sso 인증 기능 구현

2026-01-16 13:15:41 +09:00
parent d5179daf57
commit 5d1bad39f2
5 changed files with 455 additions and 42 deletions
--- a/sso-demo/app.js
+++ b/sso-demo/app.js
@@ -1,3 +1,4 @@
+require('dotenv').config();
 const express = require('express');
 const session = require('express-session');
 const path = require('path');
@@ -12,7 +13,7 @@ app.set('view engine', 'ejs');

 // Session middleware setup
 app.use(session({
-    secret: 'a-very-secret-key-that-should-be-in-env-vars', // In production, use environment variables
+    secret: process.env.JWT_SECRET, // In production, use environment variables
    resave: false,
    saveUninitialized: true,
    cookie: { secure: false } // In production, set secure: true if using HTTPS
--- a/sso-demo/middleware/ssoHandler.js
+++ b/sso-demo/middleware/ssoHandler.js
@@ -1,51 +1,120 @@
 const jwt = require('jsonwebtoken');
+const jwksClient = require('jwks-rsa');
 const User = require('../models/user');
+const axios = require('axios');
+
+// Cache for JWKS clients to avoid re-fetching the configuration on every request.
+const jwksClients = {};
+
+// Function to get the JWKS URI from the OIDC discovery endpoint.
+async function getJwksUri(issuer) {
+  try {
+    const discoveryUrl = `${issuer}/.well-known/openid-configuration`;
+    console.log(`Fetching OIDC discovery document from: ${discoveryUrl}`);
+    const response = await axios.get(discoveryUrl);
+    console.log(`Successfully fetched OIDC discovery document. JWKS URI: ${response.data.jwks_uri}`);
+    return response.data.jwks_uri;
+  } catch (error) {
+    console.error('Failed to fetch OIDC discovery document:', error.message);
+    throw new Error('Could not fetch JWKS URI.');
+  }
+}
+
+function fetchKey(client, header, callback) {
+    console.log(`Fetching signing key for kid: ${header.kid}`);
+    client.getSigningKey(header.kid, (err, key) => {
+        if (err) {
+            console.error('Error getting signing key:', err);
+            return callback(err);
+        }
+        const signingKey = key.publicKey || key.rsaPublicKey;
+        console.log('Successfully fetched signing key.');
+        callback(null, signingKey);
+    });
+}
+

 async function ssoHandler(req, res, next) {
-    // 1. Check if the token is in the query parameters
+    console.log('ssoHandler started.');
    const { token } = req.query;

    if (token) {
-        try {
-            // 2. Decode the JWT to get the payload
-            // In a real app, you MUST verify the token signature using jwt.verify()
-            // For this demo, we'll just decode to inspect the payload.
-            const decoded = jwt.decode(token);
+        console.log('Token found in query. Verifying...');
+        const untrustedDecoded = jwt.decode(token, { complete: true });

+        if (!untrustedDecoded) {
+            return res.status(400).send('Invalid token.');
+        }
+
+        const issuer = untrustedDecoded.payload.iss;
+        let client = jwksClients[issuer];
+
+        if (!client) {
+            try {
+                console.log(`Creating new JWKS client for issuer: ${issuer}`);
+                const jwksUri = await getJwksUri(issuer);
+                client = jwksClient({
+                    jwksUri: jwksUri,
+                    cache: true,
+                    rateLimit: true,
+                });
+                jwksClients[issuer] = client;
+            } catch (err) {
+                console.error('Could not create JWKS client.', err);
+                return res.status(500).send('An error occurred during SSO processing due to a configuration error.');
+            }
+        } else {
+            console.log(`Using existing JWKS client for issuer: ${issuer}`);
+        }
+
+        jwt.verify(token, (header, callback) => fetchKey(client, header, callback), { algorithms: ['RS256'] }, async (err, decoded) => {
+            if (err) {
+                console.error('JWT verification failed:', err);
+                return res.status(500).send('An error occurred during SSO processing due to a verification failure.');
+            }
+
+            console.log('JWT verified successfully. Decoded token:', decoded);
+
+            try {
                if (!decoded || !decoded.sub) {
+                    console.error('Invalid token: "sub" claim is missing.');
                    return res.status(400).send('Invalid token: "sub" claim is missing.');
                }

-            // 3. Find user by 'sub' claim
+                console.log(`Looking for user with sso_sub: ${decoded.sub}`);
                let user = await User.findBySsoSub(decoded.sub);

-            // 4. If user doesn't exist, create a new one (auto-registration)
                if (!user) {
+                    console.log('User not found. Creating a new user.');
                    user = await User.createUser({ sso_sub: decoded.sub });
+                    console.log('New user created:', user);
+                } else {
+                    console.log('User found:', user);
                }

-            // 5. Save user information in the session
                req.session.userId = user.id;
+                console.log(`User ID ${user.id} stored in session.`);

-            // 6. Redirect to the same URL without the token parameter
                const redirectUrl = req.path;
+                console.log(`Redirecting to ${redirectUrl}`);
                return res.redirect(redirectUrl);

            } catch (error) {
-            console.error('SSO handling failed:', error);
-            return res.status(500).send('An error occurred during SSO processing.');
+                console.error('Error during user lookup or creation:', error);
+                return res.status(500).send('An error occurred during user processing.');
            }
-    }
-
-    // Attach user to request if session exists
+        });
+    } else {
+        console.log('No token in query. Proceeding to next middleware.');
        if (req.session.userId) {
+            console.log(`Session found for user ID: ${req.session.userId}`);
            res.locals.user = await User.findById(req.session.userId);
        } else {
+            console.log('No session found.');
            res.locals.user = null;
        }
-
-
        return next();
+    }
 }

 module.exports = ssoHandler;
--- a/sso-demo/package-lock.json
+++ b/sso-demo/package-lock.json
@@ -9,13 +9,138 @@
      "version": "1.0.0",
      "license": "ISC",
      "dependencies": {
+        "axios": "^1.13.2",
+        "dotenv": "^17.2.3",
        "ejs": "^4.0.1",
        "express": "^5.2.1",
        "express-session": "^1.18.2",
        "jsonwebtoken": "^9.0.3",
+        "jwks-rsa": "^3.2.0",
        "nodemon": "^3.1.11"
      }
    },
+    "node_modules/@types/body-parser": {
+      "version": "1.19.6",
+      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.6.tgz",
+      "integrity": "sha512-HLFeCYgz89uk22N5Qg3dvGvsv46B8GLvKKo1zKG4NybA8U2DiEO3w9lqGg29t/tfLRJpJ6iQxnVw4OnB7MoM9g==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/connect": "*",
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/connect": {
+      "version": "3.4.38",
+      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.38.tgz",
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+      "license": "MIT",
+      "dependencies": {
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+      "dependencies": {
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+        "@types/qs": "*",
+        "@types/serve-static": "^1"
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+      "license": "MIT",
+      "dependencies": {
+        "@types/http-errors": "*",
+        "@types/node": "*",
+        "@types/send": "<1"
+      }
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+    "node_modules/@types/serve-static/node_modules/@types/send": {
+      "version": "0.17.6",
+      "resolved": "https://registry.npmjs.org/@types/send/-/send-0.17.6.tgz",
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+      "dependencies": {
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+        "form-data": "^4.0.4",
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@@ -179,6 +321,18 @@
        "fsevents": "~2.3.2"
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+    "node_modules/combined-stream": {
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+      "license": "MIT",
+      "dependencies": {
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+      },
+      "engines": {
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@@ -242,6 +396,15 @@
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+    "node_modules/delayed-stream": {
+      "version": "1.0.0",
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+      "engines": {
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@@ -251,6 +414,18 @@
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+    "node_modules/dotenv": {
+      "version": "17.2.3",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.2.3.tgz",
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+      "funding": {
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+      }
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@@ -334,6 +509,21 @@
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+      "version": "2.1.0",
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+        "has-tostringtag": "^1.0.2",
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@@ -474,6 +664,63 @@
        "url": "https://opencollective.com/express"
      }
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+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://github.com/sponsors/RubenVerborgh"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=4.0"
+      },
+      "peerDependenciesMeta": {
+        "debug": {
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@@ -597,6 +844,21 @@
        "url": "https://github.com/sponsors/ljharb"
      }
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+      "license": "MIT",
+      "dependencies": {
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+        "node": ">= 0.4"
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@@ -731,6 +993,15 @@
        "node": ">=10"
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+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
    "node_modules/jsonwebtoken": {
      "version": "9.0.3",
      "resolved": "https://registry.npmjs.org/jsonwebtoken/-/jsonwebtoken-9.0.3.tgz",
@@ -764,6 +1035,23 @@
        "safe-buffer": "^5.0.1"
      }
    },
+    "node_modules/jwks-rsa": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/jwks-rsa/-/jwks-rsa-3.2.0.tgz",
+      "integrity": "sha512-PwchfHcQK/5PSydeKCs1ylNym0w/SSv8a62DgHJ//7x2ZclCoinlsjAfDxAAbpoTPybOum/Jgy+vkvMmKz89Ww==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/express": "^4.17.20",
+        "@types/jsonwebtoken": "^9.0.4",
+        "debug": "^4.3.4",
+        "jose": "^4.15.4",
+        "limiter": "^1.1.5",
+        "lru-memoizer": "^2.2.0"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
    "node_modules/jws": {
      "version": "4.0.1",
      "resolved": "https://registry.npmjs.org/jws/-/jws-4.0.1.tgz",
@@ -774,6 +1062,17 @@
        "safe-buffer": "^5.0.1"
      }
    },
+    "node_modules/limiter": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/limiter/-/limiter-1.1.5.tgz",
+      "integrity": "sha512-FWWMIEOxz3GwUI4Ts/IvgVy6LPvoMPgjMdQ185nN6psJyBJ4yOpzqm695/h5umdLJg2vW3GR5iG11MAkR2AzJA=="
+    },
+    "node_modules/lodash.clonedeep": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz",
+      "integrity": "sha512-H5ZhCF25riFd9uB5UCkVKo61m3S/xZk1x4wA6yp/L3RFP6Z/eHH1ymQcGLo7J3GMPfm0V/7m1tryHuGVxpqEBQ==",
+      "license": "MIT"
+    },
    "node_modules/lodash.includes": {
      "version": "4.3.0",
      "resolved": "https://registry.npmjs.org/lodash.includes/-/lodash.includes-4.3.0.tgz",
@@ -816,6 +1115,28 @@
      "integrity": "sha512-Sb487aTOCr9drQVL8pIxOzVhafOjZN9UU54hiN8PU3uAiSV7lx1yYNpbNmex2PK6dSJoNTSJUUswT651yww3Mg==",
      "license": "MIT"
    },
+    "node_modules/lru-cache": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
+      "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+      "license": "ISC",
+      "dependencies": {
+        "yallist": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/lru-memoizer": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/lru-memoizer/-/lru-memoizer-2.3.0.tgz",
+      "integrity": "sha512-GXn7gyHAMhO13WSKrIiNfztwxodVsP8IoZ3XfrJV4yH2x0/OeTO/FIaAHTY5YekdGgW94njfuKmyyt1E0mR6Ug==",
+      "license": "MIT",
+      "dependencies": {
+        "lodash.clonedeep": "^4.5.0",
+        "lru-cache": "6.0.0"
+      }
+    },
    "node_modules/math-intrinsics": {
      "version": "1.1.0",
      "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -1049,6 +1370,12 @@
        "node": ">= 0.10"
      }
    },
+    "node_modules/proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==",
+      "license": "MIT"
+    },
    "node_modules/pstree.remy": {
      "version": "1.1.8",
      "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz",
@@ -1387,6 +1714,12 @@
      "integrity": "sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==",
      "license": "MIT"
    },
+    "node_modules/undici-types": {
+      "version": "7.16.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
+      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
+      "license": "MIT"
+    },
    "node_modules/unpipe": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
@@ -1410,6 +1743,12 @@
      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
      "license": "ISC"
+    },
+    "node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+      "license": "ISC"
    }
  }
 }
--- a/sso-demo/package.json
+++ b/sso-demo/package.json
@@ -11,10 +11,13 @@
  "author": "",
  "license": "ISC",
  "dependencies": {
+    "axios": "^1.13.2",
+    "dotenv": "^17.2.3",
    "ejs": "^4.0.1",
    "express": "^5.2.1",
    "express-session": "^1.18.2",
    "jsonwebtoken": "^9.0.3",
+    "jwks-rsa": "^3.2.0",
    "nodemon": "^3.1.11"
  }
 }
--- a/sso-demo/public/js/sso.js
+++ b/sso-demo/public/js/sso.js
@@ -4,7 +4,7 @@ document.addEventListener('DOMContentLoaded', () => {
    if (ssoLoginButton) {
        ssoLoginButton.addEventListener('click', () => {
            // Open the SSO provider's login page in a popup
-            const ssoUrl = '/sso_popup.html'; // This is our simulated SSO provider
+            const ssoUrl = 'https://sso.hmac.kr/'; // Real SSO provider URL
            const popupWidth = 500;
            const popupHeight = 600;
            const left = (screen.width / 2) - (popupWidth / 2);
@@ -18,10 +18,11 @@ document.addEventListener('DOMContentLoaded', () => {

            // Listen for a message from the popup
            window.addEventListener('message', (event) => {
-                // IMPORTANT: In a real app, verify the origin of the message for security
-                // if (event.origin !== 'https://your-sso-provider.com') {
-                //     return;
-                // }
+                // IMPORTANT: Verify the origin of the message for security
+                if (event.origin !== 'https://sso.hmac.kr') {
+                    console.warn('Received message from untrusted origin:', event.origin);
+                    return;
+                }

                // Check if the message contains the expected data structure
                if (event.data && event.data.type === 'LOGIN_SUCCESS' && event.data.token) {