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Using the Google Sign-In bearer token on vanilla javascript web app hosted with firebase functions

It seems there are many issues surrounding this with very few results e.g. here with no definitive answer.
Using the javascript Google Sign-in method, which returns the OAuth credential which includes accessToken, User, etc - the token which should be present in all authenticated requests to the hosted app (where security is crucial).
Is the following a good solution for vanilla Javascript web apps client-side (in one of the .js files) and what issues may arise from it?
// 1. Sign-in
firebase.auth()
.signInWithPopup(provider)
.then((result) => {
// 2. upon successful sign-in
Axios({
url: "/user/register-token",
method: "POST",
headers: {authorization: `Bearer ${idToken}`},
data: { //empty }
}).then((result) => {
// 3. successfully registered & authenticated, proceed to authenticated dashboard route
window.location.assign('/user/dashboard');
}).catch((error) => { // handle error});
}).catch((error) => {
// 4. Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
console.log(error);
});
Steps:
Sign-in with Google signin (using popup)
On successful popup signin, send token to GET /user/register-token which takes the token, verifies it (with some additional email domain checks) and saves it to the session cookie
Upon successful token registered, go to authenticated page
Handle error
My logic:
Since the session is stored server side, but there are session Id's attached to the current browsing session, I can thus use this as a "password of sorts" to verify the firebase session.
Concerns:
The only concern is using any verified firebase token and registering it. This however is address (where I check the associated email and confirm it is part of a firebase user collection & it has a recognized and accepted domain). Thus, they are not confirmed and sent back to the login page with a HTTP/403.
Is my logic sound, are there any potential issues?

My solution was on the right track, and matched up quite well with Firebase's cookie session.
For the record, I had alot of trouble storing the bearer token in my express session, thus searched for other solutions.
According to my steps, the solutions follows the same footprint, but with a slightly different implementation:
client-side changes
The ID Token (bane of my existence for atleast 24 hours) can be retrieved using this solution.
TL;DR (client side)
firebase.auth()
.signInWithPopup(provider)
.then((result) => {
firebase.auth().currentUser
.getIdToken()
.then((idToken) => // use this idToken, NOT result.credential.idToken
//...
Finally, send that to your server to create a session, endpoint is of your choosing e.g. POST: /user/createSession
Server-side changes
You need an endpoint (mine is /user/sessionLogin - part of userRouter - see more more info). Using the code below, you can also include CSRF (I couldn't get mind to work on the client side...), createSessionCookie using the idToken above - this works perfectly w/o any issues.
router.post('/sessionLogin', (req, res) => {
// Get the ID token passed and the CSRF token.
const idToken = req.body.idToken.toString();
// const csrfToken = req.body.csrfToken.toString();
// // Guard against CSRF attacks.
// if (csrfToken !== req.cookies.csrfToken) {
// res.status(401).send('UNAUTHORIZED REQUEST!');
// return;
// }
// Set session expiration to 5 days.
const expiresIn = 60 * 60 * 24 * 5 * 1000;
// Create the session cookie. This will also verify the ID token in the process.
// The session cookie will have the same claims as the ID token.
// To only allow session cookie setting on recent sign-in, auth_time in ID token
// can be checked to ensure user was recently signed in before creating a session cookie.
const auth = admin.auth();
auth.verifyIdToken(idToken).then(value => {
console.log("Token verified")
return auth.createSessionCookie(idToken, {expiresIn})
.then((sessionCookie) => {
// Set cookie policy for session cookie.
const options = {maxAge: expiresIn, httpOnly: true, secure: true};
res.cookie('session', sessionCookie, options);
res.end(JSON.stringify({status: 'success'}));
}).catch((error) => {
console.error(error);
res.status(401).send('UNAUTHORIZED REQUEST!');
});
}).catch(reason => {
console.error("Unable to verify token");
console.error(reason);
res.status(401).send('INVALID TOKEN!');
});
});
Finally, to validate your requests and check cookie status, you need to verify your requests to the server using (or request a new login session by redirecting to /user/login):
exports.authenticate = (req, res, next) => {
const sessionCookie = req.cookies.session || '';
// Verify the session cookie. In this case an additional check is added to detect
// if the user's Firebase session was revoked, user deleted/disabled, etc.
return admin
.auth()
.verifySessionCookie(sessionCookie, true /** checkRevoked */)
.then((decodedClaims) => {
req.user = decodedClaims;
next();
})
.catch((error) => {
console.error(error);
// Session cookie is unavailable or invalid. Force user to login.
req.flash("message", [{
status: false,
message: "Invalid session, please login again!"
}])
res.redirect('/user/login');
});
};
see this for more information.

AWS Cognito login with Facebook

I have an Angular 10 site. I have an AWS Lambda (ASP.NET Core 3.1) that does authentication with AWS Cognito for users with email/password. But I want to allow users to also use Facebook (and eventually Google) to log in as well. In the Facebook/Google scenario my thought is not to allow access to AWS services directly for now (like S3, etc) but to interact with with my other lambda via a bearer token. I have a Cognito User Pool for which I created a Facebook identity provider and mappings. I read somewhere that I'd need an Identity Pool. So I created that and put in my Cognito user pool as a provider as well as Facebook.
Using the JavaScript code:
loginWithFacebook = () => {
const login$ = from(this.facebookService.login());
login$.subscribe(
(response: LoginResponse) => {
console.log(response);
this.facebookLoginToAWS(response);
},
error => {
console.error(error);
}
);
};
I can get a Facebook auth response no problem. Then using this code that you see on every blog, Stack Overflow post, and even in AWS's documentation (of course, substituting my own IdenityPoolId):
private facebookLoginToAWS = (facebookResponse: LoginResponse) => {
console.log('facebookLoginToAWS', facebookResponse);
if (facebookResponse.status === 'connected' && facebookResponse.authResponse) {
AWS.config.credentials = new AWS.CognitoIdentityCredentials({
IdentityPoolId: 'us-east-1:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx',
Logins: { 'graph.facebook.com': facebookResponse.authResponse.accessToken }
}, {
region: 'eu-west-1'
});
AWS.config.credentials.get((err) => {
if (err) {
return console.log("Error", err);
}
console.log("Cognito credentials", AWS.config.credentials);
console.log("Cognito Identity Id", AWS.config.credentials.identityId);
});
} else if (facebookResponse.status === 'not_authorized') {
document.getElementById('facebookStatus').innerHTML = 'Please log into this app.';
} else {
document.getElementById('facebookStatus').innerHTML = 'Please log into Facebook.';
}
};
I can get back a session token (in addition to a ton of other stuff like accesKeyId, identityId, and secretAccessKey).
But what do I do with that session token? Perhaps I'm confused, but I would think because there is a mapping between Facebook fields and Cognito fields, that somehow that Facebook user would be migrated into the Cognito user pool and I could get a JWT token for that user for my other lambdas. But after checking the AWS dashboard, I can see a log in (I think) in the Identity Pool but there is no corresponding User Pool entry.
Do I somehow have to manually migrate it over (using the AWS JavaScript SDK)? I don't want to use the Amplify library. Am I thinking about it wrong? Do I somehow use the session token as a bearer token with my other lambdas? Do I need to add that person as a user pool user somehow?

How to persist Cognito User Session

I am using javascript sdk for AWS cognito and able to login with aws cognito and receiving tokens in response.
I can see that the user session is valid until I refresh the page. Please suggest how the user session can persist after refreshing the page.
Below is my code.
function getSession() {
let poolData = {
UserPoolId: _config.cognito.userPoolId, // Your user pool id here
ClientId: _config.cognito.clientId, // Your client id here
};
//alert(sessionStorage.getItem("SessionName"));
let userPool = new AmazonCognitoIdentity.CognitoUserPool(poolData);
cognitoUser = userPool.getCurrentUser();
cognitoUser.getSession(function (err, session) {
if (err) {
alert(err);
return;
}
console.log('session validity: ' + session.isValid());
//Set the profile info
cognitoUser.getUserAttributes(function (err, result) {
if (err) {
console.log(err);
return;
}
console.log("------>>" + result);
//document.getElementById("email_value").innerHTML = result[2].getValue();
});
});
}

good news - the SDK does this for you. Check out their code for the getsession method
You can see they store the tokens to local storage for you.
To view the tokens from Google Chrome, go to developer tools -> Application. You should see a 'Storage' section on the left hand side. Open Local Storage, the tokens are saved under the URL of the application.
You should not need to access these token directly, the SDK will fetch and save the tokens as required when you call different methods.

How can I get AWS credentials using a SAML token?

What I am trying to do: Authenticate my users using ADFS, pass the SAML response token to AWS and get back credentials which I can then use to access AWS resources.
What I am able to do now: Sign in successfully through ADFS and get the SAML token back which confirms the successfully sign in.
What is not working: Calling the AWS.STS.assumeRoleWithSaml functions gets a 403 Access Denied error
How it works thus far:
Users click a button on my application, which calls the following:
var RPID = encodeURIComponent('urn:amazon:webservices');
var result = 'https://virtualMachine.eastus.cloudapp.azure.com/adfs/ls/IdpInitiatedSignOn.aspx?loginToRp=' + RPID;
window.location.href = result;
A successful sign in here returns back to the application a SAML response token
var saml = new URL(window.location.href);
var token = saml.searchParams.get('SAMLResponse');
The application then calls assumeRoleWithSAML to get back credentials. The Principal ARN refers to the identity provider I am trying to access and the RoleARN refers to a role which has full access to everything:
authenticateSAMLwithCognito(token) {
//define our security token service object
var sts = new AWS.STS();
//build our parameter object
var params = {
//cognito identity provider
PrincipalArn: 'arn:aws:iam::accountid:saml-provider/wmpo-adfs',
//role assuming
RoleArn: 'arn:aws:iam::accountid:role/ADFS-Dev',
//authorization
SAMLAssertion: token
}
console.log("Parameters sent", params);
sts.assumeRoleWithSAML(params, (err, data) => {
if(err) console.log(err);
else console.log("Success!", data);
})
}
However the response from this exchange is:
I am really unsure why this is, but if anyone has some helpful pushes that would be great! Thanks and happy new year

Wow that only took days, but though I was constantly stumbling, I finally made it to the point I was trying to get.
The answer was in the same credentials get function that I used when I authenticated users through a username password combo by way of a Cognito User Pool.
authenticateThroughCognito(token) {
AWS.config.credentials = new AWS.CognitoIdentityCredentials({
IdentityPoolId: 'us-west-2:IdentityPoolId',
Logins: {
'arn:aws:iam::accountId:saml-provider/wmpo-adfs' : token
}
});
(AWS.config.credentials as AWS.Credentials).get((err) => {
if(err) console.log(err);
else {
console.log("Success");
console.log(AWS.config.credentials);
}
})
}

Firebase admin sdk: idToken OR custom token verification for authorization

I'm creating a custom token on backend server while login and below is the code:
UserSchema.methods.generateAuthToken = function() {
var user = this;
var access = "auth";
return firebaseAdmin.default
.auth()
.createCustomToken(user._id.toHexString())
.then(function(token) {
user.tokens = user.tokens.concat([{ access, token }]);
return user.save().then(() => {
return token;
});
});
};
and storing this token inside mongodb and sending it back to client via header named "x-auth" and then stored it inside cookies.
On client side, using this token to signin like below:
axios({
url: "/api/users/login",
method: "POST",
data: {
email: data.email,
password: data.password
}
}).then(res => {
Cookies.set("x-auth", res.headers["x-auth"], { expires: 7 });
return firebase
.auth()
.signInWithCustomToken(res.headers["x-auth"])
.then(response => {
console.log("CA", response);
response
.getIdToken()
.then(idToken => {
Cookies.set("idToken", idToken, { expires: 7 });
})
.catch(e => {});
dispatch(
login({
token: Cookies.get("x-auth")
})
);
});
});
Now in order to call an api to fetch all users, I'm sending these tokens, custom token and idToken back to server:
const authenticate = (req, res, next) => {
const token = req.header("x-auth");
const idToken = req.header("idToken");
User.findByToken(token, idToken)
.then(user => {
if (!user) {
return Promise.reject({
message: "no user found with the associated token!"
});
}
req.user = user;
req.token = token;
next();
})
.catch(e => {
res.status(401).send(setErrorMessage(e.message));
});
};
And findByToken is as below:
UserSchema.statics.findByToken = function(token, idToken) {
var User = this;
return firebaseAdmin.default
.auth()
.verifyIdToken(idToken)
.then(function(decodedToken) {
var uid = decodedToken.uid;
return User.findOne({
_id: uid,
"tokens.access": "auth",
"tokens.token": token
});
})
.catch(function(e) {
return Promise.reject(e);
});
};
Why do I have to send both these tokens for authorization, is there anything wrong with the concept here.
https://firebase.google.com/docs/auth/admin/verify-id-tokens
Warning: The ID token verification methods included in the Firebase Admin SDKs are meant to verify ID tokens that come from the client SDKs, not the custom tokens that you create with the Admin SDKs. See Auth tokens for more information.
Please clarify if I can verify the custom token instead of idToken to retrieve userId and match it up with DB, instead of using different tokens for one purpose or I'm doing something wrong here and custom token should not be stored inside DB, and there is some other approach to it.
And now after sometime when I try to fetch all users, it says:
Firebase ID token has expired. Get a fresh token from your client app and try again (auth/id-token-expired). See https://firebase.google.com/docs/auth/admin/verify-id-tokens for details on how to retrieve an ID token.

When working with tokens, you need to differentiate each token and what it is used for, also each token has related properties.
Custom Tokens: These tokens will be generated in the server (as you are doing) and are used in the client side to authenticate the client. These tokens expire after one hour.
Session ID Token: (I'm calling it "Session ID Token" just to differentiate it) When the client autheticates with any of the authentication providers, the SDK will exchange the information for an ID token used for the session. The same applies for custom tokens, where the SDK exchanges the custom token for an ID Token. ID Tokens are also short live and will expire after one hour. When getting the ID Token, the SDK also receives a refresh Token which is used for refreshing the session ID Token. The ID token is used when doing authenticated requests to Firebase.
ID Token for verification: To get this token, you will need to call the function "getIDToken" (for Web). This function will return an ID Token that can be used only to verify requests coming from the client to your server. Similar to the other tokens, this one expires after one hour. When calling the getIDToken, the function will request a new one if the current is expired.
To verify the ID Token, you must use the mentioned token. If you try to use the session ID Token or the Custom token, you will get errors. The same applies if you try to use an expired ID Token.
All the calls and tasks to refresh the ID Tokens are handled by the SDKs behind the scenes.
It is not a good practice to store these tokens as they will expire after one hour, is better if you call the appropriate functions to get the latets tokens and pass the correct ID Token to be verified.
Lastly, you can find in these links the properties used for generating the custom token and the ID Token for verification.