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Eynix 2018-06-07 11:56:44 +02:00
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helpers.lua.bak
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--
-- helpers.lua
--
-- This is a file called at every request by the `access.lua` file. It contains
-- a set of useful functions related to HTTP and LDAP.
--
module('helpers', package.seeall)
local cache = ngx.shared.cache
local conf = config.get_config()
-- Read a FS stored file
function read_file(file)
local f = io.open(file, "rb")
if not f then return false end
local content = f:read("*all")
f:close()
return content
end
-- Lua has no sugar :D
function is_in_table(t, v)
for key, value in ipairs(t) do
if value == v then return key end
end
end
-- Get the index of a value in a table
function index_of(t,val)
for k,v in ipairs(t) do
if v == val then return k end
end
end
-- Test whether a string starts with another
function string.starts(String, Start)
return string.sub(String, 1, string.len(Start)) == Start
end
-- Test whether a string ends with another
function string.ends(String, End)
return End=='' or string.sub(String, -string.len(End)) == End
end
-- Find a string by its translate key in the right language
function t(key)
if conf.lang and i18n[conf.lang] and i18n[conf.lang][key] then
return i18n[conf.lang][key]
else
return i18n[conf["default_language"]][key] or ""
end
end
-- Store a message in the flash shared table in order to display it at the
-- next response
function flash(wat, message)
if wat == "fail"
or wat == "win"
or wat == "info"
then
flashs[wat] = message
end
end
-- Hash a string using hmac_sha512, return a hexa string
function hmac_sha512(key, message)
local cache_key = key..":"..message
if not cache:get(cache_key) then
-- lua ecosystem is a disaster and it was not possible to find a good
-- easily multiplatform integrable code for this
--
-- this is really dirty and probably leak the key and the message in the process list
-- but if someone got there I guess we really have other problems so this is acceptable
-- and also this is way better than the previous situation
local pipe = io.popen("echo -n '" ..message:gsub("'", "'\\''").. "' | openssl sha512 -hmac '" ..key:gsub("'", "'\\''").. "'")
-- openssl returns something like this:
-- root@yunohost:~# echo -n "qsd" | openssl sha512 -hmac "key"
-- (stdin)= f1c2b1658fe64c5a3d16459f2f4eea213e4181905c190235b060ab2a4e7d6a41c15ea2c246828537a1e32ae524b7a7ed309e6d296089194c3e3e3efb98c1fbe3
--
-- so we need to remove the "(stdin)= " at the beginning
local hash = pipe:read():sub(string.len("(stdin)= ") + 1)
pipe:close()
cache:set(cache_key, hash, conf["session_timeout"])
return hash
else
return cache:get(cache_key)
end
end
-- Convert a table of arguments to an URI string
function uri_args_string(args)
if not args then
args = ngx.req.get_uri_args()
end
String = "?"
for k,v in pairs(args) do
String = String..tostring(k).."="..tostring(v).."&"
end
return string.sub(String, 1, string.len(String) - 1)
end
-- Set the Cross-Domain-Authentication key for a specific user
function set_cda_key()
local cda_key = random_string()
cache:set("CDA|"..cda_key, authUser, 10)
return cda_key
end
-- Compute and set the authentication cookie
--
-- Sets 3 cookies containing:
-- * The username
-- * The expiration time
-- * A hash of those information along with the client IP address and a unique
-- session key
--
-- It enables the SSO to quickly retrieve the username and the session
-- expiration time, and to prove their authenticity to avoid session hijacking.
--
function set_auth_cookie(user, domain)
local maxAge = conf["session_max_timeout"]
local expire = ngx.req.start_time() + maxAge
local session_key = cache:get("session_"..user)
if not session_key then
session_key = random_string()
cache:add("session_"..user, session_key, conf["session_max_timeout"])
end
local hash = hmac_sha512(srvkey,
user..
"|"..expire..
"|"..session_key)
local cookie_str = "; Domain=."..domain..
"; Path=/"..
"; Expires="..os.date("%a, %d %b %Y %X UTC;", expire)..
"; Secure"
ngx.header["Set-Cookie"] = {
"SSOwAuthUser="..user..cookie_str,
"SSOwAuthHash="..hash..cookie_str,
"SSOwAuthExpire="..expire..cookie_str
}
end
-- Expires the 3 session cookies
function delete_cookie()
conf = config.get_config()
local expired_time = "Thu, 01 Jan 1970 00:00:00 UTC;"
for _, domain in ipairs(conf["domains"]) do
local cookie_str = "; Domain=."..domain..
"; Path=/"..
"; Expires="..expired_time..
"; Secure"
ngx.header["Set-Cookie"] = {
"SSOwAuthUser="..cookie_str,
"SSOwAuthHash="..cookie_str,
"SSOwAuthExpire="..cookie_str
}
end
end
-- Expires the redirection cookie
function delete_redirect_cookie()
local expired_time = "Thu, 01 Jan 1970 00:00:00 UTC;"
local cookie_str = "; Path="..conf["portal_path"]..
"; Expires="..expired_time..
"; Secure"
ngx.header["Set-Cookie"] = "SSOwAuthRedirect=;" ..cookie_str
end
-- Validate authentification
--
-- Check if the session cookies are set, and rehash server + client information
-- to match the session hash.
--
function is_logged_in()
local expireTime = ngx.var.cookie_SSOwAuthExpire
local user = ngx.var.cookie_SSOwAuthUser
local authHash = ngx.var.cookie_SSOwAuthHash
if expireTime and expireTime ~= ""
and authHash and authHash ~= ""
and user and user ~= ""
then
-- Check expire time
if (ngx.req.start_time() <= tonumber(expireTime)) then
-- Check hash
local session_key = cache:get("session_"..user)
if session_key and session_key ~= "" then
-- Check cache
if cache:get(user.."-password") then
authUser = user
local hash = hmac_sha512(srvkey,
authUser..
"|"..expireTime..
"|"..session_key)
return hash == authHash
end
end
end
end
return false
end
-- Check whether a user is allowed to access a URL using the `users` directive
-- of the configuration file
function has_access(user, url)
user = user or authUser
url = url or ngx.var.host..ngx.var.uri
if not conf["users"][user] then
conf = config.get_config()
end
-- If there are no `users` directive, or if the user has no ACL set, he can
-- access the URL by default
if not conf["users"] or not conf["users"][user] then
return true
end
-- Loop through user's ACLs and return if the URL is authorized.
for u, _ in pairs(conf["users"][user]) do
-- Replace the original domain by a local one if you are connected from
-- a non-global domain name.
if ngx.var.host == conf["local_portal_domain"] then
u = string.gsub(u, conf["original_portal_domain"], conf["local_portal_domain"])
end
if string.starts(url, string.sub(u, 1, -2)) then return true end
end
return false
end
-- Authenticate a user against the LDAP database using a username or an email
-- address.
-- Reminder: conf["ldap_identifier"] is "uid" by default
function authenticate(user, password)
conf = config.get_config()
-- Try to find the username from an email address by openning an anonymous
-- LDAP connection and check if the email address exists
if conf["allow_mail_authentication"] and string.find(user, "@") then
ldap = lualdap.open_simple(conf["ldap_host"])
for dn, attribs in ldap:search {
base = conf["ldap_group"],
scope = "onelevel",
sizelimit = 1,
filter = "(mail="..user..")",
attrs = {conf["ldap_identifier"]}
} do
if attribs[conf["ldap_identifier"]] then
ngx.log(ngx.NOTICE, "Use email: "..user)
user = attribs[conf["ldap_identifier"]]
else
ngx.log(ngx.ERR, "Unknown email: "..user)
return false
end
end
ldap:close()
end
-- Now that we have a username, we can try connecting to the LDAP base.
connected = lualdap.open_simple (
conf["ldap_host"],
conf["ldap_identifier"].."=".. user ..","..conf["ldap_group"],
password
)
cache:flush_expired()
-- If we are connected, we can retrieve the password and put it in the
-- cache shared table in order to eventually reuse it later when updating
-- profile information or just passing credentials to an application.
if connected then
ensure_user_password_uses_strong_hash(connected, user, password)
cache:add(user.."-password", password, conf["session_timeout"])
ngx.log(ngx.NOTICE, "Connected as: "..user)
return user
-- Else, the username/email or the password is wrong
else
ngx.log(ngx.ERR, "Connection failed for: "..user)
return false
end
end
function delete_user_info_cache(user)
cache:delete(user.."-"..conf["ldap_identifier"])
local i = 2
while cache:get(user.."-mail|"..i) do
cache:delete(user.."-mail|"..i)
i = i + 1
end
local i = 2
while cache:get(user.."-maildrop|"..i) do
cache:delete(user.."-maildrop|"..i)
i = i + 1
end
end
-- Set the authentication headers in order to pass credentials to the
-- application underneath.
function set_headers(user)
-- We definitely don't want to pass credentials on a non-encrypted
-- connection.
if ngx.var.scheme ~= "https" then
return redirect("https://"..ngx.var.host..ngx.var.uri..uri_args_string())
end
local user = user or authUser
-- If the password is not in cache or if the cache has expired, ask for
-- logging.
if not cache:get(user.."-password") then
flash("info", t("please_login"))
local back_url = ngx.var.scheme .. "://" .. ngx.var.host .. ngx.var.uri .. uri_args_string()
return redirect(conf.portal_url.."?r="..ngx.encode_base64(back_url))
end
-- If the user information is not in cache, open an LDAP connection and
-- fetch it.
if not cache:get(user.."-"..conf["ldap_identifier"]) then
ldap = lualdap.open_simple(
conf["ldap_host"],
conf["ldap_identifier"].."=".. user ..","..conf["ldap_group"],
cache:get(user.."-password")
)
ngx.log(ngx.NOTICE, "Reloading LDAP values for: "..user)
for dn, attribs in ldap:search {
base = conf["ldap_identifier"].."=".. user ..","..conf["ldap_group"],
scope = "base",
sizelimit = 1,
attrs = conf["ldap_attributes"]
} do
for k,v in pairs(attribs) do
if type(v) == "table" then
for k2,v2 in ipairs(v) do
if k2 == 1 then cache:set(user.."-"..k, v2, conf["session_timeout"]) end
cache:set(user.."-"..k.."|"..k2, v2, conf["session_max_timeout"])
end
else
cache:set(user.."-"..k, v, conf["session_timeout"])
end
end
end
else
-- Else, just revalidate session for another day by default
password = cache:get(user.."-password")
cache:set(user.."-password", password, conf["session_timeout"])
end
-- Set `authorization` header to enable HTTP authentification
ngx.req.set_header("Authorization", "Basic "..ngx.encode_base64(
user..":"..cache:get(user.."-password")
))
-- Set optionnal additional headers (typically to pass email address)
for k, v in pairs(conf["additional_headers"]) do
ngx.req.set_header(k, cache:get(user.."-"..v))
end
end
-- Summarize email, aliases and forwards in a table for a specific user
function get_mails(user)
local mails = { mail = "", mailalias = {}, maildrop = {} }
-- default mail
mails["mail"] = cache:get(user.."-mail")
-- mail aliases
if cache:get(user.."-mail|2") then
local i = 2
while cache:get(user.."-mail|"..i) do
table.insert(mails["mailalias"], cache:get(user.."-mail|"..i))
i = i + 1
end
end
-- mail forward
if cache:get(user.."-maildrop|2") then
local i = 2
while cache:get(user.."-maildrop|"..i) do
table.insert(mails["maildrop"], cache:get(user.."-maildrop|"..i))
i = i + 1
end
end
return mails
end
-- Yo dawg, this enables SSOwat to serve files in HTTP in an HTTP server
-- Much reliable, very solid.
--
-- Takes an URI, and returns file content with the proper HTTP headers.
-- It is used to render the SSOwat portal *only*.
function serve(uri)
rel_path = string.gsub(uri, conf["portal_path"], "/")
-- Load login.html as index
if rel_path == "/" then
if is_logged_in() then
rel_path = "/info.html"
else
rel_path = "/login.html"
end
end
-- Access to directory root: forbidden
if string.ends(rel_path, "/") then
return ngx.exit(ngx.HTTP_FORBIDDEN)
end
-- Try to get file content
local content = read_file(script_path.."portal"..rel_path)
if not content then
return ngx.exit(ngx.HTTP_NOT_FOUND)
end
-- Extract file extension
_, file, ext = string.match(rel_path, "(.-)([^\\/]-%.?([^%.\\/]*))$")
-- Associate to MIME type
mime_types = {
html = "text/html",
ms = "text/html",
js = "text/javascript",
map = "text/javascript",
css = "text/css",
gif = "image/gif",
jpg = "image/jpeg",
png = "image/png",
svg = "image/svg+xml",
ico = "image/vnd.microsoft.icon",
woff = "application/x-font-woff",
json = "application/json"
}
-- Set Content-Type
if mime_types[ext] then
ngx.header["Content-Type"] = mime_types[ext]
else
ngx.header["Content-Type"] = "text/plain"
end
-- Render as mustache
if ext == "html" then
local data = get_data_for(file)
local rendered = hige.render(read_file(script_path.."portal/header.ms"), data)
rendered = rendered..hige.render(content, data)
content = rendered..hige.render(read_file(script_path.."portal/footer.ms"), data)
elseif ext == "ms" then
local data = get_data_for(file)
content = hige.render(content, data)
elseif ext == "json" then
local data = get_data_for(file)
content = json.encode(data)
end
-- Reset flash messages
flashs["fail"] = nil
flashs["win"] = nil
flashs["info"] = nil
-- Ain't nobody got time for cache
ngx.header["Cache-Control"] = "no-cache"
-- Print file content
ngx.say(content)
-- Return 200 :-)
return ngx.exit(ngx.HTTP_OK)
end
-- Simple controller that computes a data table to populate a specific view.
-- The resulting data table typically contains the user information, the page
-- title, the flash notifications' content and the translated strings.
function get_data_for(view)
local user = authUser
conf = config.get_config()
-- For the login page we only need the page title
if view == "login.html" then
data = {
title = t("login"),
connected = false
}
-- For those views, we may need user information
elseif view == "info.html"
or view == "edit.html"
or view == "password.html"
or view == "ynhpanel.json" then
-- Invalidate cache before loading these views.
-- Needed if the LDAP db is changed outside ssowat (from the cli for example).
-- Not doing it for ynhpanel.json only for performance reasons,
-- so the panel could show wrong first name, last name or main email address
if view ~= "ynhpanel.json" then
delete_user_info_cache(user)
end
-- Be sure cache is loaded
set_headers(user)
local mails = get_mails(user)
data = {
connected = true,
portal_url = conf.portal_url,
uid = user,
cn = cache:get(user.."-cn"),
sn = cache:get(user.."-sn"),
givenName = cache:get(user.."-givenName"),
mail = mails["mail"],
mailalias = mails["mailalias"],
maildrop = mails["maildrop"],
app = {}
}
local sorted_apps = {}
-- Add user's accessible URLs using the ACLs.
-- It is typically used to build the app list.
for url, name in pairs(conf["users"][user]) do
if ngx.var.host == conf["local_portal_domain"] then
url = string.gsub(url, conf["original_portal_domain"], conf["local_portal_domain"])
end
table.insert(sorted_apps, name)
table.sort(sorted_apps)
table.insert(data["app"], index_of(sorted_apps, name), { url = url, name = name })
end
end
-- Pass all the translated strings to the view (to use with t_<key>)
for k, v in pairs(i18n[conf["default_language"]]) do
data["t_"..k] = (i18n[conf.lang] and i18n[conf.lang][k]) or v
end
-- Pass flash notification content
data['flash_fail'] = {flashs["fail"]}
data['flash_win'] = {flashs["win"] }
data['flash_info'] = {flashs["info"]}
return data
end
-- this function is launched after a successful login
-- it checked if the user password is stored using the most secure hashing
-- algorithm available
-- if it's not the case, it migrates the password to this new hash algorithm
function ensure_user_password_uses_strong_hash(ldap, user, password)
local current_hashed_password = nil
for dn, attrs in ldap:search {
base = "ou=users,dc=yunohost,dc=org",
scope = "onelevel",
sizelimit = 1,
filter = "(uid="..user..")",
attrs = {"userPassword"}
} do
current_hashed_password = attrs["userPassword"]:sub(0, 10)
end
-- if the password is not hashed using sha-512, which is the strongest
-- available hash rehash it using that
-- Here "{CRYPT}" means "uses linux auth system"
-- "6" means "uses sha-512", any lower number mean a less strong algo (1 == md5)
if current_hashed_password:sub(0, 10) ~= "{CRYPT}$6$" then
local dn = conf["ldap_identifier"].."="..user..","..conf["ldap_group"]
local hashed_password = hash_password(password)
ldap:modify(dn, {'=', userPassword = hashed_password })
end
end
-- Compute the user modification POST request
-- It has to update cached information and edit the LDAP user entry
-- according to the changes detected.
function edit_user()
conf = config.get_config()
-- We need these calls since we are in a POST request
ngx.req.read_body()
local args = ngx.req.get_post_args()
-- Ensure that user is logged in and has passed information
-- before continuing.
if is_logged_in() and args
then
-- Set HTTP status to 201
ngx.status = ngx.HTTP_CREATED
local user = authUser
-- In case of a password modification
-- TODO: split this into a new function
if string.ends(ngx.var.uri, "password.html") then
-- Check current password against the cached one
if args.currentpassword
and args.currentpassword == cache:get(user.."-password")
then
-- and the new password against the confirmation field's content
if args.newpassword == args.confirm then
local dn = conf["ldap_identifier"].."="..user..","..conf["ldap_group"]
-- Open the LDAP connection
local ldap = lualdap.open_simple(conf["ldap_host"], dn, args.currentpassword)
local password = hash_password(args.newpassword)
-- Modify the LDAP information
if ldap:modify(dn, {'=', userPassword = password }) then
flash("win", t("password_changed"))
-- Reset the password cache
cache:set(user.."-password", args.newpassword, conf["session_timeout"])
return redirect(conf.portal_url.."info.html")
else
flash("fail", t("password_changed_error"))
end
else
flash("fail", t("password_not_match"))
end
else
flash("fail", t("wrong_current_password"))
end
return redirect(conf.portal_url.."password.html")
-- In case of profile modification
-- TODO: split this into a new function
elseif string.ends(ngx.var.uri, "edit.html") then
-- Check that needed arguments exist
if args.givenName and args.sn and args.mail then
-- Unstack mailaliases
local mailalias = {}
if args["mailalias[]"] then
if type(args["mailalias[]"]) == "string" then
args["mailalias[]"] = {args["mailalias[]"]}
end
mailalias = args["mailalias[]"]
end
-- Unstack mail forwards
local maildrop = {}
if args["maildrop[]"] then
if type(args["maildrop[]"]) == "string" then
args["maildrop[]"] = {args["maildrop[]"]}
end
maildrop = args["maildrop[]"]
end
-- Limit domains per user:
-- This ensures that a user already has an email address or an
-- aliases that ends with a specific domain to claim new aliases
-- on this domain.
--
-- I.E. You need to have xxx@domain.org to claim a
-- yyy@domain.org alias.
--
local domains = {}
local ldap = lualdap.open_simple(conf["ldap_host"])
for dn, attribs in ldap:search {
base = conf["ldap_group"],
scope = "onelevel",
sizelimit = 1,
filter = "(uid="..user..")",
attrs = {"mail"}
} do
-- Construct proper emails array
local mail_list = {}
local mail_attr = attribs["mail"]
if type(mail_attr) == "string" then
mail_list = { mail_attr }
elseif type(mail_attr) == "table" then
mail_list = mail_attr
end
-- Filter configuration's domain list to keep only
-- "allowed" domains
for _, domain in ipairs(conf["domains"]) do
for k, mail in ipairs(mail_list) do
if string.ends(mail, "@"..domain) then
if not is_in_table(domains, domain) then
table.insert(domains, domain)
end
end
end
end
end
ldap:close()
local rex = require "rex_pcre"
local rex_flags = rex.flags()
local mail_re = rex.new([[^[\w\.\-+%]+@([^\W_A-Z]+([\-]*[^\W_A-Z]+)*\.)+([^\W\d_]{2,})$]], rex_flags.UTF8 + rex_flags.UCP)
local mails = {}
-- Build an LDAP filter so that we can ensure that email
-- addresses are used only once.
local filter = "(|"
table.insert(mailalias, 1, args.mail)
-- Loop through all the aliases
for k, mail in ipairs(mailalias) do
if mail ~= "" then
-- Check the mail pattern
if not mail_re:match(mail) then
flash("fail", t("invalid_mail")..": "..mail)
return redirect(conf.portal_url.."edit.html")
-- Check that the domain is known and allowed
else
local domain_valid = false
for _, domain in ipairs(domains) do
if string.ends(mail, "@"..domain) then
domain_valid = true
break
end
end
if domain_valid then
table.insert(mails, mail)
filter = filter.."(mail="..mail..")"
else
flash("fail", t("invalid_domain").." "..mail)
return redirect(conf.portal_url.."edit.html")
end
end
end
end
-- filter should look like "(|(mail=my@mail.tld)(mail=my@mail2.tld))"
filter = filter..")"
-- For email forwards, we only need to check that they look
-- like actual emails
local drops = {}
for k, mail in ipairs(maildrop) do
if mail ~= "" then
if not mail_re:match(mail) then
flash("fail", t("invalid_mailforward")..": "..mail)
return redirect(conf.portal_url.."edit.html")
end
table.insert(drops, mail)
end
end
table.insert(drops, 1, user)
-- We now have a list of validated emails and forwards.
-- We need to check if there is a user with a claimed email
-- already before writing modifications to the LDAP.
local dn = conf["ldap_identifier"].."="..user..","..conf["ldap_group"]
local ldap = lualdap.open_simple(conf["ldap_host"], dn, cache:get(user.."-password"))
local cn = args.givenName.." "..args.sn
for dn, attribs in ldap:search {
base = conf["ldap_group"],
scope = "onelevel",
filter = filter,
attrs = {conf["ldap_identifier"], "mail"}
} do
-- Another user with one of these emails has been found.
if attribs[conf["ldap_identifier"]] and attribs[conf["ldap_identifier"]] ~= user then
-- Construct proper emails array
local mail_list = {}
local mail_attr = attribs["mail"]
if type(mail_attr) == "string" then
mail_list = { mail_attr }
elseif type(mail_attr) == "table" then
mail_list = mail_attr
end
for _, mail in ipairs(mail_list) do
if is_in_table(mails, mail) then
flash("fail", t("mail_already_used").." "..mail)
end
end
return redirect(conf.portal_url.."edit.html")
end
end
-- No problem so far, we can write modifications to the LDAP
if ldap:modify(dn, {'=', cn = cn,
givenName = args.givenName,
sn = args.sn,
mail = mails,
maildrop = drops })
then
delete_user_info_cache(user)
-- Ugly trick to force cache reloading
set_headers(user)
flash("win", t("information_updated"))
return redirect(conf.portal_url.."info.html")
else
flash("fail", t("user_saving_fail"))
end
else
flash("fail", t("missing_required_fields"))
end
return redirect(conf.portal_url.."edit.html")
end
end
end
-- hash the user password using sha-512 and using {CRYPT} to uses linux auth system
-- because ldap doesn't support anything stronger than sha1
function hash_password(password)
-- TODO is the password checked by regex? we don't want to
-- allow shell injection
local mkpasswd = io.popen("mkpasswd --method=sha-512 '" ..password:gsub("'", "'\\''").."'")
local hashed_password = "{CRYPT}"..mkpasswd:read()
mkpasswd:close()
return hashed_password
end
-- Compute the user login POST request
-- It authenticates the user against the LDAP base then redirects to the portal
function login()
-- We need these calls since we are in a POST request
ngx.req.read_body()
local args = ngx.req.get_post_args()
local uri_args = ngx.req.get_uri_args()
args.user = string.lower(args.user)
local user = authenticate(args.user, args.password)
if user then
ngx.status = ngx.HTTP_CREATED
set_auth_cookie(user, ngx.var.host)
else
ngx.status = ngx.HTTP_UNAUTHORIZED
flash("fail", t("wrong_username_password"))
end
-- Forward the `r` URI argument if it exists to redirect
-- the user properly after a successful login.
if uri_args.r then
return redirect(conf.portal_url.."?r="..uri_args.r)
else
return redirect(conf.portal_url)
end
end
-- Compute the user logout request
-- It deletes session cached information to invalidate client side cookie
-- information.
function logout()
-- We need this call since we are in a POST request
local args = ngx.req.get_uri_args()
-- Delete user cookie if logged in (that should always be the case)
if is_logged_in() then
delete_cookie()
cache:delete("session_"..authUser)
cache:delete(authUser.."-"..conf["ldap_identifier"]) -- Ugly trick to reload cache
flash("info", t("logged_out"))
end
-- Redirect to portal anyway
return redirect(conf.portal_url)
end
-- Set cookie and redirect (needed to properly set cookie)
function redirect(url)
ngx.log(ngx.NOTICE, "Redirect to: "..url)
return ngx.redirect(url)
end
-- Set cookie and go on with the response (needed to properly set cookie)
function pass()
delete_redirect_cookie()
-- When we are in the SSOwat portal, we need a default `content-type`
if string.ends(ngx.var.uri, "/")
or string.ends(ngx.var.uri, ".html")
or string.ends(ngx.var.uri, ".htm")
then
ngx.header["Content-Type"] = "text/html"
end
return
end

57
init.lua.bak
View file

@ -1,57 +0,0 @@
--
-- init.lua
--
-- This is the initialization file of SSOwat. It is called once at the Nginx
-- server's start.
-- Consequently, all the variables declared (along with libraries and
-- translations) in this file will be *persistent* from one HTTP request to
-- another.
--
-- Remove prepending '@' & trailing 'init.lua'
script_path = string.sub(debug.getinfo(1).source, 2, -9)
-- Include local libs in package.path
package.path = package.path .. ";"..script_path.."?.lua"
-- Load libraries
local json = require "json"
local lualdap = require "lualdap"
local math = require "math"
local hige = require "hige"
local lfs = require "lfs"
local socket = require "socket"
local config = require "config"
-- Persistent shared table
flashs = {}
i18n = {}
-- convert a string to a hex
function tohex(str)
return (str:gsub('.', function (c)
return string.format('%02X', string.byte(c))
end))
end
-- Efficient function to get a random string
function random_string()
local random_bytes = io.open("/dev/urandom"):read(64);
return tohex(random_bytes);
end
-- Load translations in the "i18n" above table
local locale_dir = script_path.."portal/locales/"
for file in lfs.dir(locale_dir) do
if string.sub(file, -4) == "json" then
local lang = string.sub(file, 1, 2)
local locale_file = io.open(locale_dir..file, "r")
i18n[lang] = json.decode(locale_file:read("*all"))
end
end
-- Path of the configuration
conf_path = "/etc/ssowat/conf.json"
-- You should see that in your Nginx error logs by default
ngx.log(ngx.INFO, "SSOwat ready")