Non-time-constant String Comparison

Non-time-constant String Comparison

Maybe someone can point me in the right direction. I'm aiming to make a
non-time-constant string comparison script that does the following:
Connects to a server with telnet (e.g. telnet 192.168.56.101 80)
Sends a base64 encoded get request with a username and password e.g.
GET /authentication/example2/ HTTP/1.1 Host: 192.168.56.101 Authorization:
Basic dXNlcm5hbWU6cGFzc3dvcmQK
Receives the response, logs the time in milliseconds it took to receive
the response and continue to base64 encode and send the GET request above
to brute force the password.
Can this be done in bash?