mirror of
https://github.com/0rangebananaspy/authelia.git
synced 2024-09-14 22:47:21 +07:00
771c220d38
* [FEATURE] Support updated haproxy-auth-request This version removes the dependency of lua-socket which seemed to result in many unsupported and broken BSD/Pfsense deployments. * Fix docs indentation * Add haproxy-lua-http to TLS enabled configuration
120 lines
4.0 KiB
Lua
120 lines
4.0 KiB
Lua
-- The MIT License (MIT)
|
|
--
|
|
-- Copyright (c) 2018 Tim Düsterhus
|
|
--
|
|
-- Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
-- of this software and associated documentation files (the "Software"), to deal
|
|
-- in the Software without restriction, including without limitation the rights
|
|
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
-- copies of the Software, and to permit persons to whom the Software is
|
|
-- furnished to do so, subject to the following conditions:
|
|
--
|
|
-- The above copyright notice and this permission notice shall be included in all
|
|
-- copies or substantial portions of the Software.
|
|
--
|
|
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
-- SOFTWARE.
|
|
|
|
local http = require("haproxy-lua-http")
|
|
|
|
function set_var_pre_2_2(txn, var, value)
|
|
return txn:set_var(var, value)
|
|
end
|
|
function set_var_post_2_2(txn, var, value)
|
|
return txn:set_var(var, value, true)
|
|
end
|
|
|
|
set_var = function(txn, var, value)
|
|
local success = pcall(set_var_post_2_2, txn, var, value)
|
|
if success then
|
|
set_var = set_var_post_2_2
|
|
else
|
|
set_var = set_var_pre_2_2
|
|
end
|
|
|
|
return set_var(txn, var, value)
|
|
end
|
|
|
|
function sanitize_header_for_variable(header)
|
|
return header:gsub("[^a-zA-Z0-9]", "_")
|
|
end
|
|
|
|
|
|
core.register_action("auth-request", { "http-req" }, function(txn, be, path)
|
|
set_var(txn, "txn.auth_response_successful", false)
|
|
|
|
-- Check whether the given backend exists.
|
|
if core.backends[be] == nil then
|
|
txn:Alert("Unknown auth-request backend '" .. be .. "'")
|
|
set_var(txn, "txn.auth_response_code", 500)
|
|
return
|
|
end
|
|
|
|
-- Check whether the given backend has servers that
|
|
-- are not `DOWN`.
|
|
local addr = nil
|
|
for name, server in pairs(core.backends[be].servers) do
|
|
local status = server:get_stats()['status']
|
|
if status == "no check" or status:find("UP") == 1 then
|
|
addr = server:get_addr()
|
|
break
|
|
end
|
|
end
|
|
if addr == nil then
|
|
txn:Warning("No servers available for auth-request backend: '" .. be .. "'")
|
|
set_var(txn, "txn.auth_response_code", 500)
|
|
return
|
|
end
|
|
|
|
-- Transform table of request headers from haproxy's to
|
|
-- socket.http's format.
|
|
local headers = {}
|
|
for header, values in pairs(txn.http:req_get_headers()) do
|
|
if header ~= 'content-length' then
|
|
for i, v in pairs(values) do
|
|
if headers[header] == nil then
|
|
headers[header] = v
|
|
else
|
|
headers[header] = headers[header] .. ", " .. v
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Make request to backend.
|
|
local response, err = http.head {
|
|
url = "http://" .. addr .. path,
|
|
headers = headers,
|
|
}
|
|
|
|
-- Check whether we received a valid HTTP response.
|
|
if response == nil then
|
|
txn:Warning("Failure in auth-request backend '" .. be .. "': " .. err)
|
|
set_var(txn, "txn.auth_response_code", 500)
|
|
return
|
|
end
|
|
|
|
set_var(txn, "txn.auth_response_code", response.status_code)
|
|
|
|
for header, value in response:get_headers(true) do
|
|
set_var(txn, "req.auth_response_header." .. sanitize_header_for_variable(header), value)
|
|
end
|
|
|
|
-- 2xx: Allow request.
|
|
if 200 <= response.status_code and response.status_code < 300 then
|
|
set_var(txn, "txn.auth_response_successful", true)
|
|
-- Don't allow other codes.
|
|
-- Codes with Location: Passthrough location at redirect.
|
|
elseif response.status_code == 301 or response.status_code == 302 or response.status_code == 303 or response.status_code == 307 or response.status_code == 308 then
|
|
set_var(txn, "txn.auth_response_location", response:get_header("location", "last"))
|
|
-- 401 / 403: Do nothing, everything else: log.
|
|
elseif response.status_code ~= 401 and response.status_code ~= 403 then
|
|
txn:Warning("Invalid status code in auth-request backend '" .. be .. "': " .. response.status_code)
|
|
end
|
|
end, 2)
|