httpserver-basicauth.lua

-- httpserver-basicauth.lua
-- Part of nodemcu-httpserver, authenticates a user using http basic auth.
-- Author: Sam Dieck

basicAuth = {}

function basicAuth.authenticate(header)
 conf = dofile("httpserver-conf.lc")
 -- Parse basic auth http header.
 -- Returns the username if header contains valid credentials,
 -- nil otherwise.
 local credentials_enc = header:match("Authorization: Basic ([A-Za-z0-9+/=]+)")
 if not credentials_enc then
 return nil
 end
 local credentials = dofile("httpserver-b64decode.lc")(credentials_enc)
 local user, pwd = credentials:match("^(.*):(.*)$")
 if user ~= conf.auth.user or pwd ~= conf.auth.password then
 return nil
 end
 print("httpserver-basicauth: User \"" .. user .. "\" authenticated.")
 return user
end

function basicAuth.authErrorHeader()
 return "WWW-Authenticate: Basic realm=\"" .. conf.auth.realm .. "\""
end

return basicAuth