summaryrefslogtreecommitdiffstats
path: root/openvpn-model.lua
blob: 59be82c4f342a651a4108c8dec28b5038eb905be (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
module (..., package.seeall)

require ("modelfunctions")
require ("posix")
require ("format")
require ("fs")
require ("processinfo")
require ("validator")
require ("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 startstop_service(action)
	return modelfunctions.startstop_service(processname, 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(filedetails)
	--FIXME validate
	return modelfunctions.setfiledetails(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(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