Websocket handshake Sec-WebSocket-Accept header value is incorrect

Question

I\'m writing a c++ websocket server, dev tools on chrome says sec-websocket-accept header value is incorrect. I\'ve tested for days and it all seems fine. The client closes

Answer 1

Chrome says that 'Sec-WebSocket-Accept' is incorrect. Trying to compute it manually, I have to agree with Chrome.

My test:

1. concat "LKF8lHGznbKGIgO1UzAOhg==" and "258EAFA5-E914-47DA-95CA-C5AB0DC85B11" => "LKF8lHGznbKGIgO1UzAOhg==258EAFA5-E914-47DA-95CA-C5AB0DC85B11", that's key.
2. compute SHA1 160 bits hex: bf15 14e3 7108 0ee4 7782 c709 a767 cc72 423d e5c4
3. From your log, your encoding to base64 is: 5T5MvxP1iz40vLpi3kQs/ifDaCo=
4. Decoding it to hex: e53e 4cbf 13f5 8b3e 34bc ba62 de44 2cfe 27c3 682a

The bold values should be equal. Feel free to correct me if I'm wrong somewhere.

Possible problems:

• Is sha_str null-terminated ? i.e. strlen((char*)sha_str) == 20 ?

• signed/unsigned char mixup ?