246
char **add_to_argv(char **argv, int *argc, char *arg){
249
argv = malloc(sizeof(char*) * 2);
268
/* Removes and free a plugin from the plugin list */
269
static void free_plugin(plugin *plugin_node){
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
274
free(plugin_node->argv);
275
for(char **env = plugin_node->environ; *env != NULL; env++){
278
free(plugin_node->environ);
279
free(plugin_node->buffer);
281
/* Removes the plugin from the singly-linked list */
282
if(plugin_node == plugin_list){
283
/* First one - simple */
284
plugin_list = plugin_list->next;
286
/* Second one or later */
287
for(plugin *p = plugin_list; p != NULL; p = p->next){
288
if(p->next == plugin_node){
289
p->next = plugin_node->next;
253
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
257
argv = realloc(argv, sizeof(char *)
258
* ((unsigned int) *argc + 1));
267
static void free_plugin_list(plugin *plugin_list){
268
for(plugin *next; plugin_list != NULL; plugin_list = next){
269
next = plugin_list->next;
270
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
273
free(plugin_list->argv);
274
for(char **env = plugin_list->environ; *env != NULL; env++){
277
free(plugin_list->environ);
298
static void free_plugin_list(void){
299
while(plugin_list != NULL){
300
free_plugin(plugin_list);
282
304
int main(int argc, char *argv[]){
283
const char *plugindir = "/lib/mandos/plugins.d";
284
const char *argfile = ARGFILE;
305
char *plugindir = NULL;
306
char *argfile = NULL;
286
308
size_t d_name_len;
319
341
{ .name = "global-options", .key = 'g',
320
342
.arg = "OPTION[,OPTION[,...]]",
321
343
.doc = "Options passed to all plugins" },
322
{ .name = "global-envs", .key = 'e',
344
{ .name = "global-env", .key = 'G',
323
345
.arg = "VAR=value",
324
346
.doc = "Environment variable passed to all plugins" },
325
347
{ .name = "options-for", .key = 'o',
326
348
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
327
349
.doc = "Options passed only to specified plugin" },
328
{ .name = "envs-for", .key = 'f',
350
{ .name = "env-for", .key = 'E',
329
351
.arg = "PLUGIN:ENV=value",
330
352
.doc = "Environment variable passed to specified plugin" },
331
353
{ .name = "disable", .key = 'd',
333
355
.doc = "Disable a specific plugin", .group = 1 },
356
{ .name = "enable", .key = 'e',
358
.doc = "Enable a specific plugin", .group = 1 },
334
359
{ .name = "plugin-dir", .key = 128,
335
360
.arg = "DIRECTORY",
336
361
.doc = "Specify a different plugin directory", .group = 2 },
337
{ .name = "userid", .key = 129,
338
.arg = "ID", .flags = 0,
339
.doc = "User ID the plugins will run as", .group = 2 },
340
{ .name = "groupid", .key = 130,
341
.arg = "ID", .flags = 0,
342
.doc = "Group ID the plugins will run as", .group = 2 },
343
{ .name = "debug", .key = 131,
344
.doc = "Debug mode", .group = 3 },
362
{ .name = "config-file", .key = 129,
364
.doc = "Specify a different configuration file", .group = 2 },
365
{ .name = "userid", .key = 130,
366
.arg = "ID", .flags = 0,
367
.doc = "User ID the plugins will run as", .group = 3 },
368
{ .name = "groupid", .key = 131,
369
.arg = "ID", .flags = 0,
370
.doc = "Group ID the plugins will run as", .group = 3 },
371
{ .name = "debug", .key = 132,
372
.doc = "Debug mode", .group = 4 },
348
error_t parse_opt (int key, char *arg, struct argp_state *state) {
349
/* Get the INPUT argument from `argp_parse', which we know is a
350
pointer to our plugin list pointer. */
351
plugin **plugins = state->input;
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
379
case 'g': /* --global-options */
354
380
if (arg != NULL){
356
382
while((p = strsep(&arg, ",")) != NULL){
357
383
if(p[0] == '\0'){
360
if(not add_argument(getplugin(NULL, plugins), p)){
386
if(not add_argument(getplugin(NULL), p)){
361
387
perror("add_argument");
362
388
return ARGP_ERR_UNKNOWN;
393
case 'G': /* --global-env */
372
char *envdef = strdup(arg);
376
if(not add_environment(getplugin(NULL, plugins), envdef)){
377
perror("add_environment");
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
401
case 'o': /* --options-for */
382
402
if (arg != NULL){
383
403
char *p_name = strsep(&arg, ":");
384
if(p_name[0] == '\0'){
404
if(p_name[0] == '\0' or arg == NULL){
387
407
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0' or opt == NULL){
393
while((p = strsep(&opt, ",")) != NULL){
397
if(not add_argument(getplugin(p_name, plugins), p)){
398
perror("add_argument");
399
return ARGP_ERR_UNKNOWN;
412
while((p = strsep(&opt, ",")) != NULL){
416
if(not add_argument(getplugin(p_name), p)){
417
perror("add_argument");
418
return ARGP_ERR_UNKNOWN;
423
case 'E': /* --env-for */
411
429
if(envdef == NULL){
414
char *p_name = strndup(arg, (size_t) (envdef-arg));
419
if(not add_environment(getplugin(p_name, plugins), envdef)){
433
if(not add_environment(getplugin(arg), envdef+1, true)){
420
434
perror("add_environment");
438
case 'd': /* --disable */
425
439
if (arg != NULL){
426
plugin *p = getplugin(arg, plugins);
440
plugin *p = getplugin(arg);
428
442
return ARGP_ERR_UNKNOWN;
430
444
p->disabled = true;
447
case 'e': /* --enable */
449
plugin *p = getplugin(arg);
451
return ARGP_ERR_UNKNOWN;
456
case 128: /* --plugin-dir */
458
plugindir = strdup(arg);
459
if(plugindir == NULL){
463
case 129: /* --config-file */
464
/* This is already done by parse_opt_config_file() */
466
case 130: /* --userid */
437
467
uid = (uid_t)strtol(arg, NULL, 10);
469
case 131: /* --groupid */
440
470
gid = (gid_t)strtol(arg, NULL, 10);
472
case 132: /* --debug */
445
475
case ARGP_KEY_ARG:
446
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
451
return ARGP_ERR_UNKNOWN;
456
plugin *plugin_list = NULL;
458
struct argp argp = { .options = options, .parser = parse_opt,
459
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
476
/* Cryptsetup always passes an argument, which is an empty
477
string if "none" was specified in /etc/crypttab. So if
478
argument was empty, we ignore it silently. */
480
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
486
return ARGP_ERR_UNKNOWN;
491
/* This option parser is the same as parse_opt() above, except it
492
ignores everything but the --config-file option. */
493
error_t parse_opt_config_file (int key, char *arg,
494
__attribute__((unused))
495
struct argp_state *state) {
497
case 'g': /* --global-options */
498
case 'G': /* --global-env */
499
case 'o': /* --options-for */
500
case 'E': /* --env-for */
501
case 'd': /* --disable */
502
case 'e': /* --enable */
503
case 128: /* --plugin-dir */
505
case 129: /* --config-file */
507
argfile = strdup(arg);
512
case 130: /* --userid */
513
case 131: /* --groupid */
514
case 132: /* --debug */
519
return ARGP_ERR_UNKNOWN;
524
struct argp argp = { .options = options,
525
.parser = parse_opt_config_file,
460
527
.doc = "Mandos plugin runner -- Run plugins" };
462
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
529
/* Parse using the parse_opt_config_file in order to get the custom
530
config file location, if any. */
531
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
463
532
if (ret == ARGP_ERR_UNKNOWN){
464
533
fprintf(stderr, "Unknown error while parsing arguments\n");
465
534
exitstatus = EXIT_FAILURE;
469
conffp = fopen(argfile, "r");
538
/* Reset to the normal argument parser */
539
argp.parser = parse_opt;
541
/* Open the configfile if available */
542
if (argfile == NULL){
543
conffp = fopen(AFILE, "r");
545
conffp = fopen(argfile, "r");
470
547
if(conffp != NULL){
471
548
char *org_line = NULL;
472
549
char *p, *arg, *new_arg, *line;
840
960
(unsigned int) (proc->pid));
843
964
/* Remove the plugin */
844
965
FD_CLR(proc->fd, &rfds_all);
845
967
/* Block signal while modifying process_list */
846
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
968
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
848
970
perror("sigprocmask");
849
971
exitstatus = EXIT_FAILURE;
852
/* Delete this process entry from the list */
853
if(process_list == proc){
854
/* First one - simple */
855
process_list = proc->next;
857
/* Second one or later */
858
for(process *p = process_list; p != NULL; p = p->next){
860
p->next = proc->next;
865
975
/* We are done modifying process list, so unblock signal */
866
976
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
869
979
perror("sigprocmask");
873
/* We deleted this process from the list, so we can't go
874
proc->next. Therefore, start over from the beginning of
980
exitstatus = EXIT_FAILURE;
984
if(plugin_list == NULL){
988
plugin *next_plugin = proc->next;
878
994
/* This process exited nicely, so print its buffer */
880
bool bret = print_out_password(proc->buffer, proc->buffer_length);
996
bool bret = print_out_password(proc->buffer,
997
proc->buffer_length);
882
999
perror("print_out_password");
883
1000
exitstatus = EXIT_FAILURE;
887
1005
/* This process has not completed. Does it have any output? */
888
1006
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
889
1007
/* This process had nothing to say at this time */
892
1011
/* Before reading, make the process' data buffer large enough */
922
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
923
/* Fallback if all plugins failed, none are found or an error occured */
1042
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1043
/* Fallback if all plugins failed, none are found or an error
925
1046
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
926
1047
char *passwordbuffer = getpass("Password: ");
927
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1048
size_t len = strlen(passwordbuffer);
1049
/* Strip trailing newline */
1050
if(len > 0 and passwordbuffer[len-1] == '\n'){
1051
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1054
bret = print_out_password(passwordbuffer, len);
929
1056
perror("print_out_password");
930
1057
exitstatus = EXIT_FAILURE;
941
1068
if(custom_argv != NULL){
942
for(char **arg = custom_argv; *arg != NULL; arg++){
1069
for(char **arg = custom_argv+1; *arg != NULL; arg++){
945
1072
free(custom_argv);
947
free_plugin_list(plugin_list);
949
1075
if(dir != NULL){
953
1079
/* Free the process list and kill the processes */
954
for(process *next; process_list != NULL; process_list = next){
955
next = process_list->next;
956
close(process_list->fd);
957
ret = kill(process_list->pid, SIGTERM);
958
if(ret == -1 and errno != ESRCH){
959
/* set-uid proccesses migth not get closed */
1080
for(plugin *p = plugin_list; p != NULL; p = p->next){
1083
ret = kill(p->pid, SIGTERM);
1084
if(ret == -1 and errno != ESRCH){
1085
/* Set-uid proccesses might not get closed */
962
free(process_list->buffer);
966
1091
/* Wait for any remaining child processes to terminate */