[Add] is authZ|implict grant type

.gitignore

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LICENSE

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+MIT License
+
+Copyright (c) 2024 [Author]
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

caido.config.ts

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+import { defineConfig } from "@caido-community/dev";
+
+export default defineConfig({
+  id: "caido-oauth",
+  name: "Caido OAuth",
+  description: "Plugin for OAuth",
+  version: "0.0.0",
+  author: {
+    name: "WHS Safe Us Team",
+  },
+  plugins: [
+    {
+      kind: "backend",
+      id: "backend",
+      root: "packages/backend",
+    },
+  ],
+});

package.json

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+{
+  "name": "caido-oauth",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "typecheck": "pnpm -r typecheck",
+    "build": "caido-dev build",
+    "watch": "caido-dev watch"
+  },
+  "devDependencies": {
+    "@caido-community/dev": "^0.1.3",
+    "typescript": "5.5.4"
+  }
+}

packages/backend/package.json

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+{
+  "name": "backend",
+  "version": "0.0.0",
+  "type": "module",
+  "types": "src/index.ts",
+  "scripts": {
+    "typecheck": "tsc --noEmit",
+    "build": "vite build"
+  },
+  "devDependencies": {
+    "@caido/sdk-backend": "^0.46.0"
+  }
+}

packages/backend/src/controller/authZCodeGrant.ts

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+import type { Request } from "caido:utils";
+
+export class AuthZCodeGrantController {
+  constructor() {}
+
+  isAuthZReq(req: Request) {
+    // const path = req.getPath();
+    const query = req.getQuery();
+    // const raw = req.getRaw().toString();
+
+    // 쿼리에 client_id and response_type=code 포함 확인
+    if (query.includes("client_id=") && query.includes("response_type=code")) {
+      return true;
+    }
+
+    return false;
+  }
+
+  isSendCodeToClient(req: Request) {
+    const path = req.getPath();
+    const query = req.getQuery();
+
+    // code & state 쌍 또는 path에 &code= 또는 쿼리로 code= 유사 일치 확인
+    if (
+      (query.includes("code=") && query.includes("state=")) ||
+      path.includes("&code=") ||
+      /code=%/i.test(query)
+    ) {
+      return true;
+    }
+
+    return false;
+  }
+
+  testReq(req: Request) {
+    if (this.isAuthZReq(req)) {
+      return "isAuthZReq";
+    }
+    if (this.isSendCodeToClient(req)) {
+      return "isSendCodeToClient";
+    }
+    return false;
+  }
+
+  // isAccessTokenReq(req: Response) {
+
+  // }
+}

packages/backend/src/controller/implictGrant.ts

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+import type { Request } from "caido:utils";
+
+export class ImplicitGrantController {
+  isImplicitGrantReq(req: Request) {
+    const query = req.getQuery();
+    // const raw = req.getRaw().toString();
+
+    // 쿼리에 client_id and response_type=token 포함 확인
+    if (query.includes("client_id=") && query.includes("response_type=token")) {
+      return true;
+    }
+
+    return false;
+  }
+
+  isSendTokenToClient(req: Request) {
+    const path = req.getPath();
+    const query = req.getQuery();
+
+    if (
+      (query.includes("access_token=") && query.includes("state=")) ||
+      path.includes("&access_token=") ||
+      /access_token=%/i.test(query)
+    ) {
+      return true;
+    }
+
+    return false;
+  }
+
+  testReq(req: Request) {
+    if (this.isImplicitGrantReq(req)) {
+      return "isImplicitGrantReq";
+    }
+    if (this.isSendTokenToClient(req)) {
+      return "isSendTokenToClient";
+    }
+    return false;
+  }
+}

packages/backend/src/index.ts

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+import type { SDK, DefineAPI } from "caido:plugin";
+import type { Request } from "caido:utils";
+import { ImplicitGrantController } from "./controller/implictGrant";
+import { AuthZCodeGrantController } from "./controller/authZCodeGrant";
+
+export type API = DefineAPI<{}>;
+
+const implicitGrantController = new ImplicitGrantController();
+const authZCodeGrantController = new AuthZCodeGrantController();
+
+// function matchSSORequest(req: Request): boolean {
+//   const raw = req.getRaw().toString();
+
+//   // 조건 3: Raw request에 SAMLRequest 또는 SAMLResponse 포함
+//   if (raw.includes("SAMLRequest=") || raw.includes("SAMLResponse=")) {
+//     return true;
+//   }
+
+//   return false;
+// }
+
+// function matchAccessTokenResponse(resp: Response): boolean {
+//   const raw = resp.getRaw().toString();
+
+//   const match = /"access_token"\s*:\s*"([^"]+)"/.exec(raw);
+//   return !!match;
+// }
+
+export function init(sdk: SDK<API>) {
+  sdk.events.onInterceptRequest(async (sdk, req: Request) => {
+    const result =
+      authZCodeGrantController.testReq(req) ||
+      implicitGrantController.testReq(req);
+
+    if (result) {
+      await sdk.findings.create({
+        title: "Possible SSO Request Detected",
+        description: `SSO-related parameters detected in request:\n\n${req.getMethod()} ${req.getUrl()} : ${result}`,
+        request: req,
+        reporter: "",
+      });
+    }
+  });
+}

packages/backend/tsconfig.json

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+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "types": ["@caido/sdk-backend"]
+  },
+  "include": ["./src/**/*.ts"]
+}

pnpm-workspace.yaml

@@ -0,0 +1,2 @@
+packages:
+  - 'packages/*'

tsconfig.json

@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "target": "esnext",
+    "module": "esnext",
+    "lib": ["ESNext"],
+
+    "jsx": "preserve",
+    "noImplicitAny": true,
+    "noUncheckedIndexedAccess": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+
+    "moduleResolution": "bundler",
+    "esModuleInterop": true,
+    "sourceMap": true,
+    "noUnusedLocals": true,
+
+    "useDefineForClassFields": true,
+    "isolatedModules": true,
+
+    "baseUrl": "."
+  }
+}