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
|
module(..., package.seeall)
-- Load libraries
require("modelfunctions")
require("validator")
require("fs")
require("format")
-- Set variables
local configfile = "/etc/ssh/sshd_config"
local processname = "sshd"
local packagename = "openssh-server"
local header = "SSH"
local path="PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin "
-- ################################################################################
-- LOCAL FUNCTIONS
-- 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 validate_config(config)
local success = true
if not validator.is_ipv4(config.value.ListenAddress.value) then
config.value.ListenAddress.errtxt = "Invalid IP"
success = false
end
if not validator.is_port(config.value.Port.value) then
config.value.Port.value = "Invalid Port"
success = false
end
return success, config
end
-- ################################################################################
-- PUBLIC FUNCTIONS
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)
return modelfunctions.setfiledetails(filedetails, {configfile})
end
function read_config()
local output = {}
output.Port = cfe({ value=22, label="Port" })
output.ListenAddress = cfe({ value="0.0.0.0", label="Listen address" })
output.PermitRootLogin = cfe({ type="boolean", value=true, label="Permit Root Login" })
output.PasswordAuthentication = cfe({ type="boolean", value=true, label="Password Authentication" })
output.UseDNS = cfe({ type="boolean", value=true, label="Use DNS" })
local config = format.parse_configfile(fs.read_file(configfile) or "")
if config then
output.Port.value = config.Port or output.Port.value
output.ListenAddress.value = config.ListenAddress or output.ListenAddress.value
output.PermitRootLogin.value = not (config.PermitRootLogin == "no")
output.PasswordAuthentication.value = not (config.PasswordAuthentication == "no")
output.UseDNS.value = not (config.UseDNS == "no")
end
return cfe({ type="group", value=output, label="OpenSSH Config" })
end
function update_config(config)
local success, config = validate_config(config)
if success then
for name,val in pairs(config.value) do
val.line = name.." "..config_value(val.value)
end
local lines = {}
for line in string.gmatch(fs.read_file(configfile) or "", "([^\n]*)\n?") do
for name,val in pairs(config.value) do
if val.line and string.find(line, "^%s*#?%s*"..name) then
if string.find(line, "^%s*#") then
lines[#lines+1] = val.line
else
line = val.line
end
val.line = nil
end
end
lines[#lines+1] = line
end
for name,val in pairs(config.value) do
if val.line then
lines[#lines+1] = val.line
val.line = nil
end
end
fs.write_file(configfile, string.gsub(table.concat(lines, "\n"), "\n+$", ""))
else
config.errtxt = "Failed to save config"
end
return config
end
function list_conn_peers()
local output = {}
local netstat = {}
local ps = {}
local who = {}
config = read_config()
local f = io.popen( path .. 'netstat -lnaW | grep "ESTABLISHED"' )
local flines = format.string_to_table(f:read("*a"), "\n")
f:close()
local g = io.popen( path .. 'netstat -laW | grep "ESTABLISHED"' )
local glines = format.string_to_table(g:read("*a"), "\n")
g:close()
for i,line in ipairs(flines) do
local loc, peer = string.match(line, "^%S+%s+%S+%s+%S+%s+(%S+)%s+(%S+)")
if loc then
peer = string.match(peer, "%d+%.%d+%.%d+%.%d+")
if string.find(loc, ":"..config.value.Port.value.."$") and peer then
if not netstat[peer] then
local name = string.match(glines[i], "^%S+%s+%S+%s+%S+%s+%S+%s+(%S+)")
name = string.gsub(name, ":.*", "")
netstat[peer] = {cnt=0, name=name}
end
netstat[peer].cnt = netstat[peer].cnt + 1
end
end
end
local f = io.popen( path .. 'ps | grep "sshd:" | grep -v "grep"' )
for line in f:lines() do
table.insert(ps, string.match(line,"@(%S+)"))
end
f:close()
for peer,v in pairs(netstat) do
if not (netstat[peer].tty) then netstat[peer].tty = {} end
local cmd = path .. 'who | egrep "' .. peer
if v.name and v.name ~= "" then cmd = cmd .. '|' .. v.name end
cmd = cmd .. '" | egrep "' .. table.concat(ps, "|") .. '"'
local f = io.popen( cmd )
for line in f:lines() do
local user,tty,idle,time = string.match(line, "^(%S*)%s*(%S*)%s*(%S*)%s*(%S*%s*%S*%s*%S*)")
table.insert(netstat[peer].tty, {
user=user,
tty=tty,
idle=idle,
time=time,
})
end
f:close()
table.insert(output, v)
output[#output]['host'] = peer
end
return output
end
function list_users()
local users = {"root"}
for dir in fs.find(null, "/home/") do
local user = basename(dir)
if fs.is_dir(dir) and not string.find(user, "^%.") then users[#users + 1] = user end
end
return cfe({ type="list", value=users, label="User list" })
end
function list_auths(user)
user = user or "root"
local cmdresult = cfe({ type="group", value={}, label="Authorized Key List" })
cmdresult.value.user = cfe({ value=user, label="User" })
cmdresult.value.auth = cfe({ type="structure", value={}, label="Authorized Keys" })
if not user == "root" and (string.find(user, "/") or not fs.is_dir("/home/"..user)) then
cmdresult.value.user.errtxt = "Invalid user"
else
local file = "/"..user.."/.ssh/authorized_keys"
if user ~= "root" then file = "/home"..file end
local data = fs.read_file(file) or ""
for line in string.gmatch(data, "([^\n]+)\n?") do
local typ,key,id = string.match(line, "(%S+)%s(%S+)%s(%S+)")
table.insert(cmdresult.value.auth.value, {key=key, id=id})
end
end
return cmdresult
end
function delete_auth(user, auth)
user = user or "root"
local cmdresult = cfe({ value="Failed to delete key", errtxt="User not found", label="Delete Authorized Key Result" })
if user == "root" or (not string.find(user, "/") and fs.is_dir("/home/"..user)) then
cmdresult.errtxt = "Key not found"
local file = "/"..user.."/.ssh/authorized_keys"
if user ~= "root" then file = "/home"..file end
local data = fs.read_file(file)
if data then
local newdata = {}
for line in string.gmatch(data, "([^\n]+)\n?") do
if string.match(line, "%s(%S+)$") == auth then
cmdresult.value = "Deleted key"
cmdresult.errtxt = nil
else
newdata[#newdata + 1] = line
end
end
if not cmdresult.errtxt then
fs.write_file(file, table.concat(newdata, "\n"))
end
end
end
return cmdresult
end
function get_auth(user)
user = user or "root"
local cmdresult = cfe({ type="group", value={}, label="Authorized Key List" })
cmdresult.value.user = cfe({ value=user, label="User" })
cmdresult.value.cert = cfe({ type="longtext", label="SSH Certificate Contents" })
return cmdresult
end
function create_auth(authstr)
authstr.value.user.value = authstr.value.user.value or "root"
local success = true
if not authstr.value.user.value == "root" and (string.find(authstr.value.user.value, "/") or not fs.is_dir("/home/"..authstr.value.user.value)) then
authstr.value.user.errtxt = "Invalid user"
success = false
end
-- not sure how to validate the cert
authstr.value.cert.value = string.match(authstr.value.cert.value, "^[%s\n]*(.*%S)[%s\n]*$") or ""
if authstr.value.cert.value == "" then
authstr.value.cert.errtxt = "Cert cannot be empty"
success = false
elseif not string.match(authstr.value.cert.value, "ssh%-%S+%s%S+%s%S+$") then
authstr.value.cert.errtxt = "Invalid format"
success = false
end
if success then
local file = "/"..authstr.value.user.value.."/.ssh/authorized_keys"
if authstr.value.user.value ~= "root" then file = "/home"..file end
local data = fs.read_file(file) or ""
if string.match(data, "^[%s\n]*$") then
data = authstr.value.cert.value
else
data = string.match(data, "^[%s\n]*(.*%S)[%s\n]*$")
for id in string.gmatch(data, "([^\n]+)\n?") do
if string.match(id, "%S+$") == string.match(authstr.value.cert.value, "%S+$") then
authstr.value.cert.errtxt = "This ID already exists"
success = false
break
end
end
data = string.gsub(data, "\n*$", "\n"..authstr.value.cert.value)
end
if success then
fs.write_file(file, data)
end
end
if not success then
authstr.errtxt = "Failed to add key"
end
return authstr
end
|