author | Matthew Wild <mwild1@gmail.com> |
Mon, 12 Feb 2024 16:31:25 +0000 | |
changeset 5842 | 1ae8f7b3787a |
parent 3119 | d2bf9c8be3a3 |
permissions | -rw-r--r-- |
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local host = module.host; |
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local log = module._log; |
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local new_sasl = require "util.sasl".new; |
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local base64 = require "util.encodings".base64.encode; |
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local provider = {}; |
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local oauth_client_id = module:get_option_string("oauth_client_id", ""); |
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local oauth_client_secret = module:get_option_string("oauth_client_secret", ""); |
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local oauth_url = module:get_option_string("oauth_url", ""); |
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if oauth_client_id == "" then error("oauth_client_id required") end |
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if oauth_client_secret == "" then error("oauth_client_secret required") end |
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if oauth_url == "" then error("oauth_url required") end |
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-- globals required by socket.http |
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if rawget(_G, "PROXY") == nil then |
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rawset(_G, "PROXY", false) |
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end |
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if rawget(_G, "base_parsed") == nil then |
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rawset(_G, "base_parsed", false) |
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end |
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local function interp(s, tab) |
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-- String interpolation, so that we can make the oauth_url configurable |
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-- e.g. oauth_url = "https://api.github.com/applications/{{oauth_client_id}}/tokens/{{password}}"; |
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-- |
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-- See: http://lua-users.org/wiki/StringInterpolation |
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return (s:gsub('(%b{})', function(w) return tab[w:sub(3, -3)] or w end)) |
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end |
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function provider.test_password(username, password, realm) |
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log("debug", "Testing signed OAuth2 for user %s at realm %s", username, realm); |
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local https = require "ssl.https"; |
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local url = interp(oauth_url, {oauth_client_id = oauth_client_id, password = password}); |
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module:log("debug", "The URL is: "..url); |
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local _, code, headers, status = https.request{ |
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url = url, |
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headers = { |
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Authorization = "Basic "..base64(oauth_client_id..":"..oauth_client_secret); |
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} |
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}; |
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if type(code) == "number" and code >= 200 and code <= 299 then |
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module:log("debug", "OAuth provider confirmed valid password"); |
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return true; |
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else |
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module:log("debug", "OAuth provider returned status code: "..code); |
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end |
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module:log("warn", "Auth failed. Invalid username/password or misconfiguration."); |
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return nil; |
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end |
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function provider.users() |
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return function() |
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return nil; |
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end |
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end |
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function provider.set_password(username, password) |
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return nil, "Changing passwords not supported"; |
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end |
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function provider.user_exists(username) |
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return true; |
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end |
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function provider.create_user(username, password) |
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return nil, "User creation not supported"; |
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end |
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function provider.delete_user(username) |
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return nil , "User deletion not supported"; |
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end |
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function provider.get_sasl_handler() |
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local supported_mechanisms = {}; |
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supported_mechanisms["OAUTHBEARER"] = true; |
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return new_sasl(host, { |
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oauthbearer = function(sasl, username, password, realm) |
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return provider.test_password(username, password, realm), true; |
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end, |
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mechanisms = supported_mechanisms |
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}); |
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end |
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module:provides("auth", provider); |