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local mymodule = {}
-- Load libraries
modelfunctions = require("modelfunctions")
posix = require("posix")
fs = require("acf.fs")
format = require("acf.format")
validator = require("acf.validator")
subprocess = require("subprocess")
-- Set variables
local processname = "radiusd"
local packagename = "freeradius3"
local baseurl = "/etc/raddb"
local owner = "radius"
local group = "root"
local config
local configtable
-- ################################################################################
-- LOCAL FUNCTIONS
local is_valid_filename = function(filename)
local dirname = posix.dirname(filename)
return validator.is_valid_filename(filename) and string.match(dirname, baseurl) and not string.match(dirname, "%.%.")
end
local get_config = function()
if config then return true end
local code, cmdresult = subprocess.call_capture({"radiusd", "-XC"})
if 0 ~= code then
return false, string.match(cmdresult, "([^\n]+)\n$")
end
config = {}
for line in string.gmatch(cmdresult, "[^\n]+") do
if string.match(line, "^including") then
elseif string.match(line, "^Using") then
elseif string.match(line, "^reading") then
elseif string.match(line, "^Ignoring") then
--elseif string.match(line, "^Configuration ") then
elseif string.match(line, "^radiusd: ") then
elseif string.match(line, "^rlm_passwd: ") then
elseif string.match(line, "^%[/etc/raddb/") then
elseif string.match(line, "^%s*#") then
elseif string.match(line, "^%c") then
else
-- We want to remove spaces at beginning or end, and comments from end (being careful of quotes)
local tmp = string.match(line, "%S.*")
local nextcomment = string.find(tmp, "#")
local quotestart, quoteend
quotestart, quoteend = string.find(tmp, '%b""')
while nextcomment and (nextcomment < #tmp) and quotestart and (quotestart < nextcomment) do
if nextcomment < quoteend then
nextcomment = string.find(tmp, "#", nextcomment+1)
else
quotestart, quoteend = string.find(tmp, '%b""', quoteend+1)
end
end
if nextcomment then
tmp = string.sub(tmp, 1, nextcomment-1)
end
config[#config+1] = tmp
end
end
config[#config] = nil
-- At this point, every line should have {, =, or }
-- We will parse the lines to create a table structure
function parselines(index)
local result = {}
local i=index
local name,value
while i<#config do
-- Look for = first because line might contain { or }
if string.find(config[i], '=') then
name, value = string.match(config[i], "(.*%S)%s*=%s*(.*)")
if string.find(value, "^\".*\"$") then
value = string.sub(value, 2, -2)
end
result[#result+1] = {name=name, value=value}
i = i+1
elseif string.find(config[i], '}') then
break
elseif string.find(config[i], '{') then
name = string.match(config[i], "(.*%S)%s*{")
value, i = parselines(i+1)
result[#result+1] = {name=name, value=value}
else
mymodule.logevent("radiusd bad config line:"..config[i])
end
end
return result, i+1
end
configtable = parselines(1)
config = table.concat(config,"\n")
return true
end
local get_passwd_files = function()
local files
local configs
local result,errtxt = get_config()
if result then
-- Find the files by searching for modules / passwd
files = {}
configs = {}
for i,first in ipairs(configtable) do
if string.find(first.name, "^modules$") then
for j,second in ipairs(first.value) do
if string.find(second.name, "^passwd ") then
for k,third in ipairs(second.value) do
if string.find(third.name, "^filename$") then
files[#files+1] = third.value
configs[#configs+1] = second.value
end
end
end
end
end
end
end
return files, errtxt, configs
end
local parse_passwd_config = function(config)
local retval = {filename="", delimiter=":", fields={}, key={}, allowmultiplekeys=false}
for i,l in ipairs(config) do
if string.match(l.name, "^delimiter$") then
retval.delimiter = l.value
elseif string.match(l.name, "^allowmultiplekeys$") then
retval.allowmultiplekeys = (l.value == "yes")
elseif string.match(l.name, "^format$") then
-- ex. format = "*User-Name:Crypt-Password:"
for field in string.gmatch(l.value, "([^:]*):?") do
field = field or ""
retval.fields[#retval.fields+1] = string.match(field, "^[*~=,]*(.*)")
if string.match(field, "^%*,") then
retval.key.index = #retval.fields
retval.key.multiple = true
elseif string.match(field, "^%*") then
retval.key.index = #retval.fields
retval.key.multiple = false
end
end
end
end
return retval
end
local b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./"
local mksalt = function()
local file = io.open("/dev/urandom")
local str = ""
if file == nil then return nil end
for i = 1,16 do
local offset = (string.byte(file:read(1)) % 64) + 1
str = str .. string.sub (b64, offset, offset)
end
return str
end
-- ################################################################################
-- PUBLIC FUNCTIONS
function mymodule.get_status()
return modelfunctions.getstatus(processname, packagename, "Freeradius Status")
end
function mymodule.get_startstop(self, clientdata)
return modelfunctions.get_startstop(processname)
end
function mymodule.startstop_service(self, startstop, action)
return modelfunctions.startstop_service(startstop, action)
end
function mymodule.get_file(self, clientdata)
local filename = clientdata.filename
return modelfunctions.getfiledetails(filename, is_valid_filename)
end
function mymodule.update_file(self, filedetails)
local ret = modelfunctions.setfiledetails(self, filedetails, is_valid_filename)
if not ret.errtxt then
posix.chmod(filedetails.value.filename.value, "rw-r-----")
posix.chown(filedetails.value.filename.value, posix.getpasswd(owner, "uid") or 0, posix.getpasswd(group, "gid") or 0)
end
return ret
end
function mymodule.list_files()
local retval = {}
for file in fs.find(null, baseurl) do
local details = fs.stat(file)
if details.type == "regular" then
details.filename = file
table.insert(retval, details)
end
end
table.sort(retval, function(a,b) return a.filename < b.filename end)
return cfe({ type="structure", value=retval, label="List of Freeradius files" })
end
function mymodule.getnewfile()
local filename = cfe({ label="File Name", descr="Must be in "..baseurl })
return cfe({ type="group", value={filename=filename}, label="Freeradius File" })
end
function mymodule.createfile(self, filedetails)
local success = true
local path = string.match(filedetails.value.filename.value, "^%s*(.*%S)%s*$") or ""
if not string.find(path, "/") then
path = baseurl.."/"..path
end
if not is_valid_filename(path) then
success = false
filedetails.value.filename.errtxt = "Invalid filename"
else
if not fs.is_dir(baseurl) then fs.create_directory(baseurl) end
if posix.stat(path) then
success = false
filedetails.value.filename.errtxt = "Filename already exists"
end
end
if success then
fs.create_file(path)
else
filedetails.errtxt = "Failed to Create File"
end
return filedetails
end
function mymodule.getdeletefile(self, clientdata)
local retval = {}
retval.filename = cfe({ label="File Name", value=clientdata.filename or "" })
return cfe({ type="group", value=retval, label="Delete Freeradius File" })
end
function mymodule.deletefile(self, delfile)
delfile.errtxt = "Failed to delete Freeradius File - invalid filename"
for i,file in ipairs(mymodule.list_files().value) do
if delfile.value.filename.value == file.filename then
delfile.errtxt = nil
os.remove(delfile.value.filename.value)
break
end
end
return delfile
end
function mymodule.list_passwd_files()
local retval = {}
local files,errtxt = get_passwd_files()
if files then
for i,file in ipairs(files) do
local details = fs.stat(file)
details.filename = file
table.insert(retval, details)
end
table.sort(retval, function(a,b) return a.filename < b.filename end)
end
return cfe({ type="structure", value=retval, label="List of Freeradius passwd files", errtxt=errtxt })
end
local get_passwd_file = function(self, clientdata)
local retval = cfe({ type="group", value={}, label="Freeradius passwd file" })
retval.value.filename = cfe({ type="select", label="File name", option ={}, key=true, seq=1 })
local files,configs,passwdconfig
files,retval.errtxt,configs = get_passwd_files()
if files then
retval.value.filename.option = files
self.handle_clientdata(retval, clientdata)
if retval.value.filename.value then
retval.value.filename.errtxt = "Invalid selection"
for i,f in ipairs(files) do
if f == retval.value.filename.value then
retval.value.filename.errtxt = nil
retval.value.filename.readonly = true
passwdconfig = parse_passwd_config(configs[i])
break
end
end
end
end
-- return the CFE structure and the config info for this filename
return retval, passwdconfig
end
function mymodule.view_passwd_file(self, clientdata)
local retval,passwdconfig = get_passwd_file(self, clientdata)
if passwdconfig then
-- We have a valid filename, now parse the file using the format from the config
retval.value.fields = cfe({ type="structure", value=passwdconfig.fields, label="Fields" })
retval.value.data = cfe({ type="structure", value={}, label="Data" })
local content = fs.read_file(retval.value.filename.value) or ""
for line in string.gmatch(content, "[^\n]+") do
retval.value.data.value[#retval.value.data.value+1] = format.string_to_table(line, format.escapemagiccharacters(passwdconfig.delimiter))
end
end
return retval
end
function mymodule.get_passwd_entry(self, clientdata)
local retval,passwdconfig = get_passwd_file(self, clientdata)
retval.label = "Freeradius passwd entry"
retval.value.entry = cfe({ label="Entry index", key=true, seq=2 })
self.handle_clientdata(retval, clientdata)
if passwdconfig then
-- The filename is valid, and we should create the fields
retval.value.fields = cfe({ type="group", value={}, label="Fields", seq=3, delimiter=passwdconfig.delimiter })
retval.value.entry.errtxt = "Invalid entry"
local content = fs.read_file(retval.value.filename.value) or ""
local maxcount = 0
local entry = tonumber(retval.value.entry.value) or 0
local entryline = ""
local i=1
for line in string.gmatch(content, "[^\n]+") do
local _,count = string.gsub(line, format.escapemagiccharacters(passwdconfig.delimiter), " ")
maxcount = math.max(maxcount, count)
if i == entry then
retval.value.entry.readonly = true
retval.value.entry.errtxt = nil
entryline = format.string_to_table(line, format.escapemagiccharacters(passwdconfig.delimiter))
end
i = i+1
end
for i=1, math.max(#passwdconfig.fields, maxcount+1), 1 do
local label = passwdconfig.fields[i]
if not label or label == "" then
label = "Unlabeled field "..i
end
if label == "Crypt-Password" then
-- We do not return the encrypted password, but will leave unchanged if blank
retval.value.fields.value[tostring(i)] = cfe({ type="password", label=label, descr="Leave blank to leave unchanged", seq=i })
retval.value.fields.value["algorithm"..i] = cfe({ type="select", value="$6$", label="Algorithm", option={{value="", label="DES"}, {value="$1$", label="MD5"}, {value="$2$", label="Blowfish"}, {value="$2a$", label="eksblowfish"}, {value="$5$", label="SHA-256"}, {value="$6$", label="SHA-512"}}, seq=i })
-- Hide the algorithm so user does not use insecure algorithms unless they REALLY want to
retval.value.fields.value["algorithm"..i].type = "hidden"
else
retval.value.fields.value[tostring(i)] = cfe({ label=label, value=entryline[i] or "", seq=i })
end
end
end
return retval
end
function mymodule.update_passwd_entry(self, entry)
-- The password/index fields have already been validated
if not entry.value.fields then
entry.errtxt = "Invalid passwd entry"
else
-- The only fields we can validate are the password algorithms
-- Don't search for 'select' cfe's because they have been changed to hidden
for n,v in pairs(entry.value.fields.value) do
if v.option and not modelfunctions.validateselect(v) then
entry.errtxt = "Invalid passwd entry"
end
end
if not entry.errtxt then
-- Set the value
local content = fs.read_file_as_array(entry.value.filename.value) or {}
local values = {}
for n,v in pairs(entry.value.fields.value) do
if v.type=="password" and v.value=="" then
-- Keep the same password
local line = format.string_to_table(content[tonumber(entry.value.entry.value)], entry.value.fields.delimiter) or {}
values[tonumber(n)] = line[tonumber(n)] or ""
elseif v.type=="password" then
local salt = entry.value.fields.value["algorithm"..n].value
if salt == "" then
salt = string.sub(mksalt(), 1, 2)
else
salt = salt..(mksalt() or "").."$"
end
local crypt,errtxt = posix.crypt(v.value, salt)
if crypt then
values[tonumber(n)] = crypt
else
v.errtxt = errtxt
entry.errtxt = "Invalid passwd entry"
break
end
elseif tonumber(n) then
values[tonumber(n)] = v.value
end
end
if not entry.errtxt then
content[tonumber(entry.value.entry.value)] = table.concat(values, entry.value.fields.delimiter)
fs.write_file(entry.value.filename.value, table.concat(content, "\n"))
end
end
end
return entry
end
return mymodule
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