Master (#1262)

* clear

* feat: Add everything

* fix: Commenht

web/auth/src/app/api/oidc/jwks/route.ts

@@ -0,0 +1,158 @@
+import { type NextRequest, NextResponse } from 'next/server';
+
+const BRIDGE_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8080';
+
+interface JWK {
+  kty: string;
+  use?: string;
+  kid: string;
+  alg?: string;
+  n?: string; // RSA modulus
+  e?: string; // RSA exponent
+  x?: string; // EC x coordinate
+  y?: string; // EC y coordinate
+  crv?: string; // EC curve
+}
+
+interface JWKSet {
+  keys: JWK[];
+}
+
+/**
+ * GET /api/oidc/jwks
+ *
+ * OIDC JSON Web Key Set (JWKS) endpoint that returns public keys used for token verification.
+ * This endpoint proxies the request to the Go bridge handler at /oidc/jwks.
+ * The returned keys are used by relying parties to verify JWT tokens issued by this OIDC provider.
+ */
+export async function GET(request: NextRequest): Promise<NextResponse> {
+  try {
+    // Forward the request to the Go bridge handler
+    const response = await fetch(`${BRIDGE_URL}/oidc/jwks`, {
+      method: 'GET',
+      headers: {
+        Accept: 'application/json',
+        'User-Agent': request.headers.get('User-Agent') || '',
+        Origin: request.headers.get('Origin') || '',
+      },
+    });
+
+    if (!response.ok) {
+      console.error('OIDC JWKS error:', response.status, response.statusText);
+
+      let errorData;
+      try {
+        errorData = await response.json();
+      } catch {
+        errorData = {
+          error: 'server_error',
+          error_description: 'Failed to retrieve JSON Web Key Set',
+        };
+      }
+
+      return NextResponse.json(errorData, { status: response.status });
+    }
+
+    const jwks: JWKSet = await response.json();
+
+    // Validate JWKS structure
+    if (!jwks || !Array.isArray(jwks.keys)) {
+      console.error('Invalid JWKS response structure:', jwks);
+      return NextResponse.json(
+        {
+          error: 'server_error',
+          error_description: 'Invalid JWKS response from server',
+        },
+        { status: 500 }
+      );
+    }
+
+    // Validate each key in the set
+    const validKeys = jwks.keys.filter((key: JWK) => {
+      // Basic validation for required JWK fields
+      if (!key.kty || !key.kid) {
+        console.warn('Invalid JWK missing required fields:', key);
+        return false;
+      }
+
+      // Validate key type specific fields
+      if (key.kty === 'RSA' && (!key.n || !key.e)) {
+        console.warn('Invalid RSA JWK missing n or e:', key);
+        return false;
+      }
+
+      if (key.kty === 'EC' && (!key.x || !key.y || !key.crv)) {
+        console.warn('Invalid EC JWK missing x, y, or crv:', key);
+        return false;
+      }
+
+      return true;
+    });
+
+    const validatedJWKS: JWKSet = {
+      keys: validKeys,
+    };
+
+    // Return the JWKS with appropriate headers
+    return NextResponse.json(validatedJWKS, {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/json',
+        // JWKS can be cached longer since keys don't change frequently
+        'Cache-Control': 'public, max-age=86400, stale-while-revalidate=43200',
+        'Access-Control-Allow-Origin': '*',
+        'Access-Control-Allow-Methods': 'GET',
+        'Access-Control-Allow-Headers': 'Content-Type',
+        // Security headers for key endpoint
+        'X-Content-Type-Options': 'nosniff',
+        'X-Frame-Options': 'DENY',
+      },
+    });
+  } catch (error) {
+    console.error('OIDC JWKS proxy error:', error);
+    return NextResponse.json(
+      {
+        error: 'server_error',
+        error_description: 'Internal server error during JWKS retrieval',
+      },
+      { status: 500 }
+    );
+  }
+}
+
+/**
+ * OPTIONS /api/oidc/jwks
+ *
+ * Handle preflight CORS requests for the JWKS endpoint.
+ */
+export async function OPTIONS(): Promise<NextResponse> {
+  return new NextResponse(null, {
+    status: 200,
+    headers: {
+      'Access-Control-Allow-Origin': '*',
+      'Access-Control-Allow-Methods': 'GET, OPTIONS',
+      'Access-Control-Allow-Headers': 'Content-Type',
+      'Access-Control-Max-Age': '86400',
+    },
+  });
+}
+
+/**
+ * POST /api/oidc/jwks
+ *
+ * Return method not allowed for POST requests to JWKS endpoint.
+ */
+export async function POST(): Promise<NextResponse> {
+  return NextResponse.json(
+    {
+      error: 'method_not_allowed',
+      error_description: 'POST method not allowed for JWKS endpoint. Use GET.',
+    },
+    {
+      status: 405,
+      headers: {
+        Allow: 'GET, OPTIONS',
+      },
+    }
+  );
+}