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module(..., package.seeall)
-- Load libraries
require("modelfunctions")
require("validator")
require("fs")
require("posix")
require("getopts")
-- Set variables
local configfile = "/etc/ssh/sshd_config"
local processname = "sshd"
local packagename = "openssh"
local header = "SSH"
local default = {
Port = 22,
ListenAddress = "0.0.0.0",
-- PermitRootLogin = true,
PasswordAuthentication = true,
UseDNS = true,
}
-- ################################################################################
-- LOCAL FUNCTIONS
local function parseconfigfile(file)
file = file or ""
local retval = {}
for line in string.gmatch(file, "([^\n]+)\n?") do
line = string.gsub(line, "#.*$", "")
if line and line ~= "" then
table.insert(retval, {})
for word in string.gmatch(line, "%S+") do
table.insert(retval[#retval], word)
end
end
end
return retval
end
-- return "Yes" or "No" on true/false or value as string
local function config_value(value)
if type(value) == "boolean" then
if value then
return "Yes"
else
return "No"
end
end
return tostring(value)
end
local function validateconfig(config)
if config.ListenAddress and not validator.is_ipv4(config.ListenAddress) then
return false, { ['ListenAddress'] = "You entered invalid IP", }
end
if config.Port and not validator.is_port(config.Port) then
return false, { ['Port'] = "You entered invalid Port", }
end
return true
end
-- ################################################################################
-- PUBLIC FUNCTIONS
-- valid keywords and default config
function read_config()
local conf = {}
local f = io.open(configfile, "r")
local line, key, _, k, v
if not f then
return nil
end
-- clone default conf
for k, v in pairs(default) do
conf[k] = v
end
for line in f:lines() do
line = string.gsub(line, "#.*", "")
for key, _ in pairs(default) do
local k,v = string.match(line, "^("..key..")%s+(.*)")
if k then
conf[k] = v
end
end
end
f:close()
return conf
end
function startstop_service(action)
return modelfunctions.startstop_service(processname, action)
end
function getstatus()
return modelfunctions.getstatus(processname, packagename, header .. " status")
end
function getconfigfile()
return modelfunctions.getfiledetails(configfile)
end
function setconfigfile(filedetails)
filedetails.value.filename.value = configfile
return modelfunctions.setfiledetails(filedetails)
end
function write_config(config)
local k, v, lines, i,j
local errtxt = {}
local conf = {}
local validated, errtxt = validateconfig(config)
if not validated then
return false, errtxt
end
-- filter out unsupported keys
for k,v in pairs(default) do
if (config[k] == nil) or (config[k] == "") then
conf[k] = "no"
else
conf[k] = config[k]
end
end
lines = fs.read_file_as_array(configfile) or {}
for i, j in ipairs(lines) do
for k, v in pairs(conf) do
if string.match(j, "^#?"..k.."%s+") then
lines[i] = k .. " " .. config_value(v)
conf[k] = nil
end
end
end
-- append config opts to end
for k,v in pairs(conf) do
table.insert(lines, k .. " " .. config_value(v))
end
-- write file
posix.mkdir(posix.dirname(configfile))
local f = io.open(configfile, "w")
for _,i in ipairs(lines) do
f:write(i.."\n")
end
f:close()
return true
end
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