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module (..., package.seeall)
require("modelfunctions")
require("posix")
format = require("acf.format")
fs = require("acf.fs")
processinfo = require("acf.processinfo")
validator = require("acf.validator")
date = require("acf.date")
local processname = "openvpn"
local packagename = "openvpn"
local configfile = "/etc/openvpn/openvpn.conf"
local baseurl = "/etc/openvpn/"
local certurl = "/etc/openvpn/openvpn_certs/"
local path = "PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin "
function set_processname(p)
processname = p
configfile = "/etc/openvpn/"..processname..".conf"
certurl = "/etc/openvpn/"..processname.."_certs/"
end
-- ################################################################################
-- LOCAL FUNCTIONS
local function config_content( f )
local config = {}
local lines = format.parse_linesandwords(fs.read_file(f) or "", "[#;]")
-- there can be multiple entries
for i,linetable in ipairs(lines) do
if config[linetable[1]] then
config[linetable[1]] = config[linetable[1]] .. "\n" .. (table.concat(linetable, " ", 2) or "")
else
config[linetable[1]] = table.concat(linetable, " ", 2) or ""
end
end
config.name = f
if config.remote then
config.remoteport = string.match ( config.remote, "^%S+%s+(%S*)" )
end
if not ( config.log ) then
config.log = config["log-append"]
end
if not ( config["max-clients"] ) then
config["max-clients"] = "Unlimited"
end
if not ( config["local"] ) then
config["local"] = "0.0.0.0"
end
return config
end
local function check_valid_config (config)
config.errtxt = nil
if not (config.client) or not (config.ca) or not (config.cert) or not (config.key) or not (config.dev) or not (config.proto) or not (config.remote) then
config.errtxt = ""
if not (config.ca) then
config.errtxt = config.errtxt .. "Check CA; "
end
if not (config.cert) then
config.errtxt = config.errtxt .. "Check CERT; "
end
if not (config.key) then
config.errtxt = config.errtxt .. "Check KEY; "
end
if not (config.dev) then
config.errtxt = config.errtxt .. "Check DEV; "
end
if not (config.proto) then
config.errtxt = config.errtxt .. "Check PROTO; "
end
if (config.client) or not (config.ca) or not (config.cert) or not (config.key) or not (config.dev) or not (config.proto) or not (config.port) then
config.type = nil
else
config.type = "server"
config.errtxt = nil
end
else
config.type = "client"
config.errtxt = nil
end
if not (config.type) then config.type = "unknown" end
return config.type, config.errtxt
end
local function clientlist( statusfile )
local clientlist = {}
local routinglist = {}
local datechange = {}
local list = {}
if (statusfile) then
local f = fs.read_file_as_array( statusfile )
local clientlst = false
local routinglst = false
if ( f ) then
for k,v in ipairs(f) do
local col = format.string_to_table(v, ",")
if ( col[1] == "ROUTING TABLE" ) or ( col[1] == "GLOBAL STATS" ) then
clientlst = false
routinglst = false
end
if ( clientlst ) then
table.insert(clientlist, { CN=col[1],
REALADDR=col[2],
BYTESRCV=col[3],
BYTESSND=col[4],
CONN=col[5] } )
end
if ( routinglst ) then
table.insert(routinglist, { VIRTADDR=col[1],
CN=col[2],
REALADDR=col[3],
LAST=col[4] } )
if (col[4]) then
local month,day,hour,min,sec,year = string.match(col[4],"^%S+%s+(%S+)%s+(%S+)%s+(%d%d):(%d%d):(%d%d)%s+(%S+)")
table.insert(datechange, { year=year,
month=date.abr_month_num(month),
day=day,
hour=hour,
min=min,
sec=sec } )
end
end
if ( col[1] == "Virtual Address" ) then
routinglst = true
end
if ( col[1] == "Common Name" ) then
clientlst = true
end
end
end
end
-- JOIN 'CLIENT_LIST' and 'ROUTING_LIST' TABLES INTO ONE TABLE AND LATER ON PRESENT THIS TABLE
for k,v in ipairs(clientlist) do
for kk,vv in ipairs(routinglist) do
if ( v.CN == vv.CN ) then
table.insert(list, { CN=v.CN, REALADDR=v.REALADDR, BYTESRCV=v.BYTESRCV, BYTESSND=v.BYTESSND, VIRTADDR=vv.VIRTADDR, CONN=v.CONN, LAST = LAST } )
end
end
end
local lastdatechangetxt, lastdatechangediff
if ( #clientlist > 0 ) then
local lastdatechange = date.date_to_seconds(datechange)
lastdatechangetxt = os.date("%c", lastdatechange[#lastdatechange])
lastdatechangediff = os.time() - os.date(lastdatechange[table.maxn(lastdatechange)])
if (lastdatechangediff > 60) then
lastdatechangediff = math.modf(lastdatechangediff / 60) .. " min"
else
lastdatechangediff = lastdatechangediff .. " sec"
end
end
return list, #clientlist, lastdatechangetxt, lastdatechangediff
end
-- ################################################################################
-- PUBLIC FUNCTIONS
function getstatus()
return modelfunctions.getstatus(processname, packagename, "OpenVPN Status")
end
function get_startstop(self, clientdata)
return modelfunctions.get_startstop(processname)
end
function startstop_service(self, startstop, action)
return modelfunctions.startstop_service(startstop, action)
end
function getclientinfo()
local config = config_content(configfile)
return cfe({ type="structure", value=clientlist(config.status), label="Client info" })
end
function get_config()
local config = config_content(configfile)
check_valid_config(config)
if config.type == "server" then
local clientlist, client_count, client_lastupdate, client_lastdatechangediff = clientlist(config.status)
config["client_lastupdate"] = client_lastupdate or "?"
config["client_lastdatechangediff"] = client_lastdatechangediff or "? min"
config["client_count"] = client_count or 0
end
return cfe({ type="structure", value=config, label="OpenVPN Config" })
end
function get_logfile(f)
local config = config_content(configfile)
return cfe({ value=config.log or "", label="Log file" })
end
function get_filecontent()
--FIXME validate
return modelfunctions.getfiledetails(configfile)
end
function update_filecontent(self, filedetails)
--FIXME validate
return modelfunctions.setfiledetails(self, filedetails, {configfile})
end
function list_certs()
local list = {}
for file in fs.find(".*%.pem", certurl) do
list[#list+1] = file
end
return cfe({ type="list", value=list, label="OpenVPN Certificates" })
end
function delete_cert(certname)
local list = list_certs()
local retval = cfe({ label="Delete Certificate result", errtxt="Invalid cert name" })
for i,cert in ipairs(list.value) do
if cert == certname then
os.remove(certname)
retval.value = "Certificate deleted"
retval.errtxt = nil
break
end
end
return retval
end
function new_upload_cert()
local value = {}
value.cert = cfe({ type="raw", value=0, label="Certificate", descr='File must be a password protected ".pfx" file' })
value.password = cfe({ label="Certificate Password" })
value.name = cfe({ label="Certificate Local Name" })
return cfe({ type="group", value=value })
end
function upload_cert(self, newcert)
local success = true
-- Trying to upload a cert/key
-- The way haserl works, cert contains the temporary file name
-- First, get the cert
local cmd, f, cmdresult
if validator.is_valid_filename(newcert.value.cert.value, "/tmp/") and fs.is_file(newcert.value.cert.value) then
cmd = path .. "openssl pkcs12 -in "..format.escapespecialcharacters(newcert.value.cert.value).." -out "..format.escapespecialcharacters(newcert.value.cert.value).."cert.pem -password pass:"..format.escapespecialcharacters(newcert.value.password.value).." -nokeys -clcerts 2>&1"
f = io.popen(cmd)
cmdresult = f:read("*a")
f:close()
local filestats = posix.stat(newcert.value.cert.value.."cert.pem")
if not filestats or filestats.size == 0 then
newcert.value.cert.errtxt = "Could not open certificate\n"..cmdresult
success = false
end
else
newcert.value.cert.errtxt = "Invalid certificate"
success = false
end
-- Now, get the key and the ca certs
if success then
cmd = path .. "openssl pkcs12 -in "..format.escapespecialcharacters(newcert.value.cert.value).." -out "..format.escapespecialcharacters(newcert.value.cert.value).."key.pem -password pass:"..format.escapespecialcharacters(newcert.value.password.value).." -nocerts -nodes 2>&1"
f = io.popen(cmd)
cmdresult = f:read("*a")
f:close()
filestats = posix.stat(newcert.value.cert.value.."key.pem")
if not filestats or filestats.size == 0 then
newcert.value.cert.errtxt = "Could not find key\n"..cmdresult
success = false
end
cmd = path .. "openssl pkcs12 -in "..format.escapespecialcharacters(newcert.value.cert.value).." -out "..format.escapespecialcharacters(newcert.value.cert.value).."ca.pem -password pass:"..format.escapespecialcharacters(newcert.value.password.value).." -nokeys -cacerts 2>&1"
f = io.popen(cmd)
cmdresult = f:read("*a")
f:close()
filestats = posix.stat(newcert.value.cert.value.."ca.pem")
if not filestats or filestats.size == 0 then
newcert.value.cert.errtxt = "Could not find CA certs\n"..cmdresult
success = false
end
end
if newcert.value.name.value == "" then
newcert.value.name.errtxt = "Cannot be blank"
success = false
elseif posix.stat(certurl..newcert.value.name.value.."-cert.pem") or posix.stat(certurl..newcert.value.name.value.."-key.pem") or posix.stat(certurl..newcert.value.name.value.."-ca.pem") then
newcert.value.name.errtxt = "Certificate of this name already exists"
success = false
end
if success then
if not posix.stat(certurl) then
posix.mkdir(certurl)
end
-- copy the keys
fs.move_file(newcert.value.cert.value.."cert.pem", certurl..newcert.value.name.value.."-cert.pem")
fs.move_file(newcert.value.cert.value.."key.pem", certurl..newcert.value.name.value.."-key.pem")
fs.move_file(newcert.value.cert.value.."ca.pem", certurl..newcert.value.name.value.."-ca.pem")
posix.chmod(certurl..newcert.value.name.value.."-key.pem", "rw-------")
else
newcert.errtxt = "Failed to upload certificate"
end
-- Delete the temporary files
if validator.is_valid_filename(newcert.value.cert.value, "/tmp/") and fs.is_file(newcert.value.cert.value) then
os.remove(newcert.value.cert.value.."cert.pem")
os.remove(newcert.value.cert.value.."key.pem")
os.remove(newcert.value.cert.value.."ca.pem")
end
return newcert
end
view_cert = function(certname)
local cmdresult = "Invalid cert name"
if not string.find(certname, "/") then
certname = certurl..certname
end
if validator.is_valid_filename(certname, certurl) or validator.is_valid_filename(certname, baseurl) then
local cmd = path .. "openssl x509 -in "..format.escapespecialcharacters(certname).." -noout -text"
local f = io.popen(cmd)
cmdresult = f:read("*a")
f:close()
cmdresult = cmdresult .. "Content:\n" .. (fs.read_file(certname) or "")
end
return cfe({ type="table", value={name=certname, value=cmdresult}, label="Certificate" })
end
generate_dh_params = function()
local cmd = path .. "openssl dhparam -out "..certurl.."dh1024.pem 1024 2>&1"
f = io.popen(cmd)
local cmdresult = f:read("*a")
f:close()
return cfe({ value=cmdresult, label="Generate Diffie Hellman parameters result" })
end
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