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1 | #!/bin/bash | |
2 | ############################################################################### | |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
5 | # Copyright (C) 2017 IPFire Network Development Team # | |
6 | # # | |
7 | # This program is free software: you can redistribute it and/or modify # | |
8 | # it under the terms of the GNU General Public License as published by # | |
9 | # the Free Software Foundation, either version 3 of the License, or # | |
10 | # (at your option) any later version. # | |
11 | # # | |
12 | # This program is distributed in the hope that it will be useful, # | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
15 | # GNU General Public License for more details. # | |
16 | # # | |
17 | # You should have received a copy of the GNU General Public License # | |
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
19 | # # | |
20 | ############################################################################### | |
21 | ||
22 | WIRELESS_NETWORK_SUPPORTED_PSK_MODES="WPA2-PSK-SHA256 WPA2-PSK WPA-PSK-SHA256 WPA-PSK" | |
23 | ||
24 | WIRELESS_NETWORK_SUPPORTED_MODES="${WIRELESS_NETWORK_SUPPORTED_PSK_MODES} NONE" | |
25 | ||
26 | WIRELESS_NETWORK_CONFIG_SETTINGS="EAP_MODES ENCRYPTION_MODES PRIORITY PSK SSID" | |
27 | ||
28 | cli_wireless_network() { | |
29 | case "${1}" in | |
30 | new) | |
31 | wireless_network_new "${@:2}" | |
32 | ;; | |
33 | destroy) | |
34 | wireless_network_destroy "${@:2}" | |
35 | ;; | |
36 | *) | |
37 | local ssid="${1}" | |
38 | local key="${2//-/_}" | |
39 | shift 2 | |
40 | ||
41 | if ! wireless_network_exists "${ssid}"; then | |
42 | error "No such wireless network: ${ssid}" | |
43 | return ${EXIT_ERROR} | |
44 | fi | |
45 | ||
46 | # Convert SSID into usable format | |
47 | local handle="$(wireless_network_hash "${ssid}")" | |
48 | ||
49 | case "${key}" in | |
50 | encryption_mode|pre_shared_key|priority) | |
51 | wireless_network_${key} "${handle}" "$@" | |
52 | ;; | |
53 | show) | |
54 | wireless_network_show "${handle}" | |
55 | exit $? | |
56 | ;; | |
57 | *) | |
58 | error "Unrecognized argument: ${key}" | |
59 | exit ${EXIT_ERROR} | |
60 | ;; | |
61 | esac | |
62 | ;; | |
63 | esac | |
64 | } | |
65 | ||
66 | wireless_network_list() { | |
67 | list_directory "${NETWORK_WIRELESS_NETWORKS_DIR}" | |
68 | } | |
69 | ||
70 | wireless_network_list_ssids() { | |
71 | local handle | |
72 | for handle in $(wireless_network_list); do | |
73 | local ${WIRELESS_NETWORK_CONFIG_SETTINGS} | |
74 | if ! wireless_network_read_config "${handle}"; then | |
75 | continue | |
76 | fi | |
77 | ||
78 | print "${SSID}" | |
79 | done | |
80 | } | |
81 | ||
82 | # This function writes all values to a via ${ssid} specificated wireless network configuration file | |
83 | wireless_network_write_config() { | |
84 | assert [ $# -ge 1 ] | |
85 | ||
86 | local handle="${1}" | |
87 | ||
88 | local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${handle}/settings" | |
89 | ||
90 | if ! settings_write "${path}" ${WIRELESS_NETWORK_CONFIG_SETTINGS}; then | |
91 | log ERROR "Could not write configuration" | |
92 | return ${EXIT_ERROR} | |
93 | fi | |
94 | ||
95 | # When we get here the writing of the config file was successful | |
96 | return ${EXIT_OK} | |
97 | } | |
98 | ||
99 | # This funtion writes the value for one key to a via ${ssid} specificated | |
100 | # wireless network configuration file | |
101 | wireless_network_write_config_key() { | |
102 | assert [ $# -ge 3 ] | |
103 | ||
104 | local handle="${1}" | |
105 | local key="${2}" | |
106 | shift 2 | |
107 | ||
108 | local value="$@" | |
109 | ||
110 | local ${WIRELESS_NETWORK_CONFIG_SETTINGS} | |
111 | ||
112 | # Read the config settings | |
113 | if ! wireless_network_read_config "${handle}"; then | |
114 | return ${EXIT_ERROR} | |
115 | fi | |
116 | ||
117 | log DEBUG "Set '${key}' to new value '${value}' in wireless network '${SSID}'" | |
118 | ||
119 | # Set the key to a new value | |
120 | assign "${key}" "${value}" | |
121 | ||
122 | if ! wireless_network_write_config "${handle}"; then | |
123 | return ${EXIT_ERROR} | |
124 | fi | |
125 | ||
126 | return ${EXIT_OK} | |
127 | } | |
128 | ||
129 | # Reads one or more keys out of a settings file or all if no key is provided. | |
130 | wireless_network_read_config() { | |
131 | assert [ $# -ge 1 ] | |
132 | ||
133 | local handle="${1}" | |
134 | shift | |
135 | ||
136 | local args | |
137 | if [ $# -eq 0 ] && [ -n "${WIRELESS_NETWORK_CONFIG_SETTINGS}" ]; then | |
138 | list_append args ${WIRELESS_NETWORK_CONFIG_SETTINGS} | |
139 | else | |
140 | list_append args "$@" | |
141 | fi | |
142 | ||
143 | local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${handle}/settings" | |
144 | ||
145 | if ! settings_read "${path}" ${args}; then | |
146 | log ERROR "Could not read settings for wireless network ${handle}" | |
147 | return ${EXIT_ERROR} | |
148 | fi | |
149 | } | |
150 | ||
151 | # This function checks if a wireless network exists | |
152 | # Returns True when yes and false when not | |
153 | wireless_network_exists() { | |
154 | local ssid="${1}" | |
155 | ||
156 | local handle="$(wireless_network_hash "${ssid}")" | |
157 | assert isset handle | |
158 | ||
159 | # We cannot use wireless_network_read_config here beacuse we would end in a loop | |
160 | local SSID | |
161 | if ! settings_read "${NETWORK_WIRELESS_NETWORKS_DIR}/${handle}/settings" SSID; then | |
162 | return ${EXIT_FALSE} | |
163 | fi | |
164 | ||
165 | if [ "${SSID}" = "${ssid}" ]; then | |
166 | return ${EXIT_TRUE} | |
167 | else | |
168 | return ${EXIT_FALSE} | |
169 | fi | |
170 | } | |
171 | ||
172 | wireless_network_hash() { | |
173 | assert [ $# -eq 1 ] | |
174 | ||
175 | local string="${1}" | |
176 | ||
177 | local hash=$(echo -n "${string}" | md5sum ) | |
178 | hash=${hash%% -} | |
179 | ||
180 | local path="${NETWORK_WIRELESS_NETWORKS_DIR}/*${hash}" | |
181 | ||
182 | if [ -d "${path}" ]; then | |
183 | basename "${path}" | |
184 | else | |
185 | local normalized=$(normalize "${string}") | |
186 | normalized=${normalized%-} | |
187 | echo "${normalized}-${hash}" | |
188 | fi | |
189 | } | |
190 | ||
191 | wireless_network_new() { | |
192 | if [ $# -gt 1 ]; then | |
193 | error "Too many arguments" | |
194 | return ${EXIT_ERROR} | |
195 | fi | |
196 | ||
197 | local ssid="${1}" | |
198 | ||
199 | if ! isset ssid; then | |
200 | error "Please provide a SSID" | |
201 | return ${EXIT_ERROR} | |
202 | fi | |
203 | ||
204 | # Check for duplicates | |
205 | if wireless_network_exists "${ssid}"; then | |
206 | error "The wireless network ${ssid} already exists" | |
207 | return ${EXIT_ERROR} | |
208 | fi | |
209 | ||
210 | local handle="$(wireless_network_hash "${ssid}")" | |
211 | assert isset handle | |
212 | ||
213 | log DEBUG "Creating wireless network '${ssid}'" | |
214 | ||
215 | if ! mkdir -p "${NETWORK_WIRELESS_NETWORKS_DIR}/${handle}"; then | |
216 | log ERROR "Could not create config directory for wireless network ${ssid}" | |
217 | return ${EXIT_ERROR} | |
218 | fi | |
219 | ||
220 | local ${WIRELESS_NETWORK_CONFIG_SETTINGS} | |
221 | ENCRYPTION_MODE="${WIRELESS_DEFAULT_ENCRYPTION_MODE}" | |
222 | SSID="${ssid}" | |
223 | PRIORITY=500 | |
224 | ||
225 | if ! wireless_network_write_config "${handle}"; then | |
226 | log ERROR "Could not write new config file" | |
227 | return ${EXIT_ERROR} | |
228 | fi | |
229 | } | |
230 | ||
231 | # Deletes a wireless network | |
232 | wireless_network_destroy() { | |
233 | local ssid="${1}" | |
234 | ||
235 | if ! wireless_network_exists "${ssid}"; then | |
236 | error "No such wireless network: ${ssid}" | |
237 | return ${EXIT_ERROR} | |
238 | fi | |
239 | ||
240 | local handle="$(wireless_network_hash "${ssid}")" | |
241 | assert isset handle | |
242 | ||
243 | if ! rm -rf "${NETWORK_WIRELESS_NETWORKS_DIR}/${handle}"; then | |
244 | error "Could not delete the wireless network" | |
245 | return ${EXIT_ERROR} | |
246 | fi | |
247 | ||
248 | log INFO "Successfully destroyed wireless network ${ssid}" | |
249 | return ${EXIT_OK} | |
250 | } | |
251 | ||
252 | wireless_network_encryption_mode() { | |
253 | if [ ! $# -eq 2 ]; then | |
254 | log ERROR "Not enough arguments" | |
255 | return ${EXIT_ERROR} | |
256 | fi | |
257 | local handle="${1}" | |
258 | local mode="${2}" | |
259 | ||
260 | if ! isoneof mode ${WIRELESS_VALID_ENCRYPTION_MODES}; then | |
261 | log ERROR "Encryption mode '${mode}' is invalid" | |
262 | return ${EXIT_ERROR} | |
263 | fi | |
264 | ||
265 | local ${WIRELESS_NETWORK_CONFIG_SETTINGS} | |
266 | if ! wireless_network_read_config "${handle}"; then | |
267 | error "Could not read configuration" | |
268 | return ${EXIT_ERROR} | |
269 | fi | |
270 | ||
271 | # Validate the PSK when changing mode and reset if needed | |
272 | if isset PSK && [ "${mode}" != "NONE" ] && \ | |
273 | ! wireless_pre_shared_key_is_valid "${mode}" "${PSK}"; then | |
274 | log WARNING "The configured pre-shared-key is incompatible with this encryption mode and has been reset" | |
275 | PSK="" | |
276 | fi | |
277 | ||
278 | # Save new encryption mode | |
279 | ENCRYPTION_MODE="${mode}" | |
280 | ||
281 | if ! wireless_network_write_config "${handle}"; then | |
282 | log ERROR "Could not write configuration settings" | |
283 | return ${EXIT_ERROR} | |
284 | fi | |
285 | } | |
286 | ||
287 | wireless_network_pre_shared_key() { | |
288 | if [ ! $# -eq 2 ]; then | |
289 | log ERROR "Not enough arguments" | |
290 | return ${EXIT_ERROR} | |
291 | fi | |
292 | ||
293 | local handle="${1}" | |
294 | local psk="${2}" | |
295 | ||
296 | local ${WIRELESS_NETWORK_CONFIG_SETTINGS} | |
297 | if ! wireless_network_read_config "${handle}"; then | |
298 | error "Could not read configuration" | |
299 | return ${EXIT_ERROR} | |
300 | fi | |
301 | ||
302 | # Validate the key if encryption mode is known | |
303 | if isset ENCRYPTION_MODE && [ "${ENCRYPTION_MODE}" != "NONE" ]; then | |
304 | if ! wireless_pre_share_key_is_valid "${ENCRYPTION_MODE}" "${psk}"; then | |
305 | error "The pre-shared-key is invalid for this wireless network: ${psk}" | |
306 | return ${EXIT_ERROR} | |
307 | fi | |
308 | fi | |
309 | ||
310 | if ! wireless_network_write_config_key "${handle}" "PSK" "${psk}"; then | |
311 | log ERROR "Could not write configuration settings" | |
312 | return ${EXIT_ERROR} | |
313 | fi | |
314 | } | |
315 | ||
316 | wireless_network_priority() { | |
317 | if [ ! $# -eq 2 ]; then | |
318 | log ERROR "Not enough arguments" | |
319 | return ${EXIT_ERROR} | |
320 | fi | |
321 | ||
322 | local handle="${1}" | |
323 | local priority=${2} | |
324 | ||
325 | if ! isinteger priority && [ ! ${priority} -ge 0 ]; then | |
326 | log ERROR "The priority must be an integer greater or eqal zero" | |
327 | return ${EXIT_ERROR} | |
328 | fi | |
329 | ||
330 | if ! wireless_network_write_config_key "${handle}" "PRIORITY" "${priority}"; then | |
331 | log ERROR "Could not write configuration settings" | |
332 | return ${EXIT_ERROR} | |
333 | fi | |
334 | } | |
335 | ||
336 | wireless_networks_write_wpa_supplicant_configuration() { | |
337 | local device="${1}" | |
338 | ||
339 | local file="${WPA_SUPPLICANT_CONF_DIR}/${device}.conf" | |
340 | ||
341 | # Ensure we can write the file | |
342 | make_parent_directory "${file}" | |
343 | ||
344 | local country="$(wireless_get_reg_domain)" | |
345 | ||
346 | ( | |
347 | config_header "WPA supplicant configuration file" | |
348 | ||
349 | # Set control socket directory. | |
350 | print "ctrl_interface=${WPA_SUPPLICANT_SOCKET_DIR}" | |
351 | ||
352 | # Honour country | |
353 | if isset country; then | |
354 | print "country=${country}" | |
355 | ||
356 | fi | |
357 | ||
358 | wireless_networks_to_wpa_supplicant | |
359 | ) > ${file} | |
360 | } | |
361 | ||
362 | wireless_networks_to_wpa_supplicant() { | |
363 | local handle | |
364 | for handle in $(wireless_network_list); do | |
365 | wireless_network_to_wpa_supplicant "${handle}" | |
366 | done | |
367 | } | |
368 | ||
369 | wireless_network_to_wpa_supplicant() { | |
370 | local handle="${1}" | |
371 | ||
372 | local ${WIRELESS_NETWORK_CONFIG_SETTINGS} | |
373 | if ! wireless_network_read_config "${handle}"; then | |
374 | error "Could not read configuration for ${handle}" | |
375 | return ${EXIT_ERROR} | |
376 | fi | |
377 | ||
378 | local auth_alg | |
379 | local group | |
380 | local key_mgmt | |
381 | local pairwise | |
382 | local proto | |
383 | ||
384 | local mode | |
385 | for mode in ${WIRELESS_NETWORK_SUPPORTED_MODES}; do | |
386 | # Skip any disabled modes | |
387 | if isset ENCRYPTION_MODES && ! list_match "${mode}" ${ENCRYPTION_MODES}; then | |
388 | continue | |
389 | fi | |
390 | ||
391 | case "${mode}" in | |
392 | # WPA2 (802.11i) | |
393 | WPA2-PSK|WPA2-PSK-SHA256) | |
394 | list_append_unique auth_alg "OPEN" | |
395 | list_append_unique key_mgmt "${mode/WPA2/WPA}" | |
396 | list_append_unique proto "RSN" | |
397 | ||
398 | local p | |
399 | for p in CCMP TKIP; do | |
400 | list_append_unique pairwise "${p}" | |
401 | done | |
402 | ||
403 | local g | |
404 | for g in CCMP TKIP WEP104 WEP40; do | |
405 | list_append_unique group "${g}" | |
406 | done | |
407 | ;; | |
408 | ||
409 | # WPA | |
410 | WPA-PSK|WPA-PSK-SHA256) | |
411 | list_append_unique auth_alg "OPEN" | |
412 | list_append_unique key_mgmt "${mode}" | |
413 | list_append_unique proto "WPA" | |
414 | ||
415 | local p | |
416 | for p in CCMP TKIP; do | |
417 | list_append_unique pairwise "${p}" | |
418 | done | |
419 | ||
420 | local g | |
421 | for g in CCMP TKIP WEP104 WEP40; do | |
422 | list_append_unique group "${g}" | |
423 | done | |
424 | ;; | |
425 | ||
426 | # No encryption. DANGEROUS! | |
427 | NONE) | |
428 | list_append_unique auth_alg "OPEN" | |
429 | list_append_unique key_mgmt "NONE" | |
430 | ;; | |
431 | esac | |
432 | done | |
433 | ||
434 | assert isset auth_alg | |
435 | assert isset key_mgmt | |
436 | ||
437 | print_indent 0 "# ${SSID}" | |
438 | print_indent 0 "network={" | |
439 | print_indent 1 "ssid=\"${SSID}\"" | |
440 | ||
441 | # Priority | |
442 | if isinteger PRIORITY; then | |
443 | print_indent 1 "priority=${PRIORITY}" | |
444 | fi | |
445 | ||
446 | ||
447 | # Authentication | |
448 | print_indent 1 "# Authentication" | |
449 | print_indent 1 "auth_alg=${auth_alg}" | |
450 | print_indent 1 "key_mgmt=${key_mgmt}" | |
451 | ||
452 | local i | |
453 | for i in proto pairwise group; do | |
454 | print_indent 1 "${i}=${!i}" | |
455 | done | |
456 | ||
457 | ||
458 | # PSK | |
459 | if isset PSK; then | |
460 | print_indent 1 "# Pre Shared Key" | |
461 | print_indent 1 "psk=\"${PSK}\"" | |
462 | fi | |
463 | ||
464 | if isset EAP_MODES; then | |
465 | print_indent 1 "# EAP" | |
466 | print_indent 1 "eap=${EAP_MODES}" | |
467 | ||
468 | fi | |
469 | ||
470 | print_indent 0 "}" | |
471 | ||
472 | } |