有没有办法在Node.js中创建SAML断言？

const passport = require('passport');
const SamlStrategy = require('passport-saml').Strategy;

passport.use(new SamlStrategy(
  {
    entryPoint: 'https://idp.example.com/saml2/idp/SSOService.php',
    issuer: 'https://your-app.example.com',
    callbackUrl: 'https://your-app.example.com/saml/callback',
    cert: '-----BEGIN CERTIFICATE-----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\n1Q1Z6z5n1ZaK8+TQ==\n-----END CERTIFICATE-----'
  },
  function(profile, done) {
    // 处理身份验证成功后的逻辑
    // profile参数包含从SAML断言中提取的用户信息
    return done(null, profile);
  }
));

app.get('/saml/login', passport.authenticate('saml'));
app.post('/saml/callback', passport.authenticate('saml', { failureRedirect: '/login' }), function(req, res) {
  // 身份验证成功后的逻辑
  res.redirect('/');
});