I've been having this issue for a while now. I'm trying to add a Sign in through Steam button, which upon login, not only retrieves the user's ID, but also validates the signature. Steam uses OpenID 2.0.
I have followed the documentation here. I have followed these steps carefully, spending the better part of my day on trying to figure this out. My code is this:
let s = data['openid.signed'].split(',');
let x = Buffer.from(s.map(x => `${x}:${data['openid.' + x]}`).join('\n') + '\n', 'utf8');
let c = crypto.createHash('sha1').update(x).digest('base64');
console.log(x.toString('utf8')); // This is the key:value string
console.log(c); // This is the final result; the generated signature
Where data is the response given from the OpenID provider.
Logging x (key:value pair string) gives the expected output of:
signed:signed,op_endpoint,claimed_id,identity,return_to,response_nonce,assoc_handle
op_endpoint:https://steamcommunity.com/openid/login
claimed_id:https://steamcommunity.com/openid/id/765611981[1234567]
identity:https://steamcommunity.com/openid/id/765611981[1234567]
return_to:http://127.0.0.1:8000/resolve
response_nonce:2018-12-01T17:53: [some_hash]=
assoc_handle:1234567890
However, my generated hash c does not match the given signature, openid.sig. Note that I use a \n at the end of the above key:value pair string, as that is how I interpreted the documentation.
Note. The reason why I need authentication is that I want to connect the Steam account to an account on my website, and being logged in via Steam gives you full access to your account on my website, meaning that it's of utter importance that a user cannot simply enter another users id and get access to their account (replay attack). Because of this, I need to somehow validate the signature.
I have never worked with OpenID before, so please excuse any foolish mistakes of mine. I highly recommend reading the documentation that is linked above, so that you can verify what I am doing is right.
Kinds regards,
crypto.createHmac('sha1', 'SteamAPIKey32Chars').update(x).digest('base64');but that still does not give the intended hash. – Roseboro