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index.js
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index.js
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// vim: ts=4 sw=4 et ai
require('dotenv').config();
const { Sequelize, DataTypes } = require('sequelize');
/* Definitions */
const ECCS_HOSTED_DOMAIN = 'g.ecc.u-tokyo.ac.jp';
const ECCS_ID_PATTERN = /^([0-9]{10})@g\.ecc\.u-tokyo\.ac\.jp$/;
const {
MARIADB_DB,
MARIADB_USER,
MARIADB_PASS,
} = process.env;
const sequelize = new Sequelize(MARIADB_DB, MARIADB_USER, MARIADB_PASS, {
host: 'localhost',
dialect: 'mariadb',
});
const User = sequelize.define('User', {
// SAEC Account ID
userId: {
type: DataTypes.UUID,
allowNull: false,
defaultValue: DataTypes.UUIDV4,
unique: true,
},
// UTokyo Account ID (10 digits)
eccsId: {
type: DataTypes.STRING,
allowNull: true,
},
// Student ID
studentId: {
type: DataTypes.STRING,
allowNull: true,
},
// This is not unique.
userName: {
type: DataTypes.STRING,
allowNull: true,
},
// milliseconds since UNIX epoch
eccsTimestamp: {
type: DataTypes.DOUBLE,
allowNull: true,
},
emailAddress: {
type: DataTypes.STRING,
allowNull: true,
},
}, {});
sequelize.sync({alter: true}).then(() => {
console.log('Database synced');
}).catch((e) => {
console.error('Database sync failed');
});
const DOMAIN = 'u-tokyo.app.';
const sign = (data) => {
const hmac = crypto.createHmac('sha256', process.env.SESSION_KEY);
hmac.update(data);
return hmac.digest('hex');
};
const crypto = require('crypto');
const Koa = require('koa');
const Router = require('@koa/router');
const app = new Koa();
const router = new Router();
const {google} = require('googleapis');
const oauth2Client = new google.auth.OAuth2(
process.env.GOOGLE_CLIENT_ID,
process.env.GOOGLE_CLIENT_SECRET,
process.env.GOOGLE_REDIRECT_URL,
);
const scopes = [
'openid',
'email',
'profile',
'https://www.googleapis.com/auth/userinfo.email',
'https://www.googleapis.com/auth/userinfo.profile',
];
google.options({auth: oauth2Client});
const oauth2 = google.oauth2('v2');
const people = google.people('v1');
router.get('/', (ctx, next) => {
const data = ctx.cookies.get('utokyo.credentials') || '';
const providedSignature = ctx.cookies.get('utokyo.credentials.sig') || '';
const signature = sign(data);
if (signature == providedSignature) {
ctx.body = data;
ctx.type = 'json';
} else {
ctx.body = 'Not signed in';
}
});
router.get('/login', (ctx, next) => {
const url = oauth2Client.generateAuthUrl({
access_type: 'online',
scope: scopes,
});
ctx.redirect(url + '&hd=' + ECCS_HOSTED_DOMAIN);
});
router.get('/auth', async (ctx, next) => {
try {
const code = ctx.query.code;
const {tokens} = await oauth2Client.getToken(code);
oauth2Client.setCredentials(tokens);
const person = (await people.people.get({
resourceName: 'people/me',
personFields: 'emailAddresses',
})).data;
const utokyoIds = [];
for (const obj of person.emailAddresses) {
if ('string' != typeof obj.value) continue;
const matches = obj.value.match(ECCS_ID_PATTERN);
if (matches) {
utokyoIds.push(matches[1]);
}
}
if (utokyoIds.length < 1) {
throw new Error('No UTokyo account ID available for account');
}
const credentials = {
utokyo_id: utokyoIds[0],
email_addresses: person.emailAddresses.map(obj => obj.value).filter(value => 'string' == typeof value),
};
const data = JSON.stringify(credentials);
const signature = sign(data);
ctx.cookies.set('utokyo.credentials', data);
ctx.cookies.set('utokyo.credentials.sig', signature);
ctx.redirect('/');
} catch (e) {
console.error(e);
ctx.body = JSON.stringify({
error: e + '',
});
ctx.type = 'json';
}
});
app
.use(router.routes())
.use(router.allowedMethods());
app.listen(process.env.PORT || 3000);