuccess(event, { user }) {
+    await setUserSession(event, {
+      user: {
+        xsuaa: user.email,
+      },
+      loggedInAt: Date.now(),
+    })
+
+    return sendRedirect(event, '/')
+  },
+})

src/module.ts

@@ -146,5 +146,11 @@ export default defineNuxtModule<ModuleOptions>({
       clientId: '',
       clientSecret: '',
     })
+    // XSUAA OAuth
+    runtimeConfig.oauth.xsuaa = defu(runtimeConfig.oauth.xsuaa, {
+      clientId: '',
+      clientSecret: '',
+      domain: '',
+    })
   },
 })

src/runtime/server/lib/oauth/xsuaa.ts

@@ -0,0 +1,110 @@
+import type { H3Event } from 'h3'
+import { eventHandler, createError, getQuery, getRequestURL, sendRedirect } from 'h3'
+import { withQuery, parsePath } from 'ufo'
+import { defu } from 'defu'
+import { useRuntimeConfig } from '#imports'
+import type { OAuthConfig } from '#auth-utils'
+
+export interface OAuthXSUAAConfig {
+  /**
+   * XSUAA OAuth Client ID
+   * @default process.env.NUXT_OAUTH_XSUAA_CLIENT_ID
+   */
+  clientId?: string
+  /**
+   * XSUAA OAuth Client Secret
+   * @default process.env.NUXT_OAUTH_XSUAA_CLIENT_SECRET
+   */
+  clientSecret?: string
+  /**
+   * XSUAA OAuth Issuer
+   * @default process.env.NUXT_OAUTH_XSUAA_DOMAIN
+   */
+  domain?: string
+  /**
+   * XSUAA OAuth Scope
+   * @default []
+   * @see https://sap.github.io/cloud-sdk/docs/java/guides/cloud-foundry-xsuaa-service
+   * @example ['openid']
+   */
+  scope?: string[]
+}
+
+export function xsuaaEventHandler({ config, onSuccess, onError }: OAuthConfig<OAuthXSUAAConfig>) {
+  return eventHandler(async (event: H3Event) => {
+    config = defu(config, useRuntimeConfig(event).oauth?.xsuaa) as OAuthXSUAAConfig
+    const { code } = getQuery(event)
+
+    if (!config.clientId || !config.clientSecret || !config.domain) {
+      const error = createError({
+        statusCode: 500,
+        message: 'Missing NUXT_OAUTH_XSUAA_CLIENT_ID or NUXT_OAUTH_XSUAA_CLIENT_SECRET or NUXT_OAUTH_XSUAA_DOMAIN env variables.',
+      })
+      if (!onError) throw error
+      return onError(event, error)
+    }
+    const authorizationURL = `https://${config.domain}/oauth/authorize`
+    const tokenURL = `https://${config.domain}/oauth/token`
+
+    const redirectUrl = getRequestURL(event).href
+    if (!code) {
+      config.scope = config.scope || []
+      // Redirect to XSUAA Oauth page
+      return sendRedirect(
+        event,
+        withQuery(authorizationURL as string, {
+          response_type: 'code',
+          client_id: config.clientId,
+          redirect_uri: redirectUrl,
+          scope: config.scope.join(' '),
+        }),
+      )
+    }
+
+    // TODO: improve typing
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const tokens: any = await $fetch(
+      tokenURL as string,
+      {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/x-www-form-urlencoded',
+        },
+        body: new URLSearchParams({
+          grant_type: 'authorization_code',
+          client_id: config.clientId,
+          client_secret: config.clientSecret,
+          redirect_uri: parsePath(redirectUrl).pathname,
+          code: `${code}`,
+        }),
+      },
+    ).catch((error) => {
+      return { error }
+    })
+    if (tokens.error) {
+      const error = createError({
+        statusCode: 401,
+        message: `XSUAA login failed: ${tokens.error?.data?.error_description || 'Unknown error'}`,
+        data: tokens,
+      })
+      if (!onError) throw error
+      return onError(event, error)
+    }
+
+    const tokenType = tokens.token_type
+    const accessToken = tokens.access_token
+
+    // TODO: improve typing
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const user: any = await $fetch(`https://${config.domain}/userinfo`, {
+      headers: {
+        Authorization: `${tokenType} ${accessToken}`,
+      },
+    })
+
+    return onSuccess(event, {
+      tokens,
+      user,
+    })
+  })
+}

src/runtime/server/utils/oauth.ts

@@ -13,6 +13,7 @@ import { facebookEventHandler } from '../lib/oauth/facebook'
 import { paypalEventHandler } from '../lib/oauth/paypal'
 import { steamEventHandler } from '../lib/oauth/steam'
 import { xEventHandler } from '../lib/oauth/x'
+import { xsuaaEventHandler } from '../lib/oauth/xsuaa'
 
 export const oauth = {
   githubEventHandler,
@@ -30,4 +31,5 @@ export const oauth = {
   paypalEventHandler,
   steamEventHandler,
   xEventHandler,
+  xsuaaEventHandler,
 }